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x86-64: have value properly checked when resolving fixup

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Constants not known at the time an individual insn gets assembled and
going into a sign-extended field still shouldn't be silently truncated
at the time the respective fixup gets resolved.
This commit is contained in:
Jan Beulich
2021-04-26 10:35:51 +02:00
parent c290cb01fa
commit b818855549
5 changed files with 65 additions and 1 deletions
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8
gas/ChangeLog
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@ -1,3 +1,11 @@
2021-04-26 Jan Beulich <jbeulich@suse.com>
* config/tc-i386.c (md_apply_fix): Mark BFD_RELOC_X86_64_32S as
signed.
* testsuite/gas/i386/x86-64-addr32-bad.s,
testsuite/gas/i386/x86-64-addr32-bad.l: New.
* testsuite/gas/i386/i386.exp: Run new test.
2021-04-23 Eric Botcazou<ebotcazou@adacore.com>
* testsuite/gas/elf/section25.d: Run it everywhere.

13
gas/config/tc-i386.c
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@ -12576,7 +12576,18 @@ md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED)
/* Are we finished with this relocation now? */
if (fixP->fx_addsy == NULL)
fixP->fx_done = 1;
{
fixP->fx_done = 1;
switch (fixP->fx_r_type)
{
case BFD_RELOC_X86_64_32S:
fixP->fx_signed = 1;
break;
default:
break;
}
}
#if defined (OBJ_COFF) && defined (TE_PE)
else if (fixP->fx_addsy != NULL && S_IS_WEAK (fixP->fx_addsy))
{

1
gas/testsuite/gas/i386/i386.exp
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@ -750,6 +750,7 @@ if [gas_64_check] then {
run_dump_test "x86_64-intel"
run_dump_test "x86-64-addr32"
run_dump_test "x86-64-addr32-intel"
run_list_test "x86-64-addr32-bad" "-al"
run_dump_test "x86-64-opcode"
run_dump_test "x86-64-intel64"
if { ! [istarget "*-*-*cygwin*"] && ![istarget "*-*-mingw*"] } then {

29
gas/testsuite/gas/i386/x86-64-addr32-bad.l Normal file
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@ -0,0 +1,29 @@
.*: Assembler messages:
.*:3: Error:.* [0x]*88888888 .*
.*:7: Error:.* [0x]*99999999 .*
.*:11: Error:.* [0x]*99999999 .*
GAS LISTING .*
[ ]*[0-9]+[ ]+\.text
[ ]*[0-9]+[ ]+addr32:
[ ]*[0-9]+[ ]+lea 0x88888888\(%rax\), %rax
[ ]*[0-9]+[ ]+\?\?\?\? 8D808888[ ]+lea 0x88888888\(%rax\), %eax
[ ]*[0-9]+[ ]+8888
[ ]*[0-9]+[ ]+\?\?\?\? 67488D80[ ]+lea 0x88888888\(%eax\), %rax
[ ]*[0-9]+[ ]+88888888 *
[ ]*[0-9]+[ ]*
[ ]*[0-9]+[ ]+\?\?\?\? 488D8099[ ]+lea value\(%rax\), %rax
[ ]*[0-9]+[ ]+999999
[ ]*[0-9]+[ ]+\?\?\?\? 8D809999[ ]+lea value\(%rax\), %eax
[ ]*[0-9]+[ ]+9999
[ ]*[0-9]+[ ]+\?\?\?\? 67488D80[ ]+lea value\(%eax\), %rax
[ ]*[0-9]+[ ]+99999999 *
[ ]*[0-9]+[ ]*
[ ]*[0-9]+[ ]+\?\?\?\? 48C7C099[ ]+mov \$value, %rax
[ ]*[0-9]+[ ]+999999
[ ]*[0-9]+[ ]+\?\?\?\? B8999999[ ]+mov \$value, %eax
[ ]*[0-9]+[ ]+99
[ ]*[0-9]+[ ]*
[ ]*[0-9]+[ ]+\.equ value, 0x99999999
#pass

15
gas/testsuite/gas/i386/x86-64-addr32-bad.s Normal file
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@ -0,0 +1,15 @@
.text
addr32:
lea 0x88888888(%rax), %rax
lea 0x88888888(%rax), %eax
lea 0x88888888(%eax), %rax
lea value(%rax), %rax
lea value(%rax), %eax
lea value(%eax), %rax
mov $value, %rax
mov $value, %eax
.equ value, 0x99999999
.end