On Thu, 2008-10-23 at 02:08 +0900, Atsushi Nemoto wrote:
Hello Atsushi,
> diff -u uClibc-0.9.30-rc2/libc/sysdeps/linux/mips/syscall.S
> uClibc/libc/sysdeps/linux/mips/syscall.S
> --- uClibc-0.9.30-rc2/libc/sysdeps/linux/mips/syscall.S 2007-09-15
> 16:25:54.000000000 +0900
> +++ uClibc/libc/sysdeps/linux/mips/syscall.S 2008-10-23 01:53:28.000000000
> +0900
> @@ -32,7 +32,6 @@
> #ifdef __PIC__
> SETUP_GP
> #endif
> - .set noreorder
> move v0, a0 /* Load system call number from first arg. */
> move a0, a1 /* Move the next three args up a register. */
> move a1, a2
> @@ -59,12 +58,12 @@
> lw v0,7*4(sp) /* for system call restarts */
> #endif
> syscall /* Do the system call. */
> - bnez a3, 1f
> #ifdef __mips64
> daddiu sp,sp,16
> #else
> addiu sp,sp,32
> #endif
> + bnez a3, 1f
> j ra /* Return to caller. */
> 1:
> move a0,v0 /* Pass return val to C function. */
Thanks, it works for me (mips1), generated code:
00000000 <syscall>:
0: 3c1c0000 lui gp,0x0
0: R_MIPS_HI16 _gp_disp
4: 279c0000 addiu gp,gp,0
4: R_MIPS_LO16 _gp_disp
8: 0399e021 addu gp,gp,t9
c: 00801021 move v0,a0
10: 00a02021 move a0,a1
14: 00c02821 move a1,a2
18: 00e03021 move a2,a3
1c: 8fa70010 lw a3,16(sp)
20: 8fa80014 lw t0,20(sp)
24: 8fa90018 lw t1,24(sp)
28: 8faa001c lw t2,28(sp)
2c: 27bdffe0 addiu sp,sp,-32
30: afa80010 sw t0,16(sp)
34: afa90014 sw t1,20(sp)
38: afaa0018 sw t2,24(sp)
3c: afa2001c sw v0,28(sp)
40: 8fa2001c lw v0,28(sp)
44: 0000000c syscall
48: 14e00003 bnez a3,58 <syscall+0x58>
4c: 27bd0020 addiu sp,sp,32
50: 03e00008 jr ra
54: 00000000 nop
58: 00402021 move a0,v0
5c: 8f990000 lw t9,0(gp)
5c: R_MIPS_CALL16 __syscall_error
60: 00000000 nop
64: 03200008 jr t9
68: 00000000 nop
6c: 00000000 nop
--
Maxime
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