Radare2: Linux/MIPS x32 architecture support proposal

Created on 22 May 2016 · 11Comments · Source: radareorg/radare2

Background

Supporting GNU Linux for MIPS (as well as ARM and PowerPC) is good to help reverse engineering for routers & etc IoT non Android. From the malicious injected program to check the firmware. Below ate the list of routers using GNU Linux base OS in the market today:
https://openwrt.org/
https://en.wikipedia.org/wiki/DD-WRT
https://en.wikipedia.org/wiki/Ubiquiti_Networks
https://en.wikipedia.org/wiki/Linksys
https://en.wikipedia.org/wiki/Melco

The test environment

I am picking the most popular platform used for debugging malware
with CPU & architecture: MIPS x32

CPU revision is         : 00019300 (MIPS 24Kc)
FPU revision is         : 00739300
  :
system type             : MIPS Malta
cpu model               : MIPS 24Kc V0.0  FPU V0.0
BogoMIPS                : 1136.64
tlb_entries             : 16
extra interrupt vector  : yes
hardware watchpoint     : yes, count: 1, address/irw mask: [0x0ff8]
ASEs implemented        : mips16

FPU libraries location

$ pwd
/usr/include/mips-linux-gnu
$ ls -alF
total 72
drwxr-xr-x  6 root root  4096 Feb 23 05:46 ./
drwxr-xr-x 31 root root 16384 Feb 23 05:46 ../
-rw-r--r--  1 root root  4351 Feb 12 05:39 a.out.h
drwxr-xr-x  2 root root  4096 Apr  4 08:21 asm/
drwxr-xr-x  2 root root 12288 Feb 23 05:46 bits/
-rw-r--r--  1 root root  3994 Feb 12 05:37 fpu_control.h
drwxr-xr-x  2 root root  4096 Feb 23 05:46 gnu/
-rw-r--r--  1 root root  8150 Feb 12 05:37 ieee754.h
drwxr-xr-x  2 root root 12288 Feb 23 05:46 sys/

GNU Linux/MIPS FPU information (incl FP register bits)

$ cat fpu_control.h
/* FPU control word bits.  Mips version.
   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2006, 2008
   Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Olaf Flebbe and Ralf Baechle.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#ifndef _FPU_CONTROL_H
#define _FPU_CONTROL_H

/* MIPS FPU floating point control register bits.
 *
 * 31-25  -> floating point conditions code bits 7-1.  These bits are only
 *           available in MIPS IV.
 * 24     -> flush denormalized results to zero instead of
 *           causing unimplemented operation exception.  This bit is only
 *           available for MIPS III and newer.
 * 23     -> Condition bit
 * 22-18  -> reserved (read as 0, write with 0)
 * 17     -> cause bit for unimplemented operation
 * 16     -> cause bit for invalid exception
 * 15     -> cause bit for division by zero exception
 * 14     -> cause bit for overflow exception
 * 13     -> cause bit for underflow exception
 * 12     -> cause bit for inexact exception
 * 11     -> enable exception for invalid exception
 * 10     -> enable exception for division by zero exception
 *  9     -> enable exception for overflow exception
 *  8     -> enable exception for underflow exception
 *  7     -> enable exception for inexact exception
 *  6     -> flag invalid exception
 *  5     -> flag division by zero exception
 *  4     -> flag overflow exception
 *  3     -> flag underflow exception
 *  2     -> flag inexact exception
 *  1-0   -> rounding control
 *
 *
 * Rounding Control:
 * 00 - rounding to nearest (RN)
 * 01 - rounding toward zero (RZ)
 * 10 - rounding (up) toward plus infinity (RP)
 * 11 - rounding (down)toward minus infinity (RM)
 */

#include <features.h>

#ifdef __mips_soft_float

#define _FPU_RESERVED 0xffffffff
#define _FPU_DEFAULT  0x00000000
typedef unsigned int fpu_control_t;
#define _FPU_GETCW(cw) 0
#define _FPU_SETCW(cw) do { } while (0)
extern fpu_control_t __fpu_control;

#else /* __mips_soft_float */

/* masking of interrupts */
#define _FPU_MASK_V     0x0800  /* Invalid operation */
#define _FPU_MASK_Z     0x0400  /* Division by zero  */
#define _FPU_MASK_O     0x0200  /* Overflow          */
#define _FPU_MASK_U     0x0100  /* Underflow         */
#define _FPU_MASK_I     0x0080  /* Inexact operation */

