diff options
| -rw-r--r-- | tools/libxc/xc_elf.h | 525 | ||||
| -rw-r--r-- | xen/arch/x86/boot/mkelf32.c | 2 | ||||
| -rw-r--r-- | xen/common/Makefile | 2 | ||||
| -rw-r--r-- | xen/common/libelf/Makefile | 4 | ||||
| -rw-r--r-- | xen/common/libelf/README | 1 | ||||
| -rw-r--r-- | xen/common/libelf/libelf-dominfo.c | 420 | ||||
| -rw-r--r-- | xen/common/libelf/libelf-loader.c | 156 | ||||
| -rw-r--r-- | xen/common/libelf/libelf-private.h | 51 | ||||
| -rw-r--r-- | xen/common/libelf/libelf-relocate.c | 345 | ||||
| -rw-r--r-- | xen/common/libelf/libelf-tools.c | 225 | ||||
| -rw-r--r-- | xen/include/public/elfstructs.h | 527 | ||||
| -rw-r--r-- | xen/include/public/libelf.h | 238 | ||||
| -rw-r--r-- | xen/include/xen/elf.h | 490 |
13 files changed, 1972 insertions, 1014 deletions
diff --git a/tools/libxc/xc_elf.h b/tools/libxc/xc_elf.h index 6507667abd..089df2b070 100644 --- a/tools/libxc/xc_elf.h +++ b/tools/libxc/xc_elf.h @@ -1,524 +1 @@ -/* - * Copyright (c) 1995, 1996 Erik Theisen. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -typedef uint8_t Elf_Byte; - -typedef uint32_t Elf32_Addr; /* Unsigned program address */ -typedef uint32_t Elf32_Off; /* Unsigned file offset */ -typedef int32_t Elf32_Sword; /* Signed large integer */ -typedef uint32_t Elf32_Word; /* Unsigned large integer */ -typedef uint16_t Elf32_Half; /* Unsigned medium integer */ - -typedef uint64_t Elf64_Addr; -typedef uint64_t Elf64_Off; -typedef int32_t Elf64_Shalf; - -typedef int32_t Elf64_Sword; -typedef uint32_t Elf64_Word; - -typedef int64_t Elf64_Sxword; -typedef uint64_t Elf64_Xword; - -typedef uint32_t Elf64_Half; -typedef uint16_t Elf64_Quarter; - -/* - * e_ident[] identification indexes - * See http://www.caldera.com/developers/gabi/2000-07-17/ch4.eheader.html - */ -#define EI_MAG0 0 /* file ID */ -#define EI_MAG1 1 /* file ID */ -#define EI_MAG2 2 /* file ID */ -#define EI_MAG3 3 /* file ID */ -#define EI_CLASS 4 /* file class */ -#define EI_DATA 5 /* data encoding */ -#define EI_VERSION 6 /* ELF header version */ -#define EI_OSABI 7 /* OS/ABI ID */ -#define EI_ABIVERSION 8 /* ABI version */ -#define EI_PAD 9 /* start of pad bytes */ -#define EI_NIDENT 16 /* Size of e_ident[] */ - -/* e_ident[] magic number */ -#define ELFMAG0 0x7f /* e_ident[EI_MAG0] */ -#define ELFMAG1 'E' /* e_ident[EI_MAG1] */ -#define ELFMAG2 'L' /* e_ident[EI_MAG2] */ -#define ELFMAG3 'F' /* e_ident[EI_MAG3] */ -#define ELFMAG "\177ELF" /* magic */ -#define SELFMAG 4 /* size of magic */ - -/* e_ident[] file class */ -#define ELFCLASSNONE 0 /* invalid */ -#define ELFCLASS32 1 /* 32-bit objs */ -#define ELFCLASS64 2 /* 64-bit objs */ -#define ELFCLASSNUM 3 /* number of classes */ - -/* e_ident[] data encoding */ -#define ELFDATANONE 0 /* invalid */ -#define ELFDATA2LSB 1 /* Little-Endian */ -#define ELFDATA2MSB 2 /* Big-Endian */ -#define ELFDATANUM 3 /* number of data encode defines */ - -/* e_ident[] Operating System/ABI */ -#define ELFOSABI_SYSV 0 /* UNIX System V ABI */ -#define ELFOSABI_HPUX 1 /* HP-UX operating system */ -#define ELFOSABI_NETBSD 2 /* NetBSD */ -#define ELFOSABI_LINUX 3 /* GNU/Linux */ -#define ELFOSABI_HURD 4 /* GNU/Hurd */ -#define ELFOSABI_86OPEN 5 /* 86Open common IA32 ABI */ -#define ELFOSABI_SOLARIS 6 /* Solaris */ -#define ELFOSABI_MONTEREY 7 /* Monterey */ -#define ELFOSABI_IRIX 8 /* IRIX */ -#define ELFOSABI_FREEBSD 9 /* FreeBSD */ -#define ELFOSABI_TRU64 10 /* TRU64 UNIX */ -#define ELFOSABI_MODESTO 11 /* Novell Modesto */ -#define ELFOSABI_OPENBSD 12 /* OpenBSD */ -#define ELFOSABI_ARM 97 /* ARM */ -#define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */ - -/* e_ident */ -#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \ - (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \ - (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \ - (ehdr).e_ident[EI_MAG3] == ELFMAG3) - -/* ELF Header */ -typedef struct elfhdr { - unsigned char e_ident[EI_NIDENT]; /* ELF Identification */ - Elf32_Half e_type; /* object file type */ - Elf32_Half e_machine; /* machine */ - Elf32_Word e_version; /* object file version */ - Elf32_Addr e_entry; /* virtual entry point */ - Elf32_Off e_phoff; /* program header table offset */ - Elf32_Off e_shoff; /* section header table offset */ - Elf32_Word e_flags; /* processor-specific flags */ - Elf32_Half e_ehsize; /* ELF header size */ - Elf32_Half e_phentsize; /* program header entry size */ - Elf32_Half e_phnum; /* number of program header entries */ - Elf32_Half e_shentsize; /* section header entry size */ - Elf32_Half e_shnum; /* number of section header entries */ - Elf32_Half e_shstrndx; /* section header table's "section - header string table" entry offset */ -} Elf32_Ehdr; - -typedef struct { - unsigned char e_ident[EI_NIDENT]; /* Id bytes */ - Elf64_Quarter e_type; /* file type */ - Elf64_Quarter e_machine; /* machine type */ - Elf64_Half e_version; /* version number */ - Elf64_Addr e_entry; /* entry point */ - Elf64_Off e_phoff; /* Program hdr offset */ - Elf64_Off e_shoff; /* Section hdr offset */ - Elf64_Half e_flags; /* Processor flags */ - Elf64_Quarter e_ehsize; /* sizeof ehdr */ - Elf64_Quarter e_phentsize; /* Program header entry size */ - Elf64_Quarter e_phnum; /* Number of program headers */ - Elf64_Quarter e_shentsize; /* Section header entry size */ - Elf64_Quarter e_shnum; /* Number of section headers */ - Elf64_Quarter e_shstrndx; /* String table index */ -} Elf64_Ehdr; - -/* e_type */ -#define ET_NONE 0 /* No file type */ -#define ET_REL 1 /* relocatable file */ -#define ET_EXEC 2 /* executable file */ -#define ET_DYN 3 /* shared object file */ -#define ET_CORE 4 /* core file */ -#define ET_NUM 5 /* number of types */ -#define ET_LOPROC 0xff00 /* reserved range for processor */ -#define ET_HIPROC 0xffff /* specific e_type */ - -/* e_machine */ -#define EM_NONE 0 /* No Machine */ -#define EM_M32 1 /* AT&T WE 32100 */ -#define EM_SPARC 2 /* SPARC */ -#define EM_386 3 /* Intel 80386 */ -#define EM_68K 4 /* Motorola 68000 */ -#define EM_88K 5 /* Motorola 88000 */ -#define EM_486 6 /* Intel 80486 - unused? */ -#define EM_860 7 /* Intel 80860 */ -#define EM_MIPS 8 /* MIPS R3000 Big-Endian only */ -/* - * Don't know if EM_MIPS_RS4_BE, - * EM_SPARC64, EM_PARISC, - * or EM_PPC are ABI compliant - */ -#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */ -#define EM_SPARC64 11 /* SPARC v9 64-bit unoffical */ -#define EM_PARISC 15 /* HPPA */ -#define EM_SPARC32PLUS 18 /* Enhanced instruction set SPARC */ -#define EM_PPC 20 /* PowerPC */ -#define EM_PPC64 21 /* PowerPC 64-bit */ -#define EM_ARM 40 /* Advanced RISC Machines ARM */ -#define EM_ALPHA 41 /* DEC ALPHA */ -#define EM_SPARCV9 43 /* SPARC version 9 */ -#define EM_ALPHA_EXP 0x9026 /* DEC ALPHA */ -#define EM_IA_64 50 /* Intel Merced */ -#define EM_X86_64 62 /* AMD x86-64 architecture */ -#define EM_VAX 75 /* DEC VAX */ - -/* Version */ -#define EV_NONE 0 /* Invalid */ -#define EV_CURRENT 1 /* Current */ -#define EV_NUM 2 /* number of versions */ - -/* Section Header */ -typedef struct { - Elf32_Word sh_name; /* name - index into section header - string table section */ - Elf32_Word sh_type; /* type */ - Elf32_Word sh_flags; /* flags */ - Elf32_Addr sh_addr; /* address */ - Elf32_Off sh_offset; /* file offset */ - Elf32_Word sh_size; /* section size */ - Elf32_Word sh_link; /* section header table index link */ - Elf32_Word sh_info; /* extra information */ - Elf32_Word sh_addralign; /* address alignment */ - Elf32_Word sh_entsize; /* section entry size */ -} Elf32_Shdr; - -typedef struct { - Elf64_Half sh_name; /* section name */ - Elf64_Half sh_type; /* section type */ - Elf64_Xword sh_flags; /* section flags */ - Elf64_Addr sh_addr; /* virtual address */ - Elf64_Off sh_offset; /* file offset */ - Elf64_Xword sh_size; /* section size */ - Elf64_Half sh_link; /* link to another */ - Elf64_Half sh_info; /* misc info */ - Elf64_Xword sh_addralign; /* memory alignment */ - Elf64_Xword sh_entsize; /* table entry size */ -} Elf64_Shdr; - -/* Special Section Indexes */ -#define SHN_UNDEF 0 /* undefined */ -#define SHN_LORESERVE 0xff00 /* lower bounds of reserved indexes */ -#define SHN_LOPROC 0xff00 /* reserved range for processor */ -#define SHN_HIPROC 0xff1f /* specific section indexes */ -#define SHN_ABS 0xfff1 /* absolute value */ -#define SHN_COMMON 0xfff2 /* common symbol */ -#define SHN_HIRESERVE 0xffff /* upper bounds of reserved indexes */ - -/* sh_type */ -#define SHT_NULL 0 /* inactive */ -#define SHT_PROGBITS 1 /* program defined information */ -#define SHT_SYMTAB 2 /* symbol table section */ -#define SHT_STRTAB 3 /* string table section */ -#define SHT_RELA 4 /* relocation section with addends*/ -#define SHT_HASH 5 /* symbol hash table section */ -#define SHT_DYNAMIC 6 /* dynamic section */ -#define SHT_NOTE 7 /* note section */ -#define SHT_NOBITS 8 /* no space section */ -#define SHT_REL 9 /* relation section without addends */ -#define SHT_SHLIB 10 /* reserved - purpose unknown */ -#define SHT_DYNSYM 11 /* dynamic symbol table section */ -#define SHT_NUM 12 /* number of section types */ -#define SHT_LOPROC 0x70000000 /* reserved range for processor */ -#define SHT_HIPROC 0x7fffffff /* specific section header types */ -#define SHT_LOUSER 0x80000000 /* reserved range for application */ -#define SHT_HIUSER 0xffffffff /* specific indexes */ - -/* Section names */ -#define ELF_BSS ".bss" /* uninitialized data */ -#define ELF_DATA ".data" /* initialized data */ -#define ELF_DEBUG ".debug" /* debug */ -#define ELF_DYNAMIC ".dynamic" /* dynamic linking information */ -#define ELF_DYNSTR ".dynstr" /* dynamic string table */ -#define ELF_DYNSYM ".dynsym" /* dynamic symbol table */ -#define ELF_FINI ".fini" /* termination code */ -#define ELF_GOT ".got" /* global offset table */ -#define ELF_HASH ".hash" /* symbol hash table */ -#define ELF_INIT ".init" /* initialization code */ -#define ELF_REL_DATA ".rel.data" /* relocation data */ -#define ELF_REL_FINI ".rel.fini" /* relocation termination code */ -#define ELF_REL_INIT ".rel.init" /* relocation initialization code */ -#define ELF_REL_DYN ".rel.dyn" /* relocaltion dynamic link info */ -#define ELF_REL_RODATA ".rel.rodata" /* relocation read-only data */ -#define ELF_REL_TEXT ".rel.text" /* relocation code */ -#define ELF_RODATA ".rodata" /* read-only data */ -#define ELF_SHSTRTAB ".shstrtab" /* section header string table */ -#define ELF_STRTAB ".strtab" /* string table */ -#define ELF_SYMTAB ".symtab" /* symbol table */ -#define ELF_TEXT ".text" /* code */ - - -/* Section Attribute Flags - sh_flags */ -#define SHF_WRITE 0x1 /* Writable */ -#define SHF_ALLOC 0x2 /* occupies memory */ -#define SHF_EXECINSTR 0x4 /* executable */ -#define SHF_MASKPROC 0xf0000000 /* reserved bits for processor */ - /* specific section attributes */ - -/* Symbol Table Entry */ -typedef struct elf32_sym { - Elf32_Word st_name; /* name - index into string table */ - Elf32_Addr st_value; /* symbol value */ - Elf32_Word st_size; /* symbol size */ - unsigned char st_info; /* type and binding */ - unsigned char st_other; /* 0 - no defined meaning */ - Elf32_Half st_shndx; /* section header index */ -} Elf32_Sym; - -typedef struct { - Elf64_Half st_name; /* Symbol name index in str table */ - Elf_Byte st_info; /* type / binding attrs */ - Elf_Byte st_other; /* unused */ - Elf64_Quarter st_shndx; /* section index of symbol */ - Elf64_Xword st_value; /* value of symbol */ - Elf64_Xword st_size; /* size of symbol */ -} Elf64_Sym; - -/* Symbol table index */ -#define STN_UNDEF 0 /* undefined */ - -/* Extract symbol info - st_info */ -#define ELF32_ST_BIND(x) ((x) >> 4) -#define ELF32_ST_TYPE(x) (((unsigned int) x) & 0xf) -#define ELF32_ST_INFO(b,t) (((b) << 4) + ((t) & 0xf)) - -#define ELF64_ST_BIND(x) ((x) >> 4) -#define ELF64_ST_TYPE(x) (((unsigned int) x) & 0xf) -#define ELF64_ST_INFO(b,t) (((b) << 4) + ((t) & 0xf)) - -/* Symbol Binding - ELF32_ST_BIND - st_info */ -#define STB_LOCAL 0 /* Local symbol */ -#define STB_GLOBAL 1 /* Global symbol */ -#define STB_WEAK 2 /* like global - lower precedence */ -#define STB_NUM 3 /* number of symbol bindings */ -#define STB_LOPROC 13 /* reserved range for processor */ -#define STB_HIPROC 15 /* specific symbol bindings */ - -/* Symbol type - ELF32_ST_TYPE - st_info */ -#define STT_NOTYPE 0 /* not specified */ -#define STT_OBJECT 1 /* data object */ -#define STT_FUNC 2 /* function */ -#define STT_SECTION 3 /* section */ -#define STT_FILE 4 /* file */ -#define STT_NUM 5 /* number of symbol types */ -#define STT_LOPROC 13 /* reserved range for processor */ -#define STT_HIPROC 15 /* specific symbol types */ - -/* Relocation entry with implicit addend */ -typedef struct { - Elf32_Addr r_offset; /* offset of relocation */ - Elf32_Word r_info; /* symbol table index and type */ -} Elf32_Rel; - -/* Relocation entry with explicit addend */ -typedef struct { - Elf32_Addr r_offset; /* offset of relocation */ - Elf32_Word r_info; /* symbol table index and type */ - Elf32_Sword r_addend; -} Elf32_Rela; - -/* Extract relocation info - r_info */ -#define ELF32_R_SYM(i) ((i) >> 8) -#define ELF32_R_TYPE(i) ((unsigned char) (i)) -#define ELF32_R_INFO(s,t) (((s) << 8) + (unsigned char)(t)) - -typedef struct { - Elf64_Xword r_offset; /* where to do it */ - Elf64_Xword r_info; /* index & type of relocation */ -} Elf64_Rel; - -typedef struct { - Elf64_Xword r_offset; /* where to do it */ - Elf64_Xword r_info; /* index & type of relocation */ - Elf64_Sxword r_addend; /* adjustment value */ -} Elf64_Rela; - -#define ELF64_R_SYM(info) ((info) >> 32) -#define ELF64_R_TYPE(info) ((info) & 0xFFFFFFFF) -#define ELF64_R_INFO(s,t) (((s) << 32) + (u_int32_t)(t)) - -/* Program Header */ -typedef struct { - Elf32_Word p_type; /* segment type */ - Elf32_Off p_offset; /* segment offset */ - Elf32_Addr p_vaddr; /* virtual address of segment */ - Elf32_Addr p_paddr; /* physical address - ignored? */ - Elf32_Word p_filesz; /* number of bytes in file for seg. */ - Elf32_Word p_memsz; /* number of bytes in mem. for seg. */ - Elf32_Word p_flags; /* flags */ - Elf32_Word p_align; /* memory alignment */ -} Elf32_Phdr; - -typedef struct { - Elf64_Half p_type; /* entry type */ - Elf64_Half p_flags; /* flags */ - Elf64_Off p_offset; /* offset */ - Elf64_Addr p_vaddr; /* virtual address */ - Elf64_Addr p_paddr; /* physical address */ - Elf64_Xword p_filesz; /* file size */ - Elf64_Xword p_memsz; /* memory size */ - Elf64_Xword p_align; /* memory & file alignment */ -} Elf64_Phdr; - -/* Segment types - p_type */ -#define PT_NULL 0 /* unused */ -#define PT_LOAD 1 /* loadable segment */ -#define PT_DYNAMIC 2 /* dynamic linking section */ -#define PT_INTERP 3 /* the RTLD */ -#define PT_NOTE 4 /* auxiliary information */ -#define PT_SHLIB 5 /* reserved - purpose undefined */ -#define PT_PHDR 6 /* program header */ -#define PT_NUM 7 /* Number of segment types */ -#define PT_LOPROC 0x70000000 /* reserved range for processor */ -#define PT_HIPROC 0x7fffffff /* specific segment types */ - -/* Segment flags - p_flags */ -#define PF_X 0x1 /* Executable */ -#define PF_W 0x2 /* Writable */ -#define PF_R 0x4 /* Readable */ -#define PF_MASKPROC 0xf0000000 /* reserved bits for processor */ - /* specific segment flags */ - -/* Dynamic structure */ -typedef struct { - Elf32_Sword d_tag; /* controls meaning of d_val */ - union { - Elf32_Word d_val; /* Multiple meanings - see d_tag */ - Elf32_Addr d_ptr; /* program virtual address */ - } d_un; -} Elf32_Dyn; - -typedef struct { - Elf64_Xword d_tag; /* controls meaning of d_val */ - union { - Elf64_Addr d_ptr; - Elf64_Xword d_val; - } d_un; -} Elf64_Dyn; - -/* Dynamic Array Tags - d_tag */ -#define DT_NULL 0 /* marks end of _DYNAMIC array */ -#define DT_NEEDED 1 /* string table offset of needed lib */ -#define DT_PLTRELSZ 2 /* size of relocation entries in PLT */ -#define DT_PLTGOT 3 /* address PLT/GOT */ -#define DT_HASH 4 /* address of symbol hash table */ -#define DT_STRTAB 5 /* address of string table */ -#define DT_SYMTAB 6 /* address of symbol table */ -#define DT_RELA 7 /* address of relocation table */ -#define DT_RELASZ 8 /* size of relocation table */ -#define DT_RELAENT 9 /* size of relocation entry */ -#define DT_STRSZ 10 /* size of string table */ -#define DT_SYMENT 11 /* size of symbol table entry */ -#define DT_INIT 12 /* address of initialization func. */ -#define DT_FINI 13 /* address of termination function */ -#define DT_SONAME 14 /* string table offset of shared obj */ -#define DT_RPATH 15 /* string table offset of library - search path */ -#define DT_SYMBOLIC 16 /* start sym search in shared obj. */ -#define DT_REL 17 /* address of rel. tbl. w addends */ -#define DT_RELSZ 18 /* size of DT_REL relocation table */ -#define DT_RELENT 19 /* size of DT_REL relocation entry */ -#define DT_PLTREL 20 /* PLT referenced relocation entry */ -#define DT_DEBUG 21 /* bugger */ -#define DT_TEXTREL 22 /* Allow rel. mod. to unwritable seg */ -#define DT_JMPREL 23 /* add. of PLT's relocation entries */ -#define DT_BIND_NOW 24 /* Bind now regardless of env setting */ -#define DT_NUM 25 /* Number used. */ -#define DT_LOPROC 0x70000000 /* reserved range for processor */ -#define DT_HIPROC 0x7fffffff /* specific dynamic array tags */ - -/* Standard ELF hashing function */ -unsigned int elf_hash(const unsigned char *name); - -/* - * Note Definitions - */ -typedef struct { - Elf32_Word namesz; - Elf32_Word descsz; - Elf32_Word type; -} Elf32_Note; - -typedef struct { - Elf64_Half namesz; - Elf64_Half descsz; - Elf64_Half type; -} Elf64_Note; - - -#if defined(ELFSIZE) -#define CONCAT(x,y) __CONCAT(x,y) -#define ELFNAME(x) CONCAT(elf,CONCAT(ELFSIZE,CONCAT(_,x))) -#define ELFNAME2(x,y) CONCAT(x,CONCAT(_elf,CONCAT(ELFSIZE,CONCAT(_,y)))) -#define ELFNAMEEND(x) CONCAT(x,CONCAT(_elf,ELFSIZE)) -#define ELFDEFNNAME(x) CONCAT(ELF,CONCAT(ELFSIZE,CONCAT(_,x))) -#endif - -#if defined(ELFSIZE) && (ELFSIZE == 32) -#define Elf_Ehdr Elf32_Ehdr -#define Elf_Phdr Elf32_Phdr -#define Elf_Shdr Elf32_Shdr -#define Elf_Sym Elf32_Sym -#define Elf_Rel Elf32_Rel -#define Elf_RelA Elf32_Rela -#define Elf_Dyn Elf32_Dyn -#define Elf_Word Elf32_Word -#define Elf_Sword Elf32_Sword -#define Elf_Addr Elf32_Addr -#define Elf_Off Elf32_Off -#define Elf_Nhdr Elf32_Nhdr -#define Elf_Note Elf32_Note - -#define ELF_R_SYM ELF32_R_SYM -#define ELF_R_TYPE ELF32_R_TYPE -#define ELF_R_INFO ELF32_R_INFO -#define ELFCLASS ELFCLASS32 - -#define ELF_ST_BIND ELF32_ST_BIND -#define ELF_ST_TYPE ELF32_ST_TYPE -#define ELF_ST_INFO ELF32_ST_INFO - -#define AuxInfo Aux32Info -#elif defined(ELFSIZE) && (ELFSIZE == 64) -#define Elf_Ehdr Elf64_Ehdr -#define Elf_Phdr Elf64_Phdr -#define Elf_Shdr Elf64_Shdr -#define Elf_Sym Elf64_Sym -#define Elf_Rel Elf64_Rel -#define Elf_RelA Elf64_Rela -#define Elf_Dyn Elf64_Dyn -#define Elf_Word Elf64_Word -#define Elf_Sword Elf64_Sword -#define Elf_Addr Elf64_Addr -#define Elf_Off Elf64_Off -#define Elf_Nhdr Elf64_Nhdr -#define Elf_Note Elf64_Note - -#define ELF_R_SYM ELF64_R_SYM -#define ELF_R_TYPE ELF64_R_TYPE -#define ELF_R_INFO ELF64_R_INFO -#define ELFCLASS ELFCLASS64 - -#define ELF_ST_BIND ELF64_ST_BIND -#define ELF_ST_TYPE ELF64_ST_TYPE -#define ELF_ST_INFO ELF64_ST_INFO - -#define AuxInfo Aux64Info -#endif - +#include <xen/elfstructs.h> diff --git a/xen/arch/x86/boot/mkelf32.c b/xen/arch/x86/boot/mkelf32.c index 18e52b5836..94cd3d84cc 100644 --- a/xen/arch/x86/boot/mkelf32.c +++ b/xen/arch/x86/boot/mkelf32.c @@ -25,7 +25,7 @@ #define s16 int16_t #define s32 int32_t #define s64 int64_t -#include "../../../include/xen/elf.h" +#include "../../../include/public/elfstructs.h" #define DYNAMICALLY_FILLED 0 #define RAW_OFFSET 128 diff --git a/xen/common/Makefile b/xen/common/Makefile index 0c9b9b2333..7e3b03daaf 100644 --- a/xen/common/Makefile +++ b/xen/common/Makefile @@ -37,6 +37,8 @@ obj-$(CONFIG_XENCOMM) += xencomm.o subdir-$(CONFIG_COMPAT) += compat +subdir-y += libelf + # Object file contains changeset and compiler information. version.o: $(BASEDIR)/include/xen/compile.h diff --git a/xen/common/libelf/Makefile b/xen/common/libelf/Makefile new file mode 100644 index 0000000000..a586e1ae12 --- /dev/null +++ b/xen/common/libelf/Makefile @@ -0,0 +1,4 @@ +obj-y += libelf-tools.o +obj-y += libelf-loader.o +obj-y += libelf-dominfo.o +#obj-y += libelf-relocate.o diff --git a/xen/common/libelf/README b/xen/common/libelf/README new file mode 100644 index 0000000000..c54a6933e1 --- /dev/null +++ b/xen/common/libelf/README @@ -0,0 +1 @@ +Take care, this code is used by both xen and tools ... diff --git a/xen/common/libelf/libelf-dominfo.c b/xen/common/libelf/libelf-dominfo.c new file mode 100644 index 0000000000..c19339ab01 --- /dev/null +++ b/xen/common/libelf/libelf-dominfo.c @@ -0,0 +1,420 @@ +/* + * parse xen-specific informations out of elf kernel binaries. + */ + +#include "libelf-private.h" + +/* ------------------------------------------------------------------------ */ +/* xen features */ + +const char *elf_xen_feature_names[] = { + [XENFEAT_writable_page_tables] = "writable_page_tables", + [XENFEAT_writable_descriptor_tables] = "writable_descriptor_tables", + [XENFEAT_auto_translated_physmap] = "auto_translated_physmap", + [XENFEAT_supervisor_mode_kernel] = "supervisor_mode_kernel", + [XENFEAT_pae_pgdir_above_4gb] = "pae_pgdir_above_4gb" +}; +const int elf_xen_features = + sizeof(elf_xen_feature_names) / sizeof(elf_xen_feature_names[0]); + +int elf_xen_parse_features(const char *features, + uint32_t *supported, + uint32_t *required) +{ + char feature[64]; + int pos, len, i; + + if (NULL == features) + return 0; + for (pos = 0; features[pos] != '\0'; pos += len) + { + memset(feature, 0, sizeof(feature)); + for (len = 0;; len++) + { + if (len >= sizeof(feature)-1) + break; + if (features[pos + len] == '\0') + break; + if (features[pos + len] == '|') + { + len++; + break; + } + feature[len] = features[pos + len]; + } + + for (i = 0; i < elf_xen_features; i++) + { + if (!elf_xen_feature_names[i]) + continue; + if (NULL != required && feature[0] == '!') + { + /* required */ + if (0 == strcmp(feature + 1, elf_xen_feature_names[i])) + { + elf_xen_feature_set(i, supported); + elf_xen_feature_set(i, required); + break; + } + } + else + { + /* supported */ + if (0 == strcmp(feature, elf_xen_feature_names[i])) + { + elf_xen_feature_set(i, supported); + break; + } + } + } + if (i == elf_xen_features) + return -1; + } + return 0; +} + +/* ------------------------------------------------------------------------ */ +/* xen elf notes */ + +int elf_xen_parse_note(struct elf_binary *elf, + struct elf_dom_parms *parms, + const elf_note *note) +{ +/* *INDENT-OFF* */ + static const struct { + char *name; + int str; + } note_desc[] = { + [XEN_ELFNOTE_ENTRY] = { "ENTRY", 0}, + [XEN_ELFNOTE_HYPERCALL_PAGE] = { "HYPERCALL_PAGE", 0}, + [XEN_ELFNOTE_VIRT_BASE] = { "VIRT_BASE", 0}, + [XEN_ELFNOTE_PADDR_OFFSET] = { "PADDR_OFFSET", 0}, + [XEN_ELFNOTE_HV_START_LOW] = { "HV_START_LOW", 0}, + [XEN_ELFNOTE_XEN_VERSION] = { "XEN_VERSION", 1}, + [XEN_ELFNOTE_GUEST_OS] = { "GUEST_OS", 1}, + [XEN_ELFNOTE_GUEST_VERSION] = { "GUEST_VERSION", 1}, + [XEN_ELFNOTE_LOADER] = { "LOADER", 1}, + [XEN_ELFNOTE_PAE_MODE] = { "PAE_MODE", 1}, + [XEN_ELFNOTE_FEATURES] = { "FEATURES", 1}, + [XEN_ELFNOTE_BSD_SYMTAB] = { "BSD_SYMTAB", 1}, + }; +/* *INDENT-ON* */ + + const char *str = NULL; + uint64_t val = 0; + int type = elf_uval(elf, note, type); + + if ((type >= sizeof(note_desc) / sizeof(note_desc[0])) || + (NULL == note_desc[type].name)) + { + elf_err(elf, "%s: unknown xen elf note (0x%x)\n", + __FUNCTION__, type); + return -1; + } + + if (note_desc[type].str) + { + str = elf_note_desc(elf, note); + elf_msg(elf, "%s: %s = \"%s\"\n", __FUNCTION__, + note_desc[type].name, str); + } + else + { + val = elf_note_numeric(elf, note); + elf_msg(elf, "%s: %s = 0x%" PRIx64 "\n", __FUNCTION__, + note_desc[type].name, val); + } + + switch (type) + { + case XEN_ELFNOTE_LOADER: + strncpy(parms->loader, str, sizeof(parms->loader)); + break; + case XEN_ELFNOTE_GUEST_OS: + strncpy(parms->guest_os, str, sizeof(parms->guest_os)); + break; + case XEN_ELFNOTE_GUEST_VERSION: + strncpy(parms->guest_ver, str, sizeof(parms->guest_ver)); + break; + case XEN_ELFNOTE_XEN_VERSION: + strncpy(parms->xen_ver, str, sizeof(parms->xen_ver)); + break; + case XEN_ELFNOTE_PAE_MODE: + if (0 == strcmp(str, "yes")) + parms->pae = 2 /* extended_cr3 */; + if (strstr(str, "bimodal")) + parms->pae = 3 /* bimodal */; + break; + case XEN_ELFNOTE_BSD_SYMTAB: + if (0 == strcmp(str, "yes")) + parms->bsd_symtab = 1; + break; + + case XEN_ELFNOTE_VIRT_BASE: + parms->virt_base = val; + break; + case XEN_ELFNOTE_ENTRY: + parms->virt_entry = val; + break; + case XEN_ELFNOTE_PADDR_OFFSET: + parms->elf_paddr_offset = val; + break; + case XEN_ELFNOTE_HYPERCALL_PAGE: + parms->virt_hypercall = val; + break; + case XEN_ELFNOTE_HV_START_LOW: + parms->virt_hv_start_low = val; + break; + + case XEN_ELFNOTE_FEATURES: + if (0 != elf_xen_parse_features(str, parms->f_supported, + parms->f_required)) + return -1; + break; + + } + return 0; +} + +/* ------------------------------------------------------------------------ */ +/* __xen_guest section */ + +int elf_xen_parse_guest_info(struct elf_binary *elf, + struct elf_dom_parms *parms) +{ + const char *h; + char name[32], value[128]; + int len; + + h = parms->guest_info; + while (*h) + { + memset(name, 0, sizeof(name)); + memset(value, 0, sizeof(value)); + for (len = 0;; len++, h++) { + if (len >= sizeof(name)-1) + break; + if (*h == '\0') + break; + if (*h == ',') + { + h++; + break; + } + if (*h == '=') + { + h++; + for (len = 0;; len++, h++) { + if (len >= sizeof(value)-1) + break; + if (*h == '\0') + break; + if (*h == ',') + { + h++; + break; + } + value[len] = *h; + } + break; + } + name[len] = *h; + } + elf_msg(elf, "%s: %s=\"%s\"\n", __FUNCTION__, name, value); + + /* strings */ + if (0 == strcmp(name, "LOADER")) + strncpy(parms->loader, value, sizeof(parms->loader)); + if (0 == strcmp(name, "GUEST_OS")) + strncpy(parms->guest_os, value, sizeof(parms->guest_os)); + if (0 == strcmp(name, "GUEST_VER")) + strncpy(parms->guest_ver, value, sizeof(parms->guest_ver)); + if (0 == strcmp(name, "XEN_VER")) + strncpy(parms->xen_ver, value, sizeof(parms->xen_ver)); + if (0 == strcmp(name, "PAE")) + { + if (0 == strcmp(value, "yes[extended-cr3]")) + parms->pae = 2 /* extended_cr3 */; + else if (0 == strncmp(value, "yes", 3)) + parms->pae = 1 /* yes */; + } + if (0 == strcmp(name, "BSD_SYMTAB")) + parms->bsd_symtab = 1; + + /* longs */ + if (0 == strcmp(name, "VIRT_BASE")) + parms->virt_base = strtoull(value, NULL, 0); + if (0 == strcmp(name, "VIRT_ENTRY")) + parms->virt_entry = strtoull(value, NULL, 0); + if (0 == strcmp(name, "ELF_PADDR_OFFSET")) + parms->elf_paddr_offset = strtoull(value, NULL, 0); + if (0 == strcmp(name, "HYPERCALL_PAGE")) + parms->virt_hypercall = (strtoull(value, NULL, 0) << 12) + + parms->virt_base; + + /* other */ + if (0 == strcmp(name, "FEATURES")) + if (0 != elf_xen_parse_features(value, parms->f_supported, + parms->f_required)) + return -1; + } + return 0; +} + +/* ------------------------------------------------------------------------ */ +/* sanity checks */ + +static int elf_xen_note_check(struct elf_binary *elf, + struct elf_dom_parms *parms) +{ + if (NULL == parms->elf_note_start && NULL == parms->guest_info) { + int machine = elf_uval(elf, elf->ehdr, e_machine); + if (EM_386 == machine || EM_X86_64 == machine) { + elf_err(elf, "%s: ERROR: Not a Xen-ELF image: " + "No ELF notes or '__xen_guest' section found.\n", + __FUNCTION__); + return -1; + } + return 0; + } + + /* Check the contents of the Xen notes or guest string. */ + if ( ( 0 == strlen(parms->loader) || strncmp(parms->loader, "generic", 7) ) && + ( 0 == strlen(parms->guest_os) || strncmp(parms->guest_os, "linux", 5) ) ) + { + elf_err(elf, "%s: ERROR: Will only load images built for the generic " + "loader or Linux images", __FUNCTION__); + return -1; + } + + if ( 0 == strlen(parms->xen_ver) || strncmp(parms->xen_ver, "xen-3.0", 7) ) + { + elf_err(elf, "%s: ERROR: Xen will only load images built for Xen v3.0\n", + __FUNCTION__); + return -1; + } + return 0; +} + +static int elf_xen_addr_calc_check(struct elf_binary *elf, + struct elf_dom_parms *parms) +{ + if (UNSET_ADDR != parms->elf_paddr_offset && + UNSET_ADDR == parms->virt_base ) + { + elf_err(elf, "%s: ERROR: ELF_PADDR_OFFSET set, VIRT_BASE unset\n", + __FUNCTION__); + return -1; + } + + /* Initial guess for virt_base is 0 if it is not explicitly defined. */ + if (UNSET_ADDR == parms->virt_base) + { + parms->virt_base = 0; + elf_msg(elf, "%s: VIRT_BASE unset, using 0x%" PRIx64 "\n", + __FUNCTION__, parms->virt_base); + } + + /* + * If we are using the legacy __xen_guest section then elf_pa_off + * defaults to v_start in order to maintain compatibility with + * older hypervisors which set padd in the ELF header to + * virt_base. + * + * If we are using the modern ELF notes interface then the default + * is 0. + */ + if (UNSET_ADDR == parms->elf_paddr_offset) + { + if (parms->elf_note_start) + parms->elf_paddr_offset = 0; + else + parms->elf_paddr_offset = parms->virt_base; + elf_msg(elf, "%s: ELF_PADDR_OFFSET unset, using 0x%" PRIx64 "\n", + __FUNCTION__, parms->elf_paddr_offset); + } + + parms->virt_offset = parms->virt_base - parms->elf_paddr_offset; + parms->virt_kstart = elf->pstart + parms->virt_offset; + parms->virt_kend = elf->pend + parms->virt_offset; + + if (UNSET_ADDR == parms->virt_entry) + parms->virt_entry = elf_uval(elf, elf->ehdr, e_entry); + + elf_msg(elf, "%s: addresses:\n", __FUNCTION__); + elf_msg(elf, " virt_base = 0x%" PRIx64 "\n", parms->virt_base); + elf_msg(elf, " elf_paddr_offset = 0x%" PRIx64 "\n", parms->elf_paddr_offset); + elf_msg(elf, " virt_offset = 0x%" PRIx64 "\n", parms->virt_offset); + elf_msg(elf, " virt_kstart = 0x%" PRIx64 "\n", parms->virt_kstart); + elf_msg(elf, " virt_kend = 0x%" PRIx64 "\n", parms->virt_kend); + elf_msg(elf, " virt_entry = 0x%" PRIx64 "\n", parms->virt_entry); + + if ( (parms->virt_kstart > parms->virt_kend) || + (parms->virt_entry < parms->virt_kstart) || + (parms->virt_entry > parms->virt_kend) || + (parms->virt_base > parms->virt_kstart) ) + { + elf_err(elf, "%s: ERROR: ELF start or entries are out of bounds.\n", + __FUNCTION__); + return -1; + } + + return 0; +} + +/* ------------------------------------------------------------------------ */ +/* glue it all together ... */ + +int elf_xen_parse(struct elf_binary *elf, + struct elf_dom_parms *parms) +{ + const elf_note *note; + const elf_shdr *shdr; + int xen_elfnotes = 0; + int i, count; + + memset(parms, 0, sizeof(*parms)); + parms->virt_base = UNSET_ADDR; + parms->virt_entry = UNSET_ADDR; + parms->virt_hypercall = UNSET_ADDR; + parms->virt_hv_start_low = UNSET_ADDR; + parms->elf_paddr_offset = UNSET_ADDR; + + /* find and parse elf notes */ + count = elf_shdr_count(elf); + for (i = 0; i < count; i++) + { + shdr = elf_shdr_by_index(elf, i); + if (0 == strcmp(elf_section_name(elf, shdr), "__xen_guest")) + parms->guest_info = elf_section_start(elf, shdr); + if (elf_uval(elf, shdr, sh_type) != SHT_NOTE) + continue; + parms->elf_note_start = elf_section_start(elf, shdr); + parms->elf_note_end = elf_section_end(elf, shdr); + for (note = parms->elf_note_start; + (void *)note < parms->elf_note_end; + note = elf_note_next(elf, note)) + { + if (0 != strcmp(elf_note_name(elf, note), "Xen")) + continue; + if (0 != elf_xen_parse_note(elf, parms, note)) + return -1; + xen_elfnotes++; + } + } + + if (!xen_elfnotes && parms->guest_info) + { + parms->elf_note_start = NULL; + parms->elf_note_end = NULL; + elf_msg(elf, "%s: __xen_guest: \"%s\"\n", __FUNCTION__, + parms->guest_info); + elf_xen_parse_guest_info(elf, parms); + } + + if (0 != elf_xen_note_check(elf, parms)) + return -1; + if (0 != elf_xen_addr_calc_check(elf, parms)) + return -1; + return 0; +} diff --git a/xen/common/libelf/libelf-loader.c b/xen/common/libelf/libelf-loader.c new file mode 100644 index 0000000000..381c90b5cc --- /dev/null +++ b/xen/common/libelf/libelf-loader.c @@ -0,0 +1,156 @@ +/* + * parse and load elf binaries + */ + +#include "libelf-private.h" + +/* ------------------------------------------------------------------------ */ + +int elf_init(struct elf_binary *elf, const char *image, size_t size) +{ + const elf_shdr *shdr; + uint64_t i, count, section, offset; + + if (!elf_is_elfbinary(image)) + { + elf_err(elf, "%s: not an ELF binary\n", __FUNCTION__); + return -1; + } + + memset(elf, 0, sizeof(*elf)); + elf->image = image; + elf->size = size; + elf->ehdr = (elf_ehdr *) image; + elf->class = elf->ehdr->e32.e_ident[EI_CLASS]; + elf->data = elf->ehdr->e32.e_ident[EI_DATA]; + + /* sanity check phdr */ + offset = elf_uval(elf, elf->ehdr, e_phoff) + + elf_uval(elf, elf->ehdr, e_phentsize) * elf_phdr_count(elf); + if (offset > elf->size) + { + elf_err(elf, "%s: phdr overflow (off %" PRIx64 " > size %lx)\n", + __FUNCTION__, offset, (unsigned long)elf->size); + return -1; + } + + /* sanity check shdr */ + offset = elf_uval(elf, elf->ehdr, e_shoff) + + elf_uval(elf, elf->ehdr, e_shentsize) * elf_shdr_count(elf); + if (offset > elf->size) + { + elf_err(elf, "%s: shdr overflow (off %" PRIx64 " > size %lx)\n", + __FUNCTION__, offset, (unsigned long)elf->size); + return -1; + } + + /* find section string table */ + section = elf_uval(elf, elf->ehdr, e_shstrndx); + shdr = elf_shdr_by_index(elf, section); + if (NULL != shdr) + elf->sec_strtab = elf_section_start(elf, shdr); + + /* find symbol table, symbol string table */ + count = elf_shdr_count(elf); + for (i = 0; i < count; i++) + { + shdr = elf_shdr_by_index(elf, i); + if (elf_uval(elf, shdr, sh_type) != SHT_SYMTAB) + continue; + elf->sym_tab = shdr; + shdr = elf_shdr_by_index(elf, elf_uval(elf, shdr, sh_link)); + if (NULL == shdr) + { + elf->sym_tab = NULL; + continue; + } + elf->sym_strtab = elf_section_start(elf, shdr); + break; + } + return 0; +} + +#ifndef __XEN__ +void elf_set_logfile(struct elf_binary *elf, FILE * log, int verbose) +{ + elf->log = log; + elf->verbose = verbose; +} +#else +void elf_set_verbose(struct elf_binary *elf) +{ + elf->verbose = 1; +} +#endif + +void elf_parse_binary(struct elf_binary *elf) +{ + const elf_phdr *phdr; + uint64_t low = -1; + uint64_t high = 0; + uint64_t i, count, paddr, memsz; + + count = elf_uval(elf, elf->ehdr, e_phnum); + for (i = 0; i < count; i++) + { + phdr = elf_phdr_by_index(elf, i); + if (!elf_phdr_is_loadable(elf, phdr)) + continue; + paddr = elf_uval(elf, phdr, p_paddr); + memsz = elf_uval(elf, phdr, p_memsz); + elf_msg(elf, "%s: phdr: paddr=0x%" PRIx64 + " memsz=0x%" PRIx64 "\n", __FUNCTION__, paddr, memsz); + if (low > paddr) + low = paddr; + if (high < paddr + memsz) + high = paddr + memsz; + } + elf->pstart = low; + elf->pend = high; + elf_msg(elf, "%s: memory: 0x%" PRIx64 " -> 0x%" PRIx64 "\n", + __FUNCTION__, elf->pstart, elf->pend); +} + +void elf_load_binary(struct elf_binary *elf) +{ + const elf_phdr *phdr; + uint64_t i, count, paddr, offset, filesz, memsz; + char *dest; + + count = elf_uval(elf, elf->ehdr, e_phnum); + for (i = 0; i < count; i++) + { + phdr = elf_phdr_by_index(elf, i); + if (!elf_phdr_is_loadable(elf, phdr)) + continue; + paddr = elf_uval(elf, phdr, p_paddr); + offset = elf_uval(elf, phdr, p_offset); + filesz = elf_uval(elf, phdr, p_filesz); + memsz = elf_uval(elf, phdr, p_memsz); + dest = elf_get_ptr(elf, paddr); + memcpy(dest, elf->image + offset, filesz); + memset(dest + filesz, 0, memsz - filesz); + } +} + +void *elf_get_ptr(struct elf_binary *elf, unsigned long addr) +{ + return elf->dest + addr - elf->pstart; +} + +uint64_t elf_lookup_addr(struct elf_binary * elf, const char *symbol) +{ + const elf_sym *sym; + uint64_t value; + + sym = elf_sym_by_name(elf, symbol); + if (NULL == sym) + { + elf_err(elf, "%s: not found: %s\n", __FUNCTION__, symbol); + return -1; + } + value = elf_uval(elf, sym, st_value); + elf_msg(elf, "%s: symbol \"%s\" at 0x%" PRIx64 "\n", __FUNCTION__, + symbol, value); + return value; +} diff --git a/xen/common/libelf/libelf-private.h b/xen/common/libelf/libelf-private.h new file mode 100644 index 0000000000..dfb47a06d4 --- /dev/null +++ b/xen/common/libelf/libelf-private.h @@ -0,0 +1,51 @@ +#ifdef __XEN__ + +#include <xen/string.h> +#include <xen/lib.h> +#include <public/elfnote.h> +#include <public/libelf.h> + +#define elf_msg(elf, fmt, args ... ) \ + if (elf->verbose) printk(fmt, ## args ) +#define elf_err(elf, fmt, args ... ) \ + printk(fmt, ## args ) + +#define strtoull(str, end, base) simple_strtoull(str, end, base) +#define bswap_16(x) \ + ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8)) +#define bswap_32(x) \ + ( (((x) & 0xff000000) >> 24) \ + | (((x) & 0x00ff0000) >> 8) \ + | (((x) & 0x0000ff00) << 8) \ + | (((x) & 0x000000ff) << 24)) +#define bswap_64(x) \ + ( (((x) & 0xff00000000000000ull) >> 56) \ + | (((x) & 0x00ff000000000000ull) >> 40) \ + | (((x) & 0x0000ff0000000000ull) >> 24) \ + | (((x) & 0x000000ff00000000ull) >> 8) \ + | (((x) & 0x00000000ff000000ull) << 8) \ + | (((x) & 0x0000000000ff0000ull) << 24) \ + | (((x) & 0x000000000000ff00ull) << 40) \ + | (((x) & 0x00000000000000ffull) << 56)) + +#else /* !