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authorAnton Blanchard <anton@samba.org>2005-09-10 16:01:11 +1000
committerPaul Mackerras <paulus@samba.org>2005-09-12 17:19:12 +1000
commitfd9648dff6f9797ecc509bcd181706a274dc074d (patch)
tree845b99905dc4f54171d554c14e45b55f1cfe48e2 /include/asm-ppc64
parenta94d308513bdb2b926b45c11d7ce7fac6d6ca865 (diff)
[PATCH] ppc64: Add ptrace data breakpoint support
Add hardware data breakpoint support. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-ppc64')
-rw-r--r--include/asm-ppc64/hvcall.h6
-rw-r--r--include/asm-ppc64/plpar_wrappers.h9
-rw-r--r--include/asm-ppc64/processor.h1
-rw-r--r--include/asm-ppc64/ptrace-common.h20
-rw-r--r--include/asm-ppc64/system.h3
5 files changed, 39 insertions, 0 deletions
diff --git a/include/asm-ppc64/hvcall.h b/include/asm-ppc64/hvcall.h
index 4f668a4baff..ab7c3cf2488 100644
--- a/include/asm-ppc64/hvcall.h
+++ b/include/asm-ppc64/hvcall.h
@@ -56,6 +56,11 @@
#define H_PP1 (1UL<<(63-62))
#define H_PP2 (1UL<<(63-63))
+/* DABRX flags */
+#define H_DABRX_HYPERVISOR (1UL<<(63-61))
+#define H_DABRX_KERNEL (1UL<<(63-62))
+#define H_DABRX_USER (1UL<<(63-63))
+
/* pSeries hypervisor opcodes */
#define H_REMOVE 0x04
#define H_ENTER 0x08
@@ -101,6 +106,7 @@
#define H_VIO_SIGNAL 0x104
#define H_SEND_CRQ 0x108
#define H_COPY_RDMA 0x110
+#define H_SET_XDABR 0x134
#define H_STUFF_TCE 0x138
#define H_PUT_TCE_INDIRECT 0x13C
#define H_VTERM_PARTNER_INFO 0x150
diff --git a/include/asm-ppc64/plpar_wrappers.h b/include/asm-ppc64/plpar_wrappers.h
index f4a5fb7d67c..72dd2449ee7 100644
--- a/include/asm-ppc64/plpar_wrappers.h
+++ b/include/asm-ppc64/plpar_wrappers.h
@@ -107,5 +107,14 @@ static inline long plpar_put_term_char(unsigned long termno,
lbuf[1]);
}
+static inline long plpar_set_xdabr(unsigned long address, unsigned long flags)
+{
+ return plpar_hcall_norets(H_SET_XDABR, address, flags);
+}
+
+static inline long plpar_set_dabr(unsigned long val)
+{
+ return plpar_hcall_norets(H_SET_DABR, val);
+}
#endif /* _PPC64_PLPAR_WRAPPERS_H */
diff --git a/include/asm-ppc64/processor.h b/include/asm-ppc64/processor.h
index 8bd7aa95938..4146189006e 100644
--- a/include/asm-ppc64/processor.h
+++ b/include/asm-ppc64/processor.h
@@ -433,6 +433,7 @@ struct thread_struct {
unsigned long start_tb; /* Start purr when proc switched in */
unsigned long accum_tb; /* Total accumilated purr for process */
unsigned long vdso_base; /* base of the vDSO library */
+ unsigned long dabr; /* Data address breakpoint register */
#ifdef CONFIG_ALTIVEC
/* Complete AltiVec register set */
vector128 vr[32] __attribute((aligned(16)));
diff --git a/include/asm-ppc64/ptrace-common.h b/include/asm-ppc64/ptrace-common.h
index bd0f84c27bd..b1babb72967 100644
--- a/include/asm-ppc64/ptrace-common.h
+++ b/include/asm-ppc64/ptrace-common.h
@@ -13,6 +13,7 @@
#define _PPC64_PTRACE_COMMON_H
#include <linux/config.h>
+#include <asm/system.h>
/*
* Set of msr bits that gdb can change on behalf of a process.
@@ -141,4 +142,23 @@ static inline int set_vrregs(struct task_struct *task,
}
#endif
+static inline int ptrace_set_debugreg(struct task_struct *task,
+ unsigned long addr, unsigned long data)
+{
+ /* We only support one DABR and no IABRS at the moment */
+ if (addr > 0)
+ return -EINVAL;
+
+ /* The bottom 3 bits are flags */
+ if ((data & ~0x7UL) >= TASK_SIZE)
+ return -EIO;
+
+ /* Ensure translation is on */
+ if (data && !(data & DABR_TRANSLATION))
+ return -EIO;
+
+ task->thread.dabr = data;
+ return 0;
+}
+
#endif /* _PPC64_PTRACE_COMMON_H */
diff --git a/include/asm-ppc64/system.h b/include/asm-ppc64/system.h
index c0396428cc3..375015c62f2 100644
--- a/include/asm-ppc64/system.h
+++ b/include/asm-ppc64/system.h
@@ -101,6 +101,9 @@ static inline int debugger_dabr_match(struct pt_regs *regs) { return 0; }
static inline int debugger_fault_handler(struct pt_regs *regs) { return 0; }
#endif
+extern int set_dabr(unsigned long dabr);
+extern void _exception(int signr, struct pt_regs *regs, int code,
+ unsigned long addr);
extern int fix_alignment(struct pt_regs *regs);
extern void bad_page_fault(struct pt_regs *regs, unsigned long address,
int sig);