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| author | Jan Beulich <jbeulich@suse.com> | 2021-12-21 09:31:04 +0100 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2021-12-21 09:31:04 +0100 |
| commit | 47f4115a1b17f0918a484b935ffd0adcee1555a5 (patch) | |
| tree | 325d2d614a9afefdddffd8d6e83cbe31c38d460c /gas | |
| parent | ca988435c6138887721d705931abdecd4044f934 (diff) | |
| download | gdb-47f4115a1b17f0918a484b935ffd0adcee1555a5.zip gdb-47f4115a1b17f0918a484b935ffd0adcee1555a5.tar.gz gdb-47f4115a1b17f0918a484b935ffd0adcee1555a5.tar.bz2 | |
x86: -mfence-as-lock-add=yes doesn't work for 16-bit mode
Rather than trying to fix this (which would require making an assumption
on the upper half of %esp being zero), simply issue an error. While at
it, since the generated code is in conflict with -momit-lock-prefix=yes,
issue an error in that case as well.
Diffstat (limited to 'gas')
| -rw-r--r-- | gas/config/tc-i386.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index 9674ec4..dd12a0e 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -9632,7 +9632,12 @@ output_insn (void) { /* Encode lfence, mfence, and sfence as f0 83 04 24 00 lock addl $0x0, (%{re}sp). */ - if (now_seg != absolute_section) + if (flag_code == CODE_16BIT) + as_bad (_("Cannot convert `%s' in 16-bit mode"), i.tm.name); + else if (omit_lock_prefix) + as_bad (_("Cannot convert `%s' with `-momit-lock-prefix=yes' in effect"), + i.tm.name); + else if (now_seg != absolute_section) { offsetT val = 0x240483f0ULL; |