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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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* 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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#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_AMD64)
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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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#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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} |
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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++) { |
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sec = &shdr[i]; |
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if (!sec->sh_name)
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continue;
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shname = shstr + sec->sh_name; |
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if (!strcmp(shname, name))
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return sec;
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} |
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return NULL; |
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} |
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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++) { |
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sec = &shdr[i]; |
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if (sec->sh_type == SHT_RELOC && sec->sh_info == sh_index)
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return i;
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} |
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return 0; |
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} |
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static char *get_rel_sym_name(EXE_RELOC *rel) |
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{ |
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return strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
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} |
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static char *get_sym_name(EXE_SYM *sym) |
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{ |
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return strtab + sym->st_name;
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} |
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/* load an elf object file */
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int load_object(const char *filename) |
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{ |
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int fd;
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struct elf_shdr *sec, *symtab_sec, *strtab_sec, *text_sec;
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int i, j;
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ElfW(Sym) *sym; |
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char *shstr;
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ELF_RELOC *rel; |
421 |
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fd = open(filename, O_RDONLY); |
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if (fd < 0) |
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error("can't open file '%s'", filename);
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/* Read ELF header. */
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if (read(fd, &ehdr, sizeof (ehdr)) != sizeof (ehdr)) |
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error("unable to read file header");
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/* Check ELF identification. */
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if (ehdr.e_ident[EI_MAG0] != ELFMAG0
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|| ehdr.e_ident[EI_MAG1] != ELFMAG1 |
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|| ehdr.e_ident[EI_MAG2] != ELFMAG2 |
434 |
|| ehdr.e_ident[EI_MAG3] != ELFMAG3 |
435 |
|| ehdr.e_ident[EI_VERSION] != EV_CURRENT) { |
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error("bad ELF header");
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} |
438 |
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do_swap = elf_must_swap(&ehdr); |
440 |
if (do_swap)
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elf_swap_ehdr(&ehdr); |
442 |
if (ehdr.e_ident[EI_CLASS] != ELF_CLASS)
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error("Unsupported ELF class");
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if (ehdr.e_type != ET_REL)
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error("ELF object file expected");
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if (ehdr.e_version != EV_CURRENT)
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error("Invalid ELF version");
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if (!elf_check_arch(ehdr.e_machine))
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error("Unsupported CPU (e_machine=%d)", ehdr.e_machine);
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450 |
|
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/* read section headers */
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shdr = load_data(fd, ehdr.e_shoff, ehdr.e_shnum * sizeof(struct elf_shdr)); |
453 |
if (do_swap) {
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for(i = 0; i < ehdr.e_shnum; i++) { |
455 |
elf_swap_shdr(&shdr[i]); |
456 |
} |
457 |
} |
458 |
|
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/* read all section data */
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sdata = malloc(sizeof(void *) * ehdr.e_shnum); |
461 |
memset(sdata, 0, sizeof(void *) * ehdr.e_shnum); |
462 |
|
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for(i = 0;i < ehdr.e_shnum; i++) { |
464 |
sec = &shdr[i]; |
465 |
if (sec->sh_type != SHT_NOBITS)
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sdata[i] = load_data(fd, sec->sh_offset, sec->sh_size); |
467 |
} |
468 |
|
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sec = &shdr[ehdr.e_shstrndx]; |
470 |
shstr = sdata[ehdr.e_shstrndx]; |
471 |
|
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/* swap relocations */
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for(i = 0; i < ehdr.e_shnum; i++) { |
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sec = &shdr[i]; |
475 |
if (sec->sh_type == SHT_RELOC) {
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nb_relocs = sec->sh_size / sec->sh_entsize; |
477 |
if (do_swap) {
