qbit/go
1
0
Fork 0
mirror of https://github.com/golang/go synced 2024-11-22 07:14:40 -07:00
Code Releases Activity

support symbol tables and line numbers in 6.out executables

Browse Source 
SVN=122700
This commit is contained in:
Rob Pike 2008-06-13 12:55:37 -07:00
parent e9c9c9ace5
commit 34691ccd10
2 changed files with 50 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
src/libmach_amd64/executable.c
View File

@ -626,7 +626,8 @@ elf64dotout(int fd, Fhdr *fp, ExecHdr *hp)
ushort (*swab)(ushort); ushort (*swab)(ushort);
Ehdr64 *ep; Ehdr64 *ep;
Phdr64 *ph; Phdr64 *ph;
int i, it, id, is, phsz; Shdr64 *sh;
int i, it, id, is, phsz, shsz;
/* bitswap the header according to the DATA format */ /* bitswap the header according to the DATA format */
ep = &hp->e.elfhdr64; ep = &hp->e.elfhdr64;
@ -711,6 +712,17 @@ print("entry: 0x%x\n", ep->elfentry);
} }
hswal(ph, phsz/sizeof(ulong), swal); hswal(ph, phsz/sizeof(ulong), swal);
shsz = sizeof(Shdr64)*ep->shnum;
sh = malloc(shsz);
if(sh) {
seek(fd, ep->shoff, 0);
if(read(fd, sh, shsz) < 0) {
free(sh);
sh = 0;
} else
hswal(ph, phsz/sizeof(ulong), swal);
}
/* find text, data and symbols and install them */ /* find text, data and symbols and install them */
it = id = is = -1; it = id = is = -1;
for(i = 0; i < ep->phnum; i++) { for(i = 0; i < ep->phnum; i++) {
@ -748,7 +760,9 @@ print("entry: 0x%x\n", ep->elfentry);
} }
werrstr("No TEXT or DATA sections"); werrstr("No TEXT or DATA sections");
error:
free(ph); free(ph);
free(sh);
return 0; return 0;
} }
@ -756,7 +770,40 @@ print("entry: 0x%x\n", ep->elfentry);
setdata(fp, ph[id].vaddr, ph[id].filesz, ph[id].offset, ph[id].memsz - ph[id].filesz); setdata(fp, ph[id].vaddr, ph[id].filesz, ph[id].offset, ph[id].memsz - ph[id].filesz);
if(is != -1) if(is != -1)
setsym(fp, ph[is].filesz, 0, ph[is].memsz, ph[is].offset); setsym(fp, ph[is].filesz, 0, ph[is].memsz, ph[is].offset);
else if(ep->machine == AMD64 && sh != 0){
char *buf;
uvlong symsize = 0;
uvlong symoff = 0;
uvlong pclnsz = 0;
/* load shstrtab names */
buf = malloc(sh[ep->shstrndx].size);
if (buf == 0)
goto done;
memset(buf, 0, sizeof buf);
seek(fd, sh[ep->shstrndx].offset, 0);
read(fd, buf, sh[ep->shstrndx].size);
for(i = 0; i < ep->shnum; i++) {
if (sh[i].type == 2 && strcmp(&buf[sh[i].name], ".gosymtab") == 0) {
symsize = sh[i].size;
symoff = sh[i].offset;
}
if (sh[i].type == 2 && strcmp(&buf[sh[i].name], ".gopclntab") == 0) {
if (sh[i].offset != symoff+symsize) {
werrstr("pc line table not contiguous with symbol table");
free(buf);
goto error;
}
pclnsz = sh[i].size;
}
}
setsym(fp, symsize, 0, pclnsz, symoff);
free(buf);
}
done:
free(ph); free(ph);
free(sh);
return 1; return 1;
} }

2
src/make.bash
View File

@ -3,6 +3,8 @@
# Use of this source code is governed by a BSD-style # Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file. # license that can be found in the LICENSE file.
bash clean.bash
for i in lib9 libbio libmach_amd64 for i in lib9 libbio libmach_amd64
do do
cd $i cd $i