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/*
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* Generic Dynamic compiler generator
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* The COFF object format support was extracted from Kazu's QEMU port
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* to Win32.
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*
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* Mach-O Support by Matt Reda and Pierre d'Herbemont
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <stdarg.h> |
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#include <inttypes.h> |
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#include <unistd.h> |
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#include <fcntl.h> |
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#include "config-host.h" |
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/* NOTE: we test CONFIG_WIN32 instead of _WIN32 to enabled cross
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compilation */
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#if defined(CONFIG_WIN32)
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#define CONFIG_FORMAT_COFF
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#elif defined(CONFIG_DARWIN)
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#define CONFIG_FORMAT_MACH
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#else
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#define CONFIG_FORMAT_ELF
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#endif
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#ifdef CONFIG_FORMAT_ELF
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/* elf format definitions. We use these macros to test the CPU to
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allow cross compilation (this tool must be ran on the build
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platform) */
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#if defined(HOST_I386)
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#define ELF_CLASS ELFCLASS32
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#define ELF_ARCH EM_386
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#define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
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#undef ELF_USES_RELOCA
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#elif defined(HOST_X86_64)
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#define ELF_CLASS ELFCLASS64
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#define ELF_ARCH EM_X86_64
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#define elf_check_arch(x) ((x) == EM_X86_64)
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#define ELF_USES_RELOCA
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#elif defined(HOST_PPC)
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#define ELF_CLASS ELFCLASS32
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#define ELF_ARCH EM_PPC
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#define elf_check_arch(x) ((x) == EM_PPC)
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#define ELF_USES_RELOCA
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#elif defined(HOST_S390)
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#define ELF_CLASS ELFCLASS32
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#define ELF_ARCH EM_S390
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#define elf_check_arch(x) ((x) == EM_S390)
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#define ELF_USES_RELOCA
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#elif defined(HOST_ALPHA)
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#define ELF_CLASS ELFCLASS64
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#define ELF_ARCH EM_ALPHA
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#define elf_check_arch(x) ((x) == EM_ALPHA)
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#define ELF_USES_RELOCA
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#elif defined(HOST_IA64)
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#define ELF_CLASS ELFCLASS64
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#define ELF_ARCH EM_IA_64
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#define elf_check_arch(x) ((x) == EM_IA_64)
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#define ELF_USES_RELOCA
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#elif defined(HOST_SPARC)
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#define ELF_CLASS ELFCLASS32
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#define ELF_ARCH EM_SPARC
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#define elf_check_arch(x) ((x) == EM_SPARC || (x) == EM_SPARC32PLUS)
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#define ELF_USES_RELOCA
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#elif defined(HOST_SPARC64)
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#define ELF_CLASS ELFCLASS64
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#define ELF_ARCH EM_SPARCV9
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#define elf_check_arch(x) ((x) == EM_SPARCV9)
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#define ELF_USES_RELOCA
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#elif defined(HOST_ARM)
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#define ELF_CLASS ELFCLASS32
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#define ELF_ARCH EM_ARM
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#define elf_check_arch(x) ((x) == EM_ARM)
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#define ELF_USES_RELOC
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#elif defined(HOST_M68K)
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#define ELF_CLASS ELFCLASS32
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#define ELF_ARCH EM_68K
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#define elf_check_arch(x) ((x) == EM_68K)
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#define ELF_USES_RELOCA
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#else
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#error unsupported CPU - please update the code
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#endif
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#include "elf.h" |
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#if ELF_CLASS == ELFCLASS32
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typedef int32_t host_long;
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typedef uint32_t host_ulong;
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#define swabls(x) swab32s(x)
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#else
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typedef int64_t host_long;
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typedef uint64_t host_ulong;
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#define swabls(x) swab64s(x)
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#endif
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#ifdef ELF_USES_RELOCA
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#define SHT_RELOC SHT_RELA
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#else
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#define SHT_RELOC SHT_REL
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#endif
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#define EXE_RELOC ELF_RELOC
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#define EXE_SYM ElfW(Sym)
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#endif /* CONFIG_FORMAT_ELF */ |
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#ifdef CONFIG_FORMAT_COFF
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#include "a.out.h" |
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typedef int32_t host_long;
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typedef uint32_t host_ulong;
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#define FILENAMELEN 256 |
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typedef struct coff_sym { |
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struct external_syment *st_syment;
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char st_name[FILENAMELEN];
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uint32_t st_value; |
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int st_size;
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uint8_t st_type; |
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uint8_t st_shndx; |
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} coff_Sym; |
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typedef struct coff_rel { |
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struct external_reloc *r_reloc;
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int r_offset;
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uint8_t r_type; |
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} coff_Rel; |
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#define EXE_RELOC struct coff_rel |
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#define EXE_SYM struct coff_sym |
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#endif /* CONFIG_FORMAT_COFF */ |
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#ifdef CONFIG_FORMAT_MACH
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#include <mach-o/loader.h> |
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#include <mach-o/nlist.h> |
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#include <mach-o/reloc.h> |
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#include <mach-o/ppc/reloc.h> |
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# define check_mach_header(x) (x.magic == MH_MAGIC)
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typedef int32_t host_long;
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typedef uint32_t host_ulong;
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struct nlist_extended
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{ |
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union {
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char *n_name;
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long n_strx;
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} n_un; |
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unsigned char n_type; |
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unsigned char n_sect; |
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short st_desc;
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unsigned long st_value; |
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unsigned long st_size; |
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}; |
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#define EXE_RELOC struct relocation_info |
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#define EXE_SYM struct nlist_extended |
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#endif /* CONFIG_FORMAT_MACH */ |
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#include "bswap.h" |
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enum {
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OUT_GEN_OP, |
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OUT_CODE, |
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OUT_INDEX_OP, |
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}; |
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/* all dynamically generated functions begin with this code */
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#define OP_PREFIX "op_" |
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int do_swap;
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void __attribute__((noreturn)) __attribute__((format (printf, 1, 2))) error(const char *fmt, ...) |
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{ |
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va_list ap; |
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va_start(ap, fmt); |
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fprintf(stderr, "dyngen: ");
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vfprintf(stderr, fmt, ap); |
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fprintf(stderr, "\n");
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va_end(ap); |
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exit(1);
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} |
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void *load_data(int fd, long offset, unsigned int size) |
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{ |
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char *data;
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data = malloc(size); |
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if (!data)
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return NULL; |
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lseek(fd, offset, SEEK_SET); |
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if (read(fd, data, size) != size) {
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free(data); |
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return NULL; |
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} |
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return data;
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} |
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int strstart(const char *str, const char *val, const char **ptr) |
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{ |
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const char *p, *q; |
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p = str; |
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q = val; |
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while (*q != '\0') { |
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if (*p != *q)
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return 0; |
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p++; |
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q++; |
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} |
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if (ptr)
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*ptr = p; |
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return 1; |
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} |
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void pstrcpy(char *buf, int buf_size, const char *str) |
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{ |
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int c;
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char *q = buf;
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if (buf_size <= 0) |
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return;
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for(;;) {
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c = *str++; |
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if (c == 0 || q >= buf + buf_size - 1) |
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break;
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*q++ = c; |
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} |
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*q = '\0';
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} |
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void swab16s(uint16_t *p)
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{ |
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*p = bswap16(*p); |
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} |
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void swab32s(uint32_t *p)
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{ |
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*p = bswap32(*p); |
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} |
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void swab64s(uint64_t *p)
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{ |
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*p = bswap64(*p); |
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} |
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uint16_t get16(uint16_t *p) |
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{ |
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uint16_t val; |
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val = *p; |
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if (do_swap)
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val = bswap16(val); |
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return val;
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} |
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uint32_t get32(uint32_t *p) |
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{ |
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uint32_t val; |
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val = *p; |
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if (do_swap)
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val = bswap32(val); |
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return val;
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} |
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void put16(uint16_t *p, uint16_t val)
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{ |
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if (do_swap)
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val = bswap16(val); |
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*p = val; |
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} |
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void put32(uint32_t *p, uint32_t val)
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{ |
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if (do_swap)
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val = bswap32(val); |
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*p = val; |
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} |
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/* executable information */
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EXE_SYM *symtab; |
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int nb_syms;
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int text_shndx;
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uint8_t *text; |
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EXE_RELOC *relocs; |
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int nb_relocs;
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#ifdef CONFIG_FORMAT_ELF
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/* ELF file info */
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struct elf_shdr *shdr;
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uint8_t **sdata; |
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struct elfhdr ehdr;
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char *strtab;
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int elf_must_swap(struct elfhdr *h) |
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{ |
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union {
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uint32_t i; |
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uint8_t b[4];
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} swaptest; |
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swaptest.i = 1;
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return (h->e_ident[EI_DATA] == ELFDATA2MSB) !=
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(swaptest.b[0] == 0); |
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} |
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void elf_swap_ehdr(struct elfhdr *h) |
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{ |
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swab16s(&h->e_type); /* Object file type */
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swab16s(&h-> e_machine); /* Architecture */
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swab32s(&h-> e_version); /* Object file version */
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swabls(&h-> e_entry); /* Entry point virtual address */
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swabls(&h-> e_phoff); /* Program header table file offset */
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swabls(&h-> e_shoff); /* Section header table file offset */
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swab32s(&h-> e_flags); /* Processor-specific flags */
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swab16s(&h-> e_ehsize); /* ELF header size in bytes */
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swab16s(&h-> e_phentsize); /* Program header table entry size */
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swab16s(&h-> e_phnum); /* Program header table entry count */
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swab16s(&h-> e_shentsize); /* Section header table entry size */
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swab16s(&h-> e_shnum); /* Section header table entry count */
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swab16s(&h-> e_shstrndx); /* Section header string table index */
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} |
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void elf_swap_shdr(struct elf_shdr *h) |
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{ |
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swab32s(&h-> sh_name); /* Section name (string tbl index) */
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swab32s(&h-> sh_type); /* Section type */
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swabls(&h-> sh_flags); /* Section flags */
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swabls(&h-> sh_addr); /* Section virtual addr at execution */
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swabls(&h-> sh_offset); /* Section file offset */
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swabls(&h-> sh_size); /* Section size in bytes */
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swab32s(&h-> sh_link); /* Link to another section */
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swab32s(&h-> sh_info); /* Additional section information */
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swabls(&h-> sh_addralign); /* Section alignment */
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swabls(&h-> sh_entsize); /* Entry size if section holds table */
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} |
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void elf_swap_phdr(struct elf_phdr *h) |
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{ |
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swab32s(&h->p_type); /* Segment type */
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swabls(&h->p_offset); /* Segment file offset */
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swabls(&h->p_vaddr); /* Segment virtual address */
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swabls(&h->p_paddr); /* Segment physical address */
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swabls(&h->p_filesz); /* Segment size in file */
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swabls(&h->p_memsz); /* Segment size in memory */
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swab32s(&h->p_flags); /* Segment flags */
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swabls(&h->p_align); /* Segment alignment */
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} |
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void elf_swap_rel(ELF_RELOC *rel)
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{ |
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swabls(&rel->r_offset); |
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swabls(&rel->r_info); |
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#ifdef ELF_USES_RELOCA
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swabls(&rel->r_addend); |
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#endif
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} |
403 |
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struct elf_shdr *find_elf_section(struct elf_shdr *shdr, int shnum, const char *shstr, |
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const char *name) |
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{ |
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int i;
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const char *shname; |
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struct elf_shdr *sec;
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for(i = 0; i < shnum; i++) { |
412 |
sec = &shdr[i]; |
413 |
if (!sec->sh_name)
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continue;
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shname = shstr + sec->sh_name; |
416 |
if (!strcmp(shname, name))
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return sec;
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} |
419 |
return NULL; |
420 |
} |
421 |
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int find_reloc(int sh_index) |
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{ |
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struct elf_shdr *sec;
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int i;
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for(i = 0; i < ehdr.e_shnum; i++) { |
428 |
sec = &shdr[i]; |
429 |
if (sec->sh_type == SHT_RELOC && sec->sh_info == sh_index)
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return i;
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} |
432 |
return 0; |
433 |
} |
434 |
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435 |
static host_ulong get_rel_offset(EXE_RELOC *rel)
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{ |
437 |
return rel->r_offset;
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438 |
} |
439 |
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440 |
static char *get_rel_sym_name(EXE_RELOC *rel) |
441 |
{ |
442 |
return strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
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} |
444 |
|
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static char *get_sym_name(EXE_SYM *sym) |
446 |
{ |
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return strtab + sym->st_name;
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} |
449 |
|
450 |
/* load an elf object file */
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451 |
int load_object(const char *filename) |
452 |
{ |
453 |
int fd;
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454 |
struct elf_shdr *sec, *symtab_sec, *strtab_sec, *text_sec;
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int i, j;
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ElfW(Sym) *sym; |
457 |
char *shstr;
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ELF_RELOC *rel; |
459 |
|
460 |
fd = open(filename, O_RDONLY); |
461 |
if (fd < 0) |
462 |
error("can't open file '%s'", filename);
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463 |
|
464 |
/* Read ELF header. */
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465 |
if (read(fd, &ehdr, sizeof (ehdr)) != sizeof (ehdr)) |
466 |
error("unable to read file header");
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467 |
|
468 |
/* Check ELF identification. */
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469 |
if (ehdr.e_ident[EI_MAG0] != ELFMAG0
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470 |
|| ehdr.e_ident[EI_MAG1] != ELFMAG1 |
471 |
|| ehdr.e_ident[EI_MAG2] != ELFMAG2 |
472 |
|| ehdr.e_ident[EI_MAG3] != ELFMAG3 |
473 |
|| ehdr.e_ident[EI_VERSION] != EV_CURRENT) { |
474 |
error("bad ELF header");
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475 |
} |
476 |
|
477 |
do_swap = elf_must_swap(&ehdr); |
478 |
if (do_swap)
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elf_swap_ehdr(&ehdr); |
480 |
if (ehdr.e_ident[EI_CLASS] != ELF_CLASS)
|
481 |
error("Unsupported ELF class");
|
482 |
if (ehdr.e_type != ET_REL)
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483 |
error("ELF object file expected");
|
484 |
if (ehdr.e_version != EV_CURRENT)
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485 |
error("Invalid ELF version");
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486 |
if (!elf_check_arch(ehdr.e_machine))
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error("Unsupported CPU (e_machine=%d)", ehdr.e_machine);
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488 |
|
