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>
 
 
#include <symtab.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);
 
#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));
        }
    }
 
 
    printf("Reached breakpoint %d:%lx (%s)\n", slot, getip(istate),
        symtab_fmt_name_lookup(getip(istate)));
 
 
 
 
#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) {
 
            symbol = symtab_fmt_name_lookup(
 
                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;
}
 
/** 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 4132	Rev 4137
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 <print.h>	38	#include <print.h>
39	#include <panic.h>	39	#include <panic.h>
40	#include <interrupt.h>	40	#include <interrupt.h>
41	#include <arch/asm.h>	41	#include <arch/asm.h>
42	#include <arch/cpu.h>	42	#include <arch/cpu.h>
43	#include <debug.h>	43	#include <debug.h>
44	#include <func.h>	44	#include <func.h>
45	#include <smp/ipi.h>	45	#include <smp/ipi.h>
46		-
47	#ifdef CONFIG_SYMTAB	-
48	#include <symtab.h>	46	#include <symtab.h>
49	#endif	-
50		47
51	typedef struct {	48	typedef struct {
52	uintptr_t address; /*< Breakpoint address /	49	uintptr_t address; /*< Breakpoint address /
53	int flags; /*< Flags regarding breakpoint /	50	int flags; /*< Flags regarding breakpoint /
54	int counter; /*< How many times the exception occured /	51	int counter; /*< How many times the exception occured /
55	} bpinfo_t;	52	} bpinfo_t;
56		53
57	static bpinfo_t breakpoints[BKPOINTS_MAX];	54	static bpinfo_t breakpoints[BKPOINTS_MAX];
58	SPINLOCK_INITIALIZE(bkpoint_lock);	55	SPINLOCK_INITIALIZE(bkpoint_lock);
59		56
60	#ifdef CONFIG_KCONSOLE	57	#ifdef CONFIG_KCONSOLE
61		58
62	static int cmd_print_breakpoints(cmd_arg_t *argv);	59	static int cmd_print_breakpoints(cmd_arg_t *argv);
63	static cmd_info_t bkpts_info = {	60	static cmd_info_t bkpts_info = {
64	.name = "bkpts",	61	.name = "bkpts",
65	.description = "Print breakpoint table.",	62	.description = "Print breakpoint table.",
66	.func = cmd_print_breakpoints,	63	.func = cmd_print_breakpoints,
67	.argc = 0,	64	.argc = 0,
68	};	65	};
69		66
70	static int cmd_del_breakpoint(cmd_arg_t *argv);	67	static int cmd_del_breakpoint(cmd_arg_t *argv);
71	static cmd_arg_t del_argv = {	68	static cmd_arg_t del_argv = {
72	.type = ARG_TYPE_INT	69	.type = ARG_TYPE_INT
73	};	70	};
74	static cmd_info_t delbkpt_info = {	71	static cmd_info_t delbkpt_info = {
75	.name = "delbkpt",	72	.name = "delbkpt",
76	.description = "delbkpt <number> - Delete breakpoint.",	73	.description = "delbkpt <number> - Delete breakpoint.",
77	.func = cmd_del_breakpoint,	74	.func = cmd_del_breakpoint,
78	.argc = 1,	75	.argc = 1,
79	.argv = &del_argv	76	.argv = &del_argv
80	};	77	};
81		78
82	static int cmd_add_breakpoint(cmd_arg_t *argv);	79	static int cmd_add_breakpoint(cmd_arg_t *argv);
83	static cmd_arg_t add_argv = {	80	static cmd_arg_t add_argv = {
84	.type = ARG_TYPE_INT	81	.type = ARG_TYPE_INT
85	};	82	};
86	static cmd_info_t addbkpt_info = {	83	static cmd_info_t addbkpt_info = {
87	.name = "addbkpt",	84	.name = "addbkpt",
