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-rw-r--r--tools/libxc/xc_netbsd_build.c705
1 files changed, 705 insertions, 0 deletions
diff --git a/tools/libxc/xc_netbsd_build.c b/tools/libxc/xc_netbsd_build.c
new file mode 100644
index 0000000000..04a47b5068
--- /dev/null
+++ b/tools/libxc/xc_netbsd_build.c
@@ -0,0 +1,705 @@
+/******************************************************************************
+ * xc_netbsd_build.c
+ */
+
+#include "xc_private.h"
+#define ELFSIZE 32 /* XXX */
+#include "xc_elf.h"
+#include <zlib.h>
+
+#ifdef DEBUG
+#define DPRINTF(x) printf x
+#else
+#define DPRINTF(x)
+#endif
+
+static int loadelfimage(gzFile, int, unsigned long *, unsigned long,
+ unsigned long *, unsigned long *,
+ unsigned long *, unsigned long *);
+
+#define ELFROUND (ELFSIZE / 8)
+
+#define L1_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED)
+#define L2_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_DIRTY|_PAGE_USER)
+
+static long get_tot_pages(int xc_handle, u32 domid)
+{
+ dom0_op_t op;
+ op.cmd = DOM0_GETDOMAININFO;
+ op.u.getdomaininfo.domain = (domid_t)domid;
+ op.u.getdomaininfo.ctxt = NULL;
+ return (do_dom0_op(xc_handle, &op) < 0) ?
+ -1 : op.u.getdomaininfo.tot_pages;
+}
+
+static int get_pfn_list(int xc_handle,
+ u32 domid,
+ unsigned long *pfn_buf,
+ unsigned long max_pfns)
+{
+ dom0_op_t op;
+ int ret;
+ op.cmd = DOM0_GETMEMLIST;
+ op.u.getmemlist.domain = (domid_t)domid;
+ op.u.getmemlist.max_pfns = max_pfns;
+ op.u.getmemlist.buffer = pfn_buf;
+
+ if ( mlock(pfn_buf, max_pfns * sizeof(unsigned long)) != 0 )
+ return -1;
+
+ ret = do_dom0_op(xc_handle, &op);
+
+ (void)munlock(pfn_buf, max_pfns * sizeof(unsigned long));
+
+ return (ret < 0) ? -1 : op.u.getmemlist.num_pfns;
+}
+
+static int setup_guestos(int xc_handle,
+ u32 dom,
+ gzFile kernel_gfd,
+ unsigned long tot_pages,
+ unsigned long *virt_startinfo_addr,
+ unsigned long *virt_load_addr,
+ full_execution_context_t *ctxt,
+ const char *cmdline,
+ unsigned long shared_info_frame,
+ unsigned int control_evtchn)
+{
+ l1_pgentry_t *vl1tab=NULL, *vl1e=NULL;
+ l2_pgentry_t *vl2tab=NULL, *vl2e=NULL;
+ unsigned long *page_array = NULL;
+ int alloc_index, num_pt_pages;
+ unsigned long l2tab;
+ unsigned long l1tab;
+ unsigned long count, pt_start;
+ unsigned long symtab_addr = 0, symtab_len = 0;
+ extended_start_info_t *start_info;
+ shared_info_t *shared_info;
+ unsigned long ksize;
+ mmu_t *mmu = NULL;
+ int pm_handle, i;
+
+ if ( (pm_handle = init_pfn_mapper((domid_t)dom)) < 0 )
+ goto error_out;
+
+ if ( (page_array = malloc(tot_pages * sizeof(unsigned long))) == NULL )
+ {
+ PERROR("Could not allocate memory");
+ goto error_out;
+ }
+
+ if ( get_pfn_list(xc_handle, dom, page_array, tot_pages) != tot_pages )
+ {
+ PERROR("Could not get the page frame list");
+ goto error_out;
+ }
+
+ if (loadelfimage(kernel_gfd, pm_handle, page_array, tot_pages,
+ virt_load_addr, &ksize, &symtab_addr, &symtab_len))
+ goto error_out;
+
+ /* ksize is kernel-image size rounded up to a page boundary. */
+
+ alloc_index = tot_pages - 1;
+
+ /* Count bottom-level PTs, rounding up. */
+ num_pt_pages = (l1_table_offset(*virt_load_addr) + tot_pages + 1023)
+ / 1024;
+
+ /* We must also count the page directory. */
+ num_pt_pages++;
+
+ /* Index of first PT page. */
+ pt_start = tot_pages - num_pt_pages;
+
+ /*
+ * First allocate page for page dir. Allocation goes backwards from the end
+ * of the allocated physical address space.
