/*
- * Copyright (c) 2003-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2003-2007 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_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
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * 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 OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
+ * 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_OSREFERENCE_LICENSE_HEADER_END@
*/
#include <mach/mach_types.h>
__private_extern__ kern_return_t
chudxnu_thread_get_state(
- thread_t thread,
- thread_flavor_t flavor,
- thread_state_t tstate,
- mach_msg_type_number_t *count,
- boolean_t user_only)
+ thread_t thread,
+ thread_flavor_t flavor,
+ thread_state_t tstate,
+ mach_msg_type_number_t *count,
+ boolean_t user_only)
{
if (user_only) {
/* We can't get user state for kernel threads */
// i386 machine_thread_get_kern_state() is different from the PPC version which returns
// the previous save area - user or kernel - rather than kernel or NULL if no kernel
// interrupt state available
-
+
// the real purpose of this branch is the following:
// the user doesn't care if the thread states are user or kernel, he
// just wants the thread state, so we need to determine the proper one
// state. we still need to determine if this interrupt happened in
// kernel or user context
if(USER_STATE(thread) == current_cpu_datap()->cpu_int_state &&
- current_cpu_datap()->cpu_interrupt_level == 1) {
+ current_cpu_datap()->cpu_interrupt_level == 1) {
// interrupt happened in user land
return machine_thread_get_state(thread, flavor, tstate, count);
} else {
__private_extern__ kern_return_t
chudxnu_thread_set_state(
- thread_t thread,
- thread_flavor_t flavor,
- thread_state_t tstate,
- mach_msg_type_number_t count,
- boolean_t user_only)
+ thread_t thread,
+ thread_flavor_t flavor,
+ thread_state_t tstate,
+ mach_msg_type_number_t count,
+ boolean_t user_only)
{
#pragma unused (user_only)
return machine_thread_set_state(thread, flavor, tstate, count);
}
#pragma mark **** task memory read/write ****
-
+
__private_extern__ kern_return_t
chudxnu_task_read(
- task_t task,
- void *kernaddr,
- uint64_t usraddr,
- vm_size_t size)
+ task_t task,
+ void *kernaddr,
+ uint64_t usraddr,
+ vm_size_t size)
{
kern_return_t ret = KERN_SUCCESS;
-
- if(current_task()==task) {
- if(ml_at_interrupt_context()) {
- return KERN_FAILURE; // can't do copyin on interrupt stack
- }
+ boolean_t old_level;
+ if(ml_at_interrupt_context()) {
+ return KERN_FAILURE; // Can't look at tasks on interrupt stack
+ }
+
+ /*
+ * pmap layer requires interrupts to be on
+ */
+ old_level = ml_set_interrupts_enabled(TRUE);
+
+ if(current_task()==task) {
+
if(copyin(usraddr, kernaddr, size)) {
ret = KERN_FAILURE;
}
ret = vm_map_read_user(map, usraddr, kernaddr, size);
}
+ ml_set_interrupts_enabled(old_level);
+
return ret;
}
-
+
__private_extern__ kern_return_t
chudxnu_task_write(
- task_t task,
- uint64_t useraddr,
- void *kernaddr,
- vm_size_t size)
+ task_t task,
+ uint64_t useraddr,
+ void *kernaddr,
