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 arch_remove_breakpoint(void *pc, unsigned long orig_inst)
103 *(unsigned long *)pc = orig_inst;
104 os_flush_icache((os_vm_address_t) pc, sizeof(unsigned long));
107 static unsigned long *skipped_break_addr, displaced_after_inst;
108 static sigset_t orig_sigmask;
111 arch_do_displaced_inst(os_context_t *context,unsigned int orig_inst)
113 /* not sure how we ensure that we get the breakpoint reinstalled
114 * after doing this -dan */
115 unsigned long *pc = (unsigned long *)(*os_context_pc_addr(context));
117 orig_sigmask = *os_context_sigmask_addr(context);
118 sigaddset_blockable(os_context_sigmask_addr(context));
121 os_flush_icache((os_vm_address_t) pc, sizeof(unsigned long));
122 skipped_break_addr = pc;
126 sigtrap_handler(int signal, siginfo_t *siginfo, os_context_t *context)
131 #ifdef LISP_FEATURE_LINUX
132 os_restore_fp_control(context);
134 mask=(os_context_sigmask_addr(context));
136 code=*((u32 *)(*os_context_pc_addr(context)));
137 if (code == ((3 << 26) | (16 << 21) | (reg_ALLOC << 16))) {
138 /* twlti reg_ALLOC,0 - check for deferred interrupt */
139 *os_context_register_addr(context,reg_ALLOC)
140 -= PSEUDO_ATOMIC_INTERRUPTED_BIAS;
141 arch_skip_instruction(context);
142 /* interrupt or GC was requested in PA; now we're done with the
143 PA section we may as well get around to it */
144 interrupt_handle_pending(context);
148 if ((code >> 16) == ((3 << 10) | (6 << 5))) {
149 /* twllei reg_ZERO,N will always trap if reg_ZERO = 0 */
150 int trap = code & 0x1f, extra = (code >> 5) & 0x1f;
154 fake_foreign_function_call(context);
155 lose("%%primitive halt called; the party is over.\n");
159 interrupt_internal_error(signal, code, context, trap == trap_Cerror);
162 case trap_PendingInterrupt:
163 /* when do we run this branch instead of the twlti code above? */
164 arch_skip_instruction(context);
165 interrupt_handle_pending(context);
168 case trap_Breakpoint:
169 handle_breakpoint(signal, code, context);
172 case trap_FunEndBreakpoint:
173 *os_context_pc_addr(context)
174 =(int)handle_fun_end_breakpoint(signal, code, context);
177 case trap_AfterBreakpoint:
178 *skipped_break_addr = trap_Breakpoint;
179 skipped_break_addr = NULL;
180 *(unsigned long *)*os_context_pc_addr(context)
181 = displaced_after_inst;
182 *os_context_sigmask_addr(context)= orig_sigmask;
184 os_flush_icache((os_vm_address_t) *os_context_pc_addr(context),
185 sizeof(unsigned long));
189 interrupt_handle_now(signal, code, context);
193 if (((code >> 26) == 3) && (((code >> 21) & 31) == 24)) {
194 interrupt_internal_error(signal, code, context, 0);
197 interrupt_handle_now(signal, code, context);
201 void arch_install_interrupt_handlers()
203 undoably_install_low_level_interrupt_handler(SIGILL,sigtrap_handler);
204 undoably_install_low_level_interrupt_handler(SIGTRAP,sigtrap_handler);
208 extern lispobj call_into_lisp(lispobj fun, lispobj *args, int nargs);
210 lispobj funcall0(lispobj function)
212 lispobj *args = current_control_stack_pointer;
214 return call_into_lisp(function, args, 0);
217 lispobj funcall1(lispobj function, lispobj arg0)
219 lispobj *args = current_control_stack_pointer;
221 current_control_stack_pointer += 1;
224 return call_into_lisp(function, args, 1);
227 lispobj funcall2(lispobj function, lispobj arg0, lispobj arg1)
229 lispobj *args = current_control_stack_pointer;
231 current_control_stack_pointer += 2;
235 return call_into_lisp(function, args, 2);
238 lispobj funcall3(lispobj function, lispobj arg0, lispobj arg1, lispobj arg2)
240 lispobj *args = current_control_stack_pointer;
242 current_control_stack_pointer += 3;
247 return call_into_lisp(function, args, 3);
251 ppc_flush_icache(os_vm_address_t address, os_vm_size_t length)
253 os_vm_address_t end = (os_vm_address_t) ((int)(address+length+(32-1)) &~(32-1));
254 extern void ppc_flush_cache_line(os_vm_address_t);
256 while (address < end) {
257 ppc_flush_cache_line(address);