[ktap] [PATCH 1/4] symbol: add elf_section_by_name() helper (based on linux/perf/symbol-elf.c)
- From: Azat Khuzhin <a3at.mail@xxxxxxxxx>
- To: ktap@xxxxxxxxxxxxx
- Date: Sat, 9 Nov 2013 23:44:01 +0400
Add a helper for searching section in elf by it name.
Drop from original unused arguments, and variables.
Signed-off-by: Azat Khuzhin <a3at.mail@xxxxxxxxx>
---
userspace/symbol.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/userspace/symbol.c b/userspace/symbol.c
index 2e83281..dfbc40d 100644
--- a/userspace/symbol.c
+++ b/userspace/symbol.c
@@ -32,6 +32,26 @@
#include <libelf.h>
+static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
+ GElf_Shdr *shp, const char *name)
+{
+ Elf_Scn *scn = NULL;
+
+ /* Elf is corrupted/truncated, avoid calling elf_strptr. */
+ if (!elf_rawdata(elf_getscn(elf, ep->e_shstrndx), NULL))
+ return NULL;
+
+ while ((scn = elf_nextscn(elf, scn)) != NULL) {
+ char *str;
+
+ gelf_getshdr(scn, shp);
+ str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
+ if (!strcmp(name, str))
+ break;
+ }
+
+ return scn;
+}
/**
* @return v_addr of "LOAD" program header, that have zero offset.
--
1.8.4.rc3
Other related posts:
- » [ktap] [PATCH 1/4] symbol: add elf_section_by_name() helper (based on linux/perf/symbol-elf.c) - Azat Khuzhin
