[dev.regabi] runtime: delete gosave function

The runtime.gosave function is not used anywhere. Delete.

Note: there is also a gosave<> function, which is actually used
and not deleted.

Change-Id: I64149a7afdd217de26d1e6396233f2becfad7153
Reviewed-on: https://go-review.googlesource.com/c/go/+/289719
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>

10 files changed, 0 insertions, 151 deletions

diff --git a/src/runtime/asm_386.s b/src/runtime/asm_386.s
index fa3b1be339..429f3fef82 100644
--- a/src/runtime/asm_386.s
+++ b/src/runtime/asm_386.s
@@ -273,25 +273,6 @@ TEXT runtime·asminit(SB),NOSPLIT,$0-0
  *  go-routine
  */
 
-// void gosave(Gobuf*)
-// save state in Gobuf; setjmp
-TEXT runtime·gosave(SB), NOSPLIT, $0-4
-	MOVL	buf+0(FP), AX		// gobuf
-	LEAL	buf+0(FP), BX		// caller's SP
-	MOVL	BX, gobuf_sp(AX)
-	MOVL	0(SP), BX		// caller's PC
-	MOVL	BX, gobuf_pc(AX)
-	MOVL	$0, gobuf_ret(AX)
-	// Assert ctxt is zero. See func save.
-	MOVL	gobuf_ctxt(AX), BX
-	TESTL	BX, BX
-	JZ	2(PC)
-	CALL	runtime·badctxt(SB)
-	get_tls(CX)
-	MOVL	g(CX), BX
-	MOVL	BX, gobuf_g(AX)
-	RET
-
 // void gogo(Gobuf*)
 // restore state from Gobuf; longjmp
 TEXT runtime·gogo(SB), NOSPLIT, $8-4
diff --git a/src/runtime/asm_amd64.s b/src/runtime/asm_amd64.s
index aece84bde8..a9456dc9ff 100644
--- a/src/runtime/asm_amd64.s
+++ b/src/runtime/asm_amd64.s
@@ -254,26 +254,6 @@ TEXT runtime·asminit(SB),NOSPLIT,$0-0
  *  go-routine
  */
 
-// func gosave(buf *gobuf)
-// save state in Gobuf; setjmp
-TEXT runtime·gosave(SB), NOSPLIT, $0-8
-	MOVQ	buf+0(FP), AX		// gobuf
-	LEAQ	buf+0(FP), BX		// caller's SP
-	MOVQ	BX, gobuf_sp(AX)
-	MOVQ	0(SP), BX		// caller's PC
-	MOVQ	BX, gobuf_pc(AX)
-	MOVQ	$0, gobuf_ret(AX)
-	MOVQ	BP, gobuf_bp(AX)
-	// Assert ctxt is zero. See func save.
-	MOVQ	gobuf_ctxt(AX), BX
-	TESTQ	BX, BX
-	JZ	2(PC)
-	CALL	runtime·badctxt(SB)
-	get_tls(CX)
-	MOVQ	g(CX), BX
-	MOVQ	BX, gobuf_g(AX)
-	RET
-
 // func gogo(buf *gobuf)
 // restore state from Gobuf; longjmp
 TEXT runtime·gogo(SB), NOSPLIT, $16-8
diff --git a/src/runtime/asm_arm.s b/src/runtime/asm_arm.s
index c54b4eb006..8eec84d3f2 100644
--- a/src/runtime/asm_arm.s
+++ b/src/runtime/asm_arm.s
@@ -206,23 +206,6 @@ TEXT runtime·asminit(SB),NOSPLIT,$0-0
  *  go-routine
  */
 
-// void gosave(Gobuf*)
-// save state in Gobuf; setjmp
-TEXT runtime·gosave(SB),NOSPLIT|NOFRAME,$0-4
-	MOVW	buf+0(FP), R0
-	MOVW	R13, gobuf_sp(R0)
-	MOVW	LR, gobuf_pc(R0)
-	MOVW	g, gobuf_g(R0)
-	MOVW	$0, R11
-	MOVW	R11, gobuf_lr(R0)
-	MOVW	R11, gobuf_ret(R0)
-	// Assert ctxt is zero. See func save.
-	MOVW	gobuf_ctxt(R0), R0
-	CMP	R0, R11
-	B.EQ	2(PC)
-	CALL	runtime·badctxt(SB)
-	RET
-
 // void gogo(Gobuf*)
 // restore state from Gobuf; longjmp
 TEXT runtime·gogo(SB),NOSPLIT,$8-4
diff --git a/src/runtime/asm_arm64.s b/src/runtime/asm_arm64.s
index a09172f0c9..8e4a1f74f9 100644
--- a/src/runtime/asm_arm64.s
+++ b/src/runtime/asm_arm64.s
@@ -113,23 +113,6 @@ TEXT runtime·asminit(SB),NOSPLIT|NOFRAME,$0-0
  *  go-routine
  */
 
