d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge various CTF fixes from illumos

Browse Source 
2942 CTF tools need to handle files which legitimately lack data
2978 ctfconvert still needs to ignore legitimately dataless files on SPARC

Illumos Revisions:	13745:6b3106b4250f
			13754:7231b684c18b

Reference:

https://www.illumos.org/issues/2942
https://www.illumos.org/issues/2978

MFC after:	3 weeks
This commit is contained in:
Pedro F. Giffuni 2013-08-26 22:29:42 +00:00
parent acb3b5d2fe
commit d69c286983
1 changed files with 65 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

70
cddl/contrib/opensolaris/tools/ctf/cvt/dwarf.c
View File

@ -23,8 +23,6 @@
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* DWARF to tdata conversion
*
@ -1796,6 +1794,59 @@ die_resolve(dwarf_t *dw)
} while (dw->dw_nunres != 0);
}
/*
* Any object containing a function or object symbol at any scope should also
* contain DWARF data.
*/
static boolean_t
should_have_dwarf(Elf *elf)
{
Elf_Scn *scn = NULL;
Elf_Data *data = NULL;
GElf_Shdr shdr;
GElf_Sym sym;
uint32_t symdx = 0;
size_t nsyms = 0;
boolean_t found = B_FALSE;
while ((scn = elf_nextscn(elf, scn)) != NULL) {
gelf_getshdr(scn, &shdr);
if (shdr.sh_type == SHT_SYMTAB) {
found = B_TRUE;
break;
}
}
if (!found)
terminate("cannot convert stripped objects\n");
data = elf_getdata(scn, NULL);
nsyms = shdr.sh_size / shdr.sh_entsize;
for (symdx = 0; symdx < nsyms; symdx++) {
gelf_getsym(data, symdx, &sym);
if ((GELF_ST_TYPE(sym.st_info) == STT_FUNC) ||
(GELF_ST_TYPE(sym.st_info) == STT_TLS) ||
(GELF_ST_TYPE(sym.st_info) == STT_OBJECT)) {
char *name;
name = elf_strptr(elf, shdr.sh_link, sym.st_name);
/* Studio emits these local symbols regardless */
if ((strcmp(name, "Bbss.bss") != 0) &&
(strcmp(name, "Ttbss.bss") != 0) &&
(strcmp(name, "Ddata.data") != 0) &&
(strcmp(name, "Ttdata.data") != 0) &&
(strcmp(name, "Drodata.rodata") != 0))
return (B_TRUE);
}
}
return (B_FALSE);
}
/*ARGSUSED*/
int
dw_read(tdata_t *td, Elf *elf, char *filename __unused)
@ -1820,8 +1871,12 @@ dw_read(tdata_t *td, Elf *elf, char *filename __unused)
if ((rc = dwarf_elf_init(elf, DW_DLC_READ, &dw.dw_dw,
&dw.dw_err)) == DW_DLV_NO_ENTRY) {
errno = ENOENT;
return (-1);
if (should_have_dwarf(elf)) {
errno = ENOENT;
return (-1);
} else {
return (0);
}
} else if (rc != DW_DLV_OK) {
if (dwarf_errno(&dw.dw_err) == DW_DLE_DEBUG_INFO_NULL) {
/*
@ -1839,9 +1894,14 @@ dw_read(tdata_t *td, Elf *elf, char *filename __unused)
&addrsz, &nxthdr, &dw.dw_err)) != DW_DLV_OK)
terminate("rc = %d %s\n", rc, dwarf_errmsg(&dw.dw_err));
if ((cu = die_sibling(&dw, NULL)) == NULL)
if ((cu = die_sibling(&dw, NULL)) == NULL ||
(((child = die_child(&dw, cu)) == NULL) &&
should_have_dwarf(elf))) {
terminate("file does not contain dwarf type data "
"(try compiling with -g)\n");
} else if (child == NULL) {
return (0);
}
dw.dw_maxoff = nxthdr - 1;