diff options
Diffstat (limited to 'pkg/sentry/platform/kvm/testutil')
| -rw-r--r-- | pkg/sentry/platform/kvm/testutil/BUILD | 17 | ||||
| -rw-r--r-- | pkg/sentry/platform/kvm/testutil/testutil.go | 90 | ||||
| -rw-r--r-- | pkg/sentry/platform/kvm/testutil/testutil_amd64.go | 142 | ||||
| -rw-r--r-- | pkg/sentry/platform/kvm/testutil/testutil_amd64.s | 135 | ||||
| -rw-r--r-- | pkg/sentry/platform/kvm/testutil/testutil_arm64.go | 70 | ||||
| -rw-r--r-- | pkg/sentry/platform/kvm/testutil/testutil_arm64.s | 169 |
6 files changed, 0 insertions, 623 deletions
diff --git a/pkg/sentry/platform/kvm/testutil/BUILD b/pkg/sentry/platform/kvm/testutil/BUILD deleted file mode 100644 index f7feb8683..000000000 --- a/pkg/sentry/platform/kvm/testutil/BUILD +++ /dev/null @@ -1,17 +0,0 @@ -load("//tools:defs.bzl", "go_library") - -package(licenses = ["notice"]) - -go_library( - name = "testutil", - testonly = 1, - srcs = [ - "testutil.go", - "testutil_amd64.go", - "testutil_amd64.s", - "testutil_arm64.go", - "testutil_arm64.s", - ], - visibility = ["//pkg/sentry/platform/kvm:__pkg__"], - deps = ["//pkg/sentry/arch"], -) diff --git a/pkg/sentry/platform/kvm/testutil/testutil.go b/pkg/sentry/platform/kvm/testutil/testutil.go deleted file mode 100644 index d8c273796..000000000 --- a/pkg/sentry/platform/kvm/testutil/testutil.go +++ /dev/null @@ -1,90 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// Package testutil provides common assembly stubs for testing. -package testutil - -import ( - "fmt" - "strings" -) - -// Getpid executes a trivial system call. -func Getpid() - -// AddrOfGetpid returns the address of Getpid. -// -// In Go 1.17+, Go references to assembly functions resolve to an ABIInternal -// wrapper function rather than the function itself. We must reference from -// assembly to get the ABI0 (i.e., primary) address. -func AddrOfGetpid() uintptr - -// AddrOfTouch returns the address of a function that touches the value in the -// first register. -func AddrOfTouch() uintptr -func touch() - -// AddrOfSyscallLoop returns the address of a function that executes a syscall -// and loops. -func AddrOfSyscallLoop() uintptr -func syscallLoop() - -// AddrOfSpinLoop returns the address of a function that spins on the CPU. -func AddrOfSpinLoop() uintptr -func spinLoop() - -// AddrOfHaltLoop returns the address of a function that immediately halts and -// loops. -func AddrOfHaltLoop() uintptr -func haltLoop() - -// AddrOfTwiddleRegsFault returns the address of a function that twiddles -// registers then faults. -func AddrOfTwiddleRegsFault() uintptr -func twiddleRegsFault() - -// AddrOfTwiddleRegsSyscall returns the address of a function that twiddles -// registers then executes a syscall. -func AddrOfTwiddleRegsSyscall() uintptr -func twiddleRegsSyscall() - -// FloatingPointWorks is a floating point test. -// -// It returns true or false. -func FloatingPointWorks() bool - -// RegisterMismatchError is used for checking registers. -type RegisterMismatchError []string - -// Error returns a human-readable error. -func (r RegisterMismatchError) Error() string { - return strings.Join([]string(r), ";") -} - -// addRegisterMisatch allows simple chaining of register mismatches. -func addRegisterMismatch(err error, reg string, got, expected interface{}) error { - errStr := fmt.Sprintf("%s got %08x, expected %08x", reg, got, expected) - switch r := err.