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
134 lines
4.4 KiB
ArmAsm
134 lines
4.4 KiB
ArmAsm
/* $NetBSD: __sigtramp2.S,v 1.4 2009/11/03 05:07:25 snj Exp $ */
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/*
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* Copyright (c) 1998-2001 Michael Shalayeff
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Portitions of this file are derived from other sources, see
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* the copyrights and acknowledgements below.
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*/
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/*
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* Copyright (c) 1990,1991,1992,1994 The University of Utah and
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* the Computer Systems Laboratory (CSL). All rights reserved.
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*
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* THE UNIVERSITY OF UTAH AND CSL PROVIDE THIS SOFTWARE IN ITS "AS IS"
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* CONDITION, AND DISCLAIM ANY LIABILITY OF ANY KIND FOR ANY DAMAGES
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* WHATSOEVER RESULTING FROM ITS USE.
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*
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* CSL requests users of this software to return to csl-dist@cs.utah.edu any
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* improvements that they make and grant CSL redistribution rights.
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*
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* Utah $Hdr: locore.s 1.62 94/12/15$
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*/
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/*
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* (c) Copyright 1988 HEWLETT-PACKARD COMPANY
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*
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* To anyone who acknowledges that this file is provided "AS IS"
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* without any express or implied warranty:
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* permission to use, copy, modify, and distribute this file
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* for any purpose is hereby granted without fee, provided that
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* the above copyright notice and this notice appears in all
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* copies, and that the name of Hewlett-Packard Company not be
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* used in advertising or publicity pertaining to distribution
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* of the software without specific, written prior permission.
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* Hewlett-Packard Company makes no representations about the
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* suitability of this software for any purpose.
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*/
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#include "SYS.h"
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/*
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* The hppa signal trampoline is required to call the handler
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* possibily via a PLABEL.
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*
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* On entry, stack looks like:
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*
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* sp-> [x]
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* r3,arg2-> ucontext structure
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* arg1-> siginfo structure [0]
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*
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* where
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* x = HPPA_FRAME_ROUND(sizeof(sigframe_siginfo))
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*
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* and
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* struct sigframe_siginfo {
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* siginfo_t sf_si;
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* ucontext_t sf_uc;
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* };
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*/
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ENTRY_NOPROFILE(__sigtramp_siginfo_2, 0)
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.call
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/*
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* Our sendsig() places the address of the signal handler in %arg3.
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* It may actually be a PLABEL.
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*/
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bb,>=,n %arg3, 30, L$sigcode_bounce ; branch if not a PLABEL
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depi 0, 31, 2, %arg3 ; zero L bit in PLABEL pointer
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ldw 4(%arg3), %r19 ; load shared library linkage
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ldw 0(%arg3), %arg3 ; load real catcher address
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L$sigcode_bounce:
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/*
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* This blr puts the address of the following nop in rp.
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* It also schedules the nop for execution, which is why
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* that instruction has to be a nop, or, rather, not any
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* instruction only meant to execute once the signal handler
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* returns.
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*/
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blr %r0, %rp
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/*
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* This bv schedules the instruction pointed to by arg3
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* for execution. So, arg3 is the address of the signal
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* handler.
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*/
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bv,n %r0(%arg3)
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nop
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/*
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* The signal handler has returned. Since r3 is on the list
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* of callee-saved registers, it's whatever the sendsig
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* code wanted it set to. Since we copy it into arg0,
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* it looks like sendsig leaves r3 holding the desired
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* single argument to sys_setcontext, i.e., the ucontext_t *.
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*/
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/* Make a SYS_setcontext system call. */
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copy %r3, %arg0
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ldil L%SYSCALLGATE, %r1
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.call
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ble 4(%sr7, %r1)
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ldi SYS_setcontext, %t1
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/* Make a SYS_exit system call. */
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copy %ret0, %arg0
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ldil L%SYSCALLGATE, %r1
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.call
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ble 4(%sr7, %r1)
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ldi SYS_exit, %t1
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EXIT(__sigtramp_siginfo_2)
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