489 |
/* read section headers */
|
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shdr = load_data(fd, ehdr.e_shoff, ehdr.e_shnum * sizeof(struct elf_shdr)); |
491 |
if (do_swap) {
|
492 |
for(i = 0; i < ehdr.e_shnum; i++) { |
493 |
elf_swap_shdr(&shdr[i]); |
494 |
} |
495 |
} |
496 |
|
497 |
/* read all section data */
|
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sdata = malloc(sizeof(void *) * ehdr.e_shnum); |
499 |
memset(sdata, 0, sizeof(void *) * ehdr.e_shnum); |
500 |
|
501 |
for(i = 0;i < ehdr.e_shnum; i++) { |
502 |
sec = &shdr[i]; |
503 |
if (sec->sh_type != SHT_NOBITS)
|
504 |
sdata[i] = load_data(fd, sec->sh_offset, sec->sh_size); |
505 |
} |
506 |
|
507 |
sec = &shdr[ehdr.e_shstrndx]; |
508 |
shstr = sdata[ehdr.e_shstrndx]; |
509 |
|
510 |
/* swap relocations */
|
511 |
for(i = 0; i < ehdr.e_shnum; i++) { |
512 |
sec = &shdr[i]; |
513 |
if (sec->sh_type == SHT_RELOC) {
|
514 |
nb_relocs = sec->sh_size / sec->sh_entsize; |
515 |
if (do_swap) {
|
516 |
for(j = 0, rel = (ELF_RELOC *)sdata[i]; j < nb_relocs; j++, rel++) |
517 |
elf_swap_rel(rel); |
518 |
} |
519 |
} |
520 |
} |
521 |
/* text section */
|
522 |
|
523 |
text_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".text");
|
524 |
if (!text_sec)
|
525 |
error("could not find .text section");
|
526 |
text_shndx = text_sec - shdr; |
527 |
text = sdata[text_shndx]; |
528 |
|
529 |
/* find text relocations, if any */
|
530 |
relocs = NULL;
|
531 |
nb_relocs = 0;
|
532 |
i = find_reloc(text_shndx); |
533 |
if (i != 0) { |
534 |
relocs = (ELF_RELOC *)sdata[i]; |
535 |
nb_relocs = shdr[i].sh_size / shdr[i].sh_entsize; |
536 |
} |
537 |
|
538 |
symtab_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".symtab");
|
539 |
if (!symtab_sec)
|
540 |
error("could not find .symtab section");
|
541 |
strtab_sec = &shdr[symtab_sec->sh_link]; |
542 |
|
543 |
symtab = (ElfW(Sym) *)sdata[symtab_sec - shdr]; |
544 |
strtab = sdata[symtab_sec->sh_link]; |
545 |
|
546 |
nb_syms = symtab_sec->sh_size / sizeof(ElfW(Sym));
|
547 |
if (do_swap) {
|
548 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
549 |
swab32s(&sym->st_name); |
550 |
swabls(&sym->st_value); |
551 |
swabls(&sym->st_size); |
552 |
swab16s(&sym->st_shndx); |
553 |
} |
554 |
} |
555 |
close(fd); |
556 |
return 0; |
557 |
} |
558 |
|
559 |
#endif /* CONFIG_FORMAT_ELF */ |
560 |
|
561 |
#ifdef CONFIG_FORMAT_COFF
|
562 |
|
563 |
/* COFF file info */
|
564 |
struct external_scnhdr *shdr;
|
565 |
uint8_t **sdata; |
566 |
struct external_filehdr fhdr;
|
567 |
struct external_syment *coff_symtab;
|
568 |
char *strtab;
|
569 |
int coff_text_shndx, coff_data_shndx;
|
570 |
|
571 |
int data_shndx;
|
572 |
|
573 |
#define STRTAB_SIZE 4 |
574 |
|
575 |
#define DIR32 0x06 |
576 |
#define DISP32 0x14 |
577 |
|
578 |
#define T_FUNCTION 0x20 |
579 |
#define C_EXTERNAL 2 |
580 |
|
581 |
void sym_ent_name(struct external_syment *ext_sym, EXE_SYM *sym) |
582 |
{ |
583 |
char *q;
|
584 |
int c, i, len;
|
585 |
|
586 |
if (ext_sym->e.e.e_zeroes != 0) { |
587 |
q = sym->st_name; |
588 |
for(i = 0; i < 8; i++) { |
589 |
c = ext_sym->e.e_name[i]; |
590 |
if (c == '\0') |
591 |
break;
|
592 |
*q++ = c; |
593 |
} |
594 |
*q = '\0';
|
595 |
} else {
|
596 |
pstrcpy(sym->st_name, sizeof(sym->st_name), strtab + ext_sym->e.e.e_offset);
|
597 |
} |
598 |
|
599 |
/* now convert the name to a C name (suppress the leading '_') */
|
600 |
if (sym->st_name[0] == '_') { |
601 |
len = strlen(sym->st_name); |
602 |
memmove(sym->st_name, sym->st_name + 1, len - 1); |
603 |
sym->st_name[len - 1] = '\0'; |
604 |
} |
605 |
} |
606 |
|
607 |
char *name_for_dotdata(struct coff_rel *rel) |
608 |
{ |
609 |
int i;
|
610 |
struct coff_sym *sym;
|
611 |
uint32_t text_data; |
612 |
|
613 |
text_data = *(uint32_t *)(text + rel->r_offset); |
614 |
|
615 |
for (i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
616 |
if (sym->st_syment->e_scnum == data_shndx &&
|
617 |
text_data >= sym->st_value && |
618 |
text_data < sym->st_value + sym->st_size) { |
619 |
|
620 |
return sym->st_name;
|
621 |
|
622 |
} |
623 |
} |
624 |
return NULL; |
625 |
} |
626 |
|
627 |
static char *get_sym_name(EXE_SYM *sym) |
628 |
{ |
629 |
return sym->st_name;
|
630 |
} |
631 |
|
632 |
static char *get_rel_sym_name(EXE_RELOC *rel) |
633 |
{ |
634 |
char *name;
|
635 |
name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx)); |
636 |
if (!strcmp(name, ".data")) |
637 |
name = name_for_dotdata(rel); |
638 |
if (name[0] == '.') |
639 |
return NULL; |
640 |
return name;
|
641 |
} |
642 |
|
643 |
static host_ulong get_rel_offset(EXE_RELOC *rel)
|
644 |
{ |
645 |
return rel->r_offset;
|
646 |
} |
647 |
|
648 |
struct external_scnhdr *find_coff_section(struct external_scnhdr *shdr, int shnum, const char *name) |
649 |
{ |
650 |
int i;
|
651 |
const char *shname; |
652 |
struct external_scnhdr *sec;
|
653 |
|
654 |
for(i = 0; i < shnum; i++) { |
655 |
sec = &shdr[i]; |
656 |
if (!sec->s_name)
|
657 |
continue;
|
658 |
shname = sec->s_name; |
659 |
if (!strcmp(shname, name))
|
660 |
return sec;
|
661 |
} |
662 |
return NULL; |
663 |
} |
664 |
|
665 |
/* load a coff object file */
|
666 |
int load_object(const char *filename) |
667 |
{ |
668 |
int fd;
|
669 |
struct external_scnhdr *sec, *text_sec, *data_sec;
|
670 |
int i;
|
671 |
struct external_syment *ext_sym;
|
672 |
struct external_reloc *coff_relocs;
|
673 |
struct external_reloc *ext_rel;
|
674 |
uint32_t *n_strtab; |
675 |
EXE_SYM *sym; |
676 |
EXE_RELOC *rel; |
677 |
|
678 |
fd = open(filename, O_RDONLY |
679 |
#ifdef _WIN32
|
680 |
| O_BINARY |
681 |
#endif
|
682 |
); |
683 |
if (fd < 0) |
684 |
error("can't open file '%s'", filename);
|
685 |
|
686 |
/* Read COFF header. */
|
687 |
if (read(fd, &fhdr, sizeof (fhdr)) != sizeof (fhdr)) |
688 |
error("unable to read file header");
|
689 |
|
690 |
/* Check COFF identification. */
|
691 |
if (fhdr.f_magic != I386MAGIC) {
|
692 |
error("bad COFF header");
|
693 |
} |
694 |
do_swap = 0;
|
695 |
|
696 |
/* read section headers */
|
697 |
shdr = load_data(fd, sizeof(struct external_filehdr) + fhdr.f_opthdr, fhdr.f_nscns * sizeof(struct external_scnhdr)); |
698 |
|
699 |
/* read all section data */
|
700 |
sdata = malloc(sizeof(void *) * fhdr.f_nscns); |
701 |
memset(sdata, 0, sizeof(void *) * fhdr.f_nscns); |
702 |
|
703 |
const char *p; |
704 |
for(i = 0;i < fhdr.f_nscns; i++) { |
705 |
sec = &shdr[i]; |
706 |
if (!strstart(sec->s_name, ".bss", &p)) |
707 |
sdata[i] = load_data(fd, sec->s_scnptr, sec->s_size); |
708 |
} |
709 |
|
710 |
|
711 |
/* text section */
|
712 |
text_sec = find_coff_section(shdr, fhdr.f_nscns, ".text");
|
713 |
if (!text_sec)
|
714 |
error("could not find .text section");
|
715 |
coff_text_shndx = text_sec - shdr; |
716 |
text = sdata[coff_text_shndx]; |
717 |
|
718 |
/* data section */
|
719 |
data_sec = find_coff_section(shdr, fhdr.f_nscns, ".data");
|
720 |
if (!data_sec)
|
721 |
error("could not find .data section");
|
722 |
coff_data_shndx = data_sec - shdr; |
723 |
|
724 |
coff_symtab = load_data(fd, fhdr.f_symptr, fhdr.f_nsyms*SYMESZ); |
725 |
for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) { |
726 |
for(i=0;i<8;i++) |
727 |
printf(" %02x", ((uint8_t *)ext_sym->e.e_name)[i]);
|
728 |
printf("\n");
|
729 |
} |
730 |
|
731 |
|
732 |
n_strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), STRTAB_SIZE); |
733 |
strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), *n_strtab); |
734 |
|
735 |
nb_syms = fhdr.f_nsyms; |
736 |
|
737 |
for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) { |
738 |
if (strstart(ext_sym->e.e_name, ".text", NULL)) |
739 |
text_shndx = ext_sym->e_scnum; |
740 |
if (strstart(ext_sym->e.e_name, ".data", NULL)) |
741 |
data_shndx = ext_sym->e_scnum; |
742 |
} |
743 |
|
744 |
/* set coff symbol */
|
745 |
symtab = malloc(sizeof(struct coff_sym) * nb_syms); |
746 |
|
747 |
int aux_size, j;
|
748 |
for (i = 0, ext_sym = coff_symtab, sym = symtab; i < nb_syms; i++, ext_sym++, sym++) { |
749 |
memset(sym, 0, sizeof(*sym)); |
750 |
sym->st_syment = ext_sym; |
751 |
sym_ent_name(ext_sym, sym); |
752 |
sym->st_value = ext_sym->e_value; |
753 |
|
754 |
aux_size = *(int8_t *)ext_sym->e_numaux; |
755 |
if (ext_sym->e_scnum == text_shndx && ext_sym->e_type == T_FUNCTION) {
|
756 |
for (j = aux_size + 1; j < nb_syms - i; j++) { |
757 |
if ((ext_sym + j)->e_scnum == text_shndx &&
|
758 |
(ext_sym + j)->e_type == T_FUNCTION ){ |
759 |
sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value; |
760 |
break;
|
761 |
} else if (j == nb_syms - i - 1) { |
762 |
sec = &shdr[coff_text_shndx]; |
763 |
sym->st_size = sec->s_size - ext_sym->e_value; |
764 |
break;
|
765 |
} |
766 |
} |
767 |
} else if (ext_sym->e_scnum == data_shndx && *(uint8_t *)ext_sym->e_sclass == C_EXTERNAL) { |
768 |
for (j = aux_size + 1; j < nb_syms - i; j++) { |
769 |
if ((ext_sym + j)->e_scnum == data_shndx) {
|
770 |
sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value; |
771 |
break;
|
772 |
} else if (j == nb_syms - i - 1) { |
773 |
sec = &shdr[coff_data_shndx]; |
774 |
sym->st_size = sec->s_size - ext_sym->e_value; |
775 |
break;
|
776 |
} |
777 |
} |
778 |
} else {
|
779 |
sym->st_size = 0;
|
780 |
} |
781 |
|
782 |
sym->st_type = ext_sym->e_type; |
783 |
sym->st_shndx = ext_sym->e_scnum; |
784 |
} |
785 |
|
786 |
|
787 |
/* find text relocations, if any */
|
788 |
sec = &shdr[coff_text_shndx]; |
789 |
coff_relocs = load_data(fd, sec->s_relptr, sec->s_nreloc*RELSZ); |
790 |
nb_relocs = sec->s_nreloc; |
791 |
|
792 |
/* set coff relocation */
|
793 |
relocs = malloc(sizeof(struct coff_rel) * nb_relocs); |
794 |
for (i = 0, ext_rel = coff_relocs, rel = relocs; i < nb_relocs; |
795 |
i++, ext_rel++, rel++) { |
796 |
memset(rel, 0, sizeof(*rel)); |
797 |
rel->r_reloc = ext_rel; |
798 |
rel->r_offset = *(uint32_t *)ext_rel->r_vaddr; |
799 |
rel->r_type = *(uint16_t *)ext_rel->r_type; |
800 |
} |
801 |
return 0; |
802 |
} |
803 |
|
804 |
#endif /* CONFIG_FORMAT_COFF */ |
805 |
|
806 |
#ifdef CONFIG_FORMAT_MACH
|
807 |
|
808 |
/* File Header */
|
809 |
struct mach_header mach_hdr;
|
810 |
|
811 |
/* commands */
|
812 |
struct segment_command *segment = 0; |
813 |
struct dysymtab_command *dysymtabcmd = 0; |
814 |
struct symtab_command *symtabcmd = 0; |
815 |
|
816 |
/* section */
|
817 |
struct section *section_hdr;
|
818 |
struct section *text_sec_hdr;
|
819 |
uint8_t **sdata; |
820 |
|
821 |
/* relocs */
|
822 |
struct relocation_info *relocs;
|
823 |
|
824 |
/* symbols */
|
825 |
EXE_SYM *symtab; |
826 |
struct nlist *symtab_std;
|
827 |
char *strtab;
|
828 |
|
829 |
/* indirect symbols */
|
830 |
uint32_t *tocdylib; |
831 |
|
832 |
/* Utility functions */
|
833 |
|
834 |
static inline char *find_str_by_index(int index) |
835 |
{ |
836 |
return strtab+index;
|
837 |
} |
838 |
|
839 |
/* Used by dyngen common code */
|
840 |
static char *get_sym_name(EXE_SYM *sym) |
841 |
{ |
842 |
char *name = find_str_by_index(sym->n_un.n_strx);
|
843 |
|
844 |
if ( sym->n_type & N_STAB ) /* Debug symbols are ignored */ |
845 |
return "debug"; |
846 |
|
847 |
if(!name)
|
848 |
return name;
|
849 |
if(name[0]=='_') |
850 |
return name + 1; |
851 |
else
|
852 |
return name;
|
853 |
} |
854 |
|
855 |
/* find a section index given its segname, sectname */
|
856 |
static int find_mach_sec_index(struct section *section_hdr, int shnum, const char *segname, |
857 |
const char *sectname) |
858 |
{ |
859 |
int i;
|
860 |
struct section *sec = section_hdr;
|
861 |
|
862 |
for(i = 0; i < shnum; i++, sec++) { |
863 |
if (!sec->segname || !sec->sectname)
|
864 |
continue;
|
865 |
if (!strcmp(sec->sectname, sectname) && !strcmp(sec->segname, segname))
|
866 |
return i;
|
867 |
} |
868 |
return -1; |
869 |
} |
870 |
|
871 |
/* find a section header given its segname, sectname */
|
872 |
struct section *find_mach_sec_hdr(struct section *section_hdr, int shnum, const char *segname, |
873 |
const char *sectname) |
874 |
{ |
875 |
int index = find_mach_sec_index(section_hdr, shnum, segname, sectname);
|
876 |
if(index == -1) |
877 |
return NULL; |
878 |
return section_hdr+index;
|
879 |
} |
880 |
|
881 |
|
882 |
static inline void fetch_next_pair_value(struct relocation_info * rel, unsigned int *value) |
883 |
{ |
884 |
struct scattered_relocation_info * scarel;
|
885 |
|
886 |
if(R_SCATTERED & rel->r_address) {
|
887 |
scarel = (struct scattered_relocation_info*)rel;
|
888 |
if(scarel->r_type != PPC_RELOC_PAIR)
|
889 |
error("fetch_next_pair_value: looking for a pair which was not found (1)");
|
890 |
*value = scarel->r_value; |
891 |
} else {
|
892 |
if(rel->r_type != PPC_RELOC_PAIR)
|
893 |
error("fetch_next_pair_value: looking for a pair which was not found (2)");
|
894 |
*value = rel->r_address; |
895 |
} |
896 |
} |
897 |
|
898 |
/* find a sym name given its value, in a section number */
|
899 |
static const char * find_sym_with_value_and_sec_number( int value, int sectnum, int * offset ) |
900 |
{ |
901 |
int i, ret = -1; |
902 |
|
903 |
for( i = 0 ; i < nb_syms; i++ ) |
904 |
{ |
905 |
if( !(symtab[i].n_type & N_STAB) && (symtab[i].n_type & N_SECT) &&
|
906 |
(symtab[i].n_sect == sectnum) && (symtab[i].st_value <= value) ) |
907 |
{ |
908 |
if( (ret<0) || (symtab[i].st_value >= symtab[ret].st_value) ) |
909 |
ret = i; |
910 |
} |
911 |
} |
912 |
if( ret < 0 ) { |
913 |
*offset = 0;
|
914 |
return 0; |
915 |
} else {
|
916 |
*offset = value - symtab[ret].st_value; |
917 |
return get_sym_name(&symtab[ret]);
|
918 |
} |
919 |
} |
920 |
|
921 |
/*
|
922 |
* Find symbol name given a (virtual) address, and a section which is of type
|
923 |
* S_NON_LAZY_SYMBOL_POINTERS or S_LAZY_SYMBOL_POINTERS or S_SYMBOL_STUBS
|
924 |
*/
|
925 |
static const char * find_reloc_name_in_sec_ptr(int address, struct section * sec_hdr) |
926 |
{ |
927 |
unsigned int tocindex, symindex, size; |
928 |
const char *name = 0; |
929 |
|
930 |
/* Sanity check */
|
931 |
if(!( address >= sec_hdr->addr && address < (sec_hdr->addr + sec_hdr->size) ) )
|
932 |
return (char*)0; |
933 |
|
934 |
if( sec_hdr->flags & S_SYMBOL_STUBS ){
|
935 |
size = sec_hdr->reserved2; |
936 |
if(size == 0) |
937 |
error("size = 0");
|
938 |
|
939 |
} |
940 |
else if( sec_hdr->flags & S_LAZY_SYMBOL_POINTERS || |
941 |
sec_hdr->flags & S_NON_LAZY_SYMBOL_POINTERS) |
942 |
size = sizeof(unsigned long); |
943 |
else
|
944 |
return 0; |
945 |
|
946 |
/* Compute our index in toc */
|
947 |
