diff options
Diffstat (limited to 'gdb')
| -rw-r--r-- | gdb/aarch64-linux-tdep.c | 54 | ||||
| -rw-r--r-- | gdb/arch/aarch64-mte-linux.h | 6 |
2 files changed, 60 insertions, 0 deletions
diff --git a/gdb/aarch64-linux-tdep.c b/gdb/aarch64-linux-tdep.c index 892977d..c8fccdd 100644 --- a/gdb/aarch64-linux-tdep.c +++ b/gdb/aarch64-linux-tdep.c @@ -1644,6 +1644,57 @@ aarch64_linux_memtag_to_string (struct gdbarch *gdbarch, return string_printf ("0x%s", phex_nz (tag, sizeof (tag))); } +/* AArch64 Linux implementation of the handle_segmentation_fault gdbarch + hook. Displays information about possible memory tag violations. */ + +static void +aarch64_linux_handle_segmentation_fault (struct gdbarch *gdbarch, + struct ui_out *uiout) +{ + CORE_ADDR fault_addr = 0; + long si_code = 0; + CORE_ADDR ltag; + CORE_ADDR atag; + + try + { + /* Sigcode tells us if the segfault is actually a memory tag + violation. */ + si_code = parse_and_eval_long ("$_siginfo.si_code\n"); + + fault_addr + = parse_and_eval_long ("$_siginfo._sifields._sigfault.si_addr"); + } + catch (const gdb_exception &exception) + { + return; + } + + /* If this is not a memory tag violation, just return. */ + if (si_code != SEGV_MTEAERR && si_code != SEGV_MTESERR) + return; + + uiout->text ("\n"); + + uiout->field_string ("sigcode-meaning", _("Memory tag violation")); + uiout->text (_(" while accessing address ")); + uiout->field_core_addr ("fault-addr", gdbarch, fault_addr); + uiout->text ("\n"); + + uiout->text (_("Logical tag ")); + ltag = aarch64_linux_get_ltag (fault_addr); + uiout->field_core_addr ("logical-tag", gdbarch, ltag); + uiout->text ("\n"); + + if (aarch64_linux_get_atag (fault_addr, &atag) != 0) + uiout->text (_("Allocation tag unavailable")); + else + { + uiout->text (_("Allocation tag ")); + uiout->field_core_addr ("allocation-tag", gdbarch, atag); + } +} + static void aarch64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { @@ -1724,6 +1775,9 @@ aarch64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) /* Register a hook for converting a memory tag to a string. */ set_gdbarch_memtag_to_string (gdbarch, aarch64_linux_memtag_to_string); + + set_gdbarch_handle_segmentation_fault (gdbarch, + aarch64_linux_handle_segmentation_fault); } /* Initialize the aarch64_linux_record_tdep. */ diff --git a/gdb/arch/aarch64-mte-linux.h b/gdb/arch/aarch64-mte-linux.h index 4ee6de3..79c662c 100644 --- a/gdb/arch/aarch64-mte-linux.h +++ b/gdb/arch/aarch64-mte-linux.h @@ -35,6 +35,12 @@ #define MTE_LOGICAL_TAG_START_BIT 56 #define MTE_LOGICAL_MAX_VALUE 0xf +/* Memory tagging definitions. */ +#ifndef SEGV_MTEAERR +# define SEGV_MTEAERR 8 +# define SEGV_MTESERR 9 +#endif + /* Return the number of tag granules in the memory range [ADDR, ADDR + LEN) given GRANULE_SIZE. */ extern int get_tag_granules (CORE_ADDR addr, size_t len, |