diff options
| author | David Daney <ddaney@avtrex.com> | 2008-09-23 09:11:26 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2008-10-11 17:18:57 +0200 |
| commit | 0926bf953ee79b8f139741b442e5a18520f81705 (patch) | |
| tree | 5e2cbdb2060ec9324866e6a072d1d7666849445c /arch/mips/include | |
| parent | MIPS: Scheduler support for HARDWARE_WATCHPOINTS. (diff) | |
| download | linux-0926bf953ee79b8f139741b442e5a18520f81705.tar.xz linux-0926bf953ee79b8f139741b442e5a18520f81705.zip | |
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')
| -rw-r--r-- | arch/mips/include/asm/ptrace.h | 46 |
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 { #define PTRACE_POKEDATA_3264 0xc3 #define PTRACE_GET_THREAD_AREA_3264 0xc4 +/* Read and write watchpoint registers. */ +enum pt_watch_style { + pt_watch_style_mips32, + pt_watch_style_mips64 +}; +struct mips32_watch_regs { + uint32_t watchlo[8]; + /* Lower 16 bits of watchhi. */ + uint16_t watchhi[8]; + /* Valid mask and I R W bits. + * bit 0 -- 1 if W bit is usable. + * bit 1 -- 1 if R bit is usable. + * bit 2 -- 1 if I bit is usable. + * bits 3 - 11 -- Valid watchhi mask bits. + */ + uint16_t watch_masks[8]; + /* The number of valid watch register pairs. */ + uint32_t num_valid; +} __attribute__((aligned(8))); + +struct mips64_watch_regs { + uint64_t watchlo[8]; + uint16_t watchhi[8]; + uint16_t watch_masks[8]; + uint32_t num_valid; +} __attribute__((aligned(8))); + +struct pt_watch_regs { + enum pt_watch_style style; + union { + struct mips32_watch_regs mips32; + struct mips32_watch_regs mips64; + }; +}; + +#define PTRACE_GET_WATCH_REGS 0xd0 +#define PTRACE_SET_WATCH_REGS 0xd1 + #ifdef __KERNEL__ +#include <linux/compiler.h> #include <linux/linkage.h> #include <asm/isadep.h> +struct task_struct; + +extern int ptrace_get_watch_regs(struct task_struct *child, + struct pt_watch_regs __user *addr); +extern int ptrace_set_watch_regs(struct task_struct *child, + struct pt_watch_regs __user *addr); + /* * Does the process account for user or for system time? */ |