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glibc  2.9
Defines | Functions
setup-thread.c File Reference
#include <mach.h>
#include <thread_state.h>
#include <string.h>
#include <mach/machine/vm_param.h>
#include "sysdep.h"

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Defines

#define STACK_SIZE   (16 * 1024 * 1024) /* 16MB, arbitrary. */

Functions

kern_return_t __mach_setup_thread (task_t task, thread_t thread, void *pc, vm_address_t *stack_base, vm_size_t *stack_size)

Define Documentation

#define STACK_SIZE   (16 * 1024 * 1024) /* 16MB, arbitrary. */

Definition at line 25 of file setup-thread.c.


Function Documentation

kern_return_t __mach_setup_thread ( task_t  task,
thread_t  thread,
void *  pc,
vm_address_t *  stack_base,
vm_size_t *  stack_size 
)

Definition at line 36 of file setup-thread.c.

{
  kern_return_t error;
  struct machine_thread_state ts;
  mach_msg_type_number_t tssize = MACHINE_THREAD_STATE_COUNT;
  vm_address_t stack;
  vm_size_t size;
  int anywhere;

  size = stack_size ? *stack_size ? : STACK_SIZE : STACK_SIZE;
  stack = stack_base ? *stack_base ? : 0 : 0;
  anywhere = !stack_base || !*stack_base;

  error = __vm_allocate (task, &stack, size + __vm_page_size, anywhere);
  if (error)
    return error;

  if (stack_size)
    *stack_size = size;

  memset (&ts, 0, sizeof (ts));
  MACHINE_THREAD_STATE_SET_PC (&ts, pc);
#ifdef STACK_GROWTH_DOWN
  if (stack_base)
    *stack_base = stack + __vm_page_size;
  ts.SP = stack + __vm_page_size + size;
#elif defined (STACK_GROWTH_UP)
  if (stack_base)
    *stack_base = stack;
  ts.SP = stack;
  stack += size;
#else
  #error stack direction unknown
#endif

  /* Create the red zone.  */
  if (error = __vm_protect (task, stack, __vm_page_size, 0, VM_PROT_NONE))
    return error;

  return __thread_set_state (thread, MACHINE_THREAD_STATE_FLAVOR,
                          (natural_t *) &ts, tssize);
}

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