#include <signal.h>
+#include <stdio.h>
+#include "sbcl.h"
#include "runtime.h"
-#include "target-os.h"
+#include "thread.h"
+
+
+#ifdef LISP_FEATURE_SB_THREAD
+#ifdef LISP_FEATURE_DARWIN
+#include <architecture/i386/table.h>
+#include <i386/user_ldt.h>
+#include <mach/mach_init.h>
+#else
+#include <machine/segments.h>
+#include <machine/sysarch.h>
+#endif /* LISP_FEATURE_DARWIN */
+#endif
+
+#if defined(LISP_FEATURE_FREEBSD)
+#include "machine/npx.h"
+#endif
+
+#if defined(LISP_FEATURE_OPENBSD)
+#include <machine/npx.h>
+#include <stddef.h>
+#include "openbsd-sigcontext.h"
+#ifdef OS_OPENBSD_FPSTATE_IN_SIGFRAME
+# include <machine/frame.h>
+#endif
+#endif
/* KLUDGE: There is strong family resemblance in the signal context
* stuff in FreeBSD and OpenBSD, but in detail they're different in
* almost every line of code. It would be nice to find some way to
* factor out the commonality better; failing that, it might be best
- * just to split this generic-BSD code into one variant for each BSD.
+ * just to split this generic-BSD code into one variant for each BSD.
*
* KLUDGE II: this split has begun with the addition of the Darwin BSD
* flavour, with the cross-architecture complications that this
* entails; unfortunately, currently the situation is worse, not
* better, than in the above paragraph. */
-
+
+#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(LISP_FEATURE_DARWIN)
+int *
+os_context_register_addr(os_context_t *context, int offset)
+{
+ switch(offset) {
+ case 0:
+ return (int *)CONTEXT_ADDR_FROM_STEM(eax);
+ case 2:
+ return (int *)CONTEXT_ADDR_FROM_STEM(ecx);
+ case 4:
+ return (int *)CONTEXT_ADDR_FROM_STEM(edx);
+ case 6:
+ return (int *)CONTEXT_ADDR_FROM_STEM(ebx);
+ case 8:
+ return (int *)CONTEXT_ADDR_FROM_STEM(esp);
+ case 10:
+ return (int *)CONTEXT_ADDR_FROM_STEM(ebp);
+ case 12:
+ return (int *)CONTEXT_ADDR_FROM_STEM(esi);
+ case 14:
+ return (int *)CONTEXT_ADDR_FROM_STEM(edi);
+ default:
+ return 0;
+ }
+}
+
+int *
+os_context_sp_addr(os_context_t *context)
+{
+ return (int *)CONTEXT_ADDR_FROM_STEM(esp);
+}
+
+#endif /* __FreeBSD__ || __OpenBSD__ */
+
+#ifdef __NetBSD__
int *
os_context_register_addr(os_context_t *context, int offset)
{
switch(offset) {
case 0:
- return CONTEXT_ADDR_FROM_STEM(eax);
+ return CONTEXT_ADDR_FROM_STEM(EAX);
case 2:
- return CONTEXT_ADDR_FROM_STEM(ecx);
+ return CONTEXT_ADDR_FROM_STEM(ECX);
case 4:
- return CONTEXT_ADDR_FROM_STEM(edx);
+ return CONTEXT_ADDR_FROM_STEM(EDX);
case 6:
- return CONTEXT_ADDR_FROM_STEM(ebx);
+ return CONTEXT_ADDR_FROM_STEM(EBX);
case 8:
- return CONTEXT_ADDR_FROM_STEM(esp);
+ return CONTEXT_ADDR_FROM_STEM(ESP);
case 10:
- return CONTEXT_ADDR_FROM_STEM(ebp);
+ return CONTEXT_ADDR_FROM_STEM(EBP);
case 12:
- return CONTEXT_ADDR_FROM_STEM(esi);
+ return CONTEXT_ADDR_FROM_STEM(ESI);
case 14:
- return CONTEXT_ADDR_FROM_STEM(edi);
+ return CONTEXT_ADDR_FROM_STEM(EDI);
+ case 16:
+ return CONTEXT_ADDR_FROM_STEM(UESP);
default:
- return 0;
+ return 0;
}
}
int *
os_context_sp_addr(os_context_t *context)
{
- return CONTEXT_ADDR_FROM_STEM(esp);
+ return &(_UC_MACHINE_SP(context));
}
+#endif /* __NetBSD__ */
-/* FIXME: If this can be a no-op on BSD/x86, then it
+int *os_context_pc_addr(os_context_t *context)
+{
+#if defined __FreeBSD__
+ return CONTEXT_ADDR_FROM_STEM(eip);
+#elif defined __OpenBSD__
+ return CONTEXT_ADDR_FROM_STEM(pc);
+#elif defined __NetBSD__
+ return CONTEXT_ADDR_FROM_STEM(EIP);
+#elif defined(LISP_FEATURE_DARWIN) && defined(LISP_FEATURE_X86)
+ return (int *)CONTEXT_ADDR_FROM_STEM(eip);
+#elif defined LISP_FEATURE_DARWIN
+ return &context->uc_mcontext->ss.srr0;
+#else
+#error unsupported BSD variant
+#endif
+}
+
+/* FIXME: If this can be a no-op on BSD/x86, then it
* deserves a more precise name.
*
* (Perhaps os_prepare_data_area_to_be_executed()?) */
os_flush_icache(os_vm_address_t address, os_vm_size_t length)
{
}
+
+/* Note: the Darwin versions of arch_os_thread_init found in
+ * x86-darwin-os.c
+*/
+#if !defined(LISP_FEATURE_DARWIN)
+
+#ifdef LISP_FEATURE_SB_THREAD
+
+void set_data_desc_size(struct segment_descriptor* desc, unsigned long size)
+{
+ desc->sd_lolimit = (size - 1) & 0xffff;
+ desc->sd_hilimit = ((size - 1) >> 16) &0xf;
+}
+
+void set_data_desc_addr(struct segment_descriptor* desc, void* addr)
+{
+ desc->sd_lobase = (unsigned int)addr & 0xffffff;
+ desc->sd_hibase = ((unsigned int)addr & 0xff000000) >> 24;
+}
+
+#endif
+
+#ifdef LISP_FEATURE_SB_THREAD
+void
+arch_os_load_ldt(struct thread *thread)
+{
+ int sel = LSEL(thread->tls_cookie, SEL_UPL);
+ unsigned int fs = rfs();
+
+ /* Load FS only if it's necessary. Modifying a selector
+ * causes privilege checking and it takes long time. */
+ if (fs != sel)
+ load_fs(sel);
+}
+#endif
+
+int arch_os_thread_init(struct thread *thread) {
+
+#ifdef LISP_FEATURE_SB_THREAD
+ int n;
+
+ struct segment_descriptor ldt_entry = { 0, 0, SDT_MEMRW, SEL_UPL, 1,
+ 0, 0, 1, 0, 0 };
+
+ set_data_desc_addr(&ldt_entry, thread);
+ set_data_desc_size(&ldt_entry, dynamic_values_bytes);
+
+ n = i386_set_ldt(LDT_AUTO_ALLOC, (union descriptor*) &ldt_entry, 1);
+ if (n < 0) {
+ perror("i386_set_ldt");
+ lose("unexpected i386_set_ldt(..) failure\n");
+ }
+ FSHOW_SIGNAL((stderr, "/ TLS: Allocated LDT %x\n", n));
+ thread->tls_cookie=n;
+ arch_os_load_ldt(thread);
+
+#ifdef LISP_FEATURE_GCC_TLS
+ current_thread = thread;
+#else
+ pthread_setspecific(specials,thread);
+#endif
+#endif
+
+#ifdef LISP_FEATURE_SB_SAFEPOINT
+ thread->selfptr = thread;
+#endif
+
+#ifdef LISP_FEATURE_C_STACK_IS_CONTROL_STACK
+ stack_t sigstack;
+
+ /* Signal handlers are run on the control stack, so if it is exhausted
+ * we had better use an alternate stack for whatever signal tells us
+ * we've exhausted it */
+ sigstack.ss_sp=((void *) thread)+dynamic_values_bytes;
+ sigstack.ss_flags=0;
+ sigstack.ss_size = 32*SIGSTKSZ;
+ sigaltstack(&sigstack,0);
+#endif
+
+ return 1; /* success */
+}
+
+int arch_os_thread_cleanup(struct thread *thread) {
+
+#if defined(LISP_FEATURE_SB_THREAD)
+ int n = thread->tls_cookie;
+
+ /* Set the %%fs register back to 0 and free the ldt by setting it
+ * to NULL.
+ */
+ FSHOW_SIGNAL((stderr, "/ TLS: Freeing LDT %x\n", n));
+
+ __asm__ __volatile__ ("mov %0, %%fs" : : "r"(0));
+ i386_set_ldt(n, NULL, 1);
+#endif
+
+ return 1; /* success */
+}
+
+#endif /* !LISP_FEATURE_DARWIN */
+
+#if defined(LISP_FEATURE_FREEBSD)
+#if defined(LISP_FEATURE_RESTORE_TLS_SEGMENT_REGISTER_FROM_CONTEXT)
+void
+os_restore_tls_segment_register(os_context_t *context)
+{
+ load_fs(context->uc_mcontext.mc_fs);
+}
+#endif
+
+void
+os_restore_fp_control(os_context_t *context)
+{
+ /* FPU state is saved per context on post-KSE systems.
+ * On earlier systems, it is shared in a whole process.
+ */
+#if defined(__FreeBSD_version) && __FreeBSD_version >= 500040
+ struct envxmm *ex = (struct envxmm *)(context->uc_mcontext.mc_fpstate);
+ __asm__ __volatile__ ("fldcw %0" : : "m" (ex->en_cw));
+#endif
+#if defined(LISP_FEATURE_RESTORE_TLS_SEGMENT_REGISTER_FROM_CONTEXT)
+ /* Calling this function here may not be good idea. Or rename
+ * function name os_restore_fp_control to os_restore_context or
+ * so, to match the behavior? */
+ os_restore_tls_segment_register(context);
+#endif
+}
+#endif
+
+#if defined(LISP_FEATURE_OPENBSD)
+void
+os_restore_fp_control(os_context_t *context)
+{
+#ifdef OS_OPENBSD_FPSTATE_IN_SIGFRAME
+ struct sigframe *frame = (struct sigframe *)((char*)context -
+ offsetof(struct sigframe, sf_sc));
+ union savefpu *fpu = frame->sf_fpstate;
+#elif defined(OS_OPENBSD_FPSTATE_IN_SIGCONTEXT)
+ union savefpu *fpu = context->sc_fpstate;
+#endif
+
+ if (openbsd_use_fxsave)
+ __asm__ __volatile__ ("fldcw %0" : : "m" (fpu->sv_xmm.sv_env.en_cw));
+ else
+ __asm__ __volatile__ ("fldcw %0" : : "m" (fpu->sv_87.sv_env.en_cw));
+}
+#endif
projects / sbcl.git / blobdiff