10 #include "interrupt.h"
13 /* The header files may not define PT_DAR/PT_DSISR. This definition
14 is correct for all versions of ppc linux >= 2.0.30
16 As of DR2.1u4, MkLinux doesn't pass these registers to signal
17 handlers correctly; a patch is necessary in order to (partially)
20 Even with the patch, the DSISR may not have its 'write' bit set
21 correctly (it tends not to be set if the fault was caused by
22 something other than a protection violation.)
39 arch_get_bad_addr(int sig, siginfo_t *code, os_context_t *context)
41 unsigned long badinstr;
42 unsigned int *pc = (unsigned int *)(*os_context_pc_addr(context));
47 /* Make sure it's not the pc thats bogus, and that it was lisp code */
48 /* that caused the fault. */
49 if ((((unsigned long)pc) & 3) != 0 ||
50 ((pc < READ_ONLY_SPACE_START ||
51 pc >= READ_ONLY_SPACE_START+READ_ONLY_SPACE_SIZE) &&
52 ((lispobj *)pc < current_dynamic_space &&
53 (lispobj *)pc >= current_dynamic_space + DYNAMIC_SPACE_SIZE)))
57 addr = (os_vm_address_t) (*os_context_register_addr(context,PT_DAR));
63 arch_skip_instruction(os_context_t *context)
65 ((char*)*os_context_pc_addr(context)) +=4;
69 arch_internal_error_arguments(os_context_t *context)
71 return (unsigned char *)(*os_context_pc_addr(context)+4);
76 arch_pseudo_atomic_atomic(os_context_t *context)
78 return ((*os_context_register_addr(context,reg_ALLOC)) & 4);
81 #define PSEUDO_ATOMIC_INTERRUPTED_BIAS 0x7f000000
84 arch_set_pseudo_atomic_interrupted(os_context_t *context)
86 *os_context_register_addr(context,reg_NL3)
87 += PSEUDO_ATOMIC_INTERRUPTED_BIAS;
91 arch_install_breakpoint(void *pc)
93 unsigned long *ptr = (unsigned long *)pc;
94 unsigned long result = *ptr;
95 *ptr = (3<<26) | (5 << 21) | trap_Breakpoint;
96 os_flush_icache((os_vm_address_t) pc, sizeof(unsigned long));
101 get_spinlock(lispobj *word,int value)
109 arch_remove_breakpoint(void *pc, unsigned long orig_inst)
111 *(unsigned long *)pc = orig_inst;
112 os_flush_icache((os_vm_address_t) pc, sizeof(unsigned long));
115 static unsigned long *skipped_break_addr, displaced_after_inst;
116 static sigset_t orig_sigmask;
119 arch_do_displaced_inst(os_context_t *context,unsigned int orig_inst)
121 /* not sure how we ensure that we get the breakpoint reinstalled
122 * after doing this -dan */
123 unsigned long *pc = (unsigned long *)(*os_context_pc_addr(context));
125 orig_sigmask = *os_context_sigmask_addr(context);
126 sigaddset_blockable(os_context_sigmask_addr(context));
129 os_flush_icache((os_vm_address_t) pc, sizeof(unsigned long));
130 skipped_break_addr = pc;
134 sigtrap_handler(int signal, siginfo_t *siginfo, os_context_t *context)
139 #ifdef LISP_FEATURE_LINUX
140 os_restore_fp_control(context);
142 mask=(os_context_sigmask_addr(context));
144 code=*((u32 *)(*os_context_pc_addr(context)));
145 if (code == ((3 << 26) | (16 << 21) | (reg_ALLOC << 16))) {
146 /* twlti reg_ALLOC,0 - check for deferred interrupt */
147 *os_context_register_addr(context,reg_ALLOC)
148 -= PSEUDO_ATOMIC_INTERRUPTED_BIAS;
149 arch_skip_instruction(context);
150 /* interrupt or GC was requested in PA; now we're done with the
151 PA section we may as well get around to it */
152 interrupt_handle_pending(context);
156 if ((code >> 16) == ((3 << 10) | (6 << 5))) {
157 /* twllei reg_ZERO,N will always trap if reg_ZERO = 0 */
158 int trap = code & 0x1f, extra = (code >> 5) & 0x1f;
162 fake_foreign_function_call(context);
163 lose("%%primitive halt called; the party is over.\n");
167 interrupt_internal_error(signal, code, context, trap == trap_Cerror);
170 case trap_PendingInterrupt:
171 /* when do we run this branch instead of the twlti code above? */
172 arch_skip_instruction(context);
173 interrupt_handle_pending(context);
176 case trap_Breakpoint:
177 handle_breakpoint(signal, code, context);
180 case trap_FunEndBreakpoint:
181 *os_context_pc_addr(context)
182 =(int)handle_fun_end_breakpoint(signal, code, context);
185 case trap_AfterBreakpoint:
186 *skipped_break_addr = trap_Breakpoint;
187 skipped_break_addr = NULL;
188 *(unsigned long *)*os_context_pc_addr(context)
189 = displaced_after_inst;
190 *os_context_sigmask_addr(context)= orig_sigmask;
192 os_flush_icache((os_vm_address_t) *os_context_pc_addr(context),
193 sizeof(unsigned long));
197 interrupt_handle_now(signal, code, context);
201 if (((code >> 26) == 3) && (((code >> 21) & 31) == 24)) {
202 interrupt_internal_error(signal, code, context, 0);
205 interrupt_handle_now(signal, code, context);
209 void arch_install_interrupt_handlers()
211 undoably_install_low_level_interrupt_handler(SIGILL,sigtrap_handler);
212 undoably_install_low_level_interrupt_handler(SIGTRAP,sigtrap_handler);
216 extern lispobj call_into_lisp(lispobj fun, lispobj *args, int nargs);
218 lispobj funcall0(lispobj function)
220 lispobj *args = current_control_stack_pointer;
222 return call_into_lisp(function, args, 0);
225 lispobj funcall1(lispobj function, lispobj arg0)
227 lispobj *args = current_control_stack_pointer;
229 current_control_stack_pointer += 1;
232 return call_into_lisp(function, args, 1);
235 lispobj funcall2(lispobj function, lispobj arg0, lispobj arg1)
237 lispobj *args = current_control_stack_pointer;
239 current_control_stack_pointer += 2;
243 return call_into_lisp(function, args, 2);
246 lispobj funcall3(lispobj function, lispobj arg0, lispobj arg1, lispobj arg2)
248 lispobj *args = current_control_stack_pointer;
250 current_control_stack_pointer += 3;
255 return call_into_lisp(function, args, 3);
259 ppc_flush_icache(os_vm_address_t address, os_vm_size_t length)
261 os_vm_address_t end = (os_vm_address_t) ((int)(address+length+(32-1)) &~(32-1));
262 extern void ppc_flush_cache_line(os_vm_address_t);
264 while (address < end) {
265 ppc_flush_cache_line(address);