} while(0)
-/* Get link map for callers object containing STUB_PC. */
-static inline struct link_map *
-elf_machine_runtime_link_map (ElfW(Addr) gpreg, ElfW(Addr) stub_pc)
-{
- extern int _dl_mips_gnu_objects;
-
- /* got[1] is reserved to keep its link map address for the shared
- object generated by the gnu linker. If all are such objects, we
- can find the link map from current GPREG simply. If not so, get
- the link map for caller's object containing STUB_PC. */
-
- if (_dl_mips_gnu_objects)
- {
- ElfW(Addr) *got = elf_mips_got_from_gpreg (gpreg);
- ElfW(Word) g1;
-
- g1 = ((ElfW(Word) *) got)[1];
-
- if ((g1 & ELF_MIPS_GNU_GOT1_MASK) != 0)
- {
- struct link_map *l =
- (struct link_map *) (g1 & ~ELF_MIPS_GNU_GOT1_MASK);
- ElfW(Addr) base, limit;
- const ElfW(Phdr) *p = l->l_phdr;
- ElfW(Half) this, nent = l->l_phnum;
-
- /* For the common case of a stub being called from the containing
- object, STUB_PC will point to somewhere within the object that
- is described by the link map fetched via got[1]. Otherwise we
- have to scan all maps. */
- for (this = 0; this < nent; this++)
- {
- if (p[this].p_type == PT_LOAD)
- {
- base = p[this].p_vaddr + l->l_addr;
- limit = base + p[this].p_memsz;
- if (stub_pc >= base && stub_pc < limit)
- return l;
- }
- }
- }
- }
-
- struct link_map *l;
- Lmid_t nsid;
-
- for (nsid = 0; nsid < DL_NNS; ++nsid)
- for (l = GL(dl_ns)[nsid]._ns_loaded; l != NULL; l = l->l_next)
- {
- ElfW(Addr) base, limit;
- const ElfW(Phdr) *p = l->l_phdr;
- ElfW(Half) this, nent = l->l_phnum;
-
- for (this = 0; this < nent; ++this)
- {
- if (p[this].p_type == PT_LOAD)
- {
- base = p[this].p_vaddr + l->l_addr;
- limit = base + p[this].p_memsz;
- if (stub_pc >= base && stub_pc < limit)
- return l;
- }
- }
- }
-
- _dl_signal_error (0, NULL, NULL, "cannot find runtime link map");
- return NULL;
-}
-
-#if _MIPS_SIM == _ABIO32
-#define ELF_DL_FRAME_SIZE 40
-
-#define ELF_DL_SAVE_ARG_REGS "\
- sw $15, 36($29)\n \
- sw $4, 16($29)\n \
- sw $5, 20($29)\n \
- sw $6, 24($29)\n \
- sw $7, 28($29)\n \
-"
-
-#define ELF_DL_RESTORE_ARG_REGS "\
- lw $31, 36($29)\n \
- lw $4, 16($29)\n \
- lw $5, 20($29)\n \
- lw $6, 24($29)\n \
- lw $7, 28($29)\n \
-"
-
-#define IFABIO32(X) X
-
-#else /* _MIPS_SIM == _ABIN32 || _MIPS_SIM == _ABI64 */
-
-#define ELF_DL_FRAME_SIZE 80
-
-#define ELF_DL_SAVE_ARG_REGS "\
- sd $15, 72($29)\n \
- sd $4, 8($29)\n \
- sd $5, 16($29)\n \
- sd $6, 24($29)\n \
- sd $7, 32($29)\n \
- sd $8, 40($29)\n \
- sd $9, 48($29)\n \
- sd $10, 56($29)\n \
- sd $11, 64($29)\n \
-"
-
-#define ELF_DL_RESTORE_ARG_REGS "\
- ld $31, 72($29)\n \
- ld $4, 8($29)\n \
- ld $5, 16($29)\n \
- ld $6, 24($29)\n \
- ld $7, 32($29)\n \
- ld $8, 40($29)\n \
- ld $9, 48($29)\n \
- ld $10, 56($29)\n \
- ld $11, 64($29)\n \
-"
-
-#define IFABIO32(X)
-
-#endif
-
-/* Define mips specific runtime resolver. The function __dl_runtime_resolve
- is called from assembler function _dl_runtime_resolve which converts
- special argument registers t7 ($15) and t8 ($24):
- t7 address to return to the caller of the function
- t8 index for this function symbol in .dynsym
- to usual c arguments.
