diff options
Diffstat (limited to 'sysdeps/sh/sh4/dl-machine.h')
| -rw-r--r-- | sysdeps/sh/sh4/dl-machine.h | 517 |
1 files changed, 2 insertions, 515 deletions
diff --git a/sysdeps/sh/sh4/dl-machine.h b/sysdeps/sh/sh4/dl-machine.h index a8de19a719..d0c9115e51 100644 --- a/sysdeps/sh/sh4/dl-machine.h +++ b/sysdeps/sh/sh4/dl-machine.h @@ -1,515 +1,2 @@ -/* Machine-dependent ELF dynamic relocation inline functions. SH-4 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. */ - -#ifndef dl_machine_h -#define dl_machine_h - -/* Only dummy. This doesn't work. */ - -#define ELF_MACHINE_NAME "SH" - -#include <sys/param.h> - -#include <assert.h> - -/* Return nonzero iff E_MACHINE is compatible with the running host. */ -static inline int __attribute__ ((unused)) -elf_machine_matches_host (Elf32_Half e_machine) -{ - switch (e_machine) - { - case EM_SH: - return 1; - default: - return 0; - } -} - - -/* 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 __attribute__ ((unused)) -elf_machine_dynamic (void) -{ - register Elf32_Addr *got; - asm ("mov r12,%0" :"=r" (got)); - return *got; -} - - -/* Return the run-time load address of the shared object. */ -static inline Elf32_Addr __attribute__ ((unused)) -elf_machine_load_address (void) -{ - Elf32_Addr addr; - asm ("mov.l .L1,r0 - mov.l .L3,r2 - add r12,r2 - mov.l @(r0,r12),r0 - bra .L2 - sub r0,r2 - .align 2 - .L1: .long _dl_start@GOT - .L3: .long _dl_start@GOTOFF - .L2: mov r2,%0" - : "=r" (addr) : : "r0", "r1", "r2"); - return addr; -} - - -/* 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 __attribute__ ((unused)) -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 load an - offset into the .rela.plt section and _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 (profile) - { - got[2] = (Elf32_Addr) &_dl_runtime_profile; - /* Say that we really want profiling and the timers are started. */ - _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. */ - -#define ELF_MACHINE_RUNTIME_FIXUP_ARGS int plt_type - -#ifdef SHARED -#define FUN_ADDR "\ - mov.l 1f,r2 - mova 1f,r0 - bra 2f - add r0,r2 ! Get GOT address in r2 -0: .align 2 -1: .long _GLOBAL_OFFSET_TABLE_ -2: mov.l 3f,r0 - add r2,r0" -#define GOTJMP(x) #x "@GOTOFF" -#else -#define FUN_ADDR "\ - mov.l 3f,r0" -#define GOTJMP(x) #x -#endif - -#define FGR_SAVE "\ - sts.l fpscr, @-r15 - mov #8,r3 - swap.w r3, r3 - lds r3, fpscr - fmov.s fr11, @-r15 - fmov.s fr10, @-r15 - fmov.s fr9, @-r15 - fmov.s fr8, @-r15 - fmov.s fr7, @-r15 - fmov.s fr6, @-r15 - fmov.s fr5, @-r15 - fmov.s fr4, @-r15" -#define FGR_LOAD "\ - fmov.s @r15+, fr4 - fmov.s @r15+, fr5 - fmov.s @r15+, fr6 - fmov.s @r15+, fr7 - fmov.s @r15+, fr8 - fmov.s @r15+, fr9 - fmov.s @r15+, fr10 - fmov.s @r15+, fr11 - lds.l @r15+, fpscr" - -#ifndef PROF -# define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\ - .text - .globl _dl_runtime_resolve - .type _dl_runtime_resolve, @function - .align 5 -_dl_runtime_resolve: - mov.l r3,@-r15 - mov.l r4,@-r15 - mov.l r5,@-r15 - mov.l r6,@-r15 - mov.l r7,@-r15 - mov.l r12,@-r15 - movt r3 ! Save T flag. - mov.l r3,@-r15 - " FGR_SAVE " - sts.l pr,@-r15 - mov r0,r4 ! PLT type - mov r2,r5 ! link map address - " FUN_ADDR " - jsr @r0 ! Call resolver. - mov r1,r6 ! reloc offset - lds.l @r15+,pr ! Get register content back. - " FGR_LOAD " - mov.l @r15+,r3 - shal r3 ! Lode T flag. - mov.l @r15+,r12 - mov.l @r15+,r7 - mov.l @r15+,r6 - mov.l @r15+,r5 - mov.l @r15+,r4 - jmp @r0 ! Jump to function address. - mov.l @r15+,r3 - .align 2 -3: - .long " GOTJMP (fixup) " - .size _dl_runtime_resolve, .