+ vm_size_t size)
{
kern_return_t ret = KERN_SUCCESS;
-
- if(current_task()==task) {
- if(ml_at_interrupt_context()) {
- return KERN_FAILURE; // can't do copyout on interrupt stack
- }
+ boolean_t old_level;
+
+ if(ml_at_interrupt_context()) {
+ return KERN_FAILURE; // can't poke into tasks on interrupt stack
+ }
+
+ /*
+ * pmap layer requires interrupts to be on
+ */
+ old_level = ml_set_interrupts_enabled(TRUE);
+ if(current_task()==task) {
+
if(copyout(kernaddr, useraddr, size)) {
ret = KERN_FAILURE;
}
vm_map_t map = get_task_map(task);
ret = vm_map_write_user(map, kernaddr, useraddr, size);
}
-
+
+ ml_set_interrupts_enabled(old_level);
+
return ret;
}
__private_extern__ kern_return_t
chudxnu_kern_read(void *dstaddr, vm_offset_t srcaddr, vm_size_t size)
{
- while(size>0) {
- ppnum_t pp;
- addr64_t phys_addr;
-
- /* Get the page number */
- pp = pmap_find_phys(kernel_pmap, srcaddr);
- if(!pp) {
- return KERN_FAILURE; /* Not mapped... */
- }
-
- /* Shove in the page offset */
- phys_addr = ((addr64_t)pp << 12) |
- (srcaddr & 0x0000000000000FFFULL);
- if(phys_addr >= mem_actual) {
- return KERN_FAILURE; /* out of range */
- }
-
- if((phys_addr&0x1) || size==1) {
- *((uint8_t *)dstaddr) =
- ml_phys_read_byte_64(phys_addr);
- dstaddr = ((uint8_t *)dstaddr) + 1;
- srcaddr += sizeof(uint8_t);
- size -= sizeof(uint8_t);
- } else if((phys_addr&0x3) || size<=2) {
- *((uint16_t *)dstaddr) =
- ml_phys_read_half_64(phys_addr);
- dstaddr = ((uint16_t *)dstaddr) + 1;
- srcaddr += sizeof(uint16_t);
- size -= sizeof(uint16_t);
- } else {
- *((uint32_t *)dstaddr) =
- ml_phys_read_word_64(phys_addr);
- dstaddr = ((uint32_t *)dstaddr) + 1;
- srcaddr += sizeof(uint32_t);
- size -= sizeof(uint32_t);
- }
- }
- return KERN_SUCCESS;
+ return (ml_nofault_copy(srcaddr, (vm_offset_t) dstaddr, size) == size ?
+ KERN_SUCCESS: KERN_FAILURE);
}
__private_extern__ kern_return_t
chudxnu_kern_write(
- vm_offset_t dstaddr,
- void *srcaddr,
- vm_size_t size)
+ vm_offset_t dstaddr,
+ void *srcaddr,
+ vm_size_t size)
{
- while(size>0) {
- ppnum_t pp;
- addr64_t phys_addr;
-
- /* Get the page number */
- pp = pmap_find_phys(kernel_pmap, dstaddr);
- if(!pp) {
- return KERN_FAILURE; /* Not mapped... */
- }
-
- /* Shove in the page offset */
- phys_addr = ((addr64_t)pp << 12) |
- (dstaddr & 0x0000000000000FFFULL);
- if(phys_addr > mem_actual) {
- return KERN_FAILURE; /* out of range */
- }
-
- if((phys_addr&0x1) || size==1) {
- ml_phys_write_byte_64(phys_addr, *((uint8_t *)srcaddr));
- srcaddr = ((uint8_t *)srcaddr) + 1;
- dstaddr += sizeof(uint8_t);
- size -= sizeof(uint8_t);
- } else if((phys_addr&0x3) || size<=2) {
- ml_phys_write_half_64(phys_addr, *((uint16_t *)srcaddr));
- srcaddr = ((uint16_t *)srcaddr) + 1;
- dstaddr += sizeof(uint16_t);
- size -= sizeof(uint16_t);
- } else {
- ml_phys_write_word_64(phys_addr, *((uint32_t *)srcaddr));
- srcaddr = ((uint32_t *)srcaddr) + 1;
- dstaddr += sizeof(uint32_t);
- size -= sizeof(uint32_t);
- }
- }
-
- return KERN_SUCCESS;
+ return (ml_nofault_copy((vm_offset_t) srcaddr, dstaddr, size) == size ?
