libc/sysdeps/linux/e1/longjmp.c

   1 /*  This file is lisenced under LGPL
   2  *  Copyright (C) 2002-2003,    George Thanos <george.thanos@gdt.gr>
   3  *                              Yannis Mitsos <yannis.mitsos@gdt.gr>
   4  */
   5
   6 #include <syscall.h>
   7 #include <setjmp.h>
   8 #include <stdio.h>
   9 #include <signal.h>
  10
  11 #define __NR_e1newSP  224
  12 static inline _syscall1(int, e1newSP, unsigned long, SavedSP )
  13
  14 unsigned long jmpbuf_ptr;
  15
  16 void longjmp(jmp_buf state, int value )
  17 {
  18         if(!value)
  19                 state->__jmpbuf->ReturnValue = 1;
  20         else
  21                 state->__jmpbuf->ReturnValue = value;
  22
  23         jmpbuf_ptr = (unsigned long)state;
  24         e1newSP(state->__jmpbuf->SavedSP);
  25
  26 #define _state_ ((struct __jmp_buf_tag*)jmpbuf_ptr)
  27         asm volatile("mov L0, %0\n\t"
  28                      "mov L1, %1\n\t"
  29                      "mov L2, %2\n\t"
  30                      "mov G3, %3\n\t"
  31                      "mov G4, %4\n\t"
  32                      "ret PC, L1\n\t"
  33                      :/*no output*/
  34                      :"l"(_state_->__jmpbuf->ReturnValue),
  35                       "l"(_state_->__jmpbuf->SavedPC),
  36                       "l"(_state_->__jmpbuf->SavedSR),
  37                       "l"(_state_->__jmpbuf->G3),
  38                       "l"(_state_->__jmpbuf->G4)
  39                      :"%G3", "%G4", "%L0", "%L1" );
  40 #undef _state_
  41 }
  42
  43 libc_hidden_proto(sigprocmask)
  44
  45 void siglongjmp(sigjmp_buf state, int value )
  46 {
  47         if( state->__mask_was_saved )
  48                 sigprocmask(SIG_SETMASK, &state->__saved_mask, NULL);
  49
  50         if(!value)
  51                 state->__jmpbuf->ReturnValue = 1;
  52         else
  53                 state->__jmpbuf->ReturnValue = value;
  54
  55         jmpbuf_ptr = (unsigned long)state;
  56         e1newSP(state->__jmpbuf->SavedSP);
  57
  58
  59 #define _state_ ((struct __jmp_buf_tag*)jmpbuf_ptr)
  60         asm volatile("mov L0, %0\n\t"
  61                      "mov L1, %1\n\t"
  62                      "mov L2, %2\n\t"
  63                      "mov G3, %3\n\t"
  64                      "mov G4, %4\n\t"
  65                      "ret PC, L1\n\t"
  66                      :/*no output*/
  67                      :"l"(_state_->__jmpbuf->ReturnValue),
  68                       "l"(_state_->__jmpbuf->SavedPC),
  69                       "l"(_state_->__jmpbuf->SavedSR),
  70                       "l"(_state_->__jmpbuf->G3),
  71                       "l"(_state_->__jmpbuf->G4)
  72                      :"%G3", "%G4", "%L0", "%L1" );
  73 #undef _state_
  74 }