tocindex = (address - sec_hdr->addr)/size; |
948 |
symindex = tocdylib[sec_hdr->reserved1 + tocindex]; |
949 |
|
950 |
name = get_sym_name(&symtab[symindex]); |
951 |
|
952 |
return name;
|
953 |
} |
954 |
|
955 |
static const char * find_reloc_name_given_its_address(int address) |
956 |
{ |
957 |
unsigned int i; |
958 |
for(i = 0; i < segment->nsects ; i++) |
959 |
{ |
960 |
const char * name = find_reloc_name_in_sec_ptr(address, §ion_hdr[i]); |
961 |
if((long)name != -1) |
962 |
return name;
|
963 |
} |
964 |
return 0; |
965 |
} |
966 |
|
967 |
static const char * get_reloc_name(EXE_RELOC * rel, int * sslide) |
968 |
{ |
969 |
char * name = 0; |
970 |
struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel; |
971 |
int sectnum = rel->r_symbolnum;
|
972 |
int sectoffset;
|
973 |
int other_half=0; |
974 |
|
975 |
/* init the slide value */
|
976 |
*sslide = 0;
|
977 |
|
978 |
if(R_SCATTERED & rel->r_address)
|
979 |
return (char *)find_reloc_name_given_its_address(sca_rel->r_value); |
980 |
|
981 |
if(rel->r_extern)
|
982 |
{ |
983 |
/* ignore debug sym */
|
984 |
if ( symtab[rel->r_symbolnum].n_type & N_STAB )
|
985 |
return 0; |
986 |
return get_sym_name(&symtab[rel->r_symbolnum]);
|
987 |
} |
988 |
|
989 |
/* Intruction contains an offset to the symbols pointed to, in the rel->r_symbolnum section */
|
990 |
sectoffset = *(uint32_t *)(text + rel->r_address) & 0xffff;
|
991 |
|
992 |
if(sectnum==0xffffff) |
993 |
return 0; |
994 |
|
995 |
/* Sanity Check */
|
996 |
if(sectnum > segment->nsects)
|
997 |
error("sectnum > segment->nsects");
|
998 |
|
999 |
switch(rel->r_type)
|
1000 |
{ |
1001 |
case PPC_RELOC_LO16: fetch_next_pair_value(rel+1, &other_half); sectoffset |= (other_half << 16); |
1002 |
break;
|
1003 |
case PPC_RELOC_HI16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) | (uint16_t)(other_half & 0xffff); |
1004 |
break;
|
1005 |
case PPC_RELOC_HA16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) + (int16_t)(other_half & 0xffff); |
1006 |
break;
|
1007 |
case PPC_RELOC_BR24:
|
1008 |
sectoffset = ( *(uint32_t *)(text + rel->r_address) & 0x03fffffc );
|
1009 |
if (sectoffset & 0x02000000) sectoffset |= 0xfc000000; |
1010 |
break;
|
1011 |
default:
|
1012 |
error("switch(rel->type) not found");
|
1013 |
} |
1014 |
|
1015 |
if(rel->r_pcrel)
|
1016 |
sectoffset += rel->r_address; |
1017 |
|
1018 |
if (rel->r_type == PPC_RELOC_BR24)
|
1019 |
name = (char *)find_reloc_name_in_sec_ptr((int)sectoffset, §ion_hdr[sectnum-1]); |
1020 |
|
1021 |
/* search it in the full symbol list, if not found */
|
1022 |
if(!name)
|
1023 |
name = (char *)find_sym_with_value_and_sec_number(sectoffset, sectnum, sslide);
|
1024 |
|
1025 |
return name;
|
1026 |
} |
1027 |
|
1028 |
/* Used by dyngen common code */
|
1029 |
static const char * get_rel_sym_name(EXE_RELOC * rel) |
1030 |
{ |
1031 |
int sslide;
|
1032 |
return get_reloc_name( rel, &sslide);
|
1033 |
} |
1034 |
|
1035 |
/* Used by dyngen common code */
|
1036 |
static host_ulong get_rel_offset(EXE_RELOC *rel)
|
1037 |
{ |
1038 |
struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel; |
1039 |
if(R_SCATTERED & rel->r_address)
|
1040 |
return sca_rel->r_address;
|
1041 |
else
|
1042 |
return rel->r_address;
|
1043 |
} |
1044 |
|
1045 |
/* load a mach-o object file */
|
1046 |
int load_object(const char *filename) |
1047 |
{ |
1048 |
int fd;
|
1049 |
unsigned int offset_to_segment = 0; |
1050 |
unsigned int offset_to_dysymtab = 0; |
1051 |
unsigned int offset_to_symtab = 0; |
1052 |
struct load_command lc;
|
1053 |
unsigned int i, j; |
1054 |
EXE_SYM *sym; |
1055 |
struct nlist *syment;
|
1056 |
|
1057 |
fd = open(filename, O_RDONLY); |
1058 |
if (fd < 0) |
1059 |
error("can't open file '%s'", filename);
|
1060 |
|
1061 |
/* Read Mach header. */
|
1062 |
if (read(fd, &mach_hdr, sizeof (mach_hdr)) != sizeof (mach_hdr)) |
1063 |
error("unable to read file header");
|
1064 |
|
1065 |
/* Check Mach identification. */
|
1066 |
if (!check_mach_header(mach_hdr)) {
|
1067 |
error("bad Mach header");
|
1068 |
} |
1069 |
|
1070 |
if (mach_hdr.cputype != CPU_TYPE_POWERPC)
|
1071 |
error("Unsupported CPU");
|
1072 |
|
1073 |
if (mach_hdr.filetype != MH_OBJECT)
|
1074 |
error("Unsupported Mach Object");
|
1075 |
|
1076 |
/* read segment headers */
|
1077 |
for(i=0, j=sizeof(mach_hdr); i<mach_hdr.ncmds ; i++) |
1078 |
{ |
1079 |
if(read(fd, &lc, sizeof(struct load_command)) != sizeof(struct load_command)) |
1080 |
error("unable to read load_command");
|
1081 |
if(lc.cmd == LC_SEGMENT)
|
1082 |
{ |
1083 |
offset_to_segment = j; |
1084 |
lseek(fd, offset_to_segment, SEEK_SET); |
1085 |
segment = malloc(sizeof(struct segment_command)); |
1086 |
if(read(fd, segment, sizeof(struct segment_command)) != sizeof(struct segment_command)) |
1087 |
error("unable to read LC_SEGMENT");
|
1088 |
} |
1089 |
if(lc.cmd == LC_DYSYMTAB)
|
1090 |
{ |
1091 |
offset_to_dysymtab = j; |
1092 |
lseek(fd, offset_to_dysymtab, SEEK_SET); |
1093 |
dysymtabcmd = malloc(sizeof(struct dysymtab_command)); |
1094 |
if(read(fd, dysymtabcmd, sizeof(struct dysymtab_command)) != sizeof(struct dysymtab_command)) |
1095 |
error("unable to read LC_DYSYMTAB");
|
1096 |
} |
1097 |
if(lc.cmd == LC_SYMTAB)
|
1098 |
{ |
1099 |
offset_to_symtab = j; |
1100 |
lseek(fd, offset_to_symtab, SEEK_SET); |
1101 |
symtabcmd = malloc(sizeof(struct symtab_command)); |
1102 |
if(read(fd, symtabcmd, sizeof(struct symtab_command)) != sizeof(struct symtab_command)) |
1103 |
error("unable to read LC_SYMTAB");
|
1104 |
} |
1105 |
j+=lc.cmdsize; |
1106 |
|
1107 |
lseek(fd, j, SEEK_SET); |
1108 |
} |
1109 |
|
1110 |
if(!segment)
|
1111 |
error("unable to find LC_SEGMENT");
|
1112 |
|
1113 |
/* read section headers */
|
1114 |
section_hdr = load_data(fd, offset_to_segment + sizeof(struct segment_command), segment->nsects * sizeof(struct section)); |
1115 |
|
1116 |
/* read all section data */
|
1117 |
sdata = (uint8_t **)malloc(sizeof(void *) * segment->nsects); |
1118 |
memset(sdata, 0, sizeof(void *) * segment->nsects); |
1119 |
|
1120 |
/* Load the data in section data */
|
1121 |
for(i = 0; i < segment->nsects; i++) { |
1122 |
sdata[i] = load_data(fd, section_hdr[i].offset, section_hdr[i].size); |
1123 |
} |
1124 |
|
1125 |
/* text section */
|
1126 |
text_sec_hdr = find_mach_sec_hdr(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT); |
1127 |
i = find_mach_sec_index(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT); |
1128 |
if (i == -1 || !text_sec_hdr) |
1129 |
error("could not find __TEXT,__text section");
|
1130 |
text = sdata[i]; |
1131 |
|
1132 |
/* Make sure dysym was loaded */
|
1133 |
if(!(int)dysymtabcmd) |
1134 |
error("could not find __DYSYMTAB segment");
|
1135 |
|
1136 |
/* read the table of content of the indirect sym */
|
1137 |
tocdylib = load_data( fd, dysymtabcmd->indirectsymoff, dysymtabcmd->nindirectsyms * sizeof(uint32_t) );
|
1138 |
|
1139 |
/* Make sure symtab was loaded */
|
1140 |
if(!(int)symtabcmd) |
1141 |
error("could not find __SYMTAB segment");
|
1142 |
nb_syms = symtabcmd->nsyms; |
1143 |
|
1144 |
symtab_std = load_data(fd, symtabcmd->symoff, symtabcmd->nsyms * sizeof(struct nlist)); |
1145 |
strtab = load_data(fd, symtabcmd->stroff, symtabcmd->strsize); |
1146 |
|
1147 |
symtab = malloc(sizeof(EXE_SYM) * nb_syms);
|
1148 |
|
1149 |
/* Now transform the symtab, to an extended version, with the sym size, and the C name */
|
1150 |
for(i = 0, sym = symtab, syment = symtab_std; i < nb_syms; i++, sym++, syment++) { |
1151 |
struct nlist *sym_follow, *sym_next = 0; |
1152 |
unsigned int j; |
1153 |
memset(sym, 0, sizeof(*sym)); |
1154 |
|
1155 |
if ( syment->n_type & N_STAB ) /* Debug symbols are skipped */ |
1156 |
continue;
|
1157 |
|
1158 |
memcpy(sym, syment, sizeof(*syment));
|
1159 |
|
1160 |
/* Find the following symbol in order to get the current symbol size */
|
1161 |
for(j = 0, sym_follow = symtab_std; j < nb_syms; j++, sym_follow++) { |
1162 |
if ( sym_follow->n_sect != 1 || sym_follow->n_type & N_STAB || !(sym_follow->n_value > sym->st_value)) |
1163 |
continue;
|
1164 |
if(!sym_next) {
|
1165 |
sym_next = sym_follow; |
1166 |
continue;
|
1167 |
} |
1168 |
if(!(sym_next->n_value > sym_follow->n_value))
|
1169 |
continue;
|
1170 |
sym_next = sym_follow; |
1171 |
} |
1172 |
if(sym_next)
|
1173 |
sym->st_size = sym_next->n_value - sym->st_value; |
1174 |
else
|
1175 |
sym->st_size = text_sec_hdr->size - sym->st_value; |
1176 |
} |
1177 |
|
1178 |
/* Find Reloc */
|
1179 |
relocs = load_data(fd, text_sec_hdr->reloff, text_sec_hdr->nreloc * sizeof(struct relocation_info)); |
1180 |
nb_relocs = text_sec_hdr->nreloc; |
1181 |
|
1182 |
close(fd); |
1183 |
return 0; |
1184 |
} |
1185 |
|
1186 |
#endif /* CONFIG_FORMAT_MACH */ |
1187 |
|
1188 |
void get_reloc_expr(char *name, int name_size, const char *sym_name) |
1189 |
{ |
1190 |
const char *p; |
1191 |
|
1192 |
if (strstart(sym_name, "__op_param", &p)) { |
1193 |
snprintf(name, name_size, "param%s", p);
|
1194 |
} else if (strstart(sym_name, "__op_gen_label", &p)) { |
1195 |
snprintf(name, name_size, "gen_labels[param%s]", p);
|
1196 |
} else {
|
1197 |
#ifdef HOST_SPARC
|
1198 |
if (sym_name[0] == '.') |
1199 |
snprintf(name, name_size, |
1200 |
"(long)(&__dot_%s)",
|
1201 |
sym_name + 1);
|
1202 |
else
|
1203 |
#endif
|
1204 |
snprintf(name, name_size, "(long)(&%s)", sym_name);
|
1205 |
} |
1206 |
} |
1207 |
|
1208 |
#ifdef HOST_IA64
|
1209 |
|
1210 |
#define PLT_ENTRY_SIZE 16 /* 1 bundle containing "brl" */ |
1211 |
|
1212 |
struct plt_entry {
|
1213 |
struct plt_entry *next;
|
1214 |
const char *name; |
1215 |
unsigned long addend; |
1216 |
} *plt_list; |
1217 |
|
1218 |
static int |
1219 |
get_plt_index (const char *name, unsigned long addend) |
1220 |
{ |
1221 |
struct plt_entry *plt, *prev= NULL; |
1222 |
int index = 0; |
1223 |
|
1224 |
/* see if we already have an entry for this target: */
|
1225 |
for (plt = plt_list; plt; ++index, prev = plt, plt = plt->next)
|
1226 |
if (strcmp(plt->name, name) == 0 && plt->addend == addend) |
1227 |
return index;
|
1228 |
|
1229 |
/* nope; create a new PLT entry: */
|
1230 |
|
1231 |
plt = malloc(sizeof(*plt));
|
1232 |
if (!plt) {
|
1233 |
perror("malloc");
|
1234 |
exit(1);
|
1235 |
} |
1236 |
memset(plt, 0, sizeof(*plt)); |
1237 |
plt->name = strdup(name); |
1238 |
plt->addend = addend; |
1239 |
|
1240 |
/* append to plt-list: */
|
1241 |
if (prev)
|
1242 |
prev->next = plt; |
1243 |
else
|
1244 |
plt_list = plt; |
1245 |
return index;
|
1246 |
} |
1247 |
|
1248 |
#endif
|
1249 |
|
1250 |
#ifdef HOST_ARM
|
1251 |
|
1252 |
int arm_emit_ldr_info(const char *name, unsigned long start_offset, |
1253 |
FILE *outfile, uint8_t *p_start, uint8_t *p_end, |
1254 |
ELF_RELOC *relocs, int nb_relocs)
|
1255 |
{ |
1256 |
uint8_t *p; |
1257 |
uint32_t insn; |
1258 |
int offset, min_offset, pc_offset, data_size;
|
1259 |
uint8_t data_allocated[1024];
|
1260 |
unsigned int data_index; |
1261 |
|
1262 |
memset(data_allocated, 0, sizeof(data_allocated)); |
1263 |
|
1264 |
p = p_start; |
1265 |
min_offset = p_end - p_start; |
1266 |
while (p < p_start + min_offset) {
|
1267 |
insn = get32((uint32_t *)p); |
1268 |
if ((insn & 0x0d5f0000) == 0x051f0000) { |
1269 |
/* ldr reg, [pc, #im] */
|
1270 |
offset = insn & 0xfff;
|
1271 |
if (!(insn & 0x00800000)) |
1272 |
offset = -offset; |
1273 |
if ((offset & 3) !=0) |
1274 |
error("%s:%04x: ldr pc offset must be 32 bit aligned",
|
1275 |
name, start_offset + p - p_start); |
1276 |
pc_offset = p - p_start + offset + 8;
|
1277 |
if (pc_offset <= (p - p_start) ||
|
1278 |
pc_offset >= (p_end - p_start)) |
1279 |
error("%s:%04x: ldr pc offset must point inside the function code",
|
1280 |
name, start_offset + p - p_start); |
1281 |
if (pc_offset < min_offset)
|
1282 |
min_offset = pc_offset; |
1283 |
if (outfile) {
|
1284 |
/* ldr position */
|
1285 |
fprintf(outfile, " arm_ldr_ptr->ptr = gen_code_ptr + %d;\n",
|
1286 |
p - p_start); |
1287 |
/* ldr data index */
|
1288 |
data_index = ((p_end - p_start) - pc_offset - 4) >> 2; |
1289 |
fprintf(outfile, " arm_ldr_ptr->data_ptr = arm_data_ptr + %d;\n",
|
1290 |
data_index); |
1291 |
fprintf(outfile, " arm_ldr_ptr++;\n");
|
1292 |
if (data_index >= sizeof(data_allocated)) |
1293 |
error("%s: too many data", name);
|
1294 |
if (!data_allocated[data_index]) {
|
1295 |
ELF_RELOC *rel; |
1296 |
int i, addend, type;
|
1297 |
const char *sym_name, *p; |
1298 |
char relname[1024]; |
1299 |
|
1300 |
data_allocated[data_index] = 1;
|
1301 |
|
1302 |
/* data value */
|
1303 |
addend = get32((uint32_t *)(p_start + pc_offset)); |
1304 |
relname[0] = '\0'; |
1305 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1306 |
if (rel->r_offset == (pc_offset + start_offset)) {
|
1307 |
sym_name = get_rel_sym_name(rel); |
1308 |
/* the compiler leave some unnecessary references to the code */
|
1309 |
get_reloc_expr(relname, sizeof(relname), sym_name);
|
1310 |
type = ELF32_R_TYPE(rel->r_info); |
1311 |
if (type != R_ARM_ABS32)
|
1312 |
error("%s: unsupported data relocation", name);
|
1313 |
break;
|
1314 |
} |
1315 |
} |
1316 |
fprintf(outfile, " arm_data_ptr[%d] = 0x%x",
|
1317 |
data_index, addend); |
1318 |
if (relname[0] != '\0') |
1319 |
fprintf(outfile, " + %s", relname);
|
1320 |
fprintf(outfile, ";\n");
|
1321 |
} |
1322 |
} |
1323 |
} |
1324 |
p += 4;
|
1325 |
} |
1326 |
data_size = (p_end - p_start) - min_offset; |
1327 |
if (data_size > 0 && outfile) { |
1328 |
fprintf(outfile, " arm_data_ptr += %d;\n", data_size >> 2); |
1329 |
} |
1330 |
|
1331 |
/* the last instruction must be a mov pc, lr */
|
1332 |
if (p == p_start)
|
1333 |
goto arm_ret_error;
|
1334 |
p -= 4;
|
1335 |
insn = get32((uint32_t *)p); |
1336 |
if ((insn & 0xffff0000) != 0xe91b0000) { |
1337 |
arm_ret_error:
|
1338 |
if (!outfile)
|
1339 |
printf("%s: invalid epilog\n", name);
|
1340 |
} |
1341 |
return p - p_start;
|
1342 |
} |
1343 |
#endif
|
1344 |
|
1345 |
|
1346 |
#define MAX_ARGS 3 |
1347 |
|
1348 |
/* generate op code */
|
1349 |
void gen_code(const char *name, host_ulong offset, host_ulong size, |
1350 |
FILE *outfile, int gen_switch)
|
1351 |
{ |
1352 |
int copy_size = 0; |
1353 |
uint8_t *p_start, *p_end; |
1354 |
host_ulong start_offset; |
1355 |
int nb_args, i, n;
|
1356 |
uint8_t args_present[MAX_ARGS]; |
1357 |
const char *sym_name, *p; |
1358 |
EXE_RELOC *rel; |
1359 |
|
1360 |
/* Compute exact size excluding prologue and epilogue instructions.
