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 <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>
 
#ifdef CONFIG_SYMTAB
#include <symtab.h>
#endif
 
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);
 
#ifdef CONFIG_KCONSOLE
 
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,
};
 
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 /* CONFIG_KCONSOLE */
 
/* 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 __64_BITS__
    #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));
        }
    }
 
#ifdef CONFIG_SYMTAB
    printf("Reached breakpoint %d:%lx(%s)\n", slot, getip(istate),
        get_symtab_entry(getip(istate)));
#else
    printf("Reached breakpoint %d:%lx\n", slot, getip(istate));
#endif
 
#ifdef CONFIG_KCONSOLE
    atomic_set(&haltstate, 1);
    kconsole("debug", "Debug console ready.\n", false);
    atomic_set(&haltstate, 0);
#endif
}
 
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
}
 
 
 
static void debug_exception(int n __attribute__((unused)), istate_t *istate)
{
    unative_t dr6;
    int i;
   
    /* Set RF to restart the instruction  */
#ifdef __64_BITS__
    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;
 
#ifdef CONFIG_KCONSOLE
    cmd_initialize(&bkpts_info);
    if (!cmd_register(&bkpts_info))
        printf("Cannot register command %s\n", bkpts_info.name);
 
    cmd_initialize(&delbkpt_info);
    if (!cmd_register(&delbkpt_info))
        printf("Cannot register command %s\n", delbkpt_info.name);
 
    cmd_initialize(&addbkpt_info);
    if (!cmd_register(&addbkpt_info))
        printf("Cannot register command %s\n", addbkpt_info.name);
 
    cmd_initialize(&addwatchp_info);
    if (!cmd_register(&addwatchp_info))
        printf("Cannot register command %s\n", addwatchp_info.name);
#endif /* CONFIG_KCONSOLE */
   
    exc_register(VECTOR_DEBUG, "debugger", debug_exception);
#ifdef CONFIG_SMP
    exc_register(VECTOR_DEBUG_IPI, "debugger_smp", debug_ipi);
#endif
}
 
#ifdef CONFIG_KCONSOLE
/** 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) {
#ifdef CONFIG_SYMTAB
            symbol = get_symtab_entry(breakpoints[i].address);
#else
            symbol = "n/a";
#endif
 
#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;
}
 
/** 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 /* CONFIG_KCONSOLE */
 
/** @}
 */
 

Rev 4101	Rev 4132
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>	-
39	#include <print.h>	38	#include <print.h>
40	#include <panic.h>	39	#include <panic.h>
41	#include <interrupt.h>	40	#include <interrupt.h>
42	#include <arch/asm.h>	41	#include <arch/asm.h>
43	#include <arch/cpu.h>	42	#include <arch/cpu.h>
44	#include <debug.h>	43	#include <debug.h>
45	#include <func.h>	44	#include <func.h>
46	#include <smp/ipi.h>	45	#include <smp/ipi.h>
47		46
-		47	#ifdef CONFIG_SYMTAB
-		48	#include <symtab.h>
-		49	#endif
-		50
48	typedef struct {	51	typedef struct {
49	uintptr_t address; /*< Breakpoint address /	52	uintptr_t address; /*< Breakpoint address /
50	int flags; /*< Flags regarding breakpoint /	53	int flags; /*< Flags regarding breakpoint /
51	int counter; /*< How many times the exception occured /	54	int counter; /*< How many times the exception occured /
52	} bpinfo_t;	55	} bpinfo_t;
53		56
54	static bpinfo_t breakpoints[BKPOINTS_MAX];	57	static bpinfo_t breakpoints[BKPOINTS_MAX];
55	SPINLOCK_INITIALIZE(bkpoint_lock);	58	SPINLOCK_INITIALIZE(bkpoint_lock);
56		59
57	#ifdef CONFIG_KCONSOLE	60	#ifdef CONFIG_KCONSOLE
58		61
59	static int cmd_print_breakpoints(cmd_arg_t *argv);	62	static int cmd_print_breakpoints(cmd_arg_t *argv);
60	static cmd_info_t bkpts_info = {	63	static cmd_info_t bkpts_info = {
61	.name = "bkpts",	64	.name = "bkpts",
62	.description = "Print breakpoint table.",	65	.description = "Print breakpoint table.",
63	.func = cmd_print_breakpoints,	66	.func = cmd_print_breakpoints,
64	.argc = 0,	67	.argc = 0,
65	};	68	};
66		69
67	static int cmd_del_breakpoint(cmd_arg_t *argv);	70	static int cmd_del_breakpoint(cmd_arg_t *argv);
68	static cmd_arg_t del_argv = {	71	static cmd_arg_t del_argv = {
69	.type = ARG_TYPE_INT	72	.type = ARG_TYPE_INT
70	};	73	};
71	static cmd_info_t delbkpt_info = {	74	static cmd_info_t delbkpt_info = {
72	.name = "delbkpt",	75	.name = "delbkpt",
73	.description = "delbkpt <number> - Delete breakpoint.",	76	.description = "delbkpt <number> - Delete breakpoint.",
74	.func = cmd_del_breakpoint,	77	.func = cmd_del_breakpoint,
75	.argc = 1,	78	.argc = 1,
76	.argv = &del_argv	79	.argv = &del_argv
77	};	80	};
78		81
79	static int cmd_add_breakpoint(cmd_arg_t *argv);	82	static int cmd_add_breakpoint(cmd_arg_t *argv);
80	static cmd_arg_t add_argv = {	83	static cmd_arg_t add_argv = {
81	.type = ARG_TYPE_INT	84	.type = ARG_TYPE_INT
82	};	85	};
83	static cmd_info_t addbkpt_info = {	86	static cmd_info_t addbkpt_info = {
84	.name = "addbkpt",	87	.name = "addbkpt",
85	.description = "addbkpt <&symbol> - new breakpoint.",	88	.description = "addbkpt <&symbol> - new breakpoint.",
86	.func = cmd_add_breakpoint,	89	.func = cmd_add_breakpoint,
87	.argc = 1,	90	.argc = 1,
88	.argv = &add_argv	91	.argv = &add_argv
89	};	92	};
90		93
91	static cmd_arg_t addw_argv = {	94	static cmd_arg_t addw_argv = {
92	.type = ARG_TYPE_INT	95	.type = ARG_TYPE_INT
93	};	96	};
94	static cmd_info_t addwatchp_info = {	97	static cmd_info_t addwatchp_info = {
95	.name = "addwatchp",	98	.name = "addwatchp",
96	.description = "addbwatchp <&symbol> - new write watchpoint.",	99	.description = "addbwatchp <&symbol> - new write watchpoint.",
97	.func = cmd_add_breakpoint,	100	.func = cmd_add_breakpoint,
98	.argc = 1,	101	.argc = 1,
99	.argv = &addw_argv	102	.argv = &addw_argv
100	};	103	};
101		104
102	#endif /* CONFIG_KCONSOLE */	105	#endif /* CONFIG_KCONSOLE */
103		106
104	/* Setup DR register according to table */	107	/* Setup DR register according to table */
105	static void setup_dr(int curidx)	108	static void setup_dr(int curidx)
106	{	109	{
107	unative_t dr7;	110	unative_t dr7;
108	bpinfo_t *cur = &breakpoints[curidx];	111	bpinfo_t *cur = &breakpoints[curidx];
109	int flags = breakpoints[curidx].flags;	112	int flags = breakpoints[curidx].flags;
110		113
111	/* Disable breakpoint in DR7 */	114	/* Disable breakpoint in DR7 */
112	dr7 = read_dr7();	115	dr7 = read_dr7();
113	dr7 &= ~(0x2 << (curidx*2));	116	dr7 &= ~(0x2 << (curidx*2));
114		117
115	if (cur->address) { /* Setup DR register */	118	if (cur->address) { /* Setup DR register */
116	/* Set breakpoint to debug registers */	119	/* Set breakpoint to debug registers */
117	switch (curidx) {	120	switch (curidx) {
118	case 0:	121	case 0:
119	write_dr0(cur->address);	122	write_dr0(cur->address);
120	break;	123	break;
121	case 1:	124	case 1:
122	write_dr1(cur->address);	125	write_dr1(cur->address);
123	break;	126	break;
124	case 2:	127	case 2:
125	write_dr2(cur->address);	128	write_dr2(cur->address);
126	break;	129	break;
127	case 3:	130	case 3:
128	write_dr3(cur->address);	131	write_dr3(cur->address);
129	break;	132	break;
130	}	133	}
131	/* Set type to requested breakpoint & length*/	134	/* Set type to requested breakpoint & length*/
132	dr7 &= ~ (0x3 << (16 + 4*curidx));	135	dr7 &= ~ (0x3 << (16 + 4*curidx));
133	dr7 &= ~ (0x3 << (18 + 4*curidx));	136	dr7 &= ~ (0x3 << (18 + 4*curidx));
134	if ((flags & BKPOINT_INSTR)) {	137	if ((flags & BKPOINT_INSTR)) {
135	;	138	;
136	} else {	139	} else {
137		140
138	#ifdef __32_BITS__	141	#ifdef __32_BITS__
139	dr7 \|= ((unative_t) 0x3) << (18 + 4 * curidx);	142	dr7 \|= ((unative_t) 0x3) << (18 + 4 * curidx);
140	#endif	143	#endif
141		144
142	#ifdef __64_BITS__	145	#ifdef __64_BITS__
143	dr7 \|= ((unative_t) 0x2) << (18 + 4 * curidx);	146	dr7 \|= ((unative_t) 0x2) << (18 + 4 * curidx);
144	#endif	147	#endif
145		148
146	if ((flags & BKPOINT_WRITE))	149	if ((flags & BKPOINT_WRITE))
147	dr7 \|= ((unative_t) 0x1) << (16 + 4 * curidx);	150	dr7 \|= ((unative_t) 0x1) << (16 + 4 * curidx);
148	else if ((flags & BKPOINT_READ_WRITE))	151	else if ((flags & BKPOINT_READ_WRITE))
149	dr7 \|= ((unative_t) 0x3) << (16 + 4 * curidx);	152	dr7 \|= ((unative_t) 0x3) << (16 + 4 * curidx);
150	}	153	}
151		154
152	/* Enable global breakpoint */	155	/* Enable global breakpoint */
153	dr7 \|= 0x2 << (curidx * 2);	156	dr7 \|= 0x2 << (curidx * 2);
154		157
155	write_dr7(dr7);	158	write_dr7(dr7);
156		159
157	}	160	}
158	}	161	}
159		162
160	/** Enable hardware breakpoint	163	/** Enable hardware breakpoint
161	*	164	*
162	* @param where Address of HW breakpoint	165	* @param where Address of HW breakpoint
163	* @param flags Type of breakpoint (EXECUTE, WRITE)	166	* @param flags Type of breakpoint (EXECUTE, WRITE)
164	* @return Debug slot on success, -1 - no available HW breakpoint	167	* @return Debug slot on success, -1 - no available HW breakpoint
165	*/	168	*/
166	int breakpoint_add(const void *where, const int flags, int curidx)	169	int breakpoint_add(const void *where, const int flags, int curidx)
167	{	170	{
168	ipl_t ipl;	171	ipl_t ipl;
169	int i;	172	int i;
170	bpinfo_t *cur;	173	bpinfo_t *cur;
171		174
172	ASSERT(flags & (BKPOINT_INSTR \| BKPOINT_WRITE \| BKPOINT_READ_WRITE));	175	ASSERT(flags & (BKPOINT_INSTR \| BKPOINT_WRITE \| BKPOINT_READ_WRITE));
173		176
174	ipl = interrupts_disable();	177	ipl = interrupts_disable();
175	spinlock_lock(&bkpoint_lock);	178	spinlock_lock(&bkpoint_lock);
176		179
177	if (curidx == -1) {	180	if (curidx == -1) {
178	/* Find free space in slots */	181	/* Find free space in slots */
179	for (i = 0; i < BKPOINTS_MAX; i++)	182	for (i = 0; i < BKPOINTS_MAX; i++)
180	if (!breakpoints[i].address) {	183	if (!breakpoints[i].address) {
181	curidx = i;	184	curidx = i;
182	break;	185	break;
183	}	186	}
184	if (curidx == -1) {	187	if (curidx == -1) {
185	/* Too many breakpoints */	188	/* Too many breakpoints */
186	spinlock_unlock(&bkpoint_lock);	189	spinlock_unlock(&bkpoint_lock);
187	interrupts_restore(ipl);	190	interrupts_restore(ipl);
188	return -1;	191	return -1;
189	}	192	}
190	}	193	}
191	cur = &breakpoints[curidx];	194	cur = &breakpoints[curidx];
192		195
193	cur->address = (uintptr_t) where;	196	cur->address = (uintptr_t) where;
194	cur->flags = flags;	197	cur->flags = flags;
195	cur->counter = 0;	198	cur->counter = 0;
196		199
197	setup_dr(curidx);	200	setup_dr(curidx);
198		201
199	spinlock_unlock(&bkpoint_lock);	202	spinlock_unlock(&bkpoint_lock);
200	interrupts_restore(ipl);	203	interrupts_restore(ipl);
201		204
202	/* Send IPI */	205	/* Send IPI */
203	#ifdef CONFIG_SMP	206	#ifdef CONFIG_SMP
204	// ipi_broadcast(VECTOR_DEBUG_IPI);	207	// ipi_broadcast(VECTOR_DEBUG_IPI);
205	#endif	208	#endif
206		209
207	return curidx;	210	return curidx;
208	}	211	}
209		212
210	#ifdef __64_BITS__	213	#ifdef __64_BITS__
211	#define getip(x) ((x)->rip)	214	#define getip(x) ((x)->rip)
212	#else	215	#else
213	#define getip(x) ((x)->eip)	216	#define getip(x) ((x)->eip)
214	#endif	217	#endif
215		218
216	static void handle_exception(int slot, istate_t *istate)	219	static void handle_exception(int slot, istate_t *istate)
217	{	220	{
218	ASSERT(breakpoints[slot].address);	221	ASSERT(breakpoints[slot].address);
219		222
220	/* Handle zero checker */	223	/* Handle zero checker */
221	if (! (breakpoints[slot].flags & BKPOINT_INSTR)) {	224	if (! (breakpoints[slot].flags & BKPOINT_INSTR)) {
222	if ((breakpoints[slot].flags & BKPOINT_CHECK_ZERO)) {	225	if ((breakpoints[slot].flags & BKPOINT_CHECK_ZERO)) {
223	if (((unative_t ) breakpoints[slot].address) != 0)	226	if (((unative_t ) breakpoints[slot].address) != 0)
224	return;	227	return;
225	printf("* Found ZERO on address %lx (slot %d) *\n",	228	printf("* Found ZERO on address %lx (slot %d) *\n",
226	breakpoints[slot].address, slot);	229	breakpoints[slot].address, slot);
227	} else {	230	} else {
228	printf("Data watchpoint - new data: %lx\n",	231	printf("Data watchpoint - new data: %lx\n",
229	((unative_t ) breakpoints[slot].address));	232	((unative_t ) breakpoints[slot].address));
230	}	233	}
231	}	234	}
-		235
-		236	#ifdef CONFIG_SYMTAB
232	printf("Reached breakpoint %d:%lx(%s)\n", slot, getip(istate),	237	printf("Reached breakpoint %d:%lx(%s)\n", slot, getip(istate),
233	get_symtab_entry(getip(istate)));	238	get_symtab_entry(getip(istate)));
-		239	#else
-		240	printf("Reached breakpoint %d:%lx\n", slot, getip(istate));
-		241	#endif
234		242
235	#ifdef CONFIG_KCONSOLE	243	#ifdef CONFIG_KCONSOLE
236	atomic_set(&haltstate, 1);	244	atomic_set(&haltstate, 1);
237	kconsole("debug", "Debug console ready.\n", false);	245	kconsole("debug", "Debug console ready.\n", false);
238	atomic_set(&haltstate, 0);	246	atomic_set(&haltstate, 0);
239	#endif	247	#endif
240	}	248	}
241		249
242	void breakpoint_del(int slot)	250	void breakpoint_del(int slot)
243	{	251	{
244	bpinfo_t *cur;	252	bpinfo_t *cur;
245	ipl_t ipl;	253	ipl_t ipl;
246		254
247	ipl = interrupts_disable();	255	ipl = interrupts_disable();
248	spinlock_lock(&bkpoint_lock);	256	spinlock_lock(&bkpoint_lock);
249		257
250	cur = &breakpoints[slot];	258	cur = &breakpoints[slot];
251	if (!cur->address) {	259	if (!cur->address) {
252	spinlock_unlock(&bkpoint_lock);	260	spinlock_unlock(&bkpoint_lock);
253	interrupts_restore(ipl);	261	interrupts_restore(ipl);
254	return;	262	return;
255	}	263	}
256		264
257	cur->address = NULL;	265	cur->address = NULL;
258		266
259	setup_dr(slot);	267	setup_dr(slot);
260		268
261	spinlock_unlock(&bkpoint_lock);	269	spinlock_unlock(&bkpoint_lock);
262	interrupts_restore(ipl);	270	interrupts_restore(ipl);
263	#ifdef CONFIG_SMP	271	#ifdef CONFIG_SMP
264	// ipi_broadcast(VECTOR_DEBUG_IPI);	272	// ipi_broadcast(VECTOR_DEBUG_IPI);
265	#endif	273	#endif
266	}	274	}
267		275
268		276
269		277
270	static void debug_exception(int n __attribute__((unused)), istate_t *istate)	278	static void debug_exception(int n __attribute__((unused)), istate_t *istate)
271	{	279	{
272	unative_t dr6;	280	unative_t dr6;
273	int i;	281	int i;
274		282
275	/* Set RF to restart the instruction */	283	/* Set RF to restart the instruction */
276	#ifdef __64_BITS__	284	#ifdef __64_BITS__
277	istate->rflags \|= RFLAGS_RF;	285	istate->rflags \|= RFLAGS_RF;
278	#else	286	#else
279	istate->eflags \|= EFLAGS_RF;	287	istate->eflags \|= EFLAGS_RF;
280	#endif	288	#endif
281		289
282	dr6 = read_dr6();	290	dr6 = read_dr6();
283	for (i=0; i < BKPOINTS_MAX; i++) {	291	for (i=0; i < BKPOINTS_MAX; i++) {
284	if (dr6 & (1 << i)) {	292	if (dr6 & (1 << i)) {
285	dr6 &= ~ (1 << i);	293	dr6 &= ~ (1 << i);
286	write_dr6(dr6);	294	write_dr6(dr6);
287		295
288	handle_exception(i, istate);	296	handle_exception(i, istate);
289	}	297	}
290	}	298	}
291	}	299	}
292		300
293	#ifdef CONFIG_SMP	301	#ifdef CONFIG_SMP
294	static void	302	static void
295	debug_ipi(int n __attribute__((unused)),	303	debug_ipi(int n __attribute__((unused)),
296	istate_t *istate __attribute__((unused)))	304	istate_t *istate __attribute__((unused)))
297	{	305	{
298	int i;	306	int i;
299		307
300	spinlock_lock(&bkpoint_lock);	308	spinlock_lock(&bkpoint_lock);
301	for (i = 0; i < BKPOINTS_MAX; i++)	309	for (i = 0; i < BKPOINTS_MAX; i++)
302	setup_dr(i);	310	setup_dr(i);
303	spinlock_unlock(&bkpoint_lock);	311	spinlock_unlock(&bkpoint_lock);
304	}	312	}
305	#endif	313	#endif
306		314
307	/** Initialize debugger */	315	/** Initialize debugger */
308	void debugger_init()	316	void debugger_init()
309	{	317	{
310	int i;	318	int i;
311		319
312	for (i = 0; i < BKPOINTS_MAX; i++)	320	for (i = 0; i < BKPOINTS_MAX; i++)
313	breakpoints[i].address = NULL;	321	breakpoints[i].address = NULL;
314		322
315	#ifdef CONFIG_KCONSOLE	323	#ifdef CONFIG_KCONSOLE
316	cmd_initialize(&bkpts_info);	324	cmd_initialize(&bkpts_info);
317	if (!cmd_register(&bkpts_info))	325	if (!cmd_register(&bkpts_info))
318	printf("Cannot register command %s\n", bkpts_info.name);	326	printf("Cannot register command %s\n", bkpts_info.name);
319		327
320	cmd_initialize(&delbkpt_info);	328	cmd_initialize(&delbkpt_info);
321	if (!cmd_register(&delbkpt_info))	329	if (!cmd_register(&delbkpt_info))
322	printf("Cannot register command %s\n", delbkpt_info.name);	330	printf("Cannot register command %s\n", delbkpt_info.name);
323		331
324	cmd_initialize(&addbkpt_info);	332	cmd_initialize(&addbkpt_info);
325	if (!cmd_register(&addbkpt_info))	333	if (!cmd_register(&addbkpt_info))
326	printf("Cannot register command %s\n", addbkpt_info.name);	334	printf("Cannot register command %s\n", addbkpt_info.name);
327		335
328	cmd_initialize(&addwatchp_info);	336	cmd_initialize(&addwatchp_info);
329	if (!cmd_register(&addwatchp_info))	337	if (!cmd_register(&addwatchp_info))
330	printf("Cannot register command %s\n", addwatchp_info.name);	338	printf("Cannot register command %s\n", addwatchp_info.name);
331	#endif /* CONFIG_KCONSOLE */	339	#endif /* CONFIG_KCONSOLE */
332		340
333	exc_register(VECTOR_DEBUG, "debugger", debug_exception);	341	exc_register(VECTOR_DEBUG, "debugger", debug_exception);
334	#ifdef CONFIG_SMP	342	#ifdef CONFIG_SMP
335	exc_register(VECTOR_DEBUG_IPI, "debugger_smp", debug_ipi);	343	exc_register(VECTOR_DEBUG_IPI, "debugger_smp", debug_ipi);
336	#endif	344	#endif
337	}	345	}
338		346
339	#ifdef CONFIG_KCONSOLE	347	#ifdef CONFIG_KCONSOLE
340	/** Print table of active breakpoints */	348	/** Print table of active breakpoints */
341	int cmd_print_breakpoints(cmd_arg_t *argv __attribute__((unused)))	349	int cmd_print_breakpoints(cmd_arg_t *argv __attribute__((unused)))
342	{	350	{
343	unsigned int i;	351	unsigned int i;
344	char *symbol;	352	char *symbol;
345		353
346	#ifdef __32_BITS__	354	#ifdef __32_BITS__
347	printf("# Count Address In symbol\n");	355	printf("# Count Address In symbol\n");
348	printf("-- ----- ---------- ---------\n");	356	printf("-- ----- ---------- ---------\n");
349	#endif	357	#endif
350		358
351	#ifdef __64_BITS__	359	#ifdef __64_BITS__
352	printf("# Count Address In symbol\n");	360	printf("# Count Address In symbol\n");
353	printf("-- ----- ------------------ ---------\n");	361	printf("-- ----- ------------------ ---------\n");
354	#endif	362	#endif
355		363
356	for (i = 0; i < BKPOINTS_MAX; i++)	364	for (i = 0; i < BKPOINTS_MAX; i++)
357	if (breakpoints[i].address) {	365	if (breakpoints[i].address) {
-		366	#ifdef CONFIG_SYMTAB
358	symbol = get_symtab_entry(breakpoints[i].address);	367	symbol = get_symtab_entry(breakpoints[i].address);
-		368	#else
-		369	symbol = "n/a";
-		370	#endif
359		371
360	#ifdef __32_BITS__	372	#ifdef __32_BITS__
361	printf("%-2u %-5d %#10zx %s\n", i,	373	printf("%-2u %-5d %#10zx %s\n", i,
362	breakpoints[i].counter, breakpoints[i].address,	374	breakpoints[i].counter, breakpoints[i].address,
363	symbol);	375	symbol);
364	#endif	376	#endif
365		377
366	#ifdef __64_BITS__	378	#ifdef __64_BITS__
367	printf("%-2u %-5d %#18zx %s\n", i,	379	printf("%-2u %-5d %#18zx %s\n", i,
368	breakpoints[i].counter, breakpoints[i].address,	380	breakpoints[i].counter, breakpoints[i].address,
369	symbol);	381	symbol);
370	#endif	382	#endif
371		383
372	}	384	}
373	return 1;	385	return 1;
374	}	386	}
375		387
376	/** Remove breakpoint from table */	388	/** Remove breakpoint from table */
377	int cmd_del_breakpoint(cmd_arg_t *argv)	389	int cmd_del_breakpoint(cmd_arg_t *argv)
378	{	390	{
379	unative_t bpno = argv->intval;	391	unative_t bpno = argv->intval;
380	if (bpno > BKPOINTS_MAX) {	392	if (bpno > BKPOINTS_MAX) {
381	printf("Invalid breakpoint number.\n");	393	printf("Invalid breakpoint number.\n");
382	return 0;	394	return 0;
383	}	395	}
384	breakpoint_del(argv->intval);	396	breakpoint_del(argv->intval);
385	return 1;	397	return 1;
386	}	398	}
387		399
388	/** Add new breakpoint to table */	400	/** Add new breakpoint to table */
389	static int cmd_add_breakpoint(cmd_arg_t *argv)	401	static int cmd_add_breakpoint(cmd_arg_t *argv)
390	{	402	{
391	int flags;	403	int flags;
392	int id;	404	int id;
393		405
394	if (argv == &add_argv) {	406	if (argv == &add_argv) {
395	flags = BKPOINT_INSTR;	407	flags = BKPOINT_INSTR;
396	} else { /* addwatchp */	408	} else { /* addwatchp */
397	flags = BKPOINT_WRITE;	409	flags = BKPOINT_WRITE;
398	}	410	}
399	printf("Adding breakpoint on address: %p\n", argv->intval);	411	printf("Adding breakpoint on address: %p\n", argv->intval);
400	id = breakpoint_add((void *)argv->intval, flags, -1);	412	id = breakpoint_add((void *)argv->intval, flags, -1);
401	if (id < 0)	413	if (id < 0)
402	printf("Add breakpoint failed.\n");	414	printf("Add breakpoint failed.\n");
403	else	415	else
404	printf("Added breakpoint %d.\n", id);	416	printf("Added breakpoint %d.\n", id);
405		417
406	return 1;	418	return 1;
407	}	419	}
408	#endif /* CONFIG_KCONSOLE */	420	#endif /* CONFIG_KCONSOLE */
409		421
410	/** @}	422	/** @}
411	*/	423	*/
412		424

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(root)/trunk/kernel/arch/amd64/src/debugger.c – Rev 4101 → 4132