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elf_file_test.go
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elf_file_test.go
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// Copyright (c) 2014, Jan Voung
// All rights reserved.
// Test ELF file utilities.
package main
import (
"debug/elf"
"fmt"
"os"
"os/exec"
"path"
"testing"
"time"
)
func findSectionIndex(name string, f *ElfFile) int {
for i := range f.Shdrs {
if f.Shdrs[i].Sh_name == name {
return i
}
}
panic("Cannot find section w/ name: " + name)
}
func checkSymtabCrtbegin(t *testing.T, f *ElfFile,
st SymbolTable, start_off int, start_size int) {
// crtbegin.o should have:
// *) U _pnacl_wrapper_start which does a few things and then calls _start
// *) U __pnacl_irt_init which sets up the __nacl_read_tp function using
// the startup_info auxv.
// *) T __pnacl_start, the entry point for PNaCl programs.
link_info := GetSymLinkInfo(st)
ht := SymLinkInfoToHash(link_info, st)
sym, ok := ht["_pnacl_wrapper_start"]
ExpectEq(t, true, ok)
ExpectEq(t, "_pnacl_wrapper_start", sym.St_name)
ExpectEq(t, uint8(0), sym.St_other)
ExpectEq(t, elf.SHN_UNDEF, sym.St_shndx)
ExpectEq(t, uint64(0), sym.St_value)
sym, ok = ht["__pnacl_init_irt"]
ExpectEq(t, true, ok)
ExpectEq(t, "__pnacl_init_irt", sym.St_name)
ExpectEq(t, uint8(0), sym.St_other)
ExpectEq(t, elf.SHN_UNDEF, sym.St_shndx)
ExpectEq(t, uint64(0), sym.St_value)
text_index := findSectionIndex(".text", f)
sym, ok = ht["__pnacl_start"]
ExpectEq(t, true, ok)
ExpectEq(t, "__pnacl_start", sym.St_name)
ExpectEq(t, uint8(0), sym.St_other)
ExpectEq(t, elf.SectionIndex(text_index), sym.St_shndx)
// Offset relative to the beginning of the file.
ExpectEq(t, uint64(start_off), sym.St_value)
ExpectEq(t, uint64(start_size), sym.St_size)
}
func TestRelocatableELFX8632(t *testing.T) {
// Just using crtbegin.o for now.
// Want to also test a .o coming from a .pexe.
fname := path.Join(TestX8632BaseDir(), "crtbegin.o")
elf_file := ReadElfFileFname(fname)
ExpectEq(t, elf.ELFCLASS32, elf_file.Header.Class)
ExpectEq(t, elf.ELFDATA2LSB, elf_file.Header.Data)
ExpectEq(t, elf.EV_CURRENT, elf_file.Header.EI_Version)
ExpectEq(t, elf.ELFOSABI_NONE, elf_file.Header.OSABI)
ExpectEq(t, uint8(0), elf_file.Header.ABIVersion)
ExpectEq(t, elf.ET_REL, elf_file.Header.Type)
ExpectEq(t, elf.EM_386, elf_file.Header.Machine)
ExpectEq(t, uint32(1), elf_file.Header.E_Version)
ExpectEq(t, uint64(0), elf_file.Header.Entry)
ExpectEq(t, uint64(0), elf_file.Header.Phoff)
ExpectEq(t, uint64(412), elf_file.Header.Shoff)
ExpectEq(t, uint32(0), elf_file.Header.Flags)
ExpectEq(t, uint16(52), elf_file.Header.FileHeaderSize)
ExpectEq(t, uint16(0), elf_file.Header.Phentsize)
ExpectEq(t, uint16(0), elf_file.Header.Phnum)
ExpectEq(t, uint16(40), elf_file.Header.Shentsize)
ExpectEq(t, uint16(11), elf_file.Header.Shnum)
ExpectEq(t, uint16(8), elf_file.Header.Shstrndx)
ExpectEq(t, 0, len(elf_file.Phdrs))
ExpectEq(t, 11, len(elf_file.Shdrs))
ExpectEq(t,
SectionHeader{Sh_name_index: 0, Sh_name: "", Sh_type: elf.SHT_NULL,
Sh_flags: 0, Sh_addr: 0, Sh_offset: 0, Sh_size: 0,
Sh_link: 0, Sh_info: 0, Sh_addralign: 0, Sh_entsize: 0},
elf_file.Shdrs[0])
ExpectEq(t,
SectionHeader{Sh_name_index: 16, Sh_name: ".group",
Sh_type: elf.SHT_GROUP,
Sh_flags: 0, Sh_addr: 0, Sh_offset: 0x34, Sh_size: 8,
Sh_link: 9, Sh_info: 2, Sh_addralign: 4, Sh_entsize: 4},
elf_file.Shdrs[1])
ExpectEq(t,
SectionHeader{Sh_name_index: 5, Sh_name: ".text",
Sh_type: elf.SHT_PROGBITS,
Sh_flags: elf.SHF_ALLOC | elf.SHF_EXECINSTR,
Sh_addr: 0, Sh_offset: 0x40, Sh_size: 0xe0,
Sh_link: 0, Sh_info: 0, Sh_addralign: 32, Sh_entsize: 0},
elf_file.Shdrs[2])
rel_text_index := 3
ExpectEq(t,
SectionHeader{Sh_name_index: 1, Sh_name: ".rel.text",
Sh_type: elf.SHT_REL,
Sh_flags: 0,
Sh_addr: 0, Sh_offset: 0x5a0, Sh_size: 0x10,
Sh_link: 9, Sh_info: 2, Sh_addralign: 4, Sh_entsize: 8},
elf_file.Shdrs[rel_text_index])
ExpectEq(t,
SectionHeader{Sh_name_index: 65, Sh_name: ".data",
Sh_type: elf.SHT_PROGBITS,
Sh_flags: elf.SHF_WRITE | elf.SHF_ALLOC,
Sh_addr: 0, Sh_offset: 0x120, Sh_size: 0,
Sh_link: 0, Sh_info: 0, Sh_addralign: 4, Sh_entsize: 0},
elf_file.Shdrs[4])
ExpectEq(t,
SectionHeader{Sh_name_index: 11, Sh_name: ".bss",
Sh_type: elf.SHT_NOBITS,
Sh_flags: elf.SHF_WRITE | elf.SHF_ALLOC,
Sh_addr: 0, Sh_offset: 0x120, Sh_size: 0x0,
Sh_link: 0, Sh_info: 0, Sh_addralign: 4, Sh_entsize: 0},
elf_file.Shdrs[5])
ExpectEq(t,
SectionHeader{Sh_name_index: 71, Sh_name: ".note.NaCl.ABI.x86-32",
Sh_type: elf.SHT_NOTE,
Sh_flags: elf.SHF_ALLOC | elf.SHF_GROUP,
Sh_addr: 0, Sh_offset: 0x120, Sh_size: 0x1c,
Sh_link: 0, Sh_info: 0, Sh_addralign: 4, Sh_entsize: 0},
elf_file.Shdrs[6])
ExpectEq(t,
SectionHeader{Sh_name_index: 23, Sh_name: ".note.GNU-stack",
Sh_type: elf.SHT_PROGBITS,
Sh_flags: 0,
Sh_addr: 0, Sh_offset: 0x13c, Sh_size: 0,
Sh_link: 0, Sh_info: 0, Sh_addralign: 1, Sh_entsize: 0},
elf_file.Shdrs[7])
ExpectEq(t,
SectionHeader{Sh_name_index: 39, Sh_name: ".shstrtab",
Sh_type: elf.SHT_STRTAB,
Sh_flags: 0,
Sh_addr: 0, Sh_offset: 0x13c, Sh_size: 0x5d,
Sh_link: 0, Sh_info: 0, Sh_addralign: 1, Sh_entsize: 0},
elf_file.Shdrs[8])
ExpectEq(t,
SectionHeader{Sh_name_index: 57, Sh_name: ".symtab",
Sh_type: elf.SHT_SYMTAB,
Sh_flags: 0,
Sh_addr: 0, Sh_offset: 0x354, Sh_size: 0x110,
Sh_link: 10, Sh_info: 9, Sh_addralign: 4, Sh_entsize: 0x10},
elf_file.Shdrs[9])
ExpectEq(t,
SectionHeader{Sh_name_index: 49, Sh_name: ".strtab",
Sh_type: elf.SHT_STRTAB,
Sh_flags: 0,
Sh_addr: 0, Sh_offset: 0x464, Sh_size: 0x13c,
Sh_link: 0, Sh_info: 0, Sh_addralign: 1, Sh_entsize: 0},
elf_file.Shdrs[10])
// Try reading the symbol table too.
st := elf_file.ReadSymbols()
ExpectEq(t, 17, len(st))
// Check it more deeply.