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for(j = 0, rel = (ELF_RELOC *)sdata[i]; j < nb_relocs; j++, rel++) |
479 |
elf_swap_rel(rel); |
480 |
} |
481 |
} |
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} |
483 |
/* text section */
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text_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".text");
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if (!text_sec)
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error("could not find .text section");
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text_shndx = text_sec - shdr; |
489 |
text = sdata[text_shndx]; |
490 |
|
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/* find text relocations, if any */
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relocs = NULL;
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nb_relocs = 0;
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i = find_reloc(text_shndx); |
495 |
if (i != 0) { |
496 |
relocs = (ELF_RELOC *)sdata[i]; |
497 |
nb_relocs = shdr[i].sh_size / shdr[i].sh_entsize; |
498 |
} |
499 |
|
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symtab_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".symtab");
|
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if (!symtab_sec)
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error("could not find .symtab section");
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strtab_sec = &shdr[symtab_sec->sh_link]; |
504 |
|
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symtab = (ElfW(Sym) *)sdata[symtab_sec - shdr]; |
506 |
strtab = sdata[symtab_sec->sh_link]; |
507 |
|
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nb_syms = symtab_sec->sh_size / sizeof(ElfW(Sym));
|
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if (do_swap) {
|
510 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
511 |
swab32s(&sym->st_name); |
512 |
swabls(&sym->st_value); |
513 |
swabls(&sym->st_size); |
514 |
swab16s(&sym->st_shndx); |
515 |
} |
516 |
} |
517 |
close(fd); |
518 |
return 0; |
519 |
} |
520 |
|
521 |
#endif /* CONFIG_FORMAT_ELF */ |
522 |
|
523 |
#ifdef CONFIG_FORMAT_COFF
|
524 |
|
525 |
/* COFF file info */
|
526 |
struct external_scnhdr *shdr;
|
527 |
uint8_t **sdata; |
528 |
struct external_filehdr fhdr;
|
529 |
struct external_syment *coff_symtab;
|
530 |
char *strtab;
|
531 |
int coff_text_shndx, coff_data_shndx;
|
532 |
|
533 |
int data_shndx;
|
534 |
|
535 |
#define STRTAB_SIZE 4 |
536 |
|
537 |
#define DIR32 0x06 |
538 |
#define DISP32 0x14 |
539 |
|
540 |
#define T_FUNCTION 0x20 |
541 |
#define C_EXTERNAL 2 |
542 |
|
543 |
void sym_ent_name(struct external_syment *ext_sym, EXE_SYM *sym) |
544 |
{ |
545 |
char *q;
|
546 |
int c, i, len;
|
547 |
|
548 |
if (ext_sym->e.e.e_zeroes != 0) { |
549 |
q = sym->st_name; |
550 |
for(i = 0; i < 8; i++) { |
551 |
c = ext_sym->e.e_name[i]; |
552 |
if (c == '\0') |
553 |
break;
|
554 |
*q++ = c; |
555 |
} |
556 |
*q = '\0';
|
557 |
} else {
|
558 |
pstrcpy(sym->st_name, sizeof(sym->st_name), strtab + ext_sym->e.e.e_offset);
|
559 |
} |
560 |
|
561 |
/* now convert the name to a C name (suppress the leading '_') */
|
562 |
if (sym->st_name[0] == '_') { |
563 |
len = strlen(sym->st_name); |
564 |
memmove(sym->st_name, sym->st_name + 1, len - 1); |
565 |
sym->st_name[len - 1] = '\0'; |
566 |
} |
567 |
} |
568 |
|
569 |
char *name_for_dotdata(struct coff_rel *rel) |
570 |
{ |
571 |
int i;
|
572 |
struct coff_sym *sym;
|
573 |
uint32_t text_data; |
574 |
|
575 |
text_data = *(uint32_t *)(text + rel->r_offset); |
576 |
|
577 |
for (i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
578 |
if (sym->st_syment->e_scnum == data_shndx &&
|
579 |
text_data >= sym->st_value && |
580 |
text_data < sym->st_value + sym->st_size) { |
581 |
|
582 |
return sym->st_name;
|
583 |
|
584 |
} |
585 |
} |
586 |
return NULL; |
587 |
} |
588 |
|
589 |
static char *get_sym_name(EXE_SYM *sym) |
590 |
{ |
591 |
return sym->st_name;
|
592 |
} |
593 |
|
594 |
static char *get_rel_sym_name(EXE_RELOC *rel) |
595 |
{ |
596 |
char *name;
|
597 |
name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx)); |
598 |
if (!strcmp(name, ".data")) |
599 |
name = name_for_dotdata(rel); |
600 |
return name;
|
601 |
} |
602 |
|
603 |
struct external_scnhdr *find_coff_section(struct external_scnhdr *shdr, int shnum, const char *name) |
604 |
{ |
605 |
int i;
|
606 |
const char *shname; |
607 |
struct external_scnhdr *sec;
|
608 |
|
609 |
for(i = 0; i < shnum; i++) { |
610 |
sec = &shdr[i]; |
611 |
if (!sec->s_name)
|
612 |
continue;
|
613 |
shname = sec->s_name; |
614 |
if (!strcmp(shname, name))
|
615 |
return sec;
|
616 |
} |
617 |
return NULL; |
618 |
} |
619 |
|
620 |
/* load a coff object file */
|
621 |
int load_object(const char *filename) |
622 |
{ |
623 |
int fd;
|
624 |
struct external_scnhdr *sec, *text_sec, *data_sec;
|
625 |
int i;
|
626 |
struct external_syment *ext_sym;
|
627 |
struct external_reloc *coff_relocs;
|
628 |
struct external_reloc *ext_rel;
|
629 |
uint32_t *n_strtab; |
630 |
EXE_SYM *sym; |
631 |
EXE_RELOC *rel; |
632 |
|
633 |
fd = open(filename, O_RDONLY |
634 |
#ifdef _WIN32
|
635 |
| O_BINARY |
636 |
#endif
|
637 |
); |
638 |
if (fd < 0) |
639 |
error("can't open file '%s'", filename);
|
640 |
|
641 |
/* Read COFF header. */
|
642 |
if (read(fd, &fhdr, sizeof (fhdr)) != sizeof (fhdr)) |
643 |
error("unable to read file header");
|
644 |
|
645 |
/* Check COFF identification. */
|
646 |
if (fhdr.f_magic != I386MAGIC) {
|
647 |
error("bad COFF header");
|
648 |
} |
649 |
do_swap = 0;
|
650 |
|
651 |
/* read section headers */
|
652 |
shdr = load_data(fd, sizeof(struct external_filehdr) + fhdr.f_opthdr, fhdr.f_nscns * sizeof(struct external_scnhdr)); |
653 |
|
654 |
/* read all section data */
|
655 |
sdata = malloc(sizeof(void *) * fhdr.f_nscns); |
656 |
memset(sdata, 0, sizeof(void *) * fhdr.f_nscns); |
657 |
|
658 |
const char *p; |
659 |
for(i = 0;i < fhdr.f_nscns; i++) { |
660 |
sec = &shdr[i]; |
661 |
if (!strstart(sec->s_name, ".bss", &p)) |
662 |
sdata[i] = load_data(fd, sec->s_scnptr, sec->s_size); |
663 |
} |
664 |
|
665 |
|
666 |
/* text section */
|
667 |
text_sec = find_coff_section(shdr, fhdr.f_nscns, ".text");
|
668 |
if (!text_sec)
|
669 |
error("could not find .text section");
|
670 |
coff_text_shndx = text_sec - shdr; |
671 |
text = sdata[coff_text_shndx]; |
672 |
|
673 |
/* data section */
|
674 |
data_sec = find_coff_section(shdr, fhdr.f_nscns, ".data");
|
675 |
if (!data_sec)
|
676 |
error("could not find .data section");
|
677 |
coff_data_shndx = data_sec - shdr; |
678 |
|
679 |
coff_symtab = load_data(fd, fhdr.f_symptr, fhdr.f_nsyms*SYMESZ); |
680 |
for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) { |
681 |
for(i=0;i<8;i++) |
