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authorAlex Dowad <alexinbeijing@gmail.com>2015-10-02 13:32:33 +0200
committerRich Felker <dalias@aerifal.cx>2015-10-08 21:04:41 +0000
commitdc97951402b499023ce877dd2438bce0840b2c26 (patch)
treefff46eb4e5ec75eaef6a26aaf412f1fea4e52075 /tools
parent0650a05947c9f67cedff693d2e1c2f61a8e6c0d3 (diff)
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fix instruction matching errors in i386 CFI generation
fdiv and fmul instructions were wrongly matched by the rules for integer div and mul instructions, leading to incorrect conclusions about register values being clobbered.
Diffstat (limited to 'tools')
-rw-r--r--tools/add-cfi.i386.awk6
1 files changed, 3 insertions, 3 deletions
diff --git a/tools/add-cfi.i386.awk b/tools/add-cfi.i386.awk
index b8bdd7f..5dc8794 100644
--- a/tools/add-cfi.i386.awk
+++ b/tools/add-cfi.i386.awk
@@ -188,9 +188,9 @@ function trashed(register) {
/(add|addl|sub|subl|and|or|xor|lea|sal|sar|shl|shr) %e(ax|bx|cx|dx|si|di|bp),/ {
trashed(get_reg1())
}
-/i?mul [^,]*$/ { trashed("eax"); trashed("edx") }
-/i?mul %e(ax|bx|cx|dx|si|di|bp),/ { trashed(get_reg1()) }
-/i?div/ { trashed("eax"); trashed("edx") }
+/^i?mul [^,]*$/ { trashed("eax"); trashed("edx") }
+/^i?mul %e(ax|bx|cx|dx|si|di|bp),/ { trashed(get_reg1()) }
+/^i?div/ { trashed("eax"); trashed("edx") }
/(dec|inc|not|neg|pop) %e(ax|bx|cx|dx|si|di|bp)/ { trashed(get_reg()) }
/cpuid/ { trashed("eax"); trashed("ebx"); trashed("ecx"); trashed("edx") }