(type) { - case nil: - // Return a new register mismatch. - return RegisterMismatchError{errStr} - case RegisterMismatchError: - // Append the error. - r = append(r, errStr) - return r - default: - // Leave as is. - return err - } -} diff --git a/pkg/sentry/platform/kvm/testutil/testutil_amd64.go b/pkg/sentry/platform/kvm/testutil/testutil_amd64.go deleted file mode 100644 index 98c52b2f5..000000000 --- a/pkg/sentry/platform/kvm/testutil/testutil_amd64.go +++ /dev/null @@ -1,142 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -//go:build amd64 -// +build amd64 - -package testutil - -import ( - "reflect" - - "gvisor.dev/gvisor/pkg/sentry/arch" -) - -// AddrOfTwiddleSegments return the address of a function that reads segments -// into known registers. -func AddrOfTwiddleSegments() uintptr -func twiddleSegments() - -// SetTestTarget sets the rip appropriately. -func SetTestTarget(regs *arch.Registers, fn uintptr) { - regs.Rip = uint64(fn) -} - -// SetTouchTarget sets rax appropriately. -func SetTouchTarget(regs *arch.Registers, target *uintptr) { - if target != nil { - regs.Rax = uint64(reflect.ValueOf(target).Pointer()) - } else { - regs.Rax = 0 - } -} - -// RewindSyscall rewinds a syscall RIP. -func RewindSyscall(regs *arch.Registers) { - regs.Rip -= 2 -} - -// SetTestRegs initializes registers to known values. -func SetTestRegs(regs *arch.Registers) { - regs.R15 = 0x15 - regs.R14 = 0x14 - regs.R13 = 0x13 - regs.R12 = 0x12 - regs.Rbp = 0xb9 - regs.Rbx = 0xb4 - regs.R11 = 0x11 - regs.R10 = 0x10 - regs.R9 = 0x09 - regs.R8 = 0x08 - regs.Rax = 0x44 - regs.Rcx = 0xc4 - regs.Rdx = 0xd4 - regs.Rsi = 0x51 - regs.Rdi = 0xd1 - regs.Rsp = 0x59 -} - -// CheckTestRegs checks that registers were twiddled per TwiddleRegs. -func CheckTestRegs(regs *arch.Registers, full bool) (err error) { - if need := ^uint64(0x15); regs.R15 != need { - err = addRegisterMismatch(err, "R15", regs.R15, need) - } - if need := ^uint64(0x14); regs.R14 != need { - err = addRegisterMismatch(err, "R14", regs.R14, need) - } - if need := ^uint64(0x13); regs.R13 != need { - err = addRegisterMismatch(err, "R13", regs.R13, need) - } - if need := ^uint64(0x12); regs.R12 != need { - err = addRegisterMismatch(err, "R12", regs.R12, need) - } - if need := ^uint64(0xb9); regs.Rbp != need { - err = addRegisterMismatch(err, "Rbp", regs.Rbp, need) - } - if need := ^uint64(0xb4); regs.Rbx != need { - err = addRegisterMismatch(err, "Rbx", regs.Rbx, need) - } - if need := ^uint64(0x10); regs.R10 != need { - err = addRegisterMismatch(err, "R10", regs.R10, need) - } - if need := ^uint64(0x09); regs.R9 != need { - err = addRegisterMismatch(err, "R9", regs.R9, need) - } - if need := ^uint64(0x08); regs.R8 != need { - err = addRegisterMismatch(err, "R8", regs.R8, need) - } - if need := ^uint64(0x44); regs.Rax != need { - err = addRegisterMismatch(err, "Rax", regs.Rax, need) - } - if need := ^uint64(0xd4); regs.Rdx != need { - err = addRegisterMismatch(err, "Rdx", regs.Rdx, need) - } - if need := ^uint64(0x51); regs.Rsi != need { - err = addRegisterMismatch(err, "Rsi", regs.Rsi, need) - } - if need := ^uint64(0xd1); regs.Rdi != need { - err = addRegisterMismatch(err, "Rdi", regs.Rdi, need) - } - if need := ^uint64(0x59); regs.Rsp != need { - err = addRegisterMismatch(err, "Rsp", regs.Rsp, need) - } - // Rcx & R11 are ignored if !full is set. - if need := ^uint64(0x11); full && regs.R11 != need { - err = addRegisterMismatch(err, "R11", regs.R11, need) - } - if need := ^uint64(0xc4); full && regs.Rcx != need { - err = addRegisterMismatch(err, "Rcx", regs.Rcx, need) - } - return -} - -var fsData uint64 = 0x55 -var gsData uint64 = 0x85 - -// SetTestSegments initializes segments to known values. -func SetTestSegments(regs *arch.Registers) { - regs.Fs_base = uint64(reflect.ValueOf(&fsData).Pointer()) - regs.Gs_base = uint64(reflect.ValueOf(&gsData).Pointer()) -} - -// CheckTestSegments checks that registers were twiddled per TwiddleSegments. -func CheckTestSegments(regs *arch.Registers) (err error) { - if regs.Rax != fsData { - err = addRegisterMismatch(err, "Rax", regs.Rax, fsData) - } - if regs.Rbx != gsData { - err = addRegisterMismatch(err, "Rbx", regs.Rcx, gsData) - } - return -} diff --git a/pkg/sentry/platform/kvm/testutil/testutil_amd64.s b/pkg/sentry/platform/kvm/testutil/testutil_amd64.s deleted file mode 100644 index 65e7c05ea..000000000 --- a/pkg/sentry/platform/kvm/testutil/testutil_amd64.s +++ /dev/null @@ -1,135 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// +build amd64 - -// test_util_amd64.s provides AMD64 test functions. - -#include "funcdata.h" -#include "textflag.h" - -TEXT ·Getpid(SB),NOSPLIT,$0 - NO_LOCAL_POINTERS - MOVQ $39, AX // getpid - SYSCALL - RET - -// func AddrOfGetpid() uintptr -TEXT ·AddrOfGetpid(SB), $0-8 - MOVQ $·Getpid(SB), AX - MOVQ AX, ret+0(FP) - RET - -TEXT ·touch(SB),NOSPLIT,$0 -start: - MOVQ 0(AX), BX // deref AX - MOVQ $39, AX // getpid - SYSCALL - JMP start - -// func AddrOfTouch() uintptr -TEXT ·AddrOfTouch(SB), $0-8 - MOVQ $·touch(SB), AX - MOVQ AX, ret+0(FP) - RET - -TEXT ·syscallLoop(SB),NOSPLIT,$0 -start: - SYSCALL - JMP start - -// func AddrOfSyscallLoop() uintptr -TEXT ·AddrOfSyscallLoop(SB), $0-8 - MOVQ $·syscallLoop(SB), AX - MOVQ AX, ret+0(FP) - RET - -TEXT ·spinLoop(SB),NOSPLIT,$0 -start: - JMP start - -// func AddrOfSpinLoop() uintptr -TEXT ·AddrOfSpinLoop(SB), $0-8 - MOVQ $·spinLoop(SB), AX - MOVQ AX, ret+0(FP) - RET - -TEXT ·FloatingPointWorks(SB),NOSPLIT,$0-8 - NO_LOCAL_POINTERS - MOVQ $1, AX - MOVQ AX, X0 - MOVQ $39, AX // getpid - SYSCALL - MOVQ X0, AX - CMPQ AX, $1 - SETEQ ret+0(FP) - RET - -#define