xnu-792.12.6.tar.gz

[apple/xnu.git] / osfmk / kdp / ml / i386 / kdp_machdep.c

diff --git a/osfmk/kdp/ml/i386/kdp_machdep.c b/osfmk/kdp/ml/i386/kdp_machdep.c
index 09e93e2b4033df76527b7aa22f27c1573954bf1a..5faa82a74243477f59bfe032ab37f583c358edec 100644 (file)
--- a/osfmk/kdp/ml/i386/kdp_machdep.c
+++ b/osfmk/kdp/ml/i386/kdp_machdep.c
@@ -1,26 +1,33 @@
 /*
  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
  *
 /*
  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
  *

- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_START@

  * 
  * 

- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
+ * This file contains Original Code and/or Modifications of Original Code 
+ * as defined in and that are subject to the Apple Public Source License 
+ * Version 2.0 (the 'License'). You may not use this file except in 
+ * compliance with the License.  The rights granted to you under the 
+ * License may not be used to create, or enable the creation or 
+ * redistribution of, unlawful or unlicensed copies of an Apple operating 
+ * system, or to circumvent, violate, or enable the circumvention or 
+ * violation of, any terms of an Apple operating system software license 
+ * agreement.
+ *
+ * Please obtain a copy of the License at 
+ * http://www.opensource.apple.com/apsl/ and read it before using this 
+ * file.
+ *
+ * The Original Code and all software distributed under the License are 
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
+ * Please see the License for the specific language governing rights and 
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_END@

  */
  
  */
  

-#include <mach_kdp.h>

 #include <mach/mach_types.h>
 #include <mach/machine.h>
 #include <mach/exception_types.h>
 #include <mach/mach_types.h>
 #include <mach/machine.h>
 #include <mach/exception_types.h>


@@ -28,15 +35,6 @@
 #include <i386/trap.h>
 #include <i386/mp.h>
 #include <kdp/kdp_internal.h>
 #include <i386/trap.h>
 #include <i386/mp.h>
 #include <kdp/kdp_internal.h>

-#include <mach-o/loader.h>
-#include <mach-o/nlist.h>
-#include <IOKit/IOPlatformExpert.h> /* for PE_halt_restart */
-#include <kern/machine.h> /* for halt_all_cpus */
-
-#include <kern/thread.h>
-#include <i386/thread.h>
-#include <vm/vm_map.h>
-#include <i386/pmap.h>

 
 #define KDP_TEST_HARNESS 0
 #if KDP_TEST_HARNESS
 
 #define KDP_TEST_HARNESS 0
 #if KDP_TEST_HARNESS


@@ -45,8 +43,7 @@
 #define dprintf(x)
 #endif
 
 #define dprintf(x)
 #endif
 

-extern cpu_type_t cpuid_cputype(void);
-extern cpu_subtype_t cpuid_cpusubtype(void);
+extern void    kdreboot(void);

 
 void           print_saved_state(void *);
 void           kdp_call(void);
 
 void           print_saved_state(void *);
 void           kdp_call(void);


@@ -55,14 +52,12 @@ boolean_t   kdp_call_kdb(void);
 void           kdp_getstate(i386_thread_state_t *);
 void           kdp_setstate(i386_thread_state_t *);
 void           kdp_print_phys(int);
 void           kdp_getstate(i386_thread_state_t *);
 void           kdp_setstate(i386_thread_state_t *);
 void           kdp_print_phys(int);

-
-int
-machine_trace_thread(thread_t thread, uint32_t tracepos, uint32_t tracebound, int nframes, boolean_t user_p);
-
-int
-machine_trace_thread64(thread_t thread, uint32_t tracepos, uint32_t tracebound, int nframes, boolean_t user_p);
-
-extern unsigned kdp_vm_read(caddr_t src, caddr_t dst, unsigned len);
+void           kdp_i386_backtrace(void *, int);
+void           kdp_i386_trap(
+                       unsigned int,
+                       struct i386_saved_state *,
+                       kern_return_t,
+                       vm_offset_t);

 
 void
 kdp_exception(
 
 void
 kdp_exception(


@@ -123,13 +118,13 @@ kdp_exception_ack(
 
 void
 kdp_getstate(
 
 void
 kdp_getstate(

-    x86_thread_state32_t       *state
+    i386_thread_state_t                *state

