diff options
Diffstat (limited to 'sysdeps/sparc/sparc32/dl-machine.h')
| -rw-r--r-- | sysdeps/sparc/sparc32/dl-machine.h | 325 |
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 */ |