forked from pool/systemtap
40 lines
1.3 KiB
Diff
40 lines
1.3 KiB
Diff
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From: Jakub Jelinek <jakub@redhat.com>
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Date: Tue Mar 21 17:04:08 2017 -0400
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Subject: tweak i386 argument passing
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Git-commit: 272146660f54786bb61d388f6d3a4eb20e7d9369
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References: bsc#1030285
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Signed-off-by: Tony Jones <tonyj@suse.de>
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gcc PR80115: sys/sdt.h: tweak i386 argument passing
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Use %w[arg] to request that widened forms of register names be passed
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to the sys/sdt.h macro operand strings, so as to avoid nominating
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sub-registers such as %sil within -m32 code, which gcc <= 6 sometimes
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buggily did.
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diff --git a/includes/sys/sdt.h b/includes/sys/sdt.h
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index 3b7eda797..eff315bcd 100644
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--- a/includes/sys/sdt.h
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+++ b/includes/sys/sdt.h
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@@ -82,9 +82,11 @@
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# define _SDT_ASM_STRING_1(x) _SDT_ASM_1(.asciz #x)
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# define _SDT_ARGFMT(no) %n[_SDT_S##no]@_SDT_ARGTMPL(_SDT_A##no)
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+
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# ifndef STAP_SDT_ARG_CONSTRAINT
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# define STAP_SDT_ARG_CONSTRAINT nor
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# endif
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+
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# define _SDT_STRINGIFY(x) #x
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# define _SDT_ARG_CONSTRAINT_STRING(x) _SDT_STRINGIFY(x)
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# define _SDT_ARG(n, x) \
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@@ -173,6 +175,8 @@ __extension__ extern unsigned long long __sdt_unsp;
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#if defined __powerpc__ || defined __powerpc64__
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# define _SDT_ARGTMPL(id) %I[id]%[id]
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+#elif defined __i386__
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+# define _SDT_ARGTMPL(id) %w[id] /* gcc.gnu.org/PR80115 */
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#else
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# define _SDT_ARGTMPL(id) %[id]
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#endif
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