openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

perf kcore_copy: Iterate phdrs 

In preparation to add more program headers, iterate phdrs instead of
assuming there is only one for the kernel text and one for the modules.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/1526986485-6562-15-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2018-05-22 13:54:42 +03:00 committed by Arnaldo Carvalho de Melo
parent 15acef6c37
commit d2c959803c
1 changed files with 10 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
tools/perf/util/symbol-elf.c
View File

@ -1701,10 +1701,11 @@ int kcore_copy(const char *from_dir, const char *to_dir)
struct kcore kcore;
struct kcore extract;
int idx = 0, err = -1;
off_t offset, sz, modules_offset = 0;
off_t offset, sz;
struct kcore_copy_info kci = { .stext = 0, };
char kcore_filename[PATH_MAX];
char extract_filename[PATH_MAX];
struct phdr_data *p;
INIT_LIST_HEAD(&kci.phdrs);
@ -1733,14 +1734,10 @@ int kcore_copy(const char *from_dir, const char *to_dir)
gelf_fsize(extract.elf, ELF_T_PHDR, kci.phnum, EV_CURRENT);
offset = round_up(offset, page_size);
if (kcore__add_phdr(&extract, idx++, offset, kci.kernel_map.addr,
kci.kernel_map.len))
goto out_extract_close;
kcore_copy__for_each_phdr(&kci, p) {
off_t offs = p->rel + offset;
if (kci.modules_map.addr) {
modules_offset = offset + kci.kernel_map.len;
if (kcore__add_phdr(&extract, idx, modules_offset,
kci.modules_map.addr, kci.modules_map.len))
if (kcore__add_phdr(&extract, idx++, offs, p->addr, p->len))
goto out_extract_close;
}
@ -1748,14 +1745,12 @@ int kcore_copy(const char *from_dir, const char *to_dir)
if (sz < 0 || sz > offset)
goto out_extract_close;
if (copy_bytes(kcore.fd, kci.kernel_map.offset, extract.fd, offset,
kci.kernel_map.len))
goto out_extract_close;
kcore_copy__for_each_phdr(&kci, p) {
off_t offs = p->rel + offset;
if (modules_offset && copy_bytes(kcore.fd, kci.modules_map.offset,
extract.fd, modules_offset,
kci.modules_map.len))
goto out_extract_close;
if (copy_bytes(kcore.fd, p->offset, extract.fd, offs, p->len))
goto out_extract_close;
}
if (kcore_copy__compare_file(from_dir, to_dir, "modules"))
goto out_extract_close;