diff options
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/alpha/dl-machine.h | 23 | ||||
| -rw-r--r-- | sysdeps/arm/dl-machine.h | 7 | ||||
| -rw-r--r-- | sysdeps/generic/dl-lookupcfg.h | 22 | ||||
| -rw-r--r-- | sysdeps/generic/dl-machine.h | 7 | ||||
| -rw-r--r-- | sysdeps/generic/ldsodefs.h | 66 | ||||
| -rw-r--r-- | sysdeps/i386/dl-machine.h | 9 | ||||
| -rw-r--r-- | sysdeps/ia64/dl-fptr.c | 186 | ||||
| -rw-r--r-- | sysdeps/ia64/dl-lookupcfg.h | 23 | ||||
| -rw-r--r-- | sysdeps/ia64/dl-machine.h | 585 | ||||
| -rw-r--r-- | sysdeps/ia64/dl-symaddr.c | 39 | ||||
| -rw-r--r-- | sysdeps/m68k/dl-machine.h | 7 | ||||
| -rw-r--r-- | sysdeps/powerpc/dl-machine.h | 24 | ||||
| -rw-r--r-- | sysdeps/sparc/sparc32/dl-machine.h | 7 | ||||
| -rw-r--r-- | sysdeps/sparc/sparc64/dl-machine.h | 9 |
14 files changed, 956 insertions, 58 deletions
diff --git a/sysdeps/alpha/dl-machine.h b/sysdeps/alpha/dl-machine.h index 7e28d54c20..814e3552f1 100644 --- a/sysdeps/alpha/dl-machine.h +++ b/sysdeps/alpha/dl-machine.h @@ -68,7 +68,7 @@ elf_machine_load_address (void) are usually many many terabytes away. */ Elf64_Addr dot; - long zero_disp; + long int zero_disp; asm("br %0, 1f\n\t" ".weak __load_address_undefined\n\t" @@ -119,7 +119,7 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile) /* If the first instruction of the plt entry is not "br $28, plt0", we cannot do lazy relocation. */ - lazy = (*(unsigned *)(plt + 32) == 0xc39ffff7); + lazy = (*(unsigned int *)(plt + 32) == 0xc39ffff7); } return lazy; @@ -363,13 +363,14 @@ $fixup_stack: /* Fix up the instructions of a PLT entry to invoke the function rather than the dynamic linker. */ -static inline void -elf_machine_fixup_plt(struct link_map *l, const Elf64_Rela *reloc, - Elf64_Addr *got_addr, Elf64_Addr value) +static inline Elf64_Addr +elf_machine_fixup_plt (struct link_map *l, lookup_t t, + const Elf64_Rela *reloc, + Elf64_Addr *got_addr, Elf64_Addr value) { const Elf64_Rela *rela_plt; Elf64_Word *plte; - long edisp; + long int edisp; /* Store the value we are going to load. */ *got_addr = value; @@ -381,7 +382,7 @@ elf_machine_fixup_plt(struct link_map *l, const Elf64_Rela *reloc, plte += 3 * (reloc - rela_plt); /* Find the displacement from the plt entry to the function. */ - edisp = (long)(value - (Elf64_Addr)&plte[3]) / 4; + edisp = (long int) (value - (Elf64_Addr)&plte[3]) / 4; if (edisp >= -0x100000 && edisp < 0x100000) { @@ -391,7 +392,7 @@ elf_machine_fixup_plt(struct link_map *l, const Elf64_Rela *reloc, int hi, lo; hi = value - (Elf64_Addr)&plte[0]; - lo = (short)hi; + lo = (short int) hi; hi = (hi - lo) >> 16; /* Emit "lda $27,lo($27)" */ @@ -436,6 +437,8 @@ elf_machine_fixup_plt(struct link_map *l, const Elf64_Rela *reloc, This will be taken care of in _dl_runtime_resolve. If instead we are doing this as part of non-lazy startup relocation, that bit of code hasn't made it into Icache yet, so there's nothing to clean up. */ + + return value; } /* Return the final value of a plt relocation. */ @@ -459,7 +462,7 @@ elf_machine_rela (struct link_map *map, const struct r_found_version *version, Elf64_Addr *const reloc_addr) { - unsigned long const r_type = ELF64_R_TYPE (reloc->r_info); + unsigned long int const r_type = ELF64_R_TYPE (reloc->r_info); #ifndef RTLD_BOOTSTRAP /* This is defined in rtld.c, but nowhere in the static libc.a; make the @@ -525,7 +528,7 @@ elf_machine_lazy_rel (struct link_map *map, Elf64_Addr l_addr, const Elf64_Rela *reloc) { Elf64_Addr * const reloc_addr = (void *)(l_addr + reloc->r_offset); - unsigned long const r_type = ELF64_R_TYPE (reloc->r_info); + unsigned long int const r_type = ELF64_R_TYPE (reloc->r_info); if (r_type == R_ALPHA_JMP_SLOT) { diff --git a/sysdeps/arm/dl-machine.h b/sysdeps/arm/dl-machine.h index 19276abfa1..44087585f0 100644 --- a/sysdeps/arm/dl-machine.h +++ b/sysdeps/arm/dl-machine.h @@ -354,11 +354,12 @@ dl_platform_init (void) _dl_platform = NULL; } -static inline void -elf_machine_fixup_plt (struct link_map *map, const Elf32_Rel *reloc, +static inline Elf32_Addr +elf_machine_fixup_plt (struct link_map *map, lookup_t t, + const Elf32_Rel *reloc, Elf32_Addr *reloc_addr, Elf32_Addr value) { - *reloc_addr = value; + return *reloc_addr = value; } /* Return the final value of a plt relocation. */ diff --git a/sysdeps/generic/dl-lookupcfg.h b/sysdeps/generic/dl-lookupcfg.h new file mode 100644 index 0000000000..8ce19b8741 --- /dev/null +++ b/sysdeps/generic/dl-lookupcfg.h @@ -0,0 +1,22 @@ +/* Configuration of lookup functions. + Copyright (C) 2000 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 + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* Some platforms need more information from the symbol lookup function + than just the address. But this is not generally the case. */ +#undef DL_LOOKUP_RETURNS_MAP diff --git a/sysdeps/generic/dl-machine.h b/sysdeps/generic/dl-machine.h index d74aebeb6d..a23f178034 100644 --- a/sysdeps/generic/dl-machine.h +++ b/sysdeps/generic/dl-machine.h @@ -52,11 +52,12 @@ elf_machine_load_address (void) /* Fixup a PLT entry to bounce directly to the function at VALUE. */ -static inline void -elf_machine_fixup_plt (struct link_map *map, const Elf32_Rel *reloc, +static inline Elf32_Addr +elf_machine_fixup_plt (struct link_map *map, lookup_t t, + const Elf32_Rel *reloc, Elf32_Addr *reloc_addr, Elf32_Addr value) { - *reloc_addr = value; + return *reloc_addr = value; } /* Perform the relocation specified by RELOC and SYM (which is fully resolved). diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h index ff58115f1c..4fc1578a95 100644 --- a/sysdeps/generic/ldsodefs.h +++ b/sysdeps/generic/ldsodefs.h @@ -30,6 +30,7 @@ #include <elf.h> #include <dlfcn.h> #include <link.h> +#include <dl-lookupcfg.h> __BEGIN_DECLS @@ -49,6 +50,27 @@ __BEGIN_DECLS # define D_PTR(map,i) map->i->d_un.d_ptr #endif +/* On some platforms more information than just the address of the symbol + is needed from the lookup functions. In this case we return the whole + link map. */ +#ifdef DL_LOOKUP_RETURNS_MAP +typedef struct link_map *lookup_t; +# define LOOKUP_VALUE(map) map +# define LOOKUP_VALUE_ADDRESS(map) (map ? map->l_addr : 0) +#else +typedef ElfW(Addr) lookup_t; +# define LOOKUP_VALUE(map) map->l_addr +# define LOOKUP_VALUE_ADDRESS(address) address +#endif + +/* on some architectures a pointer to a function is not just a pointer + to the actual code of the function but rather an architecture + specific descriptor. */ +#ifndef ELF_FUNCTION_PTR_IS_SPECIAL +#define DL_SYMBOL_ADDRESS(map, ref) \ + (void *) (LOOKUP_VALUE_ADDRESS (map) + ref->st_value) +#endif + /* For the version handling we need an array with only names and their hash values. */ struct r_found_version @@ -271,38 +293,38 @@ extern void _dl_setup_hash (struct link_map *map) internal_function; RELOC_TYPE is a machine-dependent reloc type, which is passed to the `elf_machine_lookup_*_p' macros in dl-machine.h to affect which symbols can be chosen. */ -extern ElfW(Addr) _dl_lookup_symbol (const char *undef, - struct link_map *undef_map, - const ElfW(Sym) **sym, - struct r_scope_elem *symbol_scope[], - int reloc_type) +extern lookup_t _dl_lookup_symbol (const char *undef, + struct link_map *undef_map, + const ElfW(Sym) **sym, + struct r_scope_elem *symbol_scope[], + int reloc_type) internal_function; /* Lookup versioned symbol. */ -extern ElfW(Addr) _dl_lookup_versioned_symbol (const char *undef, - struct link_map *undef_map, - const ElfW(Sym) **sym, - struct r_scope_elem *symbol_scope[], - const struct r_found_version *version, - int reloc_type) +extern lookup_t _dl_lookup_versioned_symbol (const char *undef, + struct link_map *undef_map, + const ElfW(Sym) **sym, + struct r_scope_elem *symbol_scope[], + const struct r_found_version *version, + int reloc_type) internal_function; /* For handling RTLD_NEXT we must be able to skip shared objects. */ -extern ElfW(Addr) _dl_lookup_symbol_skip (const char *undef, - struct link_map *undef_map, - const ElfW(Sym) **sym, - struct r_scope_elem *symbol_scope[], - struct link_map *skip_this) +extern lookup_t _dl_lookup_symbol_skip (const char *undef, + struct link_map *undef_map, + const ElfW(Sym) **sym, + struct r_scope_elem *symbol_scope[], + struct link_map *skip_this) internal_function; /* For handling RTLD_NEXT with versioned symbols we must be able to skip shared objects. */ -extern ElfW(Addr) _dl_lookup_versioned_symbol_skip (const char *undef, - struct link_map *undef_map, - const ElfW(Sym) **sym, - struct r_scope_elem *symbol_scope[], - const struct r_found_version *version, - struct link_map *skip_this) +extern lookup_t _dl_lookup_versioned_symbol_skip (const char *undef, + struct link_map *undef_map, + const ElfW(Sym) **sym, + struct r_scope_elem *symbol_scope[], + const struct r_found_version *version, + struct link_map *skip_this) internal_function; /* Look up symbol NAME in MAP's scope and return its run-time address. */ diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h index de6ef9886e..d7310eda57 100644 --- a/sysdeps/i386/dl-machine.h +++ b/sysdeps/i386/dl-machine.h @@ -1,5 +1,5 @@ /* Machine-dependent ELF dynamic relocation inline functions. i386 version. - Copyright (C) 1995,96,97,98,99,2000 Free Software Foundation, Inc. + Copyright (C) 1995, 96, 97, 98, 99, 2000 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 @@ -279,11 +279,12 @@ dl_platform_init (void) _dl_platform = NULL; } -static inline void -elf_machine_fixup_plt (struct link_map *map, const Elf32_Rel *reloc, +static inline Elf32_Addr +elf_machine_fixup_plt (struct link_map *map, lookup_t t, + const Elf32_Rel *reloc, Elf32_Addr *reloc_addr, Elf32_Addr value) { - *reloc_addr = value; + return *reloc_addr = value; } /* Return the final value of a plt relocation. */ diff --git a/sysdeps/ia64/dl-fptr.c b/sysdeps/ia64/dl-fptr.c new file mode 100644 index 0000000000..0fb9654ab8 --- /dev/null +++ b/sysdeps/ia64/dl-fptr.c @@ -0,0 +1,186 @@ +/* Unmap a loaded object. IA-64 version. + Copyright (C) 1999, 2000 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 + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <unistd.h> +#include <string.h> +#include <sys/param.h> +#include <sys/mman.h> +#include <link.h> +#include <ldsodefs.h> +#include <elf/dynamic-link.h> +#include <dl-machine.h> +#ifdef _LIBC_REENTRANT +# include <pt-machine.h> + +static int __ia64_fptr_lock = 0; +#endif + +/* Because ld.so is now versioned, these functions can be in their own + file; no relocations need to be done to call them. Of course, if + ld.so is not versioned... */ +#if 0 +#ifndef DO_VERSIONING +# error "This will not work with versioning turned off, sorry." +#endif +#endif + +#ifdef MAP_ANON +/* The fd is not examined when using MAP_ANON. */ +#define ANONFD -1 +#else +extern int _dl_zerofd; +#define ANONFD _dl_zerofd +#endif + + +/* ld.so currently has 14 FPTR relocs, we take 256 and use them for + the relocs for the dynamic app itself. */ +struct ia64_fptr __boot_ldso_fptr[IA64_BOOT_FPTR_SIZE]; +struct ia64_fptr *__fptr_root = NULL; +struct ia64_fptr *__fptr_next = __boot_ldso_fptr; +static struct ia64_fptr *__fptr_free = NULL; +int __fptr_count = IA64_BOOT_FPTR_SIZE; + +Elf64_Addr +__ia64_make_fptr (const struct link_map *sym_map, Elf64_Addr value, + struct ia64_fptr **root, struct ia64_fptr *mem) +{ + struct ia64_fptr **loc; + struct ia64_fptr *f; + +#ifdef _LIBC_REENTRANT + /* Make sure we are alone. We don't need a lock during bootstrap. */ + if (mem == NULL) + while (testandset (&__ia64_fptr_lock)); +#endif + + /* Search the sorted linked list for an existing entry for this + symbol. */ + loc = root; + f = *loc; + while (f != NULL && f->func <= value) + { + if (f->func == value) + goto found; + loc = &f->next; + f = *loc; + } + + /* Not found. Create a new one. */ + if (mem != NULL) + f = mem; + else if (__fptr_free != NULL) + { + f = __fptr_free; + __fptr_free = f->next; + } + else + { + if (__fptr_count == 0) + { +#ifndef MAP_ANON +# define MAP_ANON 0 + if (_dl_zerofd == -1) + { + _dl_zerofd = _dl_sysdep_open_zero_fill (); + if (_dl_zerofd == -1) + { + __close (fd); + _dl_signal_error (errno, NULL, + "cannot open zero fill device"); + } + } +#endif + + __fptr_next = __mmap (0, _dl_pagesize, PROT_READ | PROT_WRITE, + MAP_ANON | MAP_PRIVATE, ANONFD, 0); + if (__fptr_next == MAP_FAILED) + _dl_signal_error(errno, NULL, "cannot map page for fptr"); + __fptr_count = _dl_pagesize / sizeof (struct ia64_fptr); + } + f = __fptr_next++; + __fptr_count--; + } + + f->func = value; + /* GOT has already been relocated in elf_get_dynamic_info - don't + try to relocate it again. */ + f->gp = sym_map->l_info[DT_PLTGOT]->d_un.d_ptr; + f->next = *loc; + *loc = f; + +found: +#ifdef _LIBC_REENTRANT + /* Release the lock. */ + if (mem == NULL) + __ia64_fptr_lock = 0; +#endif + + return (Elf64_Addr) f; +} + +void +_dl_unmap (struct link_map *map) +{ + struct ia64_fptr **floc; + struct ia64_fptr *f; + struct ia64_fptr **lloc; + struct ia64_fptr *l; + + __munmap ((void *) map->l_map_start, map->l_map_end - map->l_map_start); + +#ifdef _LIBC_REENTRANT + /* Make sure we are alone. */ + while (testandset (&__ia64_fptr_lock)); +#endif + + /* Search the sorted linked list for the first entry for this object. */ + floc = &__fptr_root; + f = *floc; + while (f != NULL && f->func < map->l_map_start) + { + floc = &f->next; + f = *floc; + } + + /* We found one. */ + if (f != NULL && f->func < map->l_map_end) + { + /* Get the last entry. */ + lloc = floc; + l = f; + while (l && l->func < map->l_map_end) + { + lloc = &l->next; + l = *lloc; + } + + /* Updated FPTR. */ + *floc = l; + + /* Prepend them to the free list. */ + *lloc = __fptr_free; + __fptr_free = f; + } + +#ifdef _LIBC_REENTRANT + /* Release the lock. */ + __ia64_fptr_lock = 0; +#endif +} diff --git a/sysdeps/ia64/dl-lookupcfg.h b/sysdeps/ia64/dl-lookupcfg.h new file mode 100644 index 0000000000..f954a5cd49 --- /dev/null +++ b/sysdeps/ia64/dl-lookupcfg.h @@ -0,0 +1,23 @@ +/* Configuration of lookup functions. + Copyright (C) 2000 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 + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* The ia64 need more information from the symbol lookup function + than just the address. */ +#define DL_LOOKUP_RETURNS_MAP +#define ELF_FUNCTION_PTR_IS_SPECIAL diff --git a/sysdeps/ia64/dl-machine.h b/sysdeps/ia64/dl-machine.h new file mode 100644 index 0000000000..7fba08dabe --- /dev/null +++ b/sysdeps/ia64/dl-machine.h @@ -0,0 +1,585 @@ +/* Machine-dependent ELF dynamic relocation inline functions. IA-64 version. + Copyright (C) 1995, 1996, 1997, 2000 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 + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If + not, write to the Free Software Foundation, Inc., + 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#ifndef dl_machine_h +#define dl_machine_h 1 + +#define ELF_MACHINE_NAME "ia64" + +#include <assert.h> +#include <string.h> +#include <link.h> +#include <errno.h> + + +/* Translate a processor specific dynamic tag to the index + in l_info array. */ +#define DT_IA_64(x) (DT_IA_64_##x - DT_LOPROC + DT_NUM) + + +/* An FPTR is a function descriptor. Properly they consist of just + FUNC and GP. But we want to traverse a binary tree too. */ + +#define IA64_BOOT_FPTR_SIZE 256 + +struct ia64_fptr +{ + Elf64_Addr func; + Elf64_Addr gp; + struct ia64_fptr *next; +}; + +extern struct ia64_fptr __boot_ldso_fptr[]; +extern struct ia64_fptr *__fptr_next; +extern struct ia64_fptr *__fptr_root; +extern int __fptr_count; + +extern Elf64_Addr __ia64_make_fptr (const struct link_map *, Elf64_Addr, + struct ia64_fptr **, struct ia64_fptr *); + +/* Return nonzero iff E_MACHINE is compatible with the running host. */ +static inline int +elf_machine_matches_host (Elf64_Word e_machine) +{ + return e_machine == EM_IA_64; +} + +void * _dl_symbol_address (const struct link_map *map, const ElfW(Sym) *ref); + +#define DL_SYMBOL_ADDRESS(map, ref) _dl_symbol_address(map, ref) + + +/* Return the link-time address of _DYNAMIC. */ +static inline Elf64_Addr +elf_machine_dynamic (void) +{ + Elf64_Addr *p; + + __asm__( + ".section .sdata\n" + " .type __dynamic_ltv#, @object\n" + " .size __dynamic_ltv#, 8\n" + "__dynamic_ltv:\n" + " data8 @ltv(_DYNAMIC#)\n" + ".previous\n" + " addl %0 = @gprel(__dynamic_ltv#), gp ;;" + : "=r"(p)); + + return *p; +} + + +/* Return the run-time load address of the shared object. */ +static inline Elf64_Addr +elf_machine_load_address (void) +{ + Elf64_Addr ip; + int *p; + + __asm__( + "1: mov %0 = ip\n" + ".section .sdata\n" + "2: data4 @ltv(1b)\n" + " .align 8\n" + ".previous\n" + " addl %1 = @gprel(2b), gp ;;" + : "=r"(ip), "=r"(p)); + + return ip - (Elf64_Addr)*p; +} + + +/* Set up the loaded object described by L so its unrelocated PLT + entries will jump to the on-demand fixup code in dl-runtime.c. */ + +static inline int +elf_machine_runtime_setup (struct link_map *l, int lazy, int profile) +{ + extern void _dl_runtime_resolve (void); + extern void _dl_runtime_profile (void); + + if (lazy) + { + register Elf64_Addr gp __asm__("gp"); + Elf64_Addr *reserve, doit; + + /* + * Careful with the typecast here or it will try to add l-l_addr + * pointer elements + */ + reserve = (Elf64_Addr *) + (l->l_info[DT_IA_64(PLT_RESERVE)]->d_un.d_ptr + l->l_addr); + /* Identify this shared object. */ + reserve[0] = (Elf64_Addr) l; + + /* This function will be called to perform the relocation. */ + if (!profile) + doit = (Elf64_Addr) ((struct ia64_fptr *)&_dl_runtime_resolve)->func; + else + { + if (_dl_name_match_p (_dl_profile, l)) + { + /* This is the object we are looking for. Say that we really + want profiling and the timers are started. */ + _dl_profile_map = l; + } + doit = (Elf64_Addr) ((struct ia64_fptr *)&_dl_runtime_profile)->func; + } + + reserve[1] = doit; + reserve[2] = gp; + } + + return lazy; +} + + +/* + This code is used in dl-runtime.c to call the `fixup' function + and then redirect to the address it returns. `fixup()' takes two + arguments, however fixup_profile() takes three. + + The ABI specifies that we will never see more than 8 input + registers to a function call, thus it is safe to simply allocate + those, and simpler than playing stack games. + - 12/09/99 Jes + */ +#define TRAMPOLINE_TEMPLATE(tramp_name, fixup_name) \ + extern void tramp_name (void); \ + asm ( "\ + .global " #tramp_name "# + .proc " #tramp_name "# +" #tramp_name ": + { .mmi + alloc loc0 = ar.pfs, 8, 2, 3, 0 + adds r2 = -144, r12 + adds r3 = -128, r12 + } + { .mii + adds r12 = -160, r12 + mov loc1 = b0 + mov out2 = b0 /* needed by fixup_profile */ + ;; + } + { .mmi + stf.spill [r2] = f8, 32 + stf.spill [r3] = f9, 32 + mov out0 = r16 + ;; + } + { .mmi + stf.spill [r2] = f10, 32 + stf.spill [r3] = f11, 32 + shl out1 = r15, 4 + ;; + } + { .mmi + stf.spill [r2] = f12, 32 + stf.spill [r3] = f13, 32 + shladd out1 = r15, 3, out1 + ;; + } + { .mmb + stf.spill [r2] = f14 + stf.spill [r3] = f15 + br.call.sptk.many b0 = " #fixup_name "# + } + { .mii + ld8 r9 = [ret0], 8 + adds r2 = 16, r12 + adds r3 = 32, r12 + ;; + } + { .mmi + ldf.fill f8 = [r2], 32 + ldf.fill f9 = [r3], 32 + mov b0 = loc1 + ;; + } + { .mmi + ldf.fill f10 = [r2], 32 + ldf.fill f11 = [r3], 32 + mov b6 = r9 + ;; + } + { .mmi + ldf.fill f12 = [r2], 32 + ldf.fill f13 = [r3], 32 + mov ar.pfs = loc0 + ;; + } + { .mmi + ldf.fill f14 = [r2], 32 + ldf.fill f15 = [r3], 32 + adds r12 = 160, r12 + ;; + } + /* An alloc is needed for the break system call to work. + We don't care about the old value of the pfs register. */ + { .mmb + alloc r2 = ar.pfs, 0, 0, 8, 0 + ld8 gp = [ret0] + br.sptk.many b6 + ;; + } + .endp " #tramp_name "#") + +#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); \ + strong_alias (_dl_runtime_resolve, _dl_runtime_profile); +#endif + + +/* Initial entry point code for the dynamic linker. + The C function `_dl_start' is the real entry point; + its return value is the user program's entry point. */ + +#define RTLD_START asm ("\ +.text + .global _start# + .proc _start# +_start: +0: { .mii + alloc loc0 = ar.pfs, 0, 3, 4, 0 + mov r2 = ip + addl r3 = @gprel(0b), r0 + ;; + } + { .mlx + /* Calculate the GP, and save a copy in loc1. */ + sub gp = r2, r3 + movl r8 = 0x9804c0270033f + ;; + } + { .mii + mov ar.fpsr = r8 + sub loc1 = r2, r3 + /* _dl_start wants a pointer to the pointer to the arg block + and the arg block starts with an integer, thus the magic 16. */ + adds out0 = 16, sp + } + { .bbb + br.call.sptk.many b0 = _dl_start# + ;; + } + .endp _start# + /* FALLTHRU */ + .global _dl_start_user# + .proc _dl_start_user# +_dl_start_user: + { .mii + /* Save the pointer to the user entry point fptr in loc2. */ + mov loc2 = ret0 + /* Store the highest stack address. */ + addl r2 = @ltoff(__libc_stack_end#), gp + addl r3 = @gprel(_dl_skip_args), gp + ;; + } + { .mmi + ld8 r2 = [r2] + ld4 r3 = [r3] + adds r11 = 24, sp /* Load the address of argv. */ + ;; + } + { .mii + st8 [r2] = sp + adds r10 = 16, sp /* Load the address of argc. */ + mov out2 = r11 + ;; + /* See if we were