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fix misinterpretation of operand order in i386 CFI generation 

binary ops like ADD, AND, etc. modify the 2nd operand, not 1st.
This commit is contained in:
Alex Dowad 2015-10-13 13:28:50 +02:00 committed by Rich Felker
parent c82d3bada3
commit fef9c801fe
1 changed files with 5 additions and 5 deletions
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10
tools/add-cfi.i386.awk
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@ -185,12 +185,12 @@ function trashed(register) {
# this does NOT exhaustively check for all possible instructions which could
# overwrite a register value inherited from the caller (just the common ones)
/mov.*,%e(ax|bx|cx|dx|si|di|bp)/ { trashed(get_reg2()) }
/(add|addl|sub|subl|and|or|xor|lea|sal|sar|shl|shr) %e(ax|bx|cx|dx|si|di|bp),/ {
trashed(get_reg1())
/(add|addl|sub|subl|and|or|xor|lea|sal|sar|shl|shr).*,%e(ax|bx|cx|dx|si|di|bp)$/ {
trashed(get_reg2())
}
/^i?mul [^,]*$/ { 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_reg2()) }
/^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") }