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authorKumar Gala <galak@kernel.crashing.org>2007-02-06 22:55:19 -0600
committerKumar Gala <galak@kernel.crashing.org>2007-02-06 22:55:19 -0600
commit8209003547c4b1006943eac8dc6c1fb6493cafda (patch)
tree37ed5742527d448f211c575fe714fe68846e0c40 /include/asm-powerpc
parent8423200553113cc031caa9b147f6150a8e26545c (diff)
[POWERPC] Added kprobes support to ppc32
Added kprobes to ppc32 platforms that have use single_step_exception. This excludes 4xx and anything Book-E since their debug mechanisms for single stepping are completely different. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'include/asm-powerpc')
-rw-r--r--include/asm-powerpc/kprobes.h7
-rw-r--r--include/asm-powerpc/sstep.h1
2 files changed, 7 insertions, 1 deletions
diff --git a/include/asm-powerpc/kprobes.h b/include/asm-powerpc/kprobes.h
index 2dafa376a63..3a5dd492588 100644
--- a/include/asm-powerpc/kprobes.h
+++ b/include/asm-powerpc/kprobes.h
@@ -44,6 +44,7 @@ typedef unsigned int kprobe_opcode_t;
#define IS_TDI(instr) (((instr) & 0xfc000000) == 0x08000000)
#define IS_TWI(instr) (((instr) & 0xfc000000) == 0x0c000000)
+#ifdef CONFIG_PPC64
/*
* 64bit powerpc uses function descriptors.
* Handle cases where:
@@ -67,9 +68,13 @@ typedef unsigned int kprobe_opcode_t;
}
#define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)((func_descr_t *)pentry)
-
#define is_trap(instr) (IS_TW(instr) || IS_TD(instr) || \
IS_TWI(instr) || IS_TDI(instr))
+#else
+/* Use stock kprobe_lookup_name since ppc32 doesn't use function descriptors */
+#define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)(pentry)
+#define is_trap(instr) (IS_TW(instr) || IS_TWI(instr))
+#endif
#define ARCH_SUPPORTS_KRETPROBES
#define ARCH_INACTIVE_KPROBE_COUNT 1
diff --git a/include/asm-powerpc/sstep.h b/include/asm-powerpc/sstep.h
index 630a9889c07..f593b0f9b62 100644
--- a/include/asm-powerpc/sstep.h
+++ b/include/asm-powerpc/sstep.h
@@ -21,6 +21,7 @@ struct pt_regs;
*/
#define IS_MTMSRD(instr) (((instr) & 0xfc0007be) == 0x7c000124)
#define IS_RFID(instr) (((instr) & 0xfc0007fe) == 0x4c000024)
+#define IS_RFI(instr) (((instr) & 0xfc0007fe) == 0x4c000064)
/* Emulate instructions that cause a transfer of control. */
extern int emulate_step(struct pt_regs *regs, unsigned int instr);