diff options
Diffstat (limited to 'libebl/ppc_symbol.c')
| -rw-r--r-- | libebl/ppc_symbol.c | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/libebl/ppc_symbol.c b/libebl/ppc_symbol.c deleted file mode 100644 index f161d70e..00000000 --- a/libebl/ppc_symbol.c +++ /dev/null @@ -1,143 +0,0 @@ -/* PPC specific symbolic name handling. - Copyright (C) 2004, 2005 Red Hat, Inc. - Written by Ulrich Drepper <[email protected]>, 2004. - - This program is Open Source software; you can redistribute it and/or - modify it under the terms of the Open Software License version 1.0 as - published by the Open Source Initiative. - - You should have received a copy of the Open Software License along - with this program; if not, you may obtain a copy of the Open Software - License version 1.0 from http://www.opensource.org/licenses/osl.php or - by writing the Open Source Initiative c/o Lawrence Rosen, Esq., - 3001 King Ranch Road, Ukiah, CA 95482. */ - -#ifdef HAVE_CONFIG_H -# include <config.h> -#endif - -#include <assert.h> -#include <elf.h> -#include <stddef.h> -#include <string.h> - -#define BACKEND ppc_ -#include "libebl_CPU.h" - - -/* Check for the simple reloc types. */ -Elf_Type -ppc_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type) -{ - switch (type) - { - case R_PPC_ADDR32: - case R_PPC_UADDR32: - return ELF_T_WORD; - case R_PPC_UADDR16: - return ELF_T_HALF; - default: - return ELF_T_NUM; - } -} - - -const char * -ppc_dynamic_tag_name (int64_t tag, char *buf __attribute__ ((unused)), - size_t len __attribute__ ((unused))) -{ - switch (tag) - { - case DT_PPC_GOT: - return "PPC_GOT"; - default: - break; - } - return NULL; -} - - -bool -ppc_dynamic_tag_check (int64_t tag) -{ - return tag == DT_PPC_GOT; -} - - -/* Look for DT_PPC_GOT. */ -static bool -find_dyn_got (Elf *elf, GElf_Ehdr *ehdr, GElf_Addr *addr) -{ - for (int i = 0; i < ehdr->e_phnum; ++i) - { - GElf_Phdr phdr_mem; - GElf_Phdr *phdr = gelf_getphdr (elf, i, &phdr_mem); - if (phdr == NULL || phdr->p_type != PT_DYNAMIC) - continue; - - Elf_Scn *scn = gelf_offscn (elf, phdr->p_offset); - GElf_Shdr shdr_mem; - GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem); - Elf_Data *data = elf_getdata (scn, NULL); - if (shdr != NULL && shdr->sh_type == SHT_DYNAMIC && data != NULL) - for (unsigned int j = 0; j < shdr->sh_size / shdr->sh_entsize; ++j) - { - GElf_Dyn dyn_mem; - GElf_Dyn *dyn = gelf_getdyn (data, j, &dyn_mem); - if (dyn != NULL && dyn->d_tag == DT_PPC_GOT) - { - *addr = dyn->d_un.d_ptr; - return true; - } - } - - /* There is only one PT_DYNAMIC entry. */ - break; - } - - return false; -} - - -/* Check whether given symbol's st_value and st_size are OK despite failing - normal checks. */ -bool -ppc_check_special_symbol (Elf *elf, GElf_Ehdr *ehdr, const GElf_Sym *sym, - const char *name, const GElf_Shdr *destshdr) -{ - if (name == NULL) - return false; - - if (strcmp (name, "_GLOBAL_OFFSET_TABLE_") == 0) - { - GElf_Addr gotaddr; - if (find_dyn_got (elf, ehdr, &gotaddr)) - return sym->st_value == gotaddr; - return sym->st_value == destshdr->sh_addr + 4; - } - - const char *sname = elf_strptr (elf, ehdr->e_shstrndx, destshdr->sh_name); - if (sname == NULL) - return false; - - if (strcmp (name, "_SDA_BASE_") == 0) - return (strcmp (sname, ".sdata") == 0 - && sym->st_value == destshdr->sh_addr + 0x8000 - && sym->st_size == 0); - - if (strcmp (name, "_SDA2_BASE_") == 0) - return (strcmp (sname, ".sdata2") == 0 - && sym->st_value == destshdr->sh_addr + 0x8000 - && sym->st_size == 0); - - return false; -} - - -/* Check if backend uses a bss PLT in this file. */ -bool -ppc_bss_plt_p (Elf *elf, GElf_Ehdr *ehdr) -{ - GElf_Addr addr; - return ! find_dyn_got (elf, ehdr, &addr); -} |