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Introduce get_proc_name_in_image()

Browse source 
This is similar to get_proc_name() but takes an already mapped
image.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
This commit is contained in:
Arun Sharma 2012-03-12 18:45:50 -07:00
parent 6525714c27
commit d276b7a961
2 changed files with 36 additions and 10 deletions
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34
src/elfxx.c
View file

@ -127,22 +127,19 @@ elf_w (lookup_symbol) (unw_addr_space_t as,
sensitive to the performance of this routine, why bother... */ sensitive to the performance of this routine, why bother... */
HIDDEN int HIDDEN int
elf_w (get_proc_name) (unw_addr_space_t as, pid_t pid, unw_word_t ip, elf_w (get_proc_name_in_image) (unw_addr_space_t as, struct elf_image *ei,
unsigned long segbase,
unsigned long mapoff,
unw_word_t ip,
char *buf, size_t buf_len, unw_word_t *offp) char *buf, size_t buf_len, unw_word_t *offp)
{ {
unsigned long segbase, mapoff;
Elf_W (Addr) load_offset = 0; Elf_W (Addr) load_offset = 0;
struct elf_image ei;
Elf_W (Ehdr) *ehdr; Elf_W (Ehdr) *ehdr;
Elf_W (Phdr) *phdr; Elf_W (Phdr) *phdr;
int i, ret; int i, ret;
ret = tdep_get_elf_image (&ei, pid, ip, &segbase, &mapoff, NULL, 0); ehdr = ei->image;
if (ret < 0) phdr = (Elf_W (Phdr) *) ((char *) ei->image + ehdr->e_phoff);
return ret;
ehdr = ei.image;
phdr = (Elf_W (Phdr) *) ((char *) ei.image + ehdr->e_phoff);
for (i = 0; i < ehdr->e_phnum; ++i) for (i = 0; i < ehdr->e_phnum; ++i)
if (phdr[i].p_type == PT_LOAD && phdr[i].p_offset == mapoff) if (phdr[i].p_type == PT_LOAD && phdr[i].p_offset == mapoff)
@ -151,7 +148,24 @@ elf_w (get_proc_name) (unw_addr_space_t as, pid_t pid, unw_word_t ip,
break; break;
} }
ret = elf_w (lookup_symbol) (as, ip, &ei, load_offset, buf, buf_len, offp); ret = elf_w (lookup_symbol) (as, ip, ei, load_offset, buf, buf_len, offp);
return ret;
}
HIDDEN int
elf_w (get_proc_name) (unw_addr_space_t as, pid_t pid, unw_word_t ip,
char *buf, size_t buf_len, unw_word_t *offp)
{
unsigned long segbase, mapoff;
struct elf_image ei;
int ret;
ret = tdep_get_elf_image (&ei, pid, ip, &segbase, &mapoff, NULL, 0);
if (ret < 0)
return ret;
ret = elf_w (get_proc_name_in_image) (as, &ei, segbase, mapoff, ip, buf, buf_len, offp);
munmap (ei.image, ei.size); munmap (ei.image, ei.size);
ei.image = NULL; ei.image = NULL;

12
src/elfxx.h
View file

@ -43,6 +43,18 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
#include "libunwind_i.h" #include "libunwind_i.h"
extern int elf_w (get_proc_name) (unw_addr_space_t as,
pid_t pid, unw_word_t ip,
char *buf, size_t len,
unw_word_t *offp);
extern int elf_w (get_proc_name_in_image) (unw_addr_space_t as,
struct elf_image *ei,
unsigned long segbase,
unsigned long mapoff,
unw_word_t ip,
char *buf, size_t buf_len, unw_word_t *offp);
extern int elf_w (get_proc_name) (unw_addr_space_t as, extern int elf_w (get_proc_name) (unw_addr_space_t as,
pid_t pid, unw_word_t ip, pid_t pid, unw_word_t ip,
char *buf, size_t len, char *buf, size_t len,