+ KERN_SUCCESS: KERN_FAILURE);
}
#define VALID_STACK_ADDRESS(supervisor, addr, minKernAddr, maxKernAddr) (supervisor ? (addr>=minKernAddr && addr<=maxKernAddr) : TRUE)
// don't try to read in the hole
#define VALID_STACK_ADDRESS64(supervisor, addr, minKernAddr, maxKernAddr) \
- (supervisor ? (addr >= minKernAddr && addr <= maxKernAddr) : \
- (addr != 0 && (addr <= 0x00007FFFFFFFFFFFULL || addr >= 0xFFFF800000000000ULL)))
+(supervisor ? (addr >= minKernAddr && addr <= maxKernAddr) : \
+(addr != 0 && (addr <= 0x00007FFFFFFFFFFFULL || addr >= 0xFFFF800000000000ULL)))
typedef struct _cframe64_t {
uint64_t prevFP; // can't use a real pointer here until we're a 64 bit kernel
uint32_t args[0];
} cframe_t;
+extern void * find_user_regs(thread_t);
+extern x86_saved_state32_t *find_kern_regs(thread_t);
+
+static kern_return_t do_backtrace32(
+ task_t task,
+ thread_t thread,
+ x86_saved_state32_t *regs,
+ uint64_t *frames,
+ mach_msg_type_number_t *start_idx,
+ mach_msg_type_number_t max_idx,
+ boolean_t supervisor)
+{
+ uint32_t tmpWord = 0UL;
+ uint64_t currPC = (uint64_t) regs->eip;
+ uint64_t currFP = (uint64_t) regs->ebp;
+ uint64_t prevPC = 0ULL;
+ uint64_t prevFP = 0ULL;
+ uint64_t kernStackMin = thread->kernel_stack;
+ uint64_t kernStackMax = kernStackMin + KERNEL_STACK_SIZE;
+ mach_msg_type_number_t ct = *start_idx;
+ kern_return_t kr = KERN_FAILURE;
+
+ if(ct >= max_idx)
+ return KERN_RESOURCE_SHORTAGE; // no frames traced
+
+ frames[ct++] = currPC;
+
+ // build a backtrace of this 32 bit state.
+ while(VALID_STACK_ADDRESS(supervisor, currFP, kernStackMin, kernStackMax)) {
+ cframe_t *fp = (cframe_t *) (uint32_t) currFP;
+
+ if(!currFP) {
+ currPC = 0;
+ break;
+ }
+
+ if(ct >= max_idx) {
+ *start_idx = ct;
+ return KERN_RESOURCE_SHORTAGE;
+ }
+
+ /* read our caller */
+ if(supervisor) {
+ kr = chudxnu_kern_read(&tmpWord, (vm_offset_t) &fp->caller, sizeof(uint32_t));
+ } else {
+ kr = chudxnu_task_read(task, &tmpWord, (vm_offset_t) &fp->caller, sizeof(uint32_t));
+ }
+
+ if(kr != KERN_SUCCESS) {
+ currPC = 0ULL;
+ break;
+ }
+
+ currPC = (uint64_t) tmpWord; // promote 32 bit address
+
+ /*
+ * retrive contents of the frame pointer and advance to the next stack
+ * frame if it's valid
+ */
+ prevFP = 0;
+ if(supervisor) {
+ kr = chudxnu_kern_read(&tmpWord, (vm_offset_t)&fp->prev, sizeof(uint32_t));
+ } else {
+ kr = chudxnu_task_read(task, &tmpWord, (vm_offset_t)&fp->prev, sizeof(uint32_t));
+ }
+ prevFP = (uint64_t) tmpWord; // promote 32 bit address
+
+ if(prevFP) {
+ frames[ct++] = currPC;
+ prevPC = currPC;
+ }
+ if(prevFP < currFP) {
+ break;
+ } else {
+ currFP = prevFP;
+ }
+ }
+
+ *start_idx = ct;
+ return KERN_SUCCESS;
+}
+
+static kern_return_t do_backtrace64(
+ task_t task,
+ thread_t thread,
+ x86_saved_state64_t *regs,
+ uint64_t *frames,
+ mach_msg_type_number_t *start_idx,
+ mach_msg_type_number_t max_idx,
+ boolean_t supervisor)
+{
+ uint64_t currPC = regs->isf.rip;
+ uint64_t currFP = regs->rbp;
+ uint64_t prevPC = 0ULL;
+ uint64_t prevFP = 0ULL;
+ uint64_t kernStackMin = (uint64_t)thread->kernel_stack;
+ uint64_t kernStackMax = (uint64_t)kernStackMin + KERNEL_STACK_SIZE;
+ mach_msg_type_number_t ct = *start_idx;
+ kern_return_t kr = KERN_FAILURE;
+
+ if(*start_idx >= max_idx)
+ return KERN_RESOURCE_SHORTAGE; // no frames traced
+
+ frames[ct++] = currPC;
+
+ // build a backtrace of this 32 bit state.
