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reflect, runtime: add reflect support for regABI on loong64

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Update #40724

Co-authored-by: Xiaolin Zhao <zhaoxiaolin@loongson.cn>
Change-Id: I0549fd1a2192ffb041034ff41bf0cc4be0b1662c
Reviewed-on: https://go-review.googlesource.com/c/go/+/521784
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Meidan Li <limeidan@loongson.cn>
Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
This commit is contained in:
Guoqi Chen 2023-08-16 08:28:28 +08:00 committed by Gopher Robot
parent f6f141ab80
commit 4e6bbbe61f
2 changed files with 64 additions and 15 deletions
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77
src/reflect/asm_loong64.s
View File

@ -7,34 +7,83 @@
#define REGCTXT R29
// The frames of each of the two functions below contain two locals, at offsets
// that are known to the runtime.
//
// The first local is a bool called retValid with a whole pointer-word reserved
// for it on the stack. The purpose of this word is so that the runtime knows
// whether the stack-allocated return space contains valid values for stack
// scanning.
//
// The second local is an abi.RegArgs value whose offset is also known to the
// runtime, so that a stack map for it can be constructed, since it contains
// pointers visible to the GC.
#define LOCAL_RETVALID 40
#define LOCAL_REGARGS 48
// The frame size of the functions below is
// 32 (args of callReflect) + 8 (bool + padding) + 392 (abi.RegArgs) = 432.
// makeFuncStub is the code half of the function returned by MakeFunc.
// See the comment on the declaration of makeFuncStub in makefunc.go
// for more details.
// No arg size here, runtime pulls arg map out of the func value.
TEXT ·makeFuncStub(SB),(NOSPLIT|WRAPPER),$40
TEXT ·makeFuncStub(SB),(NOSPLIT|WRAPPER),$432
NO_LOCAL_POINTERS
ADDV $LOCAL_REGARGS, R3, R25 // spillArgs using R25
JAL runtime·spillArgs(SB)
MOVV REGCTXT, 32(R3) // save REGCTXT > args of moveMakeFuncArgPtrs < LOCAL_REGARGS
#ifdef GOEXPERIMENT_regabiargs
MOVV REGCTXT, R4
MOVV R25, R5
#else
MOVV REGCTXT, 8(R3)
MOVV $argframe+0(FP), R19
MOVV R19, 16(R3)
MOVB R0, 40(R3)
ADDV $40, R3, R19
MOVV R19, 24(R3)
MOVV R0, 32(R3)
MOVV R25, 16(R3)
#endif
JAL ·moveMakeFuncArgPtrs<ABIInternal>(SB)
MOVV 32(R3), REGCTXT // restore REGCTXT
MOVV REGCTXT, 8(R3)
MOVV $argframe+0(FP), R20
MOVV R20, 16(R3)
MOVV R0, LOCAL_RETVALID(R3)
ADDV $LOCAL_RETVALID, R3, R20
MOVV R20, 24(R3)
ADDV $LOCAL_REGARGS, R3, R20
MOVV R20, 32(R3)
JAL ·callReflect(SB)
ADDV $LOCAL_REGARGS, R3, R25 //unspillArgs using R25
JAL runtime·unspillArgs(SB)
RET
// methodValueCall is the code half of the function returned by makeMethodValue.
// See the comment on the declaration of methodValueCall in makefunc.go
// for more details.
// No arg size here; runtime pulls arg map out of the func value.
TEXT ·methodValueCall(SB),(NOSPLIT|WRAPPER),$40
TEXT ·methodValueCall(SB),(NOSPLIT|WRAPPER),$432
NO_LOCAL_POINTERS
ADDV $LOCAL_REGARGS, R3, R25 // spillArgs using R25
JAL runtime·spillArgs(SB)
MOVV REGCTXT, 32(R3) // save REGCTXT > args of moveMakeFuncArgPtrs < LOCAL_REGARGS
#ifdef GOEXPERIMENT_regabiargs
MOVV REGCTXT, R4
MOVV R25, R5
#else
MOVV REGCTXT, 8(R3)
MOVV $argframe+0(FP), R19
MOVV R19, 16(R3)
MOVB R0, 40(R3)
ADDV $40, R3, R19
MOVV R19, 24(R3)
MOVV R0, 32(R3)
MOVV R25, 16(R3)
#endif
JAL ·moveMakeFuncArgPtrs<ABIInternal>(SB)
MOVV 32(R3), REGCTXT // restore REGCTXT
MOVV REGCTXT, 8(R3)
MOVV $argframe+0(FP), R20
MOVV R20, 16(R3)
MOVB R0, LOCAL_RETVALID(R3)
ADDV $LOCAL_RETVALID, R3, R20
MOVV R20, 24(R3)
ADDV $LOCAL_REGARGS, R3, R20
MOVV R20, 32(R3) // frame size to 32+SP as callreflect args)
JAL ·callMethod(SB)
ADDV $LOCAL_REGARGS, R3, R25 // unspillArgs using R25
JAL runtime·unspillArgs(SB)
RET

2
src/runtime/stkframe.go
View File

@ -234,7 +234,7 @@ func (frame *stkframe) getStackMap(debug bool) (locals, args bitvector, objs []s
}
// stack objects.
if (GOARCH == "amd64" || GOARCH == "arm64" || GOARCH == "ppc64" || GOARCH == "ppc64le" || GOARCH == "riscv64") &&
if (GOARCH == "amd64" || GOARCH == "arm64" || GOARCH == "loong64" || GOARCH == "ppc64" || GOARCH == "ppc64le" || GOARCH == "riscv64") &&
unsafe.Sizeof(abi.RegArgs{}) > 0 && isReflect {
// For reflect.makeFuncStub and reflect.methodValueCall,
// we need to fake the stack object record.