#include <sys/file.h>
#include <sys/types.h>
#include <unistd.h>
+#include <errno.h>
+#include "sbcl.h"
#include "./signal.h"
#include "os.h"
#include "arch.h"
#include "interrupt.h"
#include "interr.h"
#include "lispregs.h"
-#include "sbcl.h"
#include <sys/socket.h>
#include <sys/utsname.h>
#include <asm/ldt.h>
#include <linux/unistd.h>
#include <sys/mman.h>
+#include <linux/version.h>
#include "thread.h" /* dynamic_values_bytes */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
+#define user_desc modify_ldt_ldt_s
+#endif
+
_syscall3(int, modify_ldt, int, func, void *, ptr, unsigned long, bytecount );
#include "validate.h"
u32 local_ldt_copy[LDT_ENTRIES*LDT_ENTRY_SIZE/sizeof(u32)];
-/* XXX this could be conditionally compiled based on some
- * "debug-friendly" flag. But it doesn't really make stuff slower,
- * just the runtime gets fractionally larger */
+/* This is never actually called, but it's great for calling from gdb when
+ * users have thread-related problems that maintainers can't duplicate */
void debug_get_ldt()
{
printf("%d bytes in ldt: print/x local_ldt_copy\n", n);
}
-lispobj modify_ldt_lock; /* protect all calls to modify_ldt */
+volatile lispobj modify_ldt_lock; /* protect all calls to modify_ldt */
int arch_os_thread_init(struct thread *thread) {
stack_t sigstack;
#ifdef LISP_FEATURE_SB_THREAD
- /* this must be called from a function that has an exclusive lock
- * on all_threads
+ /* FIXME Lock ordering rules: all_threads_lock must usually be
+ * held when getting modify_ldt_lock
*/
- struct modify_ldt_ldt_s ldt_entry = {
+ struct user_desc ldt_entry = {
1, 0, 0, /* index, address, length filled in later */
1, MODIFY_LDT_CONTENTS_DATA, 0, 0, 0, 1
};
int n;
- get_spinlock(&modify_ldt_lock,thread);
+ /* thread->os_thread is not set yet*/
+ get_spinlock(&modify_ldt_lock,(int)thread);
n=modify_ldt(0,local_ldt_copy,sizeof local_ldt_copy);
/* get next free ldt entry */
modify_ldt_lock=0;
if(n<0) return 0;
+ pthread_setspecific(specials,thread);
#endif
#ifdef LISP_FEATURE_C_STACK_IS_CONTROL_STACK
/* Signal handlers are run on the control stack, so if it is exhausted
sigstack.ss_flags=0;
sigstack.ss_size = 32*SIGSTKSZ;
sigaltstack(&sigstack,0);
+ if(sigaltstack(&sigstack,0)<0) {
+ lose("Cannot sigaltstack: %s\n",strerror(errno));
+ }
#endif
return 1;
}
-/* if you can't do something like this (maybe because you're using a
- * register for thread base that is only available in Lisp code)
- * you'll just have to find_thread_by_pid(getpid())
- */
-struct thread *arch_os_get_current_thread() {
-#ifdef LISP_FEATURE_SB_THREAD
- register struct thread *me=0;
- if(all_threads)
- __asm__ ("movl %%fs:%c1,%0" : "=r" (me)
- : "i" (offsetof (struct thread,this)));
- return me;
-#else
- return all_threads;
-#endif
+struct thread *debug_get_fs() {
+ register u32 fs;
+ __asm__ __volatile__ ("movl %%fs,%0" : "=r" (fs) : );
+ return fs;
}
/* free any arch/os-specific resources used by thread, which is now
*/
int arch_os_thread_cleanup(struct thread *thread) {
- struct modify_ldt_ldt_s ldt_entry = {
+ struct user_desc ldt_entry = {
0, 0, 0,
0, MODIFY_LDT_CONTENTS_DATA, 0, 0, 0, 0
};
os_context_register_addr(os_context_t *context, int offset)
{
switch(offset) {
- case 0: return &context->uc_mcontext.gregs[11]; /* EAX */
- case 2: return &context->uc_mcontext.gregs[10]; /* ECX */
- case 4: return &context->uc_mcontext.gregs[9]; /* EDX */
- case 6: return &context->uc_mcontext.gregs[8]; /* EBX */
- case 8: return &context->uc_mcontext.gregs[7]; /* ESP */
- case 10: return &context->uc_mcontext.gregs[6]; /* EBP */
- case 12: return &context->uc_mcontext.gregs[5]; /* ESI */
- case 14: return &context->uc_mcontext.gregs[4]; /* EDI */
+ case reg_EAX: return &context->uc_mcontext.gregs[11];
+ case reg_ECX: return &context->uc_mcontext.gregs[10];
+ case reg_EDX: return &context->uc_mcontext.gregs[9];
+ case reg_EBX: return &context->uc_mcontext.gregs[8];
+ case reg_ESP: return &context->uc_mcontext.gregs[7];
+ case reg_EBP: return &context->uc_mcontext.gregs[6];
+ case reg_ESI: return &context->uc_mcontext.gregs[5];
+ case reg_EDI: return &context->uc_mcontext.gregs[4];
default: return 0;
}
return &context->uc_mcontext.gregs[offset];