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-rw-r--r--arch/sparc/kernel/ptrace_64.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/sparc/kernel/ptrace_64.c b/arch/sparc/kernel/ptrace_64.c
index ac082dd8c67d..96494b2ef41f 100644
--- a/arch/sparc/kernel/ptrace_64.c
+++ b/arch/sparc/kernel/ptrace_64.c
@@ -46,6 +46,43 @@
/* #define ALLOW_INIT_TRACING */
+struct pt_regs_offset {
+ const char *name;
+ int offset;
+};
+
+#define REG_OFFSET_NAME(n, r) \
+ {.name = n, .offset = (PT_V9_##r)}
+#define REG_OFFSET_END {.name = NULL, .offset = 0}
+
+static const struct pt_regs_offset regoffset_table[] = {
+ REG_OFFSET_NAME("g0", G0),
+ REG_OFFSET_NAME("g1", G1),
+ REG_OFFSET_NAME("g2", G2),
+ REG_OFFSET_NAME("g3", G3),
+ REG_OFFSET_NAME("g4", G4),
+ REG_OFFSET_NAME("g5", G5),
+ REG_OFFSET_NAME("g6", G6),
+ REG_OFFSET_NAME("g7", G7),
+
+ REG_OFFSET_NAME("i0", I0),
+ REG_OFFSET_NAME("i1", I1),
+ REG_OFFSET_NAME("i2", I2),
+ REG_OFFSET_NAME("i3", I3),
+ REG_OFFSET_NAME("i4", I4),
+ REG_OFFSET_NAME("i5", I5),
+ REG_OFFSET_NAME("i6", I6),
+ REG_OFFSET_NAME("i7", I7),
+
+ REG_OFFSET_NAME("tstate", TSTATE),
+ REG_OFFSET_NAME("pc", TPC),
+ REG_OFFSET_NAME("npc", TNPC),
+ REG_OFFSET_NAME("y", Y),
+ REG_OFFSET_NAME("lr", I7),
+
+ REG_OFFSET_END,
+};
+
/*
* Called by kernel/ptrace.c when detaching..
*
@@ -1107,3 +1144,20 @@ asmlinkage void syscall_trace_leave(struct pt_regs *regs)
if (test_thread_flag(TIF_NOHZ))
user_enter();
}
+
+/**
+ * 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;
+}