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authorWilco Dijkstra <wdijkstr@arm.com>2017-09-14 12:47:35 +0100
committerWilco Dijkstra <wdijkstr@arm.com>2017-09-19 15:07:58 +0100
commitca3a382ea3aa9c9ccb57060afae47c7f702727ac (patch)
tree53dbe1397c04c1ee52a024bd4193e1119b625df7 /csu
parenteb375def3ddd2a1738ed6bc5ace98753f0f7e5e6 (diff)
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Enable unwind info in libc-start.c and backtrace.c
Add unwind info to __libc_start_main so that unwinding continues one
extra level to _start.  Similarly add unwind info to backtrace.
Given many targets require this, do this in a general way.

	* csu/Makefile: Add -funwind-tables to libc-start.c.
	* debug/Makefile: Add -funwind-tables to backtrace.c.
	* sysdeps/aarch64/Makefile: Remove CFLAGS-backtrace.c.
	* sysdeps/arm/Makefile: Likewise.
	* sysdeps/i386/Makefile: Likewise.
	* sysdeps/m68k/Makefile: Likewise.
	* sysdeps/mips/Makefile: Likewise.
	* sysdeps/nios2/Makefile: Likewise.
	* sysdeps/sh/Makefile: Likewise.
	* sysdeps/sparc/Makefile: Likewise.
Diffstat (limited to 'csu')
-rw-r--r--csu/Makefile3
1 files changed, 3 insertions, 0 deletions
diff --git a/csu/Makefile b/csu/Makefile
index 88646b6e8f..490d0b0f3b 100644
--- a/csu/Makefile
+++ b/csu/Makefile
@@ -82,6 +82,9 @@ extra-objs += $(crtstuff:=.o)
 extra-objs += abi-note.o init.o
 asm-CPPFLAGS += -I$(objpfx).
 
+# Enable unwinding so backtrace unwinds to __libc_start_main
+CFLAGS-libc-start.c += -funwind-tables
+
 include ../Rules
 
 # Make these in the lib pass so they're available in time to link things with.