 )
 {
 )
 {

-    static x86_thread_state32_t        null_state;
-    x86_saved_state32_t        *saved_state;
+    static i386_thread_state_t null_state;
+    struct i386_saved_state    *saved_state;

     
     

-    saved_state = (x86_saved_state32_t *)kdp.saved_state;
+    saved_state = (struct i386_saved_state *)kdp.saved_state;

     
     *state = null_state;       
     state->eax = saved_state->eax;
     
     *state = null_state;       
     state->eax = saved_state->eax;


@@ -160,12 +155,12 @@ kdp_getstate(
 
 void
 kdp_setstate(
 
 void
 kdp_setstate(

-    x86_thread_state32_t       *state
+    i386_thread_state_t                *state

 )
 {
 )
 {

-    x86_saved_state32_t                *saved_state;
+    struct i386_saved_state    *saved_state;

     
     

-    saved_state = (x86_saved_state32_t *)kdp.saved_state;
+    saved_state = (struct i386_saved_state *)kdp.saved_state;

 
     saved_state->eax = state->eax;
     saved_state->ebx = state->ebx;
 
     saved_state->eax = state->eax;
     saved_state->ebx = state->ebx;


@@ -193,21 +188,20 @@ kdp_machine_read_regs(
     __unused int *size
 )
 {
     __unused int *size
 )
 {

-    static struct i386_float_state  null_fpstate;
+    static i386_thread_fpstate_t null_fpstate;

 
     switch (flavor) {
 
 
     switch (flavor) {
 

-    case OLD_i386_THREAD_STATE:
-    case x86_THREAD_STATE32:
+    case i386_THREAD_STATE:

        dprintf(("kdp_readregs THREAD_STATE\n"));
        dprintf(("kdp_readregs THREAD_STATE\n"));

-       kdp_getstate((x86_thread_state32_t *)data);
-       *size = sizeof (x86_thread_state32_t);
+       kdp_getstate((i386_thread_state_t *)data);
+       *size = sizeof (i386_thread_state_t);

        return KDPERR_NO_ERROR;
        
        return KDPERR_NO_ERROR;
        

-    case x86_FLOAT_STATE32:
+    case i386_THREAD_FPSTATE:

        dprintf(("kdp_readregs THREAD_FPSTATE\n"));
        dprintf(("kdp_readregs THREAD_FPSTATE\n"));

-       *(x86_float_state32_t *)data = null_fpstate;
-       *size = sizeof (x86_float_state32_t);
+       *(i386_thread_fpstate_t *)data = null_fpstate;
+       *size = sizeof (i386_thread_fpstate_t);

        return KDPERR_NO_ERROR;
        
     default:
        return KDPERR_NO_ERROR;
        
     default:


@@ -227,13 +221,12 @@ kdp_machine_write_regs(
 {
     switch (flavor) {
 
 {
     switch (flavor) {
 

-    case OLD_i386_THREAD_STATE:
-    case x86_THREAD_STATE32:
+    case i386_THREAD_STATE:

        dprintf(("kdp_writeregs THREAD_STATE\n"));
        dprintf(("kdp_writeregs THREAD_STATE\n"));

-       kdp_setstate((x86_thread_state32_t *)data);
+       kdp_setstate((i386_thread_state_t *)data);

        return KDPERR_NO_ERROR;
        
        return KDPERR_NO_ERROR;
        

-    case x86_FLOAT_STATE32:
+    case i386_THREAD_FPSTATE:

        dprintf(("kdp_writeregs THREAD_FPSTATE\n"));
        return KDPERR_NO_ERROR;
        
        dprintf(("kdp_writeregs THREAD_FPSTATE\n"));
        return KDPERR_NO_ERROR;
        


@@ -261,8 +254,9 @@ kdp_machine_hostinfo(
         hostinfo->cpus_mask |= (1 << i);
     }
 
         hostinfo->cpus_mask |= (1 << i);
     }
 

-    hostinfo->cpu_type = cpuid_cputype();
-    hostinfo->cpu_subtype = cpuid_cpusubtype();
+   /* FIXME?? */
+    hostinfo->cpu_type = CPU_TYPE_I386;
+    hostinfo->cpu_subtype = CPU_SUBTYPE_486;

 }
 
 void
 }
 
 void


@@ -278,12 +272,7 @@ kdp_panic(
 void
 kdp_reboot(void)
 {
 void
 kdp_reboot(void)
 {

-       printf("Attempting system restart...");
-       /* Call the platform specific restart*/
-       if (PE_halt_restart)
-               (*PE_halt_restart)(kPERestartCPU);
-       /* If we do reach this, give up */
-       halt_all_cpus(TRUE);
+    kdreboot();

 }
 
 int
 }
 
 int


@@ -312,14 +301,14 @@ kdp_us_spin(int usec)
 
 void print_saved_state(void *state)
 {
 
 void print_saved_state(void *state)
 {

-    x86_saved_state32_t                *saved_state;
+    struct i386_saved_state    *saved_state;

 
     saved_state = state;
 
        kprintf("pc = 0x%x\n", saved_state->eip);
 
     saved_state = state;
 
        kprintf("pc = 0x%x\n", saved_state->eip);

-       kprintf("cr2= 0x%x\n", saved_state->cr2);
+       kprintf("cr3= 0x%x\n", saved_state->cr2);

        kprintf("rp = TODO FIXME\n");
        kprintf("rp = TODO FIXME\n");

-       kprintf("sp = 0x%x\n", saved_state);
+       kprintf("sp = 0x%x\n", saved_state->esp);

 
 }
 
 
 }
 


@@ -365,25 +354,52 @@ kdp_print_phys(int src)
 
 }
 
 
 }
 

-boolean_t
+
+#define MAX_FRAME_DELTA                65536
+
+void
+kdp_i386_backtrace(void        *_frame, int nframes)
+{
+       cframe_t        *frame = (cframe_t *)_frame;
+       int i;
+
+       for (i=0; i<nframes; i++) {
+           if ((vm_offset_t)frame < VM_MIN_KERNEL_ADDRESS ||
+               (vm_offset_t)frame > VM_MAX_KERNEL_ADDRESS) {
+               goto invalid;
+           }
+           kprintf("frame 0x%x called by 0x%x ",
+               frame, frame->caller);
+           kprintf("args 0x%x 0x%x 0x%x 0x%x\n",
+               frame->args[0], frame->args[1],
+               frame->args[2], frame->args[3]);
+           if ((frame->prev < frame) ||        /* wrong direction */
+               ((frame->prev - frame) > MAX_FRAME_DELTA)) {
+               goto invalid;
+           }
+           frame = frame->prev;
+       }
+       return;
+invalid:
+       kprintf("invalid frame pointer 0x%x\n",frame);
+}
+
+void

 kdp_i386_trap(
 kdp_i386_trap(

-    unsigned int       trapno,
-    x86_saved_state32_t        *saved_state,
+    unsigned int               trapno,
+    struct i386_saved_state    *saved_state,

     kern_return_t      result,
     vm_offset_t                va
 )
 {
     unsigned int exception, subcode = 0, code;
 
     kern_return_t      result,
     vm_offset_t                va
 )
 {
     unsigned int exception, subcode = 0, code;
 

-    if (trapno != T_INT3 && trapno != T_DEBUG) {
-       kprintf("unexpected kernel trap 0x%x eip 0x%x cr2 0x%x \n",
-               trapno, saved_state->eip, saved_state->cr2);
-       if (!kdp.is_conn)
-           return FALSE;
-    }  
-

     mp_kdp_enter();
 
     mp_kdp_enter();
 

