/* $NetBSD: _context_u.S,v 1.11 2008/04/28 20:23:02 martin Exp $ */ /*- * Copyright (c) 2001 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Nathan J. Williams. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. * * Adapted for x86_64 by fvdl@NetBSD.org */ #include <machine/asm.h> #include "assym.h" #define STUB(n) ENTRY(n); .hidden _C_LABEL(n) #define GETC \ movq (%rsp), %r11 ; \ movq %r11, (UC_REGS + _REG_RIP * 8)(%rdi) ; \ movq %rbx, (UC_REGS + _REG_RBX * 8)(%rdi) ; \ movq %rbp, (UC_REGS + _REG_RBP * 8)(%rdi) ; \ movq %r12, (UC_REGS + _REG_R12 * 8)(%rdi) ; \ movq %r13, (UC_REGS + _REG_R13 * 8)(%rdi) ; \ movq %r14, (UC_REGS + _REG_R14 * 8)(%rdi) ; \ movq %r15, (UC_REGS + _REG_R15 * 8)(%rdi) ; \ fxsave UC_FPREGS(%rdi) ; \ movl $(_UC_USER | _UC_CPU | _UC_FPU),UC_FLAGS(%rdi) #define lretqm(x) \ .byte 0x48 ; \ .byte 0xca ; \ .word x #define SETC \ movl UC_FLAGS(%rdi), %eax ; \ btl $_UC_USER_BIT, %eax ; \ jnc 1f ; \ fxrstor UC_FPREGS(%rdi) ; \ movq (UC_REGS + _REG_RBX * 8)(%rdi),%rbx ; \ movq (UC_REGS + _REG_RBP * 8)(%rdi),%rbp ; \ movq (UC_REGS + _REG_R12 * 8)(%rdi),%r12 ; \ movq (UC_REGS + _REG_R13 * 8)(%rdi),%r13 ; \ movq (UC_REGS + _REG_R14 * 8)(%rdi),%r14 ; \ movq (UC_REGS + _REG_R15 * 8)(%rdi),%r15 ; \ movq (UC_REGS + _REG_URSP * 8)(%rdi),%r11 ; \ movq (UC_REGS + _REG_RIP * 8)(%rdi),%rax ; \ leaq -8(%r11),%rsp ; \ movq %rax, (%rsp) ; \ ret ; \ 1: andl $_UC_FPU, %eax ; \ jz 2f ; \ fxrstor UC_FPREGS(%rdi) ; \ 2: xorq %rax,%rax ; \ movw (UC_REGS + _REG_GS * 8)(%rdi), %gs ; \ movw (UC_REGS + _REG_FS * 8)(%rdi), %fs ; \ movw (UC_REGS + _REG_ES * 8)(%rdi), %es ; \ movq (UC_REGS + _REG_URSP * 8)(%rdi), %r11 ; \ movq (UC_REGS + _REG_RBX * 8)(%rdi), %rbx ; \ movq (UC_REGS + _REG_RBP * 8)(%rdi), %rbp ; \ movq (UC_REGS + _REG_R12 * 8)(%rdi), %r12 ; \ movq (UC_REGS + _REG_R13 * 8)(%rdi), %r13 ; \ movq (UC_REGS + _REG_R14 * 8)(%rdi), %r14 ; \ movq (UC_REGS + _REG_R15 * 8)(%rdi), %r15 ; \ movq (UC_REGS + _REG_RBX * 8)(%rdi), %rbx ; \ movq (UC_REGS + _REG_R10 * 8)(%rdi), %r10 ; \ movq (UC_REGS + _REG_R9 * 8)(%rdi), %r9 ; \ movq (UC_REGS + _REG_R8 * 8)(%rdi), %r8 ; \ movq (UC_REGS + _REG_RCX * 8)(%rdi), %rcx ; \ movq (UC_REGS + _REG_RDX * 8)(%rdi), %rdx ; \ movq (UC_REGS + _REG_RSI * 8)(%rdi), %rsi ; \ movw (UC_REGS + _REG_CS * 8)(%rdi), %ax ; \ movq %rax, -128-8(%r11) ; \ movw (UC_REGS + _REG_DS * 8)(%rdi), %ax ; \ movq %rax, -128-32(%r11) ; \ movq (UC_REGS + _REG_RIP * 8)(%rdi), %rax ; \ movq %rax, -128-16(%r11) ; \ movq (UC_REGS + _REG_RAX * 8)(%rdi), %rax ; \ movq %rax, -128-24(%r11) ; \ movq (UC_REGS + _REG_R11 * 8)(%rdi), %rax ; \ movq %rax, -128-40(%r11) ; \ movq (UC_REGS + _REG_RFL * 8)(%rdi), %rax ; \ movq %rax, -128-48(%r11) ; \ ; \ movw (UC_REGS + _REG_SS * 8)(%rdi), %ss ; \ movq (UC_REGS + _REG_RDI)(%rdi), %rdi ; \ leaq -128-48(%r11), %rsp ; \ ; \ popfq ; \ popq %r11 ; \ popq %rax ; \ movl %eax,%ds ; \ popq %rax ; \ lretqm(128) STUB(_getcontext_u) GETC leaq 8(%rsp), %r11 movq %r11, (UC_REGS + _REG_URSP * 8)(%rdi) xorl %eax, %eax ret STUB(_setcontext_u) SETC STUB(_swapcontext_u) GETC leaq 8(%rsp),%rax movq %rax, (UC_REGS + _REG_URSP * 8)(%rdi) movq %rsi, %rdi SETC