/*
 * Copyright (c) 1994 The University of Utah and
 * the Computer Systems Laboratory at the University of Utah (CSL).
 * All rights reserved.
 *
 * Permission to use, copy, modify and distribute this software is hereby
 * granted provided that (1) source code retains these copyright, permission,
 * and disclaimer notices, and (2) redistributions including binaries
 * reproduce the notices in supporting documentation, and (3) all advertising
 * materials mentioning features or use of this software display the following
 * acknowledgement: ``This product includes software developed by the
 * Computer Systems Laboratory at the University of Utah.''
 *
 * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
 * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * CSL requests users of this software to return to csl-dist@cs.utah.edu any
 * improvements that they make and grant CSL redistribution rights.
 *
 *      Author: Bryan Ford, University of Utah CSL
 */

#include <kern/printf.h>

#include "thread.h"
#include "trap.h"
#include "debug.h"

void dump_ss(const struct i386_saved_state *st)
{
	printf("Dump of i386_saved_state %p:\n", st);
	printf("EAX %08lx EBX %08lx ECX %08lx EDX %08lx\n",
		st->eax, st->ebx, st->ecx, st->edx);
	printf("ESI %08lx EDI %08lx EBP %08lx ESP %08lx\n",
		st->esi, st->edi, st->ebp, st->uesp);
	printf("CS %04lx SS %04lx "
		"DS %04lx ES %04lx "
		"FS %04lx GS %04lx\n",
		st->cs & 0xffff, st->ss & 0xffff,
		st->ds & 0xffff, st->es & 0xffff,
		st->fs & 0xffff, st->gs & 0xffff);
	printf("v86:            DS %04lx ES %04lx FS %04lx GS %04lx\n",
		st->v86_segs.v86_ds & 0xffff, st->v86_segs.v86_es & 0xffff,
		st->v86_segs.v86_gs & 0xffff, st->v86_segs.v86_gs & 0xffff);
	printf("EIP %08lx EFLAGS %08lx\n", st->eip, st->efl);
	printf("trapno %ld: %s, error %08lx\n",
		st->trapno, trap_name(st->trapno),
		st->err);
}

#ifdef DEBUG

struct debug_trace_entry
{
	char *filename;
	int linenum;
};
struct debug_trace_entry debug_trace_buf[DEBUG_TRACE_LEN];
int debug_trace_pos;

void
debug_trace_reset(void)
{
	int s = splhigh();
	debug_trace_pos = 0;
	debug_trace_buf[DEBUG_TRACE_LEN-1].filename = 0;
	splx(s);
}

static void
print_entry(int i, int *col)
{
	char *fn, *p;

	/* Strip off the path from the filename.  */
	fn = debug_trace_buf[i].filename;
	for (p = fn; *p; p++)
		if (*p == '/')
			fn = p+1;

	printf(" %9s:%-4d", fn, debug_trace_buf[i].linenum);
	if (++*col == 5)
	{
		printf("\n");
		*col = 0;
	}
}

void
debug_trace_dump(void)
{
	int s = splhigh();
	int i;
	int col = 0;

	printf("Debug trace dump ");

	/* If the last entry is nonzero,
	   the trace probably wrapped around.
	   Print out all the entries after the current position
	   before all the entries before it,
	   so we get a total of DEBUG_TRACE_LEN entries
	   in correct time order.  */
	if (debug_trace_buf[DEBUG_TRACE_LEN-1].filename != 0)
	{
		printf("(full):\n");

		for (i = debug_trace_pos; i < DEBUG_TRACE_LEN; i++)
		{
			print_entry(i, &col);
		}
	}
	else
		printf("(%d entries):\n", debug_trace_pos);

	/* Print the entries before the current position.  */
	for (i = 0; i < debug_trace_pos; i++)
	{
		print_entry(i, &col);
	}

	if (col != 0)
		printf("\n");

	debug_trace_reset();

	splx(s);
}

#include <kern/syscall_sw.h>

int syscall_trace = 0;
task_t syscall_trace_task;

int
syscall_trace_print(int syscallvec, ...)
{
	int syscallnum = syscallvec >> 4;
	int i;
	const mach_trap_t *trap = &mach_trap_table[syscallnum];

	if (syscall_trace_task && syscall_trace_task != current_task())
		goto out;

	printf("0x%08x:0x%08x:%s(",
	       current_task(), current_thread(), trap->mach_trap_name);
	for (i = 0; i < trap->mach_trap_arg_count; i++) {
		unsigned long value = (&syscallvec)[1+i];
		/* Use a crude heuristic to format pointers.  */
		if (value > 1024)
			printf("0x%08x", value);
		else
			printf("%d", value);

		if (i + 1 < trap->mach_trap_arg_count)
			printf(", ");
	}
	printf(")\n");

 out:
	return syscallvec;
}

#endif /* DEBUG */