+ */
+ l2tab = page_array[alloc_index] << PAGE_SHIFT;
+ alloc_index--;
+ ctxt->pt_base = l2tab;
+
+ if ( (mmu = init_mmu_updates(xc_handle, dom)) == NULL )
+ goto error_out;
+
+ /* Initialise the page tables. */
+ if ( (vl2tab = map_pfn_writeable(pm_handle, l2tab >> PAGE_SHIFT)) == NULL )
+ goto error_out;
+ memset(vl2tab, 0, PAGE_SIZE);
+ vl2e = &vl2tab[l2_table_offset(*virt_load_addr)];
+ for ( count = 0; count < tot_pages; count++ )
+ {
+ if ( ((unsigned long)vl1e & (PAGE_SIZE-1)) == 0 )
+ {
+ l1tab = page_array[alloc_index--] << PAGE_SHIFT;
+ if ( vl1tab != NULL )
+ unmap_pfn(pm_handle, vl1tab);
+ if ( (vl1tab = map_pfn_writeable(pm_handle,
+ l1tab >> PAGE_SHIFT)) == NULL )
+ goto error_out;
+ memset(vl1tab, 0, PAGE_SIZE);
+ vl1e = &vl1tab[l1_table_offset(*virt_load_addr +
+ (count<<PAGE_SHIFT))];
+ *vl2e++ = l1tab | L2_PROT;
+ }
+
+ *vl1e = (page_array[count] << PAGE_SHIFT) | L1_PROT;
+ if ( count >= pt_start )
+ *vl1e &= ~_PAGE_RW;
+ vl1e++;
+
+ if ( add_mmu_update(xc_handle, mmu,
+ (page_array[count] << PAGE_SHIFT) |
+ MMU_MACHPHYS_UPDATE, count) )
+ goto error_out;
+ }
+ unmap_pfn(pm_handle, vl1tab);
+ unmap_pfn(pm_handle, vl2tab);
+
+ /*
+ * Pin down l2tab addr as page dir page - causes hypervisor to provide
+ * correct protection for the page
+ */
+ if ( add_mmu_update(xc_handle, mmu,
+ l2tab | MMU_EXTENDED_COMMAND, MMUEXT_PIN_L2_TABLE) )
+ goto error_out;
+
+ *virt_startinfo_addr =
+ *virt_load_addr + ((alloc_index-1) << PAGE_SHIFT);
+
+ start_info = map_pfn_writeable(pm_handle, page_array[alloc_index-1]);
+ memset(start_info, 0, sizeof(*start_info));
+ start_info->pt_base = *virt_load_addr + ((tot_pages-1) << PAGE_SHIFT);
+ start_info->mod_start = symtab_addr;
+ start_info->mod_len = symtab_len;
+ start_info->nr_pages = tot_pages;
+ start_info->shared_info = shared_info_frame << PAGE_SHIFT;
+ start_info->flags = 0;
+ start_info->domain_controller_evtchn = control_evtchn;
+ strncpy(start_info->cmd_line, cmdline, MAX_CMDLINE);
+ start_info->cmd_line[MAX_CMDLINE-1] = '\0';
+ unmap_pfn(pm_handle, start_info);
+
+ /* shared_info page starts its life empty. */
+ shared_info = map_pfn_writeable(pm_handle, shared_info_frame);
+ memset(shared_info, 0, PAGE_SIZE);
+ /* Mask all upcalls... */
+ for ( i = 0; i < MAX_VIRT_CPUS; i++ )
+ shared_info->vcpu_data[i].evtchn_upcall_mask = 1;
+ unmap_pfn(pm_handle, shared_info);
+
+ /* Send the page update requests down to the hypervisor. */
+ if ( finish_mmu_updates(xc_handle, mmu) )
+ goto error_out;