+ while(VALID_STACK_ADDRESS64(supervisor, currFP, kernStackMin, kernStackMax)) {
+ // this is the address where caller lives in the user thread
+ uint64_t caller = currFP + sizeof(uint64_t);
+
+ if(!currFP) {
+ currPC = 0;
+ break;
+ }
+
+ if(ct >= max_idx) {
+ *start_idx = ct;
+ return KERN_RESOURCE_SHORTAGE;
+ }
+
+ /* read our caller */
+ if(supervisor) {
+ kr = KERN_FAILURE;
+ } else {
+ kr = chudxnu_task_read(task, &currPC, caller, sizeof(uint64_t));
+ }
+
+ if(kr != KERN_SUCCESS) {
+ currPC = 0ULL;
+ break;
+ }
+
+ /*
+ * retrive contents of the frame pointer and advance to the next stack
+ * frame if it's valid
+ */
+ prevFP = 0;
+ if(supervisor) {
+ kr = KERN_FAILURE;
+ } else {
+ kr = chudxnu_task_read(task, &prevFP, currFP, sizeof(uint64_t));
+ }
+
+ if(VALID_STACK_ADDRESS64(supervisor, prevFP, kernStackMin, kernStackMax)) {
+ frames[ct++] = currPC;
+ prevPC = currPC;
+ }
+ if(prevFP < currFP) {
+ break;
+ } else {
+ currFP = prevFP;
+ }
+ }
+
+ *start_idx = ct;
+ return KERN_SUCCESS;
+}
+
__private_extern__
kern_return_t chudxnu_thread_get_callstack64(
thread_t thread,
mach_msg_type_number_t *count,
boolean_t user_only)
{
- kern_return_t kr = KERN_FAILURE;
- kern_return_t ret = KERN_SUCCESS;
+ kern_return_t kr = KERN_FAILURE;
task_t task = thread->task;
uint64_t currPC = 0;
- uint64_t prevPC = 0;
- uint64_t currFP = 0;
- uint64_t prevFP = 0;
- uint64_t rsp = 0;
- uint64_t kernStackMin = min_valid_stack_address();
- uint64_t kernStackMax = max_valid_stack_address();
- uint64_t *buffer = callstack;
- int bufferIndex = 0;
- int bufferMaxIndex = *count;
- boolean_t supervisor = FALSE;
- boolean_t is64bit = FALSE;
- void * t_regs;
-
- if (user_only) {
- /* We can't get user state for kernel threads */
- if (task == kernel_task) {
+ boolean_t supervisor = FALSE;
+ mach_msg_type_number_t bufferIndex = 0;
+ mach_msg_type_number_t bufferMaxIndex = *count;
+ x86_saved_state_t *tagged_regs = NULL; // kernel register state
+ x86_saved_state64_t *regs64 = NULL;
+ x86_saved_state32_t *regs32 = NULL;
+ x86_saved_state32_t *u_regs32 = NULL;
+ x86_saved_state64_t *u_regs64 = NULL;
+
+ if(ml_at_interrupt_context()) {
+
+ if(user_only) {
+ /* can't backtrace user state on interrupt stack. */
return KERN_FAILURE;
}
- t_regs = USER_STATE(thread);
-
- if(is_saved_state64(t_regs)) {
- void *int_state = current_cpu_datap()->cpu_int_state;
- x86_saved_state64_t *s64 = saved_state64(t_regs);
+
+ /* backtracing at interrupt context? */
+ if(thread == current_thread() && current_cpu_datap()->cpu_int_state) {
+ /*
+ * Locate the registers for the interrupted thread, assuming it is
+ * current_thread().
