From ed23e22fb25a2d3dc357c0743f51b2735fc46a6a Mon Sep 17 00:00:00 2001 From: Mahesh Bodapati Date: Thu, 12 Jan 2017 17:50:03 +0530 Subject: [PATCH 13/54] [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 * gcc/config/microblaze/microblaze.c: Check for fast_interrupt in microblaze_must_save_register. Signed-off-by: Klaus Petersen Signed-off-by: David Holsgrove --- 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 cbe8cb7..6f0b4f4 100644 --- a/gcc/config/microblaze/microblaze.c +++ b/gcc/config/microblaze/microblaze.c @@ -1967,7 +1967,7 @@ 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