blob: 3b4b4c708e8276dff705e9f1921a801a477c6638 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
From 53ab5a3fec283aeb9d2efeb632d423b774192e65 Mon Sep 17 00:00:00 2001
From: Mahesh Bodapati <mbodapat@xilinx.com>
Date: Thu, 12 Jan 2017 17:50:03 +0530
Subject: [PATCH 13/63] [Patch, microblaze]: Fixed missing save of r18 in
fast_interrupt. Register 18 is used as a clobber register, and must be stored
when entering a fast_interrupt. Before this fix, register 18 was only saved
if it was used directly in the interrupt function.
However, if the fast_interrupt function called a function that used
r18, the register would not be saved, and thus be mangled
upon returning from the interrupt.
Changelog
2014-02-27 Klaus Petersen <klauspetersen@gmail.com>
* gcc/config/microblaze/microblaze.c: Check for fast_interrupt in
microblaze_must_save_register.
Signed-off-by: Klaus Petersen <klauspetersen@gmail.com>
Signed-off-by: David Holsgrove <david.holsgrove@xilinx.com>
---
gcc/config/microblaze/microblaze.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gcc/config/microblaze/microblaze.c b/gcc/config/microblaze/microblaze.c
index ae45038..c834b49 100644
--- a/gcc/config/microblaze/microblaze.c
+++ b/gcc/config/microblaze/microblaze.c
@@ -2043,7 +2043,7 @@ microblaze_must_save_register (int regno)
{
if (df_regs_ever_live_p (regno)
|| regno == MB_ABI_MSR_SAVE_REG
- || (interrupt_handler
+ || ((interrupt_handler || fast_interrupt)
&& (regno == MB_ABI_ASM_TEMP_REGNUM
|| regno == MB_ABI_EXCEPTION_RETURN_ADDR_REGNUM)))
return 1;
--
2.7.4
|
