diff options
Diffstat (limited to 'sysdeps/unix/bsd/ultrix4/mips/__handler.S')
| -rw-r--r-- | sysdeps/unix/bsd/ultrix4/mips/__handler.S | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/sysdeps/unix/bsd/ultrix4/mips/__handler.S b/sysdeps/unix/bsd/ultrix4/mips/__handler.S deleted file mode 100644 index 2b815c46dd..0000000000 --- a/sysdeps/unix/bsd/ultrix4/mips/__handler.S +++ /dev/null @@ -1,115 +0,0 @@ -/* Copyright (C) 1992, 1997 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Brendan Kehoe (brendan@zen.org). - 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) - /* 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) - - /* Move the stack up four. This will save the context. */ - addu sp, sp, -32 - 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. */ - la v0, __sigreturn - jal ra, v0 - .end __handler |