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| author | Dave Kleikamp <shaggy@linux.vnet.ibm.com> | 2010-02-08 11:51:18 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-02-17 14:03:17 +1100 |
| commit | 3bffb6529cf10d48a97ac0d6d789986894c25c37 (patch) | |
| tree | 6e86d39604f753b0597374c31e4a2fba2a8d55f0 /arch/powerpc/kernel/signal_32.c | |
| parent | 99396ac105f54fe3584374c7c70a5cb6def766e6 (diff) | |
| download | lwn-3bffb6529cf10d48a97ac0d6d789986894c25c37.tar.gz lwn-3bffb6529cf10d48a97ac0d6d789986894c25c37.zip | |
powerpc/booke: Add support for advanced debug registers
powerpc/booke: Add support for advanced debug registers
From: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Based on patches originally written by Torez Smith.
This patch defines context switch and trap related functionality
for BookE specific Debug Registers. It adds support to ptrace()
for setting and getting BookE related Debug Registers
Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Cc: Torez Smith <lnxtorez@linux.vnet.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: David Gibson <dwg@au1.ibm.com>
Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Sergio Durigan Junior <sergiodj@br.ibm.com>
Cc: Thiago Jung Bauermann <bauerman@br.ibm.com>
Cc: linuxppc-dev list <Linuxppc-dev@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/signal_32.c')
| -rw-r--r-- | arch/powerpc/kernel/signal_32.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c index e4883ae36277..266610119f66 100644 --- a/arch/powerpc/kernel/signal_32.c +++ b/arch/powerpc/kernel/signal_32.c @@ -1092,8 +1092,12 @@ int sys_debug_setcontext(struct ucontext __user *ctx, new_msr |= MSR_DE; new_dbcr0 |= (DBCR0_IDM | DBCR0_IC); } else { - new_msr &= ~MSR_DE; - new_dbcr0 &= ~(DBCR0_IDM | DBCR0_IC); + new_dbcr0 &= ~DBCR0_IC; + if (!DBCR_ACTIVE_EVENTS(new_dbcr0, + current->thread.dbcr1)) { + new_msr &= ~MSR_DE; + new_dbcr0 &= ~DBCR0_IDM; + } } #else if (op.dbg_value) |