88	.description = "addbkpt <&symbol> - new breakpoint.",	85	.description = "addbkpt <&symbol> - new breakpoint.",
89	.func = cmd_add_breakpoint,	86	.func = cmd_add_breakpoint,
90	.argc = 1,	87	.argc = 1,
91	.argv = &add_argv	88	.argv = &add_argv
92	};	89	};
93		90
94	static cmd_arg_t addw_argv = {	91	static cmd_arg_t addw_argv = {
95	.type = ARG_TYPE_INT	92	.type = ARG_TYPE_INT
96	};	93	};
97	static cmd_info_t addwatchp_info = {	94	static cmd_info_t addwatchp_info = {
98	.name = "addwatchp",	95	.name = "addwatchp",
99	.description = "addbwatchp <&symbol> - new write watchpoint.",	96	.description = "addbwatchp <&symbol> - new write watchpoint.",
100	.func = cmd_add_breakpoint,	97	.func = cmd_add_breakpoint,
101	.argc = 1,	98	.argc = 1,
102	.argv = &addw_argv	99	.argv = &addw_argv
103	};	100	};
104		101
105	#endif /* CONFIG_KCONSOLE */	102	#endif /* CONFIG_KCONSOLE */
106		103
107	/* Setup DR register according to table */	104	/* Setup DR register according to table */
108	static void setup_dr(int curidx)	105	static void setup_dr(int curidx)
109	{	106	{
110	unative_t dr7;	107	unative_t dr7;
111	bpinfo_t *cur = &breakpoints[curidx];	108	bpinfo_t *cur = &breakpoints[curidx];
112	int flags = breakpoints[curidx].flags;	109	int flags = breakpoints[curidx].flags;
113		110
114	/* Disable breakpoint in DR7 */	111	/* Disable breakpoint in DR7 */
115	dr7 = read_dr7();	112	dr7 = read_dr7();
116	dr7 &= ~(0x2 << (curidx*2));	113	dr7 &= ~(0x2 << (curidx*2));
117		114
118	if (cur->address) { /* Setup DR register */	115	if (cur->address) { /* Setup DR register */
119	/* Set breakpoint to debug registers */	116	/* Set breakpoint to debug registers */
120	switch (curidx) {	117	switch (curidx) {
121	case 0:	118	case 0:
122	write_dr0(cur->address);	119	write_dr0(cur->address);
123	break;	120	break;
124	case 1:	121	case 1:
125	write_dr1(cur->address);	122	write_dr1(cur->address);
126	break;	123	break;
127	case 2:	124	case 2:
128	write_dr2(cur->address);	125	write_dr2(cur->address);
129	break;	126	break;
130	case 3:	127	case 3:
131	write_dr3(cur->address);	128	write_dr3(cur->address);
132	break;	129	break;
133	}	130	}
134	/* Set type to requested breakpoint & length*/	131	/* Set type to requested breakpoint & length*/
135	dr7 &= ~ (0x3 << (16 + 4*curidx));	132	dr7 &= ~ (0x3 << (16 + 4*curidx));
136	dr7 &= ~ (0x3 << (18 + 4*curidx));	133	dr7 &= ~ (0x3 << (18 + 4*curidx));
137	if ((flags & BKPOINT_INSTR)) {	134	if ((flags & BKPOINT_INSTR)) {
138	;	135	;
139	} else {	136	} else {
140		137
141	#ifdef __32_BITS__	138	#ifdef __32_BITS__
142	dr7 \|= ((unative_t) 0x3) << (18 + 4 * curidx);	139	dr7 \|= ((unative_t) 0x3) << (18 + 4 * curidx);
143	#endif	140	#endif
144		141
145	#ifdef __64_BITS__	142	#ifdef __64_BITS__
146	dr7 \|= ((unative_t) 0x2) << (18 + 4 * curidx);	143	dr7 \|= ((unative_t) 0x2) << (18 + 4 * curidx);
147	#endif	144	#endif
148		145
149	if ((flags & BKPOINT_WRITE))	146	if ((flags & BKPOINT_WRITE))
150	dr7 \|= ((unative_t) 0x1) << (16 + 4 * curidx);	147	dr7 \|= ((unative_t) 0x1) << (16 + 4 * curidx);
151	else if ((flags & BKPOINT_READ_WRITE))	148	else if ((flags & BKPOINT_READ_WRITE))
152	dr7 \|= ((unative_t) 0x3) << (16 + 4 * curidx);	149	dr7 \|= ((unative_t) 0x3) << (16 + 4 * curidx);
153	}	150	}
154		151
155	/* Enable global breakpoint */	152	/* Enable global breakpoint */
156	dr7 \|= 0x2 << (curidx * 2);	153	dr7 \|= 0x2 << (curidx * 2);
157		154
158	write_dr7(dr7);	155	write_dr7(dr7);
159		156
160	}	157	}
161	}	158	}
162		159
163	/** Enable hardware breakpoint	160	/** Enable hardware breakpoint
164	*	161	*
165	* @param where Address of HW breakpoint	162	* @param where Address of HW breakpoint
166	* @param flags Type of breakpoint (EXECUTE, WRITE)	163	* @param flags Type of breakpoint (EXECUTE, WRITE)
167	* @return Debug slot on success, -1 - no available HW breakpoint	164	* @return Debug slot on success, -1 - no available HW breakpoint
168	*/	165	*/
169	int breakpoint_add(const void *where, const int flags, int curidx)	166	int breakpoint_add(const void *where, const int flags, int curidx)
170	{	167	{
171	ipl_t ipl;	168	ipl_t ipl;
172	int i;	169	int i;
173	bpinfo_t *cur;	170	bpinfo_t *cur;
174		171
175	ASSERT(flags & (BKPOINT_INSTR \| BKPOINT_WRITE \| BKPOINT_READ_WRITE));	172	ASSERT(flags & (BKPOINT_INSTR \| BKPOINT_WRITE \| BKPOINT_READ_WRITE));
176		173
177	ipl = interrupts_disable();	174	ipl = interrupts_disable();
178	spinlock_lock(&bkpoint_lock);	175	spinlock_lock(&bkpoint_lock);
179		176
180	if (curidx == -1) {	177	if (curidx == -1) {
181	/* Find free space in slots */	178	/* Find free space in slots */
182	for (i = 0; i < BKPOINTS_MAX; i++)	179	for (i = 0; i < BKPOINTS_MAX; i++)
183	if (!breakpoints[i].address) {	180	if (!breakpoints[i].address) {
184	curidx = i;	181	curidx = i;
185	break;	182	break;
186	}	183	}
187	if (curidx == -1) {	184	if (curidx == -1) {
188	/* Too many breakpoints */	185	/* Too many breakpoints */
189	spinlock_unlock(&bkpoint_lock);	186	spinlock_unlock(&bkpoint_lock);
190	interrupts_restore(ipl);	187	interrupts_restore(ipl);
191	return -1;	188	return -1;
192	}	189	}
193	}	190	}
194	cur = &breakpoints[curidx];	191	cur = &breakpoints[curidx];
195		192
196	cur->address = (uintptr_t) where;	193	cur->address = (uintptr_t) where;
197	cur->flags = flags;	194	cur->flags = flags;
198	cur->counter = 0;	195	cur->counter = 0;
199		196
200	setup_dr(curidx);	197	setup_dr(curidx);
201		198
202	spinlock_unlock(&bkpoint_lock);	199	spinlock_unlock(&bkpoint_lock);
203	interrupts_restore(ipl);	200	interrupts_restore(ipl);
204		201
205	/* Send IPI */	202	/* Send IPI */
206	#ifdef CONFIG_SMP	203	#ifdef CONFIG_SMP
207	// ipi_broadcast(VECTOR_DEBUG_IPI);	204	// ipi_broadcast(VECTOR_DEBUG_IPI);
208	#endif	205	#endif
209		206
210	return curidx;	207	return curidx;
211	}	208	}
212		209
213	#ifdef __64_BITS__	210	#ifdef __64_BITS__
214	#define getip(x) ((x)->rip)	211	#define getip(x) ((x)->rip)
215	#else	212	#else
216	#define getip(x) ((x)->eip)	213	#define getip(x) ((x)->eip)
217	#endif	214	#endif
218		215
219	static void handle_exception(int slot, istate_t *istate)	216	static void handle_exception(int slot, istate_t *istate)
220	{	217	{
221	ASSERT(breakpoints[slot].address);	218	ASSERT(breakpoints[slot].address);
222		219
223	/* Handle zero checker */	220	/* Handle zero checker */
224	if (! (breakpoints[slot].flags & BKPOINT_INSTR)) {	221	if (! (breakpoints[slot].flags & BKPOINT_INSTR)) {
225	if ((breakpoints[slot].flags & BKPOINT_CHECK_ZERO)) {	222	if ((breakpoints[slot].flags & BKPOINT_CHECK_ZERO)) {
226	if (((unative_t ) breakpoints[slot].address) != 0)	223	if (((unative_t ) breakpoints[slot].address) != 0)
227	return;	224	return;
228	printf("* Found ZERO on address %lx (slot %d) *\n",	225	printf("* Found ZERO on address %lx (slot %d) *\n",
229	breakpoints[slot].address, slot);	226	breakpoints[slot].address, slot);
230	} else {	227	} else {
231	printf("Data watchpoint - new data: %lx\n",	228	printf("Data watchpoint - new data: %lx\n",
232	((unative_t ) breakpoints[slot].address));	229	((unative_t ) breakpoints[slot].address));
233	}	230	}
234	}	231	}
235		232
236	#ifdef CONFIG_SYMTAB	-
237	printf("Reached breakpoint %d:%lx(%s)\n", slot, getip(istate),	233	printf("Reached breakpoint %d:%lx (%s)\n", slot, getip(istate),
238	get_symtab_entry(getip(istate)));	234	symtab_fmt_name_lookup(getip(istate)));
239	#else	-
240	printf("Reached breakpoint %d:%lx\n", slot, getip(istate));	-
241	#endif	-
242		235
243	#ifdef CONFIG_KCONSOLE	236	#ifdef CONFIG_KCONSOLE
244	atomic_set(&haltstate, 1);	237	atomic_set(&haltstate, 1);
245	kconsole("debug", "Debug console ready.\n", false);	238	kconsole("debug", "Debug console ready.\n", false);
246	atomic_set(&haltstate, 0);	239	atomic_set(&haltstate, 0);
247	#endif	240	#endif
248	}	241	}
249		242
250	void breakpoint_del(int slot)	243	void breakpoint_del(int slot)
251	{	244	{
252	bpinfo_t *cur;	245	bpinfo_t *cur;
253	ipl_t ipl;	246	ipl_t ipl;
254		247
255	ipl = interrupts_disable();	248	ipl = interrupts_disable();
256	spinlock_lock(&bkpoint_lock);	249	spinlock_lock(&bkpoint_lock);
257		250
258	cur = &breakpoints[slot];	251	cur = &breakpoints[slot];
259	if (!cur->address) {	252	if (!cur->address) {
260	spinlock_unlock(&bkpoint_lock);	253	spinlock_unlock(&bkpoint_lock);
261	interrupts_restore(ipl);	254	interrupts_restore(ipl);
262	return;	255	return;
263	}	256	}
264		257
265	cur->address = NULL;	258	cur->address = NULL;
266		259
267	setup_dr(slot);	260	setup_dr(slot);
268		261
269	spinlock_unlock(&bkpoint_lock);	262	spinlock_unlock(&bkpoint_lock);
270	interrupts_restore(ipl);	263	interrupts_restore(ipl);
271	#ifdef CONFIG_SMP	264	#ifdef CONFIG_SMP
272	// ipi_broadcast(VECTOR_DEBUG_IPI);	265	// ipi_broadcast(VECTOR_DEBUG_IPI);
273	#endif	266	#endif
274	}	267	}
275		268
276		269
277		270
278	static void debug_exception(int n __attribute__((unused)), istate_t *istate)	271	static void debug_exception(int n __attribute__((unused)), istate_t *istate)
279	{	272	{
280	unative_t dr6;	273	unative_t dr6;
281	int i;	274	int i;
282		275
283	/* Set RF to restart the instruction */	276	/* Set RF to restart the instruction */
284	#ifdef __64_BITS__	277	#ifdef __64_BITS__
285	istate->rflags \|= RFLAGS_RF;	278	istate->rflags \|= RFLAGS_RF;
286	#else	279	#else
287	istate->eflags \|= EFLAGS_RF;	280	istate->eflags \|= EFLAGS_RF;
288	#endif	281	#endif
289		282
290	dr6 = read_dr6();	283	dr6 = read_dr6();
291	for (i=0; i < BKPOINTS_MAX; i++) {	284	for (i=0; i < BKPOINTS_MAX; i++) {
292	if (dr6 & (1 << i)) {	285	if (dr6 & (1 << i)) {
293	dr6 &= ~ (1 << i);	286	dr6 &= ~ (1 << i);
294	write_dr6(dr6);	287	write_dr6(dr6);
295		288
296	handle_exception(i, istate);	289	handle_exception(i, istate);
297	}	290	}
298	}	291	}
299	}	292	}
300		293
301	#ifdef CONFIG_SMP	294	#ifdef CONFIG_SMP
302	static void	295	static void
303	debug_ipi(int n __attribute__((unused)),	296	debug_ipi(int n __attribute__((unused)),
304	istate_t *istate __attribute__((unused)))	297	istate_t *istate __attribute__((unused)))
305	{	298	{
306	int i;	299	int i;
307		300
308	spinlock_lock(&bkpoint_lock);	301	spinlock_lock(&bkpoint_lock);
309	for (i = 0; i < BKPOINTS_MAX; i++)	302	for (i = 0; i < BKPOINTS_MAX; i++)
310	setup_dr(i);	303	setup_dr(i);
311	spinlock_unlock(&bkpoint_lock);	304	spinlock_unlock(&bkpoint_lock);
312	}	305	}
313	#endif	306	#endif
314		307
315	/** Initialize debugger */	308	/** Initialize debugger */
316	void debugger_init()	309	void debugger_init()
317	{	310	{
318	int i;	311	int i;
319		312
320	for (i = 0; i < BKPOINTS_MAX; i++)	313	for (i = 0; i < BKPOINTS_MAX; i++)
321	breakpoints[i].address = NULL;	314	breakpoints[i].address = NULL;
322		315
323	#ifdef CONFIG_KCONSOLE	316	#ifdef CONFIG_KCONSOLE
324	cmd_initialize(&bkpts_info);	317	cmd_initialize(&bkpts_info);
325	if (!cmd_register(&bkpts_info))	318	if (!cmd_register(&bkpts_info))
326	printf("Cannot register command %s\n", bkpts_info.name);	319	printf("Cannot register command %s\n", bkpts_info.name);
327		320
328	cmd_initialize(&delbkpt_info);	321	cmd_initialize(&delbkpt_info);
329	if (!cmd_register(&delbkpt_info))	322	if (!cmd_register(&delbkpt_info))
330	printf("Cannot register command %s\n", delbkpt_info.name);	323	printf("Cannot register command %s\n", delbkpt_info.name);
331		324
332	cmd_initialize(&addbkpt_info);	325	cmd_initialize(&addbkpt_info);
333	if (!cmd_register(&addbkpt_info))	326	if (!cmd_register(&addbkpt_info))
334	printf("Cannot register command %s\n", addbkpt_info.name);	327	printf("Cannot register command %s\n", addbkpt_info.name);
335		328
336	cmd_initialize(&addwatchp_info);	329	cmd_initialize(&addwatchp_info);
337	if (!cmd_register(&addwatchp_info))	330	if (!cmd_register(&addwatchp_info))
338	printf("Cannot register command %s\n", addwatchp_info.name);	331	printf("Cannot register command %s\n", addwatchp_info.name);
339	#endif /* CONFIG_KCONSOLE */	332	#endif /* CONFIG_KCONSOLE */
340		333
341	exc_register(VECTOR_DEBUG, "debugger", debug_exception);	334	exc_register(VECTOR_DEBUG, "debugger", debug_exception);
342	#ifdef CONFIG_SMP	335	#ifdef CONFIG_SMP
343	exc_register(VECTOR_DEBUG_IPI, "debugger_smp", debug_ipi);	336	exc_register(VECTOR_DEBUG_IPI, "debugger_smp", debug_ipi);
344	#endif	337	#endif
345	}	338	}
346		339
347	#ifdef CONFIG_KCONSOLE	340	#ifdef CONFIG_KCONSOLE
348	/** Print table of active breakpoints */	341	/** Print table of active breakpoints */
349	int cmd_print_breakpoints(cmd_arg_t *argv __attribute__((unused)))	342	int cmd_print_breakpoints(cmd_arg_t *argv __attribute__((unused)))
350	{	343	{
351	unsigned int i;	344	unsigned int i;
352	char *symbol;	345	char *symbol;
353		346
354	#ifdef __32_BITS__	347	#ifdef __32_BITS__
355	printf("# Count Address In symbol\n");	348	printf("# Count Address In symbol\n");
356	printf("-- ----- ---------- ---------\n");	349	printf("-- ----- ---------- ---------\n");
357	#endif	350	#endif
358		351
359	#ifdef __64_BITS__	352	#ifdef __64_BITS__
360	printf("# Count Address In symbol\n");	353	printf("# Count Address In symbol\n");
361	printf("-- ----- ------------------ ---------\n");	354	printf("-- ----- ------------------ ---------\n");
362	#endif	355	#endif
363		356
364	for (i = 0; i < BKPOINTS_MAX; i++)	357	for (i = 0; i < BKPOINTS_MAX; i++)
365	if (breakpoints[i].address) {	358	if (breakpoints[i].address) {
366	#ifdef CONFIG_SYMTAB	-
367	symbol = get_symtab_entry(breakpoints[i].address);	359	symbol = symtab_fmt_name_lookup(
368	#else	-
369	symbol = "n/a";	360	breakpoints[i].address);
370	#endif	-
371		361
372	#ifdef __32_BITS__	362	#ifdef __32_BITS__
373	printf("%-2u %-5d %#10zx %s\n", i,	363	printf("%-2u %-5d %#10zx %s\n", i,
374	breakpoints[i].counter, breakpoints[i].address,	364	breakpoints[i].counter, breakpoints[i].address,
375	symbol);	365	symbol);
376	#endif	366	#endif
377		367
378	#ifdef __64_BITS__	368	#ifdef __64_BITS__
379	printf("%-2u %-5d %#18zx %s\n", i,	369	printf("%-2u %-5d %#18zx %s\n", i,
380	breakpoints[i].counter, breakpoints[i].address,	370	breakpoints[i].counter, breakpoints[i].address,
381	symbol);	371	symbol);
382	#endif	372	#endif
383		373
384	}	374	}
385	return 1;	375	return 1;
386	}	376	}
387		377
388	/** Remove breakpoint from table */	378	/** Remove breakpoint from table */
389	int cmd_del_breakpoint(cmd_arg_t *argv)	379	int cmd_del_breakpoint(cmd_arg_t *argv)
390	{	380	{
391	unative_t bpno = argv->intval;	381	unative_t bpno = argv->intval;
392	if (bpno > BKPOINTS_MAX) {	382	if (bpno > BKPOINTS_MAX) {
393	printf("Invalid breakpoint number.\n");	383	printf("Invalid breakpoint number.\n");
394	return 0;	384	return 0;
395	}	385	}
396	breakpoint_del(argv->intval);	386	breakpoint_del(argv->intval);
397	return 1;	387	return 1;
398	}	388	}
399		389
400	/** Add new breakpoint to table */	390	/** Add new breakpoint to table */
401	static int cmd_add_breakpoint(cmd_arg_t *argv)	391	static int cmd_add_breakpoint(cmd_arg_t *argv)
402	{	392	{
403	int flags;	393	int flags;
404	int id;	394	int id;
405		395
406	if (argv == &add_argv) {	396	if (argv == &add_argv) {
407	flags = BKPOINT_INSTR;	397	flags = BKPOINT_INSTR;
408	} else { /* addwatchp */	398	} else { /* addwatchp */
409	flags = BKPOINT_WRITE;	399	flags = BKPOINT_WRITE;
410	}	400	}
411	printf("Adding breakpoint on address: %p\n", argv->intval);	401	printf("Adding breakpoint on address: %p\n", argv->intval);
412	id = breakpoint_add((void *)argv->intval, flags, -1);	402	id = breakpoint_add((void *)argv->intval, flags, -1);
413	if (id < 0)	403	if (id < 0)
414	printf("Add breakpoint failed.\n");	404	printf("Add breakpoint failed.\n");
415	else	405	else
416	printf("Added breakpoint %d.\n", id);	406	printf("Added breakpoint %d.\n", id);
417		407
418	return 1;	408	return 1;
419	}	409	}
420	#endif /* CONFIG_KCONSOLE */	410	#endif /* CONFIG_KCONSOLE */
421		411
422	/** @}	412	/** @}
423	*/	413	*/
424		414

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(root)/trunk/kernel/arch/amd64/src/debugger.c @ 2071 – Rev 4132 → 4137