X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fx86-win32-os.c;h=fc076de1ff7e62fc7be25706c35423d849bcb2d7;hb=75b041baccb3c6126026c801685ac19d6c142fe0;hp=c07d1db982d3ad4490402459fa0e2ee33cb5b604;hpb=3df286f570d93bceaf806d125ffcd276f7ae26b8;p=sbcl.git

diff --git a/src/runtime/x86-win32-os.c b/src/runtime/x86-win32-os.c
index c07d1db..fc076de 100644
--- a/src/runtime/x86-win32-os.c
+++ b/src/runtime/x86-win32-os.c
@@ -42,46 +42,46 @@
 #include "validate.h"
 size_t os_vm_page_size;
 
-int arch_os_thread_init(struct thread *thread) {
+int arch_os_thread_init(struct thread *thread)
+{
     {
-	void *top_exception_frame;
+        void *top_exception_frame;
         void *cur_stack_end;
-	void *cur_stack_start;
+        void *cur_stack_start;
+        MEMORY_BASIC_INFORMATION stack_memory;
 
         asm volatile ("movl %%fs:0,%0": "=r" (top_exception_frame));
         asm volatile ("movl %%fs:4,%0": "=r" (cur_stack_end));
 
-	/*
-	 * Can't pull stack start from fs:4 or fs:8 or whatever,
-	 * because that's only what currently has memory behind
-	 * it from being used. Our basic options are to know,
-	 * a priori, what the stack size is (1 meg by default)
-	 * or to grub the default size out of the executable
-	 * header in memory by means of hardcoded addresses and
-	 * offsets.
-	 *
-	 * We'll just assume it's 1 megabyte. Easiest that way.
-	 */
-	cur_stack_start = cur_stack_end - 0x100000;
-
-	/*
-	 * We use top_exception_frame rather than cur_stack_end
-	 * to elide the last few (boring) stack entries at the
-	 * bottom of the backtrace.
-	 */
-	thread->control_stack_start = cur_stack_start;
+        /* Can't pull stack start from fs:4 or fs:8 or whatever,
+         * because that's only what currently has memory behind
+         * it from being used, so do a quick VirtualQuery() and
+         * grab the AllocationBase. -AB 2006/11/25
+         */
+
+        if (!VirtualQuery(&stack_memory, &stack_memory, sizeof(stack_memory))) {
+            fprintf(stderr, "VirtualQuery: 0x%lx.\n", GetLastError());
+            lose("Could not query stack memory information.");
+        }
+        cur_stack_start = stack_memory.AllocationBase;
+
+        /* We use top_exception_frame rather than cur_stack_end to
+         * elide the last few (boring) stack entries at the bottom of
+         * the backtrace.
+         */
+        thread->control_stack_start = cur_stack_start;
         thread->control_stack_end = top_exception_frame;
 
 #ifndef LISP_FEATURE_SB_THREAD
-	/*
-	 * Theoretically, threaded SBCL binds directly against
-	 * the thread structure for these values. We don't do
-	 * threads yet, but we'll probably do the same. We do
-	 * need to reset these, though, because they were
-	 * initialized based on the wrong stack space.
-	 */
-	SetSymbolValue(CONTROL_STACK_START,(lispobj)thread->control_stack_start,thread);
-	SetSymbolValue(CONTROL_STACK_END,(lispobj)thread->control_stack_end,thread);
+        /*
+         * Theoretically, threaded SBCL binds directly against
+         * the thread structure for these values. We don't do
+         * threads yet, but we'll probably do the same. We do
+         * need to reset these, though, because they were
+         * initialized based on the wrong stack space.
+         */
+        SetSymbolValue(CONTROL_STACK_START,(lispobj)thread->control_stack_start,thread);
+        SetSymbolValue(CONTROL_STACK_END,(lispobj)thread->control_stack_end,thread);
 #endif
     }