__XEN__ */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <byteswap.h> +#include <xen/elfnote.h> +#include <xen/libelf.h> + +#include "xenctrl.h" +#include "xc_private.h" + +#define elf_msg(elf, fmt, args ... ) \ + if (elf->log && elf->verbose) fprintf(elf->log, fmt , ## args ) +#define elf_err(elf, fmt, args ... ) do { \ + if (elf->log) \ + fprintf(elf->log, fmt , ## args ); \ + xc_set_error(XC_INVALID_KERNEL, fmt , ## args ); \ + } while (0) + +#endif diff --git a/xen/common/libelf/libelf-relocate.c b/xen/common/libelf/libelf-relocate.c new file mode 100644 index 0000000000..7356a94016 --- /dev/null +++ b/xen/common/libelf/libelf-relocate.c @@ -0,0 +1,345 @@ +/* + * ELF relocation code (not used by xen kernel right now). + */ + +#include "libelf-private.h" + +/* ------------------------------------------------------------------------ */ + +static const char *rel_names_i386[] = { + "R_386_NONE", + "R_386_32", + "R_386_PC32", + "R_386_GOT32", + "R_386_PLT32", + "R_386_COPY", + "R_386_GLOB_DAT", + "R_386_JMP_SLOT", + "R_386_RELATIVE", + "R_386_GOTOFF", + "R_386_GOTPC", + "R_386_32PLT", + "R_386_TLS_TPOFF", + "R_386_TLS_IE", + "R_386_TLS_GOTIE", + "R_386_TLS_LE", + "R_386_TLS_GD", + "R_386_TLS_LDM", + "R_386_16", + "R_386_PC16", + "R_386_8", + "R_386_PC8", + "R_386_TLS_GD_32", + "R_386_TLS_GD_PUSH", + "R_386_TLS_GD_CALL", + "R_386_TLS_GD_POP", + "R_386_TLS_LDM_32", + "R_386_TLS_LDM_PUSH", + "R_386_TLS_LDM_CALL", + "R_386_TLS_LDM_POP", + "R_386_TLS_LDO_32", + "R_386_TLS_IE_32", + "R_386_TLS_LE_32", + "R_386_TLS_DTPMOD32", + "R_386_TLS_DTPOFF32", + "R_386_TLS_TPOFF32", +}; + +static int elf_reloc_i386(struct elf_binary *elf, int type, + uint64_t addr, uint64_t value) +{ + void *ptr = elf_get_ptr(elf, addr); + uint32_t *u32; + + switch (type) + { + case 1 /* R_386_32 */ : + u32 = ptr; + *u32 += elf->reloc_offset; + break; + case 2 /* R_386_PC32 */ : + /* nothing */ + break; + default: + return -1; + } + return 0; +} + +/* ------------------------------------------------------------------------ */ + +static const char *rel_names_x86_64[] = { + "R_X86_64_NONE", + "R_X86_64_64", + "R_X86_64_PC32", + "R_X86_64_GOT32", + "R_X86_64_PLT32", + "R_X86_64_COPY", + "R_X86_64_GLOB_DAT", + "R_X86_64_JUMP_SLOT", + "R_X86_64_RELATIVE", + "R_X86_64_GOTPCREL", + "R_X86_64_32", + "R_X86_64_32S", + "R_X86_64_16", + "R_X86_64_PC16", + "R_X86_64_8", + "R_X86_64_PC8", + "R_X86_64_DTPMOD64", + "R_X86_64_DTPOFF64", + "R_X86_64_TPOFF64", + "R_X86_64_TLSGD", + "R_X86_64_TLSLD", + "R_X86_64_DTPOFF32", + "R_X86_64_GOTTPOFF", + "R_X86_64_TPOFF32", +}; + +static int elf_reloc_x86_64(struct elf_binary *elf, int type, + uint64_t addr, uint64_t value) +{ + void *ptr = elf_get_ptr(elf, addr); + uint64_t *u64; + uint32_t *u32; + int32_t *s32; + + switch (type) + { + case 1 /* R_X86_64_64 */ : + u64 = ptr; + value += elf->reloc_offset; + *u64 = value; + break; + case 2 /* R_X86_64_PC32 */ : + u32 = ptr; + *u32 = value - addr; + if (*u32 != (uint32_t) (value - addr)) + { + elf_err(elf, "R_X86_64_PC32 overflow: 0x%" PRIx32 " != 0x%" PRIx32 "\n", + *u32, (uint32_t) (value - addr)); + return -1; + } + break; + case 10 /* R_X86_64_32 */ : + u32 = ptr; + value += elf->reloc_offset; + *u32 = value; + if (*u32 != value) + { + elf_err(elf, "R_X86_64_32 overflow: 0x%" PRIx32 " != 0x%" PRIx64 "\n", + *u32, value); + return -1; + } + break; + case 11 /* R_X86_64_32S */ : + s32 = ptr; + value += elf->reloc_offset; + *s32 = value; + if (*s32 != (int64_t) value) + { + elf_err(elf, "R_X86_64_32S overflow: 0x%" PRIx32 " != 0x%" PRIx64 "\n", + *s32, (int64_t) value); + return -1; + } + break; + default: + return -1; + } + return 0; +} + +/* ------------------------------------------------------------------------ */ + +static struct relocs { + const char **names; + int count; + int (*func) (struct elf_binary * elf, int type, uint64_t addr, + uint64_t value); +} relocs[] = +/* *INDENT-OFF* */ +{ + [EM_386] = { + .names = rel_names_i386, + .count = sizeof(rel_names_i386) / sizeof(rel_names_i386[0]), + .func = elf_reloc_i386, + }, + [EM_X86_64] = { + .names = rel_names_x86_64, + .count = sizeof(rel_names_x86_64) / sizeof(rel_names_x86_64[0]), + .func = elf_reloc_x86_64, + } +}; +/* *INDENT-ON* */ + +/* ------------------------------------------------------------------------ */ + +static const char *rela_name(int machine, int type) +{ + if (machine > sizeof(relocs) / sizeof(relocs[0])) + return "unknown mach"; + if (!relocs[machine].names) + return "unknown mach"; + if (type > relocs[machine].count) + return "unknown rela"; + return relocs[machine].names[type]; +} + +static int elf_reloc_section(struct elf_binary *elf, + const elf_shdr * rels, + const elf_shdr * sect, const elf_shdr * syms) +{ + const void *ptr, *end; + const elf_shdr *shdr; + const elf_rela *rela; + const elf_rel *rel; + const elf_sym *sym; + uint64_t s_type; + uint64_t r_offset; + uint64_t r_info; + uint64_t r_addend; + int r_type, r_sym; + size_t rsize; + uint64_t shndx, sbase, addr, value; + const char *sname; + int machine; + + machine = elf_uval(elf, elf->ehdr, e_machine); + if (machine >= sizeof(relocs) / sizeof(relocs[0]) || + NULL == relocs[machine].func) + { + elf_err(elf, "%s: can't handle machine %d\n", + __FUNCTION__, machine); + return -1; + } + if (elf_swap(elf)) + { + elf_err(elf, "%s: non-native byte order, relocation not supported\n", + __FUNCTION__); + return -1; + } + + s_type = elf_uval(elf, rels, sh_type); + rsize = (SHT_REL == s_type) ? elf_size(elf, rel) : elf_size(elf, rela); + ptr = elf_section_start(elf, rels); + end = elf_section_end(elf, rels); + + for (; ptr < end; ptr += rsize) + { + switch (s_type) + { + case SHT_REL: + rel = ptr; + r_offset = elf_uval(elf, rel, r_offset); + r_info = elf_uval(elf, rel, r_info); + r_addend = 0; + break; + case SHT_RELA: + rela = ptr; + r_offset = elf_uval(elf, rela, r_offset); + r_info = elf_uval(elf, rela, r_info); + r_addend = elf_uval(elf, rela, r_addend); + break; + default: + /* can't happen */ + return -1; + } + if (elf_64bit(elf)) + { + r_type = ELF64_R_TYPE(r_info); + r_sym = ELF64_R_SYM(r_info); + } + else + { + r_type = ELF32_R_TYPE(r_info); + r_sym = ELF32_R_SYM(r_info); + } + + sym = elf_sym_by_index(elf, r_sym); + shndx = elf_uval(elf, sym, st_shndx); + switch (shndx) + { + case SHN_UNDEF: + sname = "*UNDEF*"; + sbase = 0; + break; + case SHN_COMMON: + elf_err(elf, "%s: invalid section: %" PRId64 "\n", + __FUNCTION__, shndx); + return -1; + case SHN_ABS: + sname = "*ABS*"; + sbase = 0; + break; + default: + shdr = elf_shdr_by_index(elf, shndx); + if (NULL == shdr) + { + elf_err(elf, "%s: invalid section: %" PRId64 "\n", + __FUNCTION__, shndx); + return -1; + } + sname = elf_section_name(elf, shdr); + sbase = elf_uval(elf, shdr, sh_addr); + } + + addr = r_offset; + value = elf_uval(elf, sym, st_value); + value += r_addend; + + if (elf->log && elf->verbose > 1) + { + uint64_t st_name = elf_uval(elf, sym, st_name); + const char *name = st_name ? elf->sym_strtab + st_name : "*NONE*"; + + elf_msg(elf, + "%s: type %s [%d], off 0x%" PRIx64 ", add 0x%" PRIx64 "," + " sym %s [0x%" PRIx64 "], sec %s [0x%" PRIx64 "]" + " -> addr 0x%" PRIx64 " value 0x%" PRIx64 "\n", + __FUNCTION__, rela_name(machine, r_type), r_type, r_offset, + r_addend, name, elf_uval(elf, sym, st_value), sname, sbase, + addr, value); + } + + if (-1 == relocs[machine].func(elf, r_type, addr, value)) + { + elf_err(elf, "%s: unknown/unsupported reloc type %s [%d]\n", + __FUNCTION__, rela_name(machine, r_type), r_type); + return -1; + } + } + return 0; +} + +int elf_reloc(struct elf_binary *elf) +{ + const elf_shdr *rels, *sect, *syms; + uint64_t i, count, type; + + count = elf_shdr_count(elf); + for (i = 0; i < count; i++) + { + rels = elf_shdr_by_index(elf, i); + type = elf_uval(elf, rels, sh_type); + if (type != SHT_REL && type != SHT_RELA) + continue; + + sect = elf_shdr_by_index(elf, elf_uval(elf, rels, sh_info)); + syms = elf_shdr_by_index(elf, elf_uval(elf, rels, sh_link)); + if (NULL == sect || NULL == syms) + continue; + + if (!(elf_uval(elf, sect, sh_flags) & SHF_ALLOC)) + { + elf_msg(elf, "%s: relocations for %s, skipping\n", + __FUNCTION__, elf_section_name(elf, sect)); + continue; + } + + elf_msg(elf, "%s: relocations for %s @ 0x%" PRIx64 "\n", + __FUNCTION__, elf_section_name(elf, sect), + elf_uval(elf, sect, sh_addr)); + if (0 != elf_reloc_section(elf, rels, sect, syms)) + return -1; + } + return 0; +} diff --git a/xen/common/libelf/libelf-tools.c b/xen/common/libelf/libelf-tools.c new file mode 100644 index 0000000000..c6a00c4dc6 --- /dev/null +++ b/xen/common/libelf/libelf-tools.c @@ -0,0 +1,225 @@ +/* + * various helper functions to access elf structures + */ + +#include "libelf-private.h" + +/* ------------------------------------------------------------------------ */ + +uint64_t elf_access_unsigned(struct elf_binary * elf, const void *ptr, + off_t offset, size_t size) +{ + int need_swap = elf_swap(elf); + const uint8_t *u8; + const uint16_t *u16; + const uint32_t *u32; + const uint64_t *u64; + + switch (size) + { + case 1: + u8 = ptr + offset; + return *u8; + case 2: + u16 = ptr + offset; + return need_swap ? bswap_16(*u16) : *u16; + case 4: + u32 = ptr + offset; + return need_swap ? bswap_32(*u32) : *u32; + case 8: + u64 = ptr + offset; + return need_swap ? bswap_64(*u64) : *u64; + default: + return 0; + } +} + +int64_t elf_access_signed(struct elf_binary *elf, const void *ptr, + off_t offset, size_t size) +{ + int need_swap = elf_swap(elf); + const int8_t *s8; + const int16_t *s16; + const int32_t *s32; + const int64_t *s64; + + switch (size) + { + case 1: + s8 = ptr + offset; + return *s8; + case 2: + s16 = ptr + offset; + return need_swap ? bswap_16(*s16) : *s16; + case 4: + s32 = ptr + offset; + return need_swap ? bswap_32(*s32) : *s32; + case 8: + s64 = ptr + offset; + return need_swap ? bswap_64(*s64) : *s64; + default: + return 0; + } +} + +uint64_t elf_round_up(struct elf_binary *elf, uint64_t addr) +{ + int elf_round = (elf_64bit(elf) ? 