/* flush denormalized numbers to zero */
#define _FPU_FLUSH_TZ   0x1000000

/* rounding control */
#define _FPU_RC_NEAREST 0x0     /* RECOMMENDED */
#define _FPU_RC_ZERO    0x1
#define _FPU_RC_UP      0x2
#define _FPU_RC_DOWN    0x3

#define _FPU_RESERVED 0xfe3c0000  /* Reserved bits in cw */


/* The fdlibm code requires strict IEEE double precision arithmetic,
   and no interrupts for exceptions, rounding to nearest.  */

#define _FPU_DEFAULT  0x00000000

/* IEEE:  same as above, but exceptions */
#define _FPU_IEEE     0x00000F80

/* Type of the control word.  */
typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__SI__)));

/* Macros for accessing the hardware control word.  */
#define _FPU_GETCW(cw) __asm__ volatile ("cfc1 %0,$31" : "=r" (cw))
#define _FPU_SETCW(cw) __asm__ volatile ("ctc1 %0,$31" : : "r" (cw))

/* Default control word set at startup.  */
extern fpu_control_t __fpu_control;

#endif /* __mips_soft_float */

#endif  /* fpu_control.h */

Current build test status

Test build using below r2 git version:

heads/master-0-g53f9783

Errors during build:

## linux_debug compilation errors:

p/native/linux/linux_debug.c: In function 'linux_reg_write':
p/native/linux/linux_debug.c:437:43: error: 'struct user' has no member named 'u_debugreg'
p/native/linux/linux_coredump.c: In function 'linux_get_prstatus':
p/native/linux/linux_coredump.c:163:34: error: invalid application of 'sizeof' to incomplete type 'struct user_regs_struct'
p/native/linux/linux_coredump.c: In function 'linux_get_fp_regset':
p/native/linux/linux_coredump.c:199:25: error: invalid application of 'sizeof' to incomplete type 'struct user_fpregs_struct'

## linux_coredump compilation errors:

p/native/linux/linux_coredump.c: In function 'get_nt_data':
p/native/linux/linux_coredump.c:690:2: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'size_t' [-Wformat]
p/native/linux/linux_coredump.c: In function 'dump_elf_pheaders':
p/native/linux/linux_coredump.c:879:2: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'size_t' [-Wformat]
p/native/linux/linux_coredump.c: In function 'dump_elf_map_content':
p/native/linux/linux_coredump.c:966:4: warning: format '%ld' expects argument of type 'long int', but argument 6 has type 'size_t' [-Wformat]
p/native/linux/linux_coredump.c:970:22: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
p/native/linux/linux_coredump.c:973:4: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'size_t' [-Wformat]
p/native/linux/linux_coredump.c: At top level:
p/native/linux/linux_coredump.c:935:13: warning: 'show_maps' defined but not used [-Wunused-function]
make[4]: *** [p/native/linux/linux_coredump.o] Error 1

## GNU Linux predefined MIPS arch MACRO

Working predefined used compiler MACRO:

__mips
__mips__

Has tests:

$ cat test.c
#include <sys/syscall.h>
#if __MIPS__
main ()
 {
   syscall (SYS_write,1,"\nHello\n\r\n",9);
  }
#endif
$ gcc -o test3 test.c
/usr/lib/gcc/mips-linux-gnu/4.6/../../../mips-linux-gnu/crt1.o: In function `__start':
(.text+0x18): undefined reference to `main'
collect2: ld returned 1 exit status
$
$ cat test.c
#include <sys/syscall.h>
#if __mips
main ()
 {
   syscall (SYS_write,1,"\nHello\n\r\n",9);
  }
#endif
$ gcc -o test1 test.c
$ ./test1

Hello

$ 

$ cat test.c
#include <sys/syscall.h>
#if __mips__
main ()
 {
   syscall (SYS_write,1,"\nHello\n\r\n",9);
  }
#endif
$ gcc -o test2 test.c
$ ./test2

