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author | Paul Mundt <lethal@linux-sh.org> | 2010-06-14 15:16:53 +0900 |
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committer | Paul Mundt <lethal@linux-sh.org> | 2010-06-14 15:16:53 +0900 |
commit | eaaaeef392cb245e415c31d480ed2d5a466fd88f (patch) | |
tree | 483761495ceb9cc3a277769f52d0ec8abeed1ac0 /arch/sh/kernel | |
parent | 9973e38575070b70c68bad177fb5056548fea349 (diff) | |
download | linux-stable-eaaaeef392cb245e415c31d480ed2d5a466fd88f.tar.gz linux-stable-eaaaeef392cb245e415c31d480ed2d5a466fd88f.tar.bz2 linux-stable-eaaaeef392cb245e415c31d480ed2d5a466fd88f.zip |
sh: Add kprobe-based event tracer.
This follows the x86/ppc changes for kprobe-based event tracing on sh.
While kprobes is only supported on 32-bit sh, we provide the API for
HAVE_REGS_AND_STACK_ACCESS_API for both 32 and 64-bit.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel')
-rw-r--r-- | arch/sh/kernel/Makefile | 2 | ||||
-rw-r--r-- | arch/sh/kernel/ptrace.c | 33 | ||||
-rw-r--r-- | arch/sh/kernel/ptrace_32.c | 27 | ||||
-rw-r--r-- | arch/sh/kernel/ptrace_64.c | 79 |
4 files changed, 140 insertions, 1 deletions
diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile index e25f3c69525d..1086ba1abdab 100644 --- a/arch/sh/kernel/Makefile +++ b/arch/sh/kernel/Makefile @@ -14,7 +14,7 @@ CFLAGS_REMOVE_return_address.o = -pg obj-y := clkdev.o debugtraps.o dma-nommu.o dumpstack.o \ idle.o io.o irq.o \ irq_$(BITS).o machvec.o nmi_debug.o process.o \ - process_$(BITS).o ptrace_$(BITS).o \ + process_$(BITS).o ptrace.o ptrace_$(BITS).o \ reboot.o return_address.o \ setup.o signal_$(BITS).o sys_sh.o sys_sh$(BITS).o \ syscalls_$(BITS).o time.o topology.o traps.o \ diff --git a/arch/sh/kernel/ptrace.c b/arch/sh/kernel/ptrace.c new file mode 100644 index 000000000000..0a05983633ca --- /dev/null +++ b/arch/sh/kernel/ptrace.c @@ -0,0 +1,33 @@ +#include <linux/ptrace.h> + +/** + * regs_query_register_offset() - query register offset from its name + * @name: the name of a register + * + * regs_query_register_offset() returns the offset of a register in struct + * pt_regs from its name. If the name is invalid, this returns -EINVAL; + */ +int regs_query_register_offset(const char *name) +{ + const struct pt_regs_offset *roff; + for (roff = regoffset_table; roff->name != NULL; roff++) + if (!strcmp(roff->name, name)) + return roff->offset; + return -EINVAL; +} + +/** + * regs_query_register_name() - query register name from its offset + * @offset: the offset of a register in struct pt_regs. + * + * regs_query_register_name() returns the name of a register from its + * offset in struct pt_regs. If the @offset is invalid, this returns NULL; + */ +const char *regs_query_register_name(unsigned int offset) +{ + const struct pt_regs_offset *roff; + for (roff = regoffset_table; roff->name != NULL; roff++) + if (roff->offset == offset) + return roff->name; + return NULL; +} diff --git a/arch/sh/kernel/ptrace_32.c b/arch/sh/kernel/ptrace_32.c index 