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internal/runtime/syscall: Syscall changes for s390x regabi

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Updates #40724

Change-Id: I07a01ac1bda71214f01f4a72e15ab469ef275725
Reviewed-on: https://go-review.googlesource.com/c/go/+/719423
Reviewed-by: Vishwanatha HD <vishwanatha.hd@ibm.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This commit is contained in:
Srinivas Pokala 2025-11-11 05:19:47 +01:00 • committed by Keith Randall
parent 2a185fae7e
commit 58a48a3e3b
1 changed files with 21 additions and 1 deletions
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22
src/internal/runtime/syscall/linux/asm_linux_s390x.s
View file

@ -5,7 +5,16 @@
#include "textflag.h"
// func Syscall6(num, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr)
TEXT ·Syscall6(SB),NOSPLIT,$0-80
TEXT ·Syscall6<ABIInternal>(SB),NOSPLIT,$0-80
#ifdef GOEXPERIMENT_regabiargs
MOVD R2, R1
MOVD R3, R2
MOVD R4, R3
MOVD R5, R4
MOVD R6, R5
MOVD R7, R6
MOVD R8, R7
#else
MOVD num+0(FP), R1 // syscall entry
MOVD a1+8(FP), R2
MOVD a2+16(FP), R3
@ -13,16 +22,27 @@ TEXT ·Syscall6(SB),NOSPLIT,$0-80
MOVD a4+32(FP), R5
MOVD a5+40(FP), R6
MOVD a6+48(FP), R7
#endif
SYSCALL
MOVD $0xfffffffffffff001, R8
CMPUBLT R2, R8, ok
#ifdef GOEXPERIMENT_regabiargs
MOVD $0, R3
NEG R2, R4
MOVD $-1, R2
#else
MOVD $-1, r1+56(FP)
MOVD $0, r2+64(FP)
NEG R2, R2
MOVD R2, errno+72(FP)
#endif
RET
ok:
#ifdef GOEXPERIMENT_regabiargs
MOVD $0, R4
#else
MOVD R2, r1+56(FP)
MOVD R3, r2+64(FP)
MOVD $0, errno+72(FP)
#endif
RET