2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
149 lines
4.9 KiB
ArmAsm
149 lines
4.9 KiB
ArmAsm
/* $NetBSD: setjmp.S,v 1.19 2010/09/03 17:22:51 matt Exp $ */
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/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/syscall.h>
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#include <mips/asm.h>
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#include "assym.h"
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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RCSID("from: @(#)setjmp.s 8.1 (Berkeley) 6/4/93")
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#else
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RCSID("$NetBSD: setjmp.S,v 1.19 2010/09/03 17:22:51 matt Exp $")
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#endif
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#endif /* LIBC_SCCS and not lint */
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/*
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* C library -- setjmp, longjmp
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*
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* longjmp(a,v)
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* will generate a "return(v)" from
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* the last call to
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* setjmp(a)
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* by restoring registers from the stack,
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* and a struct sigcontext, see <signal.h>
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*/
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#define SETJMP_FRAME_SIZE (CALLFRAME_SIZ + STACK_T_SIZE)
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NON_LEAF(__setjmp14, SETJMP_FRAME_SIZE, ra)
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.mask 0x80010000, (CALLFRAME_RA - CALLFRAME_SIZ)
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SETUP_GP
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PTR_SUBU sp, sp, SETJMP_FRAME_SIZE # allocate stack frame
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SAVE_GP(CALLFRAME_GP)
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SETUP_GP64(CALLFRAME_GP, __setjmp14)
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REG_S ra, CALLFRAME_RA(sp) # save RA
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REG_S s0, CALLFRAME_S0(sp) # save S0
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move s0, a0 # save sigcontext
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/* Get the signal mask. */
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PTR_ADDU a2, a0, _OFFSETOF_SC_MASK # &sc.sc_mask
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move a1, zero
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jal _C_LABEL(__sigprocmask14) # get current signal mask
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/* Get the signal stack. */
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move a0, zero
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PTR_ADDU a1, sp, CALLFRAME_SIZ # pointer to stack_t
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jal _C_LABEL(__sigaltstack14)
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move a0, s0 # restore jmpbuf
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INT_L v1, CALLFRAME_SIZ+_OFFSETOF_STACK_T_FLAGS(sp)
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# get old ss_onstack
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and v1, v1, SS_ONSTACK # extract onstack flag
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INT_S v1, _OFFSETOF_SC_ONSTACK(a0) # save it in sc_onstack
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REG_L s0, CALLFRAME_S0(sp) # restore S0
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REG_L ra, CALLFRAME_RA(sp) # restore RA
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blt v0, zero, botch # check for sigaltstack() error
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nop
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/*
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* We know we won't need this routine's GP anymore.
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*/
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RESTORE_GP64
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PTR_ADDU sp, sp, SETJMP_FRAME_SIZE # pop stack frame
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REG_PROLOGUE
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REG_S ra, _OFFSETOF_SC_PC(a0) # sc_pc = return address
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REG_LI v0, 0xACEDBADE # sigcontext magic number
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REG_S v0, _OFFSETOF_SC_REGS(a0) # saved in sc_regs[0]
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REG_S s0, _OFFSETOF_SC_REGS_S0(a0)
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REG_S s1, _OFFSETOF_SC_REGS_S1(a0)
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REG_S s2, _OFFSETOF_SC_REGS_S2(a0)
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REG_S s3, _OFFSETOF_SC_REGS_S3(a0)
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REG_S s4, _OFFSETOF_SC_REGS_S4(a0)
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REG_S s5, _OFFSETOF_SC_REGS_S5(a0)
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REG_S s6, _OFFSETOF_SC_REGS_S6(a0)
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REG_S s7, _OFFSETOF_SC_REGS_S7(a0)
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REG_S gp, _OFFSETOF_SC_REGS_GP(a0)
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REG_S sp, _OFFSETOF_SC_REGS_SP(a0)
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REG_S s8, _OFFSETOF_SC_REGS_S8(a0)
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#ifdef SOFTFLOAT_FOR_GCC
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INT_S zero, _OFFSETOF_SC_FPUSED(a0) # sc_fpused = 0
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#else
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li v0, 1 # be nice if we could tell
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INT_S v0, _OFFSETOF_SC_FPUSED(a0) # sc_fpused = 1
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cfc1 v0, $31
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INT_S v0, _OFFSETOF_SC_FPREGS_FCSR(a0)
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#if defined(__mips_o32) || defined(__mips_o64) || defined(__mips_n32)
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FP_S $f20, _OFFSETOF_SC_FPREGS_F20(a0)
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FP_S $f22, _OFFSETOF_SC_FPREGS_F22(a0)
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#endif
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#if defined(__mips_o32) || defined(__mips_o64)
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FP_S $f21, _OFFSETOF_SC_FPREGS_F21(a0)
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FP_S $f23, _OFFSETOF_SC_FPREGS_F23(a0)
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#endif
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#if defined(__mips_n32) || defined(__mips_n64)
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FP_S $f24, _OFFSETOF_SC_FPREGS_F24(a0)
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FP_S $f26, _OFFSETOF_SC_FPREGS_F26(a0)
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FP_S $f28, _OFFSETOF_SC_FPREGS_F28(a0)
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FP_S $f30, _OFFSETOF_SC_FPREGS_F30(a0)
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#endif
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#if defined(__mips_n64)
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FP_S $f25, _OFFSETOF_SC_FPREGS_F25(a0)
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FP_S $f27, _OFFSETOF_SC_FPREGS_F27(a0)
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FP_S $f29, _OFFSETOF_SC_FPREGS_F29(a0)
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FP_S $f31, _OFFSETOF_SC_FPREGS_F31(a0)
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#endif
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#endif /* SOFTFLOAT_FOR_GCC */
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REG_EPILOGUE
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move v0, zero
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j ra
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botch:
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jal _C_LABEL(abort)
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END(__setjmp14)
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