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/*
* spp.c
* Extracts the symbol table from an HP-UX executable file
* to be used in a later pass of the linker. (ld does not
* support the -A option.)
*/
#include <stdio.h>
#include <a.out.h>
filecpy(to, from, n)
FILE *to, *from;
register int n;
{
char buffer[BUFSIZ];
for (;;)
if (n > BUFSIZ) {
fread(buffer, BUFSIZ, 1, from);
fwrite(buffer, BUFSIZ, 1, to);
n -= BUFSIZ;
} else if (n > 0) {
fread(buffer, 1, n, from);
fwrite(buffer, 1, n, to);
break;
} else
break;
}
stabcpy(to,from,n)
FILE *to, *from;
register int n;
{
char buffer[BUFSIZ];
struct nlist_ nbuf;
int len;
for (;;)
if (n <= 0) break;
else {
fread(&nbuf,sizeof(nbuf),1,from);
len = nbuf.n_length;
fread(buffer,len,1,from);
buffer[len] = '\0';
nbuf.n_type = EXTERN | ABS;
if (((strncmp(buffer,"_end",4) == NULL) &&
(len == 4)) ||
((strncmp(buffer,"_etext",6) == NULL) &&
(len == 6)) ||
((strncmp(buffer,"_edata",6) == NULL) &&
(len == 6)))
buffer[1] = 'E';
fwrite(&nbuf,sizeof(nbuf),1,to);
fwrite(buffer,len,1,to);
n -= sizeof(nbuf) + nbuf.n_length;
}
}
main(argc,argv)
int argc;
char *argv[];
{
FILE *file,*sfile;
struct exec header;
char sfile_name[BUFSIZ];
long skip,size0,size1;
if(argc != 2) {
fprintf(stderr,"usage: spp <exefile>\n");
exit(1);
}
if((file = fopen(argv[1],"r")) == NULL) {
fprintf(stderr,"can't open exefile: %s\n", argv[1]);
exit(1);
}
strcpy(sfile_name,argv[1]);
strcat(sfile_name,".stb");
if((sfile = fopen(sfile_name,"w")) == NULL) {
fprintf(stderr,"can't create stbfile: %s\n",
sfile_name);
exit(1);
}
fread(&header,sizeof(header),1,file);
skip = MODCAL_OFFSET(header);
size0 = header.a_pasint;
size1= header.a_dnttsize +
header.a_sltsize + header.a_vtsize + header.a_trsize +
header.a_drsize;
header.a_magic.file_type = RELOC_MAGIC;
header.a_text = 0;
header.a_data = 0;
header.a_bss = 0;
fwrite(&header,sizeof(header),1,sfile);
fseek(file,skip,0);
filecpy(sfile,file,size0);
stabcpy(sfile,file,header.a_lesyms);
filecpy(sfile,file,size1);
fclose(file);
fclose(sfile);
}
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