+
+ free(mmu);
+ (void)close_pfn_mapper(pm_handle);
+ free(page_array);
+ return 0;
+
+ error_out:
+ if ( mmu != NULL )
+ free(mmu);
+ if ( pm_handle >= 0 )
+ (void)close_pfn_mapper(pm_handle);
+ if ( page_array == NULL )
+ free(page_array);
+ return -1;
+}
+
+int xc_netbsd_build(int xc_handle,
+ u32 domid,
+ const char *image_name,
+ const char *cmdline,
+ unsigned int control_evtchn)
+{
+ dom0_op_t launch_op, op;
+ unsigned long load_addr;
+ long tot_pages;
+ int kernel_fd = -1;
+ gzFile kernel_gfd = NULL;
+ int rc, i;
+ full_execution_context_t st_ctxt, *ctxt = &st_ctxt;
+ unsigned long virt_startinfo_addr;
+
+ if ( (tot_pages = get_tot_pages(xc_handle, domid)) < 0 )
+ {
+ PERROR("Could not find total pages for domain");
+ return 1;
+ }
+
+ kernel_fd = open(image_name, O_RDONLY);
+ if ( kernel_fd < 0 )
+ {
+ PERROR("Could not open kernel image");
+ return 1;
+ }
+
+ if ( (kernel_gfd = gzdopen(kernel_fd, "rb")) == NULL )
+ {
+ PERROR("Could not allocate decompression state for state file");
+ close(kernel_fd);
+ return 1;
+ }
+
+ if ( mlock(&st_ctxt, sizeof(st_ctxt) ) )
+ {
+ PERROR("Unable to mlock ctxt");
+ return 1;
+ }
+
+ op.cmd = DOM0_GETDOMAININFO;
+ op.u.getdomaininfo.domain = (domid_t)domid;
+ op.u.getdomaininfo.ctxt = ctxt;
+ if ( (do_dom0_op(xc_handle, &op) < 0) ||
+ ((u32)op.u.getdomaininfo.domain != domid) )
+ {
+ PERROR("Could not get info on domain");
+ goto error_out;
+ }
+ if ( !(op.u.getdomaininfo.flags & DOMFLAGS_PAUSED) ||
+ (op.u.getdomaininfo.ctxt->pt_base != 0) )
+ {
+ ERROR("Domain is already constructed");
+ goto error_out;
+ }
+
+ if ( setup_guestos(xc_handle, domid, kernel_gfd, tot_pages,
+ &virt_startinfo_addr,
+ &load_addr, &st_ctxt, cmdline,
+ op.u.getdomaininfo.shared_info_frame,
+ control_evtchn) < 0 )
+ {
+ ERROR("Error constructing guest OS");
+ goto error_out;
+ }
+
+ if ( kernel_fd >= 0 )
+ close(kernel_fd);
+ if( kernel_gfd )
+ gzclose(kernel_gfd);
+
+ ctxt->flags = 0;
+
+ /*
+ * Initial register values:
+ * DS,ES,FS,GS = FLAT_GUESTOS_DS
+ * CS:EIP = FLAT_GUESTOS_CS:start_pc
+ * SS:ESP = FLAT_GUESTOS_DS:start_stack
+ * ESI = start_info
+ * [EAX,EBX,ECX,EDX,EDI,EBP are zero]
+ * EFLAGS = IF | 2 (bit 1 is reserved and should always be 1)
+ */
+ ctxt->cpu_ctxt.ds = FLAT_GUESTOS_DS;
+ ctxt->cpu_ctxt.es = FLAT_GUESTOS_DS;
+ ctxt->cpu_ctxt.fs = FLAT_GUESTOS_DS;
+ ctxt->cpu_ctxt.gs = FLAT_GUESTOS_DS;
+ ctxt->cpu_ctxt.ss = FLAT_GUESTOS_DS;
+ ctxt->cpu_ctxt.cs = FLAT_GUESTOS_CS;
+ ctxt->cpu_ctxt.eip = load_addr;
+ ctxt->cpu_ctxt.esp = virt_startinfo_addr;
+ ctxt->cpu_ctxt.esi = virt_startinfo_addr;
+ ctxt->cpu_ctxt.eflags = (1<<9) | (1<<2);
+
+ /* FPU is set up to default initial state. */
+ memset(ctxt->fpu_ctxt, 0, sizeof(ctxt->fpu_ctxt));
+
+ /* Virtual IDT is empty at start-of-day. */
+ for ( i = 0; i < 256; i++ )
+ {
+ ctxt->trap_ctxt[i].vector = i;
+ ctxt->trap_ctxt[i].cs = FLAT_GUESTOS_CS;
+ }
+ ctxt->fast_trap_idx = 0;
+
+ /* No LDT. */
+ ctxt->ldt_ents = 0;
+
+ /* Use the default Xen-provided GDT. */
+ ctxt->gdt_ents = 0;
+
+ /* Ring 1 stack is the initial stack. */
+ ctxt->guestos_ss = FLAT_GUESTOS_DS;
+ ctxt->guestos_esp = virt_startinfo_addr;
+
+ /* No debugging. */
+ memset(ctxt->debugreg, 0, sizeof(ctxt->debugreg));
+
+ /* No callback handlers. */
+ ctxt->event_callback_cs = FLAT_GUESTOS_CS;
+ ctxt->event_callback_eip = 0;
+ ctxt->failsafe_callback_cs = FLAT_GUESTOS_CS;
+ ctxt->failsafe_callback_eip = 0;
+
+ memset( &launch_op, 0, sizeof(launch_op) );
+
+ launch_op.u.builddomain.domain = (domid_t)domid;
+ launch_op.u.builddomain.ctxt = ctxt;
+ launch_op.cmd = DOM0_BUILDDOMAIN;
+ rc = do_dom0_op(xc_handle, &launch_op);
+
+ return rc;
+
+ error_out:
+ if ( kernel_fd >= 0 )
+ close(kernel_fd);
+ if( kernel_gfd )
+ gzclose(kernel_gfd);
+
+ return -1;
+}
+
+#define MYSEEK_BUFSIZE 1024
+static off_t
+myseek(gzFile gfd, off_t offset, int whence)
+{
+ unsigned char tmp[MYSEEK_BUFSIZE];
+ int c;
+
+ if ( offset < 0 )
+ {
+ ERROR("seek back not supported");
+ return -1;
+ }
+
+ while ( offset != 0 )
+ {
+ c = offset;
+ if ( c > MYSEEK_BUFSIZE )
+ c = MYSEEK_BUFSIZE;
+ if ( gzread(gfd, tmp, c) != c )
+ {
+ PERROR("Error seeking in image.");
+ return -1;
+ }
+ offset -= c;
+ }
+
+ return 0; /* XXX */
+}
+
+/*
+ * NetBSD memory layout:
+ *
+ * ---------------- *virt_load_addr = ehdr.e_entry (0xc0100000)
+ * | kernel text |
+ * | |
+ * ----------------
+ * | kernel data |
+ * | |
+ * ----------------
+ * | kernel bss |
+ * | |
+ * ---------------- *symtab_addr
+ * | symtab size | = *symtab_len
+ * ----------------
+ * | elf header | offsets to symbol sections mangled to be relative
+ * | | to headers location
+ * ----------------
+ * | sym section |
+ * | headers |
+ * ----------------
+ * | sym sections |
+ * | |
+ * ---------------- *symtab_addr + *symtab_len
+ * | padding |
+ * ---------------- ehdr.e_entry + *ksize << PAGE_SHIFT
+ */
+
+#define IS_TEXT(p) (p.p_flags & PF_X)
+#define IS_DATA(p) (p.p_flags & PF_W)
+#define IS_BSS(p) (p.p_filesz < p.p_memsz)
