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-rw-r--r--lib/librthread/arch/amd64/_atomic_lock.c26
-rw-r--r--lib/librthread/arch/amd64/rfork_thread.S99
-rw-r--r--lib/librthread/arch/i386/_atomic_lock.c25
-rw-r--r--lib/librthread/arch/i386/rfork_thread.S126
4 files changed, 276 insertions, 0 deletions
diff --git a/lib/librthread/arch/amd64/_atomic_lock.c b/lib/librthread/arch/amd64/_atomic_lock.c
new file mode 100644
index 00000000000..14569edc562
--- /dev/null
+++ b/lib/librthread/arch/amd64/_atomic_lock.c
@@ -0,0 +1,26 @@
+/* $OpenBSD: _atomic_lock.c,v 1.1 2005/12/03 18:16:19 tedu Exp $ */
+
+/* David Leonard, <d@csee.uq.edu.au>. Public domain. */
+
+/*
+ * Atomic lock for amd64 -- taken from i386 code.
+ */
+
+#include "spinlock.h"
+
+int
+_atomic_lock(volatile _spinlock_lock_t *lock)
+{
+ _spinlock_lock_t old;
+
+ /*
+ * Use the eXCHanGe instruction to swap the lock value with
+ * a local variable containing the locked state.
+ */
+ old = _SPINLOCK_LOCKED;
+ __asm__("xchg %0,%1"
+ : "=r" (old), "=m" (*lock)
+ : "0" (old), "1" (*lock));
+
+ return (old != _SPINLOCK_UNLOCKED);
+}
diff --git a/lib/librthread/arch/amd64/rfork_thread.S b/lib/librthread/arch/amd64/rfork_thread.S
new file mode 100644
index 00000000000..faec9b233c7
--- /dev/null
+++ b/lib/librthread/arch/amd64/rfork_thread.S
@@ -0,0 +1,99 @@
+/* $OpenBSD: rfork_thread.S,v 1.1 2005/12/03 18:16:19 tedu Exp $ */
+/*-
+ * Copyright (c) 2000 Peter Wemm <peter@FreeBSD.org>
+ * Copyright (c) 2003 Alan L. Cox <alc@cs.rice.edu>
+ * All rights reserved.
+ *
+ * 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 AUTHOR 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 AUTHOR 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/asm.h>
+#if 0
+__FBSDID("$FreeBSD: /repoman/r/ncvs/src/lib/libc/amd64/gen/rfork_thread.S,v 1.1 2003/10/13 20:32:33 alc Exp $");
+#endif
+
+/*
+ * With thanks to John Dyson for the original version of this.
+ */
+
+#include "../../../libc/arch/amd64/SYS.h"
+
+/*
+ * %edi %rsi %rdx %rcx
+ * rfork_thread(flags, stack_addr, start_fnc, start_arg);
+ *
+ * flags: Flags to rfork system call. See rfork(2).
+ * stack_addr: Top of stack for thread.
+ * start_fnc: Address of thread function to call in child.
+ * start_arg: Argument to pass to the thread function in child.
+ */
+
+ENTRY(rfork_thread)
+ pushq %rbx
+ pushq %r12
+ movq %rdx, %rbx
+ movq %rcx, %r12
+
+ /*
+ * Prepare and execute the thread creation syscall
+ */
+ movq $SYS_rfork, %rax
+ int $0x80
+ jb 2f
+
+ /*
+ * Check to see if we are in the parent or child
+ */
+ cmpl $0, %edx
+ jnz 1f
+ popq %r12
+ popq %rbx
+ ret
+
+ /*
+ * If we are in the child (new thread), then
+ * set-up the call to the internal subroutine. If it
+ * returns, then call __exit.