-
- Other architectures call fixup from dl-runtime.c in
- _dl_runtime_resolve. MIPS instead calls __dl_runtime_resolve. We
- have to use our own version because of the way the got section is
- treated on MIPS (we've also got ELF_MACHINE_PLT defined). */
-
-#define ELF_MACHINE_RUNTIME_TRAMPOLINE \
-/* The flag _dl_mips_gnu_objects is set if all dynamic objects are \
- generated by the gnu linker. */ \
-int _dl_mips_gnu_objects = 1; \
- \
-/* This is called from assembly stubs below which the compiler can't see. */ \
-static ElfW(Addr) \
-__dl_runtime_resolve (ElfW(Word), ElfW(Word), ElfW(Addr), ElfW(Addr)) \
- __attribute_used__; \
- \
-static ElfW(Addr) \
-__dl_runtime_resolve (ElfW(Word) sym_index, \
- ElfW(Word) return_address, \
- ElfW(Addr) old_gpreg, \
- ElfW(Addr) stub_pc) \
-{ \
- struct link_map *l = elf_machine_runtime_link_map (old_gpreg, stub_pc); \
- const ElfW(Sym) *const symtab \
- = (const ElfW(Sym) *) D_PTR (l, l_info[DT_SYMTAB]); \
- const char *strtab = (const void *) D_PTR (l, l_info[DT_STRTAB]); \
- ElfW(Addr) *got \
- = (ElfW(Addr) *) D_PTR (l, l_info[DT_PLTGOT]); \
- const ElfW(Word) local_gotno \
- = (const ElfW(Word)) l->l_info[DT_MIPS (LOCAL_GOTNO)]->d_un.d_val; \
- const ElfW(Word) gotsym \
- = (const ElfW(Word)) l->l_info[DT_MIPS (GOTSYM)]->d_un.d_val; \
- const ElfW(Sym) *sym = &symtab[sym_index]; \
- ElfW(Addr) value; \
- \
- /* FIXME: The symbol versioning stuff is not tested yet. */ \
- if (__builtin_expect (ELFW(ST_VISIBILITY) (sym->st_other), 0) == 0) \
- { \
- switch (l->l_info[VERSYMIDX (DT_VERSYM)] != NULL) \
- { \
- default: \
- { \
- const ElfW(Half) *vernum = \
- (const void *) D_PTR (l, l_info[VERSYMIDX (DT_VERSYM)]); \
- ElfW(Half) ndx = vernum[sym_index] & 0x7fff; \
- const struct r_found_version *version = &l->l_versions[ndx]; \
- \
- if (version->hash != 0) \
- { \
- value = _dl_lookup_symbol_x (strtab + sym->st_name, l, \
- &sym, l->l_scope, version, \
- ELF_RTYPE_CLASS_PLT, 0, 0); \
- break; \
- } \
- /* Fall through. */ \
- } \
- case 0: \
- value = _dl_lookup_symbol_x (strtab + sym->st_name, l, &sym, \
- l->l_scope, 0, ELF_RTYPE_CLASS_PLT, \
- DL_LOOKUP_ADD_DEPENDENCY, 0); \
- } \
- \
- /* Currently value contains the base load address of the object \
- that defines sym. Now add in the symbol offset. */ \
- value = (sym ? value + sym->st_value : 0); \
- } \
- else \
- /* We already found the symbol. The module (and therefore its load \
- address) is also known. */ \
- value = l->l_addr + sym->st_value; \
- \
- /* Apply the relocation with that value. */ \
- *(got + local_gotno + sym_index - gotsym) = value; \
- \
- return value; \
-} \
- \
-asm ("\n \
- .text\n \
- .align 2\n \
- .globl _dl_runtime_resolve\n \