checkSymtabCrtbegin(t, &elf_file, st, 0xa0, 64)
// Check the relocations for crtbegin.o
rels := elf_file.ReadRel32(rel_text_index)
ExpectEq(t, len(rels), 2)
ExpectEq(t, uint32(0xbc), rels[0].R_off)
ExpectEq(t, uint32(0xf02), rels[0].R_info)
ExpectEq(t, "__pnacl_init_irt", st[Elf32_r_sym(rels[0].R_info)].St_name)
ExpectEq(t, elf.R_386_PC32, elf.R_386(Elf32_r_type(rels[0].R_info)))
ExpectEq(t, uint32(0xc4), rels[1].R_off)
ExpectEq(t, uint32(0x1002), rels[1].R_info)
ExpectEq(t, "_pnacl_wrapper_start",
st[Elf32_r_sym(rels[1].R_info)].St_name)
ExpectEq(t, elf.R_386_PC32, elf.R_386(Elf32_r_type(rels[1].R_info)))
}
func TestRelocatableELFX8664(t *testing.T) {
fname := path.Join(TestX8664BaseDir(), "crtbegin.o")
elf_file := ReadElfFileFname(fname)
// Will eventually be ELFCLASS32 also, for NaCl x86-64.
ExpectEq(t, elf.ELFCLASS64, elf_file.Header.Class)
ExpectEq(t, elf.ELFDATA2LSB, elf_file.Header.Data)
ExpectEq(t, elf.EV_CURRENT, elf_file.Header.EI_Version)
ExpectEq(t, elf.ELFOSABI_NONE, elf_file.Header.OSABI)
ExpectEq(t, uint8(0), elf_file.Header.ABIVersion)
ExpectEq(t, elf.ET_REL, elf_file.Header.Type)
ExpectEq(t, elf.EM_X86_64, elf_file.Header.Machine)
ExpectEq(t, uint32(1), elf_file.Header.E_Version)
ExpectEq(t, uint64(0), elf_file.Header.Entry)
ExpectEq(t, uint64(0), elf_file.Header.Phoff)
ExpectEq(t, uint64(448), elf_file.Header.Shoff)
ExpectEq(t, uint32(0), elf_file.Header.Flags)
ExpectEq(t, uint16(64), elf_file.Header.FileHeaderSize)
ExpectEq(t, uint16(0), elf_file.Header.Phentsize)
ExpectEq(t, uint16(0), elf_file.Header.Phnum)
ExpectEq(t, uint16(64), elf_file.Header.Shentsize)
ExpectEq(t, uint16(11), elf_file.Header.Shnum)
ExpectEq(t, uint16(8), elf_file.Header.Shstrndx)
ExpectEq(t, 0, len(elf_file.Phdrs))
ExpectEq(t, 11, len(elf_file.Shdrs))
ExpectEq(t,
SectionHeader{Sh_name_index: 0, Sh_name: "", Sh_type: elf.SHT_NULL,
Sh_flags: 0, Sh_addr: 0, Sh_offset: 0, Sh_size: 0,
Sh_link: 0, Sh_info: 0, Sh_addralign: 0, Sh_entsize: 0},
elf_file.Shdrs[0])
ExpectEq(t,
SectionHeader{Sh_name_index: 17, Sh_name: ".group",
Sh_type: elf.SHT_GROUP,
Sh_flags: 0, Sh_addr: 0, Sh_offset: 0x40, Sh_size: 8,
Sh_link: 9, Sh_info: 2, Sh_addralign: 4, Sh_entsize: 4},
elf_file.Shdrs[1])
ExpectEq(t,
SectionHeader{Sh_name_index: 6, Sh_name: ".text",
Sh_type: elf.SHT_PROGBITS,
Sh_flags: elf.SHF_ALLOC | elf.SHF_EXECINSTR,
Sh_addr: 0, Sh_offset: 0x60, Sh_size: 0xe0,
Sh_link: 0, Sh_info: 0, Sh_addralign: 32, Sh_entsize: 0},
elf_file.Shdrs[2])
rela_text_index := 3
ExpectEq(t,
SectionHeader{Sh_name_index: 1, Sh_name: ".rela.text",
Sh_type: elf.SHT_RELA,
Sh_flags: 0,
Sh_addr: 0, Sh_offset: 0x758, Sh_size: 0x48,
Sh_link: 9, Sh_info: 2, Sh_addralign: 8, Sh_entsize: 0x18},
elf_file.Shdrs[rela_text_index])
ExpectEq(t,
SectionHeader{Sh_name_index: 66, Sh_name: ".data",
