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>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/sh/kernel/dwarf.c b/arch/sh/kernel/dwarf.c
index db021361b16..c6c5764a8ab 100644
--- 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: