WebSVN – HelenOS – Diff – /trunk/kernel/arch/amd64/src/debugger.c


/*
 * Copyright (c) 2006 Ondrej Palkovsky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */
 
/** @addtogroup amd64debug
 * @{
 */
/** @file
 */
 
#include <arch/debugger.h>
#include <console/kconsole.h>
#include <console/cmd.h>
#include <symtab.h>
#include <print.h>
#include <panic.h>
#include <interrupt.h>
#include <arch/asm.h>
#include <arch/cpu.h>
#include <debug.h>
#include <func.h>
#include <smp/ipi.h>
 
typedef struct  {
    uintptr_t address;      /**< Breakpoint address */
    int flags;              /**< Flags regarding breakpoint */
    int counter;            /**< How many times the exception occured */
} bpinfo_t;
 
static bpinfo_t breakpoints[BKPOINTS_MAX];
SPINLOCK_INITIALIZE(bkpoint_lock);
 
static int cmd_print_breakpoints(cmd_arg_t *argv);
static cmd_info_t bkpts_info = {
    .name = "bkpts",
    .description = "Print breakpoint table.",
    .func = cmd_print_breakpoints,
    .argc = 0,
};
 
#ifndef CONFIG_DEBUG_AS_WATCHPOINT
 
static int cmd_del_breakpoint(cmd_arg_t *argv);
static cmd_arg_t del_argv = {
    .type = ARG_TYPE_INT
};
static cmd_info_t delbkpt_info = {
    .name = "delbkpt",
    .description = "delbkpt <number> - Delete breakpoint.",
    .func = cmd_del_breakpoint,
    .argc = 1,
    .argv = &del_argv
};
 
static int cmd_add_breakpoint(cmd_arg_t *argv);
static cmd_arg_t add_argv = {
    .type = ARG_TYPE_INT
};
static cmd_info_t addbkpt_info = {
    .name = "addbkpt",
    .description = "addbkpt <&symbol> - new breakpoint.",
    .func = cmd_add_breakpoint,
    .argc = 1,
    .argv = &add_argv
};
 
static cmd_arg_t addw_argv = {
    .type = ARG_TYPE_INT
};
static cmd_info_t addwatchp_info = {
    .name = "addwatchp",
    .description = "addbwatchp <&symbol> - new write watchpoint.",
    .func = cmd_add_breakpoint,
    .argc = 1,
    .argv = &addw_argv
};
 
#endif
 
/** Print table of active breakpoints */
int cmd_print_breakpoints(cmd_arg_t *argv __attribute__((unused)))
{
    unsigned int i;
    char *symbol;
 
#ifdef __32_BITS__  
    printf("#  Count Address    In symbol\n");
    printf("-- ----- ---------- ---------\n");
#endif
 
#ifdef __64_BITS__
    printf("#  Count Address            In symbol\n");
    printf("-- ----- ------------------ ---------\n");
#endif
   
    for (i = 0; i < BKPOINTS_MAX; i++)
        if (breakpoints[i].address) {
            symbol = get_symtab_entry(breakpoints[i].address);
 
#ifdef __32_BITS__
            printf("%-2u %-5d %#10zx %s\n", i, breakpoints[i].counter,
                breakpoints[i].address, symbol);
#endif
 
#ifdef __64_BITS__
            printf("%-2u %-5d %#18zx %s\n", i, breakpoints[i].counter,
                breakpoints[i].address, symbol);
#endif
 
        }
    return 1;
}
 
/* Setup DR register according to table */
static void setup_dr(int curidx)
{
    unative_t dr7;
    bpinfo_t *cur = &breakpoints[curidx];
    int flags = breakpoints[curidx].flags;
 
    /* Disable breakpoint in DR7 */
    dr7 = read_dr7();
    dr7 &= ~(0x2 << (curidx*2));
 
    if (cur->address) { /* Setup DR register */
        /* Set breakpoint to debug registers */
        switch (curidx) {
        case 0:
            write_dr0(cur->address);
            break;
        case 1:
            write_dr1(cur->address);
            break;
        case 2:
            write_dr2(cur->address);
            break;
        case 3:
            write_dr3(cur->address);
            break;
        }
        /* Set type to requested breakpoint & length*/
        dr7 &= ~ (0x3 << (16 + 4*curidx));
        dr7 &= ~ (0x3 << (18 + 4*curidx));
        if ((flags & BKPOINT_INSTR)) {
            ;
        } else {
       
#ifdef __32_BITS__
            dr7 |= ((unative_t) 0x3) << (18 + 4 * curidx);
#endif
 
#ifdef __64_BITS__
            dr7 |= ((unative_t) 0x2) << (18 + 4 * curidx);
#endif
           
            if ((flags & BKPOINT_WRITE))
                dr7 |= ((unative_t) 0x1) << (16 + 4 * curidx);
            else if ((flags & BKPOINT_READ_WRITE))
                dr7 |= ((unative_t) 0x3) << (16 + 4 * curidx);
        }
 
        /* Enable global breakpoint */
        dr7 |= 0x2 << (curidx*2);
 
        write_dr7(dr7);
       
    }
}
   
/** Enable hardware breakpoint
 *
 * @param where Address of HW breakpoint
 * @param flags Type of breakpoint (EXECUTE, WRITE)
 * @return Debug slot on success, -1 - no available HW breakpoint
 */
int breakpoint_add(const void *where, const int flags, int curidx)
{
    ipl_t ipl;
    int i;
    bpinfo_t *cur;
 
    ASSERT(flags & (BKPOINT_INSTR | BKPOINT_WRITE | BKPOINT_READ_WRITE));
 
    ipl = interrupts_disable();
    spinlock_lock(&bkpoint_lock);
   
    if (curidx == -1) {
        /* Find free space in slots */
        for (i = 0; i < BKPOINTS_MAX; i++)
            if (!breakpoints[i].address) {
                curidx = i;
                break;
            }
        if (curidx == -1) {
            /* Too many breakpoints */
            spinlock_unlock(&bkpoint_lock);
            interrupts_restore(ipl);
            return -1;
        }
    }
    cur = &breakpoints[curidx];
 
    cur->address = (uintptr_t) where;
    cur->flags = flags;
    cur->counter = 0;
 
    setup_dr(curidx);
 
    spinlock_unlock(&bkpoint_lock);
    interrupts_restore(ipl);
 
    /* Send IPI */
#ifdef CONFIG_SMP
//  ipi_broadcast(VECTOR_DEBUG_IPI);    
#endif  
 
    return curidx;
}
 
#ifdef amd64
#   define getip(x) ((x)->rip)
#else
#   define getip(x) ((x)->eip)
#endif
 
static void handle_exception(int slot, istate_t *istate)
{
    ASSERT(breakpoints[slot].address);
 
    /* Handle zero checker */
    if (! (breakpoints[slot].flags & BKPOINT_INSTR)) {
        if ((breakpoints[slot].flags & BKPOINT_CHECK_ZERO)) {
            if (*((unative_t *) breakpoints[slot].address) != 0)
                return;
            printf("**** Found ZERO on address %lx (slot %d) ****\n",
                breakpoints[slot].address, slot);
        } else {
            printf("Data watchpoint - new data: %lx\n",
                   *((unative_t *) breakpoints[slot].address));
        }
    }
    printf("Reached breakpoint %d:%lx(%s)\n", slot, getip(istate),
           get_symtab_entry(getip(istate)));
    printf("***Type 'exit' to exit kconsole.\n");
    atomic_set(&haltstate,1);
    kconsole((void *) "debug");
    atomic_set(&haltstate,0);
}
 
void breakpoint_del(int slot)
{
    bpinfo_t *cur;
    ipl_t ipl;
 
    ipl = interrupts_disable();
    spinlock_lock(&bkpoint_lock);
 
    cur = &breakpoints[slot];
    if (!cur->address) {
        spinlock_unlock(&bkpoint_lock);
        interrupts_restore(ipl);
        return;
    }
 
    cur->address = NULL;
 
    setup_dr(slot);
 
    spinlock_unlock(&bkpoint_lock);
    interrupts_restore(ipl);
#ifdef CONFIG_SMP
//  ipi_broadcast(VECTOR_DEBUG_IPI);    
#endif
}
 
#ifndef CONFIG_DEBUG_AS_WATCHPOINT
 
/** Remove breakpoint from table */
int cmd_del_breakpoint(cmd_arg_t *argv)
{
    unative_t bpno = argv->intval;
    if (bpno > BKPOINTS_MAX) {
        printf("Invalid breakpoint number.\n");
        return 0;
    }
    breakpoint_del(argv->intval);
    return 1;
}
 
