FreeCalypso > hg > freecalypso-reveng
view leo-obj/tool/lowlevel.c @ 351:0ca005dbab30
fluid-mnf/devices.txt: OM support, safe S71PL-J defaults
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Fri, 13 Mar 2020 07:19:37 +0000 |
parents | 87b82398a08b |
children |
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/* * This C module implements the low-level steps of TI COFF image analysis. */ #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 "filestruct.h" #include "globals.h" mmap_objfile() { int fd; struct stat st; fd = open(objfilename, O_RDONLY); if (fd < 0) { perror(objfilename); exit(1); } fstat(fd, &st); if (!S_ISREG(st.st_mode)) { fprintf(stderr, "error: %s is not a regular file\n", objfilename); exit(1); } objfile_tot_size = st.st_size; filemap = mmap(NULL, objfile_tot_size, PROT_READ, MAP_PRIVATE, fd, 0L); if (filemap == MAP_FAILED) { perror("mmap"); exit(1); } 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; } initial_parse_hdr() { unsigned symtab_offset; filehdr_struct = (struct external_filehdr *) filemap; if (get_u16(filehdr_struct->f_magic) != 0xC2) { fprintf(stderr, "error: %s is not a TI COFF2 object\n", objfilename); exit(1); } if (get_u16(filehdr_struct->f_target_id) != 0x97) { fprintf(stderr, "error: TI COFF object %s is not for TMS470\n", objfilename); exit(1); } if (get_u16(filehdr_struct->f_opthdr)) { fprintf(stderr, "error: %s has the \"optional\" header present\n", objfilename); exit(1); } sections_raw = (struct external_scnhdr *) (filemap + sizeof(struct external_filehdr)); nsections = get_u16(filehdr_struct->f_nscns); symtab_offset = get_u32(filehdr_struct->f_symptr); symtab_raw = (struct external_syment *)(filemap + symtab_offset); nsymtab = get_u32(filehdr_struct->f_nsyms); strtab_offset = symtab_offset + sizeof(struct external_syment) * nsymtab; }