Re: Test failure on ARM

[Sam S. <sd...@gn...>]

> * Jerry James <ybt...@tz...> [2012-05-18 11:39:39 -0600]:
>
> I finally got around to figuring out how to create an ARM VM with
> qemu.  I've got the upcoming Fedora 17 release running on that VM.
> The problem is not in ffcall after all.  The illegal instruction error
> is occurring on the very last instruction of copy_loop_up_l2() in
> src/ariarm.d.  A disassembly with GDB shows:
>
> 0x00106b3c <+0>:     ldm     r0!, {r2, r4, r12, lr}
> 0x00106b40 <+4>:     stmia   r1!, {r2, r4, r12, lr}
> 0x00106b44 <+8>:     subs    r3, r3, #8
> 0x00106b48 <+12>:    ldmge   r0!, {r2, r4, r12, lr}
> 0x00106b4c <+16>:    stmiage r1!, {r2, r4, r12, lr}
> 0x00106b50 <+20>:    bgt     0x106b3c <copy_loop_up_l2>
> 0x00106b54 <+24>:    mov     r0, r1
> 0x00106b58 <+28>:    ldm     sp!, {r4, pc}^
>
> It's that last ldm instruction, at +28, that is the problem.  Also, I
> see this from compilation of src/ariarm.s:
> ariarm.s: Assembler messages:
> ariarm.s:1: Warning: ignoring attempt to redefine built-in register 'a1'
> ariarm.s:2: Warning: ignoring attempt to redefine built-in register 'a2'
> ariarm.s:3: Warning: ignoring attempt to redefine built-in register 'a3'
> ariarm.s:4: Warning: ignoring attempt to redefine built-in register 'a4'
> ariarm.s:5: Warning: ignoring attempt to redefine built-in register 'v1'
> ariarm.s:6: Warning: ignoring attempt to redefine built-in register 'v2'
> ariarm.s:7: Warning: ignoring attempt to redefine built-in register 'v3'
> ariarm.s:8: Warning: ignoring attempt to redefine built-in register 'v4'
> ariarm.s:9: Warning: ignoring attempt to redefine built-in register 'v5'
> ariarm.s:10: Warning: ignoring attempt to redefine built-in register 'v6'
> ariarm.s:12: Warning: ignoring attempt to redefine built-in register 'sl'
> ariarm.s:13: Warning: ignoring attempt to redefine built-in register 'fp'
> ariarm.s:14: Warning: ignoring attempt to redefine built-in register 'ip'
> ariarm.s:15: Warning: ignoring attempt to redefine built-in register 'sp'
> ariarm.s:16: Warning: ignoring attempt to redefine built-in register 'lr'
> ariarm.s:17: Warning: ignoring attempt to redefine built-in register 'pc'
> ariarm.s:152: Warning: s suffix on comparison instruction is deprecated
> ariarm.s:1027: Warning: s suffix on comparison instruction is deprecated
> ariarm.s:1032: Warning: s suffix on comparison instruction is deprecated
>
> I don't speak ARM assembly.  Is there anybody here who does and can
> give me a clue as to what to do?  This is with GCC 4.7 on an armv7hl
> platform.  Thanks,

I cannot help with the specific problem, but I will ask you to file a
CLISP bug report on SF.

You can disable all assembly by adding -DNO_ASM to CFLAGS (either at
configure time as "./configure CFLAGS=-DNO_ASM build-no-asm" or by editing
the Makefile and doing "make clean"). Please see clisp/unix/PLATFORMS
for more information.

-- 
Sam Steingold (http://sds.podval.org/) on Ubuntu 12.04 (precise) X 11.0.11103000
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