xref: /netbsd-src/lib/libc/compat/arch/mips/gen/compat_setjmp.S (revision 252fbae288411a7ff535f9cf805079a3186f863d)
1*252fbae2Sskrll/*	$NetBSD: compat_setjmp.S,v 1.5 2020/10/15 05:27:53 skrll Exp $	*/
2f80595caStsutsui
3f80595caStsutsui/*-
4f80595caStsutsui * Copyright (c) 1991, 1993
5f80595caStsutsui *	The Regents of the University of California.  All rights reserved.
6f80595caStsutsui *
7f80595caStsutsui * This code is derived from software contributed to Berkeley by
8f80595caStsutsui * Ralph Campbell.
9f80595caStsutsui *
10f80595caStsutsui * Redistribution and use in source and binary forms, with or without
11f80595caStsutsui * modification, are permitted provided that the following conditions
12f80595caStsutsui * are met:
13f80595caStsutsui * 1. Redistributions of source code must retain the above copyright
14f80595caStsutsui *    notice, this list of conditions and the following disclaimer.
15f80595caStsutsui * 2. Redistributions in binary form must reproduce the above copyright
16f80595caStsutsui *    notice, this list of conditions and the following disclaimer in the
17f80595caStsutsui *    documentation and/or other materials provided with the distribution.
18f80595caStsutsui * 3. Neither the name of the University nor the names of its contributors
19f80595caStsutsui *    may be used to endorse or promote products derived from this software
20f80595caStsutsui *    without specific prior written permission.
21f80595caStsutsui *
22f80595caStsutsui * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23f80595caStsutsui * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24f80595caStsutsui * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25f80595caStsutsui * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26f80595caStsutsui * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27f80595caStsutsui * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28f80595caStsutsui * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29f80595caStsutsui * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30f80595caStsutsui * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31f80595caStsutsui * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32f80595caStsutsui * SUCH DAMAGE.
33f80595caStsutsui */
34f80595caStsutsui
35f80595caStsutsui#include <sys/syscall.h>
36f80595caStsutsui#include <mips/asm.h>
37f45a8c29Smatt
38f45a8c29Smatt#include "assym.h"
39f80595caStsutsui
40f80595caStsutsui#if defined(LIBC_SCCS) && !defined(lint)
41f45a8c29Smatt#if 0
42f45a8c29Smatt	RCSID("from: @(#)setjmp.s	8.1 (Berkeley) 6/4/93")
43f45a8c29Smatt#else
44*252fbae2Sskrll	RCSID("$NetBSD: compat_setjmp.S,v 1.5 2020/10/15 05:27:53 skrll Exp $")
45f80595caStsutsui#endif
46f45a8c29Smatt#endif /* LIBC_SCCS and not lint */
47f80595caStsutsui
48f80595caStsutsui/*
49f80595caStsutsui * C library -- setjmp, longjmp
50f80595caStsutsui *
51f80595caStsutsui *	longjmp(a,v)
52f80595caStsutsui * will generate a "return(v)" from
53f80595caStsutsui * the last call to
54f80595caStsutsui *	setjmp(a)
55f80595caStsutsui * by restoring registers from the stack,
56f80595caStsutsui * and a struct sigcontext, see <signal.h>
57f80595caStsutsui */
58f80595caStsutsui
59f45a8c29Smatt#define SETJMP_FRAME_SIZE	(CALLFRAME_SIZ + STACK_T_SIZE)
60f80595caStsutsui
61f80595caStsutsuiNON_LEAF(setjmp, SETJMP_FRAME_SIZE, ra)
62f45a8c29Smatt	.mask	0x80010000, (CALLFRAME_RA - CALLFRAME_SIZ)
63f45a8c29Smatt	SETUP_GP
64f45a8c29Smatt	PTR_SUBU	sp, sp, SETJMP_FRAME_SIZE	# allocate stack frame
65f45a8c29Smatt	SAVE_GP(CALLFRAME_GP)
66f45a8c29Smatt	SETUP_GP64(CALLFRAME_GP, setjmp)
67f45a8c29Smatt
68f45a8c29Smatt	REG_S		ra, CALLFRAME_RA(sp)		# save RA
69f45a8c29Smatt	REG_S		s0, CALLFRAME_S0(sp)		# save S0
70f45a8c29Smatt	move		s0, a0				# save sigcontext
71f45a8c29Smatt
72f45a8c29Smatt	/* Get the signal mask. */
73f45a8c29Smatt	move		a0, zero			# get current sigmask
74f80595caStsutsui	jal		_C_LABEL(sigblock)
75f45a8c29Smatt	nop
76*252fbae2Sskrll	INT_S		v0, _SC_MASK13(s0)		# save sc_mask13
77f45a8c29Smatt
78f45a8c29Smatt	/* Get the signal stack. */
79f80595caStsutsui	move		a0, zero
80f45a8c29Smatt	PTR_ADDU	a1, sp, CALLFRAME_SIZ		# pointer to stack_t
81f80595caStsutsui	jal		_C_LABEL(__sigaltstack14)
82f45a8c29Smatt
83f45a8c29Smatt	move		a0, s0				# restore jmpbuf
84*252fbae2Sskrll	INT_L		v1, CALLFRAME_SIZ+_STACK_T_FLAGS(sp)
85f45a8c29Smatt							# get old ss_onstack
86f45a8c29Smatt	and		v1, v1, SS_ONSTACK		# extract onstack flag
87*252fbae2Sskrll	INT_S		v1, _SC_ONSTACK(a0)		# save it in sc_onstack
88f45a8c29Smatt
89f45a8c29Smatt	REG_L		s0, CALLFRAME_S0(sp)		# restore S0
90f45a8c29Smatt	REG_L		ra, CALLFRAME_RA(sp)		# restore RA
91f45a8c29Smatt	blt		v0, zero, botch			# check for sigaltstack() error
92f45a8c29Smatt	nop
93f45a8c29Smatt	/*
94f45a8c29Smatt	 * We know we won't need this routine's GP anymore.
