src/runtime/x86-win32-os.c

   1 /*
   2  * The x86 Win32 incarnation of arch-dependent OS-dependent routines.
   3  * See also "win32-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 <stddef.h>
  19 #include <sys/param.h>
  20 #include <sys/file.h>
  21 #include <sys/types.h>
  22 #include <unistd.h>
  23 #include <errno.h>
  24
  25 #include "os.h"
  26 #include "arch.h"
  27 #include "globals.h"
  28 #include "interrupt.h"
  29 #include "interr.h"
  30 #include "lispregs.h"
  31 #include "sbcl.h"
  32
  33 #include <sys/types.h>
  34 #include "runtime.h"
  35 #include <sys/time.h>
  36 #include <sys/stat.h>
  37 #include <unistd.h>
  38 #include "thread.h"             /* dynamic_values_bytes */
  39 #include "cpputil.h"            /* PTR_ALIGN... */
  40
  41 #include "validate.h"
  42
  43 int arch_os_thread_init(struct thread *thread)
  44 {
  45     {
  46         void *top_exception_frame;
  47         void *cur_stack_end;
  48         void *cur_stack_start;
  49         MEMORY_BASIC_INFORMATION stack_memory;
  50
  51         asm volatile ("movl %%fs:0,%0": "=r" (top_exception_frame));
  52         asm volatile ("movl %%fs:4,%0": "=r" (cur_stack_end));
  53
  54         /* Can't pull stack start from fs:4 or fs:8 or whatever,
  55          * because that's only what currently has memory behind
  56          * it from being used, so do a quick VirtualQuery() and
  57          * grab the AllocationBase. -AB 2006/11/25
  58          */
  59
  60         if (!VirtualQuery(&stack_memory, &stack_memory, sizeof(stack_memory))) {
  61             fprintf(stderr, "VirtualQuery: 0x%lx.\n", GetLastError());
  62             lose("Could not query stack memory information.");
  63         }
  64
  65         cur_stack_start = stack_memory.AllocationBase
  66             /* Kludge: Elide SBCL's guard page from the range.  (The
  67              * real solution is to not establish SBCL's guard page in
  68              * the first place.  The trick will be to find a good time
  69              * at which to re-enable the Windows guard page when
  70              * returning from it though.) */
  71             + os_vm_page_size;
  72
  73         /* We use top_exception_frame rather than cur_stack_end to
  74          * elide the last few (boring) stack entries at the bottom of
  75          * the backtrace.
  76          */
  77         thread->control_stack_start = cur_stack_start;
  78         thread->control_stack_end = top_exception_frame;
  79
  80 #ifndef LISP_FEATURE_SB_THREAD
  81         /*
  82          * Theoretically, threaded SBCL binds directly against
  83          * the thread structure for these values. We don't do
  84          * threads yet, but we'll probably do the same. We do
  85          * need to reset these, though, because they were
  86          * initialized based on the wrong stack space.
  87          */
  88         SetSymbolValue(CONTROL_STACK_START,(lispobj)thread->control_stack_start,thread);
  89         SetSymbolValue(CONTROL_STACK_END,(lispobj)thread->control_stack_end,thread);
  90 #endif
  91     }
  92
  93 #ifdef LISP_FEATURE_SB_THREAD
  94     TlsSetValue(OUR_TLS_INDEX,thread);
  95 #endif
  96     return 1;
  97 }
  98
  99 /* free any arch/os-specific resources used by thread, which is now
 100  * defunct.  Not called on live threads
 101  */
 102
 103 int arch_os_thread_cleanup(struct thread *thread) {
 104     return 0;
 105 }
 106
 107 #if defined(LISP_FEATURE_SB_THREAD)
 108 sigset_t *os_context_sigmask_addr(os_context_t *context)
 109 {
 110   return &context->sigmask;
 111 }
 112 #endif
 113
 114 os_context_register_t *
 115 os_context_register_addr(os_context_t *context, int offset)
 116 {
 117     static const size_t offsets[8] = {
 118         offsetof(CONTEXT,Eax),
 119         offsetof(CONTEXT,Ecx),
 120         offsetof(CONTEXT,Edx),
 121         offsetof(CONTEXT,Ebx),
 122         offsetof(CONTEXT,Esp),
 123         offsetof(CONTEXT,Ebp),
 124         offsetof(CONTEXT,Esi),
 125         offsetof(CONTEXT,Edi),
 126     };
 127     return
 128         (offset >= 0 && offset < 16) ?
 129         ((void*)(context->win32_context)) + offsets[offset>>1]  : 0;
 130 }
 131
 132 os_context_register_t *
 133 os_context_pc_addr(os_context_t *context)
 134 {
 135     return (void*)&context->win32_context->Eip; /*  REG_EIP */
 136 }
 137
 138 os_context_register_t *
 139 os_context_sp_addr(os_context_t *context)
 140 {
 141     return (void*)&context->win32_context->Esp; /* REG_UESP */
 142 }
 143
 144 os_context_register_t *
 145 os_context_fp_addr(os_context_t *context)
 146 {
 147     return (void*)&context->win32_context->Ebp; /* REG_EBP */
 148 }
 149
 150 unsigned long
 151 os_context_fp_control(os_context_t *context)
 152 {
 153     return ((((context->win32_context->FloatSave.ControlWord) & 0xffff) ^ 0x3f) |
 154             (((context->win32_context->FloatSave.StatusWord) & 0xffff) << 16));
 155 }
 156
 157 void
 158 os_restore_fp_control(os_context_t *context)
 159 {
 160     asm ("fldcw %0" : : "m" (context->win32_context->FloatSave.ControlWord));
 161 }
 162
 163 os_context_register_t *
 164 os_context_float_register_addr(os_context_t *context, int offset)
 165 {
 166     return (os_context_register_t*)&context->win32_context->FloatSave.RegisterArea[offset];
 167 }
 168 void
 169 os_flush_icache(os_vm_address_t address, os_vm_size_t length)
 170 {
 171 }