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perf kcore_copy: Layout sections 

In preparation to add more program headers, layout the relative offset
of each section.

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/1526986485-6562-14-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 13:54:41 +03:00 committed by Arnaldo Carvalho de Melo
parent c9dd1d8949
commit 15acef6c37
1 changed files with 22 additions and 3 deletions
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25
tools/perf/util/symbol-elf.c
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@ -1386,6 +1386,7 @@ static off_t kcore__write(struct kcore *kcore)
struct phdr_data {
off_t offset;
off_t rel;
u64 addr;
u64 len;
struct list_head node;
@ -1404,6 +1405,9 @@ struct kcore_copy_info {
struct list_head phdrs;
};
#define kcore_copy__for_each_phdr(k, p) \
list_for_each_entry((p), &(k)->phdrs, node)
static int kcore_copy__process_kallsyms(void *arg, const char *name, char type,
u64 start)
{
@ -1518,11 +1522,21 @@ static int kcore_copy__read_maps(struct kcore_copy_info *kci, Elf *elf)
if (kci->modules_map.len)
list_add_tail(&kci->modules_map.node, &kci->phdrs);
kci->phnum = !!kci->kernel_map.len + !!kci->modules_map.len;
return 0;
}
static void kcore_copy__layout(struct kcore_copy_info *kci)
{
struct phdr_data *p;
off_t rel = 0;
kcore_copy__for_each_phdr(kci, p) {
p->rel = rel;
rel += p->len;
kci->phnum += 1;
}
}
static int kcore_copy__calc_maps(struct kcore_copy_info *kci, const char *dir,
Elf *elf)
{
@ -1558,7 +1572,12 @@ static int kcore_copy__calc_maps(struct kcore_copy_info *kci, const char *dir,
if (kci->first_module && !kci->last_module_symbol)
return -1;
return kcore_copy__read_maps(kci, elf);
if (kcore_copy__read_maps(kci, elf))
return -1;
kcore_copy__layout(kci);
return 0;
}
static int kcore_copy__copy_file(const char *from_dir, const char *to_dir,