2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
/*
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* "nlist.c", Peter Valkenburg, january 1989.
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*/
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#include <lib.h>
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#include <string.h>
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#include <a.out.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdio.h>
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#define fail(fp) (fclose(fp), -1) /* ret. exp. when nlist fails */
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_PROTOTYPE( int nlist, (char *file, struct nlist nl[]));
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/*
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* Nlist fills fields n_sclass and n_value of array nl with values found in
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* non-stripped executable file. Entries that are not found have their
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* n_value/n_sclass fields set to 0. Nl ends with a 0 or nul string n_name.
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* The return value is -1 on failure, else the number of entries not found.
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*/
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int nlist(file, nl)
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char *file;
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struct nlist nl[];
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{
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int nents, nsrch, nfound, i;
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struct nlist nlent;
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FILE *fp;
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struct exec hd;
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/* open executable with namelist */
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if ((fp = fopen(file, "r")) == NULL)
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return -1;
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/* get header and seek to start of namelist */
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if (fread((char *) &hd, sizeof(struct exec), 1, fp) != 1 ||
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BADMAG(hd) || fseek(fp, A_SYMPOS(hd), SEEK_SET) != 0)
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return fail(fp);
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/* determine number of entries searched for & reset fields */
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nsrch = 0;
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while (nl[nsrch].n_name != NULL && *(nl[nsrch].n_name) != '\0') {
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nl[nsrch].n_sclass = 0;
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nl[nsrch].n_value = 0;
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nl[nsrch].n_type = 0; /* for compatability */
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nsrch++;
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}
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/* loop through namelist & fill in user array */
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nfound = 0;
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for (nents = (hd.a_syms & 0xFFFF) / sizeof(struct nlist);
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nents > 0; nents--) {
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if (nsrch == nfound)
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break; /* no need to look further */
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if (fread((char *) &nlent, sizeof(struct nlist), 1, fp) != 1)
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return fail(fp);
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for (i = 0; i < nsrch; i++)
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if (nl[i].n_sclass == 0 &&
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strncmp(nl[i].n_name, nlent.n_name,
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sizeof(nlent.n_name)) == 0) {
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nl[i] = nlent;
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nfound++;
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break;
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}
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}
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(void) fclose(fp);
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return nsrch - nfound;
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}
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