[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / mips / getcontext.S

/* Save current context.
   Copyright (C) 2009-2019 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Maciej W. Rozycki <macro@codesourcery.com>.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library.  If not, see
   <https://www.gnu.org/licenses/>.  */

#include <sysdep.h>
#include <sys/asm.h>
#include <sys/fpregdef.h>
#include <sys/regdef.h>

#include "ucontext_i.h"

/* int getcontext (ucontext_t *ucp) */

	.text
	.set	nomips16
LOCALSZ = 0
MASK = 0x00000000
#ifdef __PIC__
LOCALSZ = 1						/* save gp */
# if _MIPS_SIM != _ABIO32
MASK = 0x10000000
# endif
#endif
FRAMESZ = ((LOCALSZ * SZREG) + ALSZ) & ALMASK
GPOFF = FRAMESZ - (1 * SZREG)
MCONTEXT_GREGSZ = 8
#if _MIPS_SIM == _ABIO32 && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
MCONTEXT_GREGOFF = 4
#else
MCONTEXT_GREGOFF = 0
#endif

NESTED (__getcontext, FRAMESZ, ra)
	.mask	MASK, 0
	.fmask	0x00000000, 0

#ifdef __PIC__
	SETUP_GP

	move	a2, sp
# define _SP a2

# if _MIPS_SIM != _ABIO32
	move	a3, gp
#  define _GP a3
# endif

	PTR_ADDIU sp, -FRAMESZ
	cfi_adjust_cfa_offset (FRAMESZ)
	SETUP_GP64_STACK (GPOFF, __getcontext)
	SAVE_GP (GPOFF)

#else  /* ! __PIC__ */
# define _SP sp
# define _GP gp

#endif /* ! __PIC__ */

#ifdef PROF
	.set	noat
	move	AT, ra
	jal	_mcount
	.set	at
#endif

	REG_S	s0, (MCONTEXT_GREGOFF + 16 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	REG_S	s1, (MCONTEXT_GREGOFF + 17 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	REG_S	s2, (MCONTEXT_GREGOFF + 18 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	REG_S	s3, (MCONTEXT_GREGOFF + 19 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	REG_S	s4, (MCONTEXT_GREGOFF + 20 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	REG_S	s5, (MCONTEXT_GREGOFF + 21 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	REG_S	s6, (MCONTEXT_GREGOFF + 22 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	REG_S	s7, (MCONTEXT_GREGOFF + 23 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32
	REG_S	_GP, (MCONTEXT_GREGOFF + 28 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
#endif
	REG_S	_SP, (MCONTEXT_GREGOFF + 29 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	REG_S	fp, (MCONTEXT_GREGOFF + 30 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	REG_S	ra, (MCONTEXT_GREGOFF + 31 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	REG_S	ra, (MCONTEXT_GREGOFF + MCONTEXT_PC)(a0)

#ifdef __mips_hard_float
# if _MIPS_SIM == _ABI64
	s.d	fs0, (24 * SZREG + MCONTEXT_FPREGS)(a0)
	s.d	fs1, (25 * SZREG + MCONTEXT_FPREGS)(a0)
	s.d	fs2, (26 * SZREG + MCONTEXT_FPREGS)(a0)
	s.d	fs3, (27 * SZREG + MCONTEXT_FPREGS)(a0)
	s.d	fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0)
	s.d	fs5, (29 * SZREG + MCONTEXT_FPREGS)(a0)
	s.d	fs6, (30 * SZREG + MCONTEXT_FPREGS)(a0)
	s.d	fs7, (31 * SZREG + MCONTEXT_FPREGS)(a0)

# else  /* _MIPS_SIM != _ABI64 */
	s.d	fs0, (20 * SZREG + MCONTEXT_FPREGS)(a0)
	s.d	fs1, (22 * SZREG + MCONTEXT_FPREGS)(a0)
	s.d	fs2, (24 * SZREG + MCONTEXT_FPREGS)(a0)
	s.d	fs3, (26 * SZREG + MCONTEXT_FPREGS)(a0)
	s.d	fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0)
	s.d	fs5, (30 * SZREG + MCONTEXT_FPREGS)(a0)

# endif /* _MIPS_SIM != _ABI64 */

	cfc1	v1, fcr31
	sw	v1, MCONTEXT_FPC_CSR(a0)
#endif /* __mips_hard_float */

/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
	li	a3, _NSIG8
	PTR_ADDU a2, a0, UCONTEXT_SIGMASK
	move	a1, zero
	li	a0, SIG_BLOCK

	li	v0, SYS_ify (rt_sigprocmask)
	syscall
	bnez	a3, 99f
	cfi_remember_state

#ifdef __PIC__
	RESTORE_GP64_STACK
	PTR_ADDIU sp, FRAMESZ
	cfi_adjust_cfa_offset (-FRAMESZ)
#endif
	move	v0, zero
	jr	ra

99:
	cfi_restore_state
#ifdef __PIC__
	PTR_LA	t9, JUMPTARGET (__syscall_error)
	RESTORE_GP64_STACK
	PTR_ADDIU sp, FRAMESZ
	cfi_adjust_cfa_offset (-FRAMESZ)
	jr	t9

#else  /* ! __PIC__ */

	j	JUMPTARGET (__syscall_error)
#endif /* ! __PIC__ */
PSEUDO_END (__getcontext)

weak_alias (__getcontext, getcontext)
Commit	Line	Data
ff347533	1	/* Save current context.
04277e02	2	Copyright (C) 2009-2019 Free Software Foundation, Inc.
ff347533 JM	3	This file is part of the GNU C Library.
	4	Contributed by Maciej W. Rozycki <macro@codesourcery.com>.
	5
	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.
	10
	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.
	15
	16	You should have received a copy of the GNU Lesser General Public
ab84e3ff	17	License along with the GNU C Library. If not, see
5a82c748	18	<https://www.gnu.org/licenses/>. */
ff347533 JM	19
	20	#include <sysdep.h>
	21	#include <sys/asm.h>
	22	#include <sys/fpregdef.h>
	23	#include <sys/regdef.h>
	24
	25	#include "ucontext_i.h"
	26
	27	/* int getcontext (ucontext_t ucp) /
	28
	29	.text
43301bd3	30	.set nomips16
ff347533 JM	31	LOCALSZ = 0
	32	MASK = 0x00000000
	33	#ifdef __PIC__
	34	LOCALSZ = 1 /* save gp */
	35	# if _MIPS_SIM != _ABIO32
	36	MASK = 0x10000000
	37	# endif
	38	#endif
	39	FRAMESZ = ((LOCALSZ * SZREG) + ALSZ) & ALMASK
	40	GPOFF = FRAMESZ - (1 * SZREG)
b309f058 GC	41	MCONTEXT_GREGSZ = 8
	42	#if _MIPS_SIM == _ABIO32 && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
	43	MCONTEXT_GREGOFF = 4
	44	#else
	45	MCONTEXT_GREGOFF = 0
	46	#endif
ff347533 JM	47
	48	NESTED (__getcontext, FRAMESZ, ra)
	49	.mask MASK, 0
	50	.fmask 0x00000000, 0
	51
	52	#ifdef __PIC__
	53	SETUP_GP
	54
	55	move a2, sp
	56	# define _SP a2
	57
	58	# if _MIPS_SIM != _ABIO32
	59	move a3, gp
	60	# define _GP a3
	61	# endif
	62
	63	PTR_ADDIU sp, -FRAMESZ
aea7a9b9 JM	64	cfi_adjust_cfa_offset (FRAMESZ)
aea7a9b9 JM	65	SETUP_GP64_STACK (GPOFF, __getcontext)
ff347533 JM	66	SAVE_GP (GPOFF)
	67
	68	#else /* ! __PIC__ */
	69	# define _SP sp
	70	# define _GP gp
	71
	72	#endif /* ! __PIC__ */
	73
	74	#ifdef PROF
	75	.set noat
	76	move AT, ra
	77	jal _mcount
	78	.set at
	79	#endif
	80
b309f058 GC	81	REG_S s0, (MCONTEXT_GREGOFF + 16 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	82	REG_S s1, (MCONTEXT_GREGOFF + 17 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	83	REG_S s2, (MCONTEXT_GREGOFF + 18 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	84	REG_S s3, (MCONTEXT_GREGOFF + 19 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	85	REG_S s4, (MCONTEXT_GREGOFF + 20 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	86	REG_S s5, (MCONTEXT_GREGOFF + 21 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	87	REG_S s6, (MCONTEXT_GREGOFF + 22 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	88	REG_S s7, (MCONTEXT_GREGOFF + 23 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
ff347533	89	#if ! defined (__PIC__) \|\| _MIPS_SIM != _ABIO32
b309f058	90	REG_S _GP, (MCONTEXT_GREGOFF + 28 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
ff347533	91	#endif
b309f058 GC	92	REG_S _SP, (MCONTEXT_GREGOFF + 29 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	93	REG_S fp, (MCONTEXT_GREGOFF + 30 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	94	REG_S ra, (MCONTEXT_GREGOFF + 31 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0)
	95	REG_S ra, (MCONTEXT_GREGOFF + MCONTEXT_PC)(a0)
ff347533 JM	96
	97	#ifdef __mips_hard_float
	98	# if _MIPS_SIM == _ABI64
	99	s.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(a0)
	100	s.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(a0)
	101	s.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(a0)
	102	s.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(a0)
	103	s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0)
	104	s.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(a0)
	105	s.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(a0)
	106	s.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(a0)
	107
	108	# else /* _MIPS_SIM != _ABI64 */
	109	s.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(a0)
	110	s.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(a0)
	111	s.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(a0)
	112	s.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(a0)
	113	s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0)
	114	s.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(a0)
	115
	116	# endif /* _MIPS_SIM != _ABI64 */
	117
	118	cfc1 v1, fcr31
	119	sw v1, MCONTEXT_FPC_CSR(a0)
	120	#endif /* __mips_hard_float */
	121
	122	/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
	123	li a3, _NSIG8
	124	PTR_ADDU a2, a0, UCONTEXT_SIGMASK
	125	move a1, zero
	126	li a0, SIG_BLOCK
	127
	128	li v0, SYS_ify (rt_sigprocmask)
	129	syscall
	130	bnez a3, 99f
aea7a9b9	131	cfi_remember_state
ff347533 JM	132
ff347533 JM	133	#ifdef __PIC__
aea7a9b9	134	RESTORE_GP64_STACK
ff347533	135	PTR_ADDIU sp, FRAMESZ
aea7a9b9	136	cfi_adjust_cfa_offset (-FRAMESZ)
ff347533 JM	137	#endif
	138	move v0, zero
	139	jr ra
	140
	141	99:
aea7a9b9	142	cfi_restore_state
ff347533 JM	143	#ifdef __PIC__
ff347533 JM	144	PTR_LA t9, JUMPTARGET (__syscall_error)
aea7a9b9	145	RESTORE_GP64_STACK
ff347533	146	PTR_ADDIU sp, FRAMESZ
aea7a9b9	147	cfi_adjust_cfa_offset (-FRAMESZ)
ff347533 JM	148	jr t9
	149
	150	#else /* ! __PIC__ */
	151
	152	j JUMPTARGET (__syscall_error)
	153	#endif /* ! __PIC__ */
	154	PSEUDO_END (__getcontext)
	155
	156	weak_alias (__getcontext, getcontext)