diff options
| -rw-r--r-- | tools/perf/util/probe-event.c | 76 | ||||
| -rw-r--r-- | tools/perf/util/symbol-elf.c | 5 | ||||
| -rw-r--r-- | tools/perf/util/symbol.h | 5 | ||||
| -rw-r--r-- | tools/perf/util/unwind.c | 20 |
4 files changed, 37 insertions, 69 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index c68711c50f4..a8a9b6cd93a 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -173,54 +173,6 @@ const char *kernel_get_module_path(const char *module) return (dso) ? dso->long_name : NULL; } -#ifdef HAVE_DWARF_SUPPORT -/* Copied from unwind.c */ -static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, - GElf_Shdr *shp, const char *name) -{ - Elf_Scn *sec = NULL; - - while ((sec = elf_nextscn(elf, sec)) != NULL) { - char *str; - - gelf_getshdr(sec, shp); - str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); - if (!strcmp(name, str)) - break; - } - - return sec; -} - -static int get_text_start_address(const char *exec, unsigned long *address) -{ - Elf *elf; - GElf_Ehdr ehdr; - GElf_Shdr shdr; - int fd, ret = -ENOENT; - - fd = open(exec, O_RDONLY); - if (fd < 0) - return -errno; - - elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); - if (elf == NULL) - return -EINVAL; - - if (gelf_getehdr(elf, &ehdr) == NULL) - goto out; - - if (!elf_section_by_name(elf, &ehdr, &shdr, ".text")) - goto out; - - *address = shdr.sh_addr - shdr.sh_offset; - ret = 0; -out: - elf_end(elf); - return ret; -} -#endif - static int init_user_exec(void) { int ret = 0; @@ -341,6 +293,34 @@ static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, return 0; } +static int get_text_start_address(const char *exec, unsigned long *address) +{ + Elf *elf; + GElf_Ehdr ehdr; + GElf_Shdr shdr; + int fd, ret = -ENOENT; + + fd = open(exec, O_RDONLY); + if (fd < 0) + return -errno; + + elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); + if (elf == NULL) + return -EINVAL; + + if (gelf_getehdr(elf, &ehdr) == NULL) + goto out; + + if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL)) + goto out; + + *address = shdr.sh_addr - shdr.sh_offset; + ret = 0; +out: + elf_end(elf); + return ret; +} + static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs, int ntevs, const char *exec) { diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c index 4b0a127a4d3..75945672870 100644 --- a/tools/perf/util/symbol-elf.c +++ b/tools/perf/util/symbol-elf.c @@ -136,9 +136,8 @@ static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr) return -1; } -static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, - GElf_Shdr *shp, const char *name, - size_t *idx) +Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, + GElf_Shdr *shp, const char *name, size_t *idx) { Elf_Scn *sec = NULL; size_t cnt = 1; diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h index cbd68036180..fffe2888a1c 100644 --- a/tools/perf/util/symbol.h +++ b/tools/perf/util/symbol.h @@ -52,6 +52,11 @@ static inline char *bfd_demangle(void __maybe_unused *v, # define PERF_ELF_C_READ_MMAP ELF_C_READ #endif +#ifdef HAVE_LIBELF_SUPPORT +extern Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, + GElf_Shdr *shp, const char *name, size_t *idx); +#endif + #ifndef DMGL_PARAMS #define DMGL_PARAMS (1 << 0) /* Include function args */ #define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */ diff --git a/tools/perf/util/unwind.c b/tools/perf/util/unwind.c index 416f22bf369..742f23bf35f 100644 --- a/tools/perf/util/unwind.c +++ b/tools/perf/util/unwind.c @@ -28,6 +28,7 @@ #include "session.h" #include "perf_regs.h" #include "unwind.h" +#include "symbol.h" #include "util.h" extern int @@ -158,23 +159,6 @@ static int __dw_read_encoded_value(u8 **p, u8 *end, u64 *val, __v; \ }) -static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, - GElf_Shdr *shp, const char *name) -{ - Elf_Scn *sec = NULL; - - while ((sec = elf_nextscn(elf, sec)) != NULL) { - char *str; - - gelf_getshdr(sec, shp); - str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); - if (!strcmp(name, str)) - break; - } - - return sec; -} - static u64 elf_section_offset(int fd, const char *name) { Elf *elf; @@ -190,7 +174,7 @@ static u64 elf_section_offset(int fd, const char *name) if (gelf_getehdr(elf, &ehdr) == NULL) break; - if (!elf_section_by_name(elf, &ehdr, &shdr, name)) + if (!elf_section_by_name(elf, &ehdr, &shdr, name, NULL)) break; offset = shdr.sh_offset; |