Il Wednesday 13 February 2008 00:39:59 Edin Hodzic ha scritto:
> -march=mips1 or -mips1 should do the trick, no?
>
> Dino
>
> On 02/12/2008 03:34 PM, Matteo Croce said:
> > Hi,
> > I have a machine, an AR7 MIPS router I want to hack, but I'm unable
> > to run _any_ executable on that machine outside the ones in the firmware.
> > I tried building a static mips1 binary, but it fails so:
> >
> > # /var/test.bin
> > /var/test.bin: 1: Syntax error: "(" unexpected
> >
> > so I downloaded a binary builtin in the firmware and I compared it to my own:
> >
> > $ file busybox.bin test.bin
> > busybox.bin: ELF 32-bit LSB executable, MIPS, MIPS-I version 1 (SYSV), dynamically linked (uses shared libs), stripped
> > test.bin: ELF 32-bit LSB executable, MIPS, version 1 (SYSV), statically linked, stripped
> >
> > busybox.bin is the builtin busybox while test.bin is a static HelloWorld
> >
> > I ran readelf on it:
> >
> > $ readelf -h busybox.bin
> > 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: EXEC (Executable file)
> > Machine: MIPS R3000
> > Version: 0x1
> > Entry point address: 0x4037e0
> > Start of program headers: 52 (bytes into file)
> > Start of section headers: 337304 (bytes into file)
> > Flags: 0x5, noreorder, cpic, mips1
> > Size of this header: 52 (bytes)
> > Size of program headers: 32 (bytes)
> > Number of program headers: 6
> > Size of section headers: 40 (bytes)
> > Number of section headers: 21
> > Section header string table index: 20
> > $ readelf -h test.bin
> > 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: EXEC (Executable file)
> > Machine: MIPS R3000
> > Version: 0x1
> > Entry point address: 0x400140
> > Start of program headers: 52 (bytes into file)
> > Start of section headers: 11780 (bytes into file)
> > Flags: 0x50001007, noreorder, pic, cpic, o32, mips32
> > Size of this header: 52 (bytes)
> > Size of program headers: 32 (bytes)
> > Number of program headers: 3
> > Size of section headers: 40 (bytes)
> > Number of section headers: 17
> > Section header string table index: 16
> > $ diff -u <(readelf -h busybox.bin) <(readelf -h test.bin)
> > --- /dev/fd/63 2008-02-13 00:26:48.880261477 +0100
> > +++ /dev/fd/62 2008-02-13 00:26:48.880261477 +0100
> > @@ -8,13 +8,13 @@
> > Type: EXEC (Executable file)
> > Machine: MIPS R3000
> > Version: 0x1
> > - Entry point address: 0x4037e0
> > + Entry point address: 0x400140
> > Start of program headers: 52 (bytes into file)
> > - Start of section headers: 337304 (bytes into file)
> > - Flags: 0x5, noreorder, cpic, mips1
> > + Start of section headers: 11780 (bytes into file)
> > + Flags: 0x50001007, noreorder, pic, cpic, o32, mips32
> > Size of this header: 52 (bytes)
> > Size of program headers: 32 (bytes)
> > - Number of program headers: 6
> > + Number of program headers: 3
> > Size of section headers: 40 (bytes)
> > - Number of section headers: 21
> > - Section header string table index: 20
> > + Number of section headers: 17
> > + Section header string table index: 16
> >
> > The router firmware uses:
> > # cat /proc/version
> > Linux version 2.4.17_mvl21-malta-mips_fp_le (root@xxxxxxxxxxxxxxxxxxxxx) (gcc version 2.95.3 20010315 (release/MontaVista)) #1 Fri Mar 18 11:00:12 EST 2005
> >
> > While I have a gcc-4.2.3 toolchain with 2.6.24 headers.
> >
> >
> > How can I build a mips1 binary instead of the mips32 I make? Can I disable o32?
> >
> > Best Regards,
> > Matteo Croce
> >
> >
>
Already tried, won't work.
I attach the binaries
Attachment:
test.bin
Description: application/executable
Attachment:
busybox.bin
Description: application/executable