+ */
+ tagged_regs = current_cpu_datap()->cpu_int_state;
- if(int_state) { // are we on an interrupt that happened in user land
- supervisor = !(t_regs == int_state && current_cpu_datap()->cpu_interrupt_level == 1);
+ if(is_saved_state64(tagged_regs)) {
+ /* 64 bit registers */
+ regs64 = saved_state64(tagged_regs);
+ supervisor = ((regs64->isf.cs & SEL_PL) != SEL_PL_U);
} else {
- if(s64) {
- supervisor = ((s64->isf.cs & SEL_PL) != SEL_PL_U);
- } else {
- // assume 32 bit kernel
- supervisor = FALSE;
- }
+ /* 32 bit registers */
+ regs32 = saved_state32(tagged_regs);
+ supervisor = ((regs32->cs & SEL_PL) != SEL_PL_U);
}
- is64bit = TRUE;
- } else {
- x86_saved_state32_t *regs;
+ }
+ }
- regs = saved_state32(t_regs);
-
- // find out if we're in supervisor mode
- supervisor = ((regs->cs & SEL_PL) != SEL_PL_U);
- is64bit = FALSE;
+ if(!tagged_regs) {
+ /*
+ * not at interrupt context, or tracing a different thread than
+ * current_thread() at interrupt context
+ */
+ tagged_regs = USER_STATE(thread);
+ if(is_saved_state64(tagged_regs)) {
+ /* 64 bit registers */
+ regs64 = saved_state64(tagged_regs);
+ supervisor = ((regs64->isf.cs & SEL_PL) != SEL_PL_U);
+ } else {
+ /* 32 bit registers */
+ regs32 = saved_state32(tagged_regs);
+ supervisor = ((regs32->cs & SEL_PL) != SEL_PL_U);
}
- } else {
- t_regs = current_cpu_datap()->cpu_int_state;
- x86_saved_state32_t *regs;
+ }
- regs = saved_state32(t_regs);
-
- // find out if we're in supervisor mode
- supervisor = ((regs->cs & SEL_PL) != SEL_PL_U);
- is64bit = FALSE;
- }
-
- if(is64bit) {
- x86_saved_state64_t *regs = saved_state64(t_regs);
-
+ *count = 0;
+
+ if(supervisor) {
+ // the caller only wants a user callstack.
if(user_only) {
- /* cant get user state for kernel threads */
- if(task == kernel_task) {
- return KERN_FAILURE;
- }
- regs = USER_REGS64(thread);
- }
-
- currPC = regs->isf.rip;
- currFP = regs->rbp;
-
- if(!currPC)
- {
- *count = 0;
+ // bail - we've only got kernel state
return KERN_FAILURE;
}
-
- bufferIndex = 0;
-
- //allot space for saving %rsp on the
- //bottom of the stack for user callstacks
- if(!supervisor)
- bufferMaxIndex = bufferMaxIndex - 1;
-
- if(bufferMaxIndex < 1) {
- *count = 0;
- return KERN_RESOURCE_SHORTAGE;
+ } else {
+ // regs32(64) is not in supervisor mode.