682 |
printf(" %02x", ((uint8_t *)ext_sym->e.e_name)[i]);
|
683 |
printf("\n");
|
684 |
} |
685 |
|
686 |
|
687 |
n_strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), STRTAB_SIZE); |
688 |
strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), *n_strtab); |
689 |
|
690 |
nb_syms = fhdr.f_nsyms; |
691 |
|
692 |
for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) { |
693 |
if (strstart(ext_sym->e.e_name, ".text", NULL)) |
694 |
text_shndx = ext_sym->e_scnum; |
695 |
if (strstart(ext_sym->e.e_name, ".data", NULL)) |
696 |
data_shndx = ext_sym->e_scnum; |
697 |
} |
698 |
|
699 |
/* set coff symbol */
|
700 |
symtab = malloc(sizeof(struct coff_sym) * nb_syms); |
701 |
|
702 |
int aux_size, j;
|
703 |
for (i = 0, ext_sym = coff_symtab, sym = symtab; i < nb_syms; i++, ext_sym++, sym++) { |
704 |
memset(sym, 0, sizeof(*sym)); |
705 |
sym->st_syment = ext_sym; |
706 |
sym_ent_name(ext_sym, sym); |
707 |
sym->st_value = ext_sym->e_value; |
708 |
|
709 |
aux_size = *(int8_t *)ext_sym->e_numaux; |
710 |
if (ext_sym->e_scnum == text_shndx && ext_sym->e_type == T_FUNCTION) {
|
711 |
for (j = aux_size + 1; j < nb_syms - i; j++) { |
712 |
if ((ext_sym + j)->e_scnum == text_shndx &&
|
713 |
(ext_sym + j)->e_type == T_FUNCTION ){ |
714 |
sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value; |
715 |
break;
|
716 |
} else if (j == nb_syms - i - 1) { |
717 |
sec = &shdr[coff_text_shndx]; |
718 |
sym->st_size = sec->s_size - ext_sym->e_value; |
719 |
break;
|
720 |
} |
721 |
} |
722 |
} else if (ext_sym->e_scnum == data_shndx && *(uint8_t *)ext_sym->e_sclass == C_EXTERNAL) { |
723 |
for (j = aux_size + 1; j < nb_syms - i; j++) { |
724 |
if ((ext_sym + j)->e_scnum == data_shndx) {
|
725 |
sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value; |
726 |
break;
|
727 |
} else if (j == nb_syms - i - 1) { |
728 |
sec = &shdr[coff_data_shndx]; |
729 |
sym->st_size = sec->s_size - ext_sym->e_value; |
730 |
break;
|
731 |
} |
732 |
} |
733 |
} else {
|
734 |
sym->st_size = 0;
|
735 |
} |
736 |
|
737 |
sym->st_type = ext_sym->e_type; |
738 |
sym->st_shndx = ext_sym->e_scnum; |
739 |
} |
740 |
|
741 |
|
742 |
/* find text relocations, if any */
|
743 |
sec = &shdr[coff_text_shndx]; |
744 |
coff_relocs = load_data(fd, sec->s_relptr, sec->s_nreloc*RELSZ); |
745 |
nb_relocs = sec->s_nreloc; |
746 |
|
747 |
/* set coff relocation */
|
748 |
relocs = malloc(sizeof(struct coff_rel) * nb_relocs); |
749 |
for (i = 0, ext_rel = coff_relocs, rel = relocs; i < nb_relocs; |
750 |
i++, ext_rel++, rel++) { |
751 |
memset(rel, 0, sizeof(*rel)); |
752 |
rel->r_reloc = ext_rel; |
753 |
rel->r_offset = *(uint32_t *)ext_rel->r_vaddr; |
754 |
rel->r_type = *(uint16_t *)ext_rel->r_type; |
755 |
} |
756 |
return 0; |
757 |
} |
758 |
|
759 |
#endif /* CONFIG_FORMAT_COFF */ |
760 |
|
761 |
#ifdef HOST_ARM
|
762 |
|
763 |
int arm_emit_ldr_info(const char *name, unsigned long start_offset, |
764 |
FILE *outfile, uint8_t *p_start, uint8_t *p_end, |
765 |
ELF_RELOC *relocs, int nb_relocs)
|
766 |
{ |
767 |
uint8_t *p; |
768 |
uint32_t insn; |
769 |
int offset, min_offset, pc_offset, data_size;
|
770 |
uint8_t data_allocated[1024];
|
771 |
unsigned int data_index; |
772 |
|
773 |
memset(data_allocated, 0, sizeof(data_allocated)); |
774 |
|
775 |
p = p_start; |
776 |
min_offset = p_end - p_start; |
777 |
while (p < p_start + min_offset) {
|
778 |
insn = get32((uint32_t *)p); |
779 |
if ((insn & 0x0d5f0000) == 0x051f0000) { |
780 |
/* ldr reg, [pc, #im] */
|
781 |
offset = insn & 0xfff;
|
782 |
if (!(insn & 0x00800000)) |
783 |
offset = -offset; |
784 |
if ((offset & 3) !=0) |
785 |
error("%s:%04x: ldr pc offset must be 32 bit aligned",
|
786 |
name, start_offset + p - p_start); |
787 |
pc_offset = p - p_start + offset + 8;
|
788 |
if (pc_offset <= (p - p_start) ||
|
789 |
pc_offset >= (p_end - p_start)) |
790 |
error("%s:%04x: ldr pc offset must point inside the function code",
|
791 |
name, start_offset + p - p_start); |
792 |
if (pc_offset < min_offset)
|
793 |
min_offset = pc_offset; |
794 |
if (outfile) {
|
795 |
/* ldr position */
|
796 |
fprintf(outfile, " arm_ldr_ptr->ptr = gen_code_ptr + %d;\n",
|
797 |
p - p_start); |
798 |
/* ldr data index */
|
799 |
data_index = ((p_end - p_start) - pc_offset - 4) >> 2; |
800 |
fprintf(outfile, " arm_ldr_ptr->data_ptr = arm_data_ptr + %d;\n",
|
801 |
data_index); |
802 |
fprintf(outfile, " arm_ldr_ptr++;\n");
|
803 |
if (data_index >= sizeof(data_allocated)) |
804 |
error("%s: too many data", name);
|
805 |
if (!data_allocated[data_index]) {
|
806 |
ELF_RELOC *rel; |
807 |
int i, addend, type;
|
808 |
const char *sym_name, *p; |
809 |
char relname[1024]; |
810 |
|
811 |
data_allocated[data_index] = 1;
|
812 |
|
813 |
/* data value */
|
814 |
addend = get32((uint32_t *)(p_start + pc_offset)); |
815 |
relname[0] = '\0'; |
816 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
817 |
if (rel->r_offset == (pc_offset + start_offset)) {
|
818 |
sym_name = get_rel_sym_name(rel); |
819 |
/* the compiler leave some unnecessary references to the code */
|
820 |
if (strstart(sym_name, "__op_param", &p)) { |
821 |
snprintf(relname, sizeof(relname), "param%s", p); |
822 |
} else {
|
823 |
snprintf(relname, sizeof(relname), "(long)(&%s)", sym_name); |
824 |
} |
825 |
type = ELF32_R_TYPE(rel->r_info); |
826 |
if (type != R_ARM_ABS32)
|
827 |
error("%s: unsupported data relocation", name);
|
828 |
break;
|
829 |
} |
830 |
} |
831 |
fprintf(outfile, " arm_data_ptr[%d] = 0x%x",
|
832 |
data_index, addend); |
833 |
if (relname[0] != '\0') |
834 |
fprintf(outfile, " + %s", relname);
|
835 |
fprintf(outfile, ";\n");
|
836 |
} |
837 |
} |
838 |
} |
839 |
p += 4;
|
840 |
} |
841 |
data_size = (p_end - p_start) - min_offset; |
842 |
if (data_size > 0 && outfile) { |
843 |
fprintf(outfile, " arm_data_ptr += %d;\n", data_size >> 2); |
844 |
} |
845 |
|
846 |
/* the last instruction must be a mov pc, lr */
|
847 |
if (p == p_start)
|
848 |
goto arm_ret_error;
|
849 |
p -= 4;
|
850 |
insn = get32((uint32_t *)p); |
851 |
if ((insn & 0xffff0000) != 0xe91b0000) { |
852 |
arm_ret_error:
|
853 |
if (!outfile)
|
854 |
printf("%s: invalid epilog\n", name);
|
855 |
} |
856 |
return p - p_start;
|
857 |
} |
858 |
#endif
|
859 |
|
860 |
|
861 |
#define MAX_ARGS 3 |
862 |
|
863 |
/* generate op code */
|
864 |
void gen_code(const char *name, host_ulong offset, host_ulong size, |
865 |
FILE *outfile, int gen_switch)
|
866 |
{ |
867 |
int copy_size = 0; |
868 |
uint8_t *p_start, *p_end; |
869 |
host_ulong start_offset; |
870 |
int nb_args, i, n;
|
871 |
uint8_t args_present[MAX_ARGS]; |
872 |
const char *sym_name, *p; |
873 |
EXE_RELOC *rel; |
874 |
|
875 |
/* Compute exact size excluding prologue and epilogue instructions.