|
1361 |
* Increment start_offset to skip epilogue instructions, then compute
|
1362 |
* copy_size the indicate the size of the remaining instructions (in
|
1363 |
* bytes).
|
1364 |
*/
|
1365 |
p_start = text + offset; |
1366 |
p_end = p_start + size; |
1367 |
start_offset = offset; |
1368 |
#if defined(HOST_I386) || defined(HOST_X86_64)
|
1369 |
#ifdef CONFIG_FORMAT_COFF
|
1370 |
{ |
1371 |
uint8_t *p; |
1372 |
p = p_end - 1;
|
1373 |
if (p == p_start)
|
1374 |
error("empty code for %s", name);
|
1375 |
while (*p != 0xc3) { |
1376 |
p--; |
1377 |
if (p <= p_start)
|
1378 |
error("ret or jmp expected at the end of %s", name);
|
1379 |
} |
1380 |
copy_size = p - p_start; |
1381 |
} |
1382 |
#else
|
1383 |
{ |
1384 |
int len;
|
1385 |
len = p_end - p_start; |
1386 |
if (len == 0) |
1387 |
error("empty code for %s", name);
|
1388 |
if (p_end[-1] == 0xc3) { |
1389 |
len--; |
1390 |
} else {
|
1391 |
error("ret or jmp expected at the end of %s", name);
|
1392 |
} |
1393 |
copy_size = len; |
1394 |
} |
1395 |
#endif
|
1396 |
#elif defined(HOST_PPC)
|
1397 |
{ |
1398 |
uint8_t *p; |
1399 |
p = (void *)(p_end - 4); |
1400 |
if (p == p_start)
|
1401 |
error("empty code for %s", name);
|
1402 |
if (get32((uint32_t *)p) != 0x4e800020) |
1403 |
error("blr expected at the end of %s", name);
|
1404 |
copy_size = p - p_start; |
1405 |
} |
1406 |
#elif defined(HOST_S390)
|
1407 |
{ |
1408 |
uint8_t *p; |
1409 |
p = (void *)(p_end - 2); |
1410 |
if (p == p_start)
|
1411 |
error("empty code for %s", name);
|
1412 |
if (get16((uint16_t *)p) != 0x07fe && get16((uint16_t *)p) != 0x07f4) |
1413 |
error("br %%r14 expected at the end of %s", name);
|
1414 |
copy_size = p - p_start; |
1415 |
} |
1416 |
#elif defined(HOST_ALPHA)
|
1417 |
{ |
1418 |
uint8_t *p; |
1419 |
p = p_end - 4;
|
1420 |
#if 0
|
1421 |
/* XXX: check why it occurs */
|
1422 |
if (p == p_start)
|
1423 |
error("empty code for %s", name);
|
1424 |
#endif
|
1425 |
if (get32((uint32_t *)p) != 0x6bfa8001) |
1426 |
error("ret expected at the end of %s", name);
|
1427 |
copy_size = p - p_start; |
1428 |
} |
1429 |
#elif defined(HOST_IA64)
|
1430 |
{ |
1431 |
uint8_t *p; |
1432 |
p = (void *)(p_end - 4); |
1433 |
if (p == p_start)
|
1434 |
error("empty code for %s", name);
|
1435 |
/* br.ret.sptk.many b0;; */
|
1436 |
/* 08 00 84 00 */
|
1437 |
if (get32((uint32_t *)p) != 0x00840008) |
1438 |
error("br.ret.sptk.many b0;; expected at the end of %s", name);
|
1439 |
copy_size = p_end - p_start; |
1440 |
} |
1441 |
#elif defined(HOST_SPARC)
|
1442 |
{ |
1443 |
uint32_t start_insn, end_insn1, end_insn2; |
1444 |
uint8_t *p; |
1445 |
p = (void *)(p_end - 8); |
1446 |
if (p <= p_start)
|
1447 |
error("empty code for %s", name);
|
1448 |
start_insn = get32((uint32_t *)(p_start + 0x0));
|
1449 |
end_insn1 = get32((uint32_t *)(p + 0x0));
|
1450 |
end_insn2 = get32((uint32_t *)(p + 0x4));
|
1451 |
if ((start_insn & ~0x1fff) == 0x9de3a000) { |
1452 |
p_start += 0x4;
|
1453 |
start_offset += 0x4;
|
1454 |
if ((int)(start_insn | ~0x1fff) < -128) |
1455 |
error("Found bogus save at the start of %s", name);
|
1456 |
if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000) |
1457 |
error("ret; restore; not found at end of %s", name);
|
1458 |
} else {
|
1459 |
error("No save at the beginning of %s", name);
|
1460 |
} |
1461 |
#if 0
|
1462 |
/* Skip a preceeding nop, if present. */
|
1463 |
if (p > p_start) {
|
1464 |
skip_insn = get32((uint32_t *)(p - 0x4));
|
1465 |
if (skip_insn == 0x01000000)
|
1466 |
p -= 4;
|
1467 |
}
|
1468 |
#endif
|
1469 |
copy_size = p - p_start; |
1470 |
} |
1471 |
#elif defined(HOST_SPARC64)
|
1472 |
{ |
1473 |
uint32_t start_insn, end_insn1, end_insn2, skip_insn; |
1474 |
uint8_t *p; |
1475 |
p = (void *)(p_end - 8); |
1476 |
if (p <= p_start)
|
1477 |
error("empty code for %s", name);
|
1478 |
start_insn = get32((uint32_t *)(p_start + 0x0));
|
1479 |
end_insn1 = get32((uint32_t *)(p + 0x0));
|
1480 |
end_insn2 = get32((uint32_t *)(p + 0x4));
|
1481 |
if ((start_insn & ~0x1fff) == 0x9de3a000) { |
1482 |
p_start += 0x4;
|
1483 |
start_offset += 0x4;
|
1484 |
if ((int)(start_insn | ~0x1fff) < -256) |
1485 |
error("Found bogus save at the start of %s", name);
|
1486 |
if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000) |
1487 |
error("ret; restore; not found at end of %s", name);
|
1488 |
} else {
|
1489 |
error("No save at the beginning of %s", name);
|
1490 |
} |
1491 |
|
1492 |
/* Skip a preceeding nop, if present. */
|
1493 |
if (p > p_start) {
|
1494 |
skip_insn = get32((uint32_t *)(p - 0x4));
|
1495 |
if (skip_insn == 0x01000000) |
1496 |
p -= 4;
|
1497 |
} |
1498 |
|
1499 |
copy_size = p - p_start; |
1500 |
} |
1501 |
#elif defined(HOST_ARM)
|
1502 |
{ |
1503 |
if ((p_end - p_start) <= 16) |
1504 |
error("%s: function too small", name);
|
1505 |
if (get32((uint32_t *)p_start) != 0xe1a0c00d || |
1506 |
(get32((uint32_t *)(p_start + 4)) & 0xffff0000) != 0xe92d0000 || |
1507 |
get32((uint32_t *)(p_start + 8)) != 0xe24cb004) |
1508 |
error("%s: invalid prolog", name);
|
1509 |
p_start += 12;
|
1510 |
start_offset += 12;
|
1511 |
copy_size = arm_emit_ldr_info(name, start_offset, NULL, p_start, p_end,
|
1512 |
relocs, nb_relocs); |
1513 |
} |
1514 |
#elif defined(HOST_M68K)
|
1515 |
{ |
1516 |
uint8_t *p; |
1517 |
p = (void *)(p_end - 2); |
1518 |
if (p == p_start)
|
1519 |
error("empty code for %s", name);
|
1520 |
// remove NOP's, probably added for alignment
|
1521 |
while ((get16((uint16_t *)p) == 0x4e71) && |
1522 |
(p>p_start)) |
1523 |
p -= 2;
|
1524 |
if (get16((uint16_t *)p) != 0x4e75) |
1525 |
error("rts expected at the end of %s", name);
|
1526 |
copy_size = p - p_start; |
1527 |
} |
1528 |
#else
|
1529 |
#error unsupported CPU
|
1530 |
#endif
|
1531 |
|
1532 |
/* compute the number of arguments by looking at the relocations */
|
1533 |
for(i = 0;i < MAX_ARGS; i++) |
1534 |
args_present[i] = 0;
|
1535 |
|
1536 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1537 |
host_ulong offset = get_rel_offset(rel); |
1538 |
if (offset >= start_offset &&
|
1539 |
offset < start_offset + (p_end - p_start)) { |
1540 |
sym_name = get_rel_sym_name(rel); |
1541 |
if(!sym_name)
|
1542 |
continue;
|
1543 |
if (strstart(sym_name, "__op_param", &p) || |
1544 |
strstart(sym_name, "__op_gen_label", &p)) {
|
1545 |
n = strtoul(p, NULL, 10); |
1546 |
if (n > MAX_ARGS)
|
1547 |
error("too many arguments in %s", name);
|
1548 |
args_present[n - 1] = 1; |
1549 |
} |
1550 |
} |
1551 |
} |
1552 |
|
1553 |
nb_args = 0;
|
1554 |
while (nb_args < MAX_ARGS && args_present[nb_args])
|
1555 |
nb_args++; |
1556 |
for(i = nb_args; i < MAX_ARGS; i++) {
|
1557 |
if (args_present[i])
|
1558 |
error("inconsistent argument numbering in %s", name);
|
1559 |
} |
1560 |
|
1561 |
if (gen_switch == 2) { |
1562 |
fprintf(outfile, "DEF(%s, %d, %d)\n", name + 3, nb_args, copy_size); |
1563 |
} else if (gen_switch == 1) { |
1564 |
|
1565 |
/* output C code */
|
1566 |
fprintf(outfile, "case INDEX_%s: {\n", name);
|
1567 |
if (nb_args > 0) { |
1568 |
fprintf(outfile, " long ");
|
1569 |
for(i = 0; i < nb_args; i++) { |
1570 |
if (i != 0) |
1571 |
fprintf(outfile, ", ");
|
1572 |
fprintf(outfile, "param%d", i + 1); |
1573 |
} |
1574 |
fprintf(outfile, ";\n");
|
1575 |
} |
1576 |
#if defined(HOST_IA64)
|
1577 |
fprintf(outfile, " extern char %s;\n", name);
|
1578 |
#else
|
1579 |
fprintf(outfile, " extern void %s();\n", name);
|
1580 |
#endif
|
1581 |
|
1582 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1583 |
host_ulong offset = get_rel_offset(rel); |
1584 |
if (offset >= start_offset &&
|
1585 |
offset < start_offset + (p_end - p_start)) { |
1586 |
sym_name = get_rel_sym_name(rel); |
1587 |
if(!sym_name)
|
1588 |
continue;
|
1589 |
if (*sym_name &&
|
1590 |
!strstart(sym_name, "__op_param", NULL) && |
1591 |
!strstart(sym_name, "__op_jmp", NULL) && |
1592 |
!strstart(sym_name, "__op_gen_label", NULL)) { |
1593 |
#if defined(HOST_SPARC)
|
1594 |
if (sym_name[0] == '.') { |
1595 |
fprintf(outfile, |
1596 |
"extern char __dot_%s __asm__(\"%s\");\n",
|
1597 |
sym_name+1, sym_name);
|
1598 |
continue;
|
1599 |
} |
1600 |
#endif
|
1601 |
#if defined(__APPLE__)
|
1602 |
/* set __attribute((unused)) on darwin because we wan't to avoid warning when we don't use the symbol */
|
1603 |
fprintf(outfile, "extern char %s __attribute__((unused));\n", sym_name);
|
1604 |
#elif defined(HOST_IA64)
|
1605 |
if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
|
1606 |
/*
|
1607 |
* PCREL21 br.call targets generally
|
1608 |
* are out of range and need to go
|
1609 |
* through an "import stub".