/** Add new breakpoint to table */
static int cmd_add_breakpoint(cmd_arg_t *argv)
{
    int flags;
    int id;
 
    if (argv == &add_argv) {
        flags = BKPOINT_INSTR;
    } else { /* addwatchp */
        flags = BKPOINT_WRITE;
    }
    printf("Adding breakpoint on address: %p\n", argv->intval);
    id = breakpoint_add((void *)argv->intval, flags, -1);
    if (id < 0)
        printf("Add breakpoint failed.\n");
    else
        printf("Added breakpoint %d.\n", id);
   
    return 1;
}
#endif
 
static void debug_exception(int n __attribute__((unused)), istate_t *istate)
{
    unative_t dr6;
    int i;
   
    /* Set RF to restart the instruction  */
#ifdef amd64       
    istate->rflags |= RFLAGS_RF;
#else
    istate->eflags |= EFLAGS_RF;
#endif
 
    dr6 = read_dr6();
    for (i=0; i < BKPOINTS_MAX; i++) {
        if (dr6 & (1 << i)) {
            dr6 &= ~ (1 << i);
            write_dr6(dr6);
           
            handle_exception(i, istate);
        }
    }
}
 
#ifdef CONFIG_SMP
static void debug_ipi(int n __attribute__((unused)), istate_t *istate __attribute__((unused)))
{
    int i;
 
    spinlock_lock(&bkpoint_lock);
    for (i = 0; i < BKPOINTS_MAX; i++)
        setup_dr(i);
    spinlock_unlock(&bkpoint_lock);
}
#endif
 
/** Initialize debugger */
void debugger_init()
{
    int i;
 
    for (i=0; i<BKPOINTS_MAX; i++)
        breakpoints[i].address = NULL;
   
    cmd_initialize(&bkpts_info);
    if (!cmd_register(&bkpts_info))
        panic("could not register command %s\n", bkpts_info.name);
 
#ifndef CONFIG_DEBUG_AS_WATCHPOINT
    cmd_initialize(&delbkpt_info);
    if (!cmd_register(&delbkpt_info))
        panic("could not register command %s\n", delbkpt_info.name);
 
    cmd_initialize(&addbkpt_info);
    if (!cmd_register(&addbkpt_info))
        panic("could not register command %s\n", addbkpt_info.name);
 
    cmd_initialize(&addwatchp_info);
    if (!cmd_register(&addwatchp_info))
        panic("could not register command %s\n", addwatchp_info.name);
#endif
   
    exc_register(VECTOR_DEBUG, "debugger",
             debug_exception);
#ifdef CONFIG_SMP
    exc_register(VECTOR_DEBUG_IPI, "debugger_smp",
             debug_ipi);
#endif
}
 
