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Diffstat (limited to 'sysdeps/sparc/sparc32/dl-machine.h')
-rw-r--r--sysdeps/sparc/sparc32/dl-machine.h325
1 files changed, 142 insertions, 183 deletions
diff --git a/sysdeps/sparc/sparc32/dl-machine.h b/sysdeps/sparc/sparc32/dl-machine.h
index d0af232d48..4ea122c46b 100644
--- a/sysdeps/sparc/sparc32/dl-machine.h
+++ b/sysdeps/sparc/sparc32/dl-machine.h
@@ -131,30 +131,31 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
bits of %g1 with an offset into the .rela.plt section and jump to
the beginning of the PLT. */
plt = (Elf32_Addr *) D_PTR (l, l_info[DT_PLTGOT]);
- if (! profile)
- rfunc = (Elf32_Addr) &_dl_runtime_resolve;
- else
+ if (__builtin_expect(profile, 0))
{
rfunc = (Elf32_Addr) &_dl_runtime_profile;
- if (_dl_name_match_p (GLRO(dl_profile), l))
+ if (GLRO(dl_profile) != NULL
+ && _dl_name_match_p (GLRO(dl_profile), l))
GL(dl_profile_map) = l;
}
+ else
+ {
+ rfunc = (Elf32_Addr) &_dl_runtime_resolve;
+ }
/* The beginning of the PLT does:
- save %sp, -64, %sp
- pltpc: call _dl_runtime_resolve
- nop
+ sethi %hi(_dl_runtime_{resolve,profile}), %g2
+ pltpc: jmpl %g2 + %lo(_dl_runtime_{resolve,profile}), %g2
+ nop
.word MAP
- This saves the register window containing the arguments, and the
- PC value (pltpc) implicitly saved in %o7 by the call points near the
+ The PC value (pltpc) saved in %g2 by the jmpl points near the
location where we store the link_map pointer for this object. */
- plt[0] = OPCODE_SAVE_SP;
- /* Construct PC-relative word address. */
- plt[1] = OPCODE_CALL | ((rfunc - (Elf32_Addr) &plt[1]) >> 2);
+ plt[0] = 0x05000000 | ((rfunc >> 10) & 0x003fffff);
+ plt[1] = 0x85c0a000 | (rfunc & 0x3ff);
plt[2] = OPCODE_NOP; /* Fill call delay slot. */
plt[3] = (Elf32_Addr) l;
if (__builtin_expect (l->l_info[VALIDX(DT_GNU_PRELINKED)] != NULL, 0)
@@ -190,39 +191,6 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
return lazy;
}
-/* This code is used in dl-runtime.c to call the `fixup' function
- and then redirect to the address it returns. */
-#define TRAMPOLINE_TEMPLATE(tramp_name, fixup_name) \
- asm ( "\
- .text\n\
- .globl " #tramp_name "\n\
- .type " #tramp_name ", @function\n\
- .align 32\n\
-" #tramp_name ":\n\
- /* Set up the arguments to fixup --\n\
- %o0 = link_map out of plt0\n\
- %o1 = offset of reloc entry\n\
- %o2 = return address */\n\
- ld [%o7 + 8], %o0\n\
- srl %g1, 10, %o1\n\
- mov %i7, %o2\n\
- call " #fixup_name "\n\
- sub %o1, 4*12, %o1\n\
- jmp %o0\n\
- restore\n\
- .size " #tramp_name ", . - " #tramp_name "\n\
- .previous")
-
-#ifndef PROF
-#define ELF_MACHINE_RUNTIME_TRAMPOLINE \
- TRAMPOLINE_TEMPLATE (_dl_runtime_resolve, fixup); \
- TRAMPOLINE_TEMPLATE (_dl_runtime_profile, profile_fixup);
-#else
-#define ELF_MACHINE_RUNTIME_TRAMPOLINE \
- TRAMPOLINE_TEMPLATE (_dl_runtime_resolve, fixup); \
- TRAMPOLINE_TEMPLATE (_dl_runtime_profile, fixup);
-#endif
-
/* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry, so
PLT entries should not be allowed to define the value.
ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one
@@ -406,7 +374,10 @@ elf_machine_plt_value (struct link_map *map, const Elf32_Rela *reloc,
#endif /* dl_machine_h */
-#ifdef RESOLVE
+#define ARCH_LA_PLTENTER sparc32_gnu_pltenter
+#define ARCH_LA_PLTEXIT sparc32_gnu_pltexit
+
+#ifdef RESOLVE_MAP
/* Perform the relocation specified by RELOC and SYM (which is fully resolved).
MAP is the object containing the reloc. */
@@ -418,7 +389,10 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
void *const reloc_addr_arg)
{
Elf32_Addr *const reloc_addr = reloc_addr_arg;
+ const Elf32_Sym *const refsym = sym;
+ Elf32_Addr value;
const unsigned int r_type = ELF32_R_TYPE (reloc->r_info);
+ struct link_map *sym_map = NULL;
#if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC
/* This is defined in rtld.c, but nowhere in the static libc.a; make the
@@ -429,6 +403,9 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
weak_extern (_dl_rtld_map);
#endif
+ if (__builtin_expect (r_type == R_SPARC_NONE, 0))
+ return;
+
#if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC
if (__builtin_expect (r_type == R_SPARC_RELATIVE, 0))
{
@@ -436,161 +413,143 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
if (map != &_dl_rtld_map) /* Already done in rtld itself. */
# endif
*reloc_addr += map->l_addr + reloc->r_addend;
+ return;
}
- else
-#endif
- {
-#if !defined RTLD_BOOTSTRAP && !defined RESOLVE_CONFLICT_FIND_MAP
- const Elf32_Sym *const refsym = sym;
-# ifdef USE_TLS
- struct link_map *sym_map;
-# endif
#endif
- Elf32_Addr value;
+
#ifndef RESOLVE_CONFLICT_FIND_MAP
- if (sym->st_shndx != SHN_UNDEF &&
- ELF32_ST_BIND (sym->st_info) == STB_LOCAL)
- {
- value = map->l_addr;
-# if defined USE_TLS && !defined RTLD_BOOTSTRAP
- sym_map = map;
-# endif
- }
- else
- {
-# if defined USE_TLS && !defined RTLD_BOOTSTRAP
- sym_map = RESOLVE_MAP (&sym, version, r_type);
- value = sym == NULL ? 0 : sym_map->l_addr + sym->st_value;
-# else
- value = RESOLVE (&sym, version, r_type);
- if (sym)
- value += sym->st_value;
-# endif
- }
+ if (__builtin_expect (ELF32_ST_BIND (sym->st_info) == STB_LOCAL, 0)
+ && sym->st_shndx != SHN_UNDEF)
+ {
+ value = map->l_addr;
+ }
+ else
+ {
+ sym_map = RESOLVE_MAP (&sym, version, r_type);
+ value = sym_map == NULL ? 0 : sym_map->l_addr + sym->st_value;
+ }
#else
- value = 0;
+ value = 0;
#endif
- value += reloc->r_addend; /* Assume copy relocs have zero addend. */
- switch (r_type)
- {
+ value += reloc->r_addend; /* Assume copy relocs have zero addend. */
+
+ switch (r_type)
+ {
#if !defined RTLD_BOOTSTRAP && !defined RESOLVE_CONFLICT_FIND_MAP
- case R_SPARC_COPY:
- if (sym == NULL)
- /* This can happen in trace mode if an object could not be
- found. */
- break;
- if (sym->st_size > refsym->st_size
- || (GLRO(dl_verbose) && sym->st_size < refsym->st_size))
- {
- const char *strtab;
+ case R_SPARC_COPY:
+ if (sym == NULL)
+ /* This can happen in trace mode if an object could not be
+ found. */
+ break;
+ if (sym->st_size > refsym->st_size
+ || (GLRO(dl_verbose) && sym->st_size < refsym->st_size))
+ {
+ const char *strtab;
- strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
- _dl_error_printf ("\
+ strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
+ _dl_error_printf ("\
%s: Symbol `%s' has different size in shared object, consider re-linking\n",
- rtld_progname ?: "<program name unknown>",
- strtab + refsym->st_name);
- }
- memcpy (reloc_addr_arg, (void *) value,
- MIN (sym->st_size, refsym->st_size));
- break;
+ rtld_progname ?: "<program name unknown>",
+ strtab + refsym->st_name);
+ }
+ memcpy (reloc_addr_arg, (void *) value,
+ MIN (sym->st_size, refsym->st_size));
+ break;
#endif
- case R_SPARC_GLOB_DAT:
- case R_SPARC_32:
- *reloc_addr = value;
- break;
- case R_SPARC_JMP_SLOT:
- /* At this point we don't need to bother with thread safety,
- so we can optimize the first instruction of .plt out. */
- sparc_fixup_plt (reloc, reloc_addr, value, 0);
- break;
+ case R_SPARC_GLOB_DAT:
+ case R_SPARC_32:
+ *reloc_addr = value;
+ break;
+ case R_SPARC_JMP_SLOT:
+ /* At this point we don't need to bother with thread safety,
+ so we can optimize the first instruction of .plt out. */
+ sparc_fixup_plt (reloc, reloc_addr, value, 0);
+ break;
#if defined USE_TLS && (!defined RTLD_BOOTSTRAP || USE___THREAD) \
&& !defined RESOLVE_CONFLICT_FIND_MAP
- case R_SPARC_TLS_DTPMOD32:
- /* Get the information from the link map returned by the
- resolv function. */
- if (sym_map != NULL)
- *reloc_addr = sym_map->l_tls_modid;
- break;
- case R_SPARC_TLS_DTPOFF32:
- /* During relocation all TLS symbols are defined and used.
- Therefore the offset is already correct. */
- *reloc_addr = (sym == NULL ? 0 : sym->st_value) + reloc->r_addend;
- break;
- case R_SPARC_TLS_TPOFF32:
- /* The offset is negative, forward from the thread pointer. */
- /* We know the offset of object the symbol is contained in.
- It is a negative value which will be added to the
- thread pointer. */
- if (sym != NULL)
- {
- CHECK_STATIC_TLS (map, sym_map);
- *reloc_addr = sym->st_value - sym_map->l_tls_offset
- + reloc->r_addend;
- }
- break;
+ case R_SPARC_TLS_DTPMOD32:
+ /* Get the information from the link map returned by the
+ resolv function. */
+ if (sym_map != NULL)
+ *reloc_addr = sym_map->l_tls_modid;
+ break;
+ case R_SPARC_TLS_DTPOFF32:
+ /* During relocation all TLS symbols are defined and used.
+ Therefore the offset is already correct. */
+ *reloc_addr = (sym == NULL ? 0 : sym->st_value) + reloc->r_addend;
+ break;
+ case R_SPARC_TLS_TPOFF32:
+ /* The offset is negative, forward from the thread pointer. */
+ /* We know the offset of object the symbol is contained in.
+ It is a negative value which will be added to the
+ thread pointer. */
+ if (sym != NULL)
+ {
+ CHECK_STATIC_TLS (map, sym_map);
+ *reloc_addr = sym->st_value - sym_map->l_tls_offset
+ + reloc->r_addend;
+ }
+ break;
# ifndef RTLD_BOOTSTRAP
- case R_SPARC_TLS_LE_HIX22:
- case R_SPARC_TLS_LE_LOX10:
- if (sym != NULL)
- {
- CHECK_STATIC_TLS (map, sym_map);
- value = sym->st_value - sym_map->l_tls_offset
- + reloc->r_addend;
- if (r_type == R_SPARC_TLS_LE_HIX22)
- *reloc_addr = (*reloc_addr & 0xffc00000) | ((~value) >> 10);
