src/runtime/arm64-linux-os.c

   1 /*
   2  * This is the ARM Linux incarnation of arch-dependent OS-dependent
   3  * routines. See also "linux-os.c".
   4  */
   5
   6 /*
   7  * This software is part of the SBCL system. See the README file for
   8  * more information.
   9  *
  10  * This software is derived from the CMU CL system, which was
  11  * written at Carnegie Mellon University and released into the
  12  * public domain. The software is in the public domain and is
  13  * provided with absolutely no warranty. See the COPYING and CREDITS
  14  * files for more information.
  15  */
  16
  17 #include <stdio.h>
  18 #include <sys/param.h>
  19 #include <sys/file.h>
  20 #include "sbcl.h"
  21 #include "./signal.h"
  22 #include "os.h"
  23 #include "arch.h"
  24 #include "globals.h"
  25 #include "interrupt.h"
  26 #include "interr.h"
  27 #include "lispregs.h"
  28 #include <sys/socket.h>
  29 #include <sys/utsname.h>
  30
  31 #include <sys/types.h>
  32 #include <signal.h>
  33 #include <sys/time.h>
  34 #include <sys/stat.h>
  35 #include <unistd.h>
  36 #include <errno.h>
  37
  38 #include "validate.h"
  39 size_t os_vm_page_size;
  40
  41
  42 int arch_os_thread_init(struct thread *thread) {
  43     stack_t sigstack;
  44 #ifdef LISP_FEATURE_SB_THREAD
  45 #ifdef LISP_FEATURE_GCC_TLS
  46     current_thread = thread;
  47 #else
  48     pthread_setspecific(specials,thread);
  49 #endif
  50 #endif
  51     /* Signal handlers are normally run on the main stack, but we've
  52      * swapped stacks, require that the control stack contain only
  53      * boxed data, and expands upwards while the C stack expands
  54      * downwards. */
  55     sigstack.ss_sp=((char *) thread)+dynamic_values_bytes;
  56     sigstack.ss_flags=0;
  57     sigstack.ss_size = 32*SIGSTKSZ;
  58     if(sigaltstack(&sigstack,0)<0)
  59         lose("Cannot sigaltstack: %s\n",strerror(errno));
  60
  61     return 1;                   /* success */
  62 }
  63 int arch_os_thread_cleanup(struct thread *thread) {
  64     return 1;                   /* success */
  65 }
  66
  67 os_context_register_t   *
  68 os_context_register_addr(os_context_t *context, int offset)
  69 {
  70     return (os_context_register_t *)&(context->uc_mcontext.regs[offset]);
  71 }
  72
  73 os_context_register_t *
  74 os_context_pc_addr(os_context_t *context)
  75 {
  76     return (os_context_register_t *)&(context->uc_mcontext.pc);
  77 }
  78
  79 os_context_register_t *
  80 os_context_lr_addr(os_context_t *context)
  81 {
  82     return os_context_register_addr(context, reg_LR);
  83 }
  84
  85 sigset_t *
  86 os_context_sigmask_addr(os_context_t *context)
  87 {
  88     return &(context->uc_sigmask);
  89 }
  90
  91 void
  92 os_restore_fp_control(os_context_t *context)
  93 {
  94     /* FIXME: Implement. */
  95 }
  96
  97 os_context_register_t   *
  98 os_context_float_register_addr(os_context_t *context, int offset)
  99 {
 100     /* KLUDGE: neither glibc nor the kernel can settle down on a name,
 101        the kernel used __reserved, now glibc uses __glibc_reserved1.
 102        Hardcode it until they make up their mind */
 103     return (os_context_register_t*)
 104         &((struct fpsimd_context *)((uintptr_t)&context->uc_mcontext + 288))->vregs[offset];
 105 }
 106
 107 void
 108 os_flush_icache(os_vm_address_t address, os_vm_size_t length)
 109 {
 110     os_vm_address_t end_address
 111         = (os_vm_address_t)(((uintptr_t) address) + length);
 112     __clear_cache(address, end_address);
 113 }