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authorMaciej W. Rozycki <macro@imgtec.com>2016-12-23 12:37:40 +0000
committerMaciej W. Rozycki <macro@imgtec.com>2016-12-23 19:25:44 +0000
commit645c455650ed35460afdacb078c7c58308607fbe (patch)
treed66a2dabbdab362351439a0c92503d0b01543d54 /opcodes
parent9e76c212e6311abaee4d02473473f7d6dcad972f (diff)
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MIPS16/GAS: Disallow EXTEND delay-slot scheduling
Do not allow any explicitly coded EXTEND instruction to be automatically scheduled into a jump delay slot, as an EXTEND prefix is coupled with the next regular MIPS16 instruction and therefore swapping it with a jump would change program's semantics; EXTEND is not architecturally allowed to be present in a jump delay slot anyway. opcodes/ * mips16-opc.c (mips16_opcodes): Set NODS in `pinfo' for "extend". gas/ * testsuite/gas/mips/mips16-extend-swap.d: New test. * testsuite/gas/mips/mips16-extend-swap.s: New test source. * testsuite/gas/mips/mips.exp: Run the new test.
Diffstat (limited to 'opcodes')
-rw-r--r--opcodes/ChangeLog5
-rw-r--r--opcodes/mips16-opc.c2
2 files changed, 6 insertions, 1 deletions
diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index 9938992..5166be4 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,5 +1,10 @@
2016-12-23 Maciej W. Rozycki <macro@imgtec.com>
+ * mips16-opc.c (mips16_opcodes): Set NODS in `pinfo' for
+ "extend".
+
+2016-12-23 Maciej W. Rozycki <macro@imgtec.com>
+
* mips-dis.c (set_default_mips_dis_options): Use
HAVE_BFD_MIPS_ELF_GET_ABIFLAGS rather than BFD64 to guard the
call to `bfd_mips_elf_get_abiflags'.
diff --git a/opcodes/mips16-opc.c b/opcodes/mips16-opc.c
index 758b78f..7d430dd 100644
--- a/opcodes/mips16-opc.c
+++ b/opcodes/mips16-opc.c
@@ -357,7 +357,7 @@ const struct mips_opcode mips16_opcodes[] =
{"zew", "x", 0xe851, 0xf8ff, MOD_1, 0, I64, 0, 0 },
/* Place EXTEND last so that it catches any prefix that didn't match
anything. */
-{"extend", "e", 0xf000, 0xf800, 0, 0, I1, 0, 0 },
+{"extend", "e", 0xf000, 0xf800, NODS, 0, I1, 0, 0 },
};
const int bfd_mips16_num_opcodes =