l4/pkg/l4re-core/uclibc/lib/contrib/uclibc/libc/sysdeps/linux/bfin/bsdsetjmp.c

   1 /* setjmp for the Blackfin project
   2  *
   3  * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
   4  * Copyright (C) 2003 Metrowerks
   5  * Based on code from Analog Devices.
   6  *
   7  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
   8  */
   9
  10 #include <setjmp.h>
  11
  12 #undef setjmp
  13
  14 int setjmp(jmp_buf env)
  15 {
  16         __asm__ __volatile__(
  17                 "[--SP] = p0;\n\t"
  18                 "p0 = r0;\n\t"
  19                 "r0 = [SP++];\n\t"
  20
  21                 "[p0++] = r0;\n\t"       /* GP address registers */
  22                 "[p0++] = p1;\n\t"
  23                 "[p0++] = p2;\n\t"
  24                 "[p0++] = p3;\n\t"
  25                 "[p0++] = p4;\n\t"
  26                 "[p0++] = p5;\n\t"
  27
  28                 "[p0++] = FP;\n\t"       /* frame pointer */
  29                 "[p0++] = SP;\n\t"       /* stack pointer */
  30
  31                 "[p0++] = p0;\n\t"       /* data regs */
  32                 "[p0++] = r1;\n\t"
  33                 "[p0++] = r2;\n\t"
  34                 "[p0++] = r3;\n\t"
  35                 "[p0++] = r4;\n\t"
  36                 "[p0++] = r5;\n\t"
  37                 "[p0++] = r6;\n\t"
  38                 "[p0++] = r7;\n\t"
  39
  40                 "r0 = ASTAT;\n\t"
  41                 "[p0++] = r0;\n\t"
  42
  43                 "r0 = LC0;\n\t"          /* loop counters */
  44                 "[p0++] = r0;\n\t"
  45                 "r0 = LC1;\n\t"
  46                 "[p0++] = r0;\n\t"
  47
  48                 "r0 = A0.w;\n\t"
  49                 "[p0++] = r0;\n\t"
  50                 "r0.l = A0.x;\n\t"
  51                 "[p0++] = r0;\n\t"
  52                 "r0 = A1.w;\n\t"
  53                 "[p0++] = r0;\n\t"
  54                 "r0.l = A1.x;\n\t"
  55                 "[p0++] = r0;\n\t"
  56
  57                                  /* Dag regs */
  58                 "r0 = i0;\n\t"           /* index registers */
  59                 "[p0++] = r0;\n\t"
  60                 "r0 = i1;\n\t"
  61                 "[p0++] = r0;\n\t"
  62                 "r0 = i2;\n\t"
  63                 "[p0++] = r0;\n\t"
  64                 "r0 = i3;\n\t"
  65                 "[p0++] = r0;\n\t"
  66
  67                 "r0 = m0;\n\t"           /* modifier registers */
  68                 "[p0++] = r0;\n\t"
  69                 "r0 = m1;\n\t"
  70                 "[p0++] = r0;\n\t"
  71                 "r0 = m2;\n\t"
  72                 "[p0++] = r0;\n\t"
  73                 "r0 = m3;\n\t"
  74                 "[p0++] = r0;\n\t"
  75
  76                 "r0 = l0;\n\t"           /* length registers */
  77                 "[p0++] = r0;\n\t"
  78                 "r0 = l1;\n\t"
  79                 "[p0++] = r0;\n\t"
  80                 "r0 = l2;\n\t"
  81                 "[p0++] = r0;\n\t"
  82                 "r0 = l3;\n\t"
  83                 "[p0++] = r0;\n\t"
  84
  85                 "r0 = b0;\n\t"           /* base registers */
  86                 "[p0++] = r0;\n\t"
  87                 "r0 = b1;\n\t"
  88                 "[p0++] = r0;\n\t"
  89                 "r0 = b2;\n\t"
  90                 "[p0++] = r0;\n\t"
  91                 "r0 = b3;\n\t"
  92                 "[p0++] = r0;\n\t"
  93
  94                 "r0 = RETS;\n\t"         /* store return address */
  95                 "[p0++] = r0;\n\t"
  96
  97                 "r0 = 0;\n\t"
  98                 :
  99                 :
 100         );
 101
 102         return 0;
 103 }