--- /dev/null
+/* $OpenBSD: db_magic.s,v 1.1 1996/05/04 14:33:00 mickey Exp $ */
+
+/*
+ * Mach Operating System
+ * Copyright (c) 1995 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
+ * School of Computer Science
+ * Carnegie Mellon University
+ * Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+
+#include <machine/asm.h>
+#define S_ARG0 4(%esp)
+#define S_ARG1 8(%esp)
+#define S_ARG2 12(%esp)
+#define S_ARG3 16(%esp)
+#define B_ARG0 8(%ebp)
+#define B_ARG1 12(%ebp)
+#define B_ARG2 16(%ebp)
+#define B_ARG3 20(%ebp)
+/*
+ * void outb(unsigned char *io_port,
+ * unsigned char byte)
+ *
+ * Output a byte to an IO port.
+ */
+ENTRY(outb)
+ movl S_ARG0,%edx /* IO port address */
+ movl S_ARG1,%eax /* data to output */
+ outb %al,%dx /* send it out */
+ ret
+/*
+ * unsigned char inb(unsigned char *io_port)
+ *
+ * Input a byte from an IO port.
+ */
+ENTRY(inb)
+ movl S_ARG0,%edx /* IO port address */
+ xor %eax,%eax /* clear high bits of register */
+ inb %dx,%al /* get the byte */
+ ret
+/*
+ * void outw(unsigned short *io_port,
+ * unsigned short word)
+ *
+ * Output a word to an IO port.
+ */
+ENTRY(outw)
+ movl S_ARG0,%edx /* IO port address */
+ movl S_ARG1,%eax /* data to output */
+ outw %ax,%dx /* send it out */
+ ret
+/*
+ * unsigned short inw(unsigned short *io_port)
+ *
+ * Input a word from an IO port.
+ */
+ENTRY(inw)
+ movl S_ARG0,%edx /* IO port address */
+ xor %eax,%eax /* clear high bits of register */
+ inw %dx,%ax /* get the word */
+ ret
+/*
+ * void outl(unsigned int *io_port,
+ * unsigned int byte)
+ *
+ * Output an int to an IO port.
+ */
+ENTRY(outl)
+ movl S_ARG0,%edx /* IO port address */
+ movl S_ARG1,%eax /* data to output */
+ outl %eax,%dx /* send it out */
+ ret
+/*
+ * unsigned int inl(unsigned int *io_port)
+ *
+ * Input an int from an IO port.
+ */
+ENTRY(inl)
+ movl S_ARG0,%edx /* IO port address */
+ inl %dx,%eax /* get the int */
+ ret
+ENTRY(dr6)
+ movl %db6, %eax
+ ret
+/* dr<i>(address, type, len, persistence)
+ * type:
+ * 00 execution (use len 00)
+ * 01 data write
+ * 11 data read/write
+ * len:
+ * 00 one byte
+ * 01 two bytes
+ * 11 four bytes
+ */
+ENTRY(dr0)
+ movl S_ARG0, %eax
+ movl %eax,_dr_addr
+ movl %eax, %db0
+ movl $0, %ecx
+ jmp 0f
+ENTRY(dr1)
+ movl S_ARG0, %eax
+ movl %eax,_dr_addr+1*4
+ movl %eax, %db1
+ movl $2, %ecx
+ jmp 0f
+ENTRY(dr2)
+ movl S_ARG0, %eax
+ movl %eax,_dr_addr+2*4
+ movl %eax, %db2
+ movl $4, %ecx
+ jmp 0f
+ENTRY(dr3)
+ movl S_ARG0, %eax
+ movl %eax,_dr_addr+3*4
+ movl %eax, %db3
+ movl $6, %ecx
+0:
+ pushl %ebp
+ movl %esp, %ebp
+ movl %db7, %edx
+ movl %edx,_dr_addr+4*4
+ andl dr_msk(,%ecx,2),%edx /* clear out new entry */
+ movl %edx,_dr_addr+5*4
+ movzbl B_ARG3, %eax
+ andb $3, %al
+ shll %cl, %eax
+ orl %eax, %edx
+ movzbl B_ARG1, %eax
+ andb $3, %al
+ addb $0x10, %ecx
+ shll %cl, %eax
+ orl %eax, %edx
+ movzbl B_ARG2, %eax
+ andb $3, %al
+ addb $0x2, %ecx
+ shll %cl, %eax
+ orl %eax, %edx
+ movl %edx, %db7
+ movl %edx,_dr_addr+7*4
+ movl %edx, %eax
+ leave
+ ret
+ .data
+dr_msk:
+ .long ~0x000f0003
+ .long ~0x00f0000c
+ .long ~0x0f000030
+ .long ~0xf00000c0
+ENTRY(dr_addr)
+ .long 0,0,0,0
+ .long 0,0,0,0
+ .text
+
projects / openbsd / commitdiff