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| author | Nick Clifton <nickc@redhat.com> | 2019-10-29 10:01:27 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2019-10-29 10:01:27 +0000 |
| commit | 993a00a986d0795a3cbb7a2dd0c640d8e6d66734 (patch) | |
| tree | 1a1718c73f3356b40337e859b79adbfb109d190e /opcodes/ia64-opc.c | |
| parent | 66a66a17f489a4ffc614a31855e8d6f516e24640 (diff) | |
| download | gdb-993a00a986d0795a3cbb7a2dd0c640d8e6d66734.zip gdb-993a00a986d0795a3cbb7a2dd0c640d8e6d66734.tar.gz gdb-993a00a986d0795a3cbb7a2dd0c640d8e6d66734.tar.bz2 | |
Prevent a left shift by a negative value when disassembling IA64 binaries.
* ia64-opc.c (locate_opcode_ent): Prevent a negative shift when
locating the bit to be tested.
Diffstat (limited to 'opcodes/ia64-opc.c')
| -rw-r--r-- | opcodes/ia64-opc.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/opcodes/ia64-opc.c b/opcodes/ia64-opc.c index 5aa1198..ba60f8a 100644 --- a/opcodes/ia64-opc.c +++ b/opcodes/ia64-opc.c @@ -372,13 +372,16 @@ locate_opcode_ent (ia64_insn opcode, enum ia64_insn_type type) bitpos[currstatenum] = currbitnum; - /* Skip opval[0] bits in the instruction. */ + /* Skip opval[0] bits in the instruction. */ if (op & 0x40) { currbitnum -= opval[0]; } - /* The value of the current bit being tested. */ + if (currbitnum < 0) + currbitnum = 0; + + /* The value of the current bit being tested. */ currbit = opcode & (((ia64_insn) 1) << currbitnum) ? 1 : 0; next_op = -1; @@ -463,7 +466,7 @@ locate_opcode_ent (ia64_insn opcode, enum ia64_insn_type type) if (next_op > 65535) { - abort (); + return -1; } /* Run through the list of opcodes to check, trying to find |