+
+static int
+loadelfimage(gzFile kernel_gfd, int pm_handle, unsigned long *page_array,
+ unsigned long tot_pages, unsigned long *virt_load_addr,
+ unsigned long *ksize, unsigned long *symtab_addr,
+ unsigned long *symtab_len)
+{
+ Elf_Ehdr ehdr;
+ Elf_Phdr *phdr;
+ Elf_Shdr *shdr;
+ void *vaddr;
+ char page[PAGE_SIZE], *p;
+ unsigned long iva, maxva, symva;
+ int c, curpos, h, i, ret, s;
+
+ ret = -1;
+ phdr = NULL;
+ p = NULL;
+ maxva = 0;
+
+ if ( gzread(kernel_gfd, &ehdr, sizeof(Elf_Ehdr)) != sizeof(Elf_Ehdr) )
+ {
+ PERROR("Error reading kernel image ELF header.");
+ goto out;
+ }
+ curpos = sizeof(Elf_Ehdr);
+
+ if ( !IS_ELF(ehdr) )
+ {
+ PERROR("Image does not have an ELF header.");
+ goto out;
+ }
+
+ *virt_load_addr = ehdr.e_entry;
+
+ if ( (*virt_load_addr & (PAGE_SIZE-1)) != 0 )
+ {
+ ERROR("We can only deal with page-aligned load addresses");
+ goto out;
+ }
+
+ if ( (*virt_load_addr + (tot_pages << PAGE_SHIFT)) >
+ HYPERVISOR_VIRT_START )
+ {
+ ERROR("Cannot map all domain memory without hitting Xen space");
+ goto out;
+ }
+
+
+ phdr = malloc(ehdr.e_phnum * sizeof(Elf_Phdr));
+ if ( phdr == NULL )
+ {
+ ERROR("Cannot allocate memory for Elf_Phdrs");
+ goto out;
+ }
+
+ if ( myseek(kernel_gfd, ehdr.e_phoff - curpos, SEEK_SET) == -1 )
+ {
+ ERROR("Seek to program header failed");
+ goto out;
+ }
+ curpos = ehdr.e_phoff;
+
+ if ( gzread(kernel_gfd, phdr, ehdr.e_phnum * sizeof(Elf_Phdr)) !=
+ ehdr.e_phnum * sizeof(Elf_Phdr) )
+ {
+ PERROR("Error reading kernel image ELF program header.");
+ goto out;
+ }
+ curpos += ehdr.e_phnum * sizeof(Elf_Phdr);
+
+ /* Copy run-time 'load' segments that are writeable and/or executable. */
+ for ( h = 0; h < ehdr.e_phnum; h++ )
+ {
+ if ( (phdr[h].p_type != PT_LOAD) ||
+ ((phdr[h].p_flags & (PF_W|PF_X)) == 0) )
+ continue;
+
+ if ( IS_TEXT(phdr[h]) || IS_DATA(phdr[h]) )
+ {
+ if ( myseek(kernel_gfd, phdr[h].p_offset - curpos,
+ SEEK_SET) == -1 )
+ {
+ ERROR("Seek to section failed");
+ goto out;
+ }
+ curpos = phdr[h].p_offset;
+
+ for ( iva = phdr[h].p_vaddr;
+ iva < phdr[h].p_vaddr + phdr[h].p_filesz;
+ iva += c)
+ {
+ c = PAGE_SIZE - (iva & (PAGE_SIZE - 1));
+ if (iva + c > phdr[h].p_vaddr + phdr[h].p_filesz)
+ c = phdr[h].p_vaddr + phdr[h].p_filesz - iva;
+ if ( gzread(kernel_gfd, page, c) != c )
+ {
+ PERROR("Error reading kernel image page.");
+ goto out;
+ }
+ curpos += c;
+ vaddr = map_pfn_writeable(pm_handle,
+ page_array[(iva - *virt_load_addr)
+ >> PAGE_SHIFT]);
