/*
- * OS-dependent routines for FreeBSD (and could maybe be extended to all BSD?)
+ * OS-dependent routines for BSD-ish systems
*
* This file (along with os.h) exports an OS-independent interface to
* the operating system VM facilities. This interface looks a lot like
* files for more information.
*/
-/*
- * $Header$
- */
-
#include <stdio.h>
#include <sys/param.h>
#include <sys/file.h>
#include "arch.h"
#include "globals.h"
#include "interrupt.h"
+#include "interr.h"
#include "lispregs.h"
#include "sbcl.h"
+#include "thread.h"
#include <sys/types.h>
#include <signal.h>
/* #include <sys/sysinfo.h> */
-#include <sys/proc.h>
#include "validate.h"
-vm_size_t os_vm_page_size;
-#if defined GENCGC
-#include "gencgc.h"
-#endif
-
-/* The different BSD variants have diverged in exactly where they
- * store signal context information, but at least they tend to use the
- * same stems to name the structure fields, so by using this macro we
- * can share a fair amount of code between different variants. */
-#if defined __FreeBSD__
-#define CONTEXT_ADDR_FROM_STEM(stem) &context->uc_mcontext.mc_ ## stem
-#elif defined __OpenBSD__
-#define CONTEXT_ADDR_FROM_STEM(stem) &context->sc_ ## stem
-#else
-#error unsupported BSD variant
-#endif
\f
-void
-os_init(void)
-{
- os_vm_page_size = getpagesize();
-}
+vm_size_t os_vm_page_size;
-/* 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. */
-
-int *
-os_context_register_addr(os_context_t *context, int offset)
+void os_init(void)
{
- switch(offset) {
- case 0:
- return CONTEXT_ADDR_FROM_STEM(eax);
- case 2:
- return CONTEXT_ADDR_FROM_STEM(ecx);
- case 4:
- return CONTEXT_ADDR_FROM_STEM(edx);
- case 6:
- return CONTEXT_ADDR_FROM_STEM(ebx);
- case 8:
- return CONTEXT_ADDR_FROM_STEM(esp);
- case 10:
- return CONTEXT_ADDR_FROM_STEM(ebp);
- case 12:
- return CONTEXT_ADDR_FROM_STEM(esi);
- case 14:
- return CONTEXT_ADDR_FROM_STEM(edi);
- default:
- return 0;
- }
+ os_vm_page_size = getpagesize();
}
-int *
-os_context_pc_addr(os_context_t *context)
+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 DARWIN
+ return &context->uc_mcontext->ss.srr0;
#else
#error unsupported BSD variant
#endif
}
-int *
-os_context_sp_addr(os_context_t *context)
-{
- return CONTEXT_ADDR_FROM_STEM(esp);
-}
-
sigset_t *
os_context_sigmask_addr(os_context_t *context)
{
/* (Unlike most of the other context fields that we access, the
* signal mask field is a field of the basic, outermost context
* struct itself both in FreeBSD 4.0 and in OpenBSD 2.6.) */
-#if defined __FreeBSD__
+#if defined __FreeBSD__ || defined DARWIN
return &context->uc_sigmask;
#elif defined __OpenBSD__
return &context->sc_mask;
}
void
-os_flush_icache(os_vm_address_t address, os_vm_size_t length)
-{
-}
-
-void
os_protect(os_vm_address_t address, os_vm_size_t length, os_vm_prot_t prot)
{
if (mprotect(address, length, prot) == -1) {
boolean
is_valid_lisp_addr(os_vm_address_t addr)
{
- return in_range_p(addr, READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE)
- || in_range_p(addr, STATIC_SPACE_START , STATIC_SPACE_SIZE )
- || in_range_p(addr, DYNAMIC_0_SPACE_START, DYNAMIC_SPACE_SIZE )
- || in_range_p(addr, DYNAMIC_1_SPACE_START, DYNAMIC_SPACE_SIZE )
- || in_range_p(addr, CONTROL_STACK_START , CONTROL_STACK_SIZE )
- || in_range_p(addr, BINDING_STACK_START , BINDING_STACK_SIZE );
+ struct thread *th;
+ if(in_range_p(addr, READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE) ||
+ in_range_p(addr, STATIC_SPACE_START , STATIC_SPACE_SIZE) ||
+ in_range_p(addr, DYNAMIC_SPACE_START , DYNAMIC_SPACE_SIZE))
+ return 1;
+ for_each_thread(th) {
+ if((th->control_stack_start <= addr) && (addr < th->control_stack_end))
+ return 1;
+ if(in_range_p(addr, th->binding_stack_start, BINDING_STACK_SIZE))
+ return 1;
+ }
+ return 0;
}
\f
/*
* any OS-dependent special low-level handling for signals
*/
-#if !defined GENCGC
-
-void
-os_install_interrupt_handlers(void)
-{}
-
-#else
+#if defined LISP_FEATURE_GENCGC
/*
* The GENCGC needs to be hooked into whatever signal is raised for
void *fault_addr = siginfo->si_addr;
#elif defined __OpenBSD__
void *fault_addr = siginfo->si_addr;
+#elif defined DARWIN
+ void *fault_addr = siginfo->si_addr;
#else
#error unsupported BSD variant
#endif
- if (!gencgc_handle_wp_violation(fault_addr)) {
- interrupt_handle_now(signal, siginfo, void_context);
- }
+ os_context_t *context = arch_os_get_context(&void_context);
+ if (!gencgc_handle_wp_violation(fault_addr))
+ if(!handle_control_stack_guard_triggered(context,fault_addr))
+ /* FIXME is this context or void_context? not that it */
+ /* makes a difference currently except on linux/sparc */
+ interrupt_handle_now(signal, siginfo, void_context);
}
void
os_install_interrupt_handlers(void)
{
-#if defined __FreeBSD__
- interrupt_install_low_level_handler(SIGBUS, memory_fault_handler);
-#elif defined __OpenBSD__
- interrupt_install_low_level_handler(SIGSEGV, memory_fault_handler);
+ SHOW("os_install_interrupt_handlers()/bsd-os/defined(GENCGC)");
+ undoably_install_low_level_interrupt_handler(SIG_MEMORY_FAULT,
+ memory_fault_handler);
+ SHOW("leaving os_install_interrupt_handlers()");
+}
+
+#else /* Currently Darwin only */
+
+static void
+sigsegv_handler(int signal, siginfo_t *info, void* void_context)
+{
+ os_context_t *context = arch_os_get_context(&void_context);
+ unsigned int pc = (unsigned int *)(*os_context_pc_addr(context));
+ os_vm_address_t addr;
+
+ addr = arch_get_bad_addr(signal,info,context);
+ if(!interrupt_maybe_gc(signal, info, context))
+ if(!handle_control_stack_guard_triggered(context,addr))
+ interrupt_handle_now(signal, info, context);
+}
+
+void
+os_install_interrupt_handlers(void)
+{
+ SHOW("os_install_interrupt_handlers()/bsd-os/!defined(GENCGC)");
+ undoably_install_low_level_interrupt_handler(SIG_MEMORY_FAULT,
+ sigsegv_handler);
+}
+
+#endif /* defined GENCGC */
+\f
+/* threads */
+
+/* no threading in any *BSD variant on any CPU (yet? in sbcl-0.8.0 anyway) */
+#ifdef LISP_FEATURE_SB_THREAD
+#error "Define threading support functions"
#else
-#error unsupported BSD variant
+int arch_os_thread_init(struct thread *thread) {
+ stack_t sigstack;
+#ifdef LISP_FEATURE_C_STACK_IS_CONTROL_STACK
+ /* 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 */
}
-
-#endif /* !defined GENCGC */
+int arch_os_thread_cleanup(struct thread *thread) {
+ return 1; /* success */
+}
+#endif
projects / sbcl.git / blobdiff