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Revert "reflect, runtime: add reflect support for regabi on riscv64"

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This reverts commit 56400fc706.

Reason for revert: this CL requires CL360296 be merged

Change-Id: I4c48c4d23b73b6e892cf86cbbc864698ebc5c992
Reviewed-on: https://go-review.googlesource.com/c/go/+/396076
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: mzh <mzh@golangcn.org>
Run-TryBot: mzh <mzh@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
This commit is contained in:
mzh 2022-03-27 23:08:32 +00:00
parent 0eea25159f
commit ad646b33c9
2 changed files with 9 additions and 48 deletions
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54
src/reflect/asm_riscv64.s
View file

@ -5,72 +5,34 @@
#include "textflag.h" #include "textflag.h"
#include "funcdata.h" #include "funcdata.h"
// 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/callMethod) + (8 bool with padding) + 392 (abi.RegArgs) = 432.
// makeFuncStub is the code half of the function returned by MakeFunc. // makeFuncStub is the code half of the function returned by MakeFunc.
// See the comment on the declaration of makeFuncStub in makefunc.go // See the comment on the declaration of makeFuncStub in makefunc.go
// for more details. // for more details.
// No arg size here, runtime pulls arg map out of the func value. // No arg size here, runtime pulls arg map out of the func value.
TEXT ·makeFuncStub(SB),(NOSPLIT|WRAPPER),$432 TEXT ·makeFuncStub(SB),(NOSPLIT|WRAPPER),$40
NO_LOCAL_POINTERS NO_LOCAL_POINTERS
ADD $LOCAL_REGARGS, SP, X25 // spillArgs using X25
CALL runtime·spillArgs(SB)
MOV CTXT, 32(SP) // save CTXT > args of moveMakeFuncArgPtrs < LOCAL_REGARGS
MOV CTXT, 8(SP)
MOV X25, 16(SP)
CALL ·moveMakeFuncArgPtrs(SB)
MOV 32(SP), CTXT // restore CTXT
MOV CTXT, 8(SP) MOV CTXT, 8(SP)
MOV $argframe+0(FP), T0 MOV $argframe+0(FP), T0
MOV T0, 16(SP) MOV T0, 16(SP)
MOV ZERO, LOCAL_RETVALID(SP) ADD $40, SP, T1
ADD $LOCAL_RETVALID, SP, T1
MOV T1, 24(SP) MOV T1, 24(SP)
MOV $LOCAL_REGARGS, SP, T1 MOV ZERO, 32(SP)
MOV T1, 32(SP) MOVB ZERO, 40(SP)
CALL ·callReflect(SB) CALL ·callReflect(SB)
ADD $LOCAL_REGARGS, SP, X25 // unspillArgs using X25
CALL runtime·unspillArgs(SB)
RET RET
// methodValueCall is the code half of the function returned by makeMethodValue. // methodValueCall is the code half of the function returned by makeMethodValue.
// See the comment on the declaration of methodValueCall in makefunc.go // See the comment on the declaration of methodValueCall in makefunc.go
// for more details. // for more details.
// No arg size here; runtime pulls arg map out of the func value. // No arg size here; runtime pulls arg map out of the func value.
TEXT ·methodValueCall(SB),(NOSPLIT|WRAPPER),$432 TEXT ·methodValueCall(SB),(NOSPLIT|WRAPPER),$40
NO_LOCAL_POINTERS NO_LOCAL_POINTERS
ADD $LOCAL_REGARGS, SP, X25 // spillArgs using X25
CALL runtime·spillArgs(SB)
MOV CTXT, 32(SP) // save CTXT
MOV CTXT, 8(SP)
MOV X25, 16(SP)
CALL ·moveMakeFuncArgPtrs(SB)
MOV 32(SP), CTXT // restore CTXT
MOV CTXT, 8(SP) MOV CTXT, 8(SP)
MOV $argframe+0(FP), T0 MOV $argframe+0(FP), T0
MOV T0, 16(SP) MOV T0, 16(SP)
MOV ZERO, LOCAL_RETVALID(SP) ADD $40, SP, T1
ADD $LOCAL_RETVALID, SP, T1
MOV T1, 24(SP) MOV T1, 24(SP)
MOV $LOCAL_REGARGS, SP, T1 MOV ZERO, 32(SP)
MOV T1, 32(SP) // frame size to 32+SP as callreflect args MOVB ZERO, 40(SP)
CALL ·callMethod(SB) CALL ·callMethod(SB)
ADD $LOCAL_REGARGS, SP, X25 // unspillArgs using X25
CALL runtime·unspillArgs(SB)
RET RET

3
src/runtime/stack.go
View file

@ -1332,8 +1332,7 @@ func getStackMap(frame *stkframe, cache *pcvalueCache, debug bool) (locals, args
} }
// stack objects. // stack objects.
if (GOARCH == "amd64" || GOARCH == "arm64" || GOARCH == "ppc64" || GOARCH == "ppc64le" || GOARCH == "riscv64") && if (GOARCH == "amd64" || GOARCH == "arm64" || GOARCH == "ppc64" || GOARCH == "ppc64le") && unsafe.Sizeof(abi.RegArgs{}) > 0 && frame.argmap != nil {
unsafe.Sizeof(abi.RegArgs{}) > 0 && frame.argmap != nil {
// argmap is set when the function is reflect.makeFuncStub or reflect.methodValueCall. // argmap is set when the function is reflect.makeFuncStub or reflect.methodValueCall.
// We don't actually use argmap in this case, but we need to fake the stack object // We don't actually use argmap in this case, but we need to fake the stack object
// record for these frames which contain an internal/abi.RegArgs at a hard-coded offset. // record for these frames which contain an internal/abi.RegArgs at a hard-coded offset.