diff options
Diffstat (limited to 'sysdeps/sparc/sparc32/dl-machine.h')
| -rw-r--r-- | sysdeps/sparc/sparc32/dl-machine.h | 343 |
1 files changed, 194 insertions, 149 deletions
diff --git a/sysdeps/sparc/sparc32/dl-machine.h b/sysdeps/sparc/sparc32/dl-machine.h index 02dabaabb4..52fc6329dd 100644 --- a/sysdeps/sparc/sparc32/dl-machine.h +++ b/sysdeps/sparc/sparc32/dl-machine.h @@ -1,5 +1,5 @@ /* Machine-dependent ELF dynamic relocation inline functions. SPARC version. - Copyright (C) 1996-2003, 2004, 2005, 2006 Free Software Foundation, Inc. + Copyright (C) 1996-2003, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -40,6 +40,13 @@ #define OPCODE_SAVE_SP 0x9de3bfa8 /* save %sp, -(16+6)*4, %sp */ #define OPCODE_BA 0x30800000 /* b,a ?; add PC-rel word address */ +/* Use a different preload file when running in 32-bit emulation mode + on a 64-bit host. */ +#define LD_SO_PRELOAD ((GLRO(dl_hwcap) & HWCAP_SPARC_V9) \ + ? "/etc/ld.so.preload32" \ + : "/etc/ld.so.preload") + + /* Return nonzero iff ELF header is compatible with the running host. */ static inline int elf_machine_matches_host (const Elf32_Ehdr *ehdr) @@ -124,31 +131,30 @@ 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 (__builtin_expect(profile, 0)) + if (! profile) + rfunc = (Elf32_Addr) &_dl_runtime_resolve; + else { rfunc = (Elf32_Addr) &_dl_runtime_profile; - if (GLRO(dl_profile) != NULL - && _dl_name_match_p (GLRO(dl_profile), l)) + if (_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: - sethi %hi(_dl_runtime_{resolve,profile}), %g2 - pltpc: jmpl %g2 + %lo(_dl_runtime_{resolve,profile}), %g2 - nop + save %sp, -64, %sp + pltpc: call _dl_runtime_resolve + nop .word MAP - The PC value (pltpc) saved in %g2 by the jmpl points near the + This saves the register window containing the arguments, and the + PC value (pltpc) implicitly saved in %o7 by the call points near the location where we store the link_map pointer for this object. */ - plt[0] = 0x05000000 | ((rfunc >> 10) & 0x003fffff); - plt[1] = 0x85c0a000 | (rfunc & 0x3ff); + plt[0] = OPCODE_SAVE_SP; + /* Construct PC-relative word address. */ + plt[1] = OPCODE_CALL | ((rfunc - (Elf32_Addr) &plt[1]) >> 2); 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) @@ -184,6 +190,39 @@ 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 @@ -367,25 +406,18 @@ elf_machine_plt_value (struct link_map *map, const Elf32_Rela *reloc, #endif /* dl_machine_h */ -#define ARCH_LA_PLTENTER sparc32_gnu_pltenter -#define ARCH_LA_PLTEXIT sparc32_gnu_pltexit - -#ifdef RESOLVE_MAP +#ifdef RESOLVE /* Perform the relocation specified by RELOC and SYM (which is fully resolved). MAP is the object containing the reloc. */ -auto inline void -__attribute__ ((always_inline)) +static inline void elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc, const Elf32_Sym *sym, const struct r_found_version *version, 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 @@ -396,9 +428,6 @@ 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)) { @@ -406,148 +435,165 @@ 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; - } -#endif - -#ifndef RESOLVE_CONFLICT_FIND_MAP - if (__builtin_expect (ELF32_ST_BIND (sym->st_info) == STB_LOCAL, 0) - && sym->st_shndx != SHN_UNDEF) - { - value = map->l_addr; } else +#endif { - sym_map = RESOLVE_MAP (&sym, version, r_type); - value = sym_map == NULL ? 0 : sym_map->l_addr + sym->st_value; - } +#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 + } #else - value = 0; + value = 0; #endif + value += reloc->r_addend; /* Assume copy relocs have zero addend. */ - 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)) + switch (r_type) { - const char *strtab; +#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; - 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 + } } } -auto inline void -__attribute__ ((always_inline)) +static inline void elf_machine_rela_relative (Elf32_Addr l_addr, const Elf32_Rela *reloc, void *const reloc_addr_arg) { @@ -555,8 +601,7 @@ elf_machine_rela_relative (Elf32_Addr l_addr, const Elf32_Rela *reloc, *reloc_addr += l_addr + reloc->r_addend; } -auto inline void -__attribute__ ((always_inline)) +static inline void elf_machine_lazy_rel (struct link_map *map, Elf32_Addr l_addr, const Elf32_Rela *reloc) { @@ -572,4 +617,4 @@ elf_machine_lazy_rel (struct link_map *map, } } -#endif /* RESOLVE_MAP */ +#endif /* RESOLVE */ |