+ if ( vaddr == NULL )
+ {
+ ERROR("Couldn't map guest memory");
+ goto out;
+ }
+ DPRINTF(("copy page %p to %p, count 0x%x\n", (void *)iva,
+ vaddr + (iva & (PAGE_SIZE - 1)), c));
+ memcpy(vaddr + (iva & (PAGE_SIZE - 1)), page, c);
+ unmap_pfn(pm_handle, vaddr);
+ }
+
+ if ( phdr[h].p_vaddr + phdr[h].p_filesz > maxva )
+ maxva = phdr[h].p_vaddr + phdr[h].p_filesz;
+ }
+
+ if ( IS_BSS(phdr[h]) )
+ {
+ /* XXX maybe clear phdr[h].p_memsz bytes from
+ phdr[h].p_vaddr + phdr[h].p_filesz ??? */
+ if (phdr[h].p_vaddr + phdr[h].p_memsz > maxva)
+ maxva = phdr[h].p_vaddr + phdr[h].p_memsz;
+ DPRINTF(("bss from %p to %p, maxva %p\n",
+ (void *)(phdr[h].p_vaddr + phdr[h].p_filesz),
+ (void *)(phdr[h].p_vaddr + phdr[h].p_memsz),
+ (void *)maxva));
+ }
+ }
+
+ p = malloc(sizeof(int) + sizeof(Elf_Ehdr) +
+ ehdr.e_shnum * sizeof(Elf_Shdr));
+ if ( p == NULL )
+ {
+ ERROR("Cannot allocate memory for Elf_Shdrs");
+ goto out;
+ }
+
+ shdr = (Elf_Shdr *)(p + sizeof(int) + sizeof(Elf_Ehdr));
+
+ if ( myseek(kernel_gfd, ehdr.e_shoff - curpos, SEEK_SET) == -1 )
+ {
+ ERROR("Seek to symbol header failed");
+ goto out;
+ }
+ curpos = ehdr.e_shoff;
+
+ if ( gzread(kernel_gfd, shdr, ehdr.e_shnum * sizeof(Elf_Shdr)) !=
+ ehdr.e_shnum * sizeof(Elf_Shdr) )
+ {
+ PERROR("Error reading kernel image ELF symbol header.");
+ goto out;
+ }
+ curpos += ehdr.e_shnum * sizeof(Elf_Shdr);
+
+ maxva = (maxva + ELFROUND - 1) & ~(ELFROUND - 1);
+ symva = maxva;
+ maxva += sizeof(int);
+ *symtab_addr = maxva;
+ *symtab_len = 0;
+ maxva += sizeof(Elf_Ehdr) + ehdr.e_shnum * sizeof(Elf_Shdr);
+ maxva = (maxva + ELFROUND - 1) & ~(ELFROUND - 1);
+
+ /* Copy kernel string / symbol tables into physical memory */
+ for ( h = 0; h < ehdr.e_shnum; h++ )
+ {
+ if ( shdr[h].sh_type == SHT_STRTAB )
+ {
+ /* Look for a strtab @i linked to symtab @h. */
+ for ( i = 0; i < ehdr.e_shnum; i++ )
+ if ( (shdr[i].sh_type == SHT_SYMTAB) &&
+ (shdr[i].sh_link == h) )
+ break;
+ /* Skip symtab @h if we found no corresponding strtab @i. */
+ if ( i == ehdr.e_shnum )
+ {
+ shdr[h].sh_offset = 0;
+ continue;
+ }
+ }
+
+ if ( (shdr[h].sh_type == SHT_STRTAB) ||
+ (shdr[h].sh_type == SHT_SYMTAB) )
+ {
+ if ( myseek(kernel_gfd, shdr[h].sh_offset - curpos,
+ SEEK_SET) == -1 )
+ {
+ ERROR("Seek to symbol section failed");
+ goto out;
+ }
+ curpos = shdr[h].sh_offset;
+
+ /* Mangled to be based on ELF header location. */
+ shdr[h].sh_offset = maxva - *symtab_addr;
+
+ DPRINTF(("copy section %d, size 0x%x\n", h, shdr[h].sh_size));
