134 lines
3.1 KiB
C
134 lines
3.1 KiB
C
/* $Header$ */
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/* a.out file reading ... */
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#include "rd.h"
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#if defined(sun) && defined(mc68020)
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#include <a.out.h>
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#include <stdio.h>
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static FILE *inf;
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static struct exec bh;
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static long seg_strings;
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static struct outhead hh;
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#define readf(a, b, c) (fread((char *)(a), (b), (int)(c), inf))
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int
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rd_open(f)
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char *f;
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{
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if ((inf = fopen(f, "r")) == NULL) return 0;
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return 1;
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}
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rd_ohead(h)
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struct outhead *h;
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{
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if (! readf(&bh, sizeof(struct exec), 1)) rd_fatal();
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if (N_BADMAG(bh)) rd_fatal();
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h->oh_magic = O_CONVERTED;
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h->oh_stamp = 0;
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h->oh_nsect = 4;
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h->oh_nname = 3 + bh.a_syms / sizeof(struct nlist);
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h->oh_nrelo = (bh.a_trsize + bh.a_drsize) / sizeof(struct reloc_info_68k);
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h->oh_flags = h->oh_nrelo ? HF_LINK : 0;
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if (bh.a_magic == ZMAGIC) bh.a_text -= sizeof(struct exec);
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h->oh_nemit = bh.a_text + bh.a_data;
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if (bh.a_magic == ZMAGIC) bh.a_text += sizeof(struct exec);
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fseek(inf, N_STROFF(bh), 0);
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h->oh_nchar = getw(inf) + 6 + 6 + 5 - 4; /* ".text", ".data", ".bss",
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minus the size word */
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seg_strings = h->oh_nchar - 17;
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if (bh.a_magic == ZMAGIC) bh.a_text -= sizeof(struct exec);
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fseek(inf, sizeof(struct exec) + bh.a_text + bh.a_data, 0);
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hh = *h;
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}
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/*ARGSUSED1*/
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rd_name(names, count)
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register struct outname *names;
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unsigned int count; /* ignored; complete namelist is read */
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{
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names->on_valu = 0; names->on_foff = seg_strings + OFF_CHAR(hh);
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names->on_desc = 0; names->on_type = S_MIN | S_SCT;
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names++;
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names->on_valu = 0; names->on_foff = seg_strings + OFF_CHAR(hh) + 6;
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names->on_desc = 0; names->on_type = (S_MIN+2) | S_SCT;
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names++;
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names->on_valu = 0; names->on_foff = seg_strings + OFF_CHAR(hh) + 12;
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names->on_desc = 0; names->on_type = (S_MIN+3) | S_SCT;
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names++;
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count = bh.a_syms / sizeof(struct nlist);
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while (count > 0) {
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struct nlist n;
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if (! readf(&n, sizeof(struct nlist), 1)) rd_fatal();
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count--;
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names->on_desc = n.n_desc;
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if (n.n_un.n_strx - 4 < 0) names->on_foff = 0;
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else names->on_foff = OFF_CHAR(hh) - 4 + n.n_un.n_strx;
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names->on_valu = n.n_value;
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if (n.n_type & N_STAB) {
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names->on_type = n.n_type << 8;
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names++;
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continue;
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}
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switch(n.n_type & ~N_EXT) {
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case N_ABS:
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names->on_type = S_ABS;
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break;
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case N_TEXT:
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names->on_type = S_MIN;
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break;
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case N_DATA:
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names->on_type = S_MIN + 2;
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names->on_valu -= bh.a_text;
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break;
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case N_BSS:
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names->on_type = S_MIN + 3;
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names->on_valu -= bh.a_text + bh.a_data;
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break;
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case N_UNDF:
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if (! names->on_valu) {
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names->on_type = S_UND;
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break;
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}
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names->on_type = (S_MIN + 3) | S_COM;
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break;
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case N_FN:
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names->on_type = S_FIL;
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break;
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default:
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rd_fatal();
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}
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if (n.n_type & N_EXT) names->on_type |= S_EXT;
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names++;
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}
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}
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extern char *strcpy();
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rd_string(strings, count)
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register char *strings;
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long count;
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{
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if (bh.a_magic == ZMAGIC) bh.a_text += sizeof(struct exec);
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fseek(inf, N_STROFF(bh)+4, 0);
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if (! readf(strings, (int)count-17, 1)) rd_fatal();
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strings += count-17;
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strcpy(strings, ".text"); strings += 6;
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strcpy(strings, ".data"); strings += 6;
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strcpy(strings, ".bss");
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}
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rd_close()
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{
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fclose(inf);
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}
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#endif
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