|
1610 |
*/
|
1611 |
fprintf(outfile, " extern char %s;\n",
|
1612 |
sym_name); |
1613 |
#else
|
1614 |
fprintf(outfile, "extern char %s;\n", sym_name);
|
1615 |
#endif
|
1616 |
} |
1617 |
} |
1618 |
} |
1619 |
|
1620 |
fprintf(outfile, " memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n",
|
1621 |
name, (int)(start_offset - offset), copy_size);
|
1622 |
|
1623 |
/* emit code offset information */
|
1624 |
{ |
1625 |
EXE_SYM *sym; |
1626 |
const char *sym_name, *p; |
1627 |
unsigned long val; |
1628 |
int n;
|
1629 |
|
1630 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
1631 |
sym_name = get_sym_name(sym); |
1632 |
if (strstart(sym_name, "__op_label", &p)) { |
1633 |
uint8_t *ptr; |
1634 |
unsigned long offset; |
1635 |
|
1636 |
/* test if the variable refers to a label inside
|
1637 |
the code we are generating */
|
1638 |
#ifdef CONFIG_FORMAT_COFF
|
1639 |
if (sym->st_shndx == text_shndx) {
|
1640 |
ptr = sdata[coff_text_shndx]; |
1641 |
} else if (sym->st_shndx == data_shndx) { |
1642 |
ptr = sdata[coff_data_shndx]; |
1643 |
} else {
|
1644 |
ptr = NULL;
|
1645 |
} |
1646 |
#elif defined(CONFIG_FORMAT_MACH)
|
1647 |
if(!sym->n_sect)
|
1648 |
continue;
|
1649 |
ptr = sdata[sym->n_sect-1];
|
1650 |
#else
|
1651 |
ptr = sdata[sym->st_shndx]; |
1652 |
#endif
|
1653 |
if (!ptr)
|
1654 |
error("__op_labelN in invalid section");
|
1655 |
offset = sym->st_value; |
1656 |
#ifdef CONFIG_FORMAT_MACH
|
1657 |
offset -= section_hdr[sym->n_sect-1].addr;
|
1658 |
#endif
|
1659 |
val = *(unsigned long *)(ptr + offset); |
1660 |
#ifdef ELF_USES_RELOCA
|
1661 |
{ |
1662 |
int reloc_shndx, nb_relocs1, j;
|
1663 |
|
1664 |
/* try to find a matching relocation */
|
1665 |
reloc_shndx = find_reloc(sym->st_shndx); |
1666 |
if (reloc_shndx) {
|
1667 |
nb_relocs1 = shdr[reloc_shndx].sh_size / |
1668 |
shdr[reloc_shndx].sh_entsize; |
1669 |
rel = (ELF_RELOC *)sdata[reloc_shndx]; |
1670 |
for(j = 0; j < nb_relocs1; j++) { |
1671 |
if (rel->r_offset == offset) {
|
1672 |
val = rel->r_addend; |
1673 |
break;
|
1674 |
} |
1675 |
rel++; |
1676 |
} |
1677 |
} |
1678 |
} |
1679 |
#endif
|
1680 |
if (val >= start_offset && val <= start_offset + copy_size) {
|
1681 |
n = strtol(p, NULL, 10); |
1682 |
fprintf(outfile, " label_offsets[%d] = %ld + (gen_code_ptr - gen_code_buf);\n", n, (long)(val - start_offset)); |
1683 |
} |
1684 |
} |
1685 |
} |
1686 |
} |
1687 |
|
1688 |
/* load parameres in variables */
|
1689 |
for(i = 0; i < nb_args; i++) { |
1690 |
fprintf(outfile, " param%d = *opparam_ptr++;\n", i + 1); |
1691 |
} |
1692 |
|
1693 |
/* patch relocations */
|
1694 |
#if defined(HOST_I386)
|
1695 |
{ |
1696 |
char name[256]; |
1697 |
int type;
|
1698 |
int addend;
|
1699 |
int reloc_offset;
|
1700 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1701 |
if (rel->r_offset >= start_offset &&
|
1702 |
rel->r_offset < start_offset + copy_size) { |
1703 |
sym_name = get_rel_sym_name(rel); |
1704 |
if (!sym_name)
|
1705 |
continue;
|
1706 |
reloc_offset = rel->r_offset - start_offset; |
1707 |
if (strstart(sym_name, "__op_jmp", &p)) { |
1708 |
int n;
|
1709 |
n = strtol(p, NULL, 10); |
1710 |
/* __op_jmp relocations are done at
|
1711 |
runtime to do translated block
|
1712 |
chaining: the offset of the instruction
|
1713 |
needs to be stored */
|
1714 |
fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
|
1715 |
n, reloc_offset); |
1716 |
continue;
|
1717 |
} |
1718 |
|
1719 |
get_reloc_expr(name, sizeof(name), sym_name);
|
1720 |
addend = get32((uint32_t *)(text + rel->r_offset)); |
1721 |
#ifdef CONFIG_FORMAT_ELF
|
1722 |
type = ELF32_R_TYPE(rel->r_info); |
1723 |
switch(type) {
|
1724 |
case R_386_32:
|
1725 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
1726 |
reloc_offset, name, addend); |
1727 |
break;
|
1728 |
case R_386_PC32:
|
1729 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
|
1730 |
reloc_offset, name, reloc_offset, addend); |
1731 |
break;
|
1732 |
default:
|
1733 |
error("unsupported i386 relocation (%d)", type);
|
1734 |
} |
1735 |
#elif defined(CONFIG_FORMAT_COFF)
|
1736 |
{ |
1737 |
char *temp_name;
|
1738 |
int j;
|
1739 |
EXE_SYM *sym; |
1740 |
temp_name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx)); |
1741 |
if (!strcmp(temp_name, ".data")) { |
1742 |
for (j = 0, sym = symtab; j < nb_syms; j++, sym++) { |
1743 |
if (strstart(sym->st_name, sym_name, NULL)) { |
1744 |
addend -= sym->st_value; |
1745 |
} |
1746 |
} |
1747 |
} |
1748 |
} |
1749 |
type = rel->r_type; |
1750 |
switch(type) {
|
1751 |
case DIR32:
|
1752 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
1753 |
reloc_offset, name, addend); |
1754 |
break;
|
1755 |
case DISP32:
|
1756 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d -4;\n",
|
1757 |
reloc_offset, name, reloc_offset, addend); |
1758 |
break;
|
1759 |
default:
|
1760 |
error("unsupported i386 relocation (%d)", type);
|
1761 |
} |
1762 |
#else
|
1763 |
#error unsupport object format
|
1764 |
#endif
|
1765 |
} |
1766 |
} |
1767 |
} |
1768 |
#elif defined(HOST_X86_64)
|
1769 |
{ |
1770 |
char name[256]; |
1771 |
int type;
|
1772 |
int addend;
|
1773 |
int reloc_offset;
|
1774 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1775 |
if (rel->r_offset >= start_offset &&
|
1776 |
rel->r_offset < start_offset + copy_size) { |
1777 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
1778 |
get_reloc_expr(name, sizeof(name), sym_name);
|
1779 |
type = ELF32_R_TYPE(rel->r_info); |
1780 |
addend = rel->r_addend; |
1781 |
reloc_offset = rel->r_offset - start_offset; |
1782 |
switch(type) {
|
1783 |
case R_X86_64_32:
|
1784 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (uint32_t)%s + %d;\n",
|
1785 |
reloc_offset, name, addend); |
1786 |
break;
|
1787 |
case R_X86_64_32S:
|
1788 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (int32_t)%s + %d;\n",
|
1789 |
reloc_offset, name, addend); |
1790 |
break;
|
1791 |
case R_X86_64_PC32:
|
1792 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
|
1793 |
reloc_offset, name, reloc_offset, addend); |
1794 |
break;
|
1795 |
default:
|
1796 |
error("unsupported X86_64 relocation (%d)", type);
|
1797 |
} |
1798 |
} |
1799 |
} |
1800 |
} |
1801 |
#elif defined(HOST_PPC)
|
1802 |
{ |
1803 |
#ifdef CONFIG_FORMAT_ELF
|
1804 |
char name[256]; |
1805 |
int type;
|
1806 |
int addend;
|
1807 |
int reloc_offset;
|
1808 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1809 |
if (rel->r_offset >= start_offset &&
|
1810 |
rel->r_offset < start_offset + copy_size) { |
1811 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
1812 |
reloc_offset = rel->r_offset - start_offset; |
1813 |
if (strstart(sym_name, "__op_jmp", &p)) { |
1814 |
int n;
|
1815 |
n = strtol(p, NULL, 10); |
1816 |
/* __op_jmp relocations are done at
|
1817 |
runtime to do translated block
|
1818 |
chaining: the offset of the instruction
|
1819 |
needs to be stored */
|
1820 |
fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
|
1821 |
n, reloc_offset); |
1822 |
continue;
|
1823 |
} |
1824 |
|
1825 |
get_reloc_expr(name, sizeof(name), sym_name);
|
1826 |
type = ELF32_R_TYPE(rel->r_info); |
1827 |
addend = rel->r_addend; |
1828 |
switch(type) {
|
1829 |
case R_PPC_ADDR32:
|
1830 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
1831 |
reloc_offset, name, addend); |
1832 |
break;
|
1833 |
case R_PPC_ADDR16_LO:
|
1834 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n",
|
1835 |
reloc_offset, name, addend); |
1836 |
break;
|
1837 |
case R_PPC_ADDR16_HI:
|
1838 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n",
|
1839 |
reloc_offset, name, addend); |
1840 |
break;
|
1841 |
case R_PPC_ADDR16_HA:
|
1842 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n",
|
1843 |
reloc_offset, name, addend); |
1844 |
break;
|
1845 |
case R_PPC_REL24:
|
1846 |
/* warning: must be at 32 MB distancy */
|
1847 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((%s - (long)(gen_code_ptr + %d) + %d) & 0x03fffffc);\n",
|
1848 |
reloc_offset, reloc_offset, name, reloc_offset, addend); |
1849 |
break;
|
1850 |
default:
|
1851 |
error("unsupported powerpc relocation (%d)", type);
|
1852 |
} |
1853 |
} |
1854 |
} |
1855 |
#elif defined(CONFIG_FORMAT_MACH)
|
1856 |
struct scattered_relocation_info *scarel;
|
1857 |
struct relocation_info * rel;
|
1858 |
char final_sym_name[256]; |
1859 |
const char *sym_name; |
1860 |
const char *p; |
1861 |
int slide, sslide;
|
1862 |
int i;
|
1863 |
|
1864 |
for(i = 0, rel = relocs; i < nb_relocs; i++, rel++) { |
1865 |
unsigned int offset, length, value = 0; |
1866 |
unsigned int type, pcrel, isym = 0; |
1867 |
unsigned int usesym = 0; |
1868 |
|
1869 |
if(R_SCATTERED & rel->r_address) {
|
1870 |
scarel = (struct scattered_relocation_info*)rel;
|
1871 |
offset = (unsigned int)scarel->r_address; |
1872 |
length = scarel->r_length; |
1873 |
pcrel = scarel->r_pcrel; |
1874 |
type = scarel->r_type; |
1875 |
value = scarel->r_value; |
1876 |
} else {
|
1877 |
value = isym = rel->r_symbolnum; |
1878 |
usesym = (rel->r_extern); |
1879 |
offset = rel->r_address; |
1880 |
length = rel->r_length; |
1881 |
pcrel = rel->r_pcrel; |
1882 |
type = rel->r_type; |
1883 |
} |
1884 |
|
1885 |
slide = offset - start_offset; |
1886 |
|
1887 |
if (!(offset >= start_offset && offset < start_offset + size))
|
1888 |
continue; /* not in our range */ |
1889 |
|
1890 |
sym_name = get_reloc_name(rel, &sslide); |
1891 |
|
1892 |
if(usesym && symtab[isym].n_type & N_STAB)
|
1893 |
continue; /* don't handle STAB (debug sym) */ |
1894 |
|
1895 |
if (sym_name && strstart(sym_name, "__op_jmp", &p)) { |
1896 |
int n;
|
1897 |
n = strtol(p, NULL, 10); |
1898 |
fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
|
1899 |
n, slide); |
1900 |
continue; /* Nothing more to do */ |
1901 |
} |
1902 |
|
1903 |
if(!sym_name)
|
1904 |
{ |
1905 |
fprintf(outfile, "/* #warning relocation not handled in %s (value 0x%x, %s, offset 0x%x, length 0x%x, %s, type 0x%x) */\n",
|
1906 |
name, value, usesym ? "use sym" : "don't use sym", offset, length, pcrel ? "pcrel":"", type); |
1907 |
continue; /* dunno how to handle without final_sym_name */ |
1908 |
} |
1909 |
|
1910 |
get_reloc_expr(final_sym_name, sizeof(final_sym_name),
|
1911 |
sym_name); |
1912 |
switch(type) {
|
1913 |
case PPC_RELOC_BR24:
|
1914 |
if (!strstart(sym_name,"__op_gen_label",&p)) { |
1915 |
fprintf(outfile, "{\n");
|
1916 |
fprintf(outfile, " uint32_t imm = *(uint32_t *)(gen_code_ptr + %d) & 0x3fffffc;\n", slide);
|
1917 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((imm + ((long)%s - (long)gen_code_ptr) + %d) & 0x03fffffc);\n",
|
1918 |
slide, slide, name, sslide ); |
1919 |
fprintf(outfile, "}\n");
|
1920 |
} else {
|
1921 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | (((long)%s - (long)gen_code_ptr - %d) & 0x03fffffc);\n",
|
1922 |
slide, slide, final_sym_name, slide); |
