由於無效的ELF頭文件，MIPS仿真程序無法運行mips可執行文件

Question

所以我想開始編寫一些mips程序集，並設置我的工具。 我正在使用Arch Linux，並從用戶存儲庫安裝了交叉mipsel-linux-gnu-gcc和binutils，這很好用，並且成功地將我的簡單測試程序編譯爲mipsel二進制文件。

我不想要任何花式的gui或類似的東西來模仿我，並且去了qemu。這是我有問題。當我嘗試運行我的可執行文件qemu-mipsel ./test時，qemu只是回覆./test: Invalid ELF image for this architecture。

的第一件事，我雖然是「可以QEMU真的只是運行基地MIPS的二進制文件這樣呢？這看起來幾乎像魔術，這不可能是正確的。」，所以我就開始使用Google，如果它實際上是可能的，found a tutorial on how to to similar compilation for a openwrt but with C code <，在看完這篇教程之後，我的步驟似乎也應該起作用。

這是我編的組裝，清潔，簡單的命令 mipsel-linux-gnu-as test.asm -o test; chmod +x ./test

這裏的file命令 ./test: ELF 32-bit LSB relocatable, MIPS, MIPS-I version 1 (SYSV), not stripped

這裏的輸出年代readelf -a ./test

ELF Header: 
    Magic: 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00 
    Class:        ELF32 
    Data:        2's complement, little endian 
    Version:       1 (current) 
    OS/ABI:       UNIX - System V 
    ABI Version:      0 
    Type:        REL (Relocatable file) 
    Machine:       MIPS R3000 
    Version:       0x1 
    Entry point address:    0x0 
    Start of program headers:   0 (bytes into file) 
    Start of section headers:   164 (bytes into file) 
    Flags:        0x1000, o32, mips1 
    Size of this header:    52 (bytes) 
    Size of program headers:   0 (bytes) 
    Number of program headers:   0 
    Size of section headers:   40 (bytes) 
    Number of section headers:   9 
    Section header string table index: 6 

Section Headers: 
    [Nr] Name    Type   Addr  Off Size ES Flg Lk Inf Al 
    [ 0]     NULL   00000000 000000 000000 00  0 0 0 
    [ 1] .text    PROGBITS  00000000 000040 000010 00 AX 0 0 16 
    [ 2] .data    PROGBITS  00000000 000050 000000 00 WA 0 0 16 
    [ 3] .bss    NOBITS   00000000 000050 000000 00 WA 0 0 16 
    [ 4] .reginfo   MIPS_REGINFO 00000000 000050 000018 18 A 0 0 4 
    [ 5] .pdr    PROGBITS  00000000 000068 000000 00  0 0 4 
    [ 6] .shstrtab   STRTAB   00000000 000068 00003a 00  0 0 1 
    [ 7] .symtab   SYMTAB   00000000 00020c 000060 10  8 6 4 
    [ 8] .strtab   STRTAB   00000000 00026c 000001 00  0 0 1 
Key to Flags: 
    W (write), A (alloc), X (execute), M (merge), S (strings) 
    I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown) 
    O (extra OS processing required) o (OS specific), p (processor specific) 

There are no section groups in this file. 

There are no program headers in this file. 

There are no relocations in this file. 

The decoding of unwind sections for machine type MIPS R3000 is not currently supported. 

Symbol table '.symtab' contains 6 entries: 
    Num: Value Size Type Bind Vis  Ndx Name 
    0: 00000000  0 NOTYPE LOCAL DEFAULT UND 
    1: 00000000  0 SECTION LOCAL DEFAULT 1 
    2: 00000000  0 SECTION LOCAL DEFAULT 2 
    3: 00000000  0 SECTION LOCAL DEFAULT 3 
    4: 00000000  0 SECTION LOCAL DEFAULT 4 
    5: 00000000  0 SECTION LOCAL DEFAULT 5 

No version information found in this file. 

Answer 1

輸出你已經忘記鏈接你的代碼。彙編程序as只產生目標文件，你需要鏈接它。想必你想要的東西，如：

mipsel-linux-gnu-as test.asm -o test.o 
mipsel-linux-gnu-ld test.o -o test 

如果你這樣做是正確的file命令的輸出應包括executable，如：

ELF 32-bit LSB executable, MIPS, MIPS-I version 1 (SYSV), statically linked, not stripped