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authorCorey Minyard <cminyard@mvista.com>2017-08-10 13:27:39 -0500
committerRalf Baechle <ralf@linux-mips.org>2017-09-06 11:01:52 +0200
commit866b6a89c6d1876fce25c152ef9f887b41ffcf7f (patch)
treeee1d5a144e4ca31cfbc6d569bbce8cc493d53a2e /arch/mips/kernel
parent9fef68686317bc9f85fb4e84e225d26ea2cb1cac (diff)
downloadlinux-866b6a89c6d1876fce25c152ef9f887b41ffcf7f.tar.bz2
MIPS: Add DWARF unwinding to assembly
This will allow kdump dumps to work correclty with MIPS and future DWARF unwinding of the stack to give accurate tracebacks. Signed-off-by: Corey Minyard <cminyard@mvista.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16990/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel')
-rw-r--r--arch/mips/kernel/genex.S13
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/mips/kernel/genex.S b/arch/mips/kernel/genex.S
index ae810da4d499..37b9383eacd3 100644
--- a/arch/mips/kernel/genex.S
+++ b/arch/mips/kernel/genex.S
@@ -150,6 +150,7 @@ LEAF(__r4k_wait)
.align 5
BUILD_ROLLBACK_PROLOGUE handle_int
NESTED(handle_int, PT_SIZE, sp)
+ .cfi_signal_frame
#ifdef CONFIG_TRACE_IRQFLAGS
/*
* Check to see if the interrupted code has just disabled
@@ -181,7 +182,7 @@ NESTED(handle_int, PT_SIZE, sp)
1:
.set pop
#endif
- SAVE_ALL
+ SAVE_ALL docfi=1
CLI
TRACE_IRQS_OFF
@@ -269,8 +270,8 @@ NESTED(except_vec_ejtag_debug, 0, sp)
*/
BUILD_ROLLBACK_PROLOGUE except_vec_vi
NESTED(except_vec_vi, 0, sp)
- SAVE_SOME
- SAVE_AT
+ SAVE_SOME docfi=1
+ SAVE_AT docfi=1
.set push
.set noreorder
PTR_LA v1, except_vec_vi_handler
@@ -396,6 +397,7 @@ NESTED(except_vec_nmi, 0, sp)
__FINIT
NESTED(nmi_handler, PT_SIZE, sp)
+ .cfi_signal_frame
.set push
.set noat
/*
@@ -478,6 +480,7 @@ NESTED(nmi_handler, PT_SIZE, sp)
.macro __BUILD_HANDLER exception handler clear verbose ext
.align 5
NESTED(handle_\exception, PT_SIZE, sp)
+ .cfi_signal_frame
.set noat
SAVE_ALL
FEXPORT(handle_\exception\ext)
@@ -485,8 +488,8 @@ NESTED(nmi_handler, PT_SIZE, sp)
.set at
__BUILD_\verbose \exception
move a0, sp
- PTR_LA ra, ret_from_exception
- j do_\handler
+ jal do_\handler
+ j ret_from_exception
END(handle_\exception)
.endm