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perf symbols: Factor out get_plt_sizes()

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Factor out get_plt_sizes() to make the code more readable and further
changes to dso__synthesize_plt_symbols() easier to follow.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20230120123456.12449-3-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter
2023-01-20 14:34:48 +02:00
committed by Arnaldo Carvalho de Melo
parent 1b69346e7a
commit c2d066c090
1 changed files with 28 additions and 26 deletions
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54
tools/perf/util/symbol-elf.c
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@@ -323,6 +323,33 @@ static char *demangle_sym(struct dso *dso, int kmodule, const char *elf_name)
return demangled;
}
static void get_plt_sizes(GElf_Ehdr *ehdr, GElf_Shdr *shdr_plt,
u64 *plt_header_size, u64 *plt_entry_size)
{
switch (ehdr->e_machine) {
case EM_ARM:
*plt_header_size = 20;
*plt_entry_size = 12;
return;
case EM_AARCH64:
*plt_header_size = 32;
*plt_entry_size = 16;
return;
case EM_SPARC:
*plt_header_size = 48;
*plt_entry_size = 12;
return;
case EM_SPARCV9:
*plt_header_size = 128;
*plt_entry_size = 32;
return;
default: /* FIXME: s390/alpha/mips/parisc/poperpc/sh/xtensa need to be checked */
*plt_header_size = shdr_plt->sh_entsize;
*plt_entry_size = shdr_plt->sh_entsize;
return;
}
}
#define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \
for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \
idx < nr_entries; \
@@ -411,32 +438,7 @@ int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss)
nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize;
plt_offset = shdr_plt.sh_offset;
switch (ehdr.e_machine) {
case EM_ARM:
plt_header_size = 20;
plt_entry_size = 12;
break;
case EM_AARCH64:
plt_header_size = 32;
plt_entry_size = 16;
break;
case EM_SPARC:
plt_header_size = 48;
plt_entry_size = 12;
break;
case EM_SPARCV9:
plt_header_size = 128;
plt_entry_size = 32;
break;
default: /* FIXME: s390/alpha/mips/parisc/poperpc/sh/xtensa need to be checked */
plt_header_size = shdr_plt.sh_entsize;
plt_entry_size = shdr_plt.sh_entsize;
break;
}
get_plt_sizes(&ehdr, &shdr_plt, &plt_header_size, &plt_entry_size);
plt_offset += plt_header_size;
if (shdr_rel_plt.sh_type == SHT_RELA) {