diff options
Diffstat (limited to 'ldso/ldso/i386/dl-sysdep.h')
| -rw-r--r-- | ldso/ldso/i386/dl-sysdep.h | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/ldso/ldso/i386/dl-sysdep.h b/ldso/ldso/i386/dl-sysdep.h index a534110e7..b0edee369 100644 --- a/ldso/ldso/i386/dl-sysdep.h +++ b/ldso/ldso/i386/dl-sysdep.h @@ -7,7 +7,7 @@ /* 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 { \ @@ -40,3 +40,42 @@ extern unsigned long _dl_linux_resolver(struct elf_resolve * tpnt, int reloc_ent #define elf_machine_type_class(type) \ ((((type) == R_386_JMP_SLOT) * 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. This must be inlined in a function which + uses global data. */ +static inline Elf32_Addr __attribute__ ((unused)) +elf_machine_dynamic (void) +{ + register Elf32_Addr *got asm ("%ebx"); + return *got; +} + + +/* Return the run-time load address of the shared object. */ +static inline Elf32_Addr __attribute__ ((unused)) +elf_machine_load_address (void) +{ + /* It doesn't matter what variable this is, the reference never makes + it to assembly. We need a dummy reference to some global variable + via the GOT to make sure the compiler initialized %ebx in time. */ + extern int _dl_argc; + Elf32_Addr addr; + asm ("leal _dl_boot@GOTOFF(%%ebx), %0\n" + "subl _dl_boot@GOT(%%ebx), %0" + : "=r" (addr) : "m" (_dl_argc) : "cc"); + return addr; +} + +static inline void +elf_machine_relative (Elf32_Addr load_off, const Elf32_Addr rel_addr, + Elf32_Word relative_count) +{ + Elf32_Rel * rpnt = (void *) (rel_addr + load_off); + --rpnt; + do { + Elf32_Addr *const reloc_addr = (void *) (load_off + (++rpnt)->r_offset); + + *reloc_addr = load_off; + } while (--relative_count); +} |