1  /* longjmp for PA-RISC.
       2     Copyright (C) 1997-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library.  If not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <setjmp.h>
      20  #include <stdlib.h>
      21  
      22  /* Jump to the position specified by ENV, causing the
      23     setjmp call there to return VAL, or 1 if VAL is 0.  */
      24  void
      25  __longjmp (__jmp_buf env, int val)
      26  {
      27  #ifdef CHECK_SP
      28    CHECK_SP (env[0].__jmp_buf.__sp);
      29  #endif
      30  
      31    /* We must use one of the non-callee saves registers
      32       for env.  */
      33    register unsigned long r26 asm ("r26") = (unsigned long)&env[0];
      34    register unsigned long r25 asm ("r25") = (unsigned long)(val == 0 ? 1 : val);
      35  
      36    asm volatile(
      37  	/* Set return value.  */
      38  	"copy	%0, %%r28\n\t"
      39  	/* Load callee saves from r3 to r18.  */
      40  	"ldw	0(%1), %%r3\n\t"
      41  	"ldw	8(%1), %%r4\n\t"
      42  	"ldw	12(%1), %%r5\n\t"
      43  	"ldw	16(%1), %%r6\n\t"
      44  	"ldw	20(%1), %%r7\n\t"
      45  	"ldw	24(%1), %%r8\n\t"
      46  	"ldw	28(%1), %%r9\n\t"
      47  	"ldw	32(%1), %%r10\n\t"
      48  	"ldw	36(%1), %%r11\n\t"
      49  	"ldw	40(%1), %%r12\n\t"
      50  	"ldw	44(%1), %%r13\n\t"
      51  	"ldw	48(%1), %%r14\n\t"
      52  	"ldw	52(%1), %%r15\n\t"
      53  	"ldw	56(%1), %%r16\n\t"
      54  	"ldw	60(%1), %%r17\n\t"
      55  	"ldw	64(%1), %%r18\n\t"
      56  	/* Load PIC register.  */
      57  	"ldw	68(%1), %%r19\n\t"
      58  	/* Load static link register.  */
      59  	"ldw	72(%1), %%r27\n\t"
      60  	/* Load stack pointer.  */
      61  	"ldw	76(%1), %%r30\n\t"
      62  	/* Load return pointer. */
      63  	"ldw	80(%1), %%rp\n\t"
      64  	/* Use a spare caller saves register.  */
      65  	"ldo	88(%1),%%r25\n\t"
      66  	/* Load callee saves from fr12 to fr21.  */
      67  	"fldds,ma 8(%%r25), %%fr12\n\t"
      68  	"fldds,ma 8(%%r25), %%fr13\n\t"
      69  	"fldds,ma 8(%%r25), %%fr14\n\t"
      70  	"fldds,ma 8(%%r25), %%fr15\n\t"
      71  	"fldds,ma 8(%%r25), %%fr16\n\t"
      72  	"fldds,ma 8(%%r25), %%fr17\n\t"
      73  	"fldds,ma 8(%%r25), %%fr18\n\t"
      74  	"fldds,ma 8(%%r25), %%fr19\n\t"
      75  	"fldds,ma 8(%%r25), %%fr20\n\t"
      76  	"fldds	 0(%%r25), %%fr21\n\t"
      77  	/* Jump back to stored return address.  */
      78  	"bv,n	%%r0(%%r2)\n\t"
      79  	: /* No outputs.  */
      80  	: "r" (r25), "r" (r26)
      81  	: /* No point in clobbers.  */ );
      82  
      83    /* Avoid `volatile function does return' warnings.  */
      84    for (;;);
      85  }