mirror
/
go
mirror of https://github.com/golang/go.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

reflect, runtime: add reflect support for regabi on riscv64 

This CL adds regabi support needed for reflect.

Change-Id: Ib78f8c7765f03e3a7b46e8b115bf8870b8076e6a
Reviewed-on: https://go-review.googlesource.com/c/go/+/360994
Trust: mzh <mzh@golangcn.org>
Run-TryBot: mzh <mzh@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This commit is contained in:
Meng Zhuo 2021-11-03 18:01:09 +08:00 committed by mzh
parent 79e051ad33
commit 56400fc706
2 changed files with 48 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
src/reflect/asm_riscv64.s
View File

@ -5,34 +5,72 @@
#include "textflag.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.
// 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
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 $argframe+0(FP), T0
MOV T0, 16(SP)
ADD $40, SP, T1
MOV ZERO, LOCAL_RETVALID(SP)
ADD $LOCAL_RETVALID, SP, T1
MOV T1, 24(SP)
MOV ZERO, 32(SP)
MOVB ZERO, 40(SP)
MOV $LOCAL_REGARGS, SP, T1
MOV T1, 32(SP)
CALL ·callReflect(SB)
ADD $LOCAL_REGARGS, SP, X25 // unspillArgs using X25
CALL 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
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 $argframe+0(FP), T0
MOV T0, 16(SP)
ADD $40, SP, T1
MOV ZERO, LOCAL_RETVALID(SP)
ADD $LOCAL_RETVALID, SP, T1
MOV T1, 24(SP)
MOV ZERO, 32(SP)
MOVB ZERO, 40(SP)
MOV $LOCAL_REGARGS, SP, T1
MOV T1, 32(SP) // frame size to 32+SP as callreflect args
CALL ·callMethod(SB)
ADD $LOCAL_REGARGS, SP, X25 // unspillArgs using X25
CALL runtime·unspillArgs(SB)
RET

3
src/runtime/stack.go
View File

@ -1332,7 +1332,8 @@ func getStackMap(frame *stkframe, cache *pcvalueCache, debug bool) (locals, args
}
// stack objects.
if (GOARCH == "amd64" || GOARCH == "arm64" || GOARCH == "ppc64" || GOARCH == "ppc64le") && unsafe.Sizeof(abi.RegArgs{}) > 0 && frame.argmap != nil {
if (GOARCH == "amd64" || GOARCH == "arm64" || GOARCH == "ppc64" || GOARCH == "ppc64le" || GOARCH == "riscv64") &&
unsafe.Sizeof(abi.RegArgs{}) > 0 && frame.argmap != nil {
// 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
// record for these frames which contain an internal/abi.RegArgs at a hard-coded offset.