b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
163 lines
5.1 KiB
ArmAsm
163 lines
5.1 KiB
ArmAsm
/* $NetBSD: compat_setjmp.S,v 1.2 2009/12/14 03:04:33 matt Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Ralph Campbell.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/syscall.h>
|
|
#include <mips/asm.h>
|
|
|
|
#include "assym.h"
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
#if 0
|
|
RCSID("from: @(#)setjmp.s 8.1 (Berkeley) 6/4/93")
|
|
#else
|
|
RCSID("$NetBSD: compat_setjmp.S,v 1.2 2009/12/14 03:04:33 matt Exp $")
|
|
#endif
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
/*
|
|
* C library -- setjmp, longjmp
|
|
*
|
|
* longjmp(a,v)
|
|
* will generate a "return(v)" from
|
|
* the last call to
|
|
* setjmp(a)
|
|
* by restoring registers from the stack,
|
|
* and a struct sigcontext, see <signal.h>
|
|
*/
|
|
|
|
#define SETJMP_FRAME_SIZE (CALLFRAME_SIZ + STACK_T_SIZE)
|
|
|
|
NON_LEAF(setjmp, SETJMP_FRAME_SIZE, ra)
|
|
.mask 0x80010000, (CALLFRAME_RA - CALLFRAME_SIZ)
|
|
SETUP_GP
|
|
PTR_SUBU sp, sp, SETJMP_FRAME_SIZE # allocate stack frame
|
|
SAVE_GP(CALLFRAME_GP)
|
|
SETUP_GP64(CALLFRAME_GP, setjmp)
|
|
|
|
REG_S ra, CALLFRAME_RA(sp) # save RA
|
|
REG_S s0, CALLFRAME_S0(sp) # save S0
|
|
move s0, a0 # save sigcontext
|
|
|
|
/* Get the signal mask. */
|
|
move a0, zero # get current sigmask
|
|
jal _C_LABEL(sigblock)
|
|
nop
|
|
INT_S v0, _OFFSETOF_SC_MASK13(s0) # save sc_mask13
|
|
|
|
/* Get the signal stack. */
|
|
move a0, zero
|
|
PTR_ADDU a1, sp, CALLFRAME_SIZ # pointer to stack_t
|
|
jal _C_LABEL(__sigaltstack14)
|
|
|
|
move a0, s0 # restore jmpbuf
|
|
INT_L v1, CALLFRAME_SIZ+_OFFSETOF_STACK_T_FLAGS(sp)
|
|
# get old ss_onstack
|
|
and v1, v1, SS_ONSTACK # extract onstack flag
|
|
INT_S v1, _OFFSETOF_SC_ONSTACK(a0) # save it in sc_onstack
|
|
|
|
REG_L s0, CALLFRAME_S0(sp) # restore S0
|
|
REG_L ra, CALLFRAME_RA(sp) # restore RA
|
|
blt v0, zero, botch # check for sigaltstack() error
|
|
nop
|
|
/*
|
|
* We know we won't need this routine's GP anymore.
|
|
*/
|
|
RESTORE_GP64
|
|
PTR_ADDU sp, sp, SETJMP_FRAME_SIZE # pop stack frame
|
|
|
|
REG_PROLOGUE
|
|
REG_S ra, _OFFSETOF_SC_PC(a0) # sc_pc = return address
|
|
REG_LI v0, 0xACEDBADE # sigcontext magic number
|
|
REG_S v0, _OFFSETOF_SC_REGS(a0) # saved in sc_regs[0]
|
|
REG_S s0, _OFFSETOF_SC_REGS_S0(a0)
|
|
REG_S s1, _OFFSETOF_SC_REGS_S1(a0)
|
|
REG_S s2, _OFFSETOF_SC_REGS_S2(a0)
|
|
REG_S s3, _OFFSETOF_SC_REGS_S3(a0)
|
|
REG_S s4, _OFFSETOF_SC_REGS_S4(a0)
|
|
REG_S s5, _OFFSETOF_SC_REGS_S5(a0)
|
|
REG_S s6, _OFFSETOF_SC_REGS_S6(a0)
|
|
REG_S s7, _OFFSETOF_SC_REGS_S7(a0)
|
|
REG_S gp, _OFFSETOF_SC_REGS_GP(a0)
|
|
REG_S sp, _OFFSETOF_SC_REGS_SP(a0)
|
|
REG_S s8, _OFFSETOF_SC_REGS_S8(a0)
|
|
li v0, 1 # be nice if we could tell
|
|
INT_S v0, _OFFSETOF_SC_FPUSED(a0) # sc_fpused = 1
|
|
cfc1 v0, $31
|
|
INT_S v0, _OFFSETOF_SC_FPREGS_FCSR(a0)
|
|
#if defined(__mips_o32) || defined(__mips_o64) || defined(__mips_n32)
|
|
FP_S $f20, _OFFSETOF_SC_FPREGS_F20(a0)
|
|
FP_S $f22, _OFFSETOF_SC_FPREGS_F22(a0)
|
|
#endif
|
|
#if defined(__mips_o32) || defined(__mips_o64)
|
|
FP_S $f21, _OFFSETOF_SC_FPREGS_F21(a0)
|
|
FP_S $f23, _OFFSETOF_SC_FPREGS_F23(a0)
|
|
#endif
|
|
#if defined(__mips_n32) || defined(__mips_n64)
|
|
FP_S $f24, _OFFSETOF_SC_FPREGS_F24(a0)
|
|
FP_S $f26, _OFFSETOF_SC_FPREGS_F26(a0)
|
|
FP_S $f28, _OFFSETOF_SC_FPREGS_F28(a0)
|
|
FP_S $f30, _OFFSETOF_SC_FPREGS_F30(a0)
|
|
#endif
|
|
#if defined(__mips_n64)
|
|
FP_S $f25, _OFFSETOF_SC_FPREGS_F25(a0)
|
|
FP_S $f27, _OFFSETOF_SC_FPREGS_F27(a0)
|
|
FP_S $f29, _OFFSETOF_SC_FPREGS_F29(a0)
|
|
FP_S $f31, _OFFSETOF_SC_FPREGS_F31(a0)
|
|
#endif
|
|
REG_EPILOGUE
|
|
j ra
|
|
move v0, zero
|
|
|
|
botch:
|
|
jal _C_LABEL(abort)
|
|
END(setjmp)
|
|
|
|
LEAF(longjmp)
|
|
SETUP_GP
|
|
PTR_SUBU sp, sp, CALLFRAME_SIZ
|
|
SAVE_GP(CALLFRAME_S0)
|
|
SETUP_GP64(s0, longjmp)
|
|
|
|
REG_PROLOGUE
|
|
/* save return value in sc_regs[_R_V0] */
|
|
REG_S a1, _OFFSETOF_SC_REGS_V0(a0)
|
|
REG_EPILOGUE
|
|
|
|
li v0, SYS_compat_13_sigreturn13
|
|
syscall
|
|
|
|
jal _C_LABEL(longjmperror)
|
|
jal _C_LABEL(abort)
|
|
END(longjmp)
|