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(LOAD_PIC_REG): Define.

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(elf_machine_dynamic): Use it to force PIC register to be loaded.
(elf_machine_load_address): Likewise.
This commit is contained in:
Ulrich Drepper 2002-05-21 02:18:04 +00:00
parent ac8fa81c1e
commit f5cb3df4c0
2 changed files with 32 additions and 0 deletions
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16
sysdeps/sparc/sparc32/dl-machine.h
View File

@ -64,6 +64,17 @@ elf_machine_matches_host (const Elf32_Ehdr *ehdr)
return 0;
}
/* We have to do this because elf_machine_{dynamic,load_address} can be
invoked from functions that have no GOT references, and thus the compiler
has no obligation to load the PIC register. */
#define LOAD_PIC_REG(PIC_REG) \
do { register Elf32_Addr pc __asm("o7"); \
__asm("sethi %%hi(_GLOBAL_OFFSET_TABLE_-4), %1\n\t" \
"call 1f\n\t" \
"add %1, %%lo(_GLOBAL_OFFSET_TABLE_+4), %1\n" \
"1:\tadd %1, %0, %1" \
: "=r" (pc), "=r" (PIC_REG)); \
} while (0)
/* Return the link-time address of _DYNAMIC. Conveniently, this is the
first element of the GOT. This must be inlined in a function which
@ -72,6 +83,9 @@ static inline Elf32_Addr
elf_machine_dynamic (void)
{
register Elf32_Addr *got asm ("%l7");
LOAD_PIC_REG (got);
return *got;
}
@ -81,6 +95,8 @@ elf_machine_load_address (void)
{
register Elf32_Addr pc __asm("%o7"), pic __asm("%l7"), got;
LOAD_PIC_REG (pic);
/* Utilize the fact that a local .got entry will be partially
initialized at startup awaiting its RELATIVE fixup. */

16
sysdeps/sparc/sparc64/dl-machine.h
View File

@ -34,6 +34,18 @@ elf_machine_matches_host (const Elf64_Ehdr *ehdr)
return ehdr->e_machine == EM_SPARCV9;
}
/* We have to do this because elf_machine_{dynamic,load_address} can be
invoked from functions that have no GOT references, and thus the compiler
has no obligation to load the PIC register. */
#define LOAD_PIC_REG(PIC_REG) \
do { Elf64_Addr tmp; \
__asm("sethi %%hi(_GLOBAL_OFFSET_TABLE_-4), %1\n\t" \
"rd %%pc, %0\n\t" \
"add %1, %%lo(_GLOBAL_OFFSET_TABLE_+4), %1\n\t" \
"add %0, %1, %0" \
: "=r" (PIC_REG), "=r" (tmp)); \
} while (0)
/* 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. */
@ -42,6 +54,8 @@ elf_machine_dynamic (void)
{
register Elf64_Addr *elf_pic_register __asm__("%l7");
LOAD_PIC_REG (elf_pic_register);
return *elf_pic_register;
}
@ -51,6 +65,8 @@ elf_machine_load_address (void)
{
register Elf64_Addr *elf_pic_register __asm__("%l7");
LOAD_PIC_REG (elf_pic_register);
/* We used to utilize the fact that a local .got entry will
be partially initialized at startup awaiting its RELATIVE
fixup: