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Diffstat (limited to 'sysdeps/cris/dl-machine.h')
| -rw-r--r-- | sysdeps/cris/dl-machine.h | 391 |
1 files changed, 0 insertions, 391 deletions
diff --git a/sysdeps/cris/dl-machine.h b/sysdeps/cris/dl-machine.h deleted file mode 100644 index 368733e73f..0000000000 --- a/sysdeps/cris/dl-machine.h +++ /dev/null @@ -1,391 +0,0 @@ -/* Machine-dependent ELF dynamic relocation inline functions. CRIS version. - Copyright (C) 1996-2001, 2002, 2003 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 Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; 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 - -#define ELF_MACHINE_NAME "CRIS" - -#include <sys/param.h> - -#ifdef __PIC__ -# define CALL_FN(x) \ - "move.d $pc,$r9\n\t" \ - "add.d " #x " - .,$r9\n\t" \ - "jsr $r9" -#else -# define CALL_FN(x) "jsr " #x -#endif - -/* Return nonzero iff ELF header is compatible with the running host. */ - -static inline int -elf_machine_matches_host (const Elf32_Ehdr *ehdr) -{ - return ehdr->e_machine == EM_CRIS; -} - -/* Return the link-time address of _DYNAMIC. Conveniently, this is the - first element of the GOT. This must be inlined in a function which - uses global data. */ - -static inline Elf32_Addr -elf_machine_dynamic (void) -{ - /* Don't just set this to an asm variable "r0" since that's not logical - (like, the variable is uninitialized and the register is fixed) and - may make GCC trip over itself doing register allocation. Yes, I'm - paranoid. Why do you ask? */ - Elf32_Addr *got; - - __asm__ ("move.d $r0,%0" : "=rm" (got)); - return *got; -} - -/* Return the run-time load address of the shared object. We do it like - m68k and i386, by taking an arbitrary local symbol, forcing a GOT entry - for it, and peeking into the GOT table, which is set to the link-time - file-relative symbol value (regardless of whether the target is REL or - RELA). We subtract this link-time file-relative value from the "local" - value we calculate from GOT position and GOT offset. FIXME: Perhaps - there's some other symbol we could use, that we don't *have* to force a - GOT entry for. */ - -static inline Elf32_Addr -elf_machine_load_address (void) -{ - Elf32_Addr gotaddr_diff; - __asm__ ("sub.d [$r0+_dl_start:GOT16],$r0,%0\n\t" - "add.d _dl_start:GOTOFF,%0" : "=r" (gotaddr_diff)); - return gotaddr_diff; -} - -/* 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) -{ - Elf32_Addr *got; - extern void _dl_runtime_resolve (Elf32_Word); - extern void _dl_runtime_profile (Elf32_Word); - - if (l->l_info[DT_JMPREL] && lazy) - { - /* The GOT entries for functions in the PLT have not yet been - filled in. Their initial contents will arrange when called - to push an offset into the .rela.plt section, push - _GLOBAL_OFFSET_TABLE_[1], and then jump to - _GLOBAL_OFFSET_TABLE_[2]. */ - got = (Elf32_Addr *) D_PTR (l, l_info[DT_PLTGOT]); - got[1] = (Elf32_Addr) l; /* Identify this shared object. */ - - /* The got[2] entry contains the address of a function which gets - called to get the address of a so far unresolved function and - jump to it. The profiling extension of the dynamic linker allows - to intercept the calls to collect information. In this case we - don't store the address in the GOT so that all future calls also - end in this function. */ - if (__builtin_expect (profile, 0)) - { - got[2] = (Elf32_Addr) &_dl_runtime_profile; - - if (_dl_name_match_p (GL(dl_profile), l)) - { - /* This is the object we are looking for. Say that we really - want profiling and the timers are started. */ - GL(dl_profile_map) = l; - } - } - else - /* This function will get called to fix up the GOT entry indicated by - the offset on the stack, and then jump to the resolved address. */ - got[2] = (Elf32_Addr) &_dl_runtime_resolve; - } - - return lazy; -} - -/* This code is used in dl-runtime.c to call the `fixup' function - and then redirect to the address it returns. - - We get here with the offset into the relocation table pushed on stack, - and the link map in MOF. */ - -#define TRAMPOLINE_TEMPLATE(tramp_name, fixup_name) \ -"; Trampoline for " #fixup_name "\n\ - .globl " #tramp_name "\n\ - .type " #tramp_name ", @function\n\ -" #tramp_name ":\n\ - push $r13\n\ - push $r12\n\ - push $r11\n\ - push $r10\n\ - push $r9\n\ - push $srp\n\ - move.d [$sp+6*4],$r11\n\ - move $mof,$r10\n\ - " CALL_FN (fixup_name) "\n\ - move.d $r10,[$sp+6*4]\n\ - pop $srp\n\ - pop $r9\n\ - pop $r10\n\ - pop $r11\n\ - pop $r12\n\ - pop $r13\n\ - jump [$sp+]\n\ - .size " #tramp_name ", . - " #tramp_name "\n" -#ifndef PROF -#define ELF_MACHINE_RUNTIME_TRAMPOLINE \ -asm (TRAMPOLINE_TEMPLATE (_dl_runtime_resolve, fixup) \ - TRAMPOLINE_TEMPLATE (_dl_runtime_profile, profile_fixup)); -#else -#define ELF_MACHINE_RUNTIME_TRAMPOLINE \ -asm (TRAMPOLINE_TEMPLATE (_dl_runtime_resolve, fixup) \ - ".globl _dl_runtime_profile\n" \ - ".set _dl_runtime_profile, _dl_runtime_resolve"); -#endif - - -/* Mask identifying addresses reserved for the user program, - where the dynamic linker should not map anything. */ -#define ELF_MACHINE_USER_ADDRESS_MASK 0xf8000000UL - -/* 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\n\ - .globl _start\n\ - .type _start,@function\n\ -_start:\n\ - move.d $sp,$r10\n\ - " CALL_FN (_dl_start) "\n\ - /* FALLTHRU */\n\ -\n\ - .globl _dl_start_user\n\ - .type _dl_start_user,@function\n\ -_dl_start_user:\n\ - ; Save the user entry point address in R1.\n\ - move.d $r10,$r1\n\ - ; Point R0 at the GOT.\n\ - move.d $pc,$r0\n\ - sub.d .:GOTOFF,$r0\n\ - ; See if we were run as a command with the executable file\n\ - ; name as an extra leading argument.\n\ - move.d [$r0+_dl_skip_args:GOT16],$r13\n\ - move.d [$r13],$r9\n\ - ; Get the original argument count\n\ - move.d [$sp],$r11\n\ - ; Subtract _dl_skip_args from it.\n\ - sub.d $r9,$r11\n\ - ; Adjust the stack pointer to skip _dl_skip_args words.\n\ - addi $r9.d,$sp\n\ - ; Put the new argc in place as expected by the user entry.\n\ - move.d $r11,[$sp]\n\ - ; Call _dl_init (struct link_map *main_map, int argc, char **argv, char **env)\n\ - ; env: skip scaled argc and skip stored argc and NULL at end of argv[].\n\ - move.d $sp,$r13\n\ - addi $r11.d,$r13\n\ - addq 8,$r13\n\ - ; argv: skip stored argc.\n\ - move.d $sp,$r12\n\ - addq 4,$r12\n\ - ; main_map: at _dl_loaded.\n\ - move.d [$r0+_rtld_local:GOT16],$r9\n\ - move.d [$r9],$r10\n\ - move.d _dl_init_internal:PLTG,$r9\n\ - add.d $r0,$r9\n\ - jsr $r9\n\ - ; Pass our finalizer function to the user in R10.\n\ - move.d [$r0+_dl_fini:GOT16],$r10\n\ - ; Terminate the frame-pointer.\n\ - moveq 0,$r8\n\ - ; Cause SEGV if user entry returns.\n\ - move $r8,$srp\n\ - ; Jump to the user's entry point.\n\ - jump $r1\n\ - .size _dl_start_user, . - _dl_start_user\n\ - .previous"); - -/* The union of reloc-type-classes where the reloc TYPE is a member. - - TYPE is in the class ELF_RTYPE_CLASS_PLT if it can describe a - relocation for a PLT entry, that is, for which a PLT entry should not - be allowed to define the value. The GNU linker for CRIS can merge a - .got.plt entry (R_CRIS_JUMP_SLOT) with a .got entry (R_CRIS_GLOB_DAT), - so we need to match both these reloc types. - - TYPE is in the class ELF_RTYPE_CLASS_NOCOPY if it should not be allowed - to resolve to one of the main executable's symbols, as for a COPY - reloc. */ -#define elf_machine_type_class(type) \ - ((((((type) == R_CRIS_JUMP_SLOT)) \ - || ((type) == R_CRIS_GLOB_DAT)) * ELF_RTYPE_CLASS_PLT) \ - | (((type) == R_CRIS_COPY) * ELF_RTYPE_CLASS_COPY)) - -/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ -#define ELF_MACHINE_JMP_SLOT R_CRIS_JUMP_SLOT - -/* CRIS never uses Elf32_Rel relocations. */ -#define ELF_MACHINE_NO_REL 1 - -/* We define an initialization functions. This is called very early in - _dl_sysdep_start. */ -#define DL_PLATFORM_INIT dl_platform_init () - -static inline void __attribute__ ((unused)) -dl_platform_init (void) -{ - if (GL(dl_platform) != NULL && *GL(dl_platform) == '\0') - /* Avoid an empty string which would disturb us. */ - GL(dl_platform) = NULL; -} - -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) -{ - return *reloc_addr = value; -} - -/* Return the final value of a plt relocation. */ -static inline Elf32_Addr -elf_machine_plt_value (struct link_map *map, const Elf32_Rela *reloc, - Elf32_Addr value) -{ - return value + reloc->r_addend; -} - -#endif /* !dl_machine_h */ - -#ifdef RESOLVE - -/* 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 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 unsigned int r_type = ELF32_R_TYPE (reloc->r_info); - - if (__builtin_expect (r_type == R_CRIS_RELATIVE, 0)) - *reloc_addr = map->l_addr + reloc->r_addend; - else - { -#ifndef RTLD_BOOTSTRAP - const Elf32_Sym *const refsym = sym; -#endif - Elf32_Addr value; - if (sym->st_shndx != SHN_UNDEF - && ELF32_ST_BIND (sym->st_info) == STB_LOCAL) - value = map->l_addr; - else - { - value = RESOLVE (&sym, version, r_type); - if (sym) - value += sym->st_value; - } - value += reloc->r_addend; /* Assume copy relocs have zero addend. */ - - switch (r_type) - { -#ifndef RTLD_BOOTSTRAP - case R_CRIS_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 - || (GL(dl_verbose) && sym->st_size < refsym->st_size)) - { - const char *strtab; - - 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; - - case R_CRIS_32: -#endif - case R_CRIS_GLOB_DAT: - case R_CRIS_JUMP_SLOT: - *reloc_addr = value; - break; -#ifndef RTLD_BOOTSTRAP - case R_CRIS_8: - *(char *) reloc_addr = value; - break; - case R_CRIS_16: - *(short *) reloc_addr = value; - break; - case R_CRIS_8_PCREL: - *(char *) reloc_addr - = value + reloc->r_addend - (Elf32_Addr) reloc_addr - 1; - break; - case R_CRIS_16_PCREL: - *(short *) reloc_addr - = value + reloc->r_addend - (Elf32_Addr) reloc_addr - 2; - break; - case R_CRIS_32_PCREL: - *reloc_addr = value + reloc->r_addend - (Elf32_Addr) reloc_addr - 4; - break; -#endif - case R_CRIS_NONE: - break; -#if !defined RTLD_BOOTSTRAP || defined _NDEBUG - default: - _dl_reloc_bad_type (map, r_type, 0); - break; -#endif - } - } -} - -static inline void -elf_machine_rela_relative (Elf32_Addr l_addr, const Elf32_Rela *reloc, - void *const reloc_addr_arg) -{ - Elf32_Addr *const reloc_addr = reloc_addr_arg; - *reloc_addr = l_addr + reloc->r_addend; -} - -static inline void -elf_machine_lazy_rel (struct link_map *map, - Elf32_Addr l_addr, const Elf32_Rela *reloc) -{ - Elf32_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset); - const unsigned int r_type = ELF32_R_TYPE (reloc->r_info); - if (__builtin_expect (r_type == R_CRIS_JUMP_SLOT, 1)) - *reloc_addr += l_addr; - else - _dl_reloc_bad_type (map, r_type, 1); -} - -#endif /* RESOLVE */ |