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| author | Alan Modra <amodra@gmail.com> | 2019-12-10 19:09:47 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2019-12-11 11:37:25 +1030 |
| commit | a11db3e9f3a679601f41671a9e7f54c37f2c5073 (patch) | |
| tree | 39fd64660e6dce076b332d9ba2e73f974b7fb131 /opcodes | |
| parent | 9d48687b41f17ccbd7c61dd76b96147f28916951 (diff) | |
| download | gdb-a11db3e9f3a679601f41671a9e7f54c37f2c5073.zip gdb-a11db3e9f3a679601f41671a9e7f54c37f2c5073.tar.gz gdb-a11db3e9f3a679601f41671a9e7f54c37f2c5073.tar.bz2 | |
ubsan: arc: shift exponent 32 is too large for 32-bit type 'int'
When operand->bits is 32, the following results in UB.
value = (insn >> operand->shift) & ((1 << operand->bits) - 1);
* arc-dis.c (find_format_from_table): Use ull constant when
shifting by up to 32.
Diffstat (limited to 'opcodes')
| -rw-r--r-- | opcodes/ChangeLog | 5 | ||||
| -rw-r--r-- | opcodes/arc-dis.c | 2 |
2 files changed, 6 insertions, 1 deletions
diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog index 3460b3e..d3f1e69 100644 --- a/opcodes/ChangeLog +++ b/opcodes/ChangeLog @@ -1,5 +1,10 @@ 2019-12-11 Alan Modra <amodra@gmail.com> + * arc-dis.c (find_format_from_table): Use ull constant when + shifting by up to 32. + +2019-12-11 Alan Modra <amodra@gmail.com> + PR 25270 * aarch64-dis.c (aarch64_decode_variant_using_iclass): Return false when field is zero for sve_size_tsz_bhs. diff --git a/opcodes/arc-dis.c b/opcodes/arc-dis.c index 3c88c33..a038fa0 100644 --- a/opcodes/arc-dis.c +++ b/opcodes/arc-dis.c @@ -295,7 +295,7 @@ find_format_from_table (struct disassemble_info *info, if (operand->extract) value = (*operand->extract) (insn, &invalid); else - value = (insn >> operand->shift) & ((1 << operand->bits) - 1); + value = (insn >> operand->shift) & ((1ull << operand->bits) - 1); /* Check for LIMM indicator. If it is there, then make sure we pick the right format. */ |