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authorDavid Daney <ddaney@avtrex.com>2008-09-23 03:11:26 -0400
committerRalf Baechle <ralf@linux-mips.org>2008-10-11 11:18:57 -0400
commit0926bf953ee79b8f139741b442e5a18520f81705 (patch)
tree5e2cbdb2060ec9324866e6a072d1d7666849445c /arch/mips/include/asm/ptrace.h
parent2c708cbaa6031b73be6b992adb3ec1811f91cdb1 (diff)
MIPS: Ptrace support for HARDWARE_WATCHPOINTS
This is the final part of the watch register patch. Here we hook up ptrace so that the user space debugger (gdb), can set and read the registers. Signed-off-by: David Daney <ddaney@avtrex.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/ptrace.h')
-rw-r--r--arch/mips/include/asm/ptrace.h46
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/mips/include/asm/ptrace.h b/arch/mips/include/asm/ptrace.h
index c00cca24dae0..cd5e8a47812b 100644
--- a/arch/mips/include/asm/ptrace.h
+++ b/arch/mips/include/asm/ptrace.h
@@ -74,11 +74,57 @@ struct pt_regs {
74#define PTRACE_POKEDATA_3264 0xc3 74#define PTRACE_POKEDATA_3264 0xc3
75#define PTRACE_GET_THREAD_AREA_3264 0xc4 75#define PTRACE_GET_THREAD_AREA_3264 0xc4
76 76
77/* Read and write watchpoint registers. */
78enum pt_watch_style {
79 pt_watch_style_mips32,
80 pt_watch_style_mips64
81};
82struct mips32_watch_regs {
83 uint32_t watchlo[8];
84 /* Lower 16 bits of watchhi. */
85 uint16_t watchhi[8];
86 /* Valid mask and I R W bits.
87 * bit 0 -- 1 if W bit is usable.
88 * bit 1 -- 1 if R bit is usable.
89 * bit 2 -- 1 if I bit is usable.
90 * bits 3 - 11 -- Valid watchhi mask bits.
91 */
92 uint16_t watch_masks[8];
93 /* The number of valid watch register pairs. */
94 uint32_t num_valid;
95} __attribute__((aligned(8)));
96
97struct mips64_watch_regs {
98 uint64_t watchlo[8];
99 uint16_t watchhi[8];
100 uint16_t watch_masks[8];
101 uint32_t num_valid;
102} __attribute__((aligned(8)));
103
104struct pt_watch_regs {
105 enum pt_watch_style style;
106 union {
107 struct mips32_watch_regs mips32;
108 struct mips32_watch_regs mips64;
109 };
110};
111
112#define PTRACE_GET_WATCH_REGS 0xd0
113#define PTRACE_SET_WATCH_REGS 0xd1
114
77#ifdef __KERNEL__ 115#ifdef __KERNEL__
78 116
117#include <linux/compiler.h>
79#include <linux/linkage.h> 118#include <linux/linkage.h>
80#include <asm/isadep.h> 119#include <asm/isadep.h>
81 120
121struct task_struct;
122
123extern int ptrace_get_watch_regs(struct task_struct *child,
124 struct pt_watch_regs __user *addr);
125extern int ptrace_set_watch_regs(struct task_struct *child,
126 struct pt_watch_regs __user *addr);
127
82/* 128/*
83 * Does the process account for user or for system time? 129 * Does the process account for user or for system time?
84 */ 130 */