TWIDDLE_REGS() \ - NOTQ R15; \ - NOTQ R14; \ - NOTQ R13; \ - NOTQ R12; \ - NOTQ BP; \ - NOTQ BX; \ - NOTQ R11; \ - NOTQ R10; \ - NOTQ R9; \ - NOTQ R8; \ - NOTQ AX; \ - NOTQ CX; \ - NOTQ DX; \ - NOTQ SI; \ - NOTQ DI; \ - NOTQ SP; - -TEXT ·twiddleRegsSyscall(SB),NOSPLIT,$0 - TWIDDLE_REGS() - SYSCALL - RET // never reached - -// func AddrOfTwiddleRegsSyscall() uintptr -TEXT ·AddrOfTwiddleRegsSyscall(SB), $0-8 - MOVQ $·twiddleRegsSyscall(SB), AX - MOVQ AX, ret+0(FP) - RET - -TEXT ·twiddleRegsFault(SB),NOSPLIT,$0 - TWIDDLE_REGS() - JMP AX // must fault - RET // never reached - -// func AddrOfTwiddleRegsFault() uintptr -TEXT ·AddrOfTwiddleRegsFault(SB), $0-8 - MOVQ $·twiddleRegsFault(SB), AX - MOVQ AX, ret+0(FP) - RET - -#define READ_FS() BYTE $0x64; BYTE $0x48; BYTE $0x8b; BYTE $0x00; -#define READ_GS() BYTE $0x65; BYTE $0x48; BYTE $0x8b; BYTE $0x00; - -TEXT ·twiddleSegments(SB),NOSPLIT,$0 - MOVQ $0x0, AX - READ_GS() - MOVQ AX, BX - MOVQ $0x0, AX - READ_FS() - SYSCALL - RET // never reached - -// func AddrOfTwiddleSegments() uintptr -TEXT ·AddrOfTwiddleSegments(SB), $0-8 - MOVQ $·twiddleSegments(SB), AX - MOVQ AX, ret+0(FP) - RET diff --git a/pkg/sentry/platform/kvm/testutil/testutil_arm64.go b/pkg/sentry/platform/kvm/testutil/testutil_arm64.go deleted file mode 100644 index 346a10043..000000000 --- a/pkg/sentry/platform/kvm/testutil/testutil_arm64.go +++ /dev/null @@ -1,70 +0,0 @@ -// Copyright 2019 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -//go:build arm64 -// +build arm64 - -package testutil - -import ( - "fmt" - "reflect" - - "gvisor.dev/gvisor/pkg/sentry/arch" -) - -// TLSWorks is a tls test. -// -// It returns true or false. -func TLSWorks() bool - -// SetTestTarget sets the rip appropriately. -func SetTestTarget(regs *arch.Registers, fn uintptr) { - regs.Pc = uint64(fn) -} - -// SetTouchTarget sets rax appropriately. -func SetTouchTarget(regs *arch.Registers, target *uintptr) { - if target != nil { - regs.Regs[8] = uint64(reflect.ValueOf(target).Pointer()) - } else { - regs.Regs[8] = 0 - } -} - -// RewindSyscall rewinds a syscall RIP. -func RewindSyscall(regs *arch.Registers) { - regs.Pc -= 4 -} - -// SetTestRegs initializes registers to known values. -func SetTestRegs(regs *arch.Registers) { - for i := 0; i <= 30; i++ { - regs.Regs[i] = uint64(i) + 1 - } -} - -// CheckTestRegs checks that registers were twiddled per TwiddleRegs. -func CheckTestRegs(regs *arch.Registers, full bool) (err error) { - for i := 0; i <= 30; i++ { - if need := ^uint64(i + 1); regs.Regs[i] != need { - err = addRegisterMismatch(err, fmt.Sprintf("R%d", i), regs.Regs[i], need) - } - } - // Check tls. - if need := ^uint64(11); regs.TPIDR_EL0 != need { - err = addRegisterMismatch(err, "tpdir_el0", regs.TPIDR_EL0, need) - } - return -} diff --git a/pkg/sentry/platform/kvm/testutil/testutil_arm64.s b/pkg/sentry/platform/kvm/testutil/testutil_arm64.s deleted file mode 100644 index 42876245a..000000000 --- a/pkg/sentry/platform/kvm/testutil/testutil_arm64.s +++ /dev/null @@ -1,169 +0,0 @@ -// Copyright 2019 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// +build arm64 - -// test_util_arm64.s provides ARM64 test functions. - -#include "funcdata.h" -#include "textflag.h" - -#define SYS_GETPID 172 - -// This function simulates the getpid syscall. -TEXT ·Getpid(SB),NOSPLIT,$0 - NO_LOCAL_POINTERS - MOVD $SYS_GETPID, R8 - SVC - RET - -TEXT ·AddrOfGetpid(SB),NOSPLIT,$0-8 - MOVD $·Getpid(SB), R0 - MOVD R0, ret+0(FP) - RET - -TEXT ·Touch(SB),NOSPLIT,$0 -start: - MOVD 0(R8), R1 - MOVD $SYS_GETPID, R8 // getpid - SVC - B start - -TEXT ·AddrOfTouch(SB),NOSPLIT,$0-8 - MOVD $·Touch(SB), R0 - MOVD R0, ret+0(FP) - RET - -TEXT ·HaltLoop(SB),NOSPLIT,$0 -start: - HLT - B start - -TEXT ·AddOfHaltLoop(SB),NOSPLIT,$0-8 - MOVD $·HaltLoop(SB), R0 - MOVD R0, ret+0(FP) - RET - -// This function simulates a loop of syscall. -TEXT ·SyscallLoop(SB),NOSPLIT,$0 -start: - SVC - B start - -TEXT ·AddrOfSyscallLoop(SB),NOSPLIT,$0-8 - MOVD $·SyscallLoop(SB), R0 - MOVD R0, ret+0(FP) - RET - -TEXT ·SpinLoop(SB),NOSPLIT,$0 -start: - B start - -TEXT ·AddrOfSpinLoop(SB),NOSPLIT,$0-8 - MOVD $·SpinLoop(SB), R0 - MOVD R0, ret+0(FP) - RET - -TEXT ·TLSWorks(SB),NOSPLIT,$0-8 - NO_LOCAL_POINTERS - MOVD $0x6789, R5 - MSR R5, TPIDR_EL0 - MOVD $SYS_GETPID, R8 // getpid - SVC - MRS TPIDR_EL0, R6 - CMP R5, R6 - BNE isNaN - MOVD $1, R0 - MOVD R0, ret+0(FP) - RET -isNaN: - MOVD $0, ret+0(FP) - RET - -TEXT ·FloatingPointWorks(SB),NOSPLIT,$0-8 - NO_LOCAL_POINTERS - // gc will touch fpsimd, so we should test it. - // such as in <runtime.deductSweepCredit>. - FMOVD $(9.9), F0 - MOVD $SYS_GETPID, R8 // getpid - SVC - FMOVD $(9.9), F1 - FCMPD F0, F1 - BNE isNaN - MOVD $1, R0 - MOVD R0, ret+0(FP) - RET -isNaN: - MOVD $0, ret+0(FP) - RET - -// MVN: bitwise logical NOT -// This case simulates an application that modified R0-R30. -#define TWIDDLE_REGS() \ - MVN R0, R0; \ - MVN R1, R1; \ - MVN R2, R2; \ - MVN R3, R3; \ - MVN R4, R4; \ - MVN R5, R5; \ - MVN R6, R6; \ - MVN R7, R7; \ - MVN R8, R8; \ - MVN R9, R9; \ - MVN R10, R10; \ - MVN R11, R11; \ - MVN R12, R12; \ - MVN R13, R13; \ - MVN R14, R14; \ - MVN R15, R15; \ - MVN R16, R16; \ - MVN R17, R17; \ - MVN R18_PLATFORM, R18_PLATFORM; \ - MVN R19, R19; \ - MVN R20, R20; \ - MVN R21, R21; \ - MVN R22, R22; \ - MVN R23, R23; \ - MVN R24, R24; \ - MVN R25, R25; \ - MVN R26, R26; \ - MVN R27, R27; \ - MVN g, g; \ - MVN R29, R29; \ - MVN R30, R30; - -TEXT ·TwiddleRegsSyscall(SB),NOSPLIT,$0 - TWIDDLE_REGS() - MSR R10, TPIDR_EL0 - // Trapped in el0_svc. - SVC - RET // never reached - -TEXT ·AddrOfTwiddleRegsSyscall(SB),NOSPLIT,$0-8 - MOVD $·TwiddleRegsSyscall(SB), R0 - MOVD R0, ret+0(FP) - RET - -TEXT ·TwiddleRegsFault(SB),NOSPLIT,$0 - TWIDDLE_REGS() - MSR R10, TPIDR_EL0 - // Trapped in el0_ia. - // Branch to Register branches unconditionally to an address in <Rn>. - JMP (R6) // <=> br x6, must fault - RET // never reached - -TEXT ·AddrOfTwiddleRegsFault(SB),NOSPLIT,$0-8 - MOVD $·TwiddleRegsFault(SB), R0 - MOVD R0, ret+0(FP) - RET |