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| author | H.J. Lu <hjl.tools@gmail.com> | 2021-11-16 07:21:11 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2021-11-16 07:34:46 -0800 |
| commit | d7e3e627027fcf37d63e284144fe27ff4eba36b5 (patch) | |
| tree | 2d179da6a560fbb1f9bfe14a2f493e4954e7e889 /gas/config | |
| parent | 3b2934856f1370b320d8be5e1d4d82ef0c628f01 (diff) | |
| download | gdb-d7e3e627027fcf37d63e284144fe27ff4eba36b5.zip gdb-d7e3e627027fcf37d63e284144fe27ff4eba36b5.tar.gz gdb-d7e3e627027fcf37d63e284144fe27ff4eba36b5.tar.bz2 | |
x86: Don't allow KMOV in TLS code sequences
Don't allow KMOV in TLS code sequences which require integer MOV
instructions.
PR target/28595
* config/tc-i386.c (match_template): Don't allow KMOV in TLS
code sequences.
* testsuite/gas/i386/i386.exp: Run inval-tls and x86-64-inval-tls
tests.
* testsuite/gas/i386/inval-tls.l: New file.
* testsuite/gas/i386/inval-tls.s: Likewise.
* testsuite/gas/i386/x86-64-inval-tls.l: Likewise.
* testsuite/gas/i386/x86-64-inval-tls.s: Likewise.
Diffstat (limited to 'gas/config')
| -rw-r--r-- | gas/config/tc-i386.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index 320ea7e..9674ec4 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -6639,11 +6639,25 @@ match_template (char mnem_suffix) } } - /* Force 0x8b encoding for "mov foo@GOT, %eax". */ - if (i.reloc[0] == BFD_RELOC_386_GOT32 - && t->base_opcode == 0xa0 - && t->opcode_modifier.opcodespace == SPACE_BASE) - continue; + switch (i.reloc[0]) + { + case BFD_RELOC_386_GOT32: + /* Force 0x8b encoding for "mov foo@GOT, %eax". */ + if (t->base_opcode == 0xa0 + && t->opcode_modifier.opcodespace == SPACE_BASE) + continue; + break; + case BFD_RELOC_386_TLS_GOTIE: + case BFD_RELOC_386_TLS_LE_32: + case BFD_RELOC_X86_64_GOTTPOFF: + case BFD_RELOC_X86_64_TLSLD: + /* Don't allow KMOV in TLS code sequences. */ + if (t->opcode_modifier.vex) + continue; + break; + default: + break; + } /* We check register size if needed. */ if (t->opcode_modifier.checkregsize) |