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/* dl.h - types and prototypes for loadable module support */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2002,2004,2005,2007,2008,2009 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef GRUB_DL_H
#define GRUB_DL_H 1
#include <grub/symbol.h>
#ifndef ASM_FILE
#include <grub/err.h>
#include <grub/types.h>
#include <grub/elf.h>
#endif
/*
* Macros GRUB_MOD_INIT and GRUB_MOD_FINI are also used by build rules
* to collect module names, so we define them only when they are not
* defined already.
*/
#ifndef ASM_FILE
#ifndef GRUB_MOD_INIT
#define GRUB_MOD_INIT(name) \
static void grub_mod_init (grub_dl_t mod __attribute__ ((unused))) __attribute__ ((used)); \
void grub_##name##_init (void); \
void \
grub_##name##_init (void) { grub_mod_init (0); } \
static void \
grub_mod_init (grub_dl_t mod __attribute__ ((unused)))
#endif
#ifndef GRUB_MOD_FINI
#define GRUB_MOD_FINI(name) \
static void grub_mod_fini (void) __attribute__ ((used)); \
void grub_##name##_fini (void); \
void \
grub_##name##_fini (void) { grub_mod_fini (); } \
static void \
grub_mod_fini (void)
#endif
#ifdef APPLE_CC
#define GRUB_MOD_NAME(name) \
static char grub_modname[] __attribute__ ((section ("_modname, _modname"), used)) = #name;
#define GRUB_MOD_DEP(name) \
__asm__ (".section _moddeps, _moddeps\n.asciz \"" #name "\"\n")
#else
#define GRUB_MOD_NAME(name) \
__asm__ (".section .modname\n.asciz \"" #name "\"\n")
#define GRUB_MOD_DEP(name) \
__asm__ (".section .moddeps\n.asciz \"" #name "\"\n")
#endif
#endif
#ifndef ASM_FILE
#ifdef APPLE_CC
#define GRUB_MOD_SECTION(x) "_" #x ", _" #x ""
#else
#define GRUB_MOD_SECTION(x) "." #x
#endif
#else
#ifdef APPLE_CC
#define GRUB_MOD_SECTION(x) _ ## x , _ ##x
#else
#define GRUB_MOD_SECTION(x) . ## x
#endif
#endif
/* Me, Vladimir Serbinenko, hereby I add this module check as per new
GNU module policy. Note that this license check is informative only.
Modules have to be licensed under GPLv3 or GPLv3+ (optionally
multi-licensed under other licences as well) independently of the
presence of this check and solely by linking (module loading in GRUB
constitutes linking) and GRUB core being licensed under GPLv3+.
Be sure to understand your license obligations.
*/
#ifndef ASM_FILE
#define GRUB_MOD_LICENSE(license) \
static char grub_module_license[] __attribute__ ((section (GRUB_MOD_SECTION (module_license)), used)) = "LICENSE=" license;
#else
#define GRUB_MOD_LICENSE(license) \
.section GRUB_MOD_SECTION(module_license), "a"; \
.ascii "LICENSE="; \
.ascii license; \
.byte 0
#endif
/* Under GPL license obligations you have to distribute your module
under GPLv3(+). However, you can also distribute the same code under
another license as long as GPLv3(+) version is provided.
*/
#define GRUB_MOD_DUAL_LICENSE(x)
#ifndef ASM_FILE
struct grub_dl_segment
{
struct grub_dl_segment *next;
void *addr;
grub_size_t size;
unsigned section;
};
typedef struct grub_dl_segment *grub_dl_segment_t;
struct grub_dl;
struct grub_dl_dep
{
struct grub_dl_dep *next;
struct grub_dl *mod;
};
typedef struct grub_dl_dep *grub_dl_dep_t;
struct grub_dl
{
char *name;
int ref_count;
grub_dl_dep_t dep;
grub_dl_segment_t segment;
Elf_Sym *symtab;
void (*init) (struct grub_dl *mod);
void (*fini) (void);
struct grub_dl *next;
};
typedef struct grub_dl *grub_dl_t;
grub_dl_t EXPORT_FUNC(grub_dl_load_file) (const char *filename);
grub_dl_t EXPORT_FUNC(grub_dl_load) (const char *name);
grub_dl_t grub_dl_load_core (void *addr, grub_size_t size);
int EXPORT_FUNC(grub_dl_unload) (grub_dl_t mod);
void grub_dl_unload_unneeded (void);
int EXPORT_FUNC(grub_dl_ref) (grub_dl_t mod);
int EXPORT_FUNC(grub_dl_unref) (grub_dl_t mod);
extern grub_dl_t EXPORT_VAR(grub_dl_head);
#define FOR_DL_MODULES(var) FOR_LIST_ELEMENTS ((var), (grub_dl_head))
grub_dl_t EXPORT_FUNC(grub_dl_get) (const char *name);
grub_err_t grub_dl_register_symbol (const char *name, void *addr,
grub_dl_t mod);
grub_err_t grub_arch_dl_check_header (void *ehdr);
grub_err_t grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr);
#if defined (_mips)
#define GRUB_LINKER_HAVE_INIT 1
void grub_arch_dl_init_linker (void);
#endif
#endif
#endif /* ! GRUB_DL_H */
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