new syscall stub support for ia64 libc

[Ulrich Drepper]

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David Mosberger wrote:

> Ah, perhaps ar.pfs didn't get preserved.  Earlier versions of GCC
> ignored clobbers to ar.pfs, but I don't remember exactly when it was
> fixed.

Looks like it.  This is the entire fxstat.os file:

0000000000000000 <__GI___fxstat>:
   0:   0c 80 2c 06 80 05       [MFI]       alloc r16=ar.pfs,11,3,0
   6:   00 00 00 02 00 c0                   nop.f 0x0
   c:   81 68 00 84                         adds r14=8,r13
  10:   02 20 01 44 00 21       [MII]       mov r36=r34
  16:   30 02 84 2c 00 00                   sxt4 r35=r33;;
  1c:   00 00 04 00                         nop.i 0x0
  20:   03 70 00 1c 18 10       [MII]       ld8 r14=[r14]
  26:   f0 e0 01 12 48 e0                   mov r15=1212;;
  2c:   e0 08 00 07                         mov b7=r14;;
  30:   1d 00 00 00 01 00       [MFB]       nop.m 0x0
  36:   00 00 00 02 00 c0                   nop.f 0x0
  3c:   78 00 80 10                         br.call.sptk.many b6=b7;;
  40:   0d 38 fc 15 06 3b       [MFI]       cmp.eq p7,p6=-1,r10
                        42: LTOFF_TPREL22       __libc_errno
  46:   00 00 00 02 00 c0                   nop.f 0x0
  4c:   01 08 00 90                         addl r14=0,r1;;
  50:   eb 70 00 1c 18 d0       [MMI] (p07) ld8 r14=[r14];;
  56:   e1 70 34 00 40 00             (p07) add r14=r14,r13
  5c:   00 00 04 00                         nop.i 0x0;;
  60:   f1 00 20 1c 90 d1       [MIB] (p07) st4 [r14]=r8
  66:   81 f8 f3 ff 4f 80             (p07) mov r8=-1
  6c:   08 00 84 00                         br.ret.sptk.many b0;;



The compiler used is gcc 3.2 based.

- -- 
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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