- .type _dl_runtime_resolve,@function\n \
- .ent _dl_runtime_resolve\n \
-_dl_runtime_resolve:\n \
- .frame $29, " STRINGXP(ELF_DL_FRAME_SIZE) ", $31\n \
- .set noreorder\n \
- # Save GP.\n \
- move $3, $28\n \
- # Save arguments and sp value in stack.\n \
- " STRINGXP(PTR_SUBIU) " $29, " STRINGXP(ELF_DL_FRAME_SIZE) "\n \
- # Modify t9 ($25) so as to point .cpload instruction.\n \
- " IFABIO32(STRINGXP(PTR_ADDIU) " $25, 12\n") " \
- # Compute GP.\n \
- " STRINGXP(SETUP_GP) "\n \
- " STRINGXV(SETUP_GP64 (0, _dl_runtime_resolve)) "\n \
- .set reorder\n \
- # Save slot call pc.\n \
- move $2, $31\n \
- " IFABIO32(STRINGXP(CPRESTORE(32))) "\n \
- " ELF_DL_SAVE_ARG_REGS " \
- move $4, $24\n \
- move $5, $15\n \
- move $6, $3\n \
- move $7, $2\n \
- jal __dl_runtime_resolve\n \
- " ELF_DL_RESTORE_ARG_REGS " \
- " STRINGXP(RESTORE_GP64) "\n \
- " STRINGXP(PTR_ADDIU) " $29, " STRINGXP(ELF_DL_FRAME_SIZE) "\n \
- move $25, $2\n \
- jr $25\n \
- .end _dl_runtime_resolve\n \
- .previous\n \
-");
-
/* Mask identifying addresses reserved for the user program,
where the dynamic linker should not map anything. */
#define ELF_MACHINE_USER_ADDRESS_MASK 0x80000000UL
and not just plain _start. */
#define RTLD_START asm (\
- ".text\n"\
- _RTLD_PROLOGUE(ENTRY_POINT) "\
+ ".text\n\
+ " _RTLD_PROLOGUE(ENTRY_POINT) "\
" STRINGXV(SETUP_GPX($25)) "\n\
" STRINGXV(SETUP_GPX64($18,$25)) "\n\
# i386 ABI book says that the first entry of GOT holds\n\
" STRINGXP(PTR_ADDIU) " $29, 16\n\
# Get the value of label '_dl_start_user' in t9 ($25).\n\
" STRINGXP(PTR_LA) " $25, _dl_start_user\n\
- .globl _dl_start_user\n\
- .type _dl_start_user,@function\n\
- .aent _dl_start_user\n\
-_dl_start_user:\n\
+ " _RTLD_EPILOGUE(ENTRY_POINT) "\
+ \n\
+ \n\
+ " _RTLD_PROLOGUE(_dl_start_user) "\
" STRINGXP(SETUP_GP) "\n\
" STRINGXV(SETUP_GP64($18,_dl_start_user)) "\n\
move $16, $28\n\
sll $7, $5, " STRINGXP (PTRLOG) "\n\
" STRINGXP(PTR_ADDU) " $7, $7, $6\n\
" STRINGXP(PTR_ADDU) " $7, $7, " STRINGXP (PTRSIZE) " \n\
- " STRINGXP(PTR_SUBIU) " $29, 32\n\
+ # Make sure the stack pointer is aligned for _dl_init_internal.\n\
+ and $2, $29, -2 * " STRINGXP(SZREG) "\n\
+ " STRINGXP(PTR_S) " $29, -4($2)\n\
+ " STRINGXP(PTR_SUBIU) " $29, $2, 32\n\
" STRINGXP(SAVE_GP(16)) "\n\
# Call the function to run the initializers.\n\
jal _dl_init_internal\n\
- " STRINGXP(PTR_ADDIU) " $29, 32\n\
+ # Restore the stack pointer for _start.\n\
+ " STRINGXP(PTR_L) " $29, 28($29)\n\
# Pass our finalizer function to the user in $2 as per ELF ABI.\n\
" STRINGXP(PTR_LA) " $2, _dl_fini\n\
# Jump to the user entry point.\n\
move $25, $17\n\
jr $25\n\t"\
- _RTLD_EPILOGUE(ENTRY_POINT)\
+ _RTLD_EPILOGUE(_dl_start_user)\
".previous"\
);
/* The MIPS never uses Elfxx_Rela relocations. */
