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2000-04-17 Andreas Jaeger <aj@suse.de>

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* sysdeps/mips/dl-machine.h (elf_machine_got_rel): Optimize a bit
	as suggested by Ulrich Drepper.
	(__dl_runtime_resolve): Remove unused variable, initialize sym
	directly.
	(RTLD_START): Document OFFSET_GP_GOT.
	(OFFSET_GP_GOT): New magic value.
	(elf_mips_got_from_gpreg): Use OFFSET_GP_GOT.
	(elf_machine_got_rel): Only declare strtab if needed.
This commit is contained in:
Andreas Jaeger 2000-04-17 21:22:59 +00:00
parent cdb2874e39
commit 4f20384216
1 changed files with 21 additions and 18 deletions
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27
sysdeps/mips/dl-machine.h
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@ -18,6 +18,7 @@
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */ Boston, MA 02111-1307, USA. */
/* FIXME: Profiling of shared libraries is not implemented yet. */
#ifndef dl_machine_h #ifndef dl_machine_h
#define dl_machine_h #define dl_machine_h
@ -31,6 +32,10 @@
#error ENTRY_POINT needs to be defined for MIPS. #error ENTRY_POINT needs to be defined for MIPS.
#endif #endif
/* The offset of gp from GOT might be system-dependent. It's set by
ld. The same value is also */
#define OFFSET_GP_GOT 0x7ff0
#ifndef _RTLD_PROLOGUE #ifndef _RTLD_PROLOGUE
# define _RTLD_PROLOGUE(entry) "\n\t.globl " #entry \ # define _RTLD_PROLOGUE(entry) "\n\t.globl " #entry \
"\n\t.ent " #entry \ "\n\t.ent " #entry \
@ -95,7 +100,7 @@ static inline ElfW(Addr) *
elf_mips_got_from_gpreg (ElfW(Addr) gpreg) elf_mips_got_from_gpreg (ElfW(Addr) gpreg)
{ {
/* FIXME: the offset of gp from GOT may be system-dependent. */ /* FIXME: the offset of gp from GOT may be system-dependent. */
return (ElfW(Addr) *) (gpreg - 0x7ff0); return (ElfW(Addr) *) (gpreg - OFFSET_GP_GOT);
} }
/* Return the link-time address of _DYNAMIC. Conveniently, this is the /* Return the link-time address of _DYNAMIC. Conveniently, this is the
@ -235,12 +240,9 @@ __dl_runtime_resolve (ElfW(Word) sym_index, \
= (const ElfW(Word)) l->l_info[DT_MIPS (LOCAL_GOTNO)]->d_un.d_val; \ = (const ElfW(Word)) l->l_info[DT_MIPS (LOCAL_GOTNO)]->d_un.d_val; \
const ElfW(Word) gotsym \ const ElfW(Word) gotsym \
= (const ElfW(Word)) l->l_info[DT_MIPS (GOTSYM)]->d_un.d_val; \ = (const ElfW(Word)) l->l_info[DT_MIPS (GOTSYM)]->d_un.d_val; \
const ElfW(Sym) *sym; \ const ElfW(Sym) *sym = &symtab[sym_index]; \
ElfW(Addr) funcaddr; \
ElfW(Addr) value; \ ElfW(Addr) value; \
\ \
/* Look up the symbol's run-time value. */ \
sym = &symtab[sym_index]; \
/* FIXME: The symbol versioning stuff is not tested yet. */ \ /* FIXME: The symbol versioning stuff is not tested yet. */ \
if (__builtin_expect (ELFW(ST_VISIBILITY) (sym->st_other), 0) == 0) \ if (__builtin_expect (ELFW(ST_VISIBILITY) (sym->st_other), 0) == 0) \
{ \ { \
@ -291,6 +293,7 @@ asm ("\n \
_dl_runtime_resolve:\n \ _dl_runtime_resolve:\n \
.set noreorder\n \ .set noreorder\n \