Sh_type: elf.SHT_PROGBITS,
Sh_flags: elf.SHF_WRITE | elf.SHF_ALLOC,
Sh_addr: 0, Sh_offset: 0x140, Sh_size: 0,
Sh_link: 0, Sh_info: 0, Sh_addralign: 4, Sh_entsize: 0},
elf_file.Shdrs[4])
ExpectEq(t,
SectionHeader{Sh_name_index: 12, Sh_name: ".bss",
Sh_type: elf.SHT_NOBITS,
Sh_flags: elf.SHF_WRITE | elf.SHF_ALLOC,
Sh_addr: 0, Sh_offset: 0x140, Sh_size: 0x0,
Sh_link: 0, Sh_info: 0, Sh_addralign: 4, Sh_entsize: 0},
elf_file.Shdrs[5])
ExpectEq(t,
SectionHeader{Sh_name_index: 72, Sh_name: ".note.NaCl.ABI.x86-64",
Sh_type: elf.SHT_NOTE,
Sh_flags: elf.SHF_ALLOC | elf.SHF_GROUP,
Sh_addr: 0, Sh_offset: 0x140, Sh_size: 0x1c,
Sh_link: 0, Sh_info: 0, Sh_addralign: 4, Sh_entsize: 0},
elf_file.Shdrs[6])
ExpectEq(t,
SectionHeader{Sh_name_index: 24, Sh_name: ".note.GNU-stack",
Sh_type: elf.SHT_PROGBITS,
Sh_flags: 0,
Sh_addr: 0, Sh_offset: 0x15c, Sh_size: 0,
Sh_link: 0, Sh_info: 0, Sh_addralign: 1, Sh_entsize: 0},
elf_file.Shdrs[7])
ExpectEq(t,
SectionHeader{Sh_name_index: 40, Sh_name: ".shstrtab",
Sh_type: elf.SHT_STRTAB,
Sh_flags: 0,
Sh_addr: 0, Sh_offset: 0x15c, Sh_size: 0x5e,
Sh_link: 0, Sh_info: 0, Sh_addralign: 1, Sh_entsize: 0},
elf_file.Shdrs[8])
ExpectEq(t,
SectionHeader{Sh_name_index: 58, Sh_name: ".symtab",
Sh_type: elf.SHT_SYMTAB,
Sh_flags: 0,
Sh_addr: 0, Sh_offset: 0x480, Sh_size: 0x198,
Sh_link: 10, Sh_info: 9, Sh_addralign: 8, Sh_entsize: 0x18},
elf_file.Shdrs[9])
ExpectEq(t,
SectionHeader{Sh_name_index: 50, Sh_name: ".strtab",
Sh_type: elf.SHT_STRTAB,
Sh_flags: 0,
Sh_addr: 0, Sh_offset: 0x618, Sh_size: 0x13c,
Sh_link: 0, Sh_info: 0, Sh_addralign: 1, Sh_entsize: 0},
elf_file.Shdrs[10])
st := elf_file.ReadSymbols()
ExpectEq(t, 17, len(st))
// Check it more deeply.
checkSymtabCrtbegin(t, &elf_file, st, 0xa0, 64)
rels := elf_file.ReadRela64(rela_text_index)
ExpectEq(t, len(rels), 3)
ExpectEq(t, uint64(0xa4), rels[0].R_off)
ExpectEq(t, uint64(0x00030000000b), rels[0].R_info)
ExpectEq(t, int64(0xc0), rels[0].R_addend)
ExpectEq(t, elf.R_X86_64_32S,
elf.R_X86_64(Elf64_r_type(rels[0].R_info)))
ExpectEq(t, elf.STT_SECTION,
St_type(st[Elf64_r_sym(rels[0].R_info)].St_info))
ExpectEq(t, ".text",
elf_file.Shdrs[st[Elf64_r_sym(rels[0].R_info)].St_shndx].Sh_name)
ExpectEq(t, uint64(0xa9), rels[1].R_off)
ExpectEq(t, uint64(0x000f00000002), rels[1].R_info)
ExpectEq(t, int64(-4), rels[1].R_addend)
ExpectEq(t, elf.R_X86_64_PC32,
elf.R_X86_64(Elf64_r_type(rels[1].R_info)))
ExpectEq(t, elf.STT_NOTYPE,
St_type(st[Elf64_r_sym(rels[1].R_info)].St_info))
ExpectEq(t, "__pnacl_init_irt",
st[Elf64_r_sym(rels[1].R_info)].St_name)
ExpectEq(t, uint64(0xc4), rels[2].R_off)
ExpectEq(t, uint64(0x001000000002), rels[2].R_info)
ExpectEq(t, int64(-4), rels[2].R_addend)
ExpectEq(t, elf.R_X86_64_PC32,
elf.R_X86_64(Elf64_r_type(rels[2].R_info)))
ExpectEq(t, elf.STT_NOTYPE,
St_type(st[Elf64_r_sym(rels[2].R_info)].St_info))
ExpectEq(t, "_pnacl_wrapper_start",
st[Elf64_r_sym(rels[2].R_info)].St_name)
}
func TestRelocatableELFARM(t *testing.T) {
fname := path.Join(TestARMBaseDir(), "crtbegin.o")
elf_file := ReadElfFileFname(fname)
ExpectEq(t, elf.ELFCLASS32, elf_file.Header.Class)
ExpectEq(t, elf.ELFDATA2LSB, elf_file.Header.Data)
ExpectEq(t, elf.EV_CURRENT, elf_file.Header.EI_Version)
ExpectEq(t, elf.ELFOSABI_NONE, elf_file.Header.OSABI)
ExpectEq(t, uint8(0), elf_file.Header.ABIVersion)
ExpectEq(t, elf.ET_REL, elf_file.Header.Type)
ExpectEq(t, elf.EM_ARM, elf_file.Header.Machine)
ExpectEq(t, uint32(1), elf_file.Header.E_Version)
ExpectEq(t, uint64(0), elf_file.Header.Entry)
ExpectEq(t, uint64(0), elf_file.Header.Phoff)
ExpectEq(t, uint64(372), elf_file.Header.Shoff)
ExpectEq(t, uint32(0x5000000), elf_file.Header.Flags)
ExpectEq(t, uint16(52), elf_file.Header.FileHeaderSize)
ExpectEq(t, uint16(0), elf_file.Header.Phentsize)
ExpectEq(t, uint16(0), elf_file.Header.Phnum)
ExpectEq(t, uint16(40), elf_file.Header.Shentsize)
ExpectEq(t, uint16(11), elf_file.Header.Shnum)
ExpectEq(t, uint16(8), elf_file.Header.Shstrndx)
ExpectEq(t, 0, len(elf_file.Phdrs))
ExpectEq(t, 11, len(elf_file.Shdrs))
ExpectEq(t,
SectionHeader{Sh_name_index: 0, Sh_name: "", Sh_type: elf.SHT_NULL,
Sh_flags: 0, Sh_addr: 0, Sh_offset: 0, Sh_size: 0,
Sh_link: 0, Sh_info: 0, Sh_addralign: 0, Sh_entsize: 0},
elf_file.Shdrs[0])
ExpectEq(t,
SectionHeader{Sh_name_index: 32, Sh_name: ".group",
Sh_type: elf.SHT_GROUP,
Sh_flags: 0, Sh_addr: 0, Sh_offset: 0x34, Sh_size: 8,
Sh_link: 9, Sh_info: 5, Sh_addralign: 4, Sh_entsize: 4},
elf_file.Shdrs[1])
ExpectEq(t,
SectionHeader{Sh_name_index: 5, Sh_name: ".text",
Sh_type: elf.SHT_PROGBITS,
Sh_flags: elf.SHF_ALLOC | elf.SHF_EXECINSTR,
Sh_addr: 0, Sh_offset: 0x40, Sh_size: 0x98,
Sh_link: 0, Sh_info: 0, Sh_addralign: 16, Sh_entsize: 0},
elf_file.Shdrs[2])
rel_text_index := 3
ExpectEq(t,
SectionHeader{Sh_name_index: 1, Sh_name: ".rel.text",
Sh_type: elf.SHT_REL,
Sh_flags: 0,
Sh_addr: 0, Sh_offset: 0x5b4, Sh_size: 0x10,
Sh_link: 9, Sh_info: 2, Sh_addralign: 4, Sh_entsize: 8},
elf_file.Shdrs[rel_text_index])
ExpectEq(t,
SectionHeader{Sh_name_index: 84, Sh_name: ".data",
Sh_type: elf.SHT_PROGBITS,
Sh_flags: elf.SHF_WRITE | elf.SHF_ALLOC,
Sh_addr: 0, Sh_offset: 0xd8, Sh_size: 0,
Sh_link: 0, Sh_info: 0, Sh_addralign: 4, Sh_entsize: 0},
elf_file.Shdrs[4])
ExpectEq(t,
SectionHeader{Sh_name_index: 11, Sh_name: ".bss",
Sh_type: elf.SHT_NOBITS,
Sh_flags: elf.SHF_WRITE | elf.SHF_ALLOC,
Sh_addr: 0, Sh_offset: 0xd8, Sh_size: 0x0,
Sh_link: 0, Sh_info: 0, Sh_addralign: 4, Sh_entsize: 0},
elf_file.Shdrs[5])
SHT_ARM_ATTRIBUTES := elf.SectionType(0x70000003)
ExpectEq(t,
SectionHeader{Sh_name_index: 16, Sh_name: ".ARM.attributes",
Sh_type: SHT_ARM_ATTRIBUTES,
Sh_flags: 0,
Sh_addr: 0, Sh_offset: 0xd8, Sh_size: 0x26,
Sh_link: 0, Sh_info: 0, Sh_addralign: 1, Sh_entsize: 0},
elf_file.Shdrs[6])
ExpectEq(t,
SectionHeader{Sh_name_index: 39, Sh_name: ".note.NaCl.ABI.arm",
Sh_type: elf.SHT_NOTE,
Sh_flags: elf.SHF_ALLOC | elf.SHF_GROUP,
Sh_addr: 0, Sh_offset: 0x100, Sh_size: 0x18,
Sh_link: 0, Sh_info: 0, Sh_addralign: 4, Sh_entsize: 0},
elf_file.Shdrs[7])
ExpectEq(t,
SectionHeader{Sh_name_index: 58, Sh_name: ".shstrtab",
Sh_type: elf.SHT_STRTAB,
Sh_flags: 0,
Sh_addr: 0, Sh_offset: 0x118, Sh_size: 0x5a,
Sh_link: 0, Sh_info: 0, Sh_addralign: 1, Sh_entsize: 0},
elf_file.Shdrs[8])
ExpectEq(t,
SectionHeader{Sh_name_index: 76, Sh_name: ".symtab",
Sh_type: elf.SHT_SYMTAB,
Sh_flags: 0,
Sh_addr: 0, Sh_offset: 0x32c, Sh_size: 0x140,
Sh_link: 10, Sh_info: 12, Sh_addralign: 4, Sh_entsize: 0x10},
elf_file.Shdrs[9])
ExpectEq(t,
SectionHeader{Sh_name_index: 68, Sh_name: ".strtab",
Sh_type: elf.SHT_STRTAB,
Sh_flags: 0,
Sh_addr: 0, Sh_offset: 0x46c, Sh_size: 0x145,
Sh_link: 0, Sh_info: 0, Sh_addralign: 1, Sh_entsize: 0},
elf_file.Shdrs[10])
st := elf_file.ReadSymbols()
ExpectEq(t, 20, len(st))
// Check it more deeply.
checkSymtabCrtbegin(t, &elf_file, st, 0x50, 72)
// Check the relocations for crtbegin.o
rels := elf_file.ReadRel32(rel_text_index)
ExpectEq(t, len(rels), 2)
ExpectEq(t, uint32(0x6c), rels[0].R_off)
ExpectEq(t, uint32(0x121c), rels[0].R_info)
ExpectEq(t, "__pnacl_init_irt", st[Elf32_r_sym(rels[0].R_info)].St_name)
ExpectEq(t, elf.R_ARM_PLT32 + 1, // Should be R_ARM_CALL...
elf.R_ARM(Elf32_r_type(rels[0].R_info)))
ExpectEq(t, uint32(0x7c), rels[1].R_off)
ExpectEq(t, uint32(0x131c), rels[1].R_info)
ExpectEq(t, "_pnacl_wrapper_start",
st[Elf32_r_sym(rels[1].R_info)].St_name)
ExpectEq(t, elf.R_ARM_PLT32 + 1, // Should be R_ARM_CALL...
elf.R_ARM(Elf32_r_type(rels[1].R_info)))
}
func alignTo(addr uint64, alignment uint64) uint64 {
diff := (alignment - (addr % alignment)) % alignment
return addr + diff
}
func checkExecutableX8632NaCl(t *testing.T, fname string) {
elf_file := ReadElfFileFname(fname)
ExpectEq(t, elf.ELFCLASS32, elf_file.Header.Class)
ExpectEq(t, elf.ELFDATA2LSB, elf_file.Header.Data)
ExpectEq(t, elf.EV_CURRENT, elf_file.Header.EI_Version)
ExpectEq(t, elf.ELFOSABI_NONE, elf_file.Header.OSABI)
ExpectEq(t, uint8(0), elf_file.Header.ABIVersion)
ExpectEq(t, elf.ET_EXEC, elf_file.Header.Type)
ExpectEq(t, elf.EM_386, elf_file.Header.Machine)
ExpectEq(t, 6, len(elf_file.Phdrs))
// Check Phdrs
ExpectEq(t, elf_file.Phdrs[0].P_type, elf.PT_LOAD)
ExpectEq(t, elf_file.Phdrs[0].P_flags, elf.PF_R|elf.PF_X)
ExpectEq(t, elf_file.Phdrs[0].P_offset, uint64(0x10000))
ExpectEq(t, elf_file.Phdrs[0].P_vaddr, uint64(0x20000))
ExpectEq(t, elf_file.Phdrs[0].P_paddr, uint64(0x20000))
// Skip the sizes, because they can change.