#define ELF_MACHINE_NO_RELA 1
+/* Names of the architecture-specific auditing callback functions. */
+# if _MIPS_SIM == _ABIO32
+# define ARCH_LA_PLTENTER mips_o32_gnu_pltenter
+# define ARCH_LA_PLTEXIT mips_o32_gnu_pltexit
+# elif _MIPS_SIM == _ABIN32
+# define ARCH_LA_PLTENTER mips_n32_gnu_pltenter
+# define ARCH_LA_PLTEXIT mips_n32_gnu_pltexit
+# else
+# define ARCH_LA_PLTENTER mips_n64_gnu_pltenter
+# define ARCH_LA_PLTEXIT mips_n64_gnu_pltexit
+# endif
+
#endif /* !dl_machine_h */
-#ifdef RESOLVE
+#ifdef RESOLVE_MAP
/* Perform the relocation specified by RELOC and SYM (which is fully resolved).
MAP is the object containing the reloc. */
-static inline void
-#ifdef RTLD_BOOTSTRAP
- __attribute__ ((always_inline))
-#endif
+auto inline void
+__attribute__ ((always_inline))
elf_machine_rel (struct link_map *map, const ElfW(Rel) *reloc,
const ElfW(Sym) *sym, const struct r_found_version *version,
void *const reloc_addr)
}
}
-static inline void
+auto inline void
+__attribute__((always_inline))
elf_machine_rel_relative (ElfW(Addr) l_addr, const ElfW(Rel) *reloc,
void *const reloc_addr)
{
/* XXX Nothing to do. There is no relative relocation, right? */
}
-static inline void
+auto inline void
+__attribute__((always_inline))
elf_machine_lazy_rel (struct link_map *map,
ElfW(Addr) l_addr, const ElfW(Rel) *reloc)
{
/* Do nothing. */
}
+auto inline void
+__attribute__ ((always_inline))
+elf_machine_rela (struct link_map *map, const ElfW(Rela) *reloc,
+ const ElfW(Sym) *sym, const struct r_found_version *version,
+ void *const reloc_addr)
+{
+}
+
+auto inline void
+__attribute__((always_inline))
+elf_machine_rela_relative (ElfW(Addr) l_addr, const ElfW(Rela) *reloc,
+ void *const reloc_addr)
+{
+}
+
#ifndef RTLD_BOOTSTRAP
/* Relocate GOT. */
-static inline void
+auto inline void
+__attribute__((always_inline))
elf_machine_got_rel (struct link_map *map, int lazy)
{
ElfW(Addr) *got;
const ElfW(Sym) *ref = sym; \
const struct r_found_version *version \
= vernum ? &map->l_versions[vernum[sym_index] & 0x7fff] : NULL; \
- ElfW(Addr) value; \
- value = RESOLVE (&ref, version, R_MIPS_REL32); \
- (ref)? value + ref->st_value: 0; \
+ struct link_map *sym_map; \
+ sym_map = RESOLVE_MAP (&ref, version, R_MIPS_REL32); \
+ ref ? sym_map->l_addr + ref->st_value : 0; \
})
if (map->l_info[VERSYMIDX (DT_VERSYM)] != NULL)
/* Set up the loaded object described by L so its stub function
will jump to the on-demand fixup code __dl_runtime_resolve. */
-static inline int
+auto inline int
+__attribute__((always_inline))
elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
{
# ifndef RTLD_BOOTSTRAP
return lazy;
}
-#endif /* RESOLVE */
+#endif /* RESOLVE_MAP */
projects / thirdparty / glibc.git / commitdiff