|
876 |
* Increment start_offset to skip epilogue instructions, then compute
|
877 |
* copy_size the indicate the size of the remaining instructions (in
|
878 |
* bytes).
|
879 |
*/
|
880 |
p_start = text + offset; |
881 |
p_end = p_start + size; |
882 |
start_offset = offset; |
883 |
#if defined(HOST_I386) || defined(HOST_AMD64)
|
884 |
#ifdef CONFIG_FORMAT_COFF
|
885 |
{ |
886 |
uint8_t *p; |
887 |
p = p_end - 1;
|
888 |
if (p == p_start)
|
889 |
error("empty code for %s", name);
|
890 |
while (*p != 0xc3) { |
891 |
p--; |
892 |
if (p <= p_start)
|
893 |
error("ret or jmp expected at the end of %s", name);
|
894 |
} |
895 |
copy_size = p - p_start; |
896 |
} |
897 |
#else
|
898 |
{ |
899 |
int len;
|
900 |
len = p_end - p_start; |
901 |
if (len == 0) |
902 |
error("empty code for %s", name);
|
903 |
if (p_end[-1] == 0xc3) { |
904 |
len--; |
905 |
} else {
|
906 |
error("ret or jmp expected at the end of %s", name);
|
907 |
} |
908 |
copy_size = len; |
909 |
} |
910 |
#endif
|
911 |
#elif defined(HOST_PPC)
|
912 |
{ |
913 |
uint8_t *p; |
914 |
p = (void *)(p_end - 4); |
915 |
if (p == p_start)
|
916 |
error("empty code for %s", name);
|
917 |
if (get32((uint32_t *)p) != 0x4e800020) |
918 |
error("blr expected at the end of %s", name);
|
919 |
copy_size = p - p_start; |
920 |
} |
921 |
#elif defined(HOST_S390)
|
922 |
{ |
923 |
uint8_t *p; |
924 |
p = (void *)(p_end - 2); |
925 |
if (p == p_start)
|
926 |
error("empty code for %s", name);
|
927 |
if (get16((uint16_t *)p) != 0x07fe && get16((uint16_t *)p) != 0x07f4) |
928 |
error("br %%r14 expected at the end of %s", name);
|
929 |
copy_size = p - p_start; |
930 |
} |
931 |
#elif defined(HOST_ALPHA)
|
932 |
{ |
933 |
uint8_t *p; |
934 |
p = p_end - 4;
|
935 |
#if 0
|
936 |
/* XXX: check why it occurs */
|
937 |
if (p == p_start)
|
938 |
error("empty code for %s", name);
|
939 |
#endif
|
940 |
if (get32((uint32_t *)p) != 0x6bfa8001) |
941 |
error("ret expected at the end of %s", name);
|
942 |
copy_size = p - p_start; |
943 |
} |
944 |
#elif defined(HOST_IA64)
|
945 |
{ |
946 |
uint8_t *p; |
947 |
p = (void *)(p_end - 4); |
948 |
if (p == p_start)
|
949 |
error("empty code for %s", name);
|
950 |
/* br.ret.sptk.many b0;; */
|
951 |
/* 08 00 84 00 */
|
952 |
if (get32((uint32_t *)p) != 0x00840008) |
953 |
error("br.ret.sptk.many b0;; expected at the end of %s", name);
|
954 |
copy_size = p - p_start; |
955 |
} |
956 |
#elif defined(HOST_SPARC)
|
957 |
{ |
958 |
uint32_t start_insn, end_insn1, end_insn2; |
959 |
uint8_t *p; |
960 |
p = (void *)(p_end - 8); |
961 |
if (p <= p_start)
|
962 |
error("empty code for %s", name);
|
963 |
start_insn = get32((uint32_t *)(p_start + 0x0));
|
964 |
end_insn1 = get32((uint32_t *)(p + 0x0));
|
965 |
end_insn2 = get32((uint32_t *)(p + 0x4));
|
966 |
if ((start_insn & ~0x1fff) == 0x9de3a000) { |
967 |
p_start += 0x4;
|
968 |
start_offset += 0x4;
|
969 |
if ((int)(start_insn | ~0x1fff) < -128) |
970 |
error("Found bogus save at the start of %s", name);
|
971 |
if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000) |
972 |
error("ret; restore; not found at end of %s", name);
|
973 |
} else {
|
974 |
error("No save at the beginning of %s", name);
|
975 |
} |
976 |
#if 0
|
977 |
/* Skip a preceeding nop, if present. */
|
978 |
if (p > p_start) {
|
979 |
skip_insn = get32((uint32_t *)(p - 0x4));
|
980 |
if (skip_insn == 0x01000000)
|
981 |
p -= 4;
|
982 |
}
|
983 |
#endif
|
984 |
copy_size = p - p_start; |
985 |
} |
986 |
#elif defined(HOST_SPARC64)
|
987 |
{ |
988 |
uint32_t start_insn, end_insn1, end_insn2, skip_insn; |
989 |
uint8_t *p; |
990 |
p = (void *)(p_end - 8); |
991 |
if (p <= p_start)
|
992 |
error("empty code for %s", name);
|
993 |
start_insn = get32((uint32_t *)(p_start + 0x0));
|
994 |
end_insn1 = get32((uint32_t *)(p + 0x0));
|
995 |
end_insn2 = get32((uint32_t *)(p + 0x4));
|
996 |
if ((start_insn & ~0x1fff) == 0x9de3a000) { |
997 |
p_start += 0x4;
|
998 |
start_offset += 0x4;
|
999 |
if ((int)(start_insn | ~0x1fff) < -256) |
1000 |
error("Found bogus save at the start of %s", name);
|
1001 |
if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000) |
1002 |
error("ret; restore; not found at end of %s", name);
|
1003 |
} else {
|
1004 |
error("No save at the beginning of %s", name);
|
1005 |
} |
1006 |
|
1007 |
/* Skip a preceeding nop, if present. */
|
1008 |
if (p > p_start) {
|
1009 |
skip_insn = get32((uint32_t *)(p - 0x4));
|
1010 |
if (skip_insn == 0x01000000) |
1011 |
p -= 4;
|
1012 |
} |
1013 |
|
1014 |
copy_size = p - p_start; |
1015 |
} |
1016 |
#elif defined(HOST_ARM)
|
1017 |
{ |
1018 |
if ((p_end - p_start) <= 16) |
1019 |
error("%s: function too small", name);
|
1020 |
if (get32((uint32_t *)p_start) != 0xe1a0c00d || |
1021 |
(get32((uint32_t *)(p_start + 4)) & 0xffff0000) != 0xe92d0000 || |
1022 |
get32((uint32_t *)(p_start + 8)) != 0xe24cb004) |
1023 |
error("%s: invalid prolog", name);
|
1024 |
p_start += 12;
|
1025 |
start_offset += 12;
|
1026 |
copy_size = arm_emit_ldr_info(name, start_offset, NULL, p_start, p_end,
|
1027 |
relocs, nb_relocs); |
1028 |
} |
1029 |
#elif defined(HOST_M68K)
|
1030 |
{ |
1031 |
uint8_t *p; |
1032 |
p = (void *)(p_end - 2); |
1033 |
if (p == p_start)
|
1034 |
error("empty code for %s", name);
|
1035 |
// remove NOP's, probably added for alignment
|
1036 |
while ((get16((uint16_t *)p) == 0x4e71) && |
1037 |
(p>p_start)) |
1038 |
p -= 2;
|
1039 |
if (get16((uint16_t *)p) != 0x4e75) |
1040 |
error("rts expected at the end of %s", name);
|
1041 |
copy_size = p - p_start; |
1042 |
} |
1043 |
#else
|
1044 |
#error unsupported CPU
|
1045 |
#endif
|
1046 |
|
1047 |
/* compute the number of arguments by looking at the relocations */
|
1048 |
for(i = 0;i < MAX_ARGS; i++) |
1049 |
args_present[i] = 0;
|
1050 |
|
1051 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1052 |
if (rel->r_offset >= start_offset &&
|
1053 |
rel->r_offset < start_offset + (p_end - p_start)) { |
1054 |
sym_name = get_rel_sym_name(rel); |
1055 |
if (strstart(sym_name, "__op_param", &p)) { |
1056 |
n = strtoul(p, NULL, 10); |
1057 |
if (n > MAX_ARGS)
|
1058 |
error("too many arguments in %s", name);
|
1059 |
args_present[n - 1] = 1; |
1060 |
} |
1061 |
} |
1062 |
} |
1063 |
|
1064 |
nb_args = 0;
|
1065 |
while (nb_args < MAX_ARGS && args_present[nb_args])
|
1066 |
nb_args++; |
1067 |
for(i = nb_args; i < MAX_ARGS; i++) {
|
1068 |
if (args_present[i])
|
1069 |
error("inconsistent argument numbering in %s", name);
|
1070 |
} |
1071 |
|
1072 |
if (gen_switch == 2) { |
1073 |
fprintf(outfile, "DEF(%s, %d, %d)\n", name + 3, nb_args, copy_size); |
1074 |
} else if (gen_switch == 1) { |
1075 |
|
1076 |
/* output C code */
|
1077 |
fprintf(outfile, "case INDEX_%s: {\n", name);
