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runtime: remove the fake mstart caller in systemstack on linux/loong64 

The backtrace knows to stop in the system stack due to writing to the SP,
so here the fake mstart caller in the system stack is no longer needed and
can be removed

ref. CL 288799

Change-Id: I0841e75fd515cf6a0d98abe4cffc3f63fc275e0e
Reviewed-on: https://go-review.googlesource.com/c/go/+/416035
Auto-Submit: Wayne Zuo <wdvxdr@golangcn.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: WANG Xuerui <git@xen0n.name>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Wayne Zuo <wdvxdr@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
This commit is contained in:
Guoqi Chen 2022-07-04 14:29:52 +08:00 committed by Gopher Robot
parent 3360be4a11
commit c8402cd330
1 changed files with 0 additions and 4 deletions
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4
src/runtime/asm_loong64.s
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@ -186,10 +186,6 @@ switch:
MOVV R5, g
JAL runtime·save_g(SB)
MOVV (g_sched+gobuf_sp)(g), R19
// make it look like mstart called systemstack on g0, to stop traceback
ADDV $-8, R19
MOVV $runtime·mstart(SB), R6
MOVV R6, 0(R19)
MOVV R19, R3
// call target function