+ */
+1:
+ movq %rsi, %rsp
+ movq %r12, %rdi
+ call *%rbx
+ movl %eax, %edi
+
+ /*
+ * Exit system call
+ */
+#ifdef SYS_exit
+ movq $SYS_exit, %rax
+#else
+ movq $SYS_sys_exit, %rax
+#endif
+ int $0x80
+
+ /*
+ * Branch here if the thread creation fails:
+ */
+2:
+ popq %r12
+ popq %rbx
+ jmp CERROR
diff --git a/lib/librthread/arch/i386/_atomic_lock.c b/lib/librthread/arch/i386/_atomic_lock.c
new file mode 100644
index 00000000000..7b9b46a73c7
--- /dev/null
+++ b/lib/librthread/arch/i386/_atomic_lock.c
@@ -0,0 +1,25 @@
+/* $OpenBSD: _atomic_lock.c,v 1.1 2005/12/03 18:16:19 tedu Exp $ */
+/* David Leonard, <d@csee.uq.edu.au>. Public domain. */
+
+/*
+ * Atomic lock for i386
+ */
+
+#include <machine/spinlock.h>
+
+int
+_atomic_lock(register volatile _spinlock_lock_t *lock)
+{
+ register _spinlock_lock_t old;
+
+ /*
+ * Use the eXCHanGe instruction to swap the lock value with
+ * a local variable containing the locked state.
+ */
+ old = _SPINLOCK_LOCKED;
+ __asm__("xchg %0,%1"
+ : "=r" (old), "=m" (*lock)
+ : "0" (old), "1" (*lock));
+
+ return (old != _SPINLOCK_UNLOCKED);
+}
diff --git a/lib/librthread/arch/i386/rfork_thread.S b/lib/librthread/arch/i386/rfork_thread.S
new file mode 100644
index 00000000000..39e35ac67c2
--- /dev/null
+++ b/lib/librthread/arch/i386/rfork_thread.S
@@ -0,0 +1,126 @@
+/* $OpenBSD: rfork_thread.S,v 1.1 2005/12/03 18:16:19 tedu Exp $ */
+/*-
+ * Copyright (c) 2000 Peter Wemm <peter@FreeBSD.org>
+ * All rights reserved.
+ *
+ * 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 AUTHOR 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 AUTHOR 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/asm.h>
+#if 0
+__FBSDID("$FreeBSD: /repoman/r/ncvs/src/lib/libc/i386/gen/rfork_thread.S,v 1.5 2003/05/07 17:23:25 jhb Exp $");
+#endif
+
+/*
+ * With thanks to John Dyson for the original version of this.
+ */
+
+#include "../../../libc/arch/i386/SYS.h"
+
+/*
+ * 8 12 16 20
+ * rfork_thread(flags, stack_addr, start_fnc, start_arg);
+ *
+ * flags: Flags to rfork system call. See rfork(2).
+ * stack_addr: Top of stack for thread.
+ * start_fnc: Address of thread function to call in child.
+ * start_arg: Argument to pass to the thread function in child.
+ */
+
+ENTRY(rfork_thread)
+ pushl %ebp
+ movl %esp, %ebp
+ pushl %esi
+
+ /*
+ * Push thread info onto the new thread's stack
+ */
+ movl 12(%ebp), %esi # get stack addr
+
+ subl $4, %esi
+ movl 20(%ebp), %eax # get start argument
+ movl %eax, (%esi)
+
+ subl $4, %esi
+ movl 16(%ebp), %eax # get start thread address
+ movl %eax, (%esi)
+
+ /*
+ * Prepare and execute the thread creation syscall
+ */
+ pushl 8(%ebp)
+ pushl $0
+ movl $SYS_rfork, %eax
+ int $0x80
+#if 0
+ jb 2f
+#endif
+
+ /*
+ * Check to see if we are in the parent or child
+ */
+ cmpl $0, %edx
+ jnz 1f
+ addl $8, %esp
+ popl %esi
+ movl %ebp, %esp
+ popl %ebp
+ ret
+ .p2align 2
+
+ /*
+ * If we are in the child (new thread), then
+ * set-up the call to the internal subroutine. If it
+ * returns, then call __exit.
+ */
+1:
+ movl %esi,%esp
+ popl %eax
+ call *%eax
+ addl $4, %esp
+
+ /*
+ * Exit system call
+ */
+ pushl %eax
+ pushl $0
+#ifdef SYS_exit
+ movl $SYS_exit, %eax
+#else
+ movl $SYS_sys_exit, %eax
+#endif
+ int $0x80
+
+ /*
+ * Branch here if the thread creation fails:
+ */
+2:
+ addl $8, %esp
+ popl %esi
+ movl %ebp, %esp
+ popl %ebp
+#if 0
+ /* FreeBSD code. how to translate? */
+ PIC_PROLOGUE
+ jmp PIC_PLT(HIDENAME(cerror))
+#endif
+ jmp CERROR
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 02:19:45 +0000