# Save slot call pc.\n \ # Save slot call pc.\n \
# XXX: Is this ok? \
move $3, $31\n \ move $3, $31\n \
# Modify t9 ($25) so as to point .cpload instruction.\n \ # Modify t9 ($25) so as to point .cpload instruction.\n \
addu $25,8\n \ addu $25,8\n \
@ -362,6 +365,7 @@ _RTLD_PROLOGUE(ENTRY_POINT)\
# the address of the dynamic structure. Though MIPS ABI\n\ # the address of the dynamic structure. Though MIPS ABI\n\
# doesn't say nothing about this, I emulate this here.\n\ # doesn't say nothing about this, I emulate this here.\n\
la $4, _DYNAMIC\n\ la $4, _DYNAMIC\n\
# Subtract OFFSET_GP_GOT\n\
sw $4, -0x7ff0($28)\n\ sw $4, -0x7ff0($28)\n\
move $4, $29\n\ move $4, $29\n\
subu $29, 16\n\ subu $29, 16\n\
@ -485,7 +489,9 @@ elf_machine_got_rel (struct link_map *map, int lazy)
ElfW(Addr) *got; ElfW(Addr) *got;
ElfW(Sym) *sym; ElfW(Sym) *sym;
int i, n, symidx; int i, n, symidx;
#ifndef RTLD_BOOTSTRAP
const char *strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]); const char *strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
#endif
/* This function is loaded in dl-reloc as a nested function and can /* This function is loaded in dl-reloc as a nested function and can
therefore access the variable scope from _dl_relocate_object. */ therefore access the variable scope from _dl_relocate_object. */
#ifdef RTLD_BOOTSTRAP #ifdef RTLD_BOOTSTRAP
@ -531,7 +537,7 @@ elf_machine_got_rel (struct link_map *map, int lazy)
i = (got[1] & ELF_MIPS_GNU_GOT1_MASK)? 2: 1; i = (got[1] & ELF_MIPS_GNU_GOT1_MASK)? 2: 1;
n = map->l_info[DT_MIPS (LOCAL_GOTNO)]->d_un.d_val; n = map->l_info[DT_MIPS (LOCAL_GOTNO)]->d_un.d_val;
/* Add the run-time display to all local got entries if needed. */ /* Add the run-time display to all local got entries if needed. */
if (map->l_addr != 0) if (__builtin_expect (map->l_addr != 0, 0))
{ {
while (i < n) while (i < n)
got[i++] += map->l_addr; got[i++] += map->l_addr;
@ -545,20 +551,17 @@ elf_machine_got_rel (struct link_map *map, int lazy)
i = (map->l_info[DT_MIPS (SYMTABNO)]->d_un.d_val i = (map->l_info[DT_MIPS (SYMTABNO)]->d_un.d_val
- map->l_info[DT_MIPS (GOTSYM)]->d_un.d_val); - map->l_info[DT_MIPS (GOTSYM)]->d_un.d_val);
/* This loop doesn't handle Quickstart. */
while (i--) while (i--)
{ {
if (sym->st_shndx == SHN_UNDEF) if (sym->st_shndx == SHN_UNDEF)
{ {
if (ELFW(ST_TYPE) (sym->st_info) == STT_FUNC) if (ELFW(ST_TYPE) (sym->st_info) == STT_FUNC
{ && sym->st_value && lazy)
if (sym->st_value && lazy)
*got = sym->st_value + map->l_addr; *got = sym->st_value + map->l_addr;
else else
*got = RESOLVE_GOTSYM (sym, symidx); *got = RESOLVE_GOTSYM (sym, symidx);
} }
else /* if (*got == 0 || *got == QS) */
*got = RESOLVE_GOTSYM (sym, symidx);
}
else if (sym->st_shndx == SHN_COMMON) else if (sym->st_shndx == SHN_COMMON)
*got = RESOLVE_GOTSYM (sym, symidx); *got = RESOLVE_GOTSYM (sym, symidx);
else if (ELFW(ST_TYPE) (sym->st_info) == STT_FUNC else if (ELFW(ST_TYPE) (sym->st_info) == STT_FUNC