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| author | Ulrich Weigand <uweigand@de.ibm.com> | 2013-07-22 13:17:51 +0000 |
|---|---|---|
| committer | Ulrich Weigand <uweigand@de.ibm.com> | 2013-07-22 13:17:51 +0000 |
| commit | 0a92edeb05bdec32c5e3bbeb7917929ca018566c (patch) | |
| tree | e64e17ae70da31db42955f26e5002394a3ffee98 /gdb/ppc-linux-nat.c | |
| parent | a36e82dffcdbe02f81bcd962fa5433a131beaad1 (diff) | |
| download | gdb-0a92edeb05bdec32c5e3bbeb7917929ca018566c.tar.gz | |
2013-07-22 Edjunior Barbosa Machado <emachado@linux.vnet.ibm.com>
* ppc-linux-nat.c (PPC_DEBUG_FEATURE_DATA_BP_DAWR): New define.
(ppc_linux_region_ok_for_hw_watchpoint): Add checking to use the new
DAWR interface for longer ranges hardware watchpoint (up to 512 bytes).
Diffstat (limited to 'gdb/ppc-linux-nat.c')
| -rw-r--r-- | gdb/ppc-linux-nat.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/gdb/ppc-linux-nat.c b/gdb/ppc-linux-nat.c index 4b3c78c7ac0..1f3f080f942 100644 --- a/gdb/ppc-linux-nat.c +++ b/gdb/ppc-linux-nat.c @@ -177,7 +177,11 @@ struct ppc_hw_breakpoint (1<<((n)+PPC_BREAKPOINT_CONDITION_BE_SHIFT)) #endif /* PPC_PTRACE_GETHWDBGINFO */ - +/* Feature defined on Linux kernel v3.9: DAWR interface, that enables wider + watchpoint (up to 512 bytes). */ +#ifndef PPC_DEBUG_FEATURE_DATA_BP_DAWR +#define PPC_DEBUG_FEATURE_DATA_BP_DAWR 0x10 +#endif /* PPC_DEBUG_FEATURE_DATA_BP_DAWR */ /* Similarly for the general-purpose (gp0 -- gp31) and floating-point registers (fp0 -- fp31). */ @@ -1504,6 +1508,7 @@ ppc_linux_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) watchpoints. */ if (have_ptrace_hwdebug_interface ()) { + int region_size; /* Embedded DAC-based processors, like the PowerPC 440 have ranged watchpoints and can watch any access within an arbitrary memory region. This is useful to watch arrays and structs, for instance. It @@ -1512,11 +1517,17 @@ ppc_linux_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) && hwdebug_info.features & PPC_DEBUG_FEATURE_DATA_BP_RANGE && ppc_linux_get_hwcap () & PPC_FEATURE_BOOKE) return 2; + /* Check if the processor provides DAWR interface. */ + if (hwdebug_info.features & PPC_DEBUG_FEATURE_DATA_BP_DAWR) + /* DAWR interface allows to watch up to 512 byte wide ranges which + can't cross a 512 byte boundary. */ + region_size = 512; + else + region_size = hwdebug_info.data_bp_alignment; /* Server processors provide one hardware watchpoint and addr+len should fall in the watchable region provided by the ptrace interface. */ - if (hwdebug_info.data_bp_alignment - && (addr + len > (addr & ~(hwdebug_info.data_bp_alignment - 1)) - + hwdebug_info.data_bp_alignment)) + if (region_size + && (addr + len > (addr & ~(region_size - 1)) + region_size)) return 0; } /* addr+len must fall in the 8 byte watchable region for DABR-based |