* child_info.h (CURR_CHILD_INFO_MAGIC): Update.
(class child_info_fork): Remove stacksize, add stackaddr and guardsize members. * dcrt0.cc (child_info_fork::alloc_stack_hard_way): Partial rewrite to regenerate the stack exactly as in the parent. (child_info_fork::alloc_stack): Set stackaddr to 0, rather than stacksize. (dll_crt0_1): Check for stackaddr before changing the stack addresses in the TEB. * fork.cc (frok::child): Check for stackaddr here. (frok::parent): Set ch.stackaddr and ch.guardsize if not called from the main thread. * init.cc (dll_entry): Replace pointer to NT_TIB with pointer to TEB. Fix incorrectly changed address test before removing _my_tls. Set StackLimit to NULL on Windows 2000. Explain why. * miscfuncs.cc (struct thread_wrapper_arg): Store stackbase rather than stacksize, store commitaddr, remove guardsize. Store all pointers as char * for easier address arithmetic. (thread_wrapper): Rewrite to remove OS stack before calling thread function. Add lots of comments to explain what we do. (CygwinCreateThread): Reserve our own stack in case we got no application stack. Add comments. * ntdll.h (struct _TEB): Extend defintion up to DeallocationStack member. * thread.cc (pthread_attr::pthread_attr): Use "(size_t) -1" rather then 0xffffffff. * wincap.h (wincaps::has_stack_size_param_is_a_reservation): New element. * wincap.cc: Implement above element throughout.
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@@ -37,7 +37,7 @@ enum child_status
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#define EXEC_MAGIC_SIZE sizeof(child_info)
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/* Change this value if you get a message indicating that it is out-of-sync. */
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#define CURR_CHILD_INFO_MAGIC 0xe850717aU
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#define CURR_CHILD_INFO_MAGIC 0xbdf5842aU
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/* NOTE: Do not make gratuitous changes to the names or organization of the
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below class. The layout is checksummed to determine compatibility between
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@@ -80,10 +80,12 @@ class child_info_fork: public child_info
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{
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public:
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HANDLE forker_finished;// for synchronization with child
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DWORD stacksize; // size of parent stack
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jmp_buf jmp; // where child will jump to
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void *stackaddr; // address of parent stack
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void *stacktop; // location of top of parent stack
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void *stackbottom; // location of bottom of parent stack
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size_t guardsize; // size of POSIX guard region or (size_t) -1 if
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// user stack
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char filler[4];
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child_info_fork ();
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void handle_fork () __attribute__ ((regparm (1)));;
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