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| author | Alex Coplan <alex.coplan@arm.com> | 2020-07-02 13:53:07 +0100 |
|---|---|---|
| committer | Alex Coplan <alex.coplan@arm.com> | 2020-07-02 13:53:07 +0100 |
| commit | f405494f214315091fb0864827b07b5e6f12ee84 (patch) | |
| tree | bf96219255effe72b24ec8217213a71f1a26908e | |
| parent | b1a35af2704842ff1a90626b0148c0fc93f995f6 (diff) | |
| download | gdb-f405494f214315091fb0864827b07b5e6f12ee84.zip gdb-f405494f214315091fb0864827b07b5e6f12ee84.tar.gz gdb-f405494f214315091fb0864827b07b5e6f12ee84.tar.bz2 | |
aarch64: Fix segfault on unicode symbols
This patch fixes a segfault which occurs when the AArch64 backend parses
a symbol operand that begins with a register name and ends with a
unicode byte (byte value > 127).
For example, the following input causes the crash:
x0é: udf x0é
gas/ChangeLog:
2020-07-02 Alex Coplan <alex.coplan@arm.com>
* config/tc-aarch64.c (reg_name_p): Fix cast so that we don't
segfault on negative chars.
* testsuite/gas/aarch64/reglike-label-unicode-segv.d: New test.
* testsuite/gas/aarch64/reglike-label-unicode-segv.s: Input.
| -rw-r--r-- | gas/ChangeLog | 7 | ||||
| -rw-r--r-- | gas/config/tc-aarch64.c | 2 | ||||
| -rw-r--r-- | gas/testsuite/gas/aarch64/reglike-label-unicode-segv.d | 8 | ||||
| -rw-r--r-- | gas/testsuite/gas/aarch64/reglike-label-unicode-segv.s | 2 |
4 files changed, 18 insertions, 1 deletions
diff --git a/gas/ChangeLog b/gas/ChangeLog index 864c6cd..c4b04f0 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,3 +1,10 @@ +2020-07-02 Alex Coplan <alex.coplan@arm.com> + + * config/tc-aarch64.c (reg_name_p): Fix cast so that we don't + segfault on negative chars. + * testsuite/gas/aarch64/reglike-label-unicode-segv.d: New test. + * testsuite/gas/aarch64/reglike-label-unicode-segv.s: Input. + 2020-07-02 Nick Clifton <nickc@redhat.com> PR 26028 diff --git a/gas/config/tc-aarch64.c b/gas/config/tc-aarch64.c index 728fd10..ecb15d2 100644 --- a/gas/config/tc-aarch64.c +++ b/gas/config/tc-aarch64.c @@ -2190,7 +2190,7 @@ reg_name_p (char *str, aarch64_reg_type reg_type) return FALSE; skip_whitespace (str); - if (*str == ',' || is_end_of_line[(unsigned int) *str]) + if (*str == ',' || is_end_of_line[(unsigned char) *str]) return TRUE; return FALSE; diff --git a/gas/testsuite/gas/aarch64/reglike-label-unicode-segv.d b/gas/testsuite/gas/aarch64/reglike-label-unicode-segv.d new file mode 100644 index 0000000..f262e6f --- /dev/null +++ b/gas/testsuite/gas/aarch64/reglike-label-unicode-segv.d @@ -0,0 +1,8 @@ +#objdump: -dr + +.*: file format .* + +Disassembly of section \.text: + +0+ <x0é>: +.*: 00000000 udf #0 diff --git a/gas/testsuite/gas/aarch64/reglike-label-unicode-segv.s b/gas/testsuite/gas/aarch64/reglike-label-unicode-segv.s new file mode 100644 index 0000000..18f1e92 --- /dev/null +++ b/gas/testsuite/gas/aarch64/reglike-label-unicode-segv.s @@ -0,0 +1,2 @@ +x0é: +udf x0é |