-_dl_runtime_resolve - - .globl _dl_runtime_profile - .type _dl_runtime_profile, @function - .align 5 -_dl_runtime_profile: - mov.l r3,@-r15 - mov.l r4,@-r15 - mov.l r5,@-r15 - mov.l r6,@-r15 - mov.l r7,@-r15 - mov.l r12,@-r15 - movt r3 ! Save T flag. - mov.l r3,@-r15 - " FGR_SAVE " - sts.l pr,@-r15 - mov r0,r4 ! PLT type - mov r2,r5 ! link map address - sts pr,r7 ! return address - " FUN_ADDR " - jsr @r0 ! Call resolver. - mov r1,r6 ! reloc offset - lds.l @r15+,pr ! Get register content back. - " FGR_LOAD " - mov.l @r15+,r3 - shal r3 ! Lode T flag. - mov.l @r15+,r12 - mov.l @r15+,r7 - mov.l @r15+,r6 - mov.l @r15+,r5 - mov.l @r15+,r4 - jmp @r0 ! Jump to function address. - mov.l @r15+,r3 - .align 2 -3: - .long " GOTJMP (profile_fixup) " - .size _dl_runtime_profile, .-_dl_runtime_profile - .previous -"); -#else -# define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\ - .text - .globl _dl_runtime_resolve - .globl _dl_runtime_profile - .type _dl_runtime_resolve, @function - .type _dl_runtime_profile, @function - .align 5 -_dl_runtime_resolve: -_dl_runtime_profile: - mov.l r3,@-r15 - mov.l r4,@-r15 - mov.l r5,@-r15 - mov.l r6,@-r15 - mov.l r7,@-r15 - mov.l r12,@-r15 - movt r3 ! Save T flag. - mov.l r3,@-r15 - " FGR_SAVE " - sts.l pr,@-r15 - mov r0,r4 ! PLT type - mov r2,r5 ! link map address - sts pr,r7 ! return address - " FUN_ADDR " - jsr @r0 ! Call resolver. - mov r1,r6 ! reloc offset - lds.l @r15+,pr ! Get register content back. - " FGR_LOAD " - mov.l @r15+,r3 - shal r3 ! Lode T flag. - mov.l @r15+,r12 - mov.l @r15+,r7 - mov.l @r15+,r6 - mov.l @r15+,r5 - mov.l @r15+,r4 - jmp @r0 ! Jump to function address. - mov.l @r15+,r3 - .align 2 -3: - .long " GOTJMP (fixup) " - .size _dl_runtime_resolve, .-_dl_runtime_resolve - .size _dl_runtime_profile, .-_dl_runtime_profile - .previous -"); -#endif - -/* Mask identifying addresses reserved for the user program, - where the dynamic linker should not map anything. */ -#define ELF_MACHINE_USER_ADDRESS_MASK 0x80000000UL - -/* 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\ -.globl _dl_start_user\n\ -_start:\n\ - mov r15,r4\n\ - mov.l .L_dl_start,r1\n\ - mova .L_dl_start,r0\n\ - add r1,r0\n\ - jsr @r0\n\ - nop\n\ -_dl_start_user:\n\ - ! Save the user entry point address in r8.\n\ - mov r0,r8\n\ - ! Point r12 at the GOT.\n\ - mov.l 1f,r12\n\ - mova 1f,r0\n\ - bra 2f\n\ - add r0,r12\n\ - .align 2\n\ -1: .long _GLOBAL_OFFSET_TABLE_\n\ -2: ! Store the highest stack address\n\ - mov.l .L_stack_end,r0\n\ - mov.l @(r0,r12),r0\n\ - mov.l r15,@r0\n\ - ! See if we were run as a command with the executable file\n\ - ! name as an extra leading argument.\n\ - mov.l .L_dl_skip_args,r0\n\ - mov.l @(r0,r12),r0\n\ - mov.l @r0,r0\n\ - ! Get the original argument count.\n\ - mov.l @r15,r5\n\ - ! Subtract _dl_skip_args from it.\n\ - sub r0,r5\n\ - ! Adjust the stack pointer to skip _dl_skip_args words.\n\ - shll2 r0\n\ - add r0,r15\n\ - ! Store back the modified argument count.\n\ - mov.l r5,@r15\n\ - ! Compute argv address and envp.\n\ - mov r15,r6\n\ - add #4,r6\n\ - mov r5,r7\n\ - shll2 r7\n\ - add r15,r7\n\ - mov.l .L_dl_loaded,r0\n\ - mov.l @(r0,r12),r0\n\ - mov.l @r0,r4\n\ - ! Call _dl_init.\n\ - mov.l .L_dl_init,r1\n\ - mova .L_dl_init,r0\n\ - add r1,r0\n\ - jsr @r0\n\ - nop\n\ -1: ! Clear the startup flag.\n\ - mov.l .L_dl_starting_up,r0\n\ - mov.l @(r0,r12),r0\n\ - mov #0,r2\n\ - mov.l r2,@r0\n\ - ! Pass our finalizer function to the user in r4, as per ELF ABI.\n\ - mov.l .L_dl_fini,r0\n\ - mov.l @(r0,r12),r4\n\ - ! Jump to the user's entry point.\n\ - jmp @r8\n\ - nop\n\ - .align 2\n\ -.L_dl_start:\n\ - .long _dl_start@PLT\n\ -.L_stack_end:\n\ - .long __libc_stack_end@GOT\n\ -.L_dl_skip_args:\n\ - .long _dl_skip_args@GOT\n\ -.L_dl_init:\n\ - .long _dl_init@PLT\n\ -.L_dl_loaded:\n\ - .long _dl_loaded@GOT\n\ -.L_dl_starting_up:\n\ - .long _dl_starting_up@GOT\n\ -.L_dl_fini:\n\ - .long _dl_fini@GOT\n\ -.previous\n\ -"); - -/* Nonzero iff TYPE should not be allowed to resolve to one of - the main executable's symbols, as for a COPY reloc. */ -#define elf_machine_lookup_noexec_p(type) ((type) == R_SH_COPY) - -/* Nonzero iff TYPE describes relocation of a PLT entry, so - PLT entries should not be allowed to define the value. */ -#define elf_machine_lookup_noplt_p(type) ((type) == R_SH_JMP_SLOT) - -/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ -#define ELF_MACHINE_JMP_SLOT R_SH_JMP_SLOT - -/* We define an initialization functions. This is called very early in - _dl_sysdep_start. */ -#define DL_PLATFORM_INIT dl_platform_init () - -extern const char *_dl_platform; - -static inline void __attribute__ ((unused)) -dl_platform_init (void) -{ - if (_dl_platform != NULL && *_dl_platform == '\0') - /* Avoid an empty string which would disturb us. */ - _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 - -/* SH never uses Elf32_Rel relocations. */ -#define ELF_MACHINE_NO_REL 1 - -extern char **_dl_argv; - -/* 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, - Elf32_Addr *const reloc_addr) -{ - if (ELF32_R_TYPE (reloc->r_info) == R_SH_RELATIVE) - { -#ifndef RTLD_BOOTSTRAP - if (map != &_dl_rtld_map) /* Already done in rtld itself. */ -#endif - *reloc_addr = map->l_addr + reloc->r_addend; - } - else if (ELF32_R_TYPE (reloc->r_info) != R_SH_NONE) - { - const Elf32_Sym *const refsym = sym; - Elf32_Addr value = RESOLVE (&sym, version, ELF32_R_TYPE (reloc->r_info)); - if (sym) - value += sym->st_value; - value += reloc->r_addend; - - switch (ELF32_R_TYPE (reloc->r_info)) - { - case R_SH_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 - || (sym->st_size < refsym->st_size && _dl_verbose)) - { - const char *strtab; - - strtab = (const char *) D_PTR (map, l_info[DT_STRTAB]); - _dl_sysdep_error (_dl_argv[0] ?: "<program name unknown>", - ": Symbol `", strtab + refsym->st_name, - "' has different size in shared object, " - "consider re-linking\n", NULL); - } - memcpy (reloc_addr, (void *) value, MIN (sym->st_size, - refsym->st_size)); - break; - case R_SH_GLOB_DAT: - case R_SH_JMP_SLOT: - *reloc_addr = value; - break; - case R_SH_DIR32: - { -#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); - if (map == &_dl_rtld_map) - /* Undo the relocation done here during bootstrapping. - Now we will relocate it anew, possibly using a - binding found in the user program or a loaded library - rather than the dynamic linker's built-in definitions - used while loading those libraries. */ - value -= map->l_addr + refsym->st_value + reloc->r_addend; -#endif - *reloc_addr = value; - break; - } - case R_SH_REL32: - *reloc_addr = (value - (Elf32_Addr) reloc_addr); - break; - default: - _dl_reloc_bad_type (map, ELF32_R_TYPE (reloc->r_info), 0); - break; - } - } -} - -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); - /* Check for unexpected PLT reloc type. */ - if (ELF32_R_TYPE (reloc->r_info) == R_SH_JMP_SLOT) - *reloc_addr += l_addr; - else - _dl_reloc_bad_type (map, ELF32_R_TYPE (reloc->r_info), 1); -} - -#endif /* RESOLVE */ +#define KERNEL_MATH_EMULATION +#include <sysdeps/sh/dl-machine.h> |