Commit e0bbb538 authored May 24, 2020 by Guo Ren

csky: Fixup abiv2 syscall_trace break a4 & a5



Current implementation could destory a4 & a5 when strace, so we need to get them
from pt_regs by SAVE_ALL.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>

parent 90089759

arch/csky/abiv2/inc/abi/entry.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -13,6 +13,8 @@
		#define LSAVE_A1 28
		#define LSAVE_A2 32
		#define LSAVE_A3 36
		#define LSAVE_A4 40
		#define LSAVE_A5 44

		#define KSPTOUSP
		#define USPTOKSP

arch/csky/kernel/entry.S

+4 −2

Original line number	Diff line number	Diff line
		@@ -173,8 +173,10 @@ csky_syscall_trace:
		ldw a3, (sp, LSAVE_A3)
		#if defined(__CSKYABIV2__)
		subi sp, 8
		stw r5, (sp, 0x4)
		stw r4, (sp, 0x0)
		ldw r9, (sp, LSAVE_A4)
		stw r9, (sp, 0x0)
		ldw r9, (sp, LSAVE_A5)
		stw r9, (sp, 0x4)
		#else
		ldw r6, (sp, LSAVE_A4)
		ldw r7, (sp, LSAVE_A5)