1 /* Copyright (C) 1992, 1995, 1997, 2000 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/>. */
25 #error This file uses GNU C extensions; you must compile with GCC.
28 extern void __longjmp (__jmp_buf __env, int __val) attribute_noreturn;
29 libc_hidden_proto(__longjmp)
31 void __longjmp (__jmp_buf env, int val_arg)
33 /* gcc 1.39.19 miscompiled the longjmp routine (as it did setjmp before
34 the hack around it); force it to use $a1 for the longjmp value.
35 Without this it saves $a1 in a register which gets clobbered
37 register int val __asm__ ("a1");
39 /* Pull back the floating point callee-saved registers. */
40 #if defined __UCLIBC_HAS_FLOATS__ && ! defined __UCLIBC_HAS_SOFT_FLOAT__
41 #if _MIPS_SIM == _MIPS_SIM_ABI64
42 __asm__ __volatile__ ("l.d $f24, %0" : : "m" (env[0].__fpregs[0]));
43 __asm__ __volatile__ ("l.d $f25, %0" : : "m" (env[0].__fpregs[1]));
44 __asm__ __volatile__ ("l.d $f26, %0" : : "m" (env[0].__fpregs[2]));
45 __asm__ __volatile__ ("l.d $f27, %0" : : "m" (env[0].__fpregs[3]));
46 __asm__ __volatile__ ("l.d $f28, %0" : : "m" (env[0].__fpregs[4]));
47 __asm__ __volatile__ ("l.d $f29, %0" : : "m" (env[0].__fpregs[5]));
48 __asm__ __volatile__ ("l.d $f30, %0" : : "m" (env[0].__fpregs[6]));
49 __asm__ __volatile__ ("l.d $f31, %0" : : "m" (env[0].__fpregs[7]));
50 #else /* O32 || N32 */
51 __asm__ __volatile__ ("l.d $f20, %0" : : "m" (env[0].__fpregs[0]));
52 __asm__ __volatile__ ("l.d $f22, %0" : : "m" (env[0].__fpregs[1]));
53 __asm__ __volatile__ ("l.d $f24, %0" : : "m" (env[0].__fpregs[2]));
54 __asm__ __volatile__ ("l.d $f26, %0" : : "m" (env[0].__fpregs[3]));
55 __asm__ __volatile__ ("l.d $f28, %0" : : "m" (env[0].__fpregs[4]));
56 __asm__ __volatile__ ("l.d $f30, %0" : : "m" (env[0].__fpregs[5]));
57 #endif /* O32 || N32 */
59 /* Get and reconstruct the floating point csr. */
60 __asm__ __volatile__ ("lw $2, %0" : : "m" (env[0].__fpc_csr));
61 __asm__ __volatile__ ("ctc1 $2, $31");
65 #if _MIPS_SIM == _MIPS_SIM_ABI64
66 __asm__ __volatile__ ("ld $gp, %0" : : "m" (env[0].__gp));
67 #else /* O32 || N32 */
68 __asm__ __volatile__ ("lw $gp, %0" : : "m" (env[0].__gp));
69 #endif /* O32 || N32 */
71 /* Get the callee-saved registers. */
72 #if _MIPS_SIM == _MIPS_SIM_ABI32
73 __asm__ __volatile__ ("lw $16, %0" : : "m" (env[0].__regs[0]));
74 __asm__ __volatile__ ("lw $17, %0" : : "m" (env[0].__regs[1]));
75 __asm__ __volatile__ ("lw $18, %0" : : "m" (env[0].__regs[2]));
76 __asm__ __volatile__ ("lw $19, %0" : : "m" (env[0].__regs[3]));
77 __asm__ __volatile__ ("lw $20, %0" : : "m" (env[0].__regs[4]));
78 __asm__ __volatile__ ("lw $21, %0" : : "m" (env[0].__regs[5]));
79 __asm__ __volatile__ ("lw $22, %0" : : "m" (env[0].__regs[6]));
80 __asm__ __volatile__ ("lw $23, %0" : : "m" (env[0].__regs[7]));
81 #else /* N32 || N64 */
82 __asm__ __volatile__ ("ld $16, %0" : : "m" (env[0].__regs[0]));
83 __asm__ __volatile__ ("ld $17, %0" : : "m" (env[0].__regs[1]));
84 __asm__ __volatile__ ("ld $18, %0" : : "m" (env[0].__regs[2]));
85 __asm__ __volatile__ ("ld $19, %0" : : "m" (env[0].__regs[3]));
86 __asm__ __volatile__ ("ld $20, %0" : : "m" (env[0].__regs[4]));
87 __asm__ __volatile__ ("ld $21, %0" : : "m" (env[0].__regs[5]));
88 __asm__ __volatile__ ("ld $22, %0" : : "m" (env[0].__regs[6]));
89 __asm__ __volatile__ ("ld $23, %0" : : "m" (env[0].__regs[7]));
90 #endif /* N32 || N64 */
93 #if _MIPS_SIM == _MIPS_SIM_ABI32
94 __asm__ __volatile__ ("lw $25, %0" : : "m" (env[0].__pc));
95 #elif _MIPS_SIM == _MIPS_SIM_NABI32
96 __asm__ __volatile__ ("lw $31, %0" : : "m" (env[0].__pc));
98 __asm__ __volatile__ ("ld $31, %0" : : "m" (env[0].__pc));
101 /* Restore the stack pointer and the FP. They have to be restored
102 last and in a single asm as gcc, depending on options used, may
103 use either of them to access env. */
104 #if _MIPS_SIM == _MIPS_SIM_ABI64
105 __asm__ __volatile__ ("ld $29, %0\n\t"
106 "ld $30, %1\n\t" : : "m" (env[0].__sp), "m" (env[0].__fp));
107 #else /* O32 || N32 */
108 __asm__ __volatile__ ("lw $29, %0\n\t"
109 "lw $30, %1\n\t" : : "m" (env[0].__sp), "m" (env[0].__fp));
110 #endif /* O32 || N32 */
112 /* Give setjmp 1 if given a 0, or what they gave us if non-zero. */
114 __asm__ __volatile__ ("li $2, 1");
116 __asm__ __volatile__ ("move $2, %0" : : "r" (val));
118 #if _MIPS_SIM == _MIPS_SIM_ABI32
119 __asm__ __volatile__ ("jr $25");
120 #else /* N32 || N64 */
121 __asm__ __volatile__ ("jr $31");
122 #endif /* N32 || N64 */
124 /* Avoid `volatile function does return' warnings. */
127 libc_hidden_def(__longjmp)