1923 |
} |
1924 |
break;
|
1925 |
case PPC_RELOC_HI16:
|
1926 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d) >> 16;\n",
|
1927 |
slide, final_sym_name, sslide); |
1928 |
break;
|
1929 |
case PPC_RELOC_LO16:
|
1930 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d);\n",
|
1931 |
slide, final_sym_name, sslide); |
1932 |
break;
|
1933 |
case PPC_RELOC_HA16:
|
1934 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d + 0x8000) >> 16;\n",
|
1935 |
slide, final_sym_name, sslide); |
1936 |
break;
|
1937 |
default:
|
1938 |
error("unsupported powerpc relocation (%d)", type);
|
1939 |
} |
1940 |
} |
1941 |
#else
|
1942 |
#error unsupport object format
|
1943 |
#endif
|
1944 |
} |
1945 |
#elif defined(HOST_S390)
|
1946 |
{ |
1947 |
char name[256]; |
1948 |
int type;
|
1949 |
int addend;
|
1950 |
int reloc_offset;
|
1951 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1952 |
if (rel->r_offset >= start_offset &&
|
1953 |
rel->r_offset < start_offset + copy_size) { |
1954 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
1955 |
get_reloc_expr(name, sizeof(name), sym_name);
|
1956 |
type = ELF32_R_TYPE(rel->r_info); |
1957 |
addend = rel->r_addend; |
1958 |
reloc_offset = rel->r_offset - start_offset; |
1959 |
switch(type) {
|
1960 |
case R_390_32:
|
1961 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
1962 |
reloc_offset, name, addend); |
1963 |
break;
|
1964 |
case R_390_16:
|
1965 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
1966 |
reloc_offset, name, addend); |
1967 |
break;
|
1968 |
case R_390_8:
|
1969 |
fprintf(outfile, " *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
1970 |
reloc_offset, name, addend); |
1971 |
break;
|
1972 |
default:
|
1973 |
error("unsupported s390 relocation (%d)", type);
|
1974 |
} |
1975 |
} |
1976 |
} |
1977 |
} |
1978 |
#elif defined(HOST_ALPHA)
|
1979 |
{ |
1980 |
for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) { |
1981 |
if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
|
1982 |
int type;
|
1983 |
long reloc_offset;
|
1984 |
|
1985 |
type = ELF64_R_TYPE(rel->r_info); |
1986 |
sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name; |
1987 |
reloc_offset = rel->r_offset - start_offset; |
1988 |
switch (type) {
|
1989 |
case R_ALPHA_GPDISP:
|
1990 |
/* The gp is just 32 bit, and never changes, so it's easiest to emit it
|
1991 |
as an immediate instead of constructing it from the pv or ra. */
|
1992 |
fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, gp);\n",
|
1993 |
reloc_offset); |
1994 |
fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, gp);\n",
|
1995 |
reloc_offset + (int)rel->r_addend);
|
1996 |
break;
|
1997 |
case R_ALPHA_LITUSE:
|
1998 |
/* jsr to literal hint. Could be used to optimize to bsr. Ignore for
|
1999 |
now, since some called functions (libc) need pv to be set up. */
|
2000 |
break;
|
2001 |
case R_ALPHA_HINT:
|
2002 |
/* Branch target prediction hint. Ignore for now. Should be already
|
2003 |
correct for in-function jumps. */
|
2004 |
break;
|
2005 |
case R_ALPHA_LITERAL:
|
2006 |
/* Load a literal from the GOT relative to the gp. Since there's only a
|
2007 |
single gp, nothing is to be done. */
|
2008 |
break;
|
2009 |
case R_ALPHA_GPRELHIGH:
|
2010 |
/* Handle fake relocations against __op_param symbol. Need to emit the
|
2011 |
high part of the immediate value instead. Other symbols need no
|
2012 |
special treatment. */
|
2013 |
if (strstart(sym_name, "__op_param", &p)) |
2014 |
fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, param%s);\n",
|
2015 |
reloc_offset, p); |
2016 |
break;
|
2017 |
case R_ALPHA_GPRELLOW:
|
2018 |
if (strstart(sym_name, "__op_param", &p)) |
2019 |
fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, param%s);\n",
|
2020 |
reloc_offset, p); |
2021 |
break;
|
2022 |
case R_ALPHA_BRSGP:
|
2023 |
/* PC-relative jump. Tweak offset to skip the two instructions that try to
|
2024 |
set up the gp from the pv. */
|
2025 |
fprintf(outfile, " fix_bsr(gen_code_ptr + %ld, (uint8_t *) &%s - (gen_code_ptr + %ld + 4) + 8);\n",
|
2026 |
reloc_offset, sym_name, reloc_offset); |
2027 |
break;
|
2028 |
default:
|
2029 |
error("unsupported Alpha relocation (%d)", type);
|
2030 |
} |
2031 |
} |
2032 |
} |
2033 |
} |
2034 |
#elif defined(HOST_IA64)
|
2035 |
{ |
2036 |
unsigned long sym_idx; |
2037 |
long code_offset;
|
2038 |
char name[256]; |
2039 |
int type;
|
2040 |
long addend;
|
2041 |
|
2042 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
2043 |
sym_idx = ELF64_R_SYM(rel->r_info); |
2044 |
if (rel->r_offset < start_offset
|
2045 |
|| rel->r_offset >= start_offset + copy_size) |
2046 |
continue;
|
2047 |
sym_name = (strtab + symtab[sym_idx].st_name); |
2048 |
code_offset = rel->r_offset - start_offset; |
2049 |
if (strstart(sym_name, "__op_jmp", &p)) { |
2050 |
int n;
|
2051 |
n = strtol(p, NULL, 10); |
2052 |
/* __op_jmp relocations are done at
|
2053 |
runtime to do translated block
|
2054 |
chaining: the offset of the instruction
|
2055 |
needs to be stored */
|
2056 |
fprintf(outfile, " jmp_offsets[%d] ="
|
2057 |
"%ld + (gen_code_ptr - gen_code_buf);\n",
|
2058 |
n, code_offset); |
2059 |
continue;
|
2060 |
} |
2061 |
get_reloc_expr(name, sizeof(name), sym_name);
|
2062 |
type = ELF64_R_TYPE(rel->r_info); |
2063 |
addend = rel->r_addend; |
2064 |
switch(type) {
|
2065 |
case R_IA64_IMM64:
|
2066 |
fprintf(outfile, |
2067 |
" ia64_imm64(gen_code_ptr + %ld, "
|
2068 |
"%s + %ld);\n",
|
2069 |
code_offset, name, addend); |
2070 |
break;
|
2071 |
case R_IA64_LTOFF22X:
|
2072 |
case R_IA64_LTOFF22:
|
2073 |
fprintf(outfile, " IA64_LTOFF(gen_code_ptr + %ld,"
|
2074 |
" %s + %ld, %d);\n",
|
2075 |
code_offset, name, addend, |
2076 |
(type == R_IA64_LTOFF22X)); |
2077 |
break;
|
2078 |
case R_IA64_LDXMOV:
|
2079 |
fprintf(outfile, |
2080 |
" ia64_ldxmov(gen_code_ptr + %ld,"
|
2081 |
" %s + %ld);\n", code_offset, name, addend);
|
2082 |
break;
|
2083 |
|
2084 |
case R_IA64_PCREL21B:
|
2085 |
if (strstart(sym_name, "__op_gen_label", NULL)) { |
2086 |
fprintf(outfile, |
2087 |
" ia64_imm21b(gen_code_ptr + %ld,"
|
2088 |
" (long) (%s + %ld -\n\t\t"
|
2089 |
"((long) gen_code_ptr + %ld)) >> 4);\n",
|
2090 |
code_offset, name, addend, |
2091 |
code_offset & ~0xfUL);
|
2092 |
} else {
|
2093 |
fprintf(outfile, |
2094 |
" IA64_PLT(gen_code_ptr + %ld, "
|
2095 |
"%d);\t/* %s + %ld */\n",
|
2096 |
code_offset, |
2097 |
get_plt_index(sym_name, addend), |
2098 |
sym_name, addend); |
2099 |
} |
2100 |
break;
|
2101 |
default:
|
2102 |
error("unsupported ia64 relocation (0x%x)",
|
2103 |
type); |
2104 |
} |
2105 |
} |
2106 |
fprintf(outfile, " ia64_nop_b(gen_code_ptr + %d);\n",
|
2107 |
copy_size - 16 + 2); |
2108 |
} |
2109 |
#elif defined(HOST_SPARC)
|
2110 |
{ |
2111 |
char name[256]; |
2112 |
int type;
|
2113 |
int addend;
|
2114 |
int reloc_offset;
|
2115 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
2116 |
if (rel->r_offset >= start_offset &&
|
2117 |
rel->r_offset < start_offset + copy_size) { |
2118 |
sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name; |
2119 |
get_reloc_expr(name, sizeof(name), sym_name);
|
2120 |
type = ELF32_R_TYPE(rel->r_info); |
2121 |
addend = rel->r_addend; |
2122 |
reloc_offset = rel->r_offset - start_offset; |
2123 |
switch(type) {
|
2124 |
case R_SPARC_32:
|
2125 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
2126 |
reloc_offset, name, addend); |
2127 |
break;
|
2128 |
case R_SPARC_HI22:
|
2129 |
fprintf(outfile, |
2130 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2131 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
2132 |
" & ~0x3fffff) "
|
2133 |
" | (((%s + %d) >> 10) & 0x3fffff);\n",
|
2134 |
reloc_offset, reloc_offset, name, addend); |
2135 |
break;
|
2136 |
case R_SPARC_LO10:
|
2137 |
fprintf(outfile, |
2138 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2139 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
2140 |
" & ~0x3ff) "
|
2141 |
" | ((%s + %d) & 0x3ff);\n",
|
2142 |
reloc_offset, reloc_offset, name, addend); |
2143 |
break;
|
2144 |
case R_SPARC_WDISP30:
|
2145 |
fprintf(outfile, |
2146 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2147 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
2148 |
" & ~0x3fffffff) "
|
2149 |
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
|
2150 |
" & 0x3fffffff);\n",
|
2151 |
reloc_offset, reloc_offset, name, addend, |
2152 |
reloc_offset); |
2153 |
break;
|
2154 |
default:
|
2155 |
error("unsupported sparc relocation (%d)", type);
|
2156 |
} |
2157 |
} |
2158 |
} |
2159 |
} |
2160 |
#elif defined(HOST_SPARC64)
|
2161 |
{ |
2162 |
char name[256]; |
2163 |
int type;
|
2164 |
int addend;
|
2165 |
int reloc_offset;
|
2166 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
2167 |
if (rel->r_offset >= start_offset &&
|
2168 |
rel->r_offset < start_offset + copy_size) { |
2169 |
sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name; |
2170 |
get_reloc_expr(name, sizeof(name), sym_name);
|
2171 |
type = ELF64_R_TYPE(rel->r_info); |
2172 |
addend = rel->r_addend; |
2173 |
reloc_offset = rel->r_offset - start_offset; |
2174 |
switch(type) {
|
2175 |
case R_SPARC_32:
|
2176 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
2177 |
reloc_offset, name, addend); |
2178 |
break;
|
2179 |
case R_SPARC_HI22:
|
2180 |
fprintf(outfile, |
2181 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2182 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
2183 |
" & ~0x3fffff) "
|
2184 |
" | (((%s + %d) >> 10) & 0x3fffff);\n",
|
2185 |
reloc_offset, reloc_offset, name, addend); |
2186 |
break;
|
2187 |
case R_SPARC_LO10:
|
2188 |
fprintf(outfile, |
2189 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2190 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
2191 |
" & ~0x3ff) "
|
2192 |
" | ((%s + %d) & 0x3ff);\n",
|
2193 |
reloc_offset, reloc_offset, name, addend); |
2194 |
break;
|
2195 |
case R_SPARC_WDISP30:
|
2196 |
fprintf(outfile, |
2197 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
2198 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
2199 |
" & ~0x3fffffff) "
|
2200 |
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
|
2201 |
" & 0x3fffffff);\n",
|
2202 |
reloc_offset, reloc_offset, name, addend, |
2203 |
reloc_offset); |
2204 |
break;
|
2205 |
default:
|
2206 |
error("unsupported sparc64 relocation (%d)", type);
|
2207 |
} |
2208 |
} |
2209 |
} |
2210 |
} |
2211 |
#elif defined(HOST_ARM)
|
2212 |
{ |
2213 |
char name[256]; |
2214 |
int type;
|
2215 |
int addend;
|
2216 |
int reloc_offset;
|
2217 |
|
2218 |
arm_emit_ldr_info(name, start_offset, outfile, p_start, p_end, |
2219 |
relocs, nb_relocs); |
2220 |
|
2221 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
2222 |
if (rel->r_offset >= start_offset &&
|
2223 |
rel->r_offset < start_offset + copy_size) { |
2224 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