+ for ( i = 0; i < shdr[h].sh_size; i += c, maxva += c )
+ {
+ c = PAGE_SIZE - (maxva & (PAGE_SIZE - 1));
+ if ( c > (shdr[h].sh_size - i) )
+ c = shdr[h].sh_size - i;
+ if ( gzread(kernel_gfd, page, c) != c )
+ {
+ PERROR("Error reading kernel image page.");
+ goto out;
+ }
+ curpos += c;
+
+ vaddr = map_pfn_writeable(pm_handle,
+ page_array[(maxva - *virt_load_addr)
+ >> PAGE_SHIFT]);
+ if ( vaddr == NULL )
+ {
+ ERROR("Couldn't map guest memory");
+ goto out;
+ }
+ DPRINTF(("copy page %p to %p, count 0x%x\n", (void *)maxva,
+ vaddr + (maxva & (PAGE_SIZE - 1)), c));
+ memcpy(vaddr + (maxva & (PAGE_SIZE - 1)), page, c);
+ unmap_pfn(pm_handle, vaddr);
+ }
+
+ *symtab_len += shdr[h].sh_size;
+ maxva = (maxva + ELFROUND - 1) & ~(ELFROUND - 1);
+
+ }
+ shdr[h].sh_name = 0; /* Name is NULL. */
+ }
+
+ if ( *symtab_len == 0 )
+ {
+ DPRINTF(("no symbol table\n"));
+ *symtab_addr = 0;
+ ret = 0;
+ goto out;
+ }
+
+ DPRINTF(("sym header va %p from %p/%p size %x/%x\n", (void *)symva,
+ shdr, p, ehdr.e_shnum * sizeof(Elf_Shdr),
+ ehdr.e_shnum * sizeof(Elf_Shdr) + sizeof(Elf_Ehdr)));
+ ehdr.e_phoff = 0;
+ ehdr.e_shoff = sizeof(Elf_Ehdr);
+ ehdr.e_phentsize = 0;
+ ehdr.e_phnum = 0;
+ ehdr.e_shstrndx = SHN_UNDEF;
+ memcpy(p + sizeof(int), &ehdr, sizeof(Elf_Ehdr));
+ *(int *)p = maxva - *symtab_addr;
+
+ /* Copy total length, crafted ELF header and section header table */
+ s = sizeof(int) + sizeof(Elf_Ehdr) + ehdr.e_shnum * sizeof(Elf_Shdr);
+ for ( i = 0; i < s; i += c, symva += c )
+ {
+ c = PAGE_SIZE - (symva & (PAGE_SIZE - 1));
+ if ( c > s - i )
+ c = s - i;
+ vaddr = map_pfn_writeable(pm_handle,
+ page_array[(symva - *virt_load_addr)
+ >> PAGE_SHIFT]);
+ if ( vaddr == NULL )
+ {
+ ERROR("Couldn't map guest memory");
+ goto out;
+ }
+ DPRINTF(("copy page %p to %p, count 0x%x\n", (void *)symva,
+ vaddr + (symva & (PAGE_SIZE - 1)), c));
+ memcpy(vaddr + (symva & (PAGE_SIZE - 1)), p + i,
+ c);
+ unmap_pfn(pm_handle, vaddr);
+ }
+
+ *symtab_len = maxva - *symtab_addr;
+
+ ret = 0;
+
+ out:
+ if ( ret == 0 )
+ {
+ maxva = (maxva + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1);
+ *ksize = (maxva - *virt_load_addr) >> PAGE_SHIFT;
+
+ DPRINTF(("virt_addr %p, kpages 0x%lx, symtab_addr %p, symtab_len %p\n",
+ (void *)*virt_load_addr, *ksize, (void *)*symtab_addr,
+ (void *)*symtab_len));
+ }
+
+ if ( phdr != NULL )
+ free(phdr);
+ if ( p != NULL )
+ free(p);
+ return ret;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-09 18:54:22 +0000