-
-
#ifdef LISP_FEATURE_SB_THREAD
#include <architecture/i386/table.h>
#include <i386/user_ldt.h>
#include <pthread.h>
#include <assert.h>
#include <stdlib.h>
+#include <stdio.h>
#ifdef LISP_FEATURE_SB_THREAD
#ifdef LISP_FEATURE_MACH_EXCEPTION_HANDLER
-void sigill_handler(int signal, siginfo_t *siginfo, void *void_context);
-void sigtrap_handler(int signal, siginfo_t *siginfo, void *void_context);
-void memory_fault_handler(int signal, siginfo_t *siginfo, void *void_context);
-
-/* exc_server handles mach exception messages from the kernel and
- * calls catch exception raise. We use the system-provided
- * mach_msg_server, which, I assume, calls exc_server in a loop.
- *
- */
-extern boolean_t exc_server();
+void sigill_handler(int signal, siginfo_t *siginfo, os_context_t *context);
+void sigtrap_handler(int signal, siginfo_t *siginfo, os_context_t *context);
+void memory_fault_handler(int signal, siginfo_t *siginfo,
+ os_context_t *context);
/* This executes in the faulting thread as part of the signal
* emulation. It is passed a context with the uc_mcontext field
* pointing to a valid block of memory. */
-void build_fake_signal_context(struct ucontext *context,
+void build_fake_signal_context(os_context_t *context,
x86_thread_state32_t *thread_state,
x86_float_state32_t *float_state) {
pthread_sigmask(0, NULL, &context->uc_sigmask);
- context->uc_mcontext->ss = *thread_state;
- context->uc_mcontext->fs = *float_state;
+ context->uc_mcontext->SS = *thread_state;
+ context->uc_mcontext->FS = *float_state;
}
/* This executes in the faulting thread as part of the signal
* emulation. It is effectively the inverse operation from above. */
void update_thread_state_from_context(x86_thread_state32_t *thread_state,
x86_float_state32_t *float_state,
- struct ucontext *context) {
- *thread_state = context->uc_mcontext->ss;
- *float_state = context->uc_mcontext->fs;
+ os_context_t *context) {
+ *thread_state = context->uc_mcontext->SS;
+ *float_state = context->uc_mcontext->FS;
pthread_sigmask(SIG_SETMASK, &context->uc_sigmask, NULL);
}
/* Modify a context to push new data on its stack. */
-void push_context(u32 data, x86_thread_state32_t *context)
+void push_context(u32 data, x86_thread_state32_t *thread_state)
{
u32 *stack_pointer;
- stack_pointer = (u32*) context->esp;
+ stack_pointer = (u32*) thread_state->ESP;
*(--stack_pointer) = data;
- context->esp = (unsigned int) stack_pointer;
+ thread_state->ESP = (unsigned int) stack_pointer;
}
-void align_context_stack(x86_thread_state32_t *context)
+void align_context_stack(x86_thread_state32_t *thread_state)
{
/* 16byte align the stack (provided that the stack is, as it
* should be, 4byte aligned. */
- while (context->esp & 15) push_context(0, context);
+ while (thread_state->ESP & 15) push_context(0, thread_state);
}
/* Stack allocation starts with a context that has a mod-4 ESP value
* EBP, pops EBP, and returns. */
asm("_stack_allocation_recover: movl %ebp, %esp; popl %ebp; ret;");
-void open_stack_allocation(x86_thread_state32_t *context)
+void open_stack_allocation(x86_thread_state32_t *thread_state)
{
void stack_allocation_recover(void);
- push_context(context->eip, context);
- push_context(context->ebp, context);
- context->ebp = context->esp;
- context->eip = (unsigned int) stack_allocation_recover;
+ push_context(thread_state->EIP, thread_state);
+ push_context(thread_state->EBP, thread_state);
+ thread_state->EBP = thread_state->ESP;
+ thread_state->EIP = (unsigned int) stack_allocation_recover;
- align_context_stack(context);
+ align_context_stack(thread_state);
}
/* Stack allocation of data starts with a context with a mod-16 ESP
* value and reserves some space on it by manipulating the ESP
* register. */
-void *stack_allocate(x86_thread_state32_t *context, size_t size)
+void *stack_allocate(x86_thread_state32_t *thread_state, size_t size)
{
/* round up size to 16byte multiple */
size = (size + 15) & -16;
- context->esp = ((u32)context->esp) - size;
+ thread_state->ESP = ((u32)thread_state->ESP) - size;
- return (void *)context->esp;
+ return (void *)thread_state->ESP;
}
/* Arranging to invoke a C function is tricky, as we have to assume
* alignment requirements. The simplest way to arrange this,
* actually, is to open a new stack allocation.