8 : 4) - 1; + + return (addr + elf_round) & ~elf_round; +} + +/* ------------------------------------------------------------------------ */ + +int elf_shdr_count(struct elf_binary *elf) +{ + return elf_uval(elf, elf->ehdr, e_shnum); +} + +int elf_phdr_count(struct elf_binary *elf) +{ + return elf_uval(elf, elf->ehdr, e_phnum); +} + +const elf_shdr *elf_shdr_by_name(struct elf_binary *elf, const char *name) +{ + uint64_t count = elf_shdr_count(elf); + const elf_shdr *shdr; + const char *sname; + int i; + + for (i = 0; i < count; i++) { + shdr = elf_shdr_by_index(elf, i); + sname = elf_section_name(elf, shdr); + if (sname && 0 == strcmp(sname, name)) + return shdr; + } + return NULL; +} + +const elf_shdr *elf_shdr_by_index(struct elf_binary *elf, int index) +{ + uint64_t count = elf_shdr_count(elf); + const void *ptr = NULL; + + if (index < count) + ptr = elf->image + + elf_uval(elf, elf->ehdr, e_shoff) + + elf_uval(elf, elf->ehdr, e_shentsize) * index; + return ptr; +} + +const elf_phdr *elf_phdr_by_index(struct elf_binary *elf, int index) +{ + uint64_t count = elf_uval(elf, elf->ehdr, e_phnum); + const void *ptr = NULL; + + if (index < count) + ptr = elf->image + + elf_uval(elf, elf->ehdr, e_phoff) + + elf_uval(elf, elf->ehdr, e_phentsize) * index; + return ptr; +} + +const char *elf_section_name(struct elf_binary *elf, const elf_shdr * shdr) +{ + if (NULL == elf->sec_strtab) + return "unknown"; + return elf->sec_strtab + elf_uval(elf, shdr, sh_name); +} + +const void *elf_section_start(struct elf_binary *elf, const elf_shdr * shdr) +{ + return elf->image + elf_uval(elf, shdr, sh_offset); +} + +const void *elf_section_end(struct elf_binary *elf, const elf_shdr * shdr) +{ + return elf->image + + elf_uval(elf, shdr, sh_offset) + elf_uval(elf, shdr, sh_size); +} + +const elf_sym *elf_sym_by_name(struct elf_binary *elf, const char *symbol) +{ + const void *ptr = elf_section_start(elf, elf->sym_tab); + const void *end = elf_section_end(elf, elf->sym_tab); + const elf_sym *sym; + uint64_t info, name; + + for (; ptr < end; ptr += elf_size(elf, sym)) + { + sym = ptr; + info = elf_uval(elf, sym, st_info); + name = elf_uval(elf, sym, st_name); + if (ELF32_ST_BIND(info) != STB_GLOBAL) + continue; + if (strcmp(elf->sym_strtab + name, symbol) != 0) + continue; + return sym; + } + return NULL; +} + +const elf_sym *elf_sym_by_index(struct elf_binary *elf, int index) +{ + const void *ptr = elf_section_start(elf, elf->sym_tab); + const elf_sym *sym; + + sym = ptr + index * elf_size(elf, sym); + return sym; +} + +const char *elf_note_name(struct elf_binary *elf, const elf_note * note) +{ + return (void *)note + elf_size(elf, note); +} + +const void *elf_note_desc(struct elf_binary *elf, const elf_note * note) +{ + int namesz = (elf_uval(elf, note, namesz) + 3) & ~3; + + return (void *)note + elf_size(elf, note) + namesz; +} + +uint64_t elf_note_numeric(struct elf_binary *elf, const elf_note * note) +{ + const void *desc = elf_note_desc(elf, note); + int descsz = elf_uval(elf, note, descsz); + + switch (descsz) + { + case 1: + case 2: + case 4: + case 8: + return elf_access_unsigned(elf, desc, 0, descsz); + default: + return 0; + } +} +const elf_note *elf_note_next(struct elf_binary *elf, const elf_note * note) +{ + int namesz = (elf_uval(elf, note, namesz) + 3) & ~3; + int descsz = (elf_uval(elf, note, descsz) + 3) & ~3; + + return (void *)note + elf_size(elf, note) + namesz + descsz; +} + +/* ------------------------------------------------------------------------ */ + +int elf_is_elfbinary(const void *image) +{ + const Elf32_Ehdr *ehdr = image; + + if (IS_ELF(*ehdr)) + return 1; + return 0; +} + +int elf_phdr_is_loadable(struct elf_binary *elf, const elf_phdr * phdr) +{ + uint64_t p_type = elf_uval(elf, phdr, p_type); + uint64_t p_flags = elf_uval(elf, phdr, p_flags); + + return ((p_type == PT_LOAD) && (p_flags & (PF_W | PF_X)) != 0); +} diff --git a/xen/include/public/elfstructs.h b/xen/include/public/elfstructs.h new file mode 100644 index 0000000000..77362f3b9e --- /dev/null +++ b/xen/include/public/elfstructs.h @@ -0,0 +1,527 @@ +#ifndef __XEN_PUBLIC_ELFSTRUCTS_H__ +#define __XEN_PUBLIC_ELFSTRUCTS_H__ 1 +/* + * Copyright (c) 1995, 1996 Erik Theisen. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +typedef uint8_t Elf_Byte; + +typedef uint32_t Elf32_Addr; /* Unsigned program address */ +typedef uint32_t Elf32_Off; /* Unsigned file offset */ +typedef int32_t Elf32_Sword; /* Signed large integer */ +typedef uint32_t Elf32_Word; /* Unsigned large integer */ +typedef uint16_t Elf32_Half; /* Unsigned medium integer */ + +typedef uint64_t Elf64_Addr; +typedef uint64_t Elf64_Off; +typedef int32_t Elf64_Shalf; + +typedef int32_t Elf64_Sword; +typedef uint32_t Elf64_Word; + +typedef int64_t Elf64_Sxword; +typedef uint64_t Elf64_Xword; + +typedef uint32_t Elf64_Half; +typedef uint16_t Elf64_Quarter; + +/* + * e_ident[] identification indexes + * See http://www.caldera.com/developers/gabi/2000-07-17/ch4.eheader.html + */ +#define EI_MAG0 0 /* file ID */ +#define EI_MAG1 1 /* file ID */ +#define EI_MAG2 2 /* file ID */ +#define EI_MAG3 3 /* file ID */ +#define EI_CLASS 4 /* file class */ +#define EI_DATA 5 /* data encoding */ +#define EI_VERSION 6 /* ELF header version */ +#define EI_OSABI 7 /* OS/ABI ID */ +#define EI_ABIVERSION 8 /* ABI version */ +#define EI_PAD 9 /* start of pad bytes */ +#define EI_NIDENT 16 /* Size of e_ident[] */ + +/* e_ident[] magic number */ +#define ELFMAG0 0x7f /* e_ident[EI_MAG0] */ +#define ELFMAG1 'E' /* e_ident[EI_MAG1] */ +#define ELFMAG2 'L' /* e_ident[EI_MAG2] */ +#define ELFMAG3 'F' /* e_ident[EI_MAG3] */ +#define ELFMAG "\177ELF" /* magic */ +#define SELFMAG 4 /* size of magic */ + +/* e_ident[] file class */ +#define ELFCLASSNONE 0 /* invalid */ +#define ELFCLASS32 1 /* 32-bit objs */ +#define ELFCLASS64 2 /* 64-bit objs */ +#define ELFCLASSNUM 3 /* number of classes */ + +/* e_ident[] data encoding */ +#define ELFDATANONE 0 /* invalid */ +#define ELFDATA2LSB 1 /* Little-Endian */ +#define ELFDATA2MSB 2 /* Big-Endian */ +#define ELFDATANUM 3 /* number of data encode defines */ + +/* e_ident[] Operating System/ABI */ +#define ELFOSABI_SYSV 0 /* UNIX System V ABI */ +#define ELFOSABI_HPUX 1 /* HP-UX operating system */ +#define ELFOSABI_NETBSD 2 /* NetBSD */ +#define ELFOSABI_LINUX 3 /* GNU/Linux */ +#define ELFOSABI_HURD 4 /* GNU/Hurd */ +#define ELFOSABI_86OPEN 5 /* 86Open common IA32 ABI */ +#define ELFOSABI_SOLARIS 6 /* Solaris */ +#define ELFOSABI_MONTEREY 7 /* Monterey */ +#define ELFOSABI_IRIX 8 /* IRIX */ +#define ELFOSABI_FREEBSD 9 /* FreeBSD */ +#define ELFOSABI_TRU64 10 /* TRU64 UNIX */ +#define ELFOSABI_MODESTO 11 /* Novell Modesto */ +#define ELFOSABI_OPENBSD 12 /* OpenBSD */ +#define ELFOSABI_ARM 97 /* ARM */ +#define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */ + +/* e_ident */ +#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \ + (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \ + (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \ + (ehdr).e_ident[EI_MAG3] == ELFMAG3) + +/* ELF Header */ +typedef struct elfhdr { + unsigned char e_ident[EI_NIDENT]; /* ELF Identification */ + Elf32_Half e_type; /* object file type */ + Elf32_Half e_machine; /* machine */ + Elf32_Word e_version; /* object file version */ + Elf32_Addr e_entry; /* virtual entry point */ + Elf32_Off e_phoff; /* program header table offset */ + Elf32_Off e_shoff; /* section header table offset */ + Elf32_Word e_flags; /* processor-specific flags */ + Elf32_Half e_ehsize; /* ELF header size */ + Elf32_Half e_phentsize; /* program header entry size */ + Elf32_Half e_phnum; /* number of program header entries */ + Elf32_Half e_shentsize; /* section header entry size */ + Elf32_Half e_shnum; /* number of section header entries */ + Elf32_Half e_shstrndx; /* section header table's "section + header string table" entry offset */ +} Elf32_Ehdr; + +typedef struct { + unsigned char e_ident[EI_NIDENT]; /* Id bytes */ + Elf64_Quarter e_type; /* file type */ + Elf64_Quarter e_machine; /* machine type */ + Elf64_Half e_version; /* version number */ + Elf64_Addr e_entry; /* entry point */ + Elf64_Off e_phoff; /* Program hdr offset */ + Elf64_Off e_shoff; /* Section hdr offset */ + Elf64_Half e_flags; /* Processor flags */ + Elf64_Quarter e_ehsize; /* sizeof ehdr */ + Elf64_Quarter e_phentsize; /* Program header entry size */ + Elf64_Quarter e_phnum; /* Number of program headers */ + Elf64_Quarter e_shentsize; /* Section header entry size */ + Elf64_Quarter e_shnum; /* Number of section headers */ + Elf64_Quarter e_shstrndx; /* String table index */ +} Elf64_Ehdr; + +/* e_type */ +#define ET_NONE 0 /* No file type */ +#define ET_REL 1 /* relocatable file */ +#define ET_EXEC 2 /* executable file */ +#define ET_DYN 3 /* shared object file */ +#define ET_CORE 4 /* core file */ +#define ET_NUM 5 /* number of types */ +#define ET_LOPROC 0xff00 /* reserved range for processor */ +#define ET_HIPROC 0xffff /* specific e_type */ + +/* e_machine */ +#define EM_NONE 0 /* No Machine */ +#define EM_M32 1 /* AT&T WE 32100 */ +#define EM_SPARC 2 /* SPARC */ +#define EM_386 3 /* Intel 80386 */ +#define EM_68K 4 /* Motorola 68000 */ +#define EM_88K 5 /* Motorola 88000 */ +#define EM_486 6 /* Intel 80486 - unused? */ +#define EM_860 7 /* Intel 80860 */ +#define EM_MIPS 8 /* MIPS R3000 Big-Endian only */ +/* + * Don't know if EM_MIPS_RS4_BE, + * EM_SPARC64, EM_PARISC, + * or EM_PPC are ABI compliant + */ +#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */ +#define EM_SPARC64 11 /* SPARC v9 64-bit unoffical */ +#define EM_PARISC 15 /* HPPA */ +#define EM_SPARC32PLUS 18 /* Enhanced instruction set SPARC */ +#define EM_PPC 20 /* PowerPC */ +#define EM_PPC64 21 /* PowerPC 64-bit */ +#define EM_ARM 40 /* Advanced RISC Machines ARM */ +#define EM_ALPHA 41 /* DEC ALPHA */ +#define EM_SPARCV9 43 /* SPARC version 9 */ +#define EM_ALPHA_EXP 0x9026 /* DEC ALPHA */ +#define EM_IA_64 50 /* Intel Merced */ +#define EM_X86_64 62 /* AMD x86-64 architecture */ +#define EM_VAX 75 /* DEC VAX */ + +/* Version */ +#define EV_NONE 0 /* Invalid */ +#define EV_CURRENT 1 /* Current */ +#define EV_NUM 2 /* number of versions */ + +/* Section Header */ +typedef struct { + Elf32_Word sh_name; /* name - index into section header + string table section */ + Elf32_Word sh_type; /* type */ + Elf32_Word sh_flags; /* flags */ + Elf32_Addr sh_addr; /* address */ + Elf32_Off sh_offset; /* file offset */ + Elf32_Word sh_size; /* section size */ + Elf32_Word sh_link; /* section header table index link */ + Elf32_Word sh_info; /* extra information */ + Elf32_Word sh_addralign; /* address alignment */ + Elf32_Word sh_entsize; /* section entry size */ +} Elf32_Shdr; + +typedef struct { + Elf64_Half sh_name; /* section name */ + Elf64_Half sh_type; /* section type */ + Elf64_Xword sh_flags; /* section flags */ + Elf64_Addr sh_addr; /* virtual address */ + Elf64_Off sh_offset; /* file offset */ + Elf64_Xword sh_size; /* section size */ + Elf64_Half sh_link; /* link to another */ + Elf64_Half sh_info; /* misc info */ + Elf64_Xword sh_addralign; /* memory alignment */ + Elf64_Xword sh_entsize; /* table entry size */ +} Elf64_Shdr; + +/* Special Section Indexes */ +#define SHN_UNDEF 0 /* undefined */ +#define SHN_LORESERVE 0xff00 /* lower bounds of reserved indexes */ +#define SHN_LOPROC 0xff00 /* reserved range for processor */ +#define SHN_HIPROC 0xff1f /* specific section indexes */ +#define SHN_ABS 0xfff1 /* absolute value */ +#define SHN_COMMON 0xfff2 /* common symbol */ +#define SHN_HIRESERVE 0xffff /* upper bounds of reserved indexes */ + +/* sh_type */ +#define SHT_NULL 0 /* inactive */ +#define SHT_PROGBITS 1 /* program defined information */ +#define SHT_SYMTAB 2 /* symbol table section */ +#define SHT_STRTAB 3 /* string table section */ +#define