ExpectEq(t, elf_file.Phdrs[0].P_align, uint64(0x10000))
ExpectEq(t, elf_file.Phdrs[1].P_type, elf.PT_LOAD)
ExpectEq(t, elf_file.Phdrs[1].P_flags, elf.PF_R)
ExpectEq(t, elf_file.Phdrs[1].P_offset, uint64(0))
ExpectEq(t, elf_file.Phdrs[1].P_vaddr, uint64(0x10020000))
ExpectEq(t, elf_file.Phdrs[1].P_paddr, uint64(0x10020000))
// Skip the sizes, because they can change.
ExpectEq(t, elf_file.Phdrs[1].P_align, uint64(0x10000))
ExpectEq(t, elf_file.Phdrs[2].P_type, elf.PT_LOAD)
ExpectEq(t, elf_file.Phdrs[2].P_flags, elf.PF_R|elf.PF_W)
// relative to the size of the previous segment.
ExpectEq(t, elf_file.Phdrs[2].P_offset,
alignTo(elf_file.Phdrs[1].P_filesz, 32))
ExpectEq(t, elf_file.Phdrs[2].P_vaddr,
alignTo(uint64(0x10030000+elf_file.Phdrs[1].P_filesz), 32))
ExpectEq(t, elf_file.Phdrs[2].P_paddr,
alignTo(uint64(0x10030000+elf_file.Phdrs[1].P_filesz), 32))
// Skip the sizes, because they can change.
ExpectEq(t, elf_file.Phdrs[0].P_align, uint64(0x10000))
}
func checkExecutableX8664NaCl(t *testing.T, fname string) {
elf_file := ReadElfFileFname(fname)
ExpectEq(t, elf.ELFCLASS64, elf_file.Header.Class)
ExpectEq(t, elf.ELFDATA2LSB, elf_file.Header.Data)
ExpectEq(t, elf.EV_CURRENT, elf_file.Header.EI_Version)
ExpectEq(t, elf.ELFOSABI_NONE, elf_file.Header.OSABI)
ExpectEq(t, uint8(0), elf_file.Header.ABIVersion)
ExpectEq(t, elf.ET_EXEC, elf_file.Header.Type)
ExpectEq(t, elf.EM_X86_64, elf_file.Header.Machine)
ExpectEq(t, 6, len(elf_file.Phdrs))
// Check Phdrs
ExpectEq(t, elf_file.Phdrs[0].P_type, elf.PT_LOAD)
ExpectEq(t, elf_file.Phdrs[0].P_flags, elf.PF_R|elf.PF_X)
ExpectEq(t, elf_file.Phdrs[0].P_offset, uint64(0x10000))
ExpectEq(t, elf_file.Phdrs[0].P_vaddr, uint64(0x20000))
ExpectEq(t, elf_file.Phdrs[0].P_paddr, uint64(0x20000))
// Skip the sizes, because they can change.
ExpectEq(t, elf_file.Phdrs[0].P_align, uint64(0x10000))
ExpectEq(t, elf_file.Phdrs[1].P_type, elf.PT_LOAD)
ExpectEq(t, elf_file.Phdrs[1].P_flags, elf.PF_R)
ExpectEq(t, elf_file.Phdrs[1].P_offset, uint64(0))
ExpectEq(t, elf_file.Phdrs[1].P_vaddr, uint64(0x10020000))
ExpectEq(t, elf_file.Phdrs[1].P_paddr, uint64(0x10020000))
// Skip the sizes, because they can change.
ExpectEq(t, elf_file.Phdrs[1].P_align, uint64(0x10000))
ExpectEq(t, elf_file.Phdrs[2].P_type, elf.PT_LOAD)
ExpectEq(t, elf_file.Phdrs[2].P_flags, elf.PF_R|elf.PF_W)
// relative to the size of the previous segment.
ExpectEq(t, elf_file.Phdrs[2].P_offset,
alignTo(elf_file.Phdrs[1].P_filesz, 32))
ExpectEq(t, elf_file.Phdrs[2].P_vaddr,
alignTo(uint64(0x10030000+elf_file.Phdrs[1].P_filesz), 32))
ExpectEq(t, elf_file.Phdrs[2].P_paddr,
alignTo(uint64(0x10030000+elf_file.Phdrs[1].P_filesz), 32))
// Skip the sizes, because they can change.