|
1078 |
if (nb_args > 0) { |
1079 |
fprintf(outfile, " long ");
|
1080 |
for(i = 0; i < nb_args; i++) { |
1081 |
if (i != 0) |
1082 |
fprintf(outfile, ", ");
|
1083 |
fprintf(outfile, "param%d", i + 1); |
1084 |
} |
1085 |
fprintf(outfile, ";\n");
|
1086 |
} |
1087 |
fprintf(outfile, " extern void %s();\n", name);
|
1088 |
|
1089 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1090 |
if (rel->r_offset >= start_offset &&
|
1091 |
rel->r_offset < start_offset + (p_end - p_start)) { |
1092 |
sym_name = get_rel_sym_name(rel); |
1093 |
if (*sym_name &&
|
1094 |
!strstart(sym_name, "__op_param", NULL) && |
1095 |
!strstart(sym_name, "__op_jmp", NULL)) { |
1096 |
#if defined(HOST_SPARC)
|
1097 |
if (sym_name[0] == '.') { |
1098 |
fprintf(outfile, |
1099 |
"extern char __dot_%s __asm__(\"%s\");\n",
|
1100 |
sym_name+1, sym_name);
|
1101 |
continue;
|
1102 |
} |
1103 |
#endif
|
1104 |
fprintf(outfile, "extern char %s;\n", sym_name);
|
1105 |
} |
1106 |
} |
1107 |
} |
1108 |
|
1109 |
fprintf(outfile, " memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n", name, start_offset - offset, copy_size);
|
1110 |
|
1111 |
/* emit code offset information */
|
1112 |
{ |
1113 |
EXE_SYM *sym; |
1114 |
const char *sym_name, *p; |
1115 |
unsigned long val; |
1116 |
int n;
|
1117 |
|
1118 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
1119 |
sym_name = get_sym_name(sym); |
1120 |
if (strstart(sym_name, "__op_label", &p)) { |
1121 |
uint8_t *ptr; |
1122 |
unsigned long offset; |
1123 |
|
1124 |
/* test if the variable refers to a label inside
|
1125 |
the code we are generating */
|
1126 |
#ifdef CONFIG_FORMAT_COFF
|
1127 |
if (sym->st_shndx == text_shndx) {
|
1128 |
ptr = sdata[coff_text_shndx]; |
1129 |
} else if (sym->st_shndx == data_shndx) { |
1130 |
ptr = sdata[coff_data_shndx]; |
1131 |
} else {
|
1132 |
ptr = NULL;
|
1133 |
} |
1134 |
#else
|
1135 |
ptr = sdata[sym->st_shndx]; |
1136 |
#endif
|
1137 |
if (!ptr)
|
1138 |
error("__op_labelN in invalid section");
|
1139 |
offset = sym->st_value; |
1140 |
val = *(unsigned long *)(ptr + offset); |
1141 |
#ifdef ELF_USES_RELOCA
|
1142 |
{ |
1143 |
int reloc_shndx, nb_relocs1, j;
|
1144 |
|
1145 |
/* try to find a matching relocation */
|
1146 |
reloc_shndx = find_reloc(sym->st_shndx); |
1147 |
if (reloc_shndx) {
|
1148 |
nb_relocs1 = shdr[reloc_shndx].sh_size / |
1149 |
shdr[reloc_shndx].sh_entsize; |
1150 |
rel = (ELF_RELOC *)sdata[reloc_shndx]; |
1151 |
for(j = 0; j < nb_relocs1; j++) { |
1152 |
if (rel->r_offset == offset) {
|
1153 |
val = rel->r_addend; |
1154 |
break;
|
1155 |
} |
1156 |
rel++; |
1157 |
} |
1158 |
} |
1159 |
} |
1160 |
#endif
|
1161 |
|
1162 |
if (val >= start_offset && val < start_offset + copy_size) {
|
1163 |
n = strtol(p, NULL, 10); |
1164 |
fprintf(outfile, " label_offsets[%d] = %ld + (gen_code_ptr - gen_code_buf);\n", n, val - start_offset);
|
1165 |
} |
1166 |
} |
1167 |
} |
1168 |
} |
1169 |
|
1170 |
/* load parameres in variables */
|
1171 |
for(i = 0; i < nb_args; i++) { |
1172 |
fprintf(outfile, " param%d = *opparam_ptr++;\n", i + 1); |
1173 |
} |
1174 |
|
1175 |
/* patch relocations */
|
1176 |
#if defined(HOST_I386)
|
1177 |
{ |
1178 |
char name[256]; |
1179 |
int type;
|
1180 |
int addend;
|
1181 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1182 |
if (rel->r_offset >= start_offset &&
|
1183 |
rel->r_offset < start_offset + copy_size) { |
1184 |
sym_name = get_rel_sym_name(rel); |
1185 |
if (strstart(sym_name, "__op_jmp", &p)) { |
1186 |
int n;
|
1187 |
n = strtol(p, NULL, 10); |
1188 |
/* __op_jmp relocations are done at
|
1189 |
runtime to do translated block
|
1190 |
chaining: the offset of the instruction
|
1191 |
needs to be stored */
|
1192 |
fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
|
1193 |
n, rel->r_offset - start_offset); |
1194 |
continue;
|
1195 |
} |
1196 |
|
1197 |
if (strstart(sym_name, "__op_param", &p)) { |
1198 |
snprintf(name, sizeof(name), "param%s", p); |
1199 |
} else {
|
1200 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
1201 |
} |
1202 |
addend = get32((uint32_t *)(text + rel->r_offset)); |
1203 |
#ifdef CONFIG_FORMAT_ELF
|
1204 |
type = ELF32_R_TYPE(rel->r_info); |
1205 |
switch(type) {
|
1206 |
case R_386_32:
|
1207 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
1208 |
rel->r_offset - start_offset, name, addend); |
1209 |
break;
|
1210 |
case R_386_PC32:
|
1211 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
|
1212 |
rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend); |
1213 |
break;
|
1214 |
default:
|
1215 |
error("unsupported i386 relocation (%d)", type);
|
1216 |
} |
1217 |
#elif defined(CONFIG_FORMAT_COFF)
|
1218 |
{ |
1219 |
char *temp_name;
|
1220 |
int j;
|
1221 |
EXE_SYM *sym; |
1222 |
temp_name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx)); |
1223 |
if (!strcmp(temp_name, ".data")) { |
1224 |
for (j = 0, sym = symtab; j < nb_syms; j++, sym++) { |
1225 |
if (strstart(sym->st_name, sym_name, NULL)) { |
1226 |
addend -= sym->st_value; |
1227 |
} |
1228 |
} |
1229 |
} |
1230 |
} |
1231 |
type = rel->r_type; |
1232 |
switch(type) {
|
1233 |
case DIR32:
|
1234 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
1235 |
rel->r_offset - start_offset, name, addend); |
1236 |
break;
|
1237 |
case DISP32:
|
1238 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d -4;\n",
|
1239 |
rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend); |
1240 |
break;
|
1241 |
default:
|
1242 |
error("unsupported i386 relocation (%d)", type);
|
1243 |
} |
1244 |
#else
|
1245 |
#error unsupport object format
|
1246 |
#endif
|
1247 |
} |
1248 |
} |
1249 |
} |
1250 |
#elif defined(HOST_AMD64)
|
1251 |
{ |
1252 |
char name[256]; |
1253 |
int type;
|
1254 |
int addend;
|
1255 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1256 |
if (rel->r_offset >= start_offset &&
|
1257 |
rel->r_offset < start_offset + copy_size) { |
1258 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
1259 |
if (strstart(sym_name, "__op_param", &p)) { |
1260 |
snprintf(name, sizeof(name), "param%s", p); |
1261 |
} else {
|
1262 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
1263 |
} |
1264 |
type = ELF32_R_TYPE(rel->r_info); |
1265 |
addend = rel->r_addend; |
1266 |
switch(type) {
|
1267 |
case R_X86_64_32:
|
1268 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (uint32_t)%s + %d;\n",
|
1269 |
rel->r_offset - start_offset, name, addend); |
1270 |
break;
|
1271 |
case R_X86_64_32S:
|
1272 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (int32_t)%s + %d;\n",
|
1273 |
rel->r_offset - start_offset, name, addend); |
1274 |
break;
|
1275 |
case R_X86_64_PC32:
|
1276 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
|
1277 |
rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend); |
1278 |
break;
|
1279 |
default:
|
1280 |
error("unsupported AMD64 relocation (%d)", type);
|
1281 |
} |
1282 |
} |
1283 |
} |
1284 |
} |
1285 |
#elif defined(HOST_PPC)
|
1286 |
{ |
1287 |
char name[256]; |
1288 |
int type;
|
1289 |
int addend;
|
1290 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1291 |
if (rel->r_offset >= start_offset &&
|
1292 |
rel->r_offset < start_offset + copy_size) { |
1293 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
1294 |
if (strstart(sym_name, "__op_jmp", &p)) { |
1295 |
int n;
|
1296 |
n = strtol(p, NULL, 10); |
1297 |
/* __op_jmp relocations are done at
|
1298 |
runtime to do translated block
|
1299 |
chaining: the offset of the instruction
|
1300 |
needs to be stored */
|
1301 |
fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
|
1302 |
n, rel->r_offset - start_offset); |
1303 |
continue;
|
1304 |
} |
1305 |
|
1306 |
if (strstart(sym_name, "__op_param", &p)) { |
1307 |
snprintf(name, sizeof(name), "param%s", p); |
1308 |
} else {
|
1309 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
1310 |
} |
1311 |
type = ELF32_R_TYPE(rel->r_info); |
1312 |
addend = rel->r_addend; |
1313 |
switch(type) {
|
1314 |
case R_PPC_ADDR32:
|
1315 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
1316 |
rel->r_offset - start_offset, name, addend); |
1317 |
break;
|
1318 |
case R_PPC_ADDR16_LO:
|
1319 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n",
|
1320 |
rel->r_offset - start_offset, name, addend); |
1321 |
break;
|
1322 |
case R_PPC_ADDR16_HI:
|
1323 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n",
|
1324 |
rel->r_offset - start_offset, name, addend); |
1325 |
break;
|
1326 |
case R_PPC_ADDR16_HA:
|
1327 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n",
|
1328 |
rel->r_offset - start_offset, name, addend); |
1329 |
break;
|
1330 |
case R_PPC_REL24:
|
1331 |
/* warning: must be at 32 MB distancy */
|
1332 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((%s - (long)(gen_code_ptr + %d) + %d) & 0x03fffffc);\n",
|
1333 |
rel->r_offset - start_offset, rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend); |
1334 |
break;
|
1335 |
default:
|
1336 |
error("unsupported powerpc relocation (%d)", type);
|
1337 |
} |
1338 |
} |
1339 |
} |
1340 |
} |
1341 |
#elif defined(HOST_S390)
|
1342 |
{ |
1343 |
char name[256]; |
1344 |
int type;
|
1345 |
int addend;
|
1346 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1347 |
if (rel->r_offset >= start_offset &&
|
1348 |
rel->r_offset < start_offset + copy_size) { |
1349 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
1350 |
if (strstart(sym_name, "__op_param", &p)) { |
1351 |
snprintf(name, sizeof(name), "param%s", p); |
1352 |
} else {
|
1353 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
1354 |
} |
1355 |
type = ELF32_R_TYPE(rel->r_info); |
1356 |
addend = rel->r_addend; |
1357 |
switch(type) {
|
1358 |
case R_390_32:
|
1359 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
1360 |
rel->r_offset - start_offset, name, addend); |
1361 |
break;
|
1362 |
case R_390_16:
|
1363 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
1364 |
rel->r_offset - start_offset, name, addend); |
1365 |
break;
|
1366 |
case R_390_8:
|
1367 |
fprintf(outfile, " *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
1368 |
rel->r_offset - start_offset, name, addend); |
1369 |
break;
|
1370 |
default:
|
1371 |
error("unsupported s390 relocation (%d)", type);
|
1372 |
} |
1373 |
} |
1374 |
} |
1375 |
} |
1376 |
#elif defined(HOST_ALPHA)
|
1377 |
{ |
1378 |
for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) { |
1379 |
if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
|
1380 |
int type;
|
1381 |
|
1382 |
type = ELF64_R_TYPE(rel->r_info); |
1383 |
sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name; |
1384 |
switch (type) {
|
1385 |
case R_ALPHA_GPDISP:
|
1386 |
/* The gp is just 32 bit, and never changes, so it's easiest to emit it
|
1387 |
as an immediate instead of constructing it from the pv or ra. */
|
1388 |
fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, gp);\n",
|
1389 |
rel->r_offset - start_offset); |
1390 |
fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, gp);\n",
|
1391 |
rel->r_offset - start_offset + rel->r_addend); |
1392 |
break;
|
1393 |
case R_ALPHA_LITUSE:
|
1394 |
/* jsr to literal hint. Could be used to optimize to bsr. Ignore for
|
1395 |
now, since some called functions (libc) need pv to be set up. */
|
1396 |
break;
|
1397 |
case R_ALPHA_HINT:
|
1398 |
/* Branch target prediction hint. Ignore for now. Should be already
|
1399 |
correct for in-function jumps. */
|
1400 |
break;
|
1401 |
case R_ALPHA_LITERAL:
|
1402 |
/* Load a literal from the GOT relative to the gp. Since there's only a
|
1403 |
single gp, nothing is to be done. */
|
1404 |
break;
|
1405 |
case R_ALPHA_GPRELHIGH:
|
1406 |
/* Handle fake relocations against __op_param symbol. Need to emit the
|
1407 |
high part of the immediate value instead. Other symbols need no
|
1408 |
special treatment. */
|
1409 |
if (strstart(sym_name, "__op_param", &p)) |
1410 |
fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, param%s);\n",
|
1411 |
rel->r_offset - start_offset, p); |
1412 |
break;
|
1413 |
case R_ALPHA_GPRELLOW:
|
1414 |
if (strstart(sym_name, "__op_param", &p)) |
1415 |
fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, param%s);\n",
|
1416 |
rel->r_offset - start_offset, p); |
1417 |
break;
|
1418 |
case R_ALPHA_BRSGP:
|
1419 |
/* PC-relative jump. Tweak offset to skip the two instructions that try to
|
1420 |
set up the gp from the pv. */
|
1421 |
fprintf(outfile, " fix_bsr(gen_code_ptr + %ld, (uint8_t *) &%s - (gen_code_ptr + %ld + 4) + 8);\n",
|
1422 |
rel->r_offset - start_offset, sym_name, rel->r_offset - start_offset); |
1423 |
break;
|
1424 |
default:
|
1425 |
error("unsupported Alpha relocation (%d)", type);
|
1426 |
} |
1427 |
} |
1428 |
} |
1429 |
} |
1430 |
#elif defined(HOST_IA64)
|
1431 |
{ |
1432 |
char name[256]; |
1433 |
int type;
|
1434 |
int addend;
|
1435 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1436 |
if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
|
1437 |
sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name; |
1438 |
if (strstart(sym_name, "__op_param", &p)) { |
1439 |
snprintf(name, sizeof(name), "param%s", p); |
1440 |
} else {
|
1441 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
1442 |
} |
1443 |
type = ELF64_R_TYPE(rel->r_info); |
1444 |
addend = rel->r_addend; |
1445 |
switch(type) {
|
1446 |
case R_IA64_LTOFF22:
|
1447 |
error("must implemnt R_IA64_LTOFF22 relocation");
|
1448 |
case R_IA64_PCREL21B:
|
1449 |
