Update all debug directives.
The libcorkscrew stack unwinder does not understand cfi directives,
so add .save directives so that it can function properly.
Also add the directives in to strcmp.S and fix a missing set of
directives in cortex-a9/memcpy_base.S.
Bug: 10345269
Merge from internal master.
(cherry-picked from 5f7ccea3ffab05aeceecb85c821003cf580630d3)
Change-Id: If48a216203216a643807f5d61906015984987189
diff --git a/libc/arch-arm/krait/bionic/memcpy.S b/libc/arch-arm/krait/bionic/memcpy.S
index 75b2395..3b4fca4 100644
--- a/libc/arch-arm/krait/bionic/memcpy.S
+++ b/libc/arch-arm/krait/bionic/memcpy.S
@@ -55,6 +55,7 @@
ENTRY(memcpy)
.cfi_startproc
pld [r1, #64]
+ .save {r0, lr}
stmfd sp!, {r0, lr}
.cfi_def_cfa_offset 8
.cfi_rel_offset r0, 0
@@ -64,9 +65,11 @@
.cfi_endproc
END(memcpy)
+ .fnstart
.cfi_startproc
__memcpy_chk_fail:
// Preserve lr for backtrace.
+ .save {lr}
push {lr}
.cfi_def_cfa_offset 4
.cfi_rel_offset lr, 0
@@ -81,6 +84,7 @@
error_message:
.word error_string-(1b+4)
.cfi_endproc
+ .fnend
.data
error_string: