linux_dsm_epyc7002/tools/perf/bench/mem-memset-x86-64-asm.S

#define memset MEMSET /* don't hide glibc's memset() */
#define altinstr_replacement text
#define globl p2align 4; .globl
#define Lmemset_c globl memset_c; memset_c
#define Lmemset_c_e globl memset_c_e; memset_c_e
#include "../../../arch/x86/lib/memset_64.S"

/*
 * We need to provide note.GNU-stack section, saying that we want
 * NOT executable stack. Otherwise the final linking will assume that
 * the ELF stack should not be restricted at all and set it RWX.
 */
.section .note.GNU-stack,"",@progbits
perf bench: Also allow measuring memset() This simply clones the respective memcpy() implementation. Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/4F16D743020000780006D735@nat28.tlf.novell.com Signed-off-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2012-01-24 19:03:22 +07:00			`#define memset MEMSET /* don't hide glibc's memset() */`
			`#define altinstr_replacement text`
			`#define globl p2align 4; .globl`
			`#define Lmemset_c globl memset_c; memset_c`
			`#define Lmemset_c_e globl memset_c_e; memset_c_e`
			`#include "../../../arch/x86/lib/memset_64.S"`
perf tool: Fix perf stack to non executable on x86_64 By adding following objects: bench/mem-memset-x86-64-asm.o bench/mem-memcpy-x86-64-asm.o the x86_64 perf binary ended up with executable stack. The reason was that above objects are assembler sourced and are missing the GNU-stack note section. In such case the linker assumes that the final binary should not be restricted at all and mark the stack as RWX. Adding section ".note.GNU-stack" definition to mentioned objects, with all flags disabled, thus omiting those objects from linker stack flags decision. Reported-at: https://bugzilla.redhat.com/show_bug.cgi?id=783570 Reported-by: Clark Williams <williams@redhat.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1328100848-5630-1-git-send-email-jolsa@redhat.com Signed-off-by: Jiri Olsa <jolsa@redhat.com> [ committer note: Remaining bits after what was already added to perf/urgent ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2012-02-01 19:54:08 +07:00
			`/*`
			`* We need to provide note.GNU-stack section, saying that we want`
			`* NOT executable stack. Otherwise the final linking will assume that`
			`* the ELF stack should not be restricted at all and set it RWX.`
			`*/`
			`.section .note.GNU-stack,"",@progbits`