/** @}
 */
 

Rev 2767	Rev 3071
1	/*	1	/*
2	* Copyright (c) 2006 Ondrej Palkovsky	2	* Copyright (c) 2006 Ondrej Palkovsky
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup amd64debug	29	/** @addtogroup amd64debug
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <arch/debugger.h>	35	#include <arch/debugger.h>
36	#include <console/kconsole.h>	36	#include <console/kconsole.h>
37	#include <console/cmd.h>	37	#include <console/cmd.h>
38	#include <symtab.h>	38	#include <symtab.h>
39	#include <print.h>	39	#include <print.h>
40	#include <panic.h>	40	#include <panic.h>
41	#include <interrupt.h>	41	#include <interrupt.h>
42	#include <arch/asm.h>	42	#include <arch/asm.h>
43	#include <arch/cpu.h>	43	#include <arch/cpu.h>
44	#include <debug.h>	44	#include <debug.h>
45	#include <func.h>	45	#include <func.h>
46	#include <smp/ipi.h>	46	#include <smp/ipi.h>
47		47
48	typedef struct {	48	typedef struct {
49	uintptr_t address; /*< Breakpoint address /	49	uintptr_t address; /*< Breakpoint address /
50	int flags; /*< Flags regarding breakpoint /	50	int flags; /*< Flags regarding breakpoint /
51	int counter; /*< How many times the exception occured /	51	int counter; /*< How many times the exception occured /
52	} bpinfo_t;	52	} bpinfo_t;
53		53
54	static bpinfo_t breakpoints[BKPOINTS_MAX];	54	static bpinfo_t breakpoints[BKPOINTS_MAX];
55	SPINLOCK_INITIALIZE(bkpoint_lock);	55	SPINLOCK_INITIALIZE(bkpoint_lock);
56		56
57	static int cmd_print_breakpoints(cmd_arg_t *argv);	57	static int cmd_print_breakpoints(cmd_arg_t *argv);
58	static cmd_info_t bkpts_info = {	58	static cmd_info_t bkpts_info = {
59	.name = "bkpts",	59	.name = "bkpts",
60	.description = "Print breakpoint table.",	60	.description = "Print breakpoint table.",
61	.func = cmd_print_breakpoints,	61	.func = cmd_print_breakpoints,
62	.argc = 0,	62	.argc = 0,
63	};	63	};
64		64
65	#ifndef CONFIG_DEBUG_AS_WATCHPOINT	65	#ifndef CONFIG_DEBUG_AS_WATCHPOINT
66		66
67	static int cmd_del_breakpoint(cmd_arg_t *argv);	67	static int cmd_del_breakpoint(cmd_arg_t *argv);
68	static cmd_arg_t del_argv = {	68	static cmd_arg_t del_argv = {
69	.type = ARG_TYPE_INT	69	.type = ARG_TYPE_INT
70	};	70	};
71	static cmd_info_t delbkpt_info = {	71	static cmd_info_t delbkpt_info = {
72	.name = "delbkpt",	72	.name = "delbkpt",
73	.description = "delbkpt <number> - Delete breakpoint.",	73	.description = "delbkpt <number> - Delete breakpoint.",
74	.func = cmd_del_breakpoint,	74	.func = cmd_del_breakpoint,
75	.argc = 1,	75	.argc = 1,
76	.argv = &del_argv	76	.argv = &del_argv
77	};	77	};
78		78
79	static int cmd_add_breakpoint(cmd_arg_t *argv);	79	static int cmd_add_breakpoint(cmd_arg_t *argv);
80	static cmd_arg_t add_argv = {	80	static cmd_arg_t add_argv = {
81	.type = ARG_TYPE_INT	81	.type = ARG_TYPE_INT
82	};	82	};
83	static cmd_info_t addbkpt_info = {	83	static cmd_info_t addbkpt_info = {
84	.name = "addbkpt",	84	.name = "addbkpt",
85	.description = "addbkpt <&symbol> - new breakpoint.",	85	.description = "addbkpt <&symbol> - new breakpoint.",
86	.func = cmd_add_breakpoint,	86	.func = cmd_add_breakpoint,
87	.argc = 1,	87	.argc = 1,
88	.argv = &add_argv	88	.argv = &add_argv
89	};	89	};
90		90
91	static cmd_arg_t addw_argv = {	91	static cmd_arg_t addw_argv = {
92	.type = ARG_TYPE_INT	92	.type = ARG_TYPE_INT
93	};	93	};
94	static cmd_info_t addwatchp_info = {	94	static cmd_info_t addwatchp_info = {
95	.name = "addwatchp",	95	.name = "addwatchp",
96	.description = "addbwatchp <&symbol> - new write watchpoint.",	96	.description = "addbwatchp <&symbol> - new write watchpoint.",
97	.func = cmd_add_breakpoint,	97	.func = cmd_add_breakpoint,
98	.argc = 1,	98	.argc = 1,
99	.argv = &addw_argv	99	.argv = &addw_argv
