#include "interrupt.h"
#include "interr.h"
#include "breakpoint.h"
+#include "monitor.h"
extern char call_into_lisp_LRA[], call_into_lisp_end[];
extern size_t os_vm_page_size;
#define BREAKPOINT_INST 0x80
-void arch_init(void)
+void
+arch_init(void)
{
- /* this must be called _after_ os_init, so we know what the page size is */
+ /* This must be called _after_ os_init, so we know what the page
+ * size is. */
if(mmap((os_vm_address_t) call_into_lisp_LRA_page,os_vm_page_size,
OS_VM_PROT_ALL,MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED,-1,0)
== (os_vm_address_t) -1)
/* call_into_lisp_LRA is a collection of trampolines written in asm -
* see alpha-assem.S. We copy it to call_into_lisp_LRA_page where
- * VOPs and things can find it (I don't know why they can't find it
- * where it was to start with). */
+ * VOPs and things can find it. (I don't know why they can't find it
+ * where it was to start with.) */
bcopy(call_into_lisp_LRA,(void *)call_into_lisp_LRA_page,os_vm_page_size);
os_flush_icache((os_vm_address_t)call_into_lisp_LRA_page,
os_vm_address_t
arch_get_bad_addr (int sig, siginfo_t *code, os_context_t *context)
{
- unsigned int badinst;
+ unsigned int badinst;
- /* instructions are 32 bit quantities */
- unsigned int *pc ;
- /* fprintf(stderr,"arch_get_bad_addr %d %p %p\n",
- sig, code, context); */
- pc= (unsigned int *)(*os_context_pc_addr(context));
+ /* Instructions are 32 bit quantities. */
+ unsigned int *pc ;
+ /* fprintf(stderr,"arch_get_bad_addr %d %p %p\n",
+ sig, code, context); */
+ pc= (unsigned int *)(*os_context_pc_addr(context));
- if(((unsigned long)pc) & 3)
- return NULL; /* in what case would pc be unaligned? */
+ if(((unsigned long)pc) & 3) {
+ return NULL; /* In what case would pc be unaligned?? */
+ }
- if( (pc < READ_ONLY_SPACE_START ||
- pc >= READ_ONLY_SPACE_START+READ_ONLY_SPACE_SIZE) &&
- (pc < current_dynamic_space ||
- pc >= current_dynamic_space + DYNAMIC_SPACE_SIZE))
- return NULL;
+ if( (pc < READ_ONLY_SPACE_START ||
+ pc >= READ_ONLY_SPACE_START+READ_ONLY_SPACE_SIZE) &&
+ (pc < current_dynamic_space ||
+ pc >= current_dynamic_space + DYNAMIC_SPACE_SIZE))
+ return NULL;
- badinst = *pc;
+ badinst = *pc;
- if(((badinst>>27)!=0x16) /* STL or STQ */
- && ((badinst>>27)!=0x13)) /* STS or STT */
- return NULL; /* Otherwise forget about address */
+ if(((badinst>>27)!=0x16) /* STL or STQ */
+ && ((badinst>>27)!=0x13)) /* STS or STT */
+ return NULL; /* Otherwise forget about address. */
- return (os_vm_address_t)
- (*os_context_register_addr(context,((badinst>>16)&0x1f))
- +(badinst&0xffff));
+ return (os_vm_address_t)
+ (*os_context_register_addr(context,((badinst>>16)&0x1f))
+ +(badinst&0xffff));
}
-void arch_skip_instruction(os_context_t *context)
+void
+arch_skip_instruction(os_context_t *context)
{
- /* this may be complete rubbish, as (at least for traps) pc points
- * _after_ the instruction that caused us to be here anyway
+ /* This may be complete rubbish, as (at least for traps) pc points
+ * _after_ the instruction that caused us to be here anyway.
*/
((char*)*os_context_pc_addr(context)) +=4; }
-unsigned char *arch_internal_error_arguments(os_context_t *context)
+unsigned char *
+arch_internal_error_arguments(os_context_t *context)
{
return (unsigned char *)(*os_context_pc_addr(context)+4);
}
-boolean arch_pseudo_atomic_atomic(os_context_t *context)
+boolean
+arch_pseudo_atomic_atomic(os_context_t *context)
{
- return ((*os_context_register_addr(context,reg_ALLOC)) & 1);
+ return ((*os_context_register_addr(context,reg_ALLOC)) & 1);
}
void arch_set_pseudo_atomic_interrupted(os_context_t *context)
void arch_remove_breakpoint(void *pc, unsigned long orig_inst)
{
/* was (unsigned int) but gcc complains. Changed to mirror
- install_breakpoint above */
+ * install_breakpoint() above */
unsigned long *ptr=(unsigned long *)pc;
*ptr = orig_inst;
os_flush_icache((os_vm_address_t)pc, sizeof(unsigned long));
after_breakpoint;
-/* Returns a PC value. Lisp code is all in the 32-bit-addressable
- space,so we should be ok with an unsigned int */
-
+/* This returns a PC value. Lisp code is all in the 32-bit-addressable
+ * space,so we should be ok with an unsigned int. */
unsigned int
emulate_branch(os_context_t *context,unsigned long orig_inst)
{
orig_sigmask = *os_context_sigmask_addr(context);
sigaddset_blockable(os_context_sigmask_addr(context));
- /* Figure out where the displaced inst is going */
+ /* Figure out where the displaced inst is going. */
if(op == 0x1a || (op&0xf) == 0x30) /* branch...ugh */
- /* the cast to long is just to shut gcc up */
+ /* The cast to long is just to shut gcc up. */
next_pc = (unsigned int *)((long