-// void gosave(Gobuf*)
-// save state in Gobuf; setjmp
-TEXT runtime·gosave(SB), NOSPLIT|NOFRAME, $0-8
-	MOVD	buf+0(FP), R3
-	MOVD	RSP, R0
-	MOVD	R0, gobuf_sp(R3)
-	MOVD	R29, gobuf_bp(R3)
-	MOVD	LR, gobuf_pc(R3)
-	MOVD	g, gobuf_g(R3)
-	MOVD	ZR, gobuf_lr(R3)
-	MOVD	ZR, gobuf_ret(R3)
-	// Assert ctxt is zero. See func save.
-	MOVD	gobuf_ctxt(R3), R0
-	CBZ	R0, 2(PC)
-	CALL	runtime·badctxt(SB)
-	RET
-
 // void gogo(Gobuf*)
 // restore state from Gobuf; longjmp
 TEXT runtime·gogo(SB), NOSPLIT, $24-8
diff --git a/src/runtime/asm_mips64x.s b/src/runtime/asm_mips64x.s
index 19781f7885..054a89dc37 100644
--- a/src/runtime/asm_mips64x.s
+++ b/src/runtime/asm_mips64x.s
@@ -89,21 +89,6 @@ TEXT runtime·asminit(SB),NOSPLIT|NOFRAME,$0-0
  *  go-routine
  */
 
-// void gosave(Gobuf*)
-// save state in Gobuf; setjmp
-TEXT runtime·gosave(SB), NOSPLIT|NOFRAME, $0-8
-	MOVV	buf+0(FP), R1
-	MOVV	R29, gobuf_sp(R1)
-	MOVV	R31, gobuf_pc(R1)
-	MOVV	g, gobuf_g(R1)
-	MOVV	R0, gobuf_lr(R1)
-	MOVV	R0, gobuf_ret(R1)
-	// Assert ctxt is zero. See func save.
-	MOVV	gobuf_ctxt(R1), R1
-	BEQ	R1, 2(PC)
-	JAL	runtime·badctxt(SB)
-	RET
-
 // void gogo(Gobuf*)
 // restore state from Gobuf; longjmp
 TEXT runtime·gogo(SB), NOSPLIT, $16-8
diff --git a/src/runtime/asm_mipsx.s b/src/runtime/asm_mipsx.s
index ee87d81436..f57437d590 100644
--- a/src/runtime/asm_mipsx.s
+++ b/src/runtime/asm_mipsx.s
@@ -90,21 +90,6 @@ TEXT runtime·asminit(SB),NOSPLIT,$0-0
  *  go-routine
  */
 
-// void gosave(Gobuf*)
-// save state in Gobuf; setjmp
-TEXT runtime·gosave(SB),NOSPLIT|NOFRAME,$0-4
-	MOVW	buf+0(FP), R1
-	MOVW	R29, gobuf_sp(R1)
-	MOVW	R31, gobuf_pc(R1)
-	MOVW	g, gobuf_g(R1)
-	MOVW	R0, gobuf_lr(R1)
-	MOVW	R0, gobuf_ret(R1)
-	// Assert ctxt is zero. See func save.
-	MOVW	gobuf_ctxt(R1), R1
-	BEQ	R1, 2(PC)
-	JAL	runtime·badctxt(SB)
-	RET
-
 // void gogo(Gobuf*)
 // restore state from Gobuf; longjmp
 TEXT runtime·gogo(SB),NOSPLIT,$8-4
diff --git a/src/runtime/asm_ppc64x.s b/src/runtime/asm_ppc64x.s
index dc34c0e4c8..763a92adf1 100644
--- a/src/runtime/asm_ppc64x.s
+++ b/src/runtime/asm_ppc64x.s
@@ -128,23 +128,6 @@ TEXT runtime·reginit(SB),NOSPLIT|NOFRAME,$0-0
  *  go-routine
  */
 
