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| author | Nick Clifton <nickc@redhat.com> | 2017-12-18 09:37:57 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2017-12-18 09:37:57 +0000 |
| commit | 4f588891ac7d4653e1bd861ca38c2a4e6d5e907c (patch) | |
| tree | f37a43a04dfa2b20388ce554499466c17c70c725 | |
| parent | 10c17abdd052c5f8f9c2bcdf8b01dffe5d06baf0 (diff) | |
| download | gdb-4f588891ac7d4653e1bd861ca38c2a4e6d5e907c.zip gdb-4f588891ac7d4653e1bd861ca38c2a4e6d5e907c.tar.gz gdb-4f588891ac7d4653e1bd861ca38c2a4e6d5e907c.tar.bz2 | |
Resolve PR 22493 - the encoding to be used when pushing the stack pointer onto the stack.
PR 22493
* config/tc-arm.c (encode_ldmstm): Do not use A2 encoding of the
PUSH insn when pushing the stack pointer.
| -rw-r--r-- | gas/ChangeLog | 6 | ||||
| -rw-r--r-- | gas/config/tc-arm.c | 5 |
2 files changed, 11 insertions, 0 deletions
diff --git a/gas/ChangeLog b/gas/ChangeLog index d495548..ed794be 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,3 +1,9 @@ +2017-12-18 Nick Clifton <nickc@redhat.com> + + PR 22493 + * config/tc-arm.c (encode_ldmstm): Do not use A2 encoding of the + PUSH insn when pushing the stack pointer. + 2017-12-18 Jan Beulich <jbeulich@suse.com> * config/tc-i386.c (regymm, regzmm): Delete. diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c index 080e4da..c12a453 100644 --- a/gas/config/tc-arm.c +++ b/gas/config/tc-arm.c @@ -8908,6 +8908,11 @@ encode_ldmstm(int from_push_pop_mnem) { int is_push = (inst.instruction & A_PUSH_POP_OP_MASK) == A1_OPCODE_PUSH; + if (is_push && one_reg == 13 /* SP */) + /* PR 22483: The A2 encoding cannot be used when + pushing the stack pointer as this is UNPREDICTABLE. */ + return; + inst.instruction &= A_COND_MASK; inst.instruction |= is_push ? A2_OPCODE_PUSH : A2_OPCODE_POP; inst.instruction |= one_reg << 12; |