void rebootcmd(int argc, char *argv[]) { Chan *c; Exec exec; Execvals ev; ulong magic, text, rtext, entry, data, size; uchar *p; if(argc == 0) exit(0); c = namec(argv[0], Aopen, OEXEC, 0); if(waserror()){ cclose(c); nexterror(); } readn(c, &exec, sizeof(Exec)); magic = l2be(exec.magic); /* * AOUT_MAGIC is sometimes defined like this: * #define AOUT_MAGIC V_MAGIC || magic==M_MAGIC * so we can only use it in a fairly stylized manner. */ if(magic == AOUT_MAGIC) { entry = l2be(exec.entry); text = l2be(exec.text); data = l2be(exec.data); } else if(parseboothdr && (*parseboothdr)(c, magic, &ev) >= 0 || readelfhdr(c, magic, &ev) >= 0 || readelf64hdr(c, magic, &ev) >= 0){ entry = ev.entry; text = ev.textsize; data = ev.datasize; } else { error(Ebadexec); return; /* for the compiler */ } /* round text out to page boundary */ rtext = ROUNDUP(entry+text, BY2PG) - entry; size = rtext + data; p = malloc(size); if(p == nil) error(Enomem); if(waserror()){ free(p); nexterror(); } memset(p, 0, size); readn(c, p, text); readn(c, p + rtext, data); ksetenv("bootfile", argv[0], 1); setbootcmd(argc-1, argv+1); reboot((void*)entry, p, size); panic("return from reboot!"); }
/* main(). */ int main(int argc, char *argv[]) { textline *lines = NULL; char **arg; int ret = 0; int count, i; readoptions(argc, argv); if (optind == argc) { err("nothing to do."); exit(EXIT_FAILURE); } for (arg = argv + optind ; (thefilename = *arg) != NULL ; ++arg) { if (!(thefile = fopen(thefilename, "rb"))) { perror(thefilename); ++ret; continue; } if (!readelfhdr() || !readproghdrs() || !readsecthdrs()) { fclose(thefile); ++ret; continue; } describeehdr(stdout); if (ldepls && proghdrs) { if ((count = getlibraries(&lines))) { outputlist(stdout, lines, count, "Dependencies: "); free(lines); } } if (srcfls && secthdrs) { if ((count = getsrcfiles(&lines))) { qsort(lines, count, sizeof *lines, linesorter); outputlist(stdout, lines, count, "Source files: "); free(lines); } } makenumberfmts(); if (phdrls && proghdrs) { printf("Program header table entries: %d", elffhdr.e_phnum); if (dooffs) printf(" (%lX - %lX)", (unsigned long)elffhdr.e_phoff, (unsigned long)elffhdr.e_phoff + elffhdr.e_phnum * elffhdr.e_phentsize); putchar('\n'); lines = gettextlines(elffhdr.e_phnum); for (i = 0 ; i < elffhdr.e_phnum ; ++i) { append(lines + i, "%2d ", i); describephdr(lines + i, proghdr + i); } formatlist(stdout, lines, elffhdr.e_phnum); free(lines); } if (shdrls && secthdrs) { printf("Section header table entries: %d", elffhdr.e_shnum); if (dooffs) printf(" (%lX - %lX)", (unsigned long)elffhdr.e_shoff, (unsigned long)elffhdr.e_shoff + elffhdr.e_shnum * elffhdr.e_shentsize); putchar('\n'); lines = gettextlines(elffhdr.e_shnum); for (i = 0 ; i < elffhdr.e_shnum ; ++i) { append(lines + i, "%2d ", i); describeshdr(lines + i, secthdr + i); } formatlist(stdout, lines, elffhdr.e_shnum); free(lines); } fclose(thefile); free(proghdr); free(secthdr); free(sectstr); } return ret; }