Hello

$

References:

https://github.com/radare/radare2/issues/4720 https://github.com/radare/radare2/issues/4720#issuecomment-220792106
https://github.com/radare/radare2/pull/4870#issuecomment-219352856 https://github.com/radare/radare2/pull/4870#issuecomment-220518350
https://sourceforge.net/p/predef/wiki/Architectures/
http://stackoverflow.com/a/18117016/5967376

$ date
Sun May 22 11:51:35 UTC 2016
$ #@unixfreaxjp

RDebug

Source

unixfreaxjp

All 11 comments

looks like the same issue as the ppc one

radare on 23 May 2016

👍1

Try again. It builds fine in android-mips

On 22 May 2016, at 13:52, unixfreaxjp [email protected] wrote:

CPU & architecture: MIPS x32

CPU revision is : 00019300 (MIPS 24Kc)
FPU revision is : 00739300
:
system type : MIPS Malta
cpu model : MIPS 24Kc V0.0 FPU V0.0
BogoMIPS : 1136.64
tlb_entries : 16
extra interrupt vector : yes
hardware watchpoint : yes, count: 1, address/irw mask: [0x0ff8]
ASEs implemented : mips16
FPU libraries location

$ pwd
/usr/include/mips-linux-gnu
$ ls -alF
total 72
drwxr-xr-x 6 root root 4096 Feb 23 05:46 ./
drwxr-xr-x 31 root root 16384 Feb 23 05:46 ../
-rw-r--r-- 1 root root 4351 Feb 12 05:39 a.out.h
drwxr-xr-x 2 root root 4096 Apr 4 08:21 asm/
drwxr-xr-x 2 root root 12288 Feb 23 05:46 bits/
-rw-r--r-- 1 root root 3994 Feb 12 05:37 fpu_control.h
drwxr-xr-x 2 root root 4096 Feb 23 05:46 gnu/
-rw-r--r-- 1 root root 8150 Feb 12 05:37 ieee754.h
drwxr-xr-x 2 root root 12288 Feb 23 05:46 sys/
FPU information:

$ cat fpu_control.h
/* FPU control word bits. Mips version.
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2006, 2008
Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Olaf Flebbe and Ralf Baechle.

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */

ifndef _FPU_CONTROL_H

define _FPU_CONTROL_H

/* MIPS FPU floating point control register bits.
*

31-25 -> floating point conditions code bits 7-1. These bits are only

available in MIPS IV.

24 -> flush denormalized results to zero instead of

causing unimplemented operation exception. This bit is only

available for MIPS III and newer.

23 -> Condition bit

22-18 -> reserved (read as 0, write with 0)

17 -> cause bit for unimplemented operation

16 -> cause bit for invalid exception

15 -> cause bit for division by zero exception

14 -> cause bit for overflow exception

13 -> cause bit for underflow exception

12 -> cause bit for inexact exception

11 -> enable exception for invalid exception

10 -> enable exception for division by zero exception

9 -> enable exception for overflow exception

8 -> enable exception for underflow exception

7 -> enable exception for inexact exception

6 -> flag invalid exception

5 -> flag division by zero exception

4 -> flag overflow exception

3 -> flag underflow exception

2 -> flag inexact exception

1-0 -> rounding control
*
*

Rounding Control:

00 - rounding to nearest (RN)

01 - rounding toward zero (RZ)

10 - rounding (up) toward plus infinity (RP)

11 - rounding (down)toward minus infinity (RM)
*/

include

ifdef __mips_soft_float

define _FPU_RESERVED 0xffffffff

define _FPU_DEFAULT 0x00000000

typedef unsigned int fpu_control_t;

define _FPU_GETCW(cw) 0

define _FPU_SETCW(cw) do { } while (0)

extern fpu_control_t __fpu_control;

else /* __mips_soft_float */

/* masking of interrupts _/

define _FPU_MASK_V 0x0800 /_ Invalid operation _/

define _FPU_MASK_Z 0x0400 /_ Division by zero _/

define _FPU_MASK_O 0x0200 /_ Overflow _/

define _FPU_MASK_U 0x0100 /_ Underflow _/

define _FPU_MASK_I 0x0080 /_ Inexact operation */

/* flush denormalized numbers to zero */

define _FPU_FLUSH_TZ 0x1000000

/* rounding control _/

define _FPU_RC_NEAREST 0x0 /_ RECOMMENDED */

define _FPU_RC_ZERO 0x1

define _FPU_RC_UP 0x2

define _FPU_RC_DOWN 0x3

define _FPU_RESERVED 0xfe3c0000 /* Reserved bits in cw */

/* The fdlibm code requires strict IEEE double precision arithmetic,
and no interrupts for exceptions, rounding to nearest. */

define _FPU_DEFAULT 0x00000000

/* IEEE: same as above, but exceptions */

define _FPU_IEEE 0x00000F80

/* Type of the control word. */
typedef unsigned int fpu_control_t attribute ((mode (SI)));