SHT_RELA 4 /* relocation section with addends*/ +#define SHT_HASH 5 /* symbol hash table section */ +#define SHT_DYNAMIC 6 /* dynamic section */ +#define SHT_NOTE 7 /* note section */ +#define SHT_NOBITS 8 /* no space section */ +#define SHT_REL 9 /* relation section without addends */ +#define SHT_SHLIB 10 /* reserved - purpose unknown */ +#define SHT_DYNSYM 11 /* dynamic symbol table section */ +#define SHT_NUM 12 /* number of section types */ +#define SHT_LOPROC 0x70000000 /* reserved range for processor */ +#define SHT_HIPROC 0x7fffffff /* specific section header types */ +#define SHT_LOUSER 0x80000000 /* reserved range for application */ +#define SHT_HIUSER 0xffffffff /* specific indexes */ + +/* Section names */ +#define ELF_BSS ".bss" /* uninitialized data */ +#define ELF_DATA ".data" /* initialized data */ +#define ELF_DEBUG ".debug" /* debug */ +#define ELF_DYNAMIC ".dynamic" /* dynamic linking information */ +#define ELF_DYNSTR ".dynstr" /* dynamic string table */ +#define ELF_DYNSYM ".dynsym" /* dynamic symbol table */ +#define ELF_FINI ".fini" /* termination code */ +#define ELF_GOT ".got" /* global offset table */ +#define ELF_HASH ".hash" /* symbol hash table */ +#define ELF_INIT ".init" /* initialization code */ +#define ELF_REL_DATA ".rel.data" /* relocation data */ +#define ELF_REL_FINI ".rel.fini" /* relocation termination code */ +#define ELF_REL_INIT ".rel.init" /* relocation initialization code */ +#define ELF_REL_DYN ".rel.dyn" /* relocaltion dynamic link info */ +#define ELF_REL_RODATA ".rel.rodata" /* relocation read-only data */ +#define ELF_REL_TEXT ".rel.text" /* relocation code */ +#define ELF_RODATA ".rodata" /* read-only data */ +#define ELF_SHSTRTAB ".shstrtab" /* section header string table */ +#define ELF_STRTAB ".strtab" /* string table */ +#define ELF_SYMTAB ".symtab" /* symbol table */ +#define ELF_TEXT ".text" /* code */ + + +/* Section Attribute Flags - sh_flags */ +#define SHF_WRITE 0x1 /* Writable */ +#define SHF_ALLOC 0x2 /* occupies memory */ +#define SHF_EXECINSTR 0x4 /* executable */ +#define SHF_MASKPROC 0xf0000000 /* reserved bits for processor */ + /* specific section attributes */ + +/* Symbol Table Entry */ +typedef struct elf32_sym { + Elf32_Word st_name; /* name - index into string table */ + Elf32_Addr st_value; /* symbol value */ + Elf32_Word st_size; /* symbol size */ + unsigned char st_info; /* type and binding */ + unsigned char st_other; /* 0 - no defined meaning */ + Elf32_Half st_shndx; /* section header index */ +} Elf32_Sym; + +typedef struct { + Elf64_Half st_name; /* Symbol name index in str table */ + Elf_Byte st_info; /* type / binding attrs */ + Elf_Byte st_other; /* unused */ + Elf64_Quarter st_shndx; /* section index of symbol */ + Elf64_Xword st_value; /* value of symbol */ + Elf64_Xword st_size; /* size of symbol */ +} Elf64_Sym; + +/* Symbol table index */ +#define STN_UNDEF 0 /* undefined */ + +/* Extract symbol info - st_info */ +#define ELF32_ST_BIND(x) ((x) >> 4) +#define ELF32_ST_TYPE(x) (((unsigned int) x) & 0xf) +#define ELF32_ST_INFO(b,t) (((b) << 4) + ((t) & 0xf)) + +#define ELF64_ST_BIND(x) ((x) >> 4) +#define ELF64_ST_TYPE(x) (((unsigned int) x) & 0xf) +#define ELF64_ST_INFO(b,t) (((b) << 4) + ((t) & 0xf)) + +/* Symbol Binding - ELF32_ST_BIND - st_info */ +#define STB_LOCAL 0 /* Local symbol */ +#define STB_GLOBAL 1 /* Global symbol */ +#define STB_WEAK 2 /* like global - lower precedence */ +#define STB_NUM 3 /* number of symbol bindings */ +#define STB_LOPROC 13 /* reserved range for processor */ +#define STB_HIPROC 15 /* specific symbol bindings */ + +/* Symbol type - ELF32_ST_TYPE - st_info */ +#define STT_NOTYPE 0 /* not specified */ +#define STT_OBJECT 1 /* data object */ +#define STT_FUNC 2 /* function */ +#define STT_SECTION 3 /* section */ +#define STT_FILE 4 /* file */ +#define STT_NUM 5 /* number of symbol types */ +#define STT_LOPROC 13 /* reserved range for processor */ +#define STT_HIPROC 15 /* specific symbol types */ + +/* Relocation entry with implicit addend */ +typedef struct { + Elf32_Addr r_offset; /* offset of relocation */ + Elf32_Word r_info; /* symbol table index and type */ +} Elf32_Rel; + +/* Relocation entry with explicit addend */ +typedef struct { + Elf32_Addr r_offset; /* offset of relocation */ + Elf32_Word r_info; /* symbol table index and type */ + Elf32_Sword r_addend; +} Elf32_Rela; + +/* Extract relocation info - r_info */ +#define ELF32_R_SYM(i) ((i) >> 8) +#define ELF32_R_TYPE(i) ((unsigned char) (i)) +#define ELF32_R_INFO(s,t) (((s) << 8) + (unsigned char)(t)) + +typedef struct { + Elf64_Xword r_offset; /* where to do it */ + Elf64_Xword r_info; /* index & type of relocation */ +} Elf64_Rel; + +typedef struct { + Elf64_Xword r_offset; /* where to do it */ + Elf64_Xword r_info; /* index & type of relocation */ + Elf64_Sxword r_addend; /* adjustment value */ +} Elf64_Rela; + +#define ELF64_R_SYM(info) ((info) >> 32) +#define ELF64_R_TYPE(info) ((info) & 0xFFFFFFFF) +#define ELF64_R_INFO(s,t) (((s) << 32) + (u_int32_t)(t)) + +/* Program Header */ +typedef struct { + Elf32_Word p_type; /* segment type */ + Elf32_Off p_offset; /* segment offset */ + Elf32_Addr p_vaddr; /* virtual address of segment */ + Elf32_Addr p_paddr; /* physical address - ignored? */ + Elf32_Word p_filesz; /* number of bytes in file for seg. */ + Elf32_Word p_memsz; /* number of bytes in mem. for seg. */ + Elf32_Word p_flags; /* flags */ + Elf32_Word p_align; /* memory alignment */ +} Elf32_Phdr; + +typedef struct { + Elf64_Half p_type; /* entry type */ + Elf64_Half p_flags; /* flags */ + Elf64_Off p_offset; /* offset */ + Elf64_Addr p_vaddr; /* virtual address */ + Elf64_Addr p_paddr; /* physical address */ + Elf64_Xword p_filesz; /* file size */ + Elf64_Xword p_memsz; /* memory size */ + Elf64_Xword p_align; /* memory & file alignment */ +} Elf64_Phdr; + +/* Segment types - p_type */ +#define PT_NULL 0 /* unused */ +#define PT_LOAD 1 /* loadable segment */ +#define PT_DYNAMIC 2 /* dynamic linking section */ +#define PT_INTERP 3 /* the RTLD */ +#define PT_NOTE 4 /* auxiliary information */ +#define PT_SHLIB 5 /* reserved - purpose undefined */ +#define PT_PHDR 6 /* program header */ +#define PT_NUM 7 /* Number of segment types */ +#define PT_LOPROC 0x70000000 /* reserved range for processor */ +#define PT_HIPROC 0x7fffffff /* specific segment types */ + +/* Segment flags - p_flags */ +#define PF_X 0x1 /* Executable */ +#define PF_W 0x2 /* Writable */ +#define PF_R 0x4 /* Readable */ +#define PF_MASKPROC 0xf0000000 /* reserved bits for processor */ + /* specific segment flags */ + +/* Dynamic structure */ +typedef struct { + Elf32_Sword d_tag; /* controls meaning of d_val */ + union { + Elf32_Word d_val; /* Multiple meanings - see d_tag */ + Elf32_Addr d_ptr; /* program virtual address */ + } d_un; +} Elf32_Dyn; + +typedef struct { + Elf64_Xword d_tag; /* controls meaning of d_val */ + union { + Elf64_Addr d_ptr; + Elf64_Xword d_val; + } d_un; +} Elf64_Dyn; + +/* Dynamic Array Tags - d_tag */ +#define DT_NULL 0 /* marks end of _DYNAMIC array */ +#define DT_NEEDED 1 /* string table offset of needed lib */ +#define DT_PLTRELSZ 2 /* size of relocation entries in PLT */ +#define DT_PLTGOT 3 /* address PLT/GOT */ +#define DT_HASH 4 /* address of symbol hash table */ +#define DT_STRTAB 5 /* address of string table */ +#define DT_SYMTAB 6 /* address of symbol table */ +#define DT_RELA 7 /* address of relocation table */ +#define DT_RELASZ 8 /* size of relocation table */ +#define DT_RELAENT 9 /* size of relocation entry */ +#define DT_STRSZ 10 /* size of string table */ +#define DT_SYMENT 11 /* size of symbol table entry */ +#define DT_INIT 12 /* address of initialization func. */ +#define DT_FINI 13 /* address of termination function */ +#define DT_SONAME 14 /* string table offset of shared obj */ +#define DT_RPATH 15 /* string table offset of library + search path */ +#define DT_SYMBOLIC 16 /* start sym search in shared obj. */ +#define DT_REL 17 /* address of rel. tbl. w addends */ +#define DT_RELSZ 18 /* size of DT_REL relocation table */ +#define DT_RELENT 19 /* size of DT_REL relocation entry */ +#define DT_PLTREL 20 /* PLT referenced relocation entry */ +#define DT_DEBUG 21 /* bugger */ +#define DT_TEXTREL 22 /* Allow rel. mod. to unwritable seg */ +#define DT_JMPREL 23 /* add. of PLT's relocation entries */ +#define DT_BIND_NOW 24 /* Bind now regardless of env setting */ +#define DT_NUM 25 /* Number used. */ +#define DT_LOPROC 0x70000000 /* reserved range for processor */ +#define DT_HIPROC 0x7fffffff /* specific dynamic array tags */ + +/* Standard ELF hashing function */ +unsigned int elf_hash(const unsigned char *name); + +/* + * Note Definitions + */ +typedef struct { + Elf32_Word namesz; + Elf32_Word descsz; + Elf32_Word type; +} Elf32_Note; + +typedef struct { + Elf64_Half namesz; + Elf64_Half descsz; + Elf64_Half type; +} Elf64_Note; + + +#if defined(ELFSIZE) +#define CONCAT(x,y) __CONCAT(x,y) +#define ELFNAME(x) CONCAT(elf,CONCAT(ELFSIZE,CONCAT(_,x))) +#define ELFNAME2(x,y) CONCAT(x,CONCAT(_elf,CONCAT(ELFSIZE,CONCAT(_,y)))) +#define ELFNAMEEND(x) CONCAT(x,CONCAT(_elf,ELFSIZE)) +#define ELFDEFNNAME(x) CONCAT(ELF,CONCAT(ELFSIZE,CONCAT(_,x))) +#endif + +#if defined(ELFSIZE) && (ELFSIZE == 32) +#define Elf_Ehdr Elf32_Ehdr +#define Elf_Phdr Elf32_Phdr +#define Elf_Shdr Elf32_Shdr +#define Elf_Sym Elf32_Sym +#define Elf_Rel Elf32_Rel +#define Elf_RelA Elf32_Rela +#define Elf_Dyn Elf32_Dyn +#define Elf_Word Elf32_Word +#define Elf_Sword Elf32_Sword +#define Elf_Addr Elf32_Addr +#define Elf_Off Elf32_Off +#define Elf_Nhdr Elf32_Nhdr +#define Elf_Note Elf32_Note + +#define ELF_R_SYM ELF32_R_SYM +#define ELF_R_TYPE ELF32_R_TYPE +#define ELF_R_INFO ELF32_R_INFO +#define ELFCLASS ELFCLASS32 + +#define ELF_ST_BIND ELF32_ST_BIND +#define ELF_ST_TYPE ELF32_ST_TYPE +#define ELF_ST_INFO ELF32_ST_INFO + +#define AuxInfo Aux32Info +#elif defined(ELFSIZE) && (ELFSIZE == 64) +#define Elf_Ehdr Elf64_Ehdr +#define Elf_Phdr Elf64_Phdr +#define Elf_Shdr Elf64_Shdr +#define Elf_Sym Elf64_Sym +#define Elf_Rel Elf64_Rel +#define Elf_RelA Elf64_Rela +#define Elf_Dyn Elf64_Dyn +#define Elf_Word Elf64_Word +#define Elf_Sword Elf64_Sword +#define Elf_Addr Elf64_Addr +#define Elf_Off Elf64_Off +#define Elf_Nhdr Elf64_Nhdr +#define Elf_Note Elf64_Note + +#define ELF_R_SYM ELF64_R_SYM +#define ELF_R_TYPE ELF64_R_TYPE +#define ELF_R_INFO ELF64_R_INFO +#define ELFCLASS ELFCLASS64 + +#define ELF_ST_BIND ELF64_ST_BIND +#define ELF_ST_TYPE ELF64_ST_TYPE +#define ELF_ST_INFO ELF64_ST_INFO + +#define AuxInfo Aux64Info +#endif + +#endif /* __XEN_PUBLIC_ELFSTRUCTS_H__ */ diff --git a/xen/include/public/libelf.h b/xen/include/public/libelf.h new file mode 100644 index 0000000000..888cede187 --- /dev/null +++ b/xen/include/public/libelf.h @@ -0,0 +1,238 @@ +#ifndef __XC_LIBELF__ +#define __XC_LIBELF__ 1 + +#ifdef __XEN__ + +#include <xen/inttypes.h> +#include <public/features.h> +typedef uint64_t off_t; + +#define LITTLE_ENDIAN 1234 +#define BIG_ENDIAN 4321 +#if defined(__i386__) || defined(__x86_64) || defined(__ia64__) +#define BYTE_ORDER LITTLE_ENDIAN +#elif defined(__powerpc__) +#define BYTE_ORDER BIG_ENDIAN +#endif + +#else /* !