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| author | Luis Machado <luis.machado@linaro.org> | 2020-06-15 15:44:20 -0300 |
|---|---|---|
| committer | Luis Machado <luis.machado@linaro.org> | 2021-03-24 14:56:07 -0300 |
| commit | cf44c9fa1b94837b093752854370b9c2db531264 (patch) | |
| tree | ce9e1af6df3ea2bca1d89937ec62dc4168c5aa00 /gdb/arch | |
| parent | b4a7d4fcfef4e0ca3c5de52efbaf33c1c98295eb (diff) | |
| download | binutils-gdb-cf44c9fa1b94837b093752854370b9c2db531264.tar.gz | |
AArch64: Report tag violation error information
Whenever a memory tag violation occurs, we get a SIGSEGV. Additional
information can be obtained through the siginfo data structure.
For AArch64 the Linux kernel may expose the fault address and tag
information, if we have a synchronous event. Otherwise there is
no fault address available.
The synchronous event looks like this:
--
(gdb) continue
Continuing.
Program received signal SIGSEGV, Segmentation fault
Memory tag violation while accessing address 0x0500fffff7ff8000
Allocation tag 0x1.
Logical tag 0x5
--
The asynchronous event looks like this:
--
(gdb) continue
Continuing.
Program received signal SIGSEGV, Segmentation fault
Memory tag violation
Fault address unavailable.
--
gdb/ChangeLog:
2021-03-24 Luis Machado <luis.machado@linaro.org>
* aarch64-linux-tdep.c
(aarch64_linux_report_signal_info): New function.
(aarch64_linux_init_abi): Register
aarch64_linux_report_signal_info as the report_signal_info hook.
* arch/aarch64-linux.h (SEGV_MTEAERR): Define.
(SEGV_MTESERR): Define.
Diffstat (limited to 'gdb/arch')
| -rw-r--r-- | gdb/arch/aarch64-mte-linux.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gdb/arch/aarch64-mte-linux.h b/gdb/arch/aarch64-mte-linux.h index f517638831c..2aa97eb861a 100644 --- a/gdb/arch/aarch64-mte-linux.h +++ b/gdb/arch/aarch64-mte-linux.h @@ -35,6 +35,12 @@ #define AARCH64_MTE_LOGICAL_TAG_START_BIT 56 #define AARCH64_MTE_LOGICAL_MAX_VALUE 0xf +/* Memory tagging definitions. */ +#ifndef SEGV_MTEAERR +# define SEGV_MTEAERR 8 +# define SEGV_MTESERR 9 +#endif + /* Memory tag types for AArch64. */ enum class aarch64_memtag_type { |