/* Macros for accessing the hardware control word. */

define _FPU_GETCW(cw) __asm__ volatile ("cfc1 %0,$31" : "=r" (cw))

define _FPU_SETCW(cw) __asm__ volatile ("ctc1 %0,$31" : : "r" (cw))

/* Default control word set at startup. */
extern fpu_control_t __fpu_control;

endif /* __mips_soft_float */

endif /* fpu_control.h */

Test build using below r2 git version:

heads/master-0-g53f9783
Errors during build:

linux_debug compilation errors:

p/native/linux/linux_debug.c: In function 'linux_reg_write':
p/native/linux/linux_debug.c:437:43: error: 'struct user' has no member named 'u_debugreg'
p/native/linux/linux_coredump.c: In function 'linux_get_prstatus':
p/native/linux/linux_coredump.c:163:34: error: invalid application of 'sizeof' to incomplete type 'struct user_regs_struct'
p/native/linux/linux_coredump.c: In function 'linux_get_fp_regset':
p/native/linux/linux_coredump.c:199:25: error: invalid application of 'sizeof' to incomplete type 'struct user_fpregs_struct'

linux_coredump compilation errors:

p/native/linux/linux_coredump.c: In function 'get_nt_data':
p/native/linux/linux_coredump.c:690:2: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'size_t' [-Wformat]
p/native/linux/linux_coredump.c: In function 'dump_elf_pheaders':
p/native/linux/linux_coredump.c:879:2: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'size_t' [-Wformat]
p/native/linux/linux_coredump.c: In function 'dump_elf_map_content':
p/native/linux/linux_coredump.c:966:4: warning: format '%ld' expects argument of type 'long int', but argument 6 has type 'size_t' [-Wformat]
p/native/linux/linux_coredump.c:970:22: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
p/native/linux/linux_coredump.c:973:4: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'size_t' [-Wformat]
p/native/linux/linux_coredump.c: At top level:
p/native/linux/linux_coredump.c:935:13: warning: 'show_maps' defined but not used [-Wunused-function]
make[4]: *** [p/native/linux/linux_coredump.o] Error 1
Tested predefined used compiler MACRO:

mips
__mips
Has tests:

$ cat test.c

include

if __mips

main ()
{
syscall (SYS_write,1,"\nHello\n\r\n",9);
}

endif

$ gcc -o test1 test.c
$ ./test1

Hello

$

$ cat test.c

include

if mips

main ()
{
syscall (SYS_write,1,"\nHello\n\r\n",9);
}

endif

$ gcc -o test2 test.c
$ ./test2

Hello

$
$ date
Sun May 22 11:51:35 UTC 2016
$ #@unixfreaxjp

—
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub

radare on 23 May 2016

👍1

Second try build report

@radare @XVilka @Maijin
Failed still, now pulling https://github.com/radare/radare2/commit/45c36da9c3930d3660b4f5211dc434ced09989eb (I know it's unrelated, just want to pull all last build for thorough feature checking on this arch & OS)

Build-report (2)

      :
CC linux_debug.c
CC linux_coredump.c
p/native/linux/linux_debug.c: In function 'linux_handle_signals':
p/native/linux/linux_debug.c:47:2: warning: #warning DO MORE RDEBUGREASON HERE [-Wcpp]
p/native/linux/linux_debug.c: In function 'print_fpu':
p/native/linux/linux_debug.c:295:2: warning: #warning not implemented for this platform [-Wcpp]
p/native/linux/linux_debug.c: In function 'linux_reg_read':
p/native/linux/linux_debug.c:385:3: warning: #warning not implemented for this platform [-Wcpp]
p/native/linux/linux_debug.c:300:7: warning: variable 'showfpu' set but not used [-Wunused-but-set-variable]
p/native/linux/linux_debug.c: In function 'linux_reg_write':
p/native/linux/linux_debug.c:437:43: error: 'struct user' has no member named 'u_debugreg'
p/native/linux/linux_debug.c: At top level:
p/native/linux/linux_debug.c:207:13: warning: 'print_fpu' defined but not used [-Wunused-function]
make[4]: *** [p/native/linux/linux_debug.o] Error 1
make[4]: *** Waiting for unfinished jobs....

