1 /* Copyright (C) 1992-2013 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Brendan Kehoe (brendan@zen.org).
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.
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.
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 <http://www.gnu.org/licenses/>. */
24 #error This file uses GNU C extensions; you must compile with GCC.
28 __longjmp (env_arg, val_arg)
32 /* gcc 1.39.19 miscompiled the longjmp routine (as it did setjmp before
33 the hack around it); force it to use $a1 for the longjmp value.
34 Without this it saves $a1 in a register which gets clobbered
36 register struct __jmp_buf_internal_tag *env asm ("a0");
37 register int val asm ("a1");
39 register long long sp asm ("$29");
40 CHECK_SP (env[0].__sp, sp, long long);
43 #ifdef __mips_hard_float
44 /* Pull back the floating point callee-saved registers. */
45 #if _MIPS_SIM == _ABI64
46 asm volatile ("l.d $f24, %0" : : "m" (env[0].__fpregs[0]));
47 asm volatile ("l.d $f25, %0" : : "m" (env[0].__fpregs[1]));
48 asm volatile ("l.d $f26, %0" : : "m" (env[0].__fpregs[2]));
49 asm volatile ("l.d $f27, %0" : : "m" (env[0].__fpregs[3]));
50 asm volatile ("l.d $f28, %0" : : "m" (env[0].__fpregs[4]));
51 asm volatile ("l.d $f29, %0" : : "m" (env[0].__fpregs[5]));
52 asm volatile ("l.d $f30, %0" : : "m" (env[0].__fpregs[6]));
53 asm volatile ("l.d $f31, %0" : : "m" (env[0].__fpregs[7]));
55 asm volatile ("l.d $f20, %0" : : "m" (env[0].__fpregs[0]));
56 asm volatile ("l.d $f22, %0" : : "m" (env[0].__fpregs[1]));
57 asm volatile ("l.d $f24, %0" : : "m" (env[0].__fpregs[2]));
58 asm volatile ("l.d $f26, %0" : : "m" (env[0].__fpregs[3]));
59 asm volatile ("l.d $f28, %0" : : "m" (env[0].__fpregs[4]));
60 asm volatile ("l.d $f30, %0" : : "m" (env[0].__fpregs[5]));
63 /* Get and reconstruct the floating point csr. */
64 asm volatile ("lw $2, %0" : : "m" (env[0].__fpc_csr));
65 asm volatile ("ctc1 $2, $31");
69 asm volatile ("ld $gp, %0" : : "m" (env[0].__gp));
71 /* Get the callee-saved registers. */
72 asm volatile ("ld $16, %0" : : "m" (env[0].__regs[0]));
73 asm volatile ("ld $17, %0" : : "m" (env[0].__regs[1]));
74 asm volatile ("ld $18, %0" : : "m" (env[0].__regs[2]));
75 asm volatile ("ld $19, %0" : : "m" (env[0].__regs[3]));
76 asm volatile ("ld $20, %0" : : "m" (env[0].__regs[4]));
77 asm volatile ("ld $21, %0" : : "m" (env[0].__regs[5]));
78 asm volatile ("ld $22, %0" : : "m" (env[0].__regs[6]));
79 asm volatile ("ld $23, %0" : : "m" (env[0].__regs[7]));
82 asm volatile ("ld $31, %0" : : "m" (env[0].__pc));
85 /* Restore the stack pointer and the FP. They have to be restored
86 last and in a single asm as gcc, depending on options used, may
87 use either of them to access env. */
88 asm volatile ("ld $29, %0\n\t"
89 "ld $30, %1\n\t" : : "m" (env[0].__sp), "m" (env[0].__fp));
91 /* Give setjmp 1 if given a 0, or what they gave us if non-zero. */
93 asm volatile ("dli $2, 1");
95 asm volatile ("move $2, %0" : : "r" (val));
97 asm volatile ("j $31");
99 /* Avoid `volatile function does return' warnings. */