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perf probe powerpc: Ignore SyS symbols irrespective of endianness

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This makes sure that the SyS symbols are ignored for any powerpc system,
not just the big endian ones.

Reported-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
Reviewed-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Fixes: fb6d594231 ("perf probe ppc: Use the right prefix when ignoring SyS symbols on ppc")
Link: http://lkml.kernel.org/r/20180828090848.1914-1-sandipan@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Sandipan Das 2018-08-28 14:38:48 +05:30 committed by Arnaldo Carvalho de Melo
parent c9f23d2bc2
commit fa694160cc
1 changed files with 3 additions and 1 deletions
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4
tools/perf/arch/powerpc/util/sym-handling.c
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@ -22,15 +22,16 @@ bool elf__needs_adjust_symbols(GElf_Ehdr ehdr)
#endif #endif
#if !defined(_CALL_ELF) || _CALL_ELF != 2
int arch__choose_best_symbol(struct symbol *syma, int arch__choose_best_symbol(struct symbol *syma,
struct symbol *symb __maybe_unused) struct symbol *symb __maybe_unused)
{ {
char *sym = syma->name; char *sym = syma->name;
#if !defined(_CALL_ELF) || _CALL_ELF != 2
/* Skip over any initial dot */ /* Skip over any initial dot */
if (*sym == '.') if (*sym == '.')
sym++; sym++;
#endif
/* Avoid "SyS" kernel syscall aliases */ /* Avoid "SyS" kernel syscall aliases */
if (strlen(sym) >= 3 && !strncmp(sym, "SyS", 3)) if (strlen(sym) >= 3 && !strncmp(sym, "SyS", 3))
@ -41,6 +42,7 @@ int arch__choose_best_symbol(struct symbol *syma,
return SYMBOL_A; return SYMBOL_A;
} }
#if !defined(_CALL_ELF) || _CALL_ELF != 2
/* Allow matching against dot variants */ /* Allow matching against dot variants */
int arch__compare_symbol_names(const char *namea, const char *nameb) int arch__compare_symbol_names(const char *namea, const char *nameb)
{ {