FreeCalypso > hg > freecalypso-reveng
view objgrep/lowlevel.c @ 217:7d7a4367ec28
leo-obj: disasm hints created for l1audio_cust.obj
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 14 Mar 2017 06:19:52 +0000 |
parents | c25367bb7656 |
children |
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/* * This C module implements the low-level steps of file mapping and access. */ #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> #include "globals.h" mmap_objfile() { int fd; struct stat st; fd = open(objfilename, O_RDONLY); if (fd < 0) { perror(objfilename); exit(2); } fstat(fd, &st); if (!S_ISREG(st.st_mode)) { fprintf(stderr, "error: %s is not a regular file\n", objfilename); exit(2); } objfile_tot_size = st.st_size; objfilemap = mmap(NULL, objfile_tot_size, PROT_READ, MAP_PRIVATE, fd, 0L); if (objfilemap == MAP_FAILED) { perror("mmap"); exit(2); } close(fd); } mmap_binfile() { int fd; struct stat st; fd = open(binfilename, O_RDONLY); if (fd < 0) { perror(binfilename); exit(2); } fstat(fd, &st); if (!S_ISREG(st.st_mode)) { fprintf(stderr, "error: %s is not a regular file\n", binfilename); exit(2); } binfile_tot_size = st.st_size; binfilemap = mmap(NULL, binfile_tot_size, PROT_READ, MAP_PRIVATE, fd, 0L); if (binfilemap == MAP_FAILED) { perror("mmap"); exit(2); } close(fd); } unsigned get_u16(ptr) u_char *ptr; { return ptr[0] | ptr[1] << 8; } get_s16(ptr) u_char *ptr; { int i; i = ptr[0] | ptr[1] << 8; if (i >= 32768) i -= 65536; return(i); } unsigned get_u32(ptr) u_char *ptr; { return ptr[0] | ptr[1] << 8 | ptr[2] << 16 | ptr[3] << 24; }