2225 |
/* the compiler leave some unnecessary references to the code */
|
2226 |
if (sym_name[0] == '\0') |
2227 |
continue;
|
2228 |
get_reloc_expr(name, sizeof(name), sym_name);
|
2229 |
type = ELF32_R_TYPE(rel->r_info); |
2230 |
addend = get32((uint32_t *)(text + rel->r_offset)); |
2231 |
reloc_offset = rel->r_offset - start_offset; |
2232 |
switch(type) {
|
2233 |
case R_ARM_ABS32:
|
2234 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
2235 |
reloc_offset, name, addend); |
2236 |
break;
|
2237 |
case R_ARM_PC24:
|
2238 |
fprintf(outfile, " arm_reloc_pc24((uint32_t *)(gen_code_ptr + %d), 0x%x, %s);\n",
|
2239 |
reloc_offset, addend, name); |
2240 |
break;
|
2241 |
default:
|
2242 |
error("unsupported arm relocation (%d)", type);
|
2243 |
} |
2244 |
} |
2245 |
} |
2246 |
} |
2247 |
#elif defined(HOST_M68K)
|
2248 |
{ |
2249 |
char name[256]; |
2250 |
int type;
|
2251 |
int addend;
|
2252 |
int reloc_offset;
|
2253 |
Elf32_Sym *sym; |
2254 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
2255 |
if (rel->r_offset >= start_offset &&
|
2256 |
rel->r_offset < start_offset + copy_size) { |
2257 |
sym = &(symtab[ELFW(R_SYM)(rel->r_info)]); |
2258 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
2259 |
get_reloc_expr(name, sizeof(name), sym_name);
|
2260 |
type = ELF32_R_TYPE(rel->r_info); |
2261 |
addend = get32((uint32_t *)(text + rel->r_offset)) + rel->r_addend; |
2262 |
reloc_offset = rel->r_offset - start_offset; |
2263 |
switch(type) {
|
2264 |
case R_68K_32:
|
2265 |
fprintf(outfile, " /* R_68K_32 RELOC, offset %x */\n", rel->r_offset) ;
|
2266 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %#x;\n",
|
2267 |
reloc_offset, name, addend ); |
2268 |
break;
|
2269 |
case R_68K_PC32:
|
2270 |
fprintf(outfile, " /* R_68K_PC32 RELOC, offset %x */\n", rel->r_offset);
|
2271 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %#x) + %#x;\n",
|
2272 |
reloc_offset, name, reloc_offset, /*sym->st_value+*/ addend);
|
2273 |
break;
|
2274 |
default:
|
2275 |
error("unsupported m68k relocation (%d)", type);
|
2276 |
} |
2277 |
} |
2278 |
} |
2279 |
} |
2280 |
#else
|
2281 |
#error unsupported CPU
|
2282 |
#endif
|
2283 |
fprintf(outfile, " gen_code_ptr += %d;\n", copy_size);
|
2284 |
fprintf(outfile, "}\n");
|
2285 |
fprintf(outfile, "break;\n\n");
|
2286 |
} else {
|
2287 |
fprintf(outfile, "static inline void gen_%s(", name);
|
2288 |
if (nb_args == 0) { |
2289 |
fprintf(outfile, "void");
|
2290 |
} else {
|
2291 |
for(i = 0; i < nb_args; i++) { |
2292 |
if (i != 0) |
2293 |
fprintf(outfile, ", ");
|
2294 |
fprintf(outfile, "long param%d", i + 1); |
2295 |
} |
2296 |
} |
2297 |
fprintf(outfile, ")\n");
|
2298 |
fprintf(outfile, "{\n");
|
2299 |
for(i = 0; i < nb_args; i++) { |
2300 |
fprintf(outfile, " *gen_opparam_ptr++ = param%d;\n", i + 1); |
2301 |
} |
2302 |
fprintf(outfile, " *gen_opc_ptr++ = INDEX_%s;\n", name);
|
2303 |
fprintf(outfile, "}\n\n");
|
2304 |
} |
2305 |
} |
2306 |
|
2307 |
int gen_file(FILE *outfile, int out_type) |
2308 |
{ |
2309 |
int i;
|
2310 |
EXE_SYM *sym; |
2311 |
|
2312 |
if (out_type == OUT_INDEX_OP) {
|
2313 |
fprintf(outfile, "DEF(end, 0, 0)\n");
|
2314 |
fprintf(outfile, "DEF(nop, 0, 0)\n");
|
2315 |
fprintf(outfile, "DEF(nop1, 1, 0)\n");
|
2316 |
fprintf(outfile, "DEF(nop2, 2, 0)\n");
|
2317 |
fprintf(outfile, "DEF(nop3, 3, 0)\n");
|
2318 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
2319 |
const char *name; |
2320 |
name = get_sym_name(sym); |
2321 |
if (strstart(name, OP_PREFIX, NULL)) { |
2322 |
gen_code(name, sym->st_value, sym->st_size, outfile, 2);
|
2323 |
} |
2324 |
} |
2325 |
} else if (out_type == OUT_GEN_OP) { |
2326 |
/* generate gen_xxx functions */
|
2327 |
fprintf(outfile, "#include \"dyngen-op.h\"\n");
|
2328 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
2329 |
const char *name; |
2330 |
name = get_sym_name(sym); |
2331 |
if (strstart(name, OP_PREFIX, NULL)) { |
2332 |
#if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
|
2333 |
if (sym->st_shndx != text_shndx)
|
2334 |
error("invalid section for opcode (0x%x)", sym->st_shndx);
|
2335 |
#endif
|
2336 |
gen_code(name, sym->st_value, sym->st_size, outfile, 0);
|
2337 |
} |
2338 |
} |
2339 |
|
2340 |
} else {
|
2341 |
/* generate big code generation switch */
|
2342 |
fprintf(outfile, |
2343 |
"int dyngen_code(uint8_t *gen_code_buf,\n"
|
2344 |
" uint16_t *label_offsets, uint16_t *jmp_offsets,\n"
|
2345 |
" const uint16_t *opc_buf, const uint32_t *opparam_buf, const long *gen_labels)\n"
|
2346 |
"{\n"
|
2347 |
" uint8_t *gen_code_ptr;\n"
|
2348 |
" const uint16_t *opc_ptr;\n"
|
2349 |
" const uint32_t *opparam_ptr;\n");
|
2350 |
|
2351 |
#ifdef HOST_ARM
|
2352 |
fprintf(outfile, |
2353 |
" uint8_t *last_gen_code_ptr = gen_code_buf;\n"
|
2354 |
" LDREntry *arm_ldr_ptr = arm_ldr_table;\n"
|
2355 |
" uint32_t *arm_data_ptr = arm_data_table;\n");
|
2356 |
#endif
|
2357 |
#ifdef HOST_IA64
|
2358 |
{ |
2359 |
long addend, not_first = 0; |
2360 |
unsigned long sym_idx; |
2361 |
int index, max_index;
|
2362 |
const char *sym_name; |
2363 |
EXE_RELOC *rel; |
2364 |
|
2365 |
max_index = -1;
|
2366 |
for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
2367 |
sym_idx = ELF64_R_SYM(rel->r_info); |
2368 |
sym_name = (strtab + symtab[sym_idx].st_name); |
2369 |
if (strstart(sym_name, "__op_gen_label", NULL)) |
2370 |
continue;
|
2371 |
if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
|
2372 |
continue;
|
2373 |
|
2374 |
addend = rel->r_addend; |
2375 |
index = get_plt_index(sym_name, addend); |
2376 |
if (index <= max_index)
|
2377 |
continue;
|
2378 |
max_index = index; |
2379 |
fprintf(outfile, " extern void %s(void);\n", sym_name);
|
2380 |
} |
2381 |
|
2382 |
fprintf(outfile, |
2383 |
" struct ia64_fixup *plt_fixes = NULL, "
|
2384 |
"*ltoff_fixes = NULL;\n"
|
2385 |
" static long plt_target[] = {\n\t");
|
2386 |
|
2387 |
max_index = -1;
|
2388 |
for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
2389 |
sym_idx = ELF64_R_SYM(rel->r_info); |
2390 |
sym_name = (strtab + symtab[sym_idx].st_name); |
2391 |
if (strstart(sym_name, "__op_gen_label", NULL)) |
2392 |
continue;
|
2393 |
if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
|
2394 |
continue;
|
2395 |
|
2396 |
addend = rel->r_addend; |
2397 |
index = get_plt_index(sym_name, addend); |
2398 |
if (index <= max_index)
|
2399 |
continue;
|
2400 |
max_index = index; |
2401 |
|
2402 |
if (not_first)
|
2403 |
fprintf(outfile, ",\n\t");
|
2404 |
not_first = 1;
|
2405 |
if (addend)
|
2406 |
fprintf(outfile, "(long) &%s + %ld", sym_name, addend);
|
2407 |
else
|
2408 |
fprintf(outfile, "(long) &%s", sym_name);
|
2409 |
} |
2410 |
fprintf(outfile, "\n };\n"
|
2411 |
" unsigned int plt_offset[%u] = { 0 };\n", max_index + 1); |
2412 |
} |
2413 |
#endif
|
2414 |
|
2415 |
fprintf(outfile, |
2416 |
"\n"
|
2417 |
" gen_code_ptr = gen_code_buf;\n"
|
2418 |
" opc_ptr = opc_buf;\n"
|
2419 |
" opparam_ptr = opparam_buf;\n");
|
2420 |
|
2421 |
/* Generate prologue, if needed. */
|
2422 |
|
2423 |
fprintf(outfile, |
2424 |
" for(;;) {\n"
|
2425 |
" switch(*opc_ptr++) {\n"
|
2426 |
); |
2427 |
|
2428 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
2429 |
const char *name; |
2430 |
name = get_sym_name(sym); |
2431 |
if (strstart(name, OP_PREFIX, NULL)) { |
2432 |
#if 0
|
2433 |
printf("%4d: %s pos=0x%08x len=%d\n",
|
2434 |
i, name, sym->st_value, sym->st_size);
|
2435 |
#endif
|
2436 |
#if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
|
2437 |
if (sym->st_shndx != text_shndx)
|
2438 |
error("invalid section for opcode (0x%x)", sym->st_shndx);
|
2439 |
#endif
|
2440 |
gen_code(name, sym->st_value, sym->st_size, outfile, 1);
|
2441 |
} |
2442 |
} |
2443 |
|
2444 |
fprintf(outfile, |
2445 |
" case INDEX_op_nop:\n"
|
2446 |
" break;\n"
|
2447 |
" case INDEX_op_nop1:\n"
|
2448 |
" opparam_ptr++;\n"
|
2449 |
" break;\n"
|
2450 |
" case INDEX_op_nop2:\n"
|
2451 |
" opparam_ptr += 2;\n"
|
2452 |
" break;\n"
|
2453 |
" case INDEX_op_nop3:\n"
|
2454 |
" opparam_ptr += 3;\n"
|
2455 |
" break;\n"
|
2456 |
" default:\n"
|
2457 |
" goto the_end;\n"
|
2458 |
" }\n");
|
2459 |
|
2460 |
#ifdef HOST_ARM
|
2461 |
/* generate constant table if needed */
|
2462 |
fprintf(outfile, |
2463 |
" if ((gen_code_ptr - last_gen_code_ptr) >= (MAX_FRAG_SIZE - MAX_OP_SIZE)) {\n"
|
2464 |
" gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 1);\n"
|
2465 |
" last_gen_code_ptr = gen_code_ptr;\n"
|
2466 |
" arm_ldr_ptr = arm_ldr_table;\n"
|
2467 |
" arm_data_ptr = arm_data_table;\n"
|
2468 |
" }\n");
|
2469 |
#endif
|
2470 |
|
2471 |
|
2472 |
fprintf(outfile, |
2473 |
" }\n"
|
2474 |
" the_end:\n"
|
2475 |
); |
2476 |
#ifdef HOST_IA64
|
2477 |
fprintf(outfile, |
2478 |
" {\n"
|
2479 |
" extern char code_gen_buffer[];\n"
|
2480 |
" ia64_apply_fixes(&gen_code_ptr, ltoff_fixes, "
|
2481 |
"(uint64_t) code_gen_buffer + 2*(1<<20), plt_fixes,\n\t\t\t"
|
2482 |
"sizeof(plt_target)/sizeof(plt_target[0]),\n\t\t\t"
|
2483 |
"plt_target, plt_offset);\n }\n");
|
2484 |
#endif
|
2485 |
|
2486 |
/* generate some code patching */
|
2487 |
#ifdef HOST_ARM
|
2488 |
fprintf(outfile, "gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 0);\n");
|
2489 |
#endif
|
2490 |
/* flush instruction cache */
|
2491 |
fprintf(outfile, "flush_icache_range((unsigned long)gen_code_buf, (unsigned long)gen_code_ptr);\n");
|
2492 |
|
2493 |
fprintf(outfile, "return gen_code_ptr - gen_code_buf;\n");
|
2494 |
fprintf(outfile, "}\n\n");
|
2495 |
|
2496 |
} |
2497 |
|
2498 |
return 0; |
2499 |
} |
2500 |
|
2501 |
void usage(void) |
2502 |
{ |
2503 |
printf("dyngen (c) 2003 Fabrice Bellard\n"
|
2504 |
"usage: dyngen [-o outfile] [-c] objfile\n"
|
2505 |
"Generate a dynamic code generator from an object file\n"
|
2506 |
"-c output enum of operations\n"
|
2507 |
"-g output gen_op_xx() functions\n"
|
2508 |
); |
2509 |
exit(1);
|
2510 |
} |
2511 |
|
2512 |
int main(int argc, char **argv) |
2513 |
{ |
2514 |
int c, out_type;
|
2515 |
const char *filename, *outfilename; |
2516 |
FILE *outfile; |
2517 |
|
2518 |
outfilename = "out.c";
|
2519 |
out_type = OUT_CODE; |
2520 |
for(;;) {
|
2521 |
c = getopt(argc, argv, "ho:cg");
|
2522 |
if (c == -1) |
2523 |
break;
|
2524 |
switch(c) {
|
2525 |
case 'h': |
2526 |
usage(); |
2527 |
break;
|
2528 |
case 'o': |
2529 |
outfilename = optarg; |
2530 |
break;
|
2531 |
case 'c': |
2532 |
out_type = OUT_INDEX_OP; |
2533 |
break;
|
2534 |
case 'g': |
2535 |
out_type = OUT_GEN_OP; |
2536 |
break;
|
2537 |
} |
2538 |
} |
2539 |
if (optind >= argc)
|
2540 |
usage(); |
2541 |
filename = argv[optind]; |
2542 |
outfile = fopen(outfilename, "w");
|
2543 |
if (!outfile)
|
2544 |
error("could not open '%s'", outfilename);
|
2545 |
|
2546 |
load_object(filename); |
2547 |
gen_file(outfile, out_type); |
2548 |
fclose(outfile); |
2549 |
return 0; |
2550 |
} |