+    if (trapno != T_INT3 && trapno != T_DEBUG)
+       kprintf("unexpected kernel trap 0x%x eip 0x%x cr2 0x%x \n",
+               trapno, saved_state->eip, saved_state->esp);
+

     switch (trapno) {
     
     case T_DIVIDE_ERROR:
     switch (trapno) {
     
     case T_DIVIDE_ERROR:


@@ -447,11 +463,11 @@ kdp_i386_trap(
        break;
     }
 
        break;
     }
 

+    kdp_i386_backtrace((void *) saved_state->ebp, 10);
+

     kdp_raise_exception(exception, code, subcode, saved_state);
 
     mp_kdp_exit();
     kdp_raise_exception(exception, code, subcode, saved_state);
 
     mp_kdp_exit();

-
-    return TRUE;

 }
 
 boolean_t 
 }
 
 boolean_t 


@@ -466,84 +482,3 @@ kdp_ml_get_breakinsn(void)
 {
   return 0xcc;
 }
 {
   return 0xcc;
 }

-extern pmap_t kdp_pmap;
-
-#define RETURN_OFFSET 4
-int
-machine_trace_thread(thread_t thread, uint32_t tracepos, uint32_t tracebound, int nframes, boolean_t user_p)
-{
-       uint32_t *tracebuf = (uint32_t *)tracepos;
-       uint32_t fence = 0;
-       uint32_t stackptr = 0;
-       uint32_t stacklimit = 0xfc000000;
-       int framecount = 0;
-       uint32_t init_eip = 0;
-       uint32_t prevsp = 0;
-       uint32_t framesize = 2 * sizeof(vm_offset_t);
-       
-       if (user_p) {
-               x86_saved_state32_t     *iss32;
-               
-               iss32 = USER_REGS32(thread);
-
-               init_eip = iss32->eip;
-               stackptr = iss32->ebp;
-
-               /* This bound isn't useful, but it doesn't hinder us*/
-               stacklimit = 0xffffffff;
-               kdp_pmap = thread->task->map->pmap;
-       }
-       else {
-               /*Examine the i386_saved_state at the base of the kernel stack*/
-               stackptr = STACK_IKS(thread->kernel_stack)->k_ebp;
-               init_eip = STACK_IKS(thread->kernel_stack)->k_eip;
-       }
-
-       *tracebuf++ = init_eip;
-
-       for (framecount = 0; framecount < nframes; framecount++) {
-
-               if ((tracebound - ((uint32_t) tracebuf)) < (4 * framesize)) {
-                       tracebuf--;
-                       break;
-               }
-
-               *tracebuf++ = stackptr;
-/* Invalid frame, or hit fence */
-               if (!stackptr || (stackptr == fence)) {
-                       break;
-               }
-               /* Stack grows downward */
-               if (stackptr < prevsp) {
-                       break;
-               }
-               /* Unaligned frame */
-               if (stackptr & 0x0000003) {
-                       break;
-               }
-               if (stackptr > stacklimit) {
-                       break;
-               }
-
-               if (kdp_vm_read((caddr_t) (stackptr + RETURN_OFFSET), (caddr_t) tracebuf, sizeof(caddr_t)) != sizeof(caddr_t)) {
-                       break;
-               }
-               tracebuf++;
-               
-               prevsp = stackptr;
-               if (kdp_vm_read((caddr_t) stackptr, (caddr_t) &stackptr, sizeof(caddr_t)) != sizeof(caddr_t)) {
-                       *tracebuf++ = 0;
-                       break;
-               }
-       }
-
-       kdp_pmap = 0;
-
-       return ((uint32_t) tracebuf - tracepos);
-}
-
-/* This is a stub until the x86 64-bit model becomes clear */
-int
-machine_trace_thread64(__unused thread_t thread, __unused uint32_t tracepos, __unused uint32_t tracebound, __unused int nframes, __unused boolean_t user_p) {
-       return 0;
-}