+/*
+ * This software is part of the SBCL system. See the README file for
+ * more information.
+ *
+ * This software is derived from the CMU CL system, which was
+ * written at Carnegie Mellon University and released into the
+ * public domain. The software is in the public domain and is
+ * provided with absolutely no warranty. See the COPYING and CREDITS
+ * files for more information.
+ */
+
#include <stdio.h>
#include "sbcl.h"
#include "globals.h"
#include "validate.h"
#include "os.h"
+#include "interrupt.h"
#include "lispregs.h"
#include "signal.h"
#include "interrupt.h"
#include "interr.h"
+#include "breakpoint.h"
+#include "alloc.h"
#if defined(LISP_FEATURE_GENCGC)
#include "gencgc-alloc-region.h"
#endif
+#ifdef LISP_FEATURE_SB_THREAD
+#include "pseudo-atomic.h"
+#endif
+
/* The header files may not define PT_DAR/PT_DSISR. This definition
is correct for all versions of ppc linux >= 2.0.30
#endif
#endif
+/* Magic encoding for the instruction used for traps. */
+#define TRAP_INSTRUCTION(trap) ((3<<26) | (6 << 21) | (trap))
+
void arch_init() {
}
os_vm_address_t
arch_get_bad_addr(int sig, siginfo_t *code, os_context_t *context)
{
- unsigned long pc = (unsigned long)(*os_context_pc_addr(context));
os_vm_address_t addr;
-#if defined(LISP_FEATURE_NETBSD)
+#if defined(LISP_FEATURE_NETBSD) || defined(LISP_FEATURE_OPENBSD)
addr = (os_vm_address_t) (code->si_addr);
#else
addr = (os_vm_address_t) (*os_context_register_addr(context,PT_DAR));
boolean
arch_pseudo_atomic_atomic(os_context_t *context)
{
- return ((*os_context_register_addr(context,reg_ALLOC)) & 4);
+#ifdef LISP_FEATURE_SB_THREAD
+ struct thread *thread = arch_os_get_current_thread();
+
+ if (foreign_function_call_active_p(thread)) {
+ return get_pseudo_atomic_atomic(thread);
+ } else return
+#else
+ /* FIXME: this foreign_function_call_active test is dubious at
+ * best. If a foreign call is made in a pseudo atomic section
+ * (?) or more likely a pseudo atomic section is in a foreign
+ * call then an interrupt is executed immediately. Maybe it
+ * has to do with C code not maintaining pseudo atomic
+ * properly. MG - 2005-08-10
+ *
+ * The foreign_function_call_active used to live at each call-site
+ * to arch_pseudo_atomic_atomic, but this seems clearer.
+ * --NS 2007-05-15 */
+ return (!foreign_function_call_active_p(arch_os_get_current_thread())) &&
+#endif
+ ((*os_context_register_addr(context,reg_ALLOC)) & flag_PseudoAtomic);
}
void
arch_set_pseudo_atomic_interrupted(os_context_t *context)
{
- *os_context_register_addr(context,reg_ALLOC) |= 1;
+#ifdef LISP_FEATURE_SB_THREAD
+ struct thread *thread = arch_os_get_current_thread();
+
+ if (foreign_function_call_active_p(thread)) {
+ set_pseudo_atomic_interrupted(thread);
+ } else
+#endif
+ *os_context_register_addr(context,reg_ALLOC)
+ |= flag_PseudoAtomicInterrupted;
}
void
arch_clear_pseudo_atomic_interrupted(os_context_t *context)
{
- *os_context_register_addr(context,reg_ALLOC) &= ~1;
+#ifdef LISP_FEATURE_SB_THREAD
+ struct thread *thread = arch_os_get_current_thread();
+
+ if (foreign_function_call_active_p(thread)) {
+ clear_pseudo_atomic_interrupted(thread);
+ } else
+#endif
+ *os_context_register_addr(context,reg_ALLOC)
+ &= ~flag_PseudoAtomicInterrupted;
}
unsigned int
{
unsigned int *ptr = (unsigned int *)pc;
unsigned int result = *ptr;
- *ptr = (3<<26) | (5 << 21) | trap_Breakpoint;
+ *ptr = TRAP_INSTRUCTION(trap_Breakpoint);
os_flush_icache((os_vm_address_t) pc, sizeof(unsigned int));
return result;
}
static unsigned int *skipped_break_addr, displaced_after_inst;
static sigset_t orig_sigmask;
+static boolean
+should_branch(os_context_t *context, unsigned int orig_inst)
+{
+ /* orig_inst is a conditional branch instruction. We need to
+ * know if the branch will be taken if executed in context. */
+ int ctr = *os_context_ctr_addr(context);
+ int cr = *os_context_cr_addr(context);
+ int bo_field = (orig_inst >> 21) & 0x1f;
+ int bi_field = (orig_inst >> 16) & 0x1f;
+ int ctr_ok;
+
+ if (!(bo_field & 4)) ctr--; /* Decrement CTR if necessary. */
+
+ ctr_ok = (bo_field & 4) || ((ctr == 0) == ((bo_field & 2) == 2));
+ return ctr_ok && ((bo_field & 0x10) ||
+ !(((cr >> (31-bi_field)) ^ (bo_field >> 3)) & 1));
+}
+
void
-arch_do_displaced_inst(os_context_t *context,unsigned int orig_inst)
+arch_do_displaced_inst(os_context_t *context, unsigned int orig_inst)
{
/* not sure how we ensure that we get the breakpoint reinstalled
* after doing this -dan */
unsigned int *pc = (unsigned int *)(*os_context_pc_addr(context));
+ unsigned int *next_pc;
+ int op = orig_inst >> 26;
+ int sub_op = (orig_inst & 0x7fe) >> 1; /* XL-form sub-opcode */
orig_sigmask = *os_context_sigmask_addr(context);
sigaddset_blockable(os_context_sigmask_addr(context));
*pc = orig_inst;
os_flush_icache((os_vm_address_t) pc, sizeof(unsigned int));
skipped_break_addr = pc;
+
+ /* Figure out where we will end up after running the displaced
+ * instruction by defaulting to the next instruction in the stream
+ * and then checking for branch instructions. FIXME: This will
+ * probably screw up if it attempts to step a trap instruction. */
+ next_pc = pc + 1;
+
+ if (op == 18) {
+ /* Branch I-form */
+ unsigned int displacement = orig_inst & 0x03fffffc;
+ /* Sign extend */
+ if (displacement & 0x02000000) {
+ displacement |= 0xc0000000;
+ }
+ if (orig_inst & 2) { /* Absolute Address */
+ next_pc = (unsigned int *)displacement;
+ } else {
+ next_pc = (unsigned int *)(((unsigned int)pc) + displacement);
+ }
+ } else if ((op == 16)
+ && should_branch(context, orig_inst)) {
+ /* Branch Conditional B-form */
+ unsigned int displacement = orig_inst & 0x0000fffc;
+ /* Sign extend */
+ if (displacement & 0x00008000) {
+ displacement |= 0xffff0000;
+ }
+ if (orig_inst & 2) { /* Absolute Address */
+ next_pc = (unsigned int *)displacement;
+ } else {
+ next_pc = (unsigned int *)(((unsigned int)pc) + displacement);
+ }
+ } else if ((op == 19) && (sub_op == 16)
+ && should_branch(context, orig_inst)) {
+ /* Branch Conditional to Link Register XL-form */
+ next_pc = (unsigned int *)
+ ((*os_context_lr_addr(context)) & ~3);
+ } else if ((op == 19) && (sub_op == 528)
+ && should_branch(context, orig_inst)) {
+ /* Branch Conditional to Count Register XL-form */
+ next_pc = (unsigned int *)
+ ((*os_context_ctr_addr(context)) & ~3);
+ }
+
+ /* Set the "after" breakpoint. */
+ displaced_after_inst = *next_pc;
+ *next_pc = TRAP_INSTRUCTION(trap_AfterBreakpoint);
+ os_flush_icache((os_vm_address_t)next_pc, sizeof(unsigned int));
}
#ifdef LISP_FEATURE_GENCGC
&& (4 == ((inst >> 1) & 0x3ff))) {
/*
* We got the instruction. Now, look back to make sure it was
- * proceeded by what we expected. 2 instructions back should be
- * an ADD or ADDI instruction.
+ * proceeded by what we expected. The previous instruction
+ * should be an ADD or ADDI instruction.
*/
unsigned int add_inst;
- add_inst = pc[-3];
+ add_inst = pc[-1];
#if 0
fprintf(stderr, " add inst at %p: inst = 0x%08x\n",
- pc - 3, add_inst);
+ pc - 1, add_inst);
#endif
opcode = add_inst >> 26;
if ((opcode == 31) && (266 == ((add_inst >> 1) & 0x1ff))) {
{
unsigned int *pc;
unsigned int inst;
- unsigned int or_inst;
unsigned int target, target_ptr, end_addr;
unsigned int opcode;
int size;
- int immed;
boolean were_in_lisp;
char *memory;
- sigset_t block;
target = 0;
size = 0;
fprintf(stderr, "In handle_allocation_trap\n");
#endif
- /*
- * I don't think it's possible for us NOT to be in lisp when we get
- * here. Remove this later?
- */
- were_in_lisp = !foreign_function_call_active;
+ /* I don't think it's possible for us NOT to be in lisp when we get
+ * here. Remove this later? */
+ were_in_lisp = !foreign_function_call_active_p(arch_os_get_current_thread());
if (were_in_lisp) {
fake_foreign_function_call(context);
* is the size of the allocation. Get it and call alloc to allocate
* new space.
*/
- inst = pc[-3];
+ inst = pc[-1];
opcode = inst >> 26;
#if 0
fprintf(stderr, " add inst = 0x%08x, opcode = %d\n", inst, opcode);
dynamic_space_free_pointer);
#endif
- memory = (char *) alloc(size);
+ {
+ struct interrupt_data *data =
+ arch_os_get_current_thread()->interrupt_data;
+ data->allocation_trap_context = context;
+ memory = (char *) alloc(size);
+ data->allocation_trap_context = 0;
+ }
#if 0
fprintf(stderr, "alloc returned %p\n", memory);
#endif
*os_context_register_addr(context, target) = (unsigned long) memory;
+#ifndef LISP_FEATURE_SB_THREAD
+ /* This is handled by the fake_foreign_function_call machinery on
+ * threaded targets. */
*os_context_register_addr(context, reg_ALLOC) =
(unsigned long) dynamic_space_free_pointer
| (*os_context_register_addr(context, reg_ALLOC)
& LOWTAG_MASK);
+#endif
if (were_in_lisp) {
undo_fake_foreign_function_call(context);
}
+ /* Skip the allocation trap and the write of the updated free
+ * pointer back to the allocation region. This is two
+ * instructions when threading is enabled and four instructions
+ * otherwise. */
+#ifdef LISP_FEATURE_SB_THREAD
+ (*os_context_pc_addr(context)) = pc + 2;
+#else
+ (*os_context_pc_addr(context)) = pc + 4;
+#endif
}
#endif
+void
+arch_handle_breakpoint(os_context_t *context)
+{
+ handle_breakpoint(context);
+}
+
+void
+arch_handle_fun_end_breakpoint(os_context_t *context)
+{
+ *os_context_pc_addr(context)
+ =(int)handle_fun_end_breakpoint(context);
+}
+
+void
+arch_handle_after_breakpoint(os_context_t *context)
+{
+ *skipped_break_addr = TRAP_INSTRUCTION(trap_Breakpoint);
+ os_flush_icache((os_vm_address_t) skipped_break_addr,
+ sizeof(unsigned int));
+ skipped_break_addr = NULL;
+ *(unsigned int *)*os_context_pc_addr(context)
+ = displaced_after_inst;
+ *os_context_sigmask_addr(context)= orig_sigmask;
+ os_flush_icache((os_vm_address_t) *os_context_pc_addr(context),
+ sizeof(unsigned int));
+}
+
+void
+arch_handle_single_step_trap(os_context_t *context, int trap)
+{
+ unsigned int code = *((u32 *)(*os_context_pc_addr(context)));
+ int register_offset = code >> 5 & 0x1f;
+ handle_single_step_trap(context, trap, register_offset);
+ arch_skip_instruction(context);
+}
static void
sigtrap_handler(int signal, siginfo_t *siginfo, os_context_t *context)
{
unsigned int code;
-#ifdef LISP_FEATURE_LINUX
- os_restore_fp_control(context);
-#endif
code=*((u32 *)(*os_context_pc_addr(context)));
if (code == ((3 << 26) | (0x18 << 21) | (reg_NL3 << 16))) {
arch_clear_pseudo_atomic_interrupted(context);
/* Is this an allocation trap? */
if (allocation_trap_p(context)) {
handle_allocation_trap(context);
- arch_skip_instruction(context);
-#ifdef LISP_FEATURE_DARWIN
- DARWIN_FIX_CONTEXT(context);
-#endif
return;
}
#endif
if ((code >> 16) == ((3 << 10) | (6 << 5))) {
/* twllei reg_ZERO,N will always trap if reg_ZERO = 0 */
int trap = code & 0x1f;
-
- switch (trap) {
- case trap_Halt:
- fake_foreign_function_call(context);
- lose("%%primitive halt called; the party is over.\n");
-
- case trap_Error:
- case trap_Cerror:
- interrupt_internal_error(signal, code, context, trap == trap_Cerror);
- break;
-
- case trap_PendingInterrupt:
- /* This is supposed run after WITHOUT-INTERRUPTS if there
- * were pending signals. */
- arch_skip_instruction(context);
- interrupt_handle_pending(context);
- break;
-
- case trap_Breakpoint:
- handle_breakpoint(signal, code, context);
- break;
-
- case trap_FunEndBreakpoint:
- *os_context_pc_addr(context)
- =(int)handle_fun_end_breakpoint(signal, code, context);
- break;
-
- case trap_AfterBreakpoint:
- *skipped_break_addr = trap_Breakpoint;
- skipped_break_addr = NULL;
- *(unsigned int *)*os_context_pc_addr(context)
- = displaced_after_inst;
- *os_context_sigmask_addr(context)= orig_sigmask;
-
- os_flush_icache((os_vm_address_t) *os_context_pc_addr(context),
- sizeof(unsigned int));
- break;
-
- case trap_SingleStepAround:
- case trap_SingleStepBefore:
- {
- int register_offset = code >> 5 & 0x1f;
-
- handle_single_step_trap(context, trap, register_offset);
-
- arch_skip_instruction(context);
- break;
- }
- default:
- interrupt_handle_now(signal, code, context);
- break;
- }
-#ifdef LISP_FEATURE_DARWIN
- DARWIN_FIX_CONTEXT(context);
-#endif
+ handle_trap(context,trap);
return;
}
if (((code >> 26) == 3) && (((code >> 21) & 31) == 24)) {
- interrupt_internal_error(signal, code, context, 0);
-#ifdef LISP_FEATURE_DARWIN
- DARWIN_FIX_CONTEXT(context);
-#endif
+ interrupt_internal_error(context, 0);
return;
}
- interrupt_handle_now(signal, code, context);
-#ifdef LISP_FEATURE_DARWIN
- /* Work around G5 bug */
- DARWIN_FIX_CONTEXT(context);
-#endif
+ interrupt_handle_now(signal, (siginfo_t *)code, context);
}
void arch_install_interrupt_handlers()
{
- undoably_install_low_level_interrupt_handler(SIGILL,sigtrap_handler);
- undoably_install_low_level_interrupt_handler(SIGTRAP,sigtrap_handler);
-}
-
-
-extern lispobj call_into_lisp(lispobj fun, lispobj *args, int nargs);
-
-lispobj funcall0(lispobj function)
-{
- lispobj *args = current_control_stack_pointer;
-
- return call_into_lisp(function, args, 0);
-}
-
-lispobj funcall1(lispobj function, lispobj arg0)
-{
- lispobj *args = current_control_stack_pointer;
-
- current_control_stack_pointer += 1;
- args[0] = arg0;
-
- return call_into_lisp(function, args, 1);
-}
-
-lispobj funcall2(lispobj function, lispobj arg0, lispobj arg1)
-{
- lispobj *args = current_control_stack_pointer;
-
- current_control_stack_pointer += 2;
- args[0] = arg0;
- args[1] = arg1;
-
- return call_into_lisp(function, args, 2);
-}
-
-lispobj funcall3(lispobj function, lispobj arg0, lispobj arg1, lispobj arg2)
-{
- lispobj *args = current_control_stack_pointer;
-
- current_control_stack_pointer += 3;
- args[0] = arg0;
- args[1] = arg1;
- args[2] = arg2;
-
- return call_into_lisp(function, args, 3);
+ undoably_install_low_level_interrupt_handler(SIGILL, sigtrap_handler);
+ undoably_install_low_level_interrupt_handler(SIGTRAP, sigtrap_handler);
}
void
inst = (19 << 26) | (20 << 21) | (528 << 1);
*inst_ptr++ = inst;
-
- *inst_ptr++ = inst;
-
os_flush_icache((os_vm_address_t) reloc_addr, (char*) inst_ptr - (char*) reloc_addr);
}
projects / sbcl.git / blobdiff