mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-06 05:10:05 +00:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
118 lines
3.3 KiB
ArmAsm
118 lines
3.3 KiB
ArmAsm
/* Copyright (C) 1992, 1997 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Brendan Kehoe (brendan@cs.widener.edu).
|
|
Also hacked by Ian Lance Taylor (ian@airs.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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
/* This function saves all the registers, calls the
|
|
user function, and then executes a sigreturn system call. The
|
|
sigreturn call wants the address of a sigcontext structure. This
|
|
is all hideously system dependent and, for all intents and
|
|
purposes, undocumented.
|
|
|
|
When we enter here, a3 holds the user's signal handler. We are
|
|
supposed to fill in the context given in a2, and then pass it and
|
|
the first two arguments to the user's function. If the user's
|
|
function returns, we execute a sigreturn system call.
|
|
|
|
The sc_onstack, sc_mask and sc_pc elements of the context are
|
|
already set by the kernel. For some reason we don't have to save
|
|
the floating point state or the coprocessor state; the kernel may
|
|
have saved them for us, or it doesn't use them. */
|
|
|
|
.set noat
|
|
ENTRY (__handler)
|
|
#if 0
|
|
/* Store zero and the asm temp reg. */
|
|
sw $0, 12(a2)
|
|
sw AT, 16(a2)
|
|
|
|
/* Put v1 in sc_regs[3]. */
|
|
sw v1, 24(a2)
|
|
|
|
/* Save the caller saved registers in sc_regs[8..15]. */
|
|
sw t0, 44(a2)
|
|
sw t1, 48(a2)
|
|
sw t2, 52(a2)
|
|
sw t3, 56(a2)
|
|
sw t4, 60(a2)
|
|
sw t5, 64(a2)
|
|
sw t6, 68(a2)
|
|
sw t7, 72(a2)
|
|
|
|
/* Save the callee saved registers in sc_regs[16..23]. */
|
|
sw s0, 76(a2)
|
|
sw s1, 80(a2)
|
|
sw s2, 84(a2)
|
|
sw s3, 88(a2)
|
|
sw s4, 92(a2)
|
|
sw s5, 96(a2)
|
|
sw s6, 100(a2)
|
|
sw s7, 104(a2)
|
|
|
|
/* Save the code generator registers in sc_regs[24] & sc_regs[25]. */
|
|
sw t8, 108(a2)
|
|
sw t9, 112(a2)
|
|
|
|
/* Save the kernel temp regs in sc_regs[26] & sc_regs[27]. */
|
|
sw k0, 116(a2)
|
|
sw k1, 120(a2)
|
|
|
|
/* Save the global pointer in sc_regs[28]. */
|
|
sw gp, 124(a2)
|
|
|
|
/* ... and also the return address in sc_regs[31]. */
|
|
sw ra, 136(a2)
|
|
|
|
/* Note: we don't save the stack pointer in sc_regs[29];
|
|
instead, we use the one that was already there. */
|
|
#if 0
|
|
sw sp, 128(a2)
|
|
#endif
|
|
|
|
/* Save the floating pointer in sc_regs[30]. */
|
|
sw fp, 132(a2)
|
|
|
|
/* Save the mul/div stuff in sc_mdlo and sc_mdhi. */
|
|
mflo t0
|
|
sw t0, 140(a2)
|
|
mfhi t0
|
|
sw t0, 144(a2)
|
|
|
|
#endif
|
|
/* Move the stack up six. This will save the context. */
|
|
addu sp, sp, -24
|
|
sw a2, 16(sp)
|
|
|
|
/* Call their handler with the signal, code, and context; note
|
|
this will clobber the context. */
|
|
.set noreorder
|
|
jal ra, a3
|
|
nop
|
|
.set reorder
|
|
|
|
/* When we come back, restore the context and pass it right
|
|
on into sigreturn(). */
|
|
lw a0, 16(sp)
|
|
|
|
/* Do a sigreturn syscall; this doesn't return. */
|
|
li v0, SYS_sigreturn
|
|
syscall
|
|
nop
|