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📁 ..	-	2024-02-02 18:09
📄 asm.go // Copyright 2022 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. //go:build ppc64 \|\| ppc64le package main func syncIcache(p uintptr)	230 B	2024-02-02 18:09
📄 asm_generic.go // Copyright 2022 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. //go:build !ppc64 && !ppc64le package main func syncIcache(p uintptr) { }	236 B	2024-02-02 18:09
📄 asm_ppc64.s // Copyright 2022 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. #include "textflag.h" // func syncIcache(p uintptr) TEXT main·syncIcache(SB), NOSPLIT\|NOFRAME, $0-0 SYNC MOVD (R3), R3 ICBI (R3) ISYNC RET	306 B	2024-02-02 18:09
📄 asm_ppc64le.s // Copyright 2022 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. #include "textflag.h" // func syncIcache(p uintptr) TEXT main·syncIcache(SB), NOSPLIT\|NOFRAME, $0-0 SYNC MOVD (R3), R3 ICBI (R3) ISYNC RET	306 B	2024-02-02 18:09
📄 issue11656.go // Copyright 2015 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package main import ( "encoding/binary" "runtime" "runtime/debug" "unsafe" ) func main() { debug.SetPanicOnFault(true) defer func() { if err := recover(); err == nil { panic("not panicking") } pc, _, _, _ := runtime.Caller(10) f := runtime.FuncForPC(pc) if f == nil \|\| f.Name() != "main.f" { if f == nil { println("no func for ", unsafe.Pointer(pc)) } else { println("found func:", f.Name()) } panic("cannot find main.f on stack") } }() f(20) } func f(n int) { if n > 0 { f(n - 1) } var f struct { x uintptr } // We want to force a seg fault, to get a crash at a PC value != 0. // Not all systems make the data section non-executable. ill := make([]byte, 64) switch runtime.GOARCH { case "386", "amd64": ill = append(ill[:0], 0x89, 0x04, 0x25, 0x00, 0x00, 0x00, 0x00) // MOVL AX, 0 case "arm": binary.LittleEndian.PutUint32(ill[0:4], 0xe3a00000) // MOVW $0, R0 binary.LittleEndian.PutUint32(ill[4:8], 0xe5800000) // MOVW R0, (R0) case "arm64": binary.LittleEndian.PutUint32(ill, 0xf90003ff) // MOVD ZR, (ZR) case "ppc64": binary.BigEndian.PutUint32(ill, 0xf8000000) // MOVD R0, (R0) case "ppc64le": binary.LittleEndian.PutUint32(ill, 0xf8000000) // MOVD R0, (R0) case "mips", "mips64": binary.BigEndian.PutUint32(ill, 0xfc000000) // MOVV R0, (R0) case "mipsle", "mips64le": binary.LittleEndian.PutUint32(ill, 0xfc000000) // MOVV R0, (R0) case "s390x": ill = append(ill[:0], 0xa7, 0x09, 0x00, 0x00) // MOVD $0, R0 ill = append(ill, 0xe3, 0x00, 0x00, 0x00, 0x00, 0x24) // MOVD R0, (R0) case "riscv64": binary.LittleEndian.PutUint32(ill, 0x00003023) // MOV X0, (X0) default: // Just leave it as 0 and hope for the best. } f.x = uintptr(unsafe.Pointer(&ill[0])) p := &f fn := (func())(unsafe.Pointer(&p)) syncIcache(f.x) fn() }	1.95 KB	2024-02-02 18:09

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