error("must implemnt R_IA64_PCREL21B relocation");
|
1450 |
default:
|
1451 |
error("unsupported ia64 relocation (%d)", type);
|
1452 |
} |
1453 |
} |
1454 |
} |
1455 |
} |
1456 |
#elif defined(HOST_SPARC)
|
1457 |
{ |
1458 |
char name[256]; |
1459 |
int type;
|
1460 |
int addend;
|
1461 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1462 |
if (rel->r_offset >= start_offset &&
|
1463 |
rel->r_offset < start_offset + copy_size) { |
1464 |
sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name; |
1465 |
if (strstart(sym_name, "__op_param", &p)) { |
1466 |
snprintf(name, sizeof(name), "param%s", p); |
1467 |
} else {
|
1468 |
if (sym_name[0] == '.') |
1469 |
snprintf(name, sizeof(name),
|
1470 |
"(long)(&__dot_%s)",
|
1471 |
sym_name + 1);
|
1472 |
else
|
1473 |
snprintf(name, sizeof(name),
|
1474 |
"(long)(&%s)", sym_name);
|
1475 |
} |
1476 |
type = ELF32_R_TYPE(rel->r_info); |
1477 |
addend = rel->r_addend; |
1478 |
switch(type) {
|
1479 |
case R_SPARC_32:
|
1480 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
1481 |
rel->r_offset - start_offset, name, addend); |
1482 |
break;
|
1483 |
case R_SPARC_HI22:
|
1484 |
fprintf(outfile, |
1485 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
1486 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
1487 |
" & ~0x3fffff) "
|
1488 |
" | (((%s + %d) >> 10) & 0x3fffff);\n",
|
1489 |
rel->r_offset - start_offset, |
1490 |
rel->r_offset - start_offset, |
1491 |
name, addend); |
1492 |
break;
|
1493 |
case R_SPARC_LO10:
|
1494 |
fprintf(outfile, |
1495 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
1496 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
1497 |
" & ~0x3ff) "
|
1498 |
" | ((%s + %d) & 0x3ff);\n",
|
1499 |
rel->r_offset - start_offset, |
1500 |
rel->r_offset - start_offset, |
1501 |
name, addend); |
1502 |
break;
|
1503 |
case R_SPARC_WDISP30:
|
1504 |
fprintf(outfile, |
1505 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
1506 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
1507 |
" & ~0x3fffffff) "
|
1508 |
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
|
1509 |
" & 0x3fffffff);\n",
|
1510 |
rel->r_offset - start_offset, |
1511 |
rel->r_offset - start_offset, |
1512 |
name, addend, |
1513 |
rel->r_offset - start_offset); |
1514 |
break;
|
1515 |
default:
|
1516 |
error("unsupported sparc relocation (%d)", type);
|
1517 |
} |
1518 |
} |
1519 |
} |
1520 |
} |
1521 |
#elif defined(HOST_SPARC64)
|
1522 |
{ |
1523 |
char name[256]; |
1524 |
int type;
|
1525 |
int addend;
|
1526 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1527 |
if (rel->r_offset >= start_offset &&
|
1528 |
rel->r_offset < start_offset + copy_size) { |
1529 |
sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name; |
1530 |
if (strstart(sym_name, "__op_param", &p)) { |
1531 |
snprintf(name, sizeof(name), "param%s", p); |
1532 |
} else {
|
1533 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
1534 |
} |
1535 |
type = ELF64_R_TYPE(rel->r_info); |
1536 |
addend = rel->r_addend; |
1537 |
switch(type) {
|
1538 |
case R_SPARC_32:
|
1539 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
1540 |
rel->r_offset - start_offset, name, addend); |
1541 |
break;
|
1542 |
case R_SPARC_HI22:
|
1543 |
fprintf(outfile, |
1544 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
1545 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
1546 |
" & ~0x3fffff) "
|
1547 |
" | (((%s + %d) >> 10) & 0x3fffff);\n",
|
1548 |
rel->r_offset - start_offset, |
1549 |
rel->r_offset - start_offset, |
1550 |
name, addend); |
1551 |
break;
|
1552 |
case R_SPARC_LO10:
|
1553 |
fprintf(outfile, |
1554 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
1555 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
1556 |
" & ~0x3ff) "
|
1557 |
" | ((%s + %d) & 0x3ff);\n",
|
1558 |
rel->r_offset - start_offset, |
1559 |
rel->r_offset - start_offset, |
1560 |
name, addend); |
1561 |
break;
|
1562 |
case R_SPARC_WDISP30:
|
1563 |
fprintf(outfile, |
1564 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
1565 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
1566 |
" & ~0x3fffffff) "
|
1567 |
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
|
1568 |
" & 0x3fffffff);\n",
|
1569 |
rel->r_offset - start_offset, |
1570 |
rel->r_offset - start_offset, |
1571 |
name, addend, |
1572 |
rel->r_offset - start_offset); |
1573 |
break;
|
1574 |
default:
|
1575 |
error("unsupported sparc64 relocation (%d)", type);
|
1576 |
} |
1577 |
} |
1578 |
} |
1579 |
} |
1580 |
#elif defined(HOST_ARM)
|
1581 |
{ |
1582 |
char name[256]; |
1583 |
int type;
|
1584 |
int addend;
|
1585 |
|
1586 |
arm_emit_ldr_info(name, start_offset, outfile, p_start, p_end, |
1587 |
relocs, nb_relocs); |
1588 |
|
1589 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1590 |
if (rel->r_offset >= start_offset &&
|
1591 |
rel->r_offset < start_offset + copy_size) { |
1592 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
1593 |
/* the compiler leave some unnecessary references to the code */
|
1594 |
if (sym_name[0] == '\0') |
1595 |
continue;
|
1596 |
if (strstart(sym_name, "__op_param", &p)) { |
1597 |
snprintf(name, sizeof(name), "param%s", p); |
1598 |
} else {
|
1599 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
1600 |
} |
1601 |
type = ELF32_R_TYPE(rel->r_info); |
1602 |
addend = get32((uint32_t *)(text + rel->r_offset)); |
1603 |
switch(type) {
|
1604 |
case R_ARM_ABS32:
|
1605 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
1606 |
rel->r_offset - start_offset, name, addend); |
1607 |
break;
|
1608 |
case R_ARM_PC24:
|
1609 |
fprintf(outfile, " arm_reloc_pc24((uint32_t *)(gen_code_ptr + %d), 0x%x, %s);\n",
|
1610 |
rel->r_offset - start_offset, addend, name); |
1611 |
break;
|
1612 |
default:
|
1613 |
error("unsupported arm relocation (%d)", type);
|
1614 |
} |
1615 |
} |
1616 |
} |
1617 |
} |
1618 |
#elif defined(HOST_M68K)
|
1619 |
{ |
1620 |
char name[256]; |
1621 |
int type;
|
1622 |
int addend;
|
1623 |
Elf32_Sym *sym; |
1624 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
1625 |
if (rel->r_offset >= start_offset &&
|
1626 |
rel->r_offset < start_offset + copy_size) { |
1627 |
sym = &(symtab[ELFW(R_SYM)(rel->r_info)]); |
1628 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
1629 |
if (strstart(sym_name, "__op_param", &p)) { |
1630 |
snprintf(name, sizeof(name), "param%s", p); |
1631 |
} else {
|
1632 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
1633 |
} |
1634 |
type = ELF32_R_TYPE(rel->r_info); |
1635 |
addend = get32((uint32_t *)(text + rel->r_offset)) + rel->r_addend; |
1636 |
switch(type) {
|
1637 |
case R_68K_32:
|
1638 |
fprintf(outfile, " /* R_68K_32 RELOC, offset %x */\n", rel->r_offset) ;
|
1639 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %#x;\n",