__XEN__ */ + +#include <stddef.h> +#include <inttypes.h> + +#endif + +#undef ELFSIZE +#include "elfstructs.h" +#include "features.h" + +/* ------------------------------------------------------------------------ */ + +typedef union { + Elf32_Ehdr e32; + Elf64_Ehdr e64; +} elf_ehdr; + +typedef union { + Elf32_Phdr e32; + Elf64_Phdr e64; +} elf_phdr; + +typedef union { + Elf32_Shdr e32; + Elf64_Shdr e64; +} elf_shdr; + +typedef union { + Elf32_Sym e32; + Elf64_Sym e64; +} elf_sym; + +typedef union { + Elf32_Rel e32; + Elf64_Rel e64; +} elf_rel; + +typedef union { + Elf32_Rela e32; + Elf64_Rela e64; +} elf_rela; + +typedef union { + Elf32_Note e32; + Elf64_Note e64; +} elf_note; + +struct elf_binary { + /* elf binary */ + const char *image; + size_t size; + char class; + char data; + + const elf_ehdr *ehdr; + const char *sec_strtab; + const elf_shdr *sym_tab; + const char *sym_strtab; + + /* loaded to */ + char *dest; + uint64_t pstart; + uint64_t pend; + uint64_t reloc_offset; + +#ifndef __XEN__ + /* misc */ + FILE *log; +#endif + int verbose; +}; + +/* ------------------------------------------------------------------------ */ +/* accessing elf header fields */ + +#if !defined(BYTE_ORDER) +# error BYTE_ORDER not defined +#elif BYTE_ORDER == BIG_ENDIAN +# define NATIVE_ELFDATA ELFDATA2MSB +#elif BYTE_ORDER == LITTLE_ENDIAN +# define NATIVE_ELFDATA ELFDATA2LSB +#else +# error BYTE_ORDER unknown +#endif + +#define elf_32bit(elf) (ELFCLASS32 == (elf)->class) +#define elf_64bit(elf) (ELFCLASS64 == (elf)->class) +#define elf_msb(elf) (ELFDATA2MSB == (elf)->data) +#define elf_lsb(elf) (ELFDATA2LSB == (elf)->data) +#define elf_swap(elf) (NATIVE_ELFDATA != (elf)->data) + +#define elf_uval(elf, str, elem) \ + ((ELFCLASS64 == (elf)->class) \ + ? elf_access_unsigned((elf), (str), \ + offsetof(typeof(*(str)),e64.elem), \ + sizeof((str)->e64.elem)) \ + : elf_access_unsigned((elf), (str), \ + offsetof(typeof(*(str)),e32.elem), \ + sizeof((str)->e32.elem))) + +#define elf_sval(elf, str, elem) \ + ((ELFCLASS64 == (elf)->class) \ + ? elf_access_signed((elf), (str), \ + offsetof(typeof(*(str)),e64.elem), \ + sizeof((str)->e64.elem)) \ + : elf_access_signed((elf), (str), \ + offsetof(typeof(*(str)),e32.elem), \ + sizeof((str)->e32.elem))) + +#define elf_size(elf, str) \ + ((ELFCLASS64 == (elf)->class) \ + ? sizeof((str)->e64) \ + : sizeof((str)->e32)) + +uint64_t elf_access_unsigned(struct elf_binary *elf, const void *ptr, + off_t offset, size_t size); +int64_t elf_access_signed(struct elf_binary *elf, const void *ptr, + off_t offset, size_t size); + +uint64_t elf_round_up(struct elf_binary *elf, uint64_t addr); + +/* ------------------------------------------------------------------------ */ +/* xc_libelf_tools.c */ + +int elf_shdr_count(struct elf_binary *elf); +int elf_phdr_count(struct elf_binary *elf); + +const elf_shdr *elf_shdr_by_name(struct elf_binary *elf, const char *name); +const elf_shdr *elf_shdr_by_index(struct elf_binary *elf, int index); +const elf_phdr *elf_phdr_by_index(struct elf_binary *elf, int index); + +const char *elf_section_name(struct elf_binary *elf, const elf_shdr * shdr); +const void *elf_section_start(struct elf_binary *elf, const elf_shdr * shdr); +const void *elf_section_end(struct elf_binary *elf, const elf_shdr * shdr); + +const elf_sym *elf_sym_by_name(struct elf_binary *elf, const char *symbol); +const elf_sym *elf_sym_by_index(struct elf_binary *elf, int index); + +const char *elf_note_name(struct elf_binary *elf, const elf_note * note); +const void *elf_note_desc(struct elf_binary *elf, const elf_note * note); +uint64_t elf_note_numeric(struct elf_binary *elf, const elf_note * note); +const elf_note *elf_note_next(struct elf_binary *elf, const elf_note * note); + +int elf_is_elfbinary(const void *image); +int elf_phdr_is_loadable(struct elf_binary *elf, const elf_phdr * phdr); + +/* ------------------------------------------------------------------------ */ +/* xc_libelf_loader.c */ + +int elf_init(struct elf_binary *elf, const char *image, size_t size); +#ifdef __XEN__ +void elf_set_verbose(struct elf_binary *elf); +#else +void elf_set_logfile(struct elf_binary *elf, FILE * log, int verbose); +#endif + +void elf_parse_binary(struct elf_binary *elf); +void elf_load_binary(struct elf_binary *elf); + +void *elf_get_ptr(struct elf_binary *elf, unsigned long addr); +uint64_t elf_lookup_addr(struct elf_binary *elf, const char *symbol); + +/* ------------------------------------------------------------------------ */ +/* xc_libelf_relocate.c */ + +int elf_reloc(struct elf_binary *elf); + +/* ------------------------------------------------------------------------ */ +/* xc_libelf_dominfo.c */ + +#define UNSET_ADDR ((uint64_t)-1) + +struct elf_dom_parms { + /* raw */ + const char *guest_info; + const void *elf_note_start; + const void *elf_note_end; + + /* parsed */ + char guest_os[16]; + char guest_ver[16]; + char xen_ver[16]; + char loader[16]; + int pae; + int bsd_symtab; + uint64_t virt_base; + uint64_t virt_entry; + uint64_t virt_hypercall; + uint64_t virt_hv_start_low; + uint64_t elf_paddr_offset; + uint32_t f_supported[XENFEAT_NR_SUBMAPS]; + uint32_t f_required[XENFEAT_NR_SUBMAPS]; + + /* calculated */ + uint64_t virt_offset; + uint64_t virt_kstart; + uint64_t virt_kend; +}; + +static inline void elf_xen_feature_set(int nr, uint32_t * addr) +{ + addr[nr >> 5] |= 1 << (nr & 31); +} +static inline int elf_xen_feature_get(int nr, uint32_t * addr) +{ + return !!(addr[nr >> 5] & (1 << (nr & 31))); +} + +int elf_xen_parse_features(const char *features, + uint32_t *supported, + uint32_t *required); +int elf_xen_parse_note(struct elf_binary *elf, + struct elf_dom_parms *parms, + const elf_note *note); +int elf_xen_parse_guest_info(struct elf_binary *elf, + struct elf_dom_parms *parms); +int elf_xen_parse(struct elf_binary *elf, + struct elf_dom_parms *parms); + +#endif /* __XC_LIBELF__ */ diff --git a/xen/include/xen/elf.h b/xen/include/xen/elf.h index f8508661e6..209f4fa47e 100644 --- a/xen/include/xen/elf.h +++ b/xen/include/xen/elf.h @@ -27,495 +27,7 @@ #ifndef __XEN_ELF_H__ #define __XEN_ELF_H__ -typedef u8 Elf_Byte; - -typedef u32 Elf32_Addr; /* Unsigned program address */ -typedef u32 Elf32_Off; /* Unsigned file offset */ -typedef s32 Elf32_Sword; /* Signed large integer */ -typedef u32 Elf32_Word; /* Unsigned large integer */ -typedef u16 Elf32_Half; /* Unsigned medium integer */ - -typedef u64 Elf64_Addr; -typedef u64 Elf64_Off; -typedef s32 Elf64_Shalf; - -typedef s32 Elf64_Sword; -typedef u32 Elf64_Word; - -typedef s64 Elf64_Sxword; -typedef u64 Elf64_Xword; - -typedef u32 Elf64_Half; -typedef u16 Elf64_Quarter; - -/* - * e_ident[] identification indexes - * See http://www.caldera.com/developers/gabi/2000-07-17/ch4.eheader.html - */ -#define EI_MAG0 0 /* file ID */ -#define EI_MAG1 1 /* file ID */ -#define EI_MAG2 2 /* file ID */ -#define EI_MAG3 3 /* file ID */ -#define EI_CLASS 4 /* file class */ -#define EI_DATA 5 /* data encoding */ -#define EI_VERSION 6 /* ELF header version */ -#define EI_OSABI 7 /* OS/ABI ID */ -#define EI_ABIVERSION 8 /* ABI version */ -#define EI_PAD 9 /* start of pad bytes */ -#define EI_NIDENT 16 /* Size of e_ident[] */ - -/* e_ident[] magic number */ -#define ELFMAG0 0x7f /* e_ident[EI_MAG0] */ -#define ELFMAG1 'E' /* e_ident[EI_MAG1] */ -#define ELFMAG2 'L' /* e_ident[EI_MAG2] */ -#define ELFMAG3 'F' /* e_ident[EI_MAG3] */ -#define ELFMAG "\177ELF" /* magic */ -#define SELFMAG 4 /* size of magic */ - -/* e_ident[] file class */ -#define ELFCLASSNONE 0 /* invalid */ -#define ELFCLASS32 1 /* 32-bit objs */ -#define ELFCLASS64 2 /* 64-bit objs */ -#define ELFCLASSNUM 3 /* number of classes */ - -/* e_ident[] data encoding */ -#define ELFDATANONE 0 /* invalid */ -#define ELFDATA2LSB 1 /* Little-Endian */ -#define ELFDATA2MSB 2 /* Big-Endian */ -#define ELFDATANUM 3 /* number of data encode defines */ - -/* e_ident[] Operating System/ABI */ -#define ELFOSABI_SYSV 0 /* UNIX System V ABI */ -#define ELFOSABI_HPUX 1 /* HP-UX operating system */ -#define ELFOSABI_NETBSD 2 /* NetBSD */ -#define ELFOSABI_LINUX 3 /* GNU/Linux */ -#define ELFOSABI_HURD 4 /* GNU/Hurd */ -#define ELFOSABI_86OPEN 5 /* 86Open common IA32 ABI */ -#define ELFOSABI_SOLARIS 6 /* Solaris */ -#define ELFOSABI_MONTEREY 7 /* Monterey */ -#define ELFOSABI_IRIX 8 /* IRIX */ -#define ELFOSABI_FREEBSD 9 /* FreeBSD */ -#define ELFOSABI_TRU64 10 /* TRU64 UNIX */ -#define ELFOSABI_MODESTO 11 /* Novell Modesto */ -#define ELFOSABI_OPENBSD 12 /* OpenBSD */ -#define ELFOSABI_ARM 97 /* ARM */ -#define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */ - -/* e_ident */ -#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \ - (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \ - (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \ - (ehdr).e_ident[EI_MAG3] == ELFMAG3) - -/* ELF Header */ -typedef struct elfhdr { - unsigned char e_ident[EI_NIDENT]; /* ELF Identification */ - Elf32_Half e_type; /* object file type */ - Elf32_Half e_machine; /* machine */ - Elf32_Word e_version; /* object file version */ - Elf32_Addr e_entry; /* virtual entry point */ - Elf32_Off e_phoff; /* program header table offset */ - Elf32_Off e_shoff; /* section header table offset */ - Elf32_Word e_flags; /* processor-specific flags */ - Elf32_Half e_ehsize; /* ELF header size */ - Elf32_Half e_phentsize; /* program header entry size */ - Elf32_Half e_phnum; /* number of program header entries */ - Elf32_Half e_shentsize; /* section header entry size */ - Elf32_Half e_shnum; /* number of section header entries */ - Elf32_Half e_shstrndx; /* section header table's "section - header string table" entry offset */ -} Elf32_Ehdr; - -typedef struct { - unsigned char e_ident[EI_NIDENT]; /* Id bytes */ - Elf64_Quarter e_type; /* file type */ - Elf64_Quarter e_machine; /* machine type */ - Elf64_Half e_version; /* version number */ - Elf64_Addr e_entry; /* entry point */ - Elf64_Off e_phoff; /* Program hdr offset */ - Elf64_Off e_shoff; /* Section hdr offset */ - Elf64_Half e_flags; /* Processor flags */ - Elf64_Quarter e_ehsize; /* sizeof ehdr */ - Elf64_Quarter e_phentsize; /* Program header entry size */ - Elf64_Quarter e_phnum; /* Number of program headers */ - Elf64_Quarter e_shentsize; /* Section header entry size */ - Elf64_Quarter e_shnum; /* Number of section headers */ - Elf64_Quarter e_shstrndx; /* String table index */ -} Elf64_Ehdr; - -/* e_type */ -#define ET_NONE 0 /* No file type */ -#define ET_REL 1 /* relocatable file */ -#define ET_EXEC 2 /* executable file */ -#define ET_DYN 3 /* shared object file */ -#define ET_CORE 4 /* core file */ -#define ET_NUM 5 /* number of types */ -#define ET_LOPROC 0xff00 /* reserved range for processor */ -#define ET_HIPROC 0xffff /* specific e_type */ - -/* e_machine */ -#define EM_NONE 0 /* No Machine */ -#define EM_M32 1 /* AT&T WE 32100 */ -#define EM_SPARC 2 /* SPARC */ -#define EM_386 3 /* Intel 80386 */ -#define EM_68K 4 /* Motorola 68000 */ -#define EM_88K 5 /* Motorola 88000 */ -#define EM_486 6 /* Intel 80486 - unused? */ -#define EM_860 7 /* Intel 80860 */ -#define EM_MIPS 8 /* MIPS R3000 Big-Endian only */ -/* - * Don't know if EM_MIPS_RS4_BE, - * EM_SPARC64, EM_PARISC, - * or EM_PPC are ABI compliant - */ -#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */ -#define EM_SPARC64 11 /* SPARC v9 64-bit unoffical */ -#define EM_PARISC 15 /* HPPA */ -#define EM_SPARC32PLUS 18 /* Enhanced instruction set SPARC */ -#define EM_PPC 20 /* PowerPC */ -#define EM_PPC64 21 /* PowerPC 64-bit */ -#define EM_ARM 40 /* Advanced RISC Machines ARM */ -#define EM_ALPHA 41 /* DEC ALPHA */ -#define EM_SPARCV9 43 /* SPARC version 9 */ -#define EM_ALPHA_EXP 0x9026 /* DEC ALPHA */ -#define EM_IA_64 50 /* Intel Merced */ -#define EM_X86_64 62 /* AMD x86-64 architecture */ -#define EM_VAX 75 /* DEC VAX */ - -/* Version */ -#define EV_NONE 0 /* Invalid */ -#define EV_CURRENT 1 /* Current */ -#define EV_NUM 2 /* number of versions */ - -/* Section Header */ -typedef struct { - Elf32_Word sh_name; /* name - index into section header - string table section */ - Elf32_Word sh_type; /* type */ - Elf32_Word sh_flags; /* flags */ - Elf32_Addr sh_addr; /* address */ - Elf32_Off sh_offset; /* file offset */ - Elf32_Word sh_size; /* section size */ - Elf32_Word sh_link; /* section header table index link */ - Elf32_Word sh_info; /* extra information */ - Elf32_Word