| // Copyright 2014 Google Inc. All Rights Reserved. |
| // |
| // 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 elfexec |
| |
| import ( |
| "debug/elf" |
| "testing" |
| ) |
| |
| func TestGetBase(t *testing.T) { |
| |
| fhExec := &elf.FileHeader{ |
| Type: elf.ET_EXEC, |
| } |
| fhRel := &elf.FileHeader{ |
| Type: elf.ET_REL, |
| } |
| fhDyn := &elf.FileHeader{ |
| Type: elf.ET_DYN, |
| } |
| lsOffset := &elf.ProgHeader{ |
| Vaddr: 0x400000, |
| Off: 0x200000, |
| } |
| kernelHeader := &elf.ProgHeader{ |
| Vaddr: 0xffffffff81000000, |
| } |
| ppc64KernelHeader := &elf.ProgHeader{ |
| Vaddr: 0xc000000000000000, |
| } |
| |
| testcases := []struct { |
| label string |
| fh *elf.FileHeader |
| loadSegment *elf.ProgHeader |
| stextOffset *uint64 |
| start, limit, offset uint64 |
| want uint64 |
| wanterr bool |
| }{ |
| {"exec", fhExec, nil, nil, 0x400000, 0, 0, 0, false}, |
| {"exec offset", fhExec, lsOffset, nil, 0x400000, 0x800000, 0, 0, false}, |
| {"exec offset 2", fhExec, lsOffset, nil, 0x200000, 0x600000, 0, 0, false}, |
| {"exec nomap", fhExec, nil, nil, 0, 0, 0, 0, false}, |
| {"exec kernel", fhExec, kernelHeader, uint64p(0xffffffff81000198), 0xffffffff82000198, 0xffffffff83000198, 0, 0x1000000, false}, |
| {"exec kernel", fhExec, kernelHeader, uint64p(0xffffffff810002b8), 0xffffffff81000000, 0xffffffffa0000000, 0x0, 0x0, false}, |
| {"exec kernel ASLR", fhExec, kernelHeader, uint64p(0xffffffff810002b8), 0xffffffff81000000, 0xffffffffa0000000, 0xffffffff81000000, 0x0, false}, |
| {"exec PPC64 kernel", fhExec, ppc64KernelHeader, uint64p(0xc000000000000000), 0xc000000000000000, 0xd00000001a730000, 0x0, 0x0, false}, |
| {"exec chromeos kernel", fhExec, kernelHeader, uint64p(0xffffffff81000198), 0, 0x10197, 0, 0x7efffe68, false}, |
| {"exec chromeos kernel 2", fhExec, kernelHeader, uint64p(0xffffffff81000198), 0, 0x10198, 0, 0x7efffe68, false}, |
| {"exec chromeos kernel 3", fhExec, kernelHeader, uint64p(0xffffffff81000198), 0x198, 0x100000, 0, 0x7f000000, false}, |
| {"exec chromeos kernel 4", fhExec, kernelHeader, uint64p(0xffffffff81200198), 0x198, 0x100000, 0, 0x7ee00000, false}, |
| {"exec chromeos kernel unremapped", fhExec, kernelHeader, uint64p(0xffffffff810001c8), 0xffffffff834001c8, 0xffffffffc0000000, 0xffffffff834001c8, 0x2400000, false}, |
| {"dyn", fhDyn, nil, nil, 0x200000, 0x300000, 0, 0x200000, false}, |
| {"dyn map", fhDyn, lsOffset, nil, 0x0, 0x300000, 0, 0xFFFFFFFFFFE00000, false}, |
| {"dyn nomap", fhDyn, nil, nil, 0x0, 0x0, 0, 0, false}, |
| {"dyn map+offset", fhDyn, lsOffset, nil, 0x900000, 0xa00000, 0x200000, 0x500000, false}, |
| {"rel", fhRel, nil, nil, 0x2000000, 0x3000000, 0, 0x2000000, false}, |
| {"rel nomap", fhRel, nil, nil, 0x0, ^uint64(0), 0, 0, false}, |
| {"rel offset", fhRel, nil, nil, 0x100000, 0x200000, 0x1, 0, true}, |
| } |
| |
| for _, tc := range testcases { |
| base, err := GetBase(tc.fh, tc.loadSegment, tc.stextOffset, tc.start, tc.limit, tc.offset) |
| if err != nil { |
| if !tc.wanterr { |
| t.Errorf("%s: want no error, got %v", tc.label, err) |
| } |
| continue |
| } |
| if tc.wanterr { |
| t.Errorf("%s: want error, got nil", tc.label) |
| continue |
| } |
| if base != tc.want { |
| t.Errorf("%s: want %x, got %x", tc.label, tc.want, base) |
| } |
| } |
| } |
| |
| func uint64p(n uint64) *uint64 { |
| return &n |
| } |