1 /* $NetBSD: compat__setjmp.S,v 1.4 2014/01/24 10:19:18 skrll Exp $ */
4 * Copyright (c) 1994, 1995 Carnegie-Mellon University.
7 * Author: Chris G. Demetriou
9 * Permission to use, copy, modify and distribute this software and
10 * its documentation is hereby granted, provided that both the copyright
11 * notice and this permission notice appear in all copies of the
12 * software, derivative works or modified versions, and any portions
13 * thereof, and that both notices appear in supporting documentation.
15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
19 * Carnegie Mellon requests users of this software to return to
21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
22 * School of Computer Science
23 * Carnegie Mellon University
24 * Pittsburgh PA 15213-3890
26 * any improvements or extensions that they make and grant Carnegie the
27 * rights to redistribute these changes.
30 #include <machine/asm.h>
33 * C library -- _setjmp, _longjmp
36 * will generate a "return(v)" from
39 * by restoring registers from the stack,
40 * The previous signal state is NOT restored.
47 stq ra, (2 * 8)(a0) /* sc_pc = return address */
48 stq s0, (( 9 + 4) * 8)(a0) /* saved bits of sc_regs */
49 stq s1, ((10 + 4) * 8)(a0)
50 stq s2, ((11 + 4) * 8)(a0)
51 stq s3, ((12 + 4) * 8)(a0)
52 stq s4, ((13 + 4) * 8)(a0)
53 stq s5, ((14 + 4) * 8)(a0)
54 stq s6, ((15 + 4) * 8)(a0)
55 stq ra, ((26 + 4) * 8)(a0)
56 stq sp, ((30 + 4) * 8)(a0)
57 ldq t0, magic /* sigcontext magic number */
58 stq t0, ((31 + 4) * 8)(a0) /* magic in sc_regs[31] */
59 /* Too bad we can't check if we actually used FP */
61 stq t0, (36 * 8)(a0) /* say we've used FP. */
62 stt fs0, ((2 + 37) * 8)(a0) /* saved bits of sc_fpregs */
63 stt fs1, ((3 + 37) * 8)(a0)
64 stt fs2, ((4 + 37) * 8)(a0)
65 stt fs3, ((5 + 37) * 8)(a0)
66 stt fs4, ((6 + 37) * 8)(a0)
67 stt fs5, ((7 + 37) * 8)(a0)
68 stt fs6, ((8 + 37) * 8)(a0)
69 stt fs7, ((9 + 37) * 8)(a0)
70 mf_fpcr ft0 /* get FP control reg */
71 stt ft0, (69 * 8)(a0) /* and store it in sc_fpcr */
72 stq zero, (70 * 8)(a0) /* FP software control XXX */
73 stq zero, (71 * 8)(a0) /* sc_reserved[0] */
74 stq zero, (72 * 8)(a0) /* sc_reserved[1] */
75 stq zero, (73 * 8)(a0) /* sc_xxx[0] */
76 stq zero, (74 * 8)(a0) /* sc_xxx[1] */
77 stq zero, (75 * 8)(a0) /* sc_xxx[2] */
78 stq zero, (76 * 8)(a0) /* sc_xxx[3] */
79 stq zero, (77 * 8)(a0) /* sc_xxx[4] */
80 stq zero, (78 * 8)(a0) /* sc_xxx[5] */
81 stq zero, (79 * 8)(a0) /* sc_xxx[6] */
82 stq zero, (80 * 8)(a0) /* sc_xxx[7] */
84 mov zero, v0 /* return zero */
92 ldq t0, ((31 + 4) * 8)(a0) /* magic in sc_regs[31] */
93 ldq t1, magic /* sigcontext magic number */
95 beq t0, botch /* If the magic was bad, punt */
97 ldq ra, (2 * 8)(a0) /* sc_pc = return address */
98 ldq s0, (( 9 + 4) * 8)(a0) /* saved bits of sc_regs */
99 ldq s1, ((10 + 4) * 8)(a0)
100 ldq s2, ((11 + 4) * 8)(a0)
101 ldq s3, ((12 + 4) * 8)(a0)
102 ldq s4, ((13 + 4) * 8)(a0)
103 ldq s5, ((14 + 4) * 8)(a0)
104 ldq s6, ((15 + 4) * 8)(a0)
105 /* ldq ra, ((26 + 4) * 8)(a0) set above */
106 ldq sp, ((30 + 4) * 8)(a0)
107 ldt fs0, ((2 + 37) * 8)(a0) /* saved bits of sc_fpregs */
108 ldt fs1, ((3 + 37) * 8)(a0)
109 ldt fs2, ((4 + 37) * 8)(a0)
110 ldt fs3, ((5 + 37) * 8)(a0)
111 ldt fs4, ((6 + 37) * 8)(a0)
112 ldt fs5, ((7 + 37) * 8)(a0)
113 ldt fs6, ((8 + 37) * 8)(a0)
114 ldt fs7, ((9 + 37) * 8)(a0)
115 ldt ft0, (69 * 8)(a0) /* get sc_fpcr */
116 mt_fpcr ft0 /* and restore it. */
118 mov a1, v0 /* return second arg */
124 RET /* "can't" get here... */