sh: Set the cfa_offset to 0 if we see a DW_CFA_def_cfa_register op

The way that the CFA is calculated can change as we progress through a
function. If we see a DW_CFA_def_cfa_register op we need to reset the
frame's cfa_offset value which may have been previously setup.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --git a/arch/sh/kernel/dwarf.c b/arch/sh/kernel/dwarf.c
index db02136..c6c5764 100644 (file)
--- a/arch/sh/kernel/dwarf.c
+++ b/arch/sh/kernel/dwarf.c
@@ -449,6 +449,7 @@ static int dwarf_cfa_execute_insns(unsigned char *insn_start,
                        count = dwarf_read_uleb128(current_insn,
                                                   &frame->cfa_register);
                        current_insn += count;
+                       frame->cfa_offset = 0;
                        frame->flags |= DWARF_FRAME_CFA_REG_OFFSET;
                        break;
                case DW_CFA_def_cfa_offset: