* files for more information.
*/
-/*
- * $Header$
- */
-
#include <stdio.h>
+#include "sbcl.h"
#include "runtime.h"
#include "globals.h"
#include "validate.h"
#include "os.h"
-#include "sbcl.h"
#include "arch.h"
#include "lispregs.h"
#include "signal.h"
#include "interrupt.h"
#include "interr.h"
#include "breakpoint.h"
+#include "thread.h"
+#include "pseudo-atomic.h"
-#define BREAKPOINT_INST 0xcc /* INT3 */
+#include "genesis/static-symbols.h"
+#include "genesis/symbol.h"
+
+#define BREAKPOINT_INST 0xcc /* INT3 */
+#define UD2_INST 0x0b0f /* UD2 */
+
+#ifndef LISP_FEATURE_UD2_BREAKPOINTS
+#define BREAKPOINT_WIDTH 1
+#else
+#define BREAKPOINT_WIDTH 2
+#endif
unsigned long fast_random_state = 1;
void arch_init(void)
{}
+
+#ifndef LISP_FEATURE_WIN32
+os_vm_address_t
+arch_get_bad_addr(int sig, siginfo_t *code, os_context_t *context)
+{
+ return (os_vm_address_t)code->si_addr;
+}
+#endif
+
\f
/*
* hacking signal contexts
int *
context_eflags_addr(os_context_t *context)
{
-#if defined __linux__
+#if defined __linux__ || defined __sun
/* KLUDGE: As of kernel 2.2.14 on Red Hat 6.2, there's code in the
* <sys/ucontext.h> file to define symbolic names for offsets into
* gregs[], but it's conditional on __USE_GNU and not defined, so
return &context->uc_mcontext.mc_eflags;
#elif defined __OpenBSD__
return &context->sc_eflags;
+#elif defined LISP_FEATURE_DARWIN
+ return (int *)(&context->uc_mcontext->SS.EFLAGS);
+#elif defined __NetBSD__
+ return &(context->uc_mcontext.__gregs[_REG_EFL]);
+#elif defined LISP_FEATURE_WIN32
+ return (int *)&context->EFlags;
#else
#error unsupported OS
#endif
int vlen;
int code;
- FSHOW((stderr, "[arch_skip_inst at %x]\n", *os_context_pc_addr(context)));
/* Get and skip the Lisp interrupt code. */
code = *(char*)(*os_context_pc_addr(context))++;
switch (code)
- {
- case trap_Error:
- case trap_Cerror:
- /* Lisp error arg vector length */
- vlen = *(char*)(*os_context_pc_addr(context))++;
- /* Skip Lisp error arg data bytes. */
- while (vlen-- > 0) {
- (char*)(*os_context_pc_addr(context))++;
- }
- break;
-
- case trap_Breakpoint: /* not tested */
- case trap_FunctionEndBreakpoint: /* not tested */
- break;
-
- case trap_PendingInterrupt:
- case trap_Halt:
- /* only needed to skip the Code */
- break;
-
- default:
- fprintf(stderr,"[arch_skip_inst invalid code %d\n]\n",code);
- break;
- }
+ {
+ case trap_Error:
+ case trap_Cerror:
+ /* Lisp error arg vector length */
+ vlen = *(char*)(*os_context_pc_addr(context))++;
+ /* Skip Lisp error arg data bytes. */
+ while (vlen-- > 0) {
+ ++*os_context_pc_addr(context);
+ }
+ break;
+
+ case trap_Breakpoint: /* not tested */
+ case trap_FunEndBreakpoint: /* not tested */
+ break;
+
+ case trap_PendingInterrupt:
+ case trap_Halt:
+ case trap_SingleStepAround:
+ case trap_SingleStepBefore:
+ /* only needed to skip the Code */
+ break;
+
+ default:
+ fprintf(stderr,"[arch_skip_inst invalid code %d\n]\n",code);
+ break;
+ }
FSHOW((stderr,
- "[arch_skip_inst resuming at %x]\n",
- *os_context_pc_addr(context)));
+ "/[arch_skip_inst resuming at %x]\n",
+ *os_context_pc_addr(context)));
}
unsigned char *
boolean
arch_pseudo_atomic_atomic(os_context_t *context)
{
- return SymbolValue(PSEUDO_ATOMIC_ATOMIC);
+ return get_pseudo_atomic_atomic(arch_os_get_current_thread());
}
void
arch_set_pseudo_atomic_interrupted(os_context_t *context)
{
- SetSymbolValue(PSEUDO_ATOMIC_INTERRUPTED, make_fixnum(1));
+ struct thread *thread = arch_os_get_current_thread();
+ set_pseudo_atomic_interrupted(thread);
+}
+
+void
+arch_clear_pseudo_atomic_interrupted(os_context_t *context)
+{
+ struct thread *thread = arch_os_get_current_thread();
+ clear_pseudo_atomic_interrupted(thread);
}
\f
/*
* This stuff seems to get called for TRACE and debug activity.
*/
-unsigned long
+unsigned int
arch_install_breakpoint(void *pc)
{
- unsigned long result = *(unsigned long*)pc;
+ unsigned int result = *(unsigned int*)pc;
- *(char*)pc = BREAKPOINT_INST; /* x86 INT3 */
- *((char*)pc+1) = trap_Breakpoint; /* Lisp trap code */
+#ifndef LISP_FEATURE_UD2_BREAKPOINTS
+ *(char*)pc = BREAKPOINT_INST; /* x86 INT3 */
+ *((char*)pc+1) = trap_Breakpoint; /* Lisp trap code */
+#else
+ *(char*)pc = UD2_INST & 0xff;
+ *((char*)pc+1) = UD2_INST >> 8;
+ *((char*)pc+2) = trap_Breakpoint;
+#endif
return result;
}
void
-arch_remove_breakpoint(void *pc, unsigned long orig_inst)
+arch_remove_breakpoint(void *pc, unsigned int orig_inst)
{
*((char *)pc) = orig_inst & 0xff;
*((char *)pc + 1) = (orig_inst & 0xff00) >> 8;
+#if BREAKPOINT_WIDTH > 1
+ *((char *)pc + 2) = (orig_inst & 0xff0000) >> 16;
+#endif
}
\f
/* When single stepping, single_stepping holds the original instruction
* PC location. */
-unsigned int *single_stepping=NULL;
-#ifndef __linux__
+unsigned int *single_stepping = NULL;
+#ifdef CANNOT_GET_TO_SINGLE_STEP_FLAG
unsigned int single_step_save1;
unsigned int single_step_save2;
unsigned int single_step_save3;
#endif
void
-arch_do_displaced_inst(os_context_t *context, unsigned long orig_inst)
+arch_do_displaced_inst(os_context_t *context, unsigned int orig_inst)
{
unsigned int *pc = (unsigned int*)(*os_context_pc_addr(context));
/* Put the original instruction back. */
- *((char *)pc) = orig_inst & 0xff;
- *((char *)pc + 1) = (orig_inst & 0xff00) >> 8;
+ arch_remove_breakpoint(pc, orig_inst);
-#ifdef __linux__
- *context_eflags_addr(context) |= 0x100;
-#else
+#ifdef CANNOT_GET_TO_SINGLE_STEP_FLAG
/* Install helper instructions for the single step:
* pushf; or [esp],0x100; popf. */
single_step_save1 = *(pc-3);
*(pc-3) = 0x9c909090;
*(pc-2) = 0x00240c81;
*(pc-1) = 0x9d000001;
+#else
+ *context_eflags_addr(context) |= 0x100;
#endif
- single_stepping = (unsigned int*)pc;
+ single_stepping = pc;
-#ifndef __linux__
- *os_context_pc_addr(context) = (char *)pc - 9;
+#ifdef CANNOT_GET_TO_SINGLE_STEP_FLAG
+ *os_context_pc_addr(context) = (os_context_register_t)((char *)pc - 9);
#endif
}
\f
void
-sigtrap_handler(int signal, siginfo_t *info, void *void_context)
+restore_breakpoint_from_single_step(os_context_t * context)
{
- int code = info->si_code;
- os_context_t *context = (os_context_t*)void_context;
- unsigned int trap;
-
- if (single_stepping && (signal==SIGTRAP))
- {
- /* fprintf(stderr,"* single step trap %x\n", single_stepping); */
-
-#ifndef __linux__
- /* Un-install single step helper instructions. */
- *(single_stepping-3) = single_step_save1;
- *(single_stepping-2) = single_step_save2;
- *(single_stepping-1) = single_step_save3;
+ /* fprintf(stderr,"* single step trap %x\n", single_stepping); */
+#ifdef CANNOT_GET_TO_SINGLE_STEP_FLAG
+ /* Un-install single step helper instructions. */
+ *(single_stepping-3) = single_step_save1;
+ *(single_stepping-2) = single_step_save2;
+ *(single_stepping-1) = single_step_save3;
#else
- *context_eflags_addr(context) ^= 0x100;
+ *context_eflags_addr(context) &= ~0x100;
#endif
- /* Re-install the breakpoint if possible. */
- if (*os_context_pc_addr(context) == (int)single_stepping + 1) {
- fprintf(stderr, "warning: couldn't reinstall breakpoint\n");
- } else {
- char *ptr = (char*)single_stepping;
- *((char *)single_stepping) = BREAKPOINT_INST; /* x86 INT3 */
- *((char *)single_stepping+1) = trap_Breakpoint;
- }
-
- single_stepping = NULL;
- return;
+ /* Re-install the breakpoint if possible. */
+ if (((char *)*os_context_pc_addr(context) >
+ (char *)single_stepping) &&
+ ((char *)*os_context_pc_addr(context) <=
+ (char *)single_stepping + BREAKPOINT_WIDTH)) {
+ fprintf(stderr, "warning: couldn't reinstall breakpoint\n");
+ } else {
+ arch_install_breakpoint(single_stepping);
+ }
+
+ single_stepping = NULL;
+ return;
+}
+
+void
+arch_handle_breakpoint(os_context_t *context)
+{
+ *os_context_pc_addr(context) -= BREAKPOINT_WIDTH;
+ handle_breakpoint(context);
+}
+
+void
+arch_handle_fun_end_breakpoint(os_context_t *context)
+{
+ *os_context_pc_addr(context) -= BREAKPOINT_WIDTH;
+ *os_context_pc_addr(context) =
+ (int)handle_fun_end_breakpoint(context);
+}
+
+void
+arch_handle_single_step_trap(os_context_t *context, int trap)
+{
+ arch_skip_instruction(context);
+ /* On x86 the fdefn / function is always in EAX, so we pass 0
+ * as the register_offset. */
+ handle_single_step_trap(context, trap, 0);
+}
+
+#ifndef LISP_FEATURE_WIN32
+void
+sigtrap_handler(int signal, siginfo_t *info, os_context_t *context)
+{
+ unsigned int trap;
+
+ if (single_stepping) {
+ restore_breakpoint_from_single_step(context);
+ return;
}
/* This is just for info in case the monitor wants to print an
* approximation. */
- current_control_stack_pointer =
- (lispobj*)*os_context_sp_addr(context);
+ access_control_stack_pointer(arch_os_get_current_thread()) =
+ (lispobj *)*os_context_sp_addr(context);
+
+#ifdef LISP_FEATURE_SUNOS
+ /* For some reason the breakpoints that :ENCAPSULATE NIL tracing sets up
+ * cause a trace trap (i.e. processor single-stepping trap) on the following
+ * instruction on Solaris 10/x86. -- JES, 2006-04-07
+ */
+ if (info->si_code == TRAP_TRACE) {
+ lose("foo");
+ return;
+ }
+#endif
/* On entry %eip points just after the INT3 byte and aims at the
* 'kind' value (eg trap_Cerror). For error-trap and Cerror-trap a
* number of bytes will follow, the first is the length of the byte
* arguments to follow. */
trap = *(unsigned char *)(*os_context_pc_addr(context));
- switch (trap) {
-
- case trap_PendingInterrupt:
- FSHOW((stderr, "<trap pending interrupt>\n"));
- arch_skip_instruction(context);
- interrupt_handle_pending(context);
- break;
-
- case trap_Halt:
- /* Note: the old CMU CL code tried to save FPU state
- * here, and restore it after we do our thing, but there
- * seems to be no point in doing that, since we're just
- * going to lose(..) anyway. */
- fake_foreign_function_call(context);
- lose("%%primitive halt called; the party is over.");
-
- case trap_Error:
- case trap_Cerror:
- FSHOW((stderr, "<trap error/cerror %d>\n", code));
- interrupt_internal_error(signal, info, context, code==trap_Cerror);
- break;
-
- case trap_Breakpoint:
- (char*)(*os_context_pc_addr(context)) -= 1;
- handle_breakpoint(signal, info, context);
- break;
-
- case trap_FunctionEndBreakpoint:
- (char*)(*os_context_pc_addr(context)) -= 1;
- *os_context_pc_addr(context) =
- (int)handle_function_end_breakpoint(signal, info, context);
- break;
-
- default:
- FSHOW((stderr,"[C--trap default %d %d %x]\n",
- signal, code, context));
- interrupt_handle_now(signal, info, context);
- break;
+ handle_trap(context, trap);
+}
+
+void
+sigill_handler(int signal, siginfo_t *siginfo, os_context_t *context) {
+ /* Triggering SIGTRAP using int3 is unreliable on OS X/x86, so
+ * we need to use illegal instructions for traps.
+ */
+#if defined(LISP_FEATURE_UD2_BREAKPOINTS) && !defined(LISP_FEATURE_MACH_EXCEPTION_HANDLER)
+ if (*((unsigned short *)*os_context_pc_addr(context)) == UD2_INST) {
+ *os_context_pc_addr(context) += 2;
+ return sigtrap_handler(signal, siginfo, context);
}
+#endif
+ fake_foreign_function_call(context);
+ lose("Unhandled SIGILL");
}
+#endif /* not LISP_FEATURE_WIN32 */
void
arch_install_interrupt_handlers()
{
- interrupt_install_low_level_handler(SIGILL , sigtrap_handler);
- interrupt_install_low_level_handler(SIGTRAP, sigtrap_handler);
+ SHOW("entering arch_install_interrupt_handlers()");
+
+ /* Note: The old CMU CL code here used sigtrap_handler() to handle
+ * SIGILL as well as SIGTRAP. I couldn't see any reason to do
+ * things that way. So, I changed to separate handlers when
+ * debugging a problem on OpenBSD, where SBCL wasn't catching
+ * SIGILL properly, but was instead letting the process be
+ * terminated with an "Illegal instruction" output. If this change
+ * turns out to break something (maybe breakpoint handling on some
+ * OS I haven't tested on?) and we have to go back to the old CMU
+ * CL way, I hope there will at least be a comment to explain
+ * why.. -- WHN 2001-06-07 */
+#if !defined(LISP_FEATURE_WIN32) && !defined(LISP_FEATURE_MACH_EXCEPTION_HANDLER)
+ undoably_install_low_level_interrupt_handler(SIGILL , sigill_handler);
+ undoably_install_low_level_interrupt_handler(SIGTRAP, sigtrap_handler);
+#endif
+ SHOW("returning from arch_install_interrupt_handlers()");
}
\f
-/* This is implemented in assembly language and called from C: */
-extern lispobj
-call_into_lisp(lispobj fun, lispobj *args, int nargs);
-
-/* These functions are an interface to the Lisp call-in facility.
- * Since this is C we can know nothing about the calling environment.
- * The control stack might be the C stack if called from the monitor
- * or the Lisp stack if called as a result of an interrupt or maybe
- * even a separate stack. The args are most likely on that stack but
- * could be in registers depending on what the compiler likes. So we
- * copy the args into a portable vector and let the assembly language
- * call-in function figure it out. */
-lispobj
-funcall0(lispobj function)
-{
- lispobj *args = NULL;
+#ifdef LISP_FEATURE_LINKAGE_TABLE
+/* FIXME: It might be cleaner to generate these from the lisp side of
+ * things.
+ */
- return call_into_lisp(function, args, 0);
-}
-lispobj
-funcall1(lispobj function, lispobj arg0)
-{
- lispobj args[1];
- args[0] = arg0;
- return call_into_lisp(function, args, 1);
-}
-lispobj
-funcall2(lispobj function, lispobj arg0, lispobj arg1)
+void
+arch_write_linkage_table_jmp(char * reloc, void * fun)
{
- lispobj args[2];
- args[0] = arg0;
- args[1] = arg1;
- return call_into_lisp(function, args, 2);
+ /* Make JMP to function entry. JMP offset is calculated from next
+ * instruction.
+ */
+ long offset = (char *)fun - (reloc + 5);
+ int i;
+
+ *reloc++ = 0xe9; /* opcode for JMP rel32 */
+ for (i = 0; i < 4; i++) {
+ *reloc++ = offset & 0xff;
+ offset >>= 8;
+ }
+
+ /* write a nop for good measure. */
+ *reloc = 0x90;
}
-lispobj
-funcall3(lispobj function, lispobj arg0, lispobj arg1, lispobj arg2)
+
+void
+arch_write_linkage_table_ref(void * reloc, void * data)
{
- lispobj args[3];
- args[0] = arg0;
- args[1] = arg1;
- args[2] = arg2;
- return call_into_lisp(function, args, 3);
+ *(unsigned long *)reloc = (unsigned long)data;
}
+
+#endif
projects / sbcl.git / blobdiff