minix/lib/libc/arch/mips/gen/_setjmp.S
Ben Gras 2fe8fb192f Full switch to clang/ELF. Drop ack. Simplify.
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
2012-02-14 14:52:02 +01:00

188 lines
6.1 KiB
ArmAsm

/* $NetBSD: _setjmp.S,v 1.22 2010/09/03 17:22:51 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 <machine/cdefs.h>
#include <mips/regnum.h>
#include <mips/asm.h>
#include <machine/setjmp.h>
#include <machine/signal.h> /* XXX */
#include "assym.h"
#include "SYS.h"
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
RCSID("from: @(#)_setjmp.s 8.1 (Berkeley) 6/4/93")
#else
RCSID("$NetBSD: _setjmp.S,v 1.22 2010/09/03 17:22:51 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,
* The previous signal state is NOT restored.
*/
.set noreorder
LEAF(_setjmp)
REG_PROLOGUE
REG_LI v0, 0xACEDBADE # sigcontext magic number
REG_S ra, _OFFSETOF_SC_PC(a0) # sc_pc = return address
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 sp, _OFFSETOF_SC_REGS_SP(a0)
REG_S s8, _OFFSETOF_SC_REGS_S8(a0)
#if defined(__mips_n32) || defined(__mips_n64)
REG_S gp, _OFFSETOF_SC_REGS_GP(a0) # newabi gp is callee-saved
#endif
/*
* In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved.
* In N64, FP registers F23 .. F31 are callee-saved.
* In O32, FP registers F20 .. F23 are callee-saved.
*/
#ifndef SOFTFLOAT_FOR_GCC
cfc1 v0, $31 # too bad cant check if FP used
INT_S v0, _OFFSETOF_SC_FPREGS_FCSR(a0)
#if defined(__mips_n64) || defined(__mips_n32)
FP_S $f30, _OFFSETOF_SC_FPREGS_F30(a0)
FP_S $f28, _OFFSETOF_SC_FPREGS_F28(a0)
FP_S $f26, _OFFSETOF_SC_FPREGS_F26(a0)
FP_S $f24, _OFFSETOF_SC_FPREGS_F24(a0)
#endif
#if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64)
FP_S $f22, _OFFSETOF_SC_FPREGS_F22(a0)
FP_S $f20, _OFFSETOF_SC_FPREGS_F20(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_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
#endif /* SOFTFLOAT_FOR_GCC */
REG_EPILOGUE
j ra
move v0, zero
END(_setjmp)
LEAF(_longjmp)
PIC_PROLOGUE(_longjmp)
PTR_SUBU sp, sp, CALLFRAME_SIZ
SAVE_GP(CALLFRAME_GP)
REG_PROLOGUE
REG_L v0, _OFFSETOF_SC_REGS(a0) # get magic number
REG_L ra, _OFFSETOF_SC_PC(a0)
REG_LI t0, 0xACEDBADE
bne v0, t0, botch # jump if error
PTR_ADDU sp, sp, CALLFRAME_SIZ # does not matter, sanity
REG_S a1, _OFFSETOF_SC_REGS_V0(a0) # save return value
REG_L s0, _OFFSETOF_SC_REGS_S0(a0)
REG_L s1, _OFFSETOF_SC_REGS_S1(a0)
REG_L s2, _OFFSETOF_SC_REGS_S2(a0)
REG_L s3, _OFFSETOF_SC_REGS_S3(a0)
REG_L s4, _OFFSETOF_SC_REGS_S4(a0)
REG_L s5, _OFFSETOF_SC_REGS_S5(a0)
REG_L s6, _OFFSETOF_SC_REGS_S6(a0)
REG_L s7, _OFFSETOF_SC_REGS_S7(a0)
#if defined(__mips_n32) || defined(__mips_n64)
REG_L gp, _OFFSETOF_SC_REGS_GP(a0)
#endif
# get fpu status
REG_L sp, _OFFSETOF_SC_REGS_SP(a0)
REG_L s8, _OFFSETOF_SC_REGS_S8(a0)
#ifndef SOFTFLOAT_FOR_GCC
INT_L v0, _OFFSETOF_SC_FPREGS_FCSR(a0)
ctc1 v0, $31
/*
* In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved.
* In N64, FP registers F23 .. F31 are callee-saved.
* In O32, FP registers F20 .. F23 are callee-saved.
*/
#if defined(__mips_n64) || defined(__mips_n32)
FP_L $f30, _OFFSETOF_SC_FPREGS_F30(a0)
FP_L $f28, _OFFSETOF_SC_FPREGS_F28(a0)
FP_L $f26, _OFFSETOF_SC_FPREGS_F26(a0)
FP_L $f24, _OFFSETOF_SC_FPREGS_F24(a0)
#endif
#if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64)
FP_L $f22, _OFFSETOF_SC_FPREGS_F22(a0)
FP_L $f20, _OFFSETOF_SC_FPREGS_F20(a0)
#endif
#if defined(__mips_o32) || defined(__mips_o64)
FP_L $f21, _OFFSETOF_SC_FPREGS_F21(a0)
FP_L $f23, _OFFSETOF_SC_FPREGS_F23(a0)
#endif
#if defined(__mips_n64)
FP_L $f25, _OFFSETOF_SC_FPREGS_F25(a0)
FP_L $f27, _OFFSETOF_SC_FPREGS_F27(a0)
FP_L $f29, _OFFSETOF_SC_FPREGS_F29(a0)
FP_L $f31, _OFFSETOF_SC_FPREGS_F31(a0)
#endif
#endif /* SOFTFLOAT_FOR_GCC */
REG_EPILOGUE
move v0, a1 # get return value in 1st arg
j ra
nop
botch:
/*
* We know we aren't returning so we don't care about restoring
* our caller's GP.
*/
jal _C_LABEL(longjmperror)
PIC_TAILCALL(abort)
END(_longjmp)