sysdeps/unix/sh/sysdep.S

   1 /* Copyright (C) 1999-2023 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <sysdep.h>
  19 #include <errno.h>
  20
  21 ENTRY(__syscall_error)
  22 #if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN
  23         /* We translate the system's EWOULDBLOCK error into EAGAIN.
  24            The GNU C library always defines EWOULDBLOCK==EAGAIN.
  25            EWOULDBLOCK_sys is the original number.  */
  26         mov.l   .L1, r1
  27         cmp/eq  r1, r0
  28         bf      skip
  29         nop
  30         mov.l   .L2, r0
  31 skip:
  32 #endif
  33         /* Store it in errno... */
  34 #ifndef SHARED
  35 #ifndef _LIBC_REENTRANT
  36         mov.l   .L3, r1
  37         mov.l   r0, @r1
  38 #else
  39         mov.l   .L3, r1
  40         sts.l   pr, @-r15
  41         cfi_adjust_cfa_offset (4)
  42         cfi_rel_offset (pr, 0)
  43         mov.l   r0, @-r15
  44         cfi_adjust_cfa_offset (4)
  45         jsr     @r1
  46          nop
  47         mov.l   @r15+, r1
  48         cfi_adjust_cfa_offset (-4)
  49         lds.l   @r15+, pr
  50         cfi_adjust_cfa_offset (-4)
  51         cfi_restore (pr)
  52         mov.l   r1, @r0
  53 #endif
  54 #else
  55         mov.l   r12, @-r15
  56         cfi_adjust_cfa_offset (4)
  57         cfi_rel_offset (r12, 0)
  58 #ifndef _LIBC_REENTRANT
  59         mov     r0, r2
  60         mov.l   0f, r12
  61         mova    0f, r0
  62         add     r0, r12
  63         mov.l   .L3, r0
  64         mov.l   @(r0,r12), r1
  65         mov.l   r2, @r1
  66 #else
  67         mov.l   r0, @-r15
  68         cfi_adjust_cfa_offset (4)
  69         sts.l   pr, @-r15
  70         cfi_adjust_cfa_offset (4)
  71         cfi_rel_offset (pr, 0)
  72         mov.l   0f, r12
  73         mova    0f, r0
  74         add     r0, r12
  75         mov.l   .L3, r1
  76         mova    .L3, r0
  77         add     r0, r1
  78         jsr     @r1
  79          nop
  80         lds.l   @r15+, pr
  81         cfi_adjust_cfa_offset (-4)
  82         cfi_restore (pr)
  83         mov.l   @r15+, r1
  84         cfi_adjust_cfa_offset (-4)
  85         mov.l   r1, @r0
  86 #endif
  87         mov.l   @r15+, r12
  88         cfi_adjust_cfa_offset (-4)
  89         cfi_restore (r12)
  90 #endif
  91         /* And just kick back a -1.  */
  92         rts
  93          mov    #-1, r0
  94
  95         .align  2
  96 #if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN
  97 .L1:    .long   EWOULDBLOCK_sys
  98 .L2:    .long   EAGAIN
  99 #endif
 100 #ifndef SHARED
 101 #ifndef _LIBC_REENTRANT
 102 .L3:    .long   C_SYMBOL_NAME(errno)
 103 #else
 104 .L3:    .long   C_SYMBOL_NAME(__errno_location)
 105 #endif
 106 #else
 107 0:
 108         .long   _GLOBAL_OFFSET_TABLE_
 109 #ifndef _LIBC_REENTRANT
 110 .L3:    .long   C_SYMBOL_NAME(errno@GOT)
 111 #else
 112 .L3:    .long   C_SYMBOL_NAME(__errno_location@PLT)
 113 #endif
 114 #endif
 115 END(__syscall_error)