100	};	100	};
101		101
102	#endif	102	#endif
103		103
104	/** Print table of active breakpoints */	104	/** Print table of active breakpoints */
105	int cmd_print_breakpoints(cmd_arg_t *argv __attribute__((unused)))	105	int cmd_print_breakpoints(cmd_arg_t *argv __attribute__((unused)))
106	{	106	{
107	unsigned int i;	107	unsigned int i;
108	char *symbol;	108	char *symbol;
109		109
110	if (sizeof(void *) == 4) {	110	#ifdef __32_BITS__
111	printf("# Count Address In symbol\n");	111	printf("# Count Address In symbol\n");
112	printf("-- ----- ---------- ---------\n");	112	printf("-- ----- ---------- ---------\n");
113	} else {	113	#endif
-		114
-		115	#ifdef __64_BITS__
114	printf("# Count Address In symbol\n");	116	printf("# Count Address In symbol\n");
115	printf("-- ----- ------------------ ---------\n");	117	printf("-- ----- ------------------ ---------\n");
116	}	118	#endif
117		119
118	for (i = 0; i < BKPOINTS_MAX; i++)	120	for (i = 0; i < BKPOINTS_MAX; i++)
119	if (breakpoints[i].address) {	121	if (breakpoints[i].address) {
120	symbol = get_symtab_entry(breakpoints[i].address);	122	symbol = get_symtab_entry(breakpoints[i].address);
121		123
122	if (sizeof(void *) == 4)	124	#ifdef __32_BITS__
123	printf("%-2u %-5d %#10zx %s\n", i, breakpoints[i].counter,	125	printf("%-2u %-5d %#10zx %s\n", i, breakpoints[i].counter,
124	breakpoints[i].address, symbol);	126	breakpoints[i].address, symbol);
125	else	127	#endif
-		128
-		129	#ifdef __64_BITS__
126	printf("%-2u %-5d %#18zx %s\n", i, breakpoints[i].counter,	130	printf("%-2u %-5d %#18zx %s\n", i, breakpoints[i].counter,
127	breakpoints[i].address, symbol);	131	breakpoints[i].address, symbol);
-		132	#endif
-		133
128	}	134	}
129	return 1;	135	return 1;
130	}	136	}
131		137
132	/* Setup DR register according to table */	138	/* Setup DR register according to table */
133	static void setup_dr(int curidx)	139	static void setup_dr(int curidx)
134	{	140	{
135	unative_t dr7;	141	unative_t dr7;
136	bpinfo_t *cur = &breakpoints[curidx];	142	bpinfo_t *cur = &breakpoints[curidx];
137	int flags = breakpoints[curidx].flags;	143	int flags = breakpoints[curidx].flags;
138		144
139	/* Disable breakpoint in DR7 */	145	/* Disable breakpoint in DR7 */
140	dr7 = read_dr7();	146	dr7 = read_dr7();
141	dr7 &= ~(0x2 << (curidx*2));	147	dr7 &= ~(0x2 << (curidx*2));
142		148
143	if (cur->address) { /* Setup DR register */	149	if (cur->address) { /* Setup DR register */
144	/* Set breakpoint to debug registers */	150	/* Set breakpoint to debug registers */
145	switch (curidx) {	151	switch (curidx) {
146	case 0:	152	case 0:
147	write_dr0(cur->address);	153	write_dr0(cur->address);
148	break;	154	break;
149	case 1:	155	case 1:
150	write_dr1(cur->address);	156	write_dr1(cur->address);
151	break;	157	break;
152	case 2:	158	case 2:
153	write_dr2(cur->address);	159	write_dr2(cur->address);
154	break;	160	break;
155	case 3:	161	case 3:
156	write_dr3(cur->address);	162	write_dr3(cur->address);
157	break;	163	break;
158	}	164	}
159	/* Set type to requested breakpoint & length*/	165	/* Set type to requested breakpoint & length*/
160	dr7 &= ~ (0x3 << (16 + 4*curidx));	166	dr7 &= ~ (0x3 << (16 + 4*curidx));
161	dr7 &= ~ (0x3 << (18 + 4*curidx));	167	dr7 &= ~ (0x3 << (18 + 4*curidx));
162	if ((flags & BKPOINT_INSTR)) {	168	if ((flags & BKPOINT_INSTR)) {
163	;	169	;
164	} else {	170	} else {
-		171
165	if (sizeof(int) == 4)	172	#ifdef __32_BITS__
166	dr7 \|= ((unative_t) 0x3) << (18 + 4*curidx);	173	dr7 \|= ((unative_t) 0x3) << (18 + 4 * curidx);
-		174	#endif
-		175
167	else /* 8 */	176	#ifdef __64_BITS__
168	dr7 \|= ((unative_t) 0x2) << (18 + 4*curidx);	177	dr7 \|= ((unative_t) 0x2) << (18 + 4 * curidx);
