src/os_cpu/bsd_x86/vm/os_bsd_x86.cpp

rev 4810 : 8016697: PPC64 (part 5): Use stubs to implement safefetch
Summary: Implement Safefetch as stub routines. This reduces compiler and os dependencies.
Reviewed-by: twisti, kvn

*** 383,399 ****
  // From IA32 System Programming Guide
  enum {
    trap_page_fault = 0xE
  };
  
- extern "C" void Fetch32PFI () ;
- extern "C" void Fetch32Resume () ;
- #ifdef AMD64
- extern "C" void FetchNPFI () ;
- extern "C" void FetchNResume () ;
- #endif // AMD64
- 
  extern "C" JNIEXPORT int
  JVM_handle_bsd_signal(int sig,
                          siginfo_t* info,
                          void* ucVoid,
                          int abort_if_unrecognized) {
--- 383,392 ----
*** 452,471 ****
  
    //%note os_trap_1
    if (info != NULL && uc != NULL && thread != NULL) {
      pc = (address) os::Bsd::ucontext_get_pc(uc);
  
!     if (pc == (address) Fetch32PFI) {
!        uc->context_pc = intptr_t(Fetch32Resume) ;
!        return 1 ;
!     }
! #ifdef AMD64
!     if (pc == (address) FetchNPFI) {
!        uc->context_pc = intptr_t (FetchNResume) ;
!        return 1 ;
      }
- #endif // AMD64
  
      // Handle ALL stack overflow variations here
      if (sig == SIGSEGV || sig == SIGBUS) {
        address addr = (address) info->si_addr;
  
--- 445,458 ----
  
    //%note os_trap_1
    if (info != NULL && uc != NULL && thread != NULL) {
      pc = (address) os::Bsd::ucontext_get_pc(uc);
  
!     if (StubRoutines::is_safefetch_fault(pc)) {
!       uc->context_pc = intptr_t(StubRoutines::continuation_for_safefetch_fault(pc));
!       return 1;
      }
  
      // Handle ALL stack overflow variations here
      if (sig == SIGSEGV || sig == SIGBUS) {
        address addr = (address) info->si_addr;