run as a command with the executable file + name as an extra leading argument. If so, adjust the argv + pointer to skip _dl_skip_args words. + Note that _dl_skip_args is an integer, not a long - Jes + + The stack pointer has to be 16 byte aligned. We cannot simply + addjust the stack pointer. We have to move the whole argv and + envp. H.J. */ + } + { .mmi + ld8 out1 = [r10] /* is argc actually stored as a long + or as an int? */ + ;; + sub out1 = out1, r3 /* Get the new argc. */ + shladd r15 = r3, 3, r11 /* The address of the argv we move */ + ;; + } + /* ??? Could probably merge these two loops into 3 bundles. + using predication to control which set of copies we're on. */ +1: /* Copy argv. */ + { .mfi + ld8 r16 = [r15], 8 /* Load the value in the old argv. */ + ;; + } + { .mib + st8 [r11] = r16, 8 /* Store it in the new argv. */ + cmp.ne p6, p7 = 0, r16 +(p6) br.cond.dptk.few 1b + ;; + } + { .mib + mov out3 = r11 + addl out0 = @ltoff(_dl_loaded), gp + } +1: /* Copy env. */ + { .mfi + ld8 r16 = [r15], 8 /* Load the value in the old env. */ + ;; + } + { .mib + st8 [r11] = r16, 8 /* Store it in the new env. */ + cmp.ne p6, p7 = 0, r16 +(p6) br.cond.dptk.few 1b + ;; + } + { .mmb + st8 [r10] = out1 /* Record the new argc. */ + ld8 out0 = [out0] + } + { .mfb + ld8 out0 = [out0] /* get the linkmap */ + br.call.sptk.many b0 = _dl_init# + ;; + } + /* Pass our finializer function to the user, + and jump to the user's entry point. */ + { .mmi + ld8 r3 = [loc2], 8 + mov b0 = r0 + } + { .mmi + addl ret0 = @ltoff(@fptr(_dl_fini#)), gp + ;; + mov b6 = r3 + } + { .mmi + ld8 ret0 = [ret0] + ld8 gp = [loc2] + mov ar.pfs = loc0 + ;; + } + { .mfb + br.sptk.many b6 + ;; + } + .endp _dl_start_user# +.previous"); + + +#ifndef RTLD_START_SPECIAL_INIT +#define RTLD_START_SPECIAL_INIT /* nothing */ +#endif + +/* Nonzero iff TYPE describes relocation of a PLT entry, so + PLT entries should not be allowed to define the value. */ +/* ??? Ignore IPLTMSB for now. */ +#define elf_machine_lookup_noplt_p(type) ((type) == R_IA64_IPLTLSB) + +/* Nonzero iff TYPE should not be allowed to resolve to one of + the main executable's symbols, as for a COPY reloc, which we don't use. */ +#define elf_machine_lookup_noexec_p(type) (0) + +/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ +#define ELF_MACHINE_JMP_SLOT R_IA64_IPLTLSB + +/* According to the IA-64 specific documentation, Rela is always used. */ +#define ELF_MACHINE_NO_REL 1 + +/* Since ia64's stack has to be 16byte aligned, we cannot arbitrarily + move the stack pointer. */ +#define ELF_MACHINE_FIXED_STACK 1 + +/* Return the address of the entry point. */ +extern ElfW(Addr) _dl_start_address (const struct link_map *map, + ElfW(Addr) start); + +#define ELF_MACHINE_START_ADDRESS(map, start) \ + _dl_start_address ((map), (start)) + +#define elf_machine_profile_fixup_plt(l, reloc, rel_addr, value) \ + elf_machine_fixup_plt ((l), (reloc), (rel_addr), (value)) + +#define elf_machine_profile_plt(reloc_addr) ((Elf64_Addr) (reloc_addr)) + +/* Fixup a PLT entry to bounce directly to the function at VALUE. */ +static inline Elf64_Addr +elf_machine_fixup_plt (struct link_map *l, lookup_t t, + const Elf64_Rela *reloc, + Elf64_Addr *reloc_addr, Elf64_Addr value) +{ + /* l is the link_map for the caller, t is the link_map for the object + * being called */ + /* got has already been relocated in elf_get_dynamic_info() */ + reloc_addr[1] = t->l_info[DT_PLTGOT]->d_un.d_ptr; + reloc_addr[0] = value; + return (Elf64_Addr) reloc_addr; +} + +/* Return the final value of a plt relocation. */ +static inline Elf64_Addr +elf_machine_plt_value (struct link_map *map, const Elf64_Rela *reloc, + Elf64_Addr value) +{ + /* No need to handle rel vs rela since IA64 is rela only */ + return value + reloc->r_addend; +} + +#endif /* !dl_machine_h */ + +#ifdef RESOLVE_MAP + +#define R_IA64_TYPE(R) ((R) & -8) +#define R_IA64_FORMAT(R) ((R) & 7) + +#define R_IA64_FORMAT_32MSB 4 +#define R_IA64_FORMAT_32LSB 5 +#define R_IA64_FORMAT_64MSB 6 +#define R_IA64_FORMAT_64LSB 7 + + +/* Perform the relocation specified by RELOC and SYM (which is fully + resolved). MAP is the object containing the reloc. */ +static inline void +elf_machine_rela (struct