sh_addralign; /* address alignment */ - Elf32_Word sh_entsize; /* section entry size */ -} Elf32_Shdr; - -typedef struct { - Elf64_Half sh_name; /* section name */ - Elf64_Half sh_type; /* section type */ - Elf64_Xword sh_flags; /* section flags */ - Elf64_Addr sh_addr; /* virtual address */ - Elf64_Off sh_offset; /* file offset */ - Elf64_Xword sh_size; /* section size */ - Elf64_Half sh_link; /* link to another */ - Elf64_Half sh_info; /* misc info */ - Elf64_Xword sh_addralign; /* memory alignment */ - Elf64_Xword sh_entsize; /* table entry size */ -} Elf64_Shdr; - -/* Special Section Indexes */ -#define SHN_UNDEF 0 /* undefined */ -#define SHN_LORESERVE 0xff00 /* lower bounds of reserved indexes */ -#define SHN_LOPROC 0xff00 /* reserved range for processor */ -#define SHN_HIPROC 0xff1f /* specific section indexes */ -#define SHN_ABS 0xfff1 /* absolute value */ -#define SHN_COMMON 0xfff2 /* common symbol */ -#define SHN_HIRESERVE 0xffff /* upper bounds of reserved indexes */ - -/* sh_type */ -#define SHT_NULL 0 /* inactive */ -#define SHT_PROGBITS 1 /* program defined information */ -#define SHT_SYMTAB 2 /* symbol table section */ -#define SHT_STRTAB 3 /* string table section */ -#define SHT_RELA 4 /* relocation section with addends*/ -#define SHT_HASH 5 /* symbol hash table section */ -#define SHT_DYNAMIC 6 /* dynamic section */ -#define SHT_NOTE 7 /* note section */ -#define SHT_NOBITS 8 /* no space section */ -#define SHT_REL 9 /* relation section without addends */ -#define SHT_SHLIB 10 /* reserved - purpose unknown */ -#define SHT_DYNSYM 11 /* dynamic symbol table section */ -#define SHT_NUM 12 /* number of section types */ -#define SHT_LOPROC 0x70000000 /* reserved range for processor */ -#define SHT_HIPROC 0x7fffffff /* specific section header types */ -#define SHT_LOUSER 0x80000000 /* reserved range for application */ -#define SHT_HIUSER 0xffffffff /* specific indexes */ - -/* Section names */ -#define ELF_BSS ".bss" /* uninitialized data */ -#define ELF_DATA ".data" /* initialized data */ -#define ELF_DEBUG ".debug" /* debug */ -#define ELF_DYNAMIC ".dynamic" /* dynamic linking information */ -#define ELF_DYNSTR ".dynstr" /* dynamic string table */ -#define ELF_DYNSYM ".dynsym" /* dynamic symbol table */ -#define ELF_FINI ".fini" /* termination code */ -#define ELF_GOT ".got" /* global offset table */ -#define ELF_HASH ".hash" /* symbol hash table */ -#define ELF_INIT ".init" /* initialization code */ -#define ELF_REL_DATA ".rel.data" /* relocation data */ -#define ELF_REL_FINI ".rel.fini" /* relocation termination code */ -#define ELF_REL_INIT ".rel.init" /* relocation initialization code */ -#define ELF_REL_DYN ".rel.dyn" /* relocaltion dynamic link info */ -#define ELF_REL_RODATA ".rel.rodata" /* relocation read-only data */ -#define ELF_REL_TEXT ".rel.text" /* relocation code */ -#define ELF_RODATA ".rodata" /* read-only data */ -#define ELF_SHSTRTAB ".shstrtab" /* section header string table */ -#define ELF_STRTAB ".strtab" /* string table */ -#define ELF_SYMTAB ".symtab" /* symbol table */ -#define ELF_TEXT ".text" /* code */ - - -/* Section Attribute Flags - sh_flags */ -#define SHF_WRITE 0x1 /* Writable */ -#define SHF_ALLOC 0x2 /* occupies memory */ -#define SHF_EXECINSTR 0x4 /* executable */ -#define SHF_MASKPROC 0xf0000000 /* reserved bits for processor */ - /* specific section attributes */ - -/* Symbol Table Entry */ -typedef struct elf32_sym { - Elf32_Word st_name; /* name - index into string table */ - Elf32_Addr st_value; /* symbol value */ - Elf32_Word st_size; /* symbol size */ - unsigned char st_info; /* type and binding */ - unsigned char st_other; /* 0 - no defined meaning */ - Elf32_Half st_shndx; /* section header index */ -} Elf32_Sym; - -typedef struct { - Elf64_Half st_name; /* Symbol name index in str table */ - Elf_Byte st_info; /* type / binding attrs */ - Elf_Byte st_other; /* unused */ - Elf64_Quarter st_shndx; /* section index of symbol */ - Elf64_Xword st_value; /* value of symbol */ - Elf64_Xword st_size; /* size of symbol */ -} Elf64_Sym; - -/* Symbol table index */ -#define STN_UNDEF 0 /* undefined */ - -/* Extract symbol info - st_info */ -#define ELF32_ST_BIND(x) ((x) >> 4) -#define ELF32_ST_TYPE(x) (((unsigned int) x) & 0xf) -#define ELF32_ST_INFO(b,t) (((b) << 4) + ((t) & 0xf)) - -#define ELF64_ST_BIND(x) ((x) >> 4) -#define ELF64_ST_TYPE(x) (((unsigned int) x) & 0xf) -#define ELF64_ST_INFO(b,t) (((b) << 4) + ((t) & 0xf)) - -/* Symbol Binding - ELF32_ST_BIND - st_info */ -#define STB_LOCAL 0 /* Local symbol */ -#define STB_GLOBAL 1 /* Global symbol */ -#define STB_WEAK 2 /* like global - lower precedence */ -#define STB_NUM 3 /* number of symbol bindings */ -#define STB_LOPROC 13 /* reserved range for processor */ -#define STB_HIPROC 15 /* specific symbol bindings */ - -/* Symbol type - ELF32_ST_TYPE - st_info */ -#define STT_NOTYPE 0 /* not specified */ -#define STT_OBJECT 1 /* data object */ -#define STT_FUNC 2 /* function */ -#define STT_SECTION 3 /* section */ -#define STT_FILE 4 /* file */ -#define STT_NUM 5 /* number of symbol types */ -#define STT_LOPROC 13 /* reserved range for processor */ -#define STT_HIPROC 15 /* specific symbol types */ - -/* Relocation entry with implicit addend */ -typedef struct { - Elf32_Addr r_offset; /* offset of relocation */ - Elf32_Word r_info; /* symbol table index and type */ -} Elf32_Rel; - -/* Relocation entry with explicit addend */ -typedef struct { - Elf32_Addr r_offset; /* offset of relocation */ - Elf32_Word r_info; /* symbol table index and type */ - Elf32_Sword r_addend; -} Elf32_Rela; - -/* Extract relocation info - r_info */ -#define ELF32_R_SYM(i) ((i) >> 8) -#define ELF32_R_TYPE(i) ((unsigned char) (i)) -#define ELF32_R_INFO(s,t) (((s) << 8) + (unsigned char)(t)) - -typedef struct { - Elf64_Xword r_offset; /* where to do it */ - Elf64_Xword r_info; /* index & type of relocation */ -} Elf64_Rel; - -typedef struct { - Elf64_Xword r_offset; /* where to do it */ - Elf64_Xword r_info; /* index & type of relocation */ - Elf64_Sxword r_addend; /* adjustment value */ -} Elf64_Rela; - -#define ELF64_R_SYM(info) ((info) >> 32) -#define ELF64_R_TYPE(info) ((info) & 0xFFFFFFFF) -#define ELF64_R_INFO(s,t) (((s) << 32) + (u32)(t)) - -/* Program Header */ -typedef struct { - Elf32_Word p_type; /* segment type */ - Elf32_Off p_offset; /* segment offset */ - Elf32_Addr p_vaddr; /* virtual address of segment */ - Elf32_Addr p_paddr; /* physical address - ignored? */ - Elf32_Word p_filesz; /* number of bytes in file for seg. */ - Elf32_Word p_memsz; /* number of bytes in mem. for seg. */ - Elf32_Word p_flags; /* flags */ - Elf32_Word p_align; /* memory alignment */ -} Elf32_Phdr; - -typedef struct { - Elf64_Half p_type; /* entry type */ - Elf64_Half p_flags; /* flags */ - Elf64_Off p_offset; /* offset */ - Elf64_Addr p_vaddr; /* virtual address */ - Elf64_Addr p_paddr; /* physical address */ - Elf64_Xword p_filesz; /* file size */ - Elf64_Xword p_memsz; /* memory size */ - Elf64_Xword p_align; /* memory & file alignment */ -} Elf64_Phdr; - -/* Segment types - p_type */ -#define PT_NULL 0 /* unused */ -#define PT_LOAD 1 /* loadable segment */ -#define PT_DYNAMIC 2 /* dynamic linking section */ -#define PT_INTERP 3 /* the RTLD */ -#define PT_NOTE 4 /* auxiliary information */ -#define PT_SHLIB 5 /* reserved - purpose undefined */ -#define PT_PHDR 6 /* program header */ -#define PT_NUM 7 /* Number of segment types */ -#define PT_LOPROC 0x70000000 /* reserved range for processor */ -#define PT_HIPROC 0x7fffffff /* specific segment types */ - -/* Segment flags - p_flags */ -#define PF_X 0x1 /* Executable */ -#define PF_W 0x2 /* Writable */ -#define PF_R 0x4 /* Readable */ -#define PF_MASKPROC 0xf0000000 /* reserved bits for processor */ - /* specific segment flags */ - -/* Dynamic structure */ -typedef struct { - Elf32_Sword d_tag; /* controls meaning of d_val */ - union { - Elf32_Word d_val; /* Multiple meanings - see d_tag */ - Elf32_Addr d_ptr; /* program virtual address */ - } d_un; -} Elf32_Dyn; - -typedef struct { - Elf64_Xword d_tag; /* controls meaning of d_val */ - union { - Elf64_Addr d_ptr; - Elf64_Xword d_val; - } d_un; -} Elf64_Dyn; - -/* Dynamic Array Tags - d_tag */ -#define DT_NULL 0 /* marks end of _DYNAMIC array */ -#define DT_NEEDED 1 /* string table offset of needed lib */ -#define DT_PLTRELSZ 2 /* size of relocation entries in PLT */ -#define DT_PLTGOT 3 /* address PLT/GOT */ -#define DT_HASH 4 /* address of symbol hash table */ -#define DT_STRTAB 5 /* address of string table */ -#define DT_SYMTAB 6 /* address of symbol table */ -#define DT_RELA 7 /* address of relocation table */ -#define DT_RELASZ 8 /* size of relocation table */ -#define DT_RELAENT 9 /* size of relocation entry */ -#define DT_STRSZ 10 /* size of string table */ -#define DT_SYMENT 11 /* size of symbol table entry */ -#define DT_INIT 12 /* address of initialization func. */ -#define DT_FINI 13 /* address of termination function */ -#define DT_SONAME 14 /* string table offset of shared obj */ -#define DT_RPATH 15 /* string table offset of library - search path */ -#define DT_SYMBOLIC 16 /* start sym search in shared obj. */ -#define DT_REL 17 /* address of rel. tbl. w addends */ -#define DT_RELSZ 18 /* size of DT_REL relocation table */ -#define DT_RELENT 19 /* size of DT_REL relocation entry */ -#define DT_PLTREL 20 /* PLT referenced relocation entry */ -#define DT_DEBUG 21 /* bugger */ -#define DT_TEXTREL 22 /* Allow rel. mod. to unwritable seg */ -#define DT_JMPREL 23 /* add. of PLT's relocation entries */ -#define DT_BIND_NOW 24 /* Bind now regardless of env setting */ -#define DT_NUM 25 /* Number used. */ -#define DT_LOPROC 0x70000000 /* reserved range for processor */ -#define DT_HIPROC 0x7fffffff /* specific dynamic array tags */ - -/* Standard ELF hashing function */ -unsigned int elf_hash(const unsigned char *name); - -/* - * Note Definitions - */ - -typedef struct { - u32 namesz; - u32 descsz; - u32 type; -} Elf_Note; /* same format for both 32-bit and 64-bit ELF */ - -#if defined(ELFSIZE) -#define CONCAT(x,y) __CONCAT(x,y) -#define ELFNAME(x) CONCAT(elf,CONCAT(ELFSIZE,CONCAT(_,x))) -#define ELFNAME2(x,y) CONCAT(x,CONCAT(_elf,CONCAT(ELFSIZE,CONCAT(_,y)))) -#define ELFNAMEEND(x) CONCAT(x,CONCAT(_elf,ELFSIZE)) -#define ELFDEFNNAME(x) CONCAT(ELF,CONCAT(ELFSIZE,CONCAT(_,x))) -#endif - -#if defined(ELFSIZE) && (ELFSIZE == 32) -#define Elf_Ehdr Elf32_Ehdr -#define Elf_Phdr Elf32_Phdr -#define Elf_Shdr Elf32_Shdr -#define Elf_Sym Elf32_Sym -#define Elf_Rel Elf32_Rel -#define Elf_RelA Elf32_Rela -#define Elf_Dyn Elf32_Dyn -#define Elf_Word Elf32_Word -#define Elf_Sword Elf32_Sword -#define Elf_Addr Elf32_Addr -#define Elf_Off Elf32_Off -#define Elf_Nhdr Elf32_Nhdr - -#define ELF_R_SYM ELF32_R_SYM -#define ELF_R_TYPE ELF32_R_TYPE -#define ELF_R_INFO ELF32_R_INFO -#define ELFCLASS ELFCLASS32 - -#define ELF_ST_BIND ELF32_ST_BIND -#define ELF_ST_TYPE ELF32_ST_TYPE -#define ELF_ST_INFO ELF32_ST_INFO - -#define AuxInfo Aux32Info -#elif defined(ELFSIZE) && (ELFSIZE == 64) -#define Elf_Ehdr Elf64_Ehdr -#define Elf_Phdr Elf64_Phdr -#define Elf_Shdr Elf64_Shdr -#define Elf_Sym Elf64_Sym -#define Elf_Rel Elf64_Rel -#define Elf_RelA Elf64_Rela -#define Elf_Dyn Elf64_Dyn -#define Elf_Word Elf64_Word -#define Elf_Sword Elf64_Sword -#define Elf_Addr Elf64_Addr -#define Elf_Off Elf64_Off -#define Elf_Nhdr Elf64_Nhdr - -#define ELF_R_SYM ELF64_R_SYM -#define ELF_R_TYPE ELF64_R_TYPE -#define ELF_R_INFO ELF64_R_INFO -#define ELFCLASS ELFCLASS64 - -#define ELF_ST_BIND ELF64_ST_BIND -#define ELF_ST_TYPE ELF64_ST_TYPE -#define ELF_ST_INFO ELF64_ST_INFO - -#define AuxInfo Aux64Info -#endif +#include <public/elfstructs.h> #define ELFNOTE_ALIGN(_n_) (((_n_)+3)&~3) #define ELFNOTE_NAME(_n_) ((char*)(_n_) + sizeof(*(_n_))) |