|
1640 |
rel->r_offset - start_offset, name, addend ); |
1641 |
break;
|
1642 |
case R_68K_PC32:
|
1643 |
fprintf(outfile, " /* R_68K_PC32 RELOC, offset %x */\n", rel->r_offset);
|
1644 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %#x) + %#x;\n",
|
1645 |
rel->r_offset - start_offset, name, rel->r_offset - start_offset, /*sym->st_value+*/ addend);
|
1646 |
break;
|
1647 |
default:
|
1648 |
error("unsupported m68k relocation (%d)", type);
|
1649 |
} |
1650 |
} |
1651 |
} |
1652 |
} |
1653 |
#else
|
1654 |
#error unsupported CPU
|
1655 |
#endif
|
1656 |
fprintf(outfile, " gen_code_ptr += %d;\n", copy_size);
|
1657 |
fprintf(outfile, "}\n");
|
1658 |
fprintf(outfile, "break;\n\n");
|
1659 |
} else {
|
1660 |
fprintf(outfile, "static inline void gen_%s(", name);
|
1661 |
if (nb_args == 0) { |
1662 |
fprintf(outfile, "void");
|
1663 |
} else {
|
1664 |
for(i = 0; i < nb_args; i++) { |
1665 |
if (i != 0) |
1666 |
fprintf(outfile, ", ");
|
1667 |
fprintf(outfile, "long param%d", i + 1); |
1668 |
} |
1669 |
} |
1670 |
fprintf(outfile, ")\n");
|
1671 |
fprintf(outfile, "{\n");
|
1672 |
for(i = 0; i < nb_args; i++) { |
1673 |
fprintf(outfile, " *gen_opparam_ptr++ = param%d;\n", i + 1); |
1674 |
} |
1675 |
fprintf(outfile, " *gen_opc_ptr++ = INDEX_%s;\n", name);
|
1676 |
fprintf(outfile, "}\n\n");
|
1677 |
} |
1678 |
} |
1679 |
|
1680 |
int gen_file(FILE *outfile, int out_type) |
1681 |
{ |
1682 |
int i;
|
1683 |
EXE_SYM *sym; |
1684 |
|
1685 |
if (out_type == OUT_INDEX_OP) {
|
1686 |
fprintf(outfile, "DEF(end, 0, 0)\n");
|
1687 |
fprintf(outfile, "DEF(nop, 0, 0)\n");
|
1688 |
fprintf(outfile, "DEF(nop1, 1, 0)\n");
|
1689 |
fprintf(outfile, "DEF(nop2, 2, 0)\n");
|
1690 |
fprintf(outfile, "DEF(nop3, 3, 0)\n");
|
1691 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
1692 |
const char *name, *p; |
1693 |
name = get_sym_name(sym); |
1694 |
if (strstart(name, OP_PREFIX, &p)) {
|
1695 |
gen_code(name, sym->st_value, sym->st_size, outfile, 2);
|
1696 |
} |
1697 |
} |
1698 |
} else if (out_type == OUT_GEN_OP) { |
1699 |
/* generate gen_xxx functions */
|
1700 |
|
1701 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
1702 |
const char *name; |
1703 |
name = get_sym_name(sym); |
1704 |
if (strstart(name, OP_PREFIX, NULL)) { |
1705 |
if (sym->st_shndx != text_shndx)
|
1706 |
error("invalid section for opcode (0x%x)", sym->st_shndx);
|
1707 |
gen_code(name, sym->st_value, sym->st_size, outfile, 0);
|
1708 |
} |
1709 |
} |
1710 |
|
1711 |
} else {
|
1712 |
/* generate big code generation switch */
|
1713 |
fprintf(outfile, |
1714 |
"int dyngen_code(uint8_t *gen_code_buf,\n"
|
1715 |
" uint16_t *label_offsets, uint16_t *jmp_offsets,\n"
|
1716 |
" const uint16_t *opc_buf, const uint32_t *opparam_buf)\n"
|
1717 |
"{\n"
|
1718 |
" uint8_t *gen_code_ptr;\n"
|
1719 |
" const uint16_t *opc_ptr;\n"
|
1720 |
" const uint32_t *opparam_ptr;\n");
|
1721 |
|
1722 |
#ifdef HOST_ARM
|
1723 |
fprintf(outfile, |
1724 |
" uint8_t *last_gen_code_ptr = gen_code_buf;\n"
|
1725 |
" LDREntry *arm_ldr_ptr = arm_ldr_table;\n"
|
1726 |
" uint32_t *arm_data_ptr = arm_data_table;\n");
|
1727 |
#endif
|
1728 |
|
1729 |
fprintf(outfile, |
1730 |
"\n"
|
1731 |
" gen_code_ptr = gen_code_buf;\n"
|
1732 |
" opc_ptr = opc_buf;\n"
|
1733 |
" opparam_ptr = opparam_buf;\n");
|
1734 |
|
1735 |
/* Generate prologue, if needed. */
|
1736 |
|
1737 |
fprintf(outfile, |
1738 |
" for(;;) {\n"
|
1739 |
" switch(*opc_ptr++) {\n"
|
1740 |
); |
1741 |
|
1742 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
1743 |
const char *name; |
1744 |
name = get_sym_name(sym); |
1745 |
if (strstart(name, OP_PREFIX, NULL)) { |
1746 |
#if 0
|
1747 |
printf("%4d: %s pos=0x%08x len=%d\n",
|
1748 |
i, name, sym->st_value, sym->st_size);
|
1749 |
#endif
|
1750 |
if (sym->st_shndx != text_shndx)
|
1751 |
error("invalid section for opcode (0x%x)", sym->st_shndx);
|
1752 |
gen_code(name, sym->st_value, sym->st_size, outfile, 1);
|
1753 |
} |
1754 |
} |
1755 |
|
1756 |
fprintf(outfile, |
1757 |
" case INDEX_op_nop:\n"
|
1758 |
" break;\n"
|
1759 |
" case INDEX_op_nop1:\n"
|
1760 |
" opparam_ptr++;\n"
|
1761 |
" break;\n"
|
1762 |
" case INDEX_op_nop2:\n"
|
1763 |
" opparam_ptr += 2;\n"
|
1764 |
" break;\n"
|
1765 |
" case INDEX_op_nop3:\n"
|
1766 |
" opparam_ptr += 3;\n"
|
1767 |
" break;\n"
|
1768 |
" default:\n"
|
1769 |
" goto the_end;\n"
|
1770 |
" }\n");
|
1771 |
|
1772 |
#ifdef HOST_ARM
|
1773 |
/* generate constant table if needed */
|
1774 |
fprintf(outfile, |
1775 |
" if ((gen_code_ptr - last_gen_code_ptr) >= (MAX_FRAG_SIZE - MAX_OP_SIZE)) {\n"
|
1776 |
" gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 1);\n"
|
1777 |
" last_gen_code_ptr = gen_code_ptr;\n"
|
1778 |
" arm_ldr_ptr = arm_ldr_table;\n"
|
1779 |
" arm_data_ptr = arm_data_table;\n"
|
1780 |
" }\n");
|
1781 |
#endif
|
1782 |
|
1783 |
|
1784 |
fprintf(outfile, |
1785 |
" }\n"
|
1786 |
" the_end:\n"
|
1787 |
); |
1788 |
|
1789 |
/* generate some code patching */
|
1790 |
#ifdef HOST_ARM
|
1791 |
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");
|
1792 |
#endif
|
1793 |
/* flush instruction cache */
|
1794 |
fprintf(outfile, "flush_icache_range((unsigned long)gen_code_buf, (unsigned long)gen_code_ptr);\n");
|
1795 |
|
1796 |
fprintf(outfile, "return gen_code_ptr - gen_code_buf;\n");
|
1797 |
fprintf(outfile, "}\n\n");
|
1798 |
|
1799 |
} |
1800 |
|
1801 |
return 0; |
1802 |
} |
1803 |
|
1804 |
void usage(void) |
1805 |
{ |
1806 |
printf("dyngen (c) 2003 Fabrice Bellard\n"
|
1807 |
"usage: dyngen [-o outfile] [-c] objfile\n"
|
1808 |
"Generate a dynamic code generator from an object file\n"
|
1809 |
"-c output enum of operations\n"
|
1810 |
"-g output gen_op_xx() functions\n"
|
1811 |
); |
1812 |
exit(1);
|
1813 |
} |
1814 |
|
1815 |
int main(int argc, char **argv) |
1816 |
{ |
1817 |
int c, out_type;
|
1818 |
const char *filename, *outfilename; |
1819 |
FILE *outfile; |
1820 |
|
1821 |
outfilename = "out.c";
|
1822 |
out_type = OUT_CODE; |
1823 |
for(;;) {
|
1824 |
c = getopt(argc, argv, "ho:cg");
|
1825 |
if (c == -1) |
1826 |
break;
|
1827 |
switch(c) {
|
1828 |
case 'h': |
1829 |
usage(); |
1830 |
break;
|
1831 |
case 'o': |
1832 |
outfilename = optarg; |
1833 |
break;
|
1834 |
case 'c': |
1835 |
out_type = OUT_INDEX_OP; |
1836 |
break;
|
1837 |
case 'g': |
1838 |
out_type = OUT_GEN_OP; |
1839 |
break;
|
1840 |
} |
1841 |
} |
1842 |
if (optind >= argc)
|
1843 |
usage(); |
1844 |
filename = argv[optind]; |
1845 |
outfile = fopen(outfilename, "w");
|
1846 |
if (!outfile)
|
1847 |
error("could not open '%s'", outfilename);
|
1848 |
|
1849 |
load_object(filename); |
1850 |
gen_file(outfile, out_type); |
1851 |
fclose(outfile); |
1852 |
return 0; |
1853 |
} |