* WARNING!!! THIS DOES NOT PRESERVE REGISTERS! */
-void call_c_function_in_context(x86_thread_state32_t *context,
+void call_c_function_in_context(x86_thread_state32_t *thread_state,
void *function,
int nargs,
...)
u32 *stack_pointer;
/* Set up to restore stack on exit. */
- open_stack_allocation(context);
+ open_stack_allocation(thread_state);
/* Have to keep stack 16byte aligned on x86/darwin. */
for (i = (3 & -nargs); i; i--) {
- push_context(0, context);
+ push_context(0, thread_state);
}
- context->esp = ((u32)context->esp) - nargs * 4;
- stack_pointer = (u32 *)context->esp;
+ thread_state->ESP = ((u32)thread_state->ESP) - nargs * 4;
+ stack_pointer = (u32 *)thread_state->ESP;
va_start(ap, nargs);
for (i = 0; i < nargs; i++) {
- //push_context(va_arg(ap, u32), context);
+ //push_context(va_arg(ap, u32), thread_state);
stack_pointer[i] = va_arg(ap, u32);
}
va_end(ap);
- push_context(context->eip, context);
- context->eip = (unsigned int) function;
+ push_context(thread_state->EIP, thread_state);
+ thread_state->EIP = (unsigned int) function;
}
void signal_emulation_wrapper(x86_thread_state32_t *thread_state,
* context (and regs just for symmetry).
*/
- struct ucontext *context;
- struct mcontext *regs;
+ os_context_t *context;
+ mcontext_t *regs;
- context = (struct ucontext*) os_validate(0, sizeof(struct ucontext));
- regs = (struct mcontext*) os_validate(0, sizeof(struct mcontext));
+ context = (os_context_t*) os_validate(0, sizeof(os_context_t));
+ regs = (mcontext_t*) os_validate(0, sizeof(mcontext_t));
context->uc_mcontext = regs;
/* when BSD signals are fired, they mask they signals in sa_mask
build_fake_signal_context(context, thread_state, float_state);
- block_blockable_signals();
+ block_blockable_signals(0, 0);
handler(signal, siginfo, context);
update_thread_state_from_context(thread_state, float_state, context);
- os_invalidate((os_vm_address_t)context, sizeof(struct ucontext));
- os_invalidate((os_vm_address_t)regs, sizeof(struct mcontext));
+ os_invalidate((os_vm_address_t)context, sizeof(os_context_t));
+ os_invalidate((os_vm_address_t)regs, sizeof(mcontext_t));
/* Trap to restore the signal context. */
asm volatile ("movl %0, %%eax; movl %1, %%ebx; .long 0xffff0b0f"
/* Initialize the new state */
new_state = *thread_state;
open_stack_allocation(&new_state);
+ stack_allocate(&new_state, 256);
/* Save old state */
save_thread_state = (x86_thread_state32_t *)stack_allocate(&new_state, sizeof(*save_thread_state));
*save_thread_state = *thread_state;
}
#if defined DUMP_CONTEXT
-void dump_context(x86_thread_state32_t *context)
+void dump_context(x86_thread_state32_t *thread_state)
{
int i;
u32 *stack_pointer;
printf("eax: %08lx ecx: %08lx edx: %08lx ebx: %08lx\n",
- context->eax, context->ecx, context->edx, context->ebx);
+ thread_state->EAX, thread_state->ECX, thread_state->EDX, thread_state->EAX);
printf("esp: %08lx ebp: %08lx esi: %08lx edi: %08lx\n",
- context->esp, context->ebp, context->esi, context->edi);
+ thread_state->ESP, thread_state->EBP, thread_state->ESI, thread_state->EDI);
printf("eip: %08lx eflags: %08lx\n",
- context->eip, context->eflags);
+ thread_state->EIP, thread_state->EFLAGS);
printf("cs: %04hx ds: %04hx es: %04hx "
"ss: %04hx fs: %04hx gs: %04hx\n",
- context->cs, context->ds, context->es,
- context->ss, context->fs, context->gs);
-
- stack_pointer = (u32 *)context->esp;
+ thread_state->CS,
+ thread_state->DS,
+ thread_state->ES,
+ thread_state->SS,
+ thread_state->FS,
+ thread_state->GS);
+
+ stack_pointer = (u32 *)thread_state->ESP;
for (i = 0; i < 48; i+=4) {