+ u_regs32 = regs32;
+ u_regs64 = regs64;
+ regs32 = NULL;
+ regs64 = NULL;
+ }
+
+ if (user_only) {
+ /* we only want to backtrace the user mode */
+ if(!(u_regs32 || u_regs64)) {
+ /* no user state to look at */
+ return KERN_FAILURE;
}
- buffer[bufferIndex++] = currPC; // save RIP on the top of the stack
-
- // now make a 64bit back trace
- while (VALID_STACK_ADDRESS64(supervisor, currFP, kernStackMin, kernStackMax))
- {
- // this is the address where caller lives in the user thread
- uint64_t caller = currFP + sizeof(uint64_t);
- if(!currFP) {
- currPC = 0;
- break;
- }
-
- if(bufferIndex >= bufferMaxIndex) {
- *count = bufferMaxIndex;
- return KERN_RESOURCE_SHORTAGE;
- }
+ }
- /* read our caller */
- kr = chudxnu_task_read(task, &currPC, caller, sizeof(uint64_t));
-
- if(kr != KERN_SUCCESS) {
- currPC = 0;
- break;
- }
-
- /*
- * retrive contents of the frame pointer and advance to the next stack
- * frame if it's valid
- */
- prevFP = 0;
- kr = chudxnu_task_read(task, &prevFP, currFP, sizeof(uint64_t));
-
- if(kr != KERN_SUCCESS) {
- currPC = 0;
- break;
- }
+ /*
+ * Order of preference for top of stack:
+ * 64 bit kernel state (not likely)
+ * 32 bit kernel state
+ * 64 bit user land state
+ * 32 bit user land state
+ */
+
+ if(regs64) {
+ currPC = regs64->isf.rip;
+ } else if(regs32) {
+ currPC = (uint64_t) regs32->eip;
+ } else if(u_regs64) {
+ currPC = u_regs64->isf.rip;
+ } else if(u_regs32) {
+ currPC = (uint64_t) u_regs32->eip;
+ }
- if(VALID_STACK_ADDRESS64(supervisor, prevFP, kernStackMin, kernStackMax)) {
- buffer[bufferIndex++] = currPC;
- prevPC = currPC;
- }
- if(prevFP < currFP) {
- break;
- } else {
- currFP = prevFP;
- }
- }
+ if(!currPC) {
+ /* no top of the stack, bail out */
+ return KERN_FAILURE;
+ }
- // append (rsp) on the bottom of the callstack
- kr = chudxnu_task_read(task, &rsp, (addr64_t) regs->isf.rsp, sizeof(uint64_t));
- if(kr == KERN_SUCCESS) {
- buffer[bufferIndex++] = rsp;
- }
- } else {
- /* !thread_is_64bit() */
- /* we grab 32 bit frames and silently promote them to 64 bits */
- uint32_t tmpWord = 0;
- x86_saved_state32_t *regs = NULL;
-
- if(user_only) {
- /* cant get user state for kernel threads */
- if(task == kernel_task || supervisor) {
- return 0x11;
- }
- regs = USER_REGS32(thread);
- } else {
- regs = saved_state32(current_cpu_datap()->cpu_int_state);
- }
+ bufferIndex = 0;
- if(regs == NULL) {
- *count = 0;
- return 0x12;
+ if(bufferMaxIndex < 1) {
+ *count = 0;
+ return KERN_RESOURCE_SHORTAGE;
+ }
+
+ /* backtrace kernel */
+ if(regs64) {
+ uint64_t rsp = 0ULL;
+
+ // backtrace the 64bit side.
+ kr = do_backtrace64(task, thread, regs64, callstack, &bufferIndex,
+ bufferMaxIndex, TRUE);
+
+ if(KERN_SUCCESS == chudxnu_kern_read(&rsp, (addr64_t) regs64->isf.rsp, sizeof(uint64_t)) &&
+ bufferIndex < bufferMaxIndex) {
+ callstack[bufferIndex++] = rsp;
}
- currPC = (uint64_t) regs->eip;
- currFP = (uint64_t) regs->ebp;
+ } else if(regs32) {
+ uint32_t esp = 0UL;
+
+ // backtrace the 32bit side.