6c4bbba2a675..2cd42b58cb20 100644 --- a/arch/sh/kernel/ptrace_32.c +++ b/arch/sh/kernel/ptrace_32.c @@ -274,6 +274,33 @@ static int dspregs_active(struct task_struct *target, } #endif +const struct pt_regs_offset regoffset_table[] = { + REGS_OFFSET_NAME(0), + REGS_OFFSET_NAME(1), + REGS_OFFSET_NAME(2), + REGS_OFFSET_NAME(3), + REGS_OFFSET_NAME(4), + REGS_OFFSET_NAME(5), + REGS_OFFSET_NAME(6), + REGS_OFFSET_NAME(7), + REGS_OFFSET_NAME(8), + REGS_OFFSET_NAME(9), + REGS_OFFSET_NAME(10), + REGS_OFFSET_NAME(11), + REGS_OFFSET_NAME(12), + REGS_OFFSET_NAME(13), + REGS_OFFSET_NAME(14), + REGS_OFFSET_NAME(15), + REG_OFFSET_NAME(pc), + REG_OFFSET_NAME(pr), + REG_OFFSET_NAME(sr), + REG_OFFSET_NAME(gbr), + REG_OFFSET_NAME(mach), + REG_OFFSET_NAME(macl), + REG_OFFSET_NAME(tra), + REG_OFFSET_END, +}; + /* * These are our native regset flavours. */ diff --git a/arch/sh/kernel/ptrace_64.c b/arch/sh/kernel/ptrace_64.c index 5fd644da7f02..b97817016b6a 100644 --- a/arch/sh/kernel/ptrace_64.c +++ b/arch/sh/kernel/ptrace_64.c @@ -252,6 +252,85 @@ static int fpregs_active(struct task_struct *target, } #endif +const struct pt_regs_offset regoffset_table[] = { + REG_OFFSET_NAME(pc), + REG_OFFSET_NAME(sr), + REG_OFFSET_NAME(syscall_nr), + REGS_OFFSET_NAME(0), + REGS_OFFSET_NAME(1), + REGS_OFFSET_NAME(2), + REGS_OFFSET_NAME(3), + REGS_OFFSET_NAME(4), + REGS_OFFSET_NAME(5), + REGS_OFFSET_NAME(6), + REGS_OFFSET_NAME(7), + REGS_OFFSET_NAME(8), + REGS_OFFSET_NAME(9), + REGS_OFFSET_NAME(10), + REGS_OFFSET_NAME(11), + REGS_OFFSET_NAME(12), + REGS_OFFSET_NAME(13), + REGS_OFFSET_NAME(14), + REGS_OFFSET_NAME(15), + REGS_OFFSET_NAME(16), + REGS_OFFSET_NAME(17), + REGS_OFFSET_NAME(18), + REGS_OFFSET_NAME(19), + REGS_OFFSET_NAME(20), + REGS_OFFSET_NAME(21), + REGS_OFFSET_NAME(22), + REGS_OFFSET_NAME(23), + REGS_OFFSET_NAME(24), + REGS_OFFSET_NAME(25), + REGS_OFFSET_NAME(26), + REGS_OFFSET_NAME(27), + REGS_OFFSET_NAME(28), + REGS_OFFSET_NAME(29), + REGS_OFFSET_NAME(30), + REGS_OFFSET_NAME(31), + REGS_OFFSET_NAME(32), + REGS_OFFSET_NAME(33), + REGS_OFFSET_NAME(34), + REGS_OFFSET_NAME(35), + REGS_OFFSET_NAME(36), + REGS_OFFSET_NAME(37), + REGS_OFFSET_NAME(38), + REGS_OFFSET_NAME(39), + REGS_OFFSET_NAME(40), + REGS_OFFSET_NAME(41), + REGS_OFFSET_NAME(42), + REGS_OFFSET_NAME(43), + REGS_OFFSET_NAME(44), + REGS_OFFSET_NAME(45), + REGS_OFFSET_NAME(46), + REGS_OFFSET_NAME(47), + REGS_OFFSET_NAME(48), + REGS_OFFSET_NAME(49), + REGS_OFFSET_NAME(50), + REGS_OFFSET_NAME(51), + REGS_OFFSET_NAME(52), + REGS_OFFSET_NAME(53), + REGS_OFFSET_NAME(54), + REGS_OFFSET_NAME(55), + REGS_OFFSET_NAME(56), + REGS_OFFSET_NAME(57), + REGS_OFFSET_NAME(58), + REGS_OFFSET_NAME(59), + REGS_OFFSET_NAME(60), + REGS_OFFSET_NAME(61), + REGS_OFFSET_NAME(62), + REGS_OFFSET_NAME(63), + TREGS_OFFSET_NAME(0), + TREGS_OFFSET_NAME(1), + TREGS_OFFSET_NAME(2), + TREGS_OFFSET_NAME(3), + TREGS_OFFSET_NAME(4), + TREGS_OFFSET_NAME(5), + TREGS_OFFSET_NAME(6), + TREGS_OFFSET_NAME(7), + REG_OFFSET_END, +}; + /* * These are our native regset flavours. */ |