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IBM zSystems: Accept (. - 0x100000000) PCRel32 operands

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as does not accept instructions like brasl %r0,.-0x100000000, because
of two problems with the generic overflow check:

1. PCRel32 operands are signed, but are treated as unsigned.

2. The allowed range for these operands is [-(1 << 32), (1 << 32) - 1],
   and not [-(1 << 31), (1 << 31) - 1].

Fix both by disabling the generic overflow check - it's not needed,
because s390_insert_operand () performs its own.

gas/

        * config/tc-s390.c (md_gather_operands): Set fx_no_overflow.
        * testsuite/gas/s390/s390.exp: Add zarch-z900-err.
        * testsuite/gas/s390/esa-z900.d: New test.
        * testsuite/gas/s390/esa-z900.s: New test.
        * testsuite/gas/s390/zarch-z900-err.l: New test.
        * testsuite/gas/s390/zarch-z900-err.s: New test.
This commit is contained in:
Ilya Leoshkevich
2022-05-09 21:57:28 +02:00
committed by Andreas Krebbel
parent 77399b5298
commit 0cfd6cffde
6 changed files with 26 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
gas/config/tc-s390.c
View File

@ -1619,6 +1619,7 @@ md_gather_operands (char *str,
md_apply_fix. */
for (i = 0; i < fc; i++)
{
fixS *fixP;
if (fixups[i].opindex < 0)
{
@ -1633,7 +1634,6 @@ md_gather_operands (char *str,
if (fixups[i].reloc != BFD_RELOC_UNUSED)
{
reloc_howto_type *reloc_howto;
fixS *fixP;
int size;
reloc_howto = bfd_reloc_type_lookup (stdoutput, fixups[i].reloc);
@ -1661,10 +1661,14 @@ md_gather_operands (char *str,
fixP->fx_pcrel_adjust = operand->shift / 8;
}
else
fix_new_exp (frag_now, f - frag_now->fr_literal, 4, &fixups[i].exp,
(operand->flags & S390_OPERAND_PCREL) != 0,
((bfd_reloc_code_real_type)
(fixups[i].opindex + (int) BFD_RELOC_UNUSED)));
fixP = fix_new_exp (frag_now, f - frag_now->fr_literal, 4,
&fixups[i].exp,
(operand->flags & S390_OPERAND_PCREL) != 0,
((bfd_reloc_code_real_type)
(fixups[i].opindex + (int) BFD_RELOC_UNUSED)));
/* s390_insert_operand () does the range checking. */
if (operand->flags & S390_OPERAND_PCREL)
fixP->fx_no_overflow = 1;
}
return str;
}

6
gas/testsuite/gas/s390/esa-z900.d
View File

@ -52,6 +52,10 @@ Disassembly of section .text:
.*: c0 f4 00 00 00 00 [ ]*jg 102 <foo\+0x102>
.*: c0 65 00 00 00 00 [ ]*brasl %r6,108 <foo\+0x108>
.*: c0 65 00 00 00 00 [ ]*brasl %r6,10e <foo\+0x10e>
.*: c0 65 80 00 00 00 [ ]*brasl %r6,114 <foo\+0x114>
.*: c0 65 80 00 00 00 [ ]*brasl %r6,11a <foo\+0x11a>
.*: c0 65 7f ff ff ff [ ]*brasl %r6,11e <foo\+0x11e>
.*: c0 65 7f ff ff ff [ ]*brasl %r6,124 <foo\+0x124>
.*: 01 0b [ ]*tam
.*: 01 0c [ ]*sam24
.*: 01 0d [ ]*sam31
@ -62,7 +66,7 @@ Disassembly of section .text:
.*: b9 97 00 69 [ ]*dlr %r6,%r9
.*: b9 98 00 69 [ ]*alcr %r6,%r9
.*: b9 99 00 69 [ ]*slbr %r6,%r9
.*: c0 60 00 00 00 00 [ ]*larl %r6,136 <foo\+0x136>
.*: c0 60 00 00 00 00 [ ]*larl %r6,14e <foo\+0x14e>
.*: e3 65 af ff 00 1e [ ]*lrv %r6,4095\(%r5,%r10\)
.*: e3 65 af ff 00 1f [ ]*lrvh %r6,4095\(%r5,%r10\)
.*: e3 65 af ff 00 3e [ ]*strv %r6,4095\(%r5,%r10\)

4
gas/testsuite/gas/s390/esa-z900.s
View File

@ -46,6 +46,10 @@ foo:
brul .
brasl %r6,.
jasl %r6,.
brasl %r6,.-0x100000000
jasl %r6,.-0x100000000
brasl %r6,.+0xfffffffe
jasl %r6,.+0xfffffffe
tam
sam24
sam31

1
gas/testsuite/gas/s390/s390.exp
View File

@ -20,6 +20,7 @@ if [expr [istarget "s390-*-*"] || [istarget "s390x-*-*"]] then {
# }
run_dump_test "zarch-z900" "{as -m64}"
run_list_test "zarch-z900-err" "-march=z900"
run_dump_test "zarch-z990" "{as -m64} {as -march=z990}"
run_list_test "zarch-z990-symbol-lay" "-m64 -march=z990"
run_dump_test "zarch-z9-109" "{as -m64} {as -march=z9-109}"

3
gas/testsuite/gas/s390/zarch-z900-err.l Normal file
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@ -0,0 +1,3 @@
.*: Assembler messages:
.*:3: Error: operand out of range \(fffffffefffffffe not between 0 and 4294967294\)
.*:4: Error: operand out of range \(0000000100000000 not between 0 and 4294967294\)

4
gas/testsuite/gas/s390/zarch-z900-err.s Normal file
View File

@ -0,0 +1,4 @@
.text
foo:
brasl %r6,.-0x100000002
brasl %r6,.+0x100000000