217 lines
4 KiB
C
217 lines
4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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#include <ctype.h>
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#include <getopt.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "out.h"
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#include "arch.h"
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#include "ranlib.h"
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#include "object.h"
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#include "diagnostics.h"
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#include "stringlist.h"
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int numsort_flg;
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int sectsort_flg;
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int undef_flg;
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int revsort_flg = 1;
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int globl_flg;
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int nosort_flg;
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int arch_flg;
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int prep_flg;
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int read_error;
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struct outsect sbuf;
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long off;
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long s_base[S_MAX]; /* for specially encoded bases */
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char *filename;
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int narg;
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extern int rd_unsigned2();
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static const char prefix[] = "_bmodule_";
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static struct stringlist modules;
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static void do_file(int fd)
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{
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struct outhead hbuf;
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struct outname *nbufp = NULL;
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char *cbufp;
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long fi_to_co;
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long n;
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unsigned readcount;
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int i,j;
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int compare();
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read_error = 0;
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rd_fdopen(fd);
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rd_ohead(&hbuf);
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if (BADMAGIC(hbuf))
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return;
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n = hbuf.oh_nname;
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if (n == 0)
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fatal("%s --- no name list", filename);
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if (hbuf.oh_nchar == 0)
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fatal("%s --- no names", filename);
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if ((readcount = hbuf.oh_nchar) != hbuf.oh_nchar)
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fatal("%s --- string area too big", filename);
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cbufp = calloc(readcount, 1);
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rd_string(cbufp, hbuf.oh_nchar);
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if (read_error)
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goto corrupt;
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fi_to_co = (long) (cbufp - OFF_CHAR(hbuf));
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while (--n >= 0)
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{
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struct outname nbuf;
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struct stringfragment* f;
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rd_name(&nbuf, 1);
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if (read_error)
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goto corrupt;
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if (!(nbuf.on_type & S_EXT))
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continue;
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if ((nbuf.on_type & S_TYP) == S_UND)
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continue;
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if (nbuf.on_foff == 0)
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nbuf.on_mptr = 0;
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else
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nbuf.on_mptr = (char *) (nbuf.on_foff + fi_to_co);
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if (strlen(nbuf.on_mptr) <= sizeof(prefix))
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continue;
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if (memcmp(nbuf.on_mptr, prefix, sizeof(prefix)-1) != 0)
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continue;
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stringlist_add(&modules, strdup(nbuf.on_mptr + sizeof(prefix) - 1));
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}
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if (cbufp)
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free(cbufp);
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return;
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corrupt:
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fatal("%s --- corrupt", filename);
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}
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static void process(int fd)
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{
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uint16_t magic = rd_unsigned2(fd);
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switch(magic) {
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case O_MAGIC:
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lseek(fd, 0L, 0);
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do_file(fd);
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break;
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case ARMAG:
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case AALMAG:
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{
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struct ar_hdr archive_header;
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static char buf[sizeof(archive_header.ar_name)+1];
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while (rd_arhdr(fd, &archive_header))
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{
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long nextpos = lseek(fd, 0L, SEEK_CUR) + archive_header.ar_size;
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if (nextpos & 1)
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nextpos++;
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strncpy(buf, archive_header.ar_name, sizeof(archive_header.ar_name));
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filename = buf;
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if (strcmp(filename, SYMDEF) != 0)
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do_file(fd);
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lseek(fd, nextpos, 0);
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}
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break;
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}
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default:
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fatal("file %s is of unknown format", filename);
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}
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}
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int main(int argc, char* const argv[])
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{
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int opt;
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FILE* outputfp = NULL;
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program_name = argv[0];
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for (;;)
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{
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int opt = getopt(argc, argv, "o:");
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if (opt == -1)
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break;
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switch (opt)
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{
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case 'o':
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outputfp = fopen(optarg, "w");
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if (!outputfp)
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fatal("cannot open output file: %s", strerror(errno));
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break;
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default:
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fatal("usage: abmodules [-o outputfile] [file...]");
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}
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}
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for (;;)
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{
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int fd;
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filename = argv[optind++];
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if (!filename)
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break;
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if ((fd = open(filename, 0)) < 0)
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fatal("cannot open %s: %s", filename, strerror(errno));
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process(fd);
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close(fd);
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}
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if (outputfp)
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{
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struct stringfragment* f;
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fprintf(outputfp, "#include <stdint.h>\n");
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fprintf(outputfp, "\n");
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for (f = modules.first; f; f = f->next)
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fprintf(outputfp, "extern uintptr_t bmodule_%s[];\n", f->data);
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fprintf(outputfp, "\n");
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fprintf(outputfp, "extern void patch_addresses(uintptr_t* module);\n");
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fprintf(outputfp, "\n");
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fprintf(outputfp, "void binit(void) {\n");
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for (f = modules.first; f; f = f->next)
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fprintf(outputfp, "\tpatch_addresses(bmodule_%s);\n", f->data);
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fprintf(outputfp, "}\n");
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fclose(outputfp);
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}
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else
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{
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struct stringfragment* f;
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for (f = modules.first; f; f = f->next)
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printf("%s\n", f->data);
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}
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exit(0);
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}
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void rd_fatal(void)
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{
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fatal("read error on %s", filename);
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}
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