p/native/linux/linux_coredump.c: In function 'debug_print_prpsinfo':
p/native/linux/linux_coredump.c:67:2: warning: format '%d' expects argument of type 'int', but argument 3 has type 'long int' [-Wformat]
p/native/linux/linux_coredump.c:68:2: warning: format '%d' expects argument of type 'int', but argument 3 has type 'long int' [-Wformat]
p/native/linux/linux_coredump.c: In function 'linux_get_prstatus':
p/native/linux/linux_coredump.c:155:34: error: invalid application of 'sizeof' to incomplete type 'struct user_regs_struct'
p/native/linux/linux_coredump.c: In function 'linux_get_fp_regset':
p/native/linux/linux_coredump.c:191:25: error: invalid application of 'sizeof' to incomplete type 'struct user_fpregs_struct'
p/native/linux/linux_coredump.c: In function 'get_nt_data':
p/native/linux/linux_coredump.c:708:2: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'size_t' [-Wformat]
p/native/linux/linux_coredump.c: In function 'dump_elf_pheaders':
p/native/linux/linux_coredump.c:895:2: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'size_t' [-Wformat]
p/native/linux/linux_coredump.c: At top level:
p/native/linux/linux_coredump.c:950:13: warning: 'show_maps' defined but not used [-Wunused-function]
make[4]: *** [p/native/linux/linux_coredump.o] Error 1
make[3]: *** [foo] Error 2
make[2]: *** [debug] Error 2
make[2]: *** Waiting for unfinished jobs....
      :

It builds fine in android-mips

The predef compiler MACRO for MIPS processor on androidand linuxcould be different? And it seems android MIPS != GNU Linux MIPS. OpenWRT is on GNU Linux, on some known routers, and Ubuntu MIPS desktop also exists.

Some idea:

In linux_debug.c this macro "may" didn't hit. Noted __MIPS__ ; the __mips seems work.
In linux_debug.c at here, we may need specific PRINT_FPU (fpregs) for MIPS, this just as the same as powerpccase in here.
Looks need some adjustment to a new feature _coredump.c_ .
So far we have MIPS arch only to support android OS, haven't we? Not GNU Linux. < point
Yes, you saw the issue correctly too :+1: I leave it to you for the roadmap since this is involving r2 features planning.

unixfreaxjp on 25 May 2016

https://people.debian.org/%7Eaurel32/qemu/mips/ && https://people.debian.org/%7Eaurel32/qemu/mipsel/

radare on 14 Jun 2016

is this mipsbe or mipsel?

crowell on 30 Jun 2016

It doesnt matters. Both are supported and building fine here. Just waiitng for confirmation. About big endianness, there are some issues still to fix in here. But those are generic to armbe, ppcbe and mipsbe

On 30 Jun 2016, at 07:14, Jeffrey Crowell [email protected] wrote:

is this mipsbe or mipsel?

—
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub, or mute the thread.

radare on 30 Jun 2016

on testing mode now.. but during check last code heads/master-0-g2f5ead1 before start tests this error came up, it seems like the latest modification is killing freebsd, and mostly all bsd will be affected in that same broken links https://github.com/radare/radare2/issues/5279
Please help to check and kindly let me know if you want to keep on testing arm/mips/ppc anyway

is this mipsbe or mipsel?

mipsel

unixfreaxjp on 4 Jul 2016

I tested anyway. Build test are OKAY now...

mips:~/radare2$ r2 -v
radare2 0.10.4-git 11827 @ linux-mips-32 git.0.10.3-403-g2f5ead1
commit: 2f5ead1efd481af5864acad26fc7307d2555e8f3 build: 2016-07-04

...but!!! the running test has problems, same problem also occurred in the PPC platform too.

