1 /* Copyright (C) 1992, 1995, 1997, 2000, 2003, 2004, 2009
2 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Brendan Kehoe (brendan@zen.org).
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
26 #error This file uses GNU C extensions; you must compile with GCC.
30 __longjmp (env_arg
, val_arg
)
34 /* gcc 1.39.19 miscompiled the longjmp routine (as it did setjmp before
35 the hack around it); force it to use $a1 for the longjmp value.
36 Without this it saves $a1 in a register which gets clobbered
38 register struct __jmp_buf_internal_tag
*env
asm ("a0");
39 register int val
asm ("a1");
41 register long long sp
asm ("$29");
42 CHECK_SP (env
[0].__sp
, sp
, long long);
45 #ifdef __mips_hard_float
46 /* Pull back the floating point callee-saved registers. */
47 #if _MIPS_SIM == _ABI64
48 asm volatile ("l.d $f24, %0" : : "m" (env
[0].__fpregs
[0]));
49 asm volatile ("l.d $f25, %0" : : "m" (env
[0].__fpregs
[1]));
50 asm volatile ("l.d $f26, %0" : : "m" (env
[0].__fpregs
[2]));
51 asm volatile ("l.d $f27, %0" : : "m" (env
[0].__fpregs
[3]));
52 asm volatile ("l.d $f28, %0" : : "m" (env
[0].__fpregs
[4]));
53 asm volatile ("l.d $f29, %0" : : "m" (env
[0].__fpregs
[5]));
54 asm volatile ("l.d $f30, %0" : : "m" (env
[0].__fpregs
[6]));
55 asm volatile ("l.d $f31, %0" : : "m" (env
[0].__fpregs
[7]));
57 asm volatile ("l.d $f20, %0" : : "m" (env
[0].__fpregs
[0]));
58 asm volatile ("l.d $f22, %0" : : "m" (env
[0].__fpregs
[1]));
59 asm volatile ("l.d $f24, %0" : : "m" (env
[0].__fpregs
[2]));
60 asm volatile ("l.d $f26, %0" : : "m" (env
[0].__fpregs
[3]));
61 asm volatile ("l.d $f28, %0" : : "m" (env
[0].__fpregs
[4]));
62 asm volatile ("l.d $f30, %0" : : "m" (env
[0].__fpregs
[5]));
65 /* Get and reconstruct the floating point csr. */
66 asm volatile ("lw $2, %0" : : "m" (env
[0].__fpc_csr
));
67 asm volatile ("ctc1 $2, $31");
71 asm volatile ("ld $gp, %0" : : "m" (env
[0].__gp
));
73 /* Get the callee-saved registers. */
74 asm volatile ("ld $16, %0" : : "m" (env
[0].__regs
[0]));
75 asm volatile ("ld $17, %0" : : "m" (env
[0].__regs
[1]));
76 asm volatile ("ld $18, %0" : : "m" (env
[0].__regs
[2]));
77 asm volatile ("ld $19, %0" : : "m" (env
[0].__regs
[3]));
78 asm volatile ("ld $20, %0" : : "m" (env
[0].__regs
[4]));
79 asm volatile ("ld $21, %0" : : "m" (env
[0].__regs
[5]));
80 asm volatile ("ld $22, %0" : : "m" (env
[0].__regs
[6]));
81 asm volatile ("ld $23, %0" : : "m" (env
[0].__regs
[7]));
84 asm volatile ("ld $31, %0" : : "m" (env
[0].__pc
));
87 /* Restore the stack pointer and the FP. They have to be restored
88 last and in a single asm as gcc, depending on options used, may
89 use either of them to access env. */
90 asm volatile ("ld $29, %0\n\t"
91 "ld $30, %1\n\t" : : "m" (env
[0].__sp
), "m" (env
[0].__fp
));
93 /* Give setjmp 1 if given a 0, or what they gave us if non-zero. */
95 asm volatile ("dli $2, 1");
97 asm volatile ("move $2, %0" : : "r" (val
));
99 asm volatile ("j $31");
101 /* Avoid `volatile function does return' warnings. */