- else
- *reloc_addr = (*reloc_addr & 0xffffe000) | (value & 0x3ff)
- | 0x1c00;
- }
- break;
+ case R_SPARC_TLS_LE_HIX22:
+ case R_SPARC_TLS_LE_LOX10:
+ if (sym != NULL)
+ {
+ CHECK_STATIC_TLS (map, sym_map);
+ value = sym->st_value - sym_map->l_tls_offset
+ + reloc->r_addend;
+ if (r_type == R_SPARC_TLS_LE_HIX22)
+ *reloc_addr = (*reloc_addr & 0xffc00000) | ((~value) >> 10);
+ else
+ *reloc_addr = (*reloc_addr & 0xffffe000) | (value & 0x3ff)
+ | 0x1c00;
+ }
+ break;
# endif
#endif
#ifndef RTLD_BOOTSTRAP
- case R_SPARC_8:
- *(char *) reloc_addr = value;
- break;
- case R_SPARC_16:
- *(short *) reloc_addr = value;
- break;
- case R_SPARC_DISP8:
- *(char *) reloc_addr = (value - (Elf32_Addr) reloc_addr);
- break;
- case R_SPARC_DISP16:
- *(short *) reloc_addr = (value - (Elf32_Addr) reloc_addr);
- break;
- case R_SPARC_DISP32:
- *reloc_addr = (value - (Elf32_Addr) reloc_addr);
- break;
- case R_SPARC_LO10:
- *reloc_addr = (*reloc_addr & ~0x3ff) | (value & 0x3ff);
- break;
- case R_SPARC_WDISP30:
- *reloc_addr = ((*reloc_addr & 0xc0000000)
- | ((value - (unsigned int) reloc_addr) >> 2));
- break;
- case R_SPARC_HI22:
- *reloc_addr = (*reloc_addr & 0xffc00000) | (value >> 10);
- break;
- case R_SPARC_UA16:
- ((unsigned char *) reloc_addr_arg) [0] = value >> 8;
- ((unsigned char *) reloc_addr_arg) [1] = value;
- break;
- case R_SPARC_UA32:
- ((unsigned char *) reloc_addr_arg) [0] = value >> 24;
- ((unsigned char *) reloc_addr_arg) [1] = value >> 16;
- ((unsigned char *) reloc_addr_arg) [2] = value >> 8;
- ((unsigned char *) reloc_addr_arg) [3] = value;
- break;
+ case R_SPARC_8:
+ *(char *) reloc_addr = value;
+ break;
+ case R_SPARC_16:
+ *(short *) reloc_addr = value;
+ break;
+ case R_SPARC_DISP8:
+ *(char *) reloc_addr = (value - (Elf32_Addr) reloc_addr);
+ break;
+ case R_SPARC_DISP16:
+ *(short *) reloc_addr = (value - (Elf32_Addr) reloc_addr);
+ break;
+ case R_SPARC_DISP32:
+ *reloc_addr = (value - (Elf32_Addr) reloc_addr);
+ break;
+ case R_SPARC_LO10:
+ *reloc_addr = (*reloc_addr & ~0x3ff) | (value & 0x3ff);
+ break;
+ case R_SPARC_WDISP30:
+ *reloc_addr = ((*reloc_addr & 0xc0000000)
+ | ((value - (unsigned int) reloc_addr) >> 2));
+ break;
+ case R_SPARC_HI22:
+ *reloc_addr = (*reloc_addr & 0xffc00000) | (value >> 10);
+ break;
+ case R_SPARC_UA16:
+ ((unsigned char *) reloc_addr_arg) [0] = value >> 8;
+ ((unsigned char *) reloc_addr_arg) [1] = value;
+ break;
+ case R_SPARC_UA32:
+ ((unsigned char *) reloc_addr_arg) [0] = value >> 24;
+ ((unsigned char *) reloc_addr_arg) [1] = value >> 16;
+ ((unsigned char *) reloc_addr_arg) [2] = value >> 8;
+ ((unsigned char *) reloc_addr_arg) [3] = value;
+ break;
#endif
- case R_SPARC_NONE: /* Alright, Wilbur. */
- break;
#if !defined RTLD_BOOTSTRAP || defined _NDEBUG
- default:
- _dl_reloc_bad_type (map, r_type, 0);
- break;
+ default:
+ _dl_reloc_bad_type (map, r_type, 0);
+ break;
#endif
- }
}
}
@@ -620,4 +579,4 @@ elf_machine_lazy_rel (struct link_map *map,
}
}
-#endif /* RESOLVE */
+#endif /* RESOLVE_MAP */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-27 09:14:41 +0000