-// void gosave(Gobuf*)
-// save state in Gobuf; setjmp
-TEXT runtime·gosave(SB), NOSPLIT|NOFRAME, $0-8
-	MOVD	buf+0(FP), R3
-	MOVD	R1, gobuf_sp(R3)
-	MOVD	LR, R31
-	MOVD	R31, gobuf_pc(R3)
-	MOVD	g, gobuf_g(R3)
-	MOVD	R0, gobuf_lr(R3)
-	MOVD	R0, gobuf_ret(R3)
-	// Assert ctxt is zero. See func save.
-	MOVD	gobuf_ctxt(R3), R3
-	CMP	R0, R3
-	BEQ	2(PC)
-	BL	runtime·badctxt(SB)
-	RET
-
 // void gogo(Gobuf*)
 // restore state from Gobuf; longjmp
 TEXT runtime·gogo(SB), NOSPLIT, $16-8
diff --git a/src/runtime/asm_riscv64.s b/src/runtime/asm_riscv64.s
index 01b42dc3de..cf460d1586 100644
--- a/src/runtime/asm_riscv64.s
+++ b/src/runtime/asm_riscv64.s
@@ -297,21 +297,6 @@ TEXT runtime·mcall(SB), NOSPLIT|NOFRAME, $0-8
 	JALR	RA, T1
 	JMP	runtime·badmcall2(SB)
 
-// func gosave(buf *gobuf)
-// save state in Gobuf; setjmp
-TEXT runtime·gosave(SB), NOSPLIT|NOFRAME, $0-8
-	MOV	buf+0(FP), T1
-	MOV	X2, gobuf_sp(T1)
-	MOV	RA, gobuf_pc(T1)
-	MOV	g, gobuf_g(T1)
-	MOV	ZERO, gobuf_lr(T1)
-	MOV	ZERO, gobuf_ret(T1)
-	// Assert ctxt is zero. See func save.
-	MOV	gobuf_ctxt(T1), T1
-	BEQ	T1, ZERO, 2(PC)
-	CALL	runtime·badctxt(SB)
-	RET
-
 // Save state of caller into g->sched. Smashes X31.
 TEXT gosave<>(SB),NOSPLIT|NOFRAME,$0
 	MOV	X1, (g_sched+gobuf_pc)(g)
diff --git a/src/runtime/asm_s390x.s b/src/runtime/asm_s390x.s
index 7baef37324..1cd5eca06f 100644
--- a/src/runtime/asm_s390x.s
+++ b/src/runtime/asm_s390x.s
@@ -174,21 +174,6 @@ TEXT runtime·asminit(SB),NOSPLIT|NOFRAME,$0-0
  *  go-routine
  */
 
-// void gosave(Gobuf*)
-// save state in Gobuf; setjmp
-TEXT runtime·gosave(SB), NOSPLIT, $-8-8
-	MOVD	buf+0(FP), R3
-	MOVD	R15, gobuf_sp(R3)
-	MOVD	LR, gobuf_pc(R3)
-	MOVD	g, gobuf_g(R3)
-	MOVD	$0, gobuf_lr(R3)
-	MOVD	$0, gobuf_ret(R3)
-	// Assert ctxt is zero. See func save.
-	MOVD	gobuf_ctxt(R3), R3
-	CMPBEQ	R3, $0, 2(PC)
-	BL	runtime·badctxt(SB)
-	RET
-
 // void gogo(Gobuf*)
 // restore state from Gobuf; longjmp
 TEXT runtime·gogo(SB), NOSPLIT, $16-8
diff --git a/src/runtime/stubs.go b/src/runtime/stubs.go
index 2ee2c74dfe..36bbc8991a 100644
--- a/src/runtime/stubs.go
+++ b/src/runtime/stubs.go
@@ -167,7 +167,6 @@ func noescape(p unsafe.Pointer) unsafe.Pointer {
 // pointer-declared arguments.
 func cgocallback(fn, frame, ctxt uintptr)
 func gogo(buf *gobuf)
-func gosave(buf *gobuf)
 
 //go:noescape
 func jmpdefer(fv *funcval, argp uintptr)