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| author | Nick Clifton <nickc@redhat.com> | 2017-06-15 12:37:01 +0100 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2017-06-15 12:37:01 +0100 |
| commit | 63323b5b23bd83fa7b04ea00dff593c933e9b0e3 (patch) | |
| tree | 847e43e1cb1360659a92c2d8c04b4d29bcb73f88 /opcodes/rl78-decode.opc | |
| parent | 76800cba595efc3fe95a446c2d664e42ae4ee869 (diff) | |
| download | gdb-63323b5b23bd83fa7b04ea00dff593c933e9b0e3.zip gdb-63323b5b23bd83fa7b04ea00dff593c933e9b0e3.tar.gz gdb-63323b5b23bd83fa7b04ea00dff593c933e9b0e3.tar.bz2 | |
Fix address violation when disassembling a corrupt RL78 binary.
PR binutils/21588
* rl78-decode.opc (OP_BUF_LEN): Define.
(GETBYTE): Check for the index exceeding OP_BUF_LEN.
(rl78_decode_opcode): Use OP_BUF_LEN as the length of the op_buf
array.
* rl78-decode.c: Regenerate.
Diffstat (limited to 'opcodes/rl78-decode.opc')
| -rw-r--r-- | opcodes/rl78-decode.opc | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/opcodes/rl78-decode.opc b/opcodes/rl78-decode.opc index 6212f08..b25e441 100644 --- a/opcodes/rl78-decode.opc +++ b/opcodes/rl78-decode.opc @@ -50,7 +50,9 @@ typedef struct #define W() rl78->size = RL78_Word #define AU ATTRIBUTE_UNUSED -#define GETBYTE() (ld->op [ld->rl78->n_bytes++] = ld->getbyte (ld->ptr)) + +#define OP_BUF_LEN 20 +#define GETBYTE() (ld->rl78->n_bytes < (OP_BUF_LEN - 1) ? ld->op [ld->rl78->n_bytes++] = ld->getbyte (ld->ptr): 0) #define B ((unsigned long) GETBYTE()) #define SYNTAX(x) rl78->syntax = x @@ -168,7 +170,7 @@ rl78_decode_opcode (unsigned long pc AU, RL78_Dis_Isa isa) { LocalData lds, * ld = &lds; - unsigned char op_buf[20] = {0}; + unsigned char op_buf[OP_BUF_LEN] = {0}; unsigned char *op = op_buf; int op0, op1; |