printf("%08x: %08x %08x %08x %08x\n",
- context->esp + (i * 4),
+ thread_state->ESP + (i * 4),
stack_pointer[i],
stack_pointer[i+1],
stack_pointer[i+2],
#endif
void
-control_stack_exhausted_handler(int signal, siginfo_t *siginfo, void *void_context) {
- os_context_t *context = arch_os_get_context(&void_context);
+control_stack_exhausted_handler(int signal, siginfo_t *siginfo,
+ os_context_t *context) {
+ unblock_signals_in_context_and_maybe_warn(context);
arrange_return_to_lisp_function
- (context, SymbolFunction(CONTROL_STACK_EXHAUSTED_ERROR));
+ (context, StaticSymbolFunction(CONTROL_STACK_EXHAUSTED_ERROR));
}
void
-undefined_alien_handler(int signal, siginfo_t *siginfo, void *void_context) {
- os_context_t *context = arch_os_get_context(&void_context);
-
+undefined_alien_handler(int signal, siginfo_t *siginfo, os_context_t *context) {
arrange_return_to_lisp_function
- (context, SymbolFunction(UNDEFINED_ALIEN_VARIABLE_ERROR));
+ (context, StaticSymbolFunction(UNDEFINED_ALIEN_VARIABLE_ERROR));
}
kern_return_t
ret = KERN_INVALID_RIGHT;
break;
}
- /* Get vm_region info */
- region_addr = (vm_address_t)code_vector[1];
- info_count = VM_REGION_BASIC_INFO_COUNT;
- if ((ret = vm_region(mach_task_self(),
- ®ion_addr,
- ®ion_size,
- VM_REGION_BASIC_INFO,
- (vm_region_info_t)®ion_info,
- &info_count,
- ®ion_name)))
- lose("vm_region (VM_REGION_BASIC_INFO) failed failed %d\n", ret);
- /* Check if still protected */
- if ((region_info.protection & OS_VM_PROT_ALL) == 0) {
- /* KLUDGE:
- * If two threads fault on the same page, the protection
- * is cleared as the first thread runs memory_fault_handler.
- * Grep for "not marked as write-protected" in gencgc.c
- */
- ret = KERN_SUCCESS;
+ addr = (void*)code_vector[1];
+ /* Undefined alien */
+ if (os_trunc_to_page(addr) == undefined_alien_address) {
+ handler = undefined_alien_handler;
break;
}
- addr = (void*)code_vector[1];
/* At stack guard */
if (os_trunc_to_page(addr) == CONTROL_STACK_GUARD_PAGE(th)) {
- protect_control_stack_guard_page_thread(0, th);
- protect_control_stack_return_guard_page_thread(1, th);
+ lower_thread_control_stack_guard_page(th);
handler = control_stack_exhausted_handler;
break;
}
/* Return from stack guard */
if (os_trunc_to_page(addr) == CONTROL_STACK_RETURN_GUARD_PAGE(th)) {
- protect_control_stack_guard_page_thread(1, th);
- protect_control_stack_return_guard_page_thread(0, th);
- break;
- }
- /* Undefined alien */
- if (os_trunc_to_page(addr) == undefined_alien_address) {
- handler = undefined_alien_handler;
+ reset_thread_control_stack_guard_page(th);
break;
}
/* Regular memory fault */
break;
}
/* Check if UD2 instruction */
- if (*(unsigned short *)thread_state.eip != 0x0b0f) {
+ if (*(unsigned short *)thread_state.EIP != 0x0b0f) {
/* KLUDGE: There are two ways we could get here:
* 1) We're executing data and we've hit some truly
* illegal opcode, of which there are a few, see
*/
static mach_port_t last_thread;
static unsigned int last_eip;
- if (last_thread == thread && last_eip == thread_state.eip)
+ if (last_thread == thread && last_eip == thread_state.EIP)
ret = KERN_INVALID_RIGHT;
else
ret = KERN_SUCCESS;
last_thread = thread;
- last_eip = thread_state.eip;
+ last_eip = thread_state.EIP;
break;
}
/* Skip the trap code */
- thread_state.eip += 2;
+ thread_state.EIP += 2;
/* Return from handler? */
- if (*(unsigned short *)thread_state.eip == 0xffff) {
+ if (*(unsigned short *)thread_state.EIP == 0xffff) {
if ((ret = thread_set_state(thread,
x86_THREAD_STATE32,
- (thread_state_t)thread_state.eax,
+ (thread_state_t)thread_state.EAX,
x86_THREAD_STATE32_COUNT)) != KERN_SUCCESS)
lose("thread_set_state (x86_THREAD_STATE32) failed %d\n", ret);
if ((ret = thread_set_state(thread,
x86_FLOAT_STATE32,
- (thread_state_t)thread_state.ebx,
+ (thread_state_t)thread_state.EBX,
x86_FLOAT_STATE32_COUNT)) != KERN_SUCCESS)
lose("thread_set_state (x86_FLOAT_STATE32) failed %d\n", ret);
break;
siginfo.si_addr = addr;
call_handler_on_thread(thread, &thread_state, signal, &siginfo, handler);
}
- return ret;
-}
-void *
-mach_exception_handler(void *port)
-{
- mach_msg_server(exc_server, 2048, (mach_port_t) port, 0);
- /* mach_msg_server should never return, but it should dispatch mach
- * exceptions to our catch_exception_raise function
- */
- abort();
-}
-
-#endif
-
-#ifdef LISP_FEATURE_MACH_EXCEPTION_HANDLER
-
-/* Sets up the thread that will listen for mach exceptions. note that
- the exception handlers will be run on this thread. This is
- different from the BSD-style signal handling situation in which the
- signal handlers run in the relevant thread directly. */
-
-mach_port_t mach_exception_handler_port_set = MACH_PORT_NULL;
-
-pthread_t
-setup_mach_exception_handling_thread()
-{
- kern_return_t ret;
- pthread_t mach_exception_handling_thread = NULL;
- pthread_attr_t attr;
-
- /* allocate a mach_port for this process */
- ret = mach_port_allocate(mach_task_self(),
- MACH_PORT_RIGHT_PORT_SET,
- &mach_exception_handler_port_set);
-
- /* create the thread that will receive the mach exceptions */
-
- FSHOW((stderr, "Creating mach_exception_handler thread!\n"));
-
- pthread_attr_init(&attr);
- pthread_create(&mach_exception_handling_thread,
- &attr,
- mach_exception_handler,
- (void*) mach_exception_handler_port_set);
- pthread_attr_destroy(&attr);
-
- return mach_exception_handling_thread;
-}
-
-/* tell the kernel that we want EXC_BAD_ACCESS exceptions sent to the
- exception port (which is being listened to do by the mach
- exception handling thread). */
-kern_return_t
-mach_thread_init(mach_port_t thread_exception_port)
-{
- kern_return_t ret;
- /* allocate a named port for the thread */
-
- FSHOW((stderr, "Allocating mach port %x\n", thread_exception_port));
-
- ret = mach_port_allocate_name(mach_task_self(),
- MACH_PORT_RIGHT_RECEIVE,
- thread_exception_port);
- if (ret) {
- lose("mach_port_allocate_name failed with return_code %d\n", ret);
- }
-
- /* establish the right for the thread_exception_port to send messages */
- ret = mach_port_insert_right(mach_task_self(),
- thread_exception_port,
- thread_exception_port,
- MACH_MSG_TYPE_MAKE_SEND);
- if (ret) {
- lose("mach_port_insert_right failed with return_code %d\n", ret);
- }
-
- ret = thread_set_exception_ports(mach_thread_self(),
- EXC_MASK_BAD_ACCESS | EXC_MASK_BAD_INSTRUCTION,
- thread_exception_port,
- EXCEPTION_DEFAULT,
- THREAD_STATE_NONE);
- if (ret) {
- lose("thread_set_exception_port failed with return_code %d\n", ret);
- }
-
- ret = mach_port_move_member(mach_task_self(),
- thread_exception_port,
- mach_exception_handler_port_set);
- if (ret) {
- lose("mach_port_ failed with return_code %d\n", ret);
- }
+ mach_port_deallocate (current_mach_task, exception_port);
+ mach_port_deallocate (current_mach_task, thread);
+ mach_port_deallocate (current_mach_task, task);
return ret;
}
-void
-setup_mach_exceptions() {
- setup_mach_exception_handling_thread();
- mach_thread_init(THREAD_STRUCT_TO_EXCEPTION_PORT(all_threads));
-}
-
-pid_t
-mach_fork() {
- pid_t pid = fork();
- if (pid == 0) {
- setup_mach_exceptions();
- return pid;
- } else {
- return pid;
- }
-}
-
#endif
projects / sbcl.git / blobdiff