ExpectEq(t, elf_file.Phdrs[0].P_align, uint64(0x10000))
}
func checkExecutableARMNaCl(t *testing.T, fname string) {
elf_file := ReadElfFileFname(fname)
ExpectEq(t, elf.ELFCLASS32, elf_file.Header.Class)
ExpectEq(t, elf.ELFDATA2LSB, elf_file.Header.Data)
ExpectEq(t, elf.EV_CURRENT, elf_file.Header.EI_Version)
ExpectEq(t, elf.ELFOSABI_NONE, elf_file.Header.OSABI)
ExpectEq(t, uint8(0), elf_file.Header.ABIVersion)
ExpectEq(t, elf.ET_EXEC, elf_file.Header.Type)
ExpectEq(t, elf.EM_ARM, elf_file.Header.Machine)
// The ARM one doesn't have a GNU_STACK segment so it's only 5 segments.
ExpectEq(t, 5, len(elf_file.Phdrs))
// Check Phdrs
ExpectEq(t, elf_file.Phdrs[0].P_type, elf.PT_LOAD)
ExpectEq(t, elf_file.Phdrs[0].P_flags, elf.PF_R|elf.PF_X)
ExpectEq(t, elf_file.Phdrs[0].P_offset, uint64(0x10000))
ExpectEq(t, elf_file.Phdrs[0].P_vaddr, uint64(0x20000))
ExpectEq(t, elf_file.Phdrs[0].P_paddr, uint64(0x20000))
// Skip the sizes, because they can change.
ExpectEq(t, elf_file.Phdrs[0].P_align, uint64(0x10000))
ExpectEq(t, elf_file.Phdrs[1].P_type, elf.PT_LOAD)
ExpectEq(t, elf_file.Phdrs[1].P_flags, elf.PF_R)
ExpectEq(t, elf_file.Phdrs[1].P_offset, uint64(0))
ExpectEq(t, elf_file.Phdrs[1].P_vaddr, uint64(0x10020000))
ExpectEq(t, elf_file.Phdrs[1].P_paddr, uint64(0x10020000))
// Skip the sizes, because they can change.
ExpectEq(t, elf_file.Phdrs[1].P_align, uint64(0x10000))
ExpectEq(t, elf_file.Phdrs[2].P_type, elf.PT_LOAD)
ExpectEq(t, elf_file.Phdrs[2].P_flags, elf.PF_R|elf.PF_W)
// relative to the size of the previous segment.
// TODO(jvoung): what is the alignment requirement???
ExpectEq(t, elf_file.Phdrs[2].P_offset,
alignTo(elf_file.Phdrs[1].P_filesz, 8))
ExpectEq(t, elf_file.Phdrs[2].P_vaddr,
alignTo(uint64(0x10030000+elf_file.Phdrs[1].P_filesz), 8))
ExpectEq(t, elf_file.Phdrs[2].P_paddr,
alignTo(uint64(0x10030000+elf_file.Phdrs[1].P_filesz), 8))
// Skip the sizes, because they can change.
ExpectEq(t, elf_file.Phdrs[0].P_align, uint64(0x10000))
}
func lastModTime(files []string, can_skip bool) time.Time {
t := time.Time{}
for _, fname := range files {
stat, err := os.Stat(fname)
if err != nil {
if can_skip {
continue
} else {
panic("Failed to stat: " + fname)
}
}
if stat.ModTime().After(t) {
t = stat.ModTime()
}
}
return t
}
func naclTestDataOld(infiles, outfiles []string) bool {
max_in_mod := lastModTime(infiles, false)
max_out_mod := lastModTime(outfiles, true)
return max_in_mod.After(max_out_mod)
}
func TestNaClExecutable(t *testing.T) {
// Use the test_binary shell script to generate a NaCl .nexe
// then read it.
infiles := []string{path.Join(TestBaseDir, "test_relocs.sh"),
path.Join(TestBaseDir, "test_relocs.c")}
outdirs := []string{TestX8632BaseDir(), TestX8664BaseDir(),
TestARMBaseDir()}
outfiles := []string{"test_relocs.o",
"test_relocs.nexe",
"test_relocs.nexe---test_relocs.final.pexe---.o"}
joined_of := []string{}
for _, od := range outdirs {
for _, of := range outfiles {
joined_of = append(joined_of, path.Join(od, of))
}
}
if naclTestDataOld(infiles, joined_of) {
fmt.Println("Need to regenerate relocs test binaries: test_relocs.sh")
cmd := exec.Command(path.Join(TestBaseDir, "test_relocs.sh"))
err := cmd.Run()
if err != nil {
t.Fatal(err)
}
}
checkExecutableX8632NaCl(
t, path.Join(TestX8632BaseDir(), "test_relocs.nexe"))
checkExecutableX8664NaCl(
t, path.Join(TestX8664BaseDir(), "test_relocs.nexe"))
checkExecutableARMNaCl(
t, path.Join(TestARMBaseDir(), "test_relocs.nexe"))
}