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Subject[PATCH V3 14/17] perf buildid-cache: kcore_copy: Iterate phdrs
Date
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>
---
tools/perf/util/symbol-elf.c | 25 ++++++++++---------------
1 file changed, 10 insertions(+), 15 deletions(-)

diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index 3e76a0efd15c..91b8cfb045ec 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -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;
--
1.9.1
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