link_map *map, + const Elf64_Rela *reloc, + const Elf64_Sym *sym, + const struct r_found_version *version, + Elf64_Addr *const reloc_addr) +{ + unsigned long const r_type = ELF64_R_TYPE (reloc->r_info); + Elf64_Addr value; + +#ifndef RTLD_BOOTSTRAP + /* This is defined in rtld.c, but nowhere in the static libc.a; make the + reference weak so static programs can still link. This declaration + cannot be done when compiling rtld.c (i.e. #ifdef RTLD_BOOTSTRAP) + because rtld.c contains the common defn for _dl_rtld_map, which is + incompatible with a weak decl in the same file. */ + weak_extern (_dl_rtld_map); +#endif + + /* We cannot use a switch here because we cannot locate the switch + jump table until we've self-relocated. */ + + if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_REL64LSB)) + { + value = *reloc_addr; +#ifndef RTLD_BOOTSTRAP + /* Already done in dynamic linker. */ + if (map != &_dl_rtld_map) +#endif + value += map->l_addr; + } + else if (r_type == R_IA64_NONE) + return; + else + { + struct link_map *sym_map; + + /* + * RESOLVE_MAP() will return NULL if it fail to locate the symbol + */ + if ((sym_map = RESOLVE_MAP (&sym, version, r_type))) + { + value = sym ? sym_map->l_addr + sym->st_value : 0; + value += reloc->r_addend; + + if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_DIR64LSB)) + ;/* No adjustment. */ + else if (r_type == R_IA64_IPLTLSB) + { + elf_machine_fixup_plt (NULL, sym_map, reloc, reloc_addr, value); + return; + } + else if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_FPTR64LSB)) +#ifndef RTLD_BOOTSTRAP + value = __ia64_make_fptr (sym_map, value, &__fptr_root, NULL); +#else + { + struct ia64_fptr *p_boot_ldso_fptr; + struct ia64_fptr **p_fptr_root; + int *p_fptr_count; + + /* Special care must be taken to address these variables + during bootstrap. Further, since we don't know exactly + when __fptr_next will be relocated, we index directly + off __boot_ldso_fptr. */ + asm ("addl %0 = @gprel(__boot_ldso_fptr#), gp\n\t" + "addl %1 = @gprel(__fptr_root#), gp\n\t" + "addl %2 = @gprel(__fptr_count#), gp" + : "=r"(p_boot_ldso_fptr), + "=r"(p_fptr_root), + "=r"(p_fptr_count)); + + /* + * Go from the top - __ia64_make_fptr goes from the bottom, + * this way we will never clash. + */ + value = __ia64_make_fptr (sym_map, value, p_fptr_root, + &p_boot_ldso_fptr[--*p_fptr_count]); + } +#endif + else if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_PCREL64LSB)) + value -= (Elf64_Addr)reloc_addr & -16; + else + assert (! "unexpected dynamic reloc type"); + } + else + value = 0; + } + + /* ??? Ignore MSB and Instruction format for now. */ + if (R_IA64_FORMAT (r_type) == R_IA64_FORMAT_64LSB) + *reloc_addr = value; + else if (R_IA64_FORMAT (r_type) == R_IA64_FORMAT_32LSB) + *(int *)reloc_addr = value; + else if (r_type == R_IA64_IPLTLSB) + { + reloc_addr[0] = 0; + reloc_addr[1] = 0; + } + else + assert (! "unexpected dynamic reloc format"); +} + + +/* Perform a RELATIVE reloc on the .got entry that transfers to the .plt. */ +static inline void +elf_machine_lazy_rel (struct link_map *map, + Elf64_Addr l_addr, const Elf64_Rela *reloc) +{ + Elf64_Addr * const reloc_addr = (void *)(l_addr + reloc->r_offset); + unsigned long const r_type = ELF64_R_TYPE (reloc->r_info); + + if (r_type == R_IA64_IPLTLSB) + { + reloc_addr[0] += l_addr; + reloc_addr[1] += l_addr; + } + else if (r_type == R_IA64_NONE) + return; + else + assert (! "unexpected PLT reloc type"); +} + +#endif /* RESOLVE_MAP */ diff --git a/sysdeps/ia64/dl-symaddr.c b/sysdeps/ia64/dl-symaddr.c new file mode 100644 index 0000000000..bc3301c707 --- /dev/null +++ b/sysdeps/ia64/dl-symaddr.c @@ -0,0 +1,39 @@ +/* Get the symbol address. IA-64 version. + Copyright (C) 1999, 2000 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 + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <ldsodefs.h> +#include <dl-machine.h> + +void * +_dl_symbol_address (const struct link_map *map, const ElfW(Sym) *ref) +{ + Elf64_Addr value = (map ? map->l_addr : 0) + ref->st_value; + + /* On ia64, we have to return the pointer to function descriptor. */ + if (ELFW(ST_TYPE) (ref->st_info) == STT_FUNC) + return (void *) __ia64_make_fptr (map, value, &__fptr_root, NULL); + else + return (void *) value; +} + +ElfW(Addr) +_dl_start_address (const struct link_map *map, ElfW(Addr) start) +{ + return __ia64_make_fptr (map, start, &__fptr_root, NULL); +} diff --git a/sysdeps/m68k/dl-machine.h b/sysdeps/m68k/dl-machine.h index bf7dede6d2..e4cdf2dd1d 100644 --- a/sysdeps/m68k/dl-machine.h +++ b/sysdeps/m68k/dl-machine.h @@ -209,11 +209,12 @@ _dl_start_user: /* The m68k never uses Elf32_Rel relocations. */ #define ELF_MACHINE_NO_REL 1 -static inline void -elf_machine_fixup_plt (struct link_map *map, const Elf32_Rela *reloc, +static inline Elf32_Addr +elf_machine_fixup_plt (struct link_map *map, lookup_t t, + const Elf32_Rela *reloc, Elf32_Addr *reloc_addr, Elf32_Addr value) { - *reloc_addr = value; + return *reloc_addr = value; } /* Return the final value of a plt relocation. On the m68k the JMP_SLOT diff --git a/sysdeps/powerpc/dl-machine.h b/sysdeps/powerpc/dl-machine.h index 77454b246e..f80544fafd 100644 --- a/sysdeps/powerpc/dl-machine.h +++ b/sysdeps/powerpc/dl-machine.h @@ -1,5 +1,5 @@ /* Machine-dependent ELF dynamic relocation inline functions. PowerPC version. - Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc. + Copyright (C) 1995, 96, 97, 98, 99, 2000 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 @@ -47,8 +47,8 @@ elf_machine_dynamic (void) static inline Elf32_Addr elf_machine_load_address (void) { - unsigned *got; - unsigned *branchaddr; + unsigned int *got; + unsigned int *branchaddr; /* This is much harder than you'd expect. Possibly I'm missing something. The 'obvious' way: @@ -246,11 +246,19 @@ elf_machine_lazy_rel (struct link_map *map, } /* Change the PLT entry whose reloc is 'reloc' to call the actual routine. */ -extern void __elf_machine_fixup_plt(struct link_map *map, - const Elf32_Rela *reloc, - Elf32_Addr *reloc_addr, - Elf32_Addr finaladdr); -#define elf_machine_fixup_plt __elf_machine_fixup_plt +extern Elf32_Addr __elf_machine_fixup_plt (struct link_map *map, + const Elf32_Rela *reloc, + Elf32_Addr *reloc_addr, + Elf32_Addr finaladdr); + +static inline Elf32_Addr +elf_machine_fixup_plt (struct link_map *l, lookup_t t, + const Elf32_Rela *reloc, + Elf32_Addr *reloc_addr, Elf64_Addr value) +{ + __elf_machine_fixup_plt (map, reloc, reloc_addr, finaladdr); + return value; +} /* Return the final value of a plt relocation. */ static inline Elf32_Addr diff --git a/sysdeps/sparc/sparc32/dl-machine.h b/sysdeps/sparc/sparc32/dl-machine.h index a160f7d41f..83deb16594 100644 --- a/sysdeps/sparc/sparc32/dl-machine.h +++ b/sysdeps/sparc/sparc32/dl-machine.h @@ -285,8 +285,9 @@ _dl_start_user: .size _dl_start_user, . - _dl_start_user .previous"); -static inline void -elf_machine_fixup_plt (struct link_map *map, const Elf32_Rela *reloc, +static inline Elf32_Addr +elf_machine_fixup_plt (struct link_map *map, lookup_t t, + const Elf32_Rela *reloc, Elf32_Addr *reloc_addr, Elf32_Addr value) { #ifndef RTLD_BOOTSTRAP @@ -315,6 +316,8 @@ elf_machine_fixup_plt (struct link_map *map, const Elf32_Rela *reloc, reloc_addr[1] = OPCODE_SETHI_G1 | (value >> 10); if (do_flush) __asm __volatile ("flush %0+4" : : "r"(reloc_addr)); + + return value; } /* Return the final value of a plt relocation. */ diff --git a/sysdeps/sparc/sparc64/dl-machine.h b/sysdeps/sparc/sparc64/dl-machine.h index 7b89ebe733..4e8447214a 100644 --- a/sysdeps/sparc/sparc64/dl-machine.h +++ b/sysdeps/sparc/sparc64/dl-machine.h @@ -66,9 +66,10 @@ elf_machine_load_address (void) /* We have 4 cases to handle. And we code different code sequences for each one. I love V9 code models... */ -static inline void -elf_machine_fixup_plt(struct link_map *map, const Elf64_Rela *reloc, - Elf64_Addr *reloc_addr, Elf64_Addr value) +static inline Elf64_Addr +elf_machine_fixup_plt (struct link_map *map, lookup_t t, + const Elf64_Rela *reloc, + Elf64_Addr *reloc_addr, Elf64_Addr value) { unsigned int *insns = (unsigned int *) reloc_addr; Elf64_Addr plt_vaddr = (Elf64_Addr) reloc_addr; @@ -156,6 +157,8 @@ elf_machine_fixup_plt(struct link_map *map, const Elf64_Rela *reloc, insns[1] = 0x03000000 | (high32 >> 10); __asm __volatile ("flush %0 + 4" : : "r" (insns)); } + + return value; } /* Return the final value of a plt relocation. */ |