WebSVN – HelenOS – Diff – /trunk/kernel/arch/mips32/src/debugger.c


/*
 * Copyright (c) 2005 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 mips32debug
 * @{
 */
/** @file
 */
 
#include <arch/debugger.h>
#include <arch/barrier.h>
#include <memstr.h>
#include <console/kconsole.h>
#include <console/cmd.h>
#include <symtab.h>
#include <print.h>
#include <panic.h>
#include <arch.h>
#include <arch/cp0.h>
#include <func.h>
 
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 bkpoint. Break on J/Branch "
        "insts unsupported.",
    .func = cmd_add_breakpoint,
    .argc = 1,
    .argv = &add_argv
};
 
static cmd_arg_t adde_argv[] = {
    { .type = ARG_TYPE_INT },
    { .type = ARG_TYPE_INT }
};
static cmd_info_t addbkpte_info = {
    .name = "addbkpte",
    .description = "addebkpte <&symbol> <&func> - new bkpoint. Call "
        "func(or Nothing if 0).",
    .func = cmd_add_breakpoint,
    .argc = 2,
    .argv = adde_argv
};
 
static struct {
    uint32_t andmask;
    uint32_t value;
} jmpinstr[] = {
    {0xf3ff0000, 0x41000000}, /* BCzF */
    {0xf3ff0000, 0x41020000}, /* BCzFL */
    {0xf3ff0000, 0x41010000}, /* BCzT */
    {0xf3ff0000, 0x41030000}, /* BCzTL */
    {0xfc000000, 0x10000000}, /* BEQ */
    {0xfc000000, 0x50000000}, /* BEQL */
    {0xfc1f0000, 0x04010000}, /* BEQL */
    {0xfc1f0000, 0x04110000}, /* BGEZAL */
    {0xfc1f0000, 0x04130000}, /* BGEZALL */
    {0xfc1f0000, 0x04030000}, /* BGEZL */
    {0xfc1f0000, 0x1c000000}, /* BGTZ */
    {0xfc1f0000, 0x5c000000}, /* BGTZL */
    {0xfc1f0000, 0x18000000}, /* BLEZ */
    {0xfc1f0000, 0x58000000}, /* BLEZL */
    {0xfc1f0000, 0x04000000}, /* BLTZ */
    {0xfc1f0000, 0x04100000}, /* BLTZAL */
    {0xfc1f0000, 0x04120000}, /* BLTZALL */
    {0xfc1f0000, 0x04020000}, /* BLTZL */
    {0xfc000000, 0x14000000}, /* BNE */
    {0xfc000000, 0x54000000}, /* BNEL */
    {0xfc000000, 0x08000000}, /* J */
    {0xfc000000, 0x0c000000}, /* JAL */
    {0xfc1f07ff, 0x00000009}, /* JALR */
    {0, 0} /* EndOfTable */
};
 
 
/** Test, if the given instruction is a jump or branch instruction
 *
 * @param instr Instruction code
 * @return true - it is jump instruction, false otherwise
 *
 */
static bool is_jump(unative_t instr)
{
    int i;
 
    for (i = 0; jmpinstr[i].andmask; i++) {
        if ((instr & jmpinstr[i].andmask) == jmpinstr[i].value)
            return true;
    }
 
    return false;
}
 
/** Add new breakpoint to table */
int cmd_add_breakpoint(cmd_arg_t *argv)
{
    bpinfo_t *cur = NULL;
    ipl_t ipl;
    int i;
 
    if (argv->intval & 0x3) {
        printf("Not aligned instruction, forgot to use &symbol?\n");
        return 1;
    }
    ipl = interrupts_disable();
    spinlock_lock(&bkpoint_lock);
 
    /* Check, that the breakpoints do not conflict */
    for (i = 0; i < BKPOINTS_MAX; i++) {
        if (breakpoints[i].address == (uintptr_t)argv->intval) {
            printf("Duplicate breakpoint %d.\n", i);
            spinlock_unlock(&bkpoint_lock);
            return 0;
        } else if (breakpoints[i].address == (uintptr_t)argv->intval +
            sizeof(unative_t) || breakpoints[i].address ==
            (uintptr_t)argv->intval - sizeof(unative_t)) {
            printf("Adjacent breakpoints not supported, conflict "
                "with %d.\n", i);
            spinlock_unlock(&bkpoint_lock);
            return 0;
        }
       
    }
 
    for (i = 0; i < BKPOINTS_MAX; i++)
        if (!breakpoints[i].address) {
            cur = &breakpoints[i];
            break;
        }
    if (!cur) {
        printf("Too many breakpoints.\n");
        spinlock_unlock(&bkpoint_lock);
        interrupts_restore(ipl);
        return 0;
    }
    cur->address = (uintptr_t) argv->intval;
    printf("Adding breakpoint on address: %p\n", argv->intval);
    cur->instruction = ((unative_t *)cur->address)[0];
    cur->nextinstruction = ((unative_t *)cur->address)[1];
    if (argv == &add_argv) {
        cur->flags = 0;
    } else { /* We are add extended */
        cur->flags = BKPOINT_FUNCCALL;
        cur->bkfunc = (void (*)(void *, istate_t *)) argv[1].intval;
    }
    if (is_jump(cur->instruction))
        cur->flags |= BKPOINT_ONESHOT;
    cur->counter = 0;
 
    /* Set breakpoint */
    *((unative_t *)cur->address) = 0x0d;
    smc_coherence(cur->address);
 
    spinlock_unlock(&bkpoint_lock);
    interrupts_restore(ipl);
 
    return 1;
}
 
/** Remove breakpoint from table */
int cmd_del_breakpoint(cmd_arg_t *argv)
{
    bpinfo_t *cur;
    ipl_t ipl;
 
    if (argv->intval > BKPOINTS_MAX) {
        printf("Invalid breakpoint number.\n");
        return 0;
    }
    ipl = interrupts_disable();
    spinlock_lock(&bkpoint_lock);
 
    cur = &breakpoints[argv->intval];
    if (!cur->address) {
        printf("Breakpoint does not exist.\n");
        spinlock_unlock(&bkpoint_lock);
        interrupts_restore(ipl);
        return 0;
    }
    if ((cur->flags & BKPOINT_INPROG) && (cur->flags & BKPOINT_ONESHOT)) {
        printf("Cannot remove one-shot breakpoint in-progress\n");
        spinlock_unlock(&bkpoint_lock);
        interrupts_restore(ipl);
        return 0;
    }
    ((uint32_t *)cur->address)[0] = cur->instruction;
    smc_coherence(((uint32_t *)cur->address)[0]);
    ((uint32_t *)cur->address)[1] = cur->nextinstruction;
    smc_coherence(((uint32_t *)cur->address)[1]);
 
    cur->address = NULL;
 
    spinlock_unlock(&bkpoint_lock);
    interrupts_restore(ipl);
    return 1;
}
 
/** Print table of active breakpoints */
int cmd_print_breakpoints(cmd_arg_t *argv)
{
    unsigned int i;
    char *symbol;
   
    printf("#  Count Address    INPROG ONESHOT FUNCCALL In symbol\n");
    printf("-- ----- ---------- ------ ------- -------- ---------\n");
   
    for (i = 0; i < BKPOINTS_MAX; i++)
        if (breakpoints[i].address) {
            symbol = get_symtab_entry(breakpoints[i].address);
           
            printf("%-2u %-5d %#10zx %-6s %-7s %-8s %s\n", i,
                breakpoints[i].counter, breakpoints[i].address,
                ((breakpoints[i].flags & BKPOINT_INPROG) ? "true" :
                "false"), ((breakpoints[i].flags & BKPOINT_ONESHOT)
                ? "true" : "false"), ((breakpoints[i].flags &
                BKPOINT_FUNCCALL) ? "true" : "false"), symbol);
        }
    return 1;
}
 
#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(&addbkpte_info);
    if (!cmd_register(&addbkpte_info))
        printf("Cannot register command %s\n", addbkpte_info.name);
#endif
}
 
/** Handle breakpoint
 *
 * Find breakpoint in breakpoint table.
 * If found, call kconsole, set break on next instruction and reexecute.
 * If we are on "next instruction", set it back on the first and reexecute.
 * If breakpoint not found in breakpoint table, call kconsole and start
 * next instruction.
 */
void debugger_bpoint(istate_t *istate)
{
    bpinfo_t *cur = NULL;
    uintptr_t fireaddr = istate->epc;
    int i;
 
    /* test branch delay slot */
    if (cp0_cause_read() & 0x80000000)
        panic("Breakpoint in branch delay slot not supported.");
 
    spinlock_lock(&bkpoint_lock);
    for (i = 0; i < BKPOINTS_MAX; i++) {
        /* Normal breakpoint */
        if (fireaddr == breakpoints[i].address &&
            !(breakpoints[i].flags & BKPOINT_REINST)) {
            cur = &breakpoints[i];
            break;
        }
        /* Reinst only breakpoint */
        if ((breakpoints[i].flags & BKPOINT_REINST) &&
            (fireaddr == breakpoints[i].address + sizeof(unative_t))) {
            cur = &breakpoints[i];
            break;
        }
    }
    if (cur) {
        if (cur->flags & BKPOINT_REINST) {
            /* Set breakpoint on first instruction */
            ((uint32_t *)cur->address)[0] = 0x0d;
            smc_coherence(((uint32_t *)cur->address)[0]);
            /* Return back the second */
            ((uint32_t *)cur->address)[1] = cur->nextinstruction;
            smc_coherence(((uint32_t *)cur->address)[1]);
            cur->flags &= ~BKPOINT_REINST;
            spinlock_unlock(&bkpoint_lock);
            return;
        }
        if (cur->flags & BKPOINT_INPROG)
            printf("Warning: breakpoint recursion\n");
       
        if (!(cur->flags & BKPOINT_FUNCCALL))
            printf("***Breakpoint %d: %p in %s.\n", i, fireaddr,
                get_symtab_entry(istate->epc));
 
        /* Return first instruction back */
        ((uint32_t *)cur->address)[0] = cur->instruction;
        smc_coherence(cur->address);
 
        if (! (cur->flags & BKPOINT_ONESHOT)) {
            /* Set Breakpoint on next instruction */
            ((uint32_t *)cur->address)[1] = 0x0d;
            cur->flags |= BKPOINT_REINST;
        }
        cur->flags |= BKPOINT_INPROG;
    } else {
        printf("***Breakpoint %p in %s.\n", fireaddr,
               get_symtab_entry(fireaddr));
        /* Move on to next instruction */
        istate->epc += 4;
    }
    if (cur)
        cur->counter++;
    if (cur && (cur->flags & BKPOINT_FUNCCALL)) {
        /* Allow zero bkfunc, just for counting */
        if (cur->bkfunc)
            cur->bkfunc(cur, istate);
    } else {
#ifdef CONFIG_KCONSOLE
        /* This disables all other processors - we are not SMP,
         * actually this gets us to cpu_halt, if scheduler() is run
         * - we generally do not want scheduler to be run from debug,
         *   so this is a good idea
         */
        atomic_set(&haltstate, 1);
        spinlock_unlock(&bkpoint_lock);
       
        kconsole("debug", "Debug console ready (type 'exit' to continue)\n", false);
       
        spinlock_lock(&bkpoint_lock);
        atomic_set(&haltstate, 0);
#endif
    }
    if (cur && cur->address == fireaddr && (cur->flags & BKPOINT_INPROG)) {
        /* Remove one-shot breakpoint */
        if ((cur->flags & BKPOINT_ONESHOT))
            cur->address = NULL;
        /* Remove in-progress flag */
        cur->flags &= ~BKPOINT_INPROG;
    }
    spinlock_unlock(&bkpoint_lock);
}
 
/** @}
 */
 

Rev 3790	Rev 3913
1	/*	1	/*
2	* Copyright (c) 2005 Ondrej Palkovsky	2	* Copyright (c) 2005 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 mips32debug	29	/** @addtogroup mips32debug
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <arch/debugger.h>	35	#include <arch/debugger.h>
36	#include <arch/barrier.h>	36	#include <arch/barrier.h>
37	#include <memstr.h>	37	#include <memstr.h>
38	#include <console/kconsole.h>	38	#include <console/kconsole.h>
39	#include <console/cmd.h>	39	#include <console/cmd.h>
40	#include <symtab.h>	40	#include <symtab.h>
41	#include <print.h>	41	#include <print.h>
42	#include <panic.h>	42	#include <panic.h>
43	#include <arch.h>	43	#include <arch.h>
44	#include <arch/cp0.h>	44	#include <arch/cp0.h>
45	#include <func.h>	45	#include <func.h>
46		46
47	bpinfo_t breakpoints[BKPOINTS_MAX];	47	bpinfo_t breakpoints[BKPOINTS_MAX];
48	SPINLOCK_INITIALIZE(bkpoint_lock);	48	SPINLOCK_INITIALIZE(bkpoint_lock);
49		49
50	#ifdef CONFIG_KCONSOLE	50	#ifdef CONFIG_KCONSOLE
51		51
52	static int cmd_print_breakpoints(cmd_arg_t *argv);	52	static int cmd_print_breakpoints(cmd_arg_t *argv);
53	static cmd_info_t bkpts_info = {	53	static cmd_info_t bkpts_info = {
54	.name = "bkpts",	54	.name = "bkpts",
55	.description = "Print breakpoint table.",	55	.description = "Print breakpoint table.",
56	.func = cmd_print_breakpoints,	56	.func = cmd_print_breakpoints,
57	.argc = 0,	57	.argc = 0,
58	};	58	};
59		59
60	static int cmd_del_breakpoint(cmd_arg_t *argv);	60	static int cmd_del_breakpoint(cmd_arg_t *argv);
61	static cmd_arg_t del_argv = {	61	static cmd_arg_t del_argv = {
62	.type = ARG_TYPE_INT	62	.type = ARG_TYPE_INT
63	};	63	};
64	static cmd_info_t delbkpt_info = {	64	static cmd_info_t delbkpt_info = {
65	.name = "delbkpt",	65	.name = "delbkpt",
66	.description = "delbkpt <number> - Delete breakpoint.",	66	.description = "delbkpt <number> - Delete breakpoint.",
67	.func = cmd_del_breakpoint,	67	.func = cmd_del_breakpoint,
68	.argc = 1,	68	.argc = 1,
69	.argv = &del_argv	69	.argv = &del_argv
70	};	70	};
71		71
72	static int cmd_add_breakpoint(cmd_arg_t *argv);	72	static int cmd_add_breakpoint(cmd_arg_t *argv);
73	static cmd_arg_t add_argv = {	73	static cmd_arg_t add_argv = {
74	.type = ARG_TYPE_INT	74	.type = ARG_TYPE_INT
75	};	75	};
76	static cmd_info_t addbkpt_info = {	76	static cmd_info_t addbkpt_info = {
77	.name = "addbkpt",	77	.name = "addbkpt",
78	.description = "addbkpt <&symbol> - new bkpoint. Break on J/Branch "	78	.description = "addbkpt <&symbol> - new bkpoint. Break on J/Branch "
79	"insts unsupported.",	79	"insts unsupported.",
80	.func = cmd_add_breakpoint,	80	.func = cmd_add_breakpoint,
81	.argc = 1,	81	.argc = 1,
82	.argv = &add_argv	82	.argv = &add_argv
83	};	83	};
84		84
85	static cmd_arg_t adde_argv[] = {	85	static cmd_arg_t adde_argv[] = {
86	{ .type = ARG_TYPE_INT },	86	{ .type = ARG_TYPE_INT },
87	{ .type = ARG_TYPE_INT }	87	{ .type = ARG_TYPE_INT }
88	};	88	};
89	static cmd_info_t addbkpte_info = {	89	static cmd_info_t addbkpte_info = {
90	.name = "addbkpte",	90	.name = "addbkpte",
91	.description = "addebkpte <&symbol> <&func> - new bkpoint. Call "	91	.description = "addebkpte <&symbol> <&func> - new bkpoint. Call "
92	"func(or Nothing if 0).",	92	"func(or Nothing if 0).",
93	.func = cmd_add_breakpoint,	93	.func = cmd_add_breakpoint,
94	.argc = 2,	94	.argc = 2,
95	.argv = adde_argv	95	.argv = adde_argv
96	};	96	};
97		97
98	static struct {	98	static struct {
99	uint32_t andmask;	99	uint32_t andmask;
100	uint32_t value;	100	uint32_t value;
101	} jmpinstr[] = {	101	} jmpinstr[] = {
102	{0xf3ff0000, 0x41000000}, /* BCzF */	102	{0xf3ff0000, 0x41000000}, /* BCzF */
103	{0xf3ff0000, 0x41020000}, /* BCzFL */	103	{0xf3ff0000, 0x41020000}, /* BCzFL */
104	{0xf3ff0000, 0x41010000}, /* BCzT */	104	{0xf3ff0000, 0x41010000}, /* BCzT */
105	{0xf3ff0000, 0x41030000}, /* BCzTL */	105	{0xf3ff0000, 0x41030000}, /* BCzTL */
106	{0xfc000000, 0x10000000}, /* BEQ */	106	{0xfc000000, 0x10000000}, /* BEQ */
107	{0xfc000000, 0x50000000}, /* BEQL */	107	{0xfc000000, 0x50000000}, /* BEQL */
108	{0xfc1f0000, 0x04010000}, /* BEQL */	108	{0xfc1f0000, 0x04010000}, /* BEQL */
109	{0xfc1f0000, 0x04110000}, /* BGEZAL */	109	{0xfc1f0000, 0x04110000}, /* BGEZAL */
110	{0xfc1f0000, 0x04130000}, /* BGEZALL */	110	{0xfc1f0000, 0x04130000}, /* BGEZALL */
111	{0xfc1f0000, 0x04030000}, /* BGEZL */	111	{0xfc1f0000, 0x04030000}, /* BGEZL */
112	{0xfc1f0000, 0x1c000000}, /* BGTZ */	112	{0xfc1f0000, 0x1c000000}, /* BGTZ */
113	{0xfc1f0000, 0x5c000000}, /* BGTZL */	113	{0xfc1f0000, 0x5c000000}, /* BGTZL */
114	{0xfc1f0000, 0x18000000}, /* BLEZ */	114	{0xfc1f0000, 0x18000000}, /* BLEZ */
115	{0xfc1f0000, 0x58000000}, /* BLEZL */	115	{0xfc1f0000, 0x58000000}, /* BLEZL */
116	{0xfc1f0000, 0x04000000}, /* BLTZ */	116	{0xfc1f0000, 0x04000000}, /* BLTZ */
117	{0xfc1f0000, 0x04100000}, /* BLTZAL */	117	{0xfc1f0000, 0x04100000}, /* BLTZAL */
118	{0xfc1f0000, 0x04120000}, /* BLTZALL */	118	{0xfc1f0000, 0x04120000}, /* BLTZALL */
119	{0xfc1f0000, 0x04020000}, /* BLTZL */	119	{0xfc1f0000, 0x04020000}, /* BLTZL */
120	{0xfc000000, 0x14000000}, /* BNE */	120	{0xfc000000, 0x14000000}, /* BNE */
121	{0xfc000000, 0x54000000}, /* BNEL */	121	{0xfc000000, 0x54000000}, /* BNEL */
122	{0xfc000000, 0x08000000}, /* J */	122	{0xfc000000, 0x08000000}, /* J */
123	{0xfc000000, 0x0c000000}, /* JAL */	123	{0xfc000000, 0x0c000000}, /* JAL */
124	{0xfc1f07ff, 0x00000009}, /* JALR */	124	{0xfc1f07ff, 0x00000009}, /* JALR */
125	{0, 0} /* EndOfTable */	125	{0, 0} /* EndOfTable */
126	};	126	};
127		127
128		128
129	/** Test, if the given instruction is a jump or branch instruction	129	/** Test, if the given instruction is a jump or branch instruction
130	*	130	*
131	* @param instr Instruction code	131	* @param instr Instruction code
132	* @return true - it is jump instruction, false otherwise	132	* @return true - it is jump instruction, false otherwise
133	*	133	*
134	*/	134	*/
135	static bool is_jump(unative_t instr)	135	static bool is_jump(unative_t instr)
136	{	136	{
137	int i;	137	int i;
138		138
139	for (i = 0; jmpinstr[i].andmask; i++) {	139	for (i = 0; jmpinstr[i].andmask; i++) {
140	if ((instr & jmpinstr[i].andmask) == jmpinstr[i].value)	140	if ((instr & jmpinstr[i].andmask) == jmpinstr[i].value)
141	return true;	141	return true;
142	}	142	}
143		143
144	return false;	144	return false;
145	}	145	}
146		146
147	/** Add new breakpoint to table */	147	/** Add new breakpoint to table */
148	int cmd_add_breakpoint(cmd_arg_t *argv)	148	int cmd_add_breakpoint(cmd_arg_t *argv)
149	{	149	{
150	bpinfo_t *cur = NULL;	150	bpinfo_t *cur = NULL;
151	ipl_t ipl;	151	ipl_t ipl;
152	int i;	152	int i;
153		153
154	if (argv->intval & 0x3) {	154	if (argv->intval & 0x3) {
155	printf("Not aligned instruction, forgot to use &symbol?\n");	155	printf("Not aligned instruction, forgot to use &symbol?\n");
156	return 1;	156	return 1;
157	}	157	}
158	ipl = interrupts_disable();	158	ipl = interrupts_disable();
159	spinlock_lock(&bkpoint_lock);	159	spinlock_lock(&bkpoint_lock);
160		160
161	/* Check, that the breakpoints do not conflict */	161	/* Check, that the breakpoints do not conflict */
162	for (i = 0; i < BKPOINTS_MAX; i++) {	162	for (i = 0; i < BKPOINTS_MAX; i++) {
163	if (breakpoints[i].address == (uintptr_t)argv->intval) {	163	if (breakpoints[i].address == (uintptr_t)argv->intval) {
164	printf("Duplicate breakpoint %d.\n", i);	164	printf("Duplicate breakpoint %d.\n", i);
165	spinlock_unlock(&bkpoints_lock);	165	spinlock_unlock(&bkpoint_lock);
166	return 0;	166	return 0;
167	} else if (breakpoints[i].address == (uintptr_t)argv->intval +	167	} else if (breakpoints[i].address == (uintptr_t)argv->intval +
168	sizeof(unative_t) \|\| breakpoints[i].address ==	168	sizeof(unative_t) \|\| breakpoints[i].address ==
169	(uintptr_t)argv->intval - sizeof(unative_t)) {	169	(uintptr_t)argv->intval - sizeof(unative_t)) {
170	printf("Adjacent breakpoints not supported, conflict "	170	printf("Adjacent breakpoints not supported, conflict "
171	"with %d.\n", i);	171	"with %d.\n", i);
172	spinlock_unlock(&bkpoints_lock);	172	spinlock_unlock(&bkpoint_lock);
173	return 0;	173	return 0;
174	}	174	}
175		175
176	}	176	}
177		177
178	for (i = 0; i < BKPOINTS_MAX; i++)	178	for (i = 0; i < BKPOINTS_MAX; i++)
179	if (!breakpoints[i].address) {	179	if (!breakpoints[i].address) {
180	cur = &breakpoints[i];	180	cur = &breakpoints[i];
181	break;	181	break;
182	}	182	}
183	if (!cur) {	183	if (!cur) {
184	printf("Too many breakpoints.\n");	184	printf("Too many breakpoints.\n");
185	spinlock_unlock(&bkpoint_lock);	185	spinlock_unlock(&bkpoint_lock);
186	interrupts_restore(ipl);	186	interrupts_restore(ipl);
187	return 0;	187	return 0;
188	}	188	}
189	cur->address = (uintptr_t) argv->intval;	189	cur->address = (uintptr_t) argv->intval;
190	printf("Adding breakpoint on address: %p\n", argv->intval);	190	printf("Adding breakpoint on address: %p\n", argv->intval);
191	cur->instruction = ((unative_t *)cur->address)[0];	191	cur->instruction = ((unative_t *)cur->address)[0];
192	cur->nextinstruction = ((unative_t *)cur->address)[1];	192	cur->nextinstruction = ((unative_t *)cur->address)[1];
193	if (argv == &add_argv) {	193	if (argv == &add_argv) {
194	cur->flags = 0;	194	cur->flags = 0;
195	} else { /* We are add extended */	195	} else { /* We are add extended */
196	cur->flags = BKPOINT_FUNCCALL;	196	cur->flags = BKPOINT_FUNCCALL;
197	cur->bkfunc = (void ()(void , istate_t *)) argv[1].intval;	197	cur->bkfunc = (void ()(void , istate_t *)) argv[1].intval;
198	}	198	}
199	if (is_jump(cur->instruction))	199	if (is_jump(cur->instruction))
200	cur->flags \|= BKPOINT_ONESHOT;	200	cur->flags \|= BKPOINT_ONESHOT;
201	cur->counter = 0;	201	cur->counter = 0;
202		202
203	/* Set breakpoint */	203	/* Set breakpoint */
204	((unative_t )cur->address) = 0x0d;	204	((unative_t )cur->address) = 0x0d;
205	smc_coherence(cur->address);	205	smc_coherence(cur->address);
206		206
207	spinlock_unlock(&bkpoint_lock);	207	spinlock_unlock(&bkpoint_lock);
208	interrupts_restore(ipl);	208	interrupts_restore(ipl);
209		209
210	return 1;	210	return 1;
211	}	211	}
212		212
213	/** Remove breakpoint from table */	213	/** Remove breakpoint from table */
214	int cmd_del_breakpoint(cmd_arg_t *argv)	214	int cmd_del_breakpoint(cmd_arg_t *argv)
215	{	215	{
216	bpinfo_t *cur;	216	bpinfo_t *cur;
217	ipl_t ipl;	217	ipl_t ipl;
218		218
219	if (argv->intval > BKPOINTS_MAX) {	219	if (argv->intval > BKPOINTS_MAX) {
220	printf("Invalid breakpoint number.\n");	220	printf("Invalid breakpoint number.\n");
221	return 0;	221	return 0;
222	}	222	}
223	ipl = interrupts_disable();	223	ipl = interrupts_disable();
224	spinlock_lock(&bkpoint_lock);	224	spinlock_lock(&bkpoint_lock);
225		225
226	cur = &breakpoints[argv->intval];	226	cur = &breakpoints[argv->intval];
227	if (!cur->address) {	227	if (!cur->address) {
228	printf("Breakpoint does not exist.\n");	228	printf("Breakpoint does not exist.\n");
229	spinlock_unlock(&bkpoint_lock);	229	spinlock_unlock(&bkpoint_lock);
230	interrupts_restore(ipl);	230	interrupts_restore(ipl);
231	return 0;	231	return 0;
232	}	232	}
233	if ((cur->flags & BKPOINT_INPROG) && (cur->flags & BKPOINT_ONESHOT)) {	233	if ((cur->flags & BKPOINT_INPROG) && (cur->flags & BKPOINT_ONESHOT)) {
234	printf("Cannot remove one-shot breakpoint in-progress\n");	234	printf("Cannot remove one-shot breakpoint in-progress\n");
235	spinlock_unlock(&bkpoint_lock);	235	spinlock_unlock(&bkpoint_lock);
236	interrupts_restore(ipl);	236	interrupts_restore(ipl);
237	return 0;	237	return 0;
238	}	238	}
239	((uint32_t *)cur->address)[0] = cur->instruction;	239	((uint32_t *)cur->address)[0] = cur->instruction;
240	smc_coherence(((uint32_t *)cur->address)[0]);	240	smc_coherence(((uint32_t *)cur->address)[0]);
241	((uint32_t *)cur->address)[1] = cur->nextinstruction;	241	((uint32_t *)cur->address)[1] = cur->nextinstruction;
242	smc_coherence(((uint32_t *)cur->address)[1]);	242	smc_coherence(((uint32_t *)cur->address)[1]);
243		243
244	cur->address = NULL;	244	cur->address = NULL;
245		245
246	spinlock_unlock(&bkpoint_lock);	246	spinlock_unlock(&bkpoint_lock);
247	interrupts_restore(ipl);	247	interrupts_restore(ipl);
248	return 1;	248	return 1;
249	}	249	}
250		250
251	/** Print table of active breakpoints */	251	/** Print table of active breakpoints */
252	int cmd_print_breakpoints(cmd_arg_t *argv)	252	int cmd_print_breakpoints(cmd_arg_t *argv)
253	{	253	{
254	unsigned int i;	254	unsigned int i;
255	char *symbol;	255	char *symbol;
256		256
257	printf("# Count Address INPROG ONESHOT FUNCCALL In symbol\n");	257	printf("# Count Address INPROG ONESHOT FUNCCALL In symbol\n");
258	printf("-- ----- ---------- ------ ------- -------- ---------\n");	258	printf("-- ----- ---------- ------ ------- -------- ---------\n");
259		259
260	for (i = 0; i < BKPOINTS_MAX; i++)	260	for (i = 0; i < BKPOINTS_MAX; i++)
261	if (breakpoints[i].address) {	261	if (breakpoints[i].address) {
262	symbol = get_symtab_entry(breakpoints[i].address);	262	symbol = get_symtab_entry(breakpoints[i].address);
263		263
264	printf("%-2u %-5d %#10zx %-6s %-7s %-8s %s\n", i,	264	printf("%-2u %-5d %#10zx %-6s %-7s %-8s %s\n", i,
265	breakpoints[i].counter, breakpoints[i].address,	265	breakpoints[i].counter, breakpoints[i].address,
266	((breakpoints[i].flags & BKPOINT_INPROG) ? "true" :	266	((breakpoints[i].flags & BKPOINT_INPROG) ? "true" :
267	"false"), ((breakpoints[i].flags & BKPOINT_ONESHOT)	267	"false"), ((breakpoints[i].flags & BKPOINT_ONESHOT)
268	? "true" : "false"), ((breakpoints[i].flags &	268	? "true" : "false"), ((breakpoints[i].flags &
269	BKPOINT_FUNCCALL) ? "true" : "false"), symbol);	269	BKPOINT_FUNCCALL) ? "true" : "false"), symbol);
270	}	270	}
271	return 1;	271	return 1;
272	}	272	}
273		273
274	#endif	274	#endif
275		275
276	/** Initialize debugger */	276	/** Initialize debugger */
277	void debugger_init()	277	void debugger_init()
278	{	278	{
279	int i;	279	int i;
280		280
281	for (i = 0; i < BKPOINTS_MAX; i++)	281	for (i = 0; i < BKPOINTS_MAX; i++)
282	breakpoints[i].address = NULL;	282	breakpoints[i].address = NULL;
283		283
284	#ifdef CONFIG_KCONSOLE	284	#ifdef CONFIG_KCONSOLE
285	cmd_initialize(&bkpts_info);	285	cmd_initialize(&bkpts_info);
286	if (!cmd_register(&bkpts_info))	286	if (!cmd_register(&bkpts_info))
287	printf("Cannot register command %s\n", bkpts_info.name);	287	printf("Cannot register command %s\n", bkpts_info.name);
288		288
289	cmd_initialize(&delbkpt_info);	289	cmd_initialize(&delbkpt_info);
290	if (!cmd_register(&delbkpt_info))	290	if (!cmd_register(&delbkpt_info))
291	printf("Cannot register command %s\n", delbkpt_info.name);	291	printf("Cannot register command %s\n", delbkpt_info.name);
292		292
293	cmd_initialize(&addbkpt_info);	293	cmd_initialize(&addbkpt_info);
294	if (!cmd_register(&addbkpt_info))	294	if (!cmd_register(&addbkpt_info))
295	printf("Cannot register command %s\n", addbkpt_info.name);	295	printf("Cannot register command %s\n", addbkpt_info.name);
296		296
297	cmd_initialize(&addbkpte_info);	297	cmd_initialize(&addbkpte_info);
298	if (!cmd_register(&addbkpte_info))	298	if (!cmd_register(&addbkpte_info))
299	printf("Cannot register command %s\n", addbkpte_info.name);	299	printf("Cannot register command %s\n", addbkpte_info.name);
300	#endif	300	#endif
301	}	301	}
302		302
303	/** Handle breakpoint	303	/** Handle breakpoint
304	*	304	*
305	* Find breakpoint in breakpoint table.	305	* Find breakpoint in breakpoint table.
306	* If found, call kconsole, set break on next instruction and reexecute.	306	* If found, call kconsole, set break on next instruction and reexecute.
307	* If we are on "next instruction", set it back on the first and reexecute.	307	* If we are on "next instruction", set it back on the first and reexecute.
308	* If breakpoint not found in breakpoint table, call kconsole and start	308	* If breakpoint not found in breakpoint table, call kconsole and start
309	* next instruction.	309	* next instruction.
310	*/	310	*/
311	void debugger_bpoint(istate_t *istate)	311	void debugger_bpoint(istate_t *istate)
312	{	312	{
313	bpinfo_t *cur = NULL;	313	bpinfo_t *cur = NULL;
314	uintptr_t fireaddr = istate->epc;	314	uintptr_t fireaddr = istate->epc;
315	int i;	315	int i;
316		316
317	/* test branch delay slot */	317	/* test branch delay slot */
318	if (cp0_cause_read() & 0x80000000)	318	if (cp0_cause_read() & 0x80000000)
319	panic("Breakpoint in branch delay slot not supported.");	319	panic("Breakpoint in branch delay slot not supported.");
320		320
321	spinlock_lock(&bkpoint_lock);	321	spinlock_lock(&bkpoint_lock);
322	for (i = 0; i < BKPOINTS_MAX; i++) {	322	for (i = 0; i < BKPOINTS_MAX; i++) {
323	/* Normal breakpoint */	323	/* Normal breakpoint */
324	if (fireaddr == breakpoints[i].address &&	324	if (fireaddr == breakpoints[i].address &&
325	!(breakpoints[i].flags & BKPOINT_REINST)) {	325	!(breakpoints[i].flags & BKPOINT_REINST)) {
326	cur = &breakpoints[i];	326	cur = &breakpoints[i];
327	break;	327	break;
328	}	328	}
329	/* Reinst only breakpoint */	329	/* Reinst only breakpoint */
330	if ((breakpoints[i].flags & BKPOINT_REINST) &&	330	if ((breakpoints[i].flags & BKPOINT_REINST) &&
331	(fireaddr == breakpoints[i].address + sizeof(unative_t))) {	331	(fireaddr == breakpoints[i].address + sizeof(unative_t))) {
332	cur = &breakpoints[i];	332	cur = &breakpoints[i];
333	break;	333	break;
334	}	334	}
335	}	335	}
336	if (cur) {	336	if (cur) {
337	if (cur->flags & BKPOINT_REINST) {	337	if (cur->flags & BKPOINT_REINST) {
338	/* Set breakpoint on first instruction */	338	/* Set breakpoint on first instruction */
339	((uint32_t *)cur->address)[0] = 0x0d;	339	((uint32_t *)cur->address)[0] = 0x0d;
340	smc_coherence(((uint32_t *)cur->address)[0]);	340	smc_coherence(((uint32_t *)cur->address)[0]);
341	/* Return back the second */	341	/* Return back the second */
342	((uint32_t *)cur->address)[1] = cur->nextinstruction;	342	((uint32_t *)cur->address)[1] = cur->nextinstruction;
343	smc_coherence(((uint32_t *)cur->address)[1]);	343	smc_coherence(((uint32_t *)cur->address)[1]);
344	cur->flags &= ~BKPOINT_REINST;	344	cur->flags &= ~BKPOINT_REINST;
345	spinlock_unlock(&bkpoint_lock);	345	spinlock_unlock(&bkpoint_lock);
346	return;	346	return;
347	}	347	}
348	if (cur->flags & BKPOINT_INPROG)	348	if (cur->flags & BKPOINT_INPROG)
349	printf("Warning: breakpoint recursion\n");	349	printf("Warning: breakpoint recursion\n");
350		350
351	if (!(cur->flags & BKPOINT_FUNCCALL))	351	if (!(cur->flags & BKPOINT_FUNCCALL))
352	printf("***Breakpoint %d: %p in %s.\n", i, fireaddr,	352	printf("***Breakpoint %d: %p in %s.\n", i, fireaddr,
353	get_symtab_entry(istate->epc));	353	get_symtab_entry(istate->epc));
354		354
355	/* Return first instruction back */	355	/* Return first instruction back */
356	((uint32_t *)cur->address)[0] = cur->instruction;	356	((uint32_t *)cur->address)[0] = cur->instruction;
357	smc_coherence(cur->address);	357	smc_coherence(cur->address);
358		358
359	if (! (cur->flags & BKPOINT_ONESHOT)) {	359	if (! (cur->flags & BKPOINT_ONESHOT)) {
360	/* Set Breakpoint on next instruction */	360	/* Set Breakpoint on next instruction */
361	((uint32_t *)cur->address)[1] = 0x0d;	361	((uint32_t *)cur->address)[1] = 0x0d;
362	cur->flags \|= BKPOINT_REINST;	362	cur->flags \|= BKPOINT_REINST;
363	}	363	}
364	cur->flags \|= BKPOINT_INPROG;	364	cur->flags \|= BKPOINT_INPROG;
365	} else {	365	} else {
366	printf("***Breakpoint %p in %s.\n", fireaddr,	366	printf("***Breakpoint %p in %s.\n", fireaddr,
367	get_symtab_entry(fireaddr));	367	get_symtab_entry(fireaddr));
368	/* Move on to next instruction */	368	/* Move on to next instruction */
369	istate->epc += 4;	369	istate->epc += 4;
370	}	370	}
371	if (cur)	371	if (cur)
372	cur->counter++;	372	cur->counter++;
373	if (cur && (cur->flags & BKPOINT_FUNCCALL)) {	373	if (cur && (cur->flags & BKPOINT_FUNCCALL)) {
374	/* Allow zero bkfunc, just for counting */	374	/* Allow zero bkfunc, just for counting */
375	if (cur->bkfunc)	375	if (cur->bkfunc)
376	cur->bkfunc(cur, istate);	376	cur->bkfunc(cur, istate);
377	} else {	377	} else {
378	#ifdef CONFIG_KCONSOLE	378	#ifdef CONFIG_KCONSOLE
379	/* This disables all other processors - we are not SMP,	379	/* This disables all other processors - we are not SMP,
380	* actually this gets us to cpu_halt, if scheduler() is run	380	* actually this gets us to cpu_halt, if scheduler() is run
381	* - we generally do not want scheduler to be run from debug,	381	* - we generally do not want scheduler to be run from debug,
382	* so this is a good idea	382	* so this is a good idea
383	*/	383	*/
384	atomic_set(&haltstate, 1);	384	atomic_set(&haltstate, 1);
385	spinlock_unlock(&bkpoint_lock);	385	spinlock_unlock(&bkpoint_lock);
386		386
387	kconsole("debug", "Debug console ready (type 'exit' to continue)\n", false);	387	kconsole("debug", "Debug console ready (type 'exit' to continue)\n", false);
388		388
389	spinlock_lock(&bkpoint_lock);	389	spinlock_lock(&bkpoint_lock);
390	atomic_set(&haltstate, 0);	390	atomic_set(&haltstate, 0);
391	#endif	391	#endif
392	}	392	}
393	if (cur && cur->address == fireaddr && (cur->flags & BKPOINT_INPROG)) {	393	if (cur && cur->address == fireaddr && (cur->flags & BKPOINT_INPROG)) {
394	/* Remove one-shot breakpoint */	394	/* Remove one-shot breakpoint */
395	if ((cur->flags & BKPOINT_ONESHOT))	395	if ((cur->flags & BKPOINT_ONESHOT))
396	cur->address = NULL;	396	cur->address = NULL;
397	/* Remove in-progress flag */	397	/* Remove in-progress flag */
398	cur->flags &= ~BKPOINT_INPROG;	398	cur->flags &= ~BKPOINT_INPROG;
399	}	399	}
400	spinlock_unlock(&bkpoint_lock);	400	spinlock_unlock(&bkpoint_lock);
401	}	401	}
402		402
403	/** @}	403	/** @}
404	*/	404	*/
405		405

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/mips32/src/debugger.c @ 3790 – Rev 3790 → 3913