src/runtime/ppc-bsd-os.c

   1 #include <signal.h>
   2 #include <machine/cpu.h>
   3 #include "sbcl.h"
   4 #include "runtime.h"
   5 #include "thread.h"
   6
   7
   8 int *
   9 os_context_register_addr(os_context_t *context, int offset)
  10 {
  11     return &context->uc_mcontext.__gregs[offset];
  12 }
  13
  14 int *
  15 os_context_sp_addr(os_context_t *context)
  16 {
  17     return &(_UC_MACHINE_SP(context));
  18 }
  19
  20
  21 int *
  22 os_context_pc_addr(os_context_t *context)
  23 {
  24     return &(_UC_MACHINE_PC(context));
  25 }
  26
  27 int *
  28 os_context_lr_addr(os_context_t *context)
  29 {
  30     return &context->uc_mcontext.__gregs[_REG_LR];
  31 }
  32
  33 /* FIXME: If this can be a no-op on BSD/x86, then it
  34  * deserves a more precise name.
  35  *
  36  * (Perhaps os_prepare_data_area_to_be_executed()?) */
  37 void
  38 os_flush_icache(os_vm_address_t address, os_vm_size_t length)
  39 {
  40    ppc_flush_icache(address, length);
  41 }
  42
  43 int arch_os_thread_init(struct thread *thread) {
  44
  45 #ifdef LISP_FEATURE_C_STACK_IS_CONTROL_STACK
  46     stack_t sigstack;
  47
  48     /* Signal handlers are run on the control stack, so if it is exhausted
  49      * we had better use an alternate stack for whatever signal tells us
  50      * we've exhausted it */
  51     sigstack.ss_sp=((void *) thread)+dynamic_values_bytes;
  52     sigstack.ss_flags=0;
  53     sigstack.ss_size = 32*SIGSTKSZ;
  54     sigaltstack(&sigstack,0);
  55 #endif
  56
  57     return 1;                  /* success */
  58 }
  59
  60 int arch_os_thread_cleanup(struct thread *thread) {
  61
  62     return 1;                  /* success */
  63 }