| From 79ea36649467aea6045a49c7d016f8f9245efb8c Mon Sep 17 00:00:00 2001 |
| From: Mahesh Bodapati <mbodapat@xilinx.com> |
| Date: Sat, 26 Aug 2017 19:21:29 -0700 |
| Subject: [PATCH] MicroBlaze fixed missing save of r18 in fast_interrupt |
| |
| 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> |
| Signed-off-by: Mahesh Bodapati <mbodapat@xilinx.com> |
| Signed-off-by: Manjukumar Matha <manjukumar.harthikote-matha@xilinx.com> |
| Upstream-Status: Pending |
| --- |
| 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 15080db539..558796cad9 100644 |
| --- a/gcc/config/microblaze/microblaze.c |
| +++ b/gcc/config/microblaze/microblaze.c |
| @@ -1943,7 +1943,7 @@ 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; |
| -- |
| 2.14.2 |
| |