+ kr = do_backtrace32(task, thread, regs32, callstack, &bufferIndex,
+ bufferMaxIndex, TRUE);
- bufferIndex = 0;
- //if(!supervisor)
- // bufferMaxIndex = bufferMaxIndex - 1; //allot space for saving %rsp on the stack for user callstacks
- if(bufferMaxIndex < 1) {
- *count = 0;
- return KERN_RESOURCE_SHORTAGE;
+ if(KERN_SUCCESS == chudxnu_kern_read(&esp, (addr64_t) regs32->uesp, sizeof(uint32_t)) &&
+ bufferIndex < bufferMaxIndex) {
+ callstack[bufferIndex++] = (uint64_t) esp;
}
- buffer[bufferIndex++] = currPC; // save EIP on the top of the stack
+ } else if(u_regs64) {
+ /* backtrace user land */
+ uint64_t rsp = 0ULL;
+
+ kr = do_backtrace64(task, thread, u_regs64, callstack, &bufferIndex,
+ bufferMaxIndex, FALSE);
- // now make a 64bit back trace from 32 bit stack frames
- while (VALID_STACK_ADDRESS(supervisor, currFP, kernStackMin, kernStackMax))
- {
- cframe_t *fp = (cframe_t *) (uint32_t) currFP;
+ if(KERN_SUCCESS == chudxnu_task_read(task, &rsp, (addr64_t) u_regs64->isf.rsp, sizeof(uint64_t)) &&
+ bufferIndex < bufferMaxIndex) {
+ callstack[bufferIndex++] = rsp;
+ }
- if(bufferIndex >= bufferMaxIndex) {
- *count = bufferMaxIndex;
- return KERN_RESOURCE_SHORTAGE;
- }
+ } else if(u_regs32) {
+ uint32_t esp = 0UL;
+
+ kr = do_backtrace32(task, thread, u_regs32, callstack, &bufferIndex,
+ bufferMaxIndex, FALSE);
- /* read the next frame */
- if(supervisor) {
- kr = chudxnu_kern_read(&tmpWord, (vm_offset_t) &fp->caller, sizeof(uint32_t));
- } else {
- kr = chudxnu_task_read(task, &tmpWord, (vm_offset_t) &fp->caller, sizeof(uint32_t));
- }
-
- if(kr != KERN_SUCCESS) {
- currPC = 0;
- break;
- }
-
- currPC = (uint64_t) tmpWord; // promote 32 bit address
-
- /*
- * retrive contents of the frame pointer and advance to the next stack
- * frame if it's valid
- */
- prevFP = 0;
- if(supervisor) {
- kr = chudxnu_kern_read(&tmpWord, (vm_offset_t)&fp->prev, sizeof(uint32_t));
- } else {
- kr = chudxnu_task_read(task, &tmpWord, (vm_offset_t)&fp->prev, sizeof(uint32_t));
- }
- prevFP = (uint64_t) tmpWord; // promote 32 bit address
-
- if(prevFP) {
- buffer[bufferIndex++] = currPC;
- prevPC = currPC;
- }
- if(prevFP < currFP) {
- break;
- } else {
- currFP = prevFP;
- }
+ if(KERN_SUCCESS == chudxnu_task_read(task, &esp, (addr64_t) u_regs32->uesp, sizeof(uint32_t)) &&
+ bufferIndex < bufferMaxIndex) {
+ callstack[bufferIndex++] = (uint64_t) esp;
}
+ }
- // append (esp) on the bottom of the callstack
- if(!supervisor) {
- kr = chudxnu_task_read(task, &tmpWord, regs->uesp, sizeof(uint32_t));
- if(kr == KERN_SUCCESS) {
- rsp = (uint64_t) tmpWord; // promote 32 bit address
- buffer[bufferIndex++] = rsp;
- }
- }
- }
-
*count = bufferIndex;
- return ret;
+ return kr;
}
+#pragma mark **** DEPRECATED ****
+
+// DEPRECATED
__private_extern__ kern_return_t
chudxnu_thread_get_callstack(
- thread_t thread,
- uint32_t *callStack,
- mach_msg_type_number_t *count,
- boolean_t user_only)
+ thread_t thread,
+ uint32_t *callStack,
+ mach_msg_type_number_t *count,
+ boolean_t user_only)
{
kern_return_t kr;
task_t task = thread->task;
uint32_t prevFP = 0;
uint32_t prevPC = 0;
uint32_t esp = 0;
- uint32_t kernStackMin = min_valid_stack_address();
- uint32_t kernStackMax = max_valid_stack_address();
+ uint32_t kernStackMin = thread->kernel_stack;
+ uint32_t kernStackMax = kernStackMin + KERNEL_STACK_SIZE;
uint32_t *buffer = callStack;
int bufferIndex = 0;
int bufferMaxIndex = *count;
boolean_t supervisor;
x86_saved_state32_t *regs = NULL;
-
+
if (user_only) {
/* We can't get user state for kernel threads */
if (task == kernel_task) {
} else {
regs = saved_state32(current_cpu_datap()->cpu_int_state);
}
-
+
if (regs == NULL) {
*count = 0;
return KERN_FAILURE;
return KERN_RESOURCE_SHORTAGE;
}
buffer[bufferIndex++] = currPC; //save PC in position 0.
