FreeCalypso > hg > freecalypso-reveng
view arm7dis/common.c @ 111:0f94d17899b3
tiobjd: disassembly integrated, no relocs or hints yet
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Thu, 03 Apr 2014 05:14:15 +0000 |
parents | c883e60df239 |
children |
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/* * Lean and mean ARM7TDMI disassembler * Written by Spacefalcon the Outlaw */ #include <sys/types.h> #include <sys/file.h> #include <sys/stat.h> #include <sys/mman.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> char *binfilename; u_char *filemap; unsigned disasm_len, base_vma; common_init(argc, argv, instr_size) char **argv; { int fd; struct stat st; unsigned fileoff; if (argc < 2 || argc > 5) { fprintf(stderr, "usage: %s binfile [file-offset [len [vaddr]]]\n", argv[0]); exit(1); } binfilename = argv[1]; fd = open(binfilename, O_RDONLY); if (fd < 0) { perror(binfilename); exit(1); } fstat(fd, &st); if (!S_ISREG(st.st_mode)) { fprintf(stderr, "error: %s is not a regular file\n", binfilename); exit(1); } if (argc > 2) fileoff = strtoul(argv[2], 0, 0); else fileoff = 0; if (fileoff > st.st_size) { fprintf(stderr, "error: specified file offset is past the end of file\n"); exit(1); } if (argc > 3) { disasm_len = strtoul(argv[3], 0, 0); if (disasm_len > st.st_size - fileoff) { fprintf(stderr, "error: specified length is past the end of file\n"); exit(1); } } else disasm_len = st.st_size - fileoff; if (disasm_len & (instr_size - 1)) { fprintf(stderr, "error: length of region to be disassembled must be a multiple of %d bytes\n", instr_size); exit(1); } filemap = mmap(NULL, (size_t) disasm_len, PROT_READ, MAP_PRIVATE, fd, (off_t) fileoff); if (filemap == MAP_FAILED) { perror("mmap"); exit(1); } close(fd); if (argc > 4) base_vma = strtoul(argv[4], 0, 0); else base_vma = fileoff; return(0); } unsigned get_u16(ptr) u_char *ptr; { return ptr[0] | ptr[1] << 8; } unsigned get_u32(ptr) u_char *ptr; { return ptr[0] | ptr[1] << 8 | ptr[2] << 16 | ptr[3] << 24; }