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- /*
- * Various assembly language/system dependent hacks that are required
- * so that we can minimize the amount of platform specific code.
- * Copyright (C) 2000-2004 by Erik Andersen <andersen@codepoet.org>
- */
- /* Define this if the system uses RELOCA. */
- #undef ELF_USES_RELOCA
- #include <elf.h>
- /* Initialization sequence for the GOT. */
- #define INIT_GOT(GOT_BASE,MODULE) \
- do { \
- GOT_BASE[2] = (unsigned long) _dl_linux_resolve; \
- GOT_BASE[1] = (unsigned long) MODULE; \
- } while(0)
- /* Here we define the magic numbers that this dynamic loader should accept */
- #define MAGIC1 EM_386
- #undef MAGIC2
- /* Used for error messages */
- #define ELF_TARGET "386"
- struct elf_resolve;
- extern unsigned long _dl_linux_resolver(struct elf_resolve * tpnt, int reloc_entry);
- /* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry or
- TLS variable, so undefined references should not be allowed to
- define the value.
- ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one
- of the main executable's symbols, as for a COPY reloc. */
- #define elf_machine_type_class(type) \
- ((((type) == R_386_JMP_SLOT || (type) == R_386_TLS_DTPMOD32 \
- || (type) == R_386_TLS_DTPOFF32 || (type) == R_386_TLS_TPOFF32 \
- || (type) == R_386_TLS_TPOFF) * ELF_RTYPE_CLASS_PLT) \
- | (((type) == R_386_COPY) * ELF_RTYPE_CLASS_COPY))
- /* Return the link-time address of _DYNAMIC. Conveniently, this is the
- first element of the GOT, a special entry that is never relocated. */
- extern const Elf32_Addr _GLOBAL_OFFSET_TABLE_[] attribute_hidden;
- static __always_inline Elf32_Addr __attribute__ ((unused, const))
- elf_machine_dynamic (void)
- {
- /* This produces a GOTOFF reloc that resolves to zero at link time, so in
- fact just loads from the GOT register directly. By doing it without
- an asm we can let the compiler choose any register. */
- return _GLOBAL_OFFSET_TABLE_[0];
- }
- extern Elf32_Dyn bygotoff[] __asm__ ("_DYNAMIC") attribute_hidden;
- /* Return the run-time load address of the shared object. */
- static __always_inline Elf32_Addr attribute_unused
- elf_machine_load_address (void)
- {
- /* Compute the difference between the runtime address of _DYNAMIC as seen
- by a GOTOFF reference, and the link-time address found in the special
- unrelocated first GOT entry. */
- return (Elf32_Addr) &bygotoff - elf_machine_dynamic ();
- }
- static __always_inline void
- elf_machine_relative (Elf32_Addr load_off, const Elf32_Addr rel_addr,
- Elf32_Word relative_count)
- {
- Elf32_Rel * rpnt = (void *) rel_addr;
- --rpnt;
- do {
- Elf32_Addr *const reloc_addr = (void *) (load_off + (++rpnt)->r_offset);
- *reloc_addr += load_off;
- } while (--relative_count);
- }
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