- patches.arch/x86_mce_intel_decode_physical_address.patch:

[linux-flexiantxendom0-3.2.10.git] / arch / powerpc / kernel / ptrace.c

diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index ed2cfe1..7a0c019 100644 (file)
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -39,6 +39,109 @@
 #include <asm/system.h>
 
 /*
+ * The parameter save area on the stack is used to store arguments being passed
+ * to callee function and is located at fixed offset from stack pointer.
+ */
+#ifdef CONFIG_PPC32
+#define PARAMETER_SAVE_AREA_OFFSET     24  /* bytes */
+#else /* CONFIG_PPC32 */
+#define PARAMETER_SAVE_AREA_OFFSET     48  /* bytes */
+#endif
+
+struct pt_regs_offset {
+       const char *name;
+       int offset;
+};
+
+#define STR(s) #s                      /* convert to string */
+#define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
+#define GPR_OFFSET_NAME(num)   \
+       {.name = STR(gpr##num), .offset = offsetof(struct pt_regs, gpr[num])}
+#define REG_OFFSET_END {.name = NULL, .offset = 0}
+
+static const struct pt_regs_offset regoffset_table[] = {
+       GPR_OFFSET_NAME(0),
+       GPR_OFFSET_NAME(1),
+       GPR_OFFSET_NAME(2),
+       GPR_OFFSET_NAME(3),
+       GPR_OFFSET_NAME(4),
+       GPR_OFFSET_NAME(5),
+       GPR_OFFSET_NAME(6),
+       GPR_OFFSET_NAME(7),
+       GPR_OFFSET_NAME(8),
+       GPR_OFFSET_NAME(9),
+       GPR_OFFSET_NAME(10),
+       GPR_OFFSET_NAME(11),
+       GPR_OFFSET_NAME(12),
+       GPR_OFFSET_NAME(13),
+       GPR_OFFSET_NAME(14),
+       GPR_OFFSET_NAME(15),
+       GPR_OFFSET_NAME(16),
+       GPR_OFFSET_NAME(17),
+       GPR_OFFSET_NAME(18),
+       GPR_OFFSET_NAME(19),
+       GPR_OFFSET_NAME(20),
+       GPR_OFFSET_NAME(21),
+       GPR_OFFSET_NAME(22),
+       GPR_OFFSET_NAME(23),
+       GPR_OFFSET_NAME(24),
+       GPR_OFFSET_NAME(25),
+       GPR_OFFSET_NAME(26),
+       GPR_OFFSET_NAME(27),
+       GPR_OFFSET_NAME(28),
+       GPR_OFFSET_NAME(29),
+       GPR_OFFSET_NAME(30),
+       GPR_OFFSET_NAME(31),
+       REG_OFFSET_NAME(nip),
+       REG_OFFSET_NAME(msr),
+       REG_OFFSET_NAME(ctr),
+       REG_OFFSET_NAME(link),
+       REG_OFFSET_NAME(xer),
+       REG_OFFSET_NAME(ccr),
+#ifdef CONFIG_PPC64
+       REG_OFFSET_NAME(softe),
+#else
+       REG_OFFSET_NAME(mq),
+#endif
+       REG_OFFSET_NAME(trap),
+       REG_OFFSET_NAME(dar),
+       REG_OFFSET_NAME(dsisr),
+       REG_OFFSET_END,
+};
+
+/**
+ * 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;
+}
+
+/*
  * does not yet catch signals sent when the child dies.
  * in exit.c or in signal.c.
  */