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

 /*
  * Copyright (c) 2006 Ondrej Palkovsky
  * All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
+ *
  * - Redistributions of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
  * - Redistributions in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
  * - The name of the author may not be used to endorse or promote products
  *   derived from this software without specific prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 /** @addtogroup amd64debug
  * @{
  */
 /** @file
  */
 #include <arch/debugger.h>
 #include <console/kconsole.h>
 #include <console/cmd.h>
 #include <symtab.h>
 #include <print.h>
 #include <panic.h>
 #include <interrupt.h>
 #include <arch/asm.h>
 #include <arch/cpu.h>
 #include <debug.h>
 #include <func.h>
 #include <smp/ipi.h>
 typedef struct  {
     uintptr_t address;      /**< Breakpoint address */
     int flags;              /**< Flags regarding breakpoint */
     int counter;            /**< How many times the exception occured */
 } bpinfo_t;
 static bpinfo_t breakpoints[BKPOINTS_MAX];
 SPINLOCK_INITIALIZE(bkpoint_lock);
+#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,
 };
 #ifndef CONFIG_DEBUG_AS_WATCHPOINT
 static int cmd_del_breakpoint(cmd_arg_t *argv);
 static cmd_arg_t del_argv = {
     .type = ARG_TYPE_INT
 };
 static cmd_info_t delbkpt_info = {
     .name = "delbkpt",
     .description = "delbkpt <number> - Delete breakpoint.",
     .func = cmd_del_breakpoint,
     .argc = 1,
     .argv = &del_argv
 };
 static int cmd_add_breakpoint(cmd_arg_t *argv);
 static cmd_arg_t add_argv = {
     .type = ARG_TYPE_INT
 };
 static cmd_info_t addbkpt_info = {
     .name = "addbkpt",
     .description = "addbkpt <&symbol> - new breakpoint.",
     .func = cmd_add_breakpoint,
     .argc = 1,
     .argv = &add_argv
 };
 static cmd_arg_t addw_argv = {
     .type = ARG_TYPE_INT
 };
 static cmd_info_t addwatchp_info = {
     .name = "addwatchp",
     .description = "addbwatchp <&symbol> - new write watchpoint.",
     .func = cmd_add_breakpoint,
     .argc = 1,
     .argv = &addw_argv
 };
-#endif
-/** Print table of active breakpoints */
+#endif /* CONFIG_DEBUG_AS_WATCHPOINT */
-int cmd_print_breakpoints(cmd_arg_t *argv __attribute__((unused)))
-{
-    unsigned int i;
-    char *symbol;
-#ifdef __32_BITS__
+#endif /* CONFIG_KCONSOLE */
-    printf("#  Count Address    In symbol\n");
-    printf("-- ----- ---------- ---------\n");
-#endif
-#ifdef __64_BITS__
-    printf("#  Count Address            In symbol\n");
-    printf("-- ----- ------------------ ---------\n");
-#endif
-    for (i = 0; i < BKPOINTS_MAX; i++)
-        if (breakpoints[i].address) {
-            symbol = get_symtab_entry(breakpoints[i].address);
-#ifdef __32_BITS__
-            printf("%-2u %-5d %#10zx %s\n", i,
-                breakpoints[i].counter, breakpoints[i].address,
-                symbol);
-#endif
-#ifdef __64_BITS__
-            printf("%-2u %-5d %#18zx %s\n", i,
-                breakpoints[i].counter, breakpoints[i].address,
-                symbol);
-#endif
-        }
-    return 1;
-}
 /* Setup DR register according to table */
 static void setup_dr(int curidx)
+{
     unative_t dr7;
     bpinfo_t *cur = &breakpoints[curidx];
     int flags = breakpoints[curidx].flags;
     /* Disable breakpoint in DR7 */
     dr7 = read_dr7();
     dr7 &= ~(0x2 << (curidx*2));
     if (cur->address) { /* Setup DR register */
         /* Set breakpoint to debug registers */
         switch (curidx) {
         case 0:
             write_dr0(cur->address);
             break;
         case 1:
             write_dr1(cur->address);
             break;
         case 2:
             write_dr2(cur->address);
             break;
         case 3:
             write_dr3(cur->address);
             break;
+        }
         /* Set type to requested breakpoint & length*/
         dr7 &= ~ (0x3 << (16 + 4*curidx));
         dr7 &= ~ (0x3 << (18 + 4*curidx));
         if ((flags & BKPOINT_INSTR)) {
+            ;
         } else {
 #ifdef __32_BITS__
             dr7 |= ((unative_t) 0x3) << (18 + 4 * curidx);
 #endif
 #ifdef __64_BITS__
             dr7 |= ((unative_t) 0x2) << (18 + 4 * curidx);
 #endif
             if ((flags & BKPOINT_WRITE))
                 dr7 |= ((unative_t) 0x1) << (16 + 4 * curidx);
             else if ((flags & BKPOINT_READ_WRITE))
                 dr7 |= ((unative_t) 0x3) << (16 + 4 * curidx);
+        }
         /* Enable global breakpoint */
         dr7 |= 0x2 << (curidx * 2);
         write_dr7(dr7);
+    }
+}
 /** Enable hardware breakpoint
+ *
  * @param where Address of HW breakpoint
  * @param flags Type of breakpoint (EXECUTE, WRITE)
  * @return Debug slot on success, -1 - no available HW breakpoint
  */
 int breakpoint_add(const void *where, const int flags, int curidx)
+{
     ipl_t ipl;
     int i;
     bpinfo_t *cur;
     ASSERT(flags & (BKPOINT_INSTR | BKPOINT_WRITE | BKPOINT_READ_WRITE));
     ipl = interrupts_disable();
     spinlock_lock(&bkpoint_lock);
     if (curidx == -1) {
         /* Find free space in slots */
         for (i = 0; i < BKPOINTS_MAX; i++)
             if (!breakpoints[i].address) {
                 curidx = i;
                 break;
+            }
         if (curidx == -1) {
             /* Too many breakpoints */
             spinlock_unlock(&bkpoint_lock);
             interrupts_restore(ipl);
             return -1;
+        }
+    }
     cur = &breakpoints[curidx];
     cur->address = (uintptr_t) where;
     cur->flags = flags;
     cur->counter = 0;
     setup_dr(curidx);
     spinlock_unlock(&bkpoint_lock);
     interrupts_restore(ipl);
     /* Send IPI */
 #ifdef CONFIG_SMP
 //  ipi_broadcast(VECTOR_DEBUG_IPI);
 #endif
     return curidx;
+}
 #ifdef amd64
 #   define getip(x) ((x)->rip)
 #else
 #   define getip(x) ((x)->eip)
 #endif
 static void handle_exception(int slot, istate_t *istate)
+{
     ASSERT(breakpoints[slot].address);
     /* Handle zero checker */
     if (! (breakpoints[slot].flags & BKPOINT_INSTR)) {
         if ((breakpoints[slot].flags & BKPOINT_CHECK_ZERO)) {
             if (*((unative_t *) breakpoints[slot].address) != 0)
                 return;
             printf("*** Found ZERO on address %lx (slot %d) ***\n",
                 breakpoints[slot].address, slot);
         } else {
             printf("Data watchpoint - new data: %lx\n",
                 *((unative_t *) breakpoints[slot].address));
+        }
+    }
     printf("Reached breakpoint %d:%lx(%s)\n", slot, getip(istate),
         get_symtab_entry(getip(istate)));
-    printf("***Type 'exit' to exit kconsole.\n");
+#ifdef CONFIG_KCONSOLE
-    atomic_set(&haltstate,1);
+    atomic_set(&haltstate, 1);
-    kconsole((void *) "debug");
+    kconsole("debug", "Debug console ready (type 'exit' to continue)\n", false);
-    atomic_set(&haltstate,0);
+    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
+}
-#ifndef CONFIG_DEBUG_AS_WATCHPOINT
-/** Remove breakpoint from table */
-int cmd_del_breakpoint(cmd_arg_t *argv)
-{
-    unative_t bpno = argv->intval;
-    if (bpno > BKPOINTS_MAX) {
-        printf("Invalid breakpoint number.\n");
-        return 0;
-    }
-    breakpoint_del(argv->intval);
-    return 1;
-}
-/** Add new breakpoint to table */
-static int cmd_add_breakpoint(cmd_arg_t *argv)
-{
-    int flags;
-    int id;
-    if (argv == &add_argv) {
-        flags = BKPOINT_INSTR;
-    } else { /* addwatchp */
-        flags = BKPOINT_WRITE;
-    }
-    printf("Adding breakpoint on address: %p\n", argv->intval);
-    id = breakpoint_add((void *)argv->intval, flags, -1);
-    if (id < 0)
-        printf("Add breakpoint failed.\n");
-    else
-        printf("Added breakpoint %d.\n", id);
-    return 1;
-}
-#endif
 static void debug_exception(int n __attribute__((unused)), istate_t *istate)
+{
     unative_t dr6;
     int i;
     /* Set RF to restart the instruction  */
 #ifdef amd64
     istate->rflags |= RFLAGS_RF;
 #else
     istate->eflags |= EFLAGS_RF;
 #endif
     dr6 = read_dr6();
     for (i=0; i < BKPOINTS_MAX; i++) {
         if (dr6 & (1 << i)) {
             dr6 &= ~ (1 << i);
             write_dr6(dr6);
             handle_exception(i, istate);
+        }
+    }
+}
 #ifdef CONFIG_SMP
 static void
 debug_ipi(int n __attribute__((unused)),
     istate_t *istate __attribute__((unused)))
+{
     int i;
     spinlock_lock(&bkpoint_lock);
     for (i = 0; i < BKPOINTS_MAX; i++)
         setup_dr(i);
     spinlock_unlock(&bkpoint_lock);
+}
 #endif
 /** Initialize debugger */
 void debugger_init()
+{
     int i;
     for (i = 0; i < BKPOINTS_MAX; i++)
         breakpoints[i].address = NULL;
+#ifdef CONFIG_KCONSOLE
     cmd_initialize(&bkpts_info);
     if (!cmd_register(&bkpts_info))
-        panic("could not register command %s\n", bkpts_info.name);
+        printf("Cannot register command %s\n", bkpts_info.name);
 #ifndef CONFIG_DEBUG_AS_WATCHPOINT
     cmd_initialize(&delbkpt_info);
     if (!cmd_register(&delbkpt_info))
-        panic("could not register command %s\n", delbkpt_info.name);
+        printf("Cannot register command %s\n", delbkpt_info.name);
     cmd_initialize(&addbkpt_info);
     if (!cmd_register(&addbkpt_info))
-        panic("could not register command %s\n", addbkpt_info.name);
+        printf("Cannot register command %s\n", addbkpt_info.name);
     cmd_initialize(&addwatchp_info);
     if (!cmd_register(&addwatchp_info))
-        panic("could not register command %s\n", addwatchp_info.name);
+        printf("Cannot register command %s\n", addwatchp_info.name);
+#endif /* CONFIG_DEBUG_AS_WATCHPOINT */
-#endif
+#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 = get_symtab_entry(breakpoints[i].address);
+#ifdef __32_BITS__
+            printf("%-2u %-5d %#10zx %s\n", i,
+                breakpoints[i].counter, breakpoints[i].address,
+                symbol);
+#endif
+#ifdef __64_BITS__
+            printf("%-2u %-5d %#18zx %s\n", i,
+                breakpoints[i].counter, breakpoints[i].address,
+                symbol);
+#endif
+        }
+    return 1;
+}
+#ifndef CONFIG_DEBUG_AS_WATCHPOINT
+/** Remove breakpoint from table */
+int cmd_del_breakpoint(cmd_arg_t *argv)
+{
+    unative_t bpno = argv->intval;
+    if (bpno > BKPOINTS_MAX) {
+        printf("Invalid breakpoint number.\n");
+        return 0;
+    }
+    breakpoint_del(argv->intval);
+    return 1;
+}
+/** Add new breakpoint to table */
+static int cmd_add_breakpoint(cmd_arg_t *argv)
+{
+    int flags;
+    int id;
+    if (argv == &add_argv) {
+        flags = BKPOINT_INSTR;
+    } else { /* addwatchp */
+        flags = BKPOINT_WRITE;
+    }
+    printf("Adding breakpoint on address: %p\n", argv->intval);
+    id = breakpoint_add((void *)argv->intval, flags, -1);
+    if (id < 0)
+        printf("Add breakpoint failed.\n");
+    else
+        printf("Added breakpoint %d.\n", id);
+    return 1;
+}
+#endif /* CONFIG_DEBUG_AS_WATCHPOINT */
+#endif /* CONFIG_KCONSOLE */
 /** @}
  */

Subversion Repositories HelenOS

(root)/branches/sparc/kernel/arch/amd64/src/debugger.c – Rev 3343 → 3742