From: Vineet Gupta <vgupta@synopsys.com>
Date: Fri, 8 Dec 2017 16:45:57 +0000 (-0800)
Subject: ARC: handle gcc generated __builtin_trap for older compiler
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3b851f87ba20ee8825af227f846feee85856a1ec;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

ARC: handle gcc generated __builtin_trap for older compiler

commit af1be2e21203867cb958aaceed5366e2e24b88e8 upstream.

ARC gcc prior to GNU 2018.03 release didn't have a target specific
__builtin_trap() implementation, generating default abort() call.

Implement the abort() call - emulating what newer gcc does for the same,
as suggested by Arnd.

Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/arch/arc/kernel/traps.c b/arch/arc/kernel/traps.c
index bcd7c9fc5d0f..869ac2d421c8 100644
--- a/arch/arc/kernel/traps.c
+++ b/arch/arc/kernel/traps.c
@@ -155,3 +155,11 @@ void do_insterror_or_kprobe(unsigned long address, struct pt_regs *regs)
 
 	insterror_is_error(address, regs);
 }
+
+/*
+ * abort() call generated by older gcc for __builtin_trap()
+ */
+void abort(void)
+{
+	__asm__ __volatile__("trap_s  5\n");
+}