-
+
// Now, fill buffer with stack backtraces.
while (VALID_STACK_ADDRESS(supervisor, currFP, kernStackMin, kernStackMax)) {
cframe_t *fp = (cframe_t *) currFP;
-
+
if (bufferIndex >= bufferMaxIndex) {
*count = bufferMaxIndex;
return KERN_RESOURCE_SHORTAGE;
}
-
+
if (supervisor) {
kr = chudxnu_kern_read(
- &currPC,
- (vm_offset_t) &fp->caller,
- sizeof(currPC));
+ &currPC,
+ (vm_offset_t) &fp->caller,
+ sizeof(currPC));
} else {
kr = chudxnu_task_read(
- task,
- &currPC,
- (vm_offset_t) &fp->caller,
- sizeof(currPC));
+ task,
+ &currPC,
+ (vm_offset_t) &fp->caller,
+ sizeof(currPC));
}
if (kr != KERN_SUCCESS)
break;
-
+
//retrieve the contents of the frame pointer
// and advance to the prev stack frame if it's valid
prevFP = 0;
if (supervisor) {
kr = chudxnu_kern_read(
- &prevFP,
- (vm_offset_t) &fp->prev,
- sizeof(prevFP));
+ &prevFP,
+ (vm_offset_t) &fp->prev,
+ sizeof(prevFP));
} else {
kr = chudxnu_task_read(
- task,
- &prevFP,
- (vm_offset_t) &fp->prev,
- sizeof(prevFP));
+ task,
+ &prevFP,
+ (vm_offset_t) &fp->prev,
+ sizeof(prevFP));
}
if (prevFP) {
buffer[bufferIndex++] = currPC;
currFP = prevFP;
}
}
-
+
// put the stack pointer on the bottom of the backtrace
if(!supervisor) {
kr = chudxnu_task_read(task, &esp, regs->uesp, sizeof(uint32_t));
buffer[bufferIndex++] = esp;
}
}
-
+
*count = bufferIndex;
return KERN_SUCCESS;
}
-
-#pragma mark **** DEPRECATED ****
-
-// DEPRECATED
-__private_extern__
-kern_return_t chudxnu_bind_current_thread(int cpu)
-{
- return chudxnu_bind_thread(current_thread(), cpu);
-}
-
-// DEPRECATED
-kern_return_t chudxnu_unbind_current_thread(void)
-{
- return chudxnu_unbind_thread(current_thread());
-}
-
-// DEPRECATED
-__private_extern__
-kern_return_t chudxnu_current_thread_get_callstack(
- uint32_t *callStack,
- mach_msg_type_number_t *count,
- boolean_t user_only)
-{
- return chudxnu_thread_get_callstack(
- current_thread(), callStack, count, user_only);
-}
-
-// DEPRECATED
-__private_extern__
-thread_t chudxnu_current_act(void)
-{
- return chudxnu_current_thread();
-}
projects / apple / xnu.git / blobdiff