It doesn't autodetect the architecture (e asm.arch) correctly while run in architecture MIPS+ opening MIPS ELFbut on x86 instead, workaround is command line e asm.arch=mips, works.
I assumed the endian problem looks still in there, pd& pxresult still shows invalid data.
The internal command that's not involving object are running well.
Due to 2.'s problem I can not test it further for breakpoints or stepping.
The testpad data is here: https://github.com/unixfreaxjp/dev/blob/master/r2mips-1.md

unixfreaxjp on 4 Jul 2016

is this mips thing big endian? can you share bins?

radare on 4 Jul 2016

is this mips thing big endian? can you share bins?

It's BigEndian of course :) proof:

  Magic:   7f 45 4c 46 01 02 01 00 00 00 00 00 00 00 00 00
  Class:                             ELF32
  Data:                              2's complement, big endian
  Version:                           1 (current)
  OS/ABI:                            UNIX - System V
  ABI Version:                       0
  Type:                              EXEC (Executable file)
  Machine:                           MIPS R3000

and

  Magic:   7f 45 4c 46 01 02 01 00 00 00 00 00 00 00 00 00
  Class:                             ELF32
  Data:                              2's complement, big endian
  Version:                           1 (current)
  OS/ABI:                            UNIX - System V
  ABI Version:                       0
  Type:                              EXEC (Executable file)
  Machine:                           PowerPC

Well, I guess just in case you want to check the ls and nc bins for MIPS and PPC , below is the link to download them, nc and ls in each architecture (4 files in a zip file).
http://www.mediafire.com/download/c1owfff2c6oeulh/BigEndian.zip
Let me know if you need further tests. I am freezing the vm now.

@unixfreaxjp

unixfreaxjp on 4 Jul 2016

Due to: https://github.com/radare/radare2/issues/4969#issuecomment-230260879 < compilation is fixed
Ref to: https://github.com/radare/radare2/issues/4720#issuecomment-230424723 < separate BigEndian issue
This case is closed. Will refer to new issue (for BigEndian parsing, see below link).

unixfreaxjp on 7 Jul 2016

Was this page helpful?

0 / 5 - 0 ratings

Related issues

Windows kernel dumps loading support

XVilka · 3Comments

radare2 is unusably slow for large binaries

crowell · 8Comments

'S - IO section manipulation information' not appears

RazviAlex · 4Comments

Decouple debugging profiles from the code

XVilka · 7Comments

We need a way to customize content of panels permanently

0ki · 6Comments

Radare2: Linux/MIPS x32 architecture support proposal

Background

The test environment

Current build test status

References:

All 11 comments

ifndef _FPU_CONTROL_H

define _FPU_CONTROL_H

include

ifdef __mips_soft_float

define _FPU_RESERVED 0xffffffff

define _FPU_DEFAULT 0x00000000

define _FPU_GETCW(cw) 0

define _FPU_SETCW(cw) do { } while (0)

else /* __mips_soft_float */

define _FPU_MASK_V 0x0800 /_ Invalid operation _/

define _FPU_MASK_Z 0x0400 /_ Division by zero _/

define _FPU_MASK_O 0x0200 /_ Overflow _/

define _FPU_MASK_U 0x0100 /_ Underflow _/

define _FPU_MASK_I 0x0080 /_ Inexact operation */

define _FPU_FLUSH_TZ 0x1000000

define _FPU_RC_NEAREST 0x0 /_ RECOMMENDED */

define _FPU_RC_ZERO 0x1

define _FPU_RC_UP 0x2

define _FPU_RC_DOWN 0x3

define _FPU_RESERVED 0xfe3c0000 /* Reserved bits in cw */

define _FPU_DEFAULT 0x00000000

define _FPU_IEEE 0x00000F80

define _FPU_GETCW(cw) __asm__ volatile ("cfc1 %0,$31" : "=r" (cw))

define _FPU_SETCW(cw) __asm__ volatile ("ctc1 %0,$31" : : "r" (cw))

endif /* __mips_soft_float */

endif /* fpu_control.h */

linux_debug compilation errors:

linux_coredump compilation errors:

include

if __mips

endif

include

if mips

endif

Second try build report

Some idea:

Related issues

define _FPU_GETCW(cw) asm volatile ("cfc1 %0,$31" : "=r" (cw))

define _FPU_SETCW(cw) asm volatile ("ctc1 %0,$31" : : "r" (cw))