-		178	#endif
169		179
170	if ((flags & BKPOINT_WRITE))	180	if ((flags & BKPOINT_WRITE))
171	dr7 \|= ((unative_t) 0x1) << (16 + 4*curidx);	181	dr7 \|= ((unative_t) 0x1) << (16 + 4 * curidx);
172	else if ((flags & BKPOINT_READ_WRITE))	182	else if ((flags & BKPOINT_READ_WRITE))
173	dr7 \|= ((unative_t) 0x3) << (16 + 4*curidx);	183	dr7 \|= ((unative_t) 0x3) << (16 + 4 * curidx);
174	}	184	}
175		185
176	/* Enable global breakpoint */	186	/* Enable global breakpoint */
177	dr7 \|= 0x2 << (curidx*2);	187	dr7 \|= 0x2 << (curidx*2);
178		188
179	write_dr7(dr7);	189	write_dr7(dr7);
180		190
181	}	191	}
182	}	192	}
183		193
184	/** Enable hardware breakpoint	194	/** Enable hardware breakpoint
185	*	195	*
186	* @param where Address of HW breakpoint	196	* @param where Address of HW breakpoint
187	* @param flags Type of breakpoint (EXECUTE, WRITE)	197	* @param flags Type of breakpoint (EXECUTE, WRITE)
188	* @return Debug slot on success, -1 - no available HW breakpoint	198	* @return Debug slot on success, -1 - no available HW breakpoint
189	*/	199	*/
190	int breakpoint_add(const void *where, const int flags, int curidx)	200	int breakpoint_add(const void *where, const int flags, int curidx)
191	{	201	{
192	ipl_t ipl;	202	ipl_t ipl;
193	int i;	203	int i;
194	bpinfo_t *cur;	204	bpinfo_t *cur;
195		205
196	ASSERT(flags & (BKPOINT_INSTR \| BKPOINT_WRITE \| BKPOINT_READ_WRITE));	206	ASSERT(flags & (BKPOINT_INSTR \| BKPOINT_WRITE \| BKPOINT_READ_WRITE));
197		207
198	ipl = interrupts_disable();	208	ipl = interrupts_disable();
199	spinlock_lock(&bkpoint_lock);	209	spinlock_lock(&bkpoint_lock);
200		210
201	if (curidx == -1) {	211	if (curidx == -1) {
202	/* Find free space in slots */	212	/* Find free space in slots */
203	for (i = 0; i < BKPOINTS_MAX; i++)	213	for (i = 0; i < BKPOINTS_MAX; i++)
204	if (!breakpoints[i].address) {	214	if (!breakpoints[i].address) {
205	curidx = i;	215	curidx = i;
206	break;	216	break;
207	}	217	}
208	if (curidx == -1) {	218	if (curidx == -1) {
209	/* Too many breakpoints */	219	/* Too many breakpoints */
210	spinlock_unlock(&bkpoint_lock);	220	spinlock_unlock(&bkpoint_lock);
211	interrupts_restore(ipl);	221	interrupts_restore(ipl);
212	return -1;	222	return -1;
213	}	223	}
214	}	224	}
215	cur = &breakpoints[curidx];	225	cur = &breakpoints[curidx];
216		226
217	cur->address = (uintptr_t) where;	227	cur->address = (uintptr_t) where;
218	cur->flags = flags;	228	cur->flags = flags;
219	cur->counter = 0;	229	cur->counter = 0;
220		230
221	setup_dr(curidx);	231	setup_dr(curidx);
222		232
223	spinlock_unlock(&bkpoint_lock);	233	spinlock_unlock(&bkpoint_lock);
224	interrupts_restore(ipl);	234	interrupts_restore(ipl);
225		235
226	/* Send IPI */	236	/* Send IPI */
227	#ifdef CONFIG_SMP	237	#ifdef CONFIG_SMP
228	// ipi_broadcast(VECTOR_DEBUG_IPI);	238	// ipi_broadcast(VECTOR_DEBUG_IPI);
229	#endif	239	#endif
230		240
231	return curidx;	241	return curidx;
232	}	242	}
233		243
234	#ifdef amd64	244	#ifdef amd64
235	# define getip(x) ((x)->rip)	245	# define getip(x) ((x)->rip)
236	#else	246	#else
237	# define getip(x) ((x)->eip)	247	# define getip(x) ((x)->eip)
238	#endif	248	#endif
239		249
240	static void handle_exception(int slot, istate_t *istate)	250	static void handle_exception(int slot, istate_t *istate)
241	{	251	{
242	ASSERT(breakpoints[slot].address);	252	ASSERT(breakpoints[slot].address);
243		253
244	/* Handle zero checker */	254	/* Handle zero checker */
245	if (! (breakpoints[slot].flags & BKPOINT_INSTR)) {	255	if (! (breakpoints[slot].flags & BKPOINT_INSTR)) {
246	if ((breakpoints[slot].flags & BKPOINT_CHECK_ZERO)) {	256	if ((breakpoints[slot].flags & BKPOINT_CHECK_ZERO)) {
247	if (((unative_t ) breakpoints[slot].address) != 0)	257	if (((unative_t ) breakpoints[slot].address) != 0)
248	return;	258	return;
249	printf("** Found ZERO on address %lx (slot %d) **\n",	259	printf("** Found ZERO on address %lx (slot %d) **\n",
250	breakpoints[slot].address, slot);	260	breakpoints[slot].address, slot);
251	} else {	261	} else {
252	printf("Data watchpoint - new data: %lx\n",	262	printf("Data watchpoint - new data: %lx\n",
253	((unative_t ) breakpoints[slot].address));	263	((unative_t ) breakpoints[slot].address));
254	}	264	}
255	}	265	}
256	printf("Reached breakpoint %d:%lx(%s)\n", slot, getip(istate),	266	printf("Reached breakpoint %d:%lx(%s)\n", slot, getip(istate),
257	get_symtab_entry(getip(istate)));	267	get_symtab_entry(getip(istate)));
258	printf("***Type 'exit' to exit kconsole.\n");	268	printf("***Type 'exit' to exit kconsole.\n");
259	atomic_set(&haltstate,1);	269	atomic_set(&haltstate,1);
260	kconsole((void *) "debug");	270	kconsole((void *) "debug");
261	atomic_set(&haltstate,0);	271	atomic_set(&haltstate,0);
262	}	272	}
263		273
264	void breakpoint_del(int slot)	274	void breakpoint_del(int slot)
265	{	275	{
266	bpinfo_t *cur;	276	bpinfo_t *cur;
267	ipl_t ipl;	277	ipl_t ipl;
268		278
269	ipl = interrupts_disable();	279	ipl = interrupts_disable();
270	spinlock_lock(&bkpoint_lock);	280	spinlock_lock(&bkpoint_lock);
271		281
272	cur = &breakpoints[slot];	282	cur = &breakpoints[slot];
273	if (!cur->address) {	283	if (!cur->address) {
274	spinlock_unlock(&bkpoint_lock);	284	spinlock_unlock(&bkpoint_lock);
275	interrupts_restore(ipl);	285	interrupts_restore(ipl);
276	return;	286	return;
277	}	287	}
278		288
279	cur->address = NULL;	289	cur->address = NULL;
280		290
281	setup_dr(slot);	291	setup_dr(slot);
282		292
283	spinlock_unlock(&bkpoint_lock);	293	spinlock_unlock(&bkpoint_lock);
284	interrupts_restore(ipl);	294	interrupts_restore(ipl);
285	#ifdef CONFIG_SMP	295	#ifdef CONFIG_SMP
286	// ipi_broadcast(VECTOR_DEBUG_IPI);	296	// ipi_broadcast(VECTOR_DEBUG_IPI);
287	#endif	297	#endif
288	}	298	}
289		299
290	#ifndef CONFIG_DEBUG_AS_WATCHPOINT	300	#ifndef CONFIG_DEBUG_AS_WATCHPOINT
291		301
292	/** Remove breakpoint from table */	302	/** Remove breakpoint from table */
293	int cmd_del_breakpoint(cmd_arg_t *argv)	303	int cmd_del_breakpoint(cmd_arg_t *argv)
294	{	304	{
295	unative_t bpno = argv->intval;	305	unative_t bpno = argv->intval;
296	if (bpno > BKPOINTS_MAX) {	306	if (bpno > BKPOINTS_MAX) {
297	printf("Invalid breakpoint number.\n");	307	printf("Invalid breakpoint number.\n");
298	return 0;	308	return 0;
299	}	309	}
300	breakpoint_del(argv->intval);	310	breakpoint_del(argv->intval);
301	return 1;	311	return 1;
302	}	312	}
303		313
304	/** Add new breakpoint to table */	314	/** Add new breakpoint to table */
305	static int cmd_add_breakpoint(cmd_arg_t *argv)	315	static int cmd_add_breakpoint(cmd_arg_t *argv)
306	{	316	{
307	int flags;	317	int flags;
308	int id;	318	int id;
309		319
310	if (argv == &add_argv) {	320	if (argv == &add_argv) {
311	flags = BKPOINT_INSTR;	321	flags = BKPOINT_INSTR;
312	} else { /* addwatchp */	322	} else { /* addwatchp */
313	flags = BKPOINT_WRITE;	323	flags = BKPOINT_WRITE;
314	}	324	}
315	printf("Adding breakpoint on address: %p\n", argv->intval);	325	printf("Adding breakpoint on address: %p\n", argv->intval);
316	id = breakpoint_add((void *)argv->intval, flags, -1);	326	id = breakpoint_add((void *)argv->intval, flags, -1);
317	if (id < 0)	327	if (id < 0)
318	printf("Add breakpoint failed.\n");	328	printf("Add breakpoint failed.\n");
319	else	329	else
320	printf("Added breakpoint %d.\n", id);	330	printf("Added breakpoint %d.\n", id);
321		331
322	return 1;	332	return 1;
323	}	333	}
324	#endif	334	#endif
325		335
326	static void debug_exception(int n __attribute__((unused)), istate_t *istate)	336	static void debug_exception(int n __attribute__((unused)), istate_t *istate)
327	{	337	{
328	unative_t dr6;	338	unative_t dr6;
329	int i;	339	int i;
330		340
331	/* Set RF to restart the instruction */	341	/* Set RF to restart the instruction */
332	#ifdef amd64	342	#ifdef amd64
333	istate->rflags \|= RFLAGS_RF;	343	istate->rflags \|= RFLAGS_RF;
334	#else	344	#else
335	istate->eflags \|= EFLAGS_RF;	345	istate->eflags \|= EFLAGS_RF;
336	#endif	346	#endif
337		347
338	dr6 = read_dr6();	348	dr6 = read_dr6();
339	for (i=0; i < BKPOINTS_MAX; i++) {	349	for (i=0; i < BKPOINTS_MAX; i++) {
340	if (dr6 & (1 << i)) {	350	if (dr6 & (1 << i)) {
341	dr6 &= ~ (1 << i);	351	dr6 &= ~ (1 << i);
342	write_dr6(dr6);	352	write_dr6(dr6);
343		353
344	handle_exception(i, istate);	354	handle_exception(i, istate);
345	}	355	}
346	}	356	}
347	}	357	}
348		358
349	#ifdef CONFIG_SMP	359	#ifdef CONFIG_SMP
350	static void debug_ipi(int n __attribute__((unused)), istate_t *istate __attribute__((unused)))	360	static void debug_ipi(int n __attribute__((unused)), istate_t *istate __attribute__((unused)))
351	{	361	{
352	int i;	362	int i;
353		363
354	spinlock_lock(&bkpoint_lock);	364	spinlock_lock(&bkpoint_lock);
355	for (i = 0; i < BKPOINTS_MAX; i++)	365	for (i = 0; i < BKPOINTS_MAX; i++)
356	setup_dr(i);	366	setup_dr(i);
357	spinlock_unlock(&bkpoint_lock);	367	spinlock_unlock(&bkpoint_lock);
358	}	368	}
359	#endif	369	#endif
360		370
361	/** Initialize debugger */	371	/** Initialize debugger */
362	void debugger_init()	372	void debugger_init()
363	{	373	{
364	int i;	374	int i;
365		375
366	for (i=0; i<BKPOINTS_MAX; i++)	376	for (i=0; i<BKPOINTS_MAX; i++)
367	breakpoints[i].address = NULL;	377	breakpoints[i].address = NULL;
368		378
369	cmd_initialize(&bkpts_info);	379	cmd_initialize(&bkpts_info);
370	if (!cmd_register(&bkpts_info))	380	if (!cmd_register(&bkpts_info))
371	panic("could not register command %s\n", bkpts_info.name);	381	panic("could not register command %s\n", bkpts_info.name);
372		382
373	#ifndef CONFIG_DEBUG_AS_WATCHPOINT	383	#ifndef CONFIG_DEBUG_AS_WATCHPOINT
374	cmd_initialize(&delbkpt_info);	384	cmd_initialize(&delbkpt_info);
375	if (!cmd_register(&delbkpt_info))	385	if (!cmd_register(&delbkpt_info))
376	panic("could not register command %s\n", delbkpt_info.name);	386	panic("could not register command %s\n", delbkpt_info.name);
377		387
378	cmd_initialize(&addbkpt_info);	388	cmd_initialize(&addbkpt_info);
379	if (!cmd_register(&addbkpt_info))	389	if (!cmd_register(&addbkpt_info))
380	panic("could not register command %s\n", addbkpt_info.name);	390	panic("could not register command %s\n", addbkpt_info.name);
381		391
382	cmd_initialize(&addwatchp_info);	392	cmd_initialize(&addwatchp_info);
383	if (!cmd_register(&addwatchp_info))	393	if (!cmd_register(&addwatchp_info))
384	panic("could not register command %s\n", addwatchp_info.name);	394	panic("could not register command %s\n", addwatchp_info.name);
385	#endif	395	#endif
386		396
387	exc_register(VECTOR_DEBUG, "debugger",	397	exc_register(VECTOR_DEBUG, "debugger",
388	debug_exception);	398	debug_exception);
389	#ifdef CONFIG_SMP	399	#ifdef CONFIG_SMP
390	exc_register(VECTOR_DEBUG_IPI, "debugger_smp",	400	exc_register(VECTOR_DEBUG_IPI, "debugger_smp",
391	debug_ipi);	401	debug_ipi);
392	#endif	402	#endif
393	}	403	}
394		404
395	/** @}	405	/** @}
396	*/	406	*/
397		407

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(root)/trunk/kernel/arch/amd64/src/debugger.c – Rev 2767 → 3071