95f45a8c29Smatt	 */
96f45a8c29Smatt	RESTORE_GP64
97f45a8c29Smatt	PTR_ADDU	sp, sp, SETJMP_FRAME_SIZE	# pop stack frame
98f45a8c29Smatt
99f80595caStsutsui	REG_PROLOGUE
100*252fbae2Sskrll	REG_S	ra, _SC_PC(a0)				# sc_pc = return address
101f80595caStsutsui	REG_LI	v0, 0xACEDBADE				# sigcontext magic number
102*252fbae2Sskrll	REG_S	v0, _SC_REGS(a0)			#   saved in sc_regs[0]
103*252fbae2Sskrll	REG_S	s0, _SC_REGS_S0(a0)
104*252fbae2Sskrll	REG_S	s1, _SC_REGS_S1(a0)
105*252fbae2Sskrll	REG_S	s2, _SC_REGS_S2(a0)
106*252fbae2Sskrll	REG_S	s3, _SC_REGS_S3(a0)
107*252fbae2Sskrll	REG_S	s4, _SC_REGS_S4(a0)
108*252fbae2Sskrll	REG_S	s5, _SC_REGS_S5(a0)
109*252fbae2Sskrll	REG_S	s6, _SC_REGS_S6(a0)
110*252fbae2Sskrll	REG_S	s7, _SC_REGS_S7(a0)
111*252fbae2Sskrll	REG_S	gp, _SC_REGS_GP(a0)
112*252fbae2Sskrll	REG_S	sp, _SC_REGS_SP(a0)
113*252fbae2Sskrll	REG_S	s8, _SC_REGS_S8(a0)
1141d939007Smartin#ifdef SOFTFLOAT_FOR_GCC
115*252fbae2Sskrll	INT_S	zero, _SC_FPUSED(a0)			# sc_fpused = 0
1161d939007Smartin#else
117f80595caStsutsui	li	v0, 1					# be nice if we could tell
118*252fbae2Sskrll	INT_S	v0, _SC_FPUSED(a0)			# sc_fpused = 1
119f80595caStsutsui	cfc1	v0, $31
120*252fbae2Sskrll	INT_S	v0, _SC_FPREGS_FCSR(a0)
121f45a8c29Smatt#if defined(__mips_o32) || defined(__mips_o64) || defined(__mips_n32)
122*252fbae2Sskrll	FP_S	$f20, _SC_FPREGS_F20(a0)
123*252fbae2Sskrll	FP_S	$f22, _SC_FPREGS_F22(a0)
124f45a8c29Smatt#endif
125f45a8c29Smatt#if defined(__mips_o32) || defined(__mips_o64)
126*252fbae2Sskrll	FP_S	$f21, _SC_FPREGS_F21(a0)
127*252fbae2Sskrll	FP_S	$f23, _SC_FPREGS_F23(a0)
128f45a8c29Smatt#endif
129f45a8c29Smatt#if defined(__mips_n32) || defined(__mips_n64)
130*252fbae2Sskrll	FP_S	$f24, _SC_FPREGS_F24(a0)
131*252fbae2Sskrll	FP_S	$f26, _SC_FPREGS_F26(a0)
132*252fbae2Sskrll	FP_S	$f28, _SC_FPREGS_F28(a0)
133*252fbae2Sskrll	FP_S	$f30, _SC_FPREGS_F30(a0)
134f45a8c29Smatt#endif
135f45a8c29Smatt#if defined(__mips_n64)
136*252fbae2Sskrll	FP_S	$f25, _SC_FPREGS_F25(a0)
137*252fbae2Sskrll	FP_S	$f27, _SC_FPREGS_F27(a0)
138*252fbae2Sskrll	FP_S	$f29, _SC_FPREGS_F29(a0)
139*252fbae2Sskrll	FP_S	$f31, _SC_FPREGS_F31(a0)
140f45a8c29Smatt#endif
1411d939007Smartin#endif	/* SOFTFLOAT_FOR_GCC */
142f80595caStsutsui	REG_EPILOGUE
143f80595caStsutsui	j	ra
144f45a8c29Smatt	move	v0, zero
145f45a8c29Smatt
146f45a8c29Smattbotch:
147f45a8c29Smatt	jal	_C_LABEL(abort)
148f80595caStsutsuiEND(setjmp)
149f80595caStsutsui
150f80595caStsutsuiLEAF(longjmp)
151f45a8c29Smatt	SETUP_GP
152f45a8c29Smatt	PTR_SUBU	sp, sp, CALLFRAME_SIZ
153f45a8c29Smatt	SAVE_GP(CALLFRAME_S0)
154f45a8c29Smatt	SETUP_GP64(s0, longjmp)
155f45a8c29Smatt
156f80595caStsutsui	REG_PROLOGUE
157f80595caStsutsui	/* save return value in sc_regs[_R_V0] */
158*252fbae2Sskrll	REG_S		a1, _SC_REGS_V0(a0)
159f80595caStsutsui	REG_EPILOGUE
160f45a8c29Smatt
161f80595caStsutsui	li		v0, SYS_compat_13_sigreturn13
162f80595caStsutsui	syscall
163f45a8c29Smatt
164f80595caStsutsui	jal		_C_LABEL(longjmperror)
165f80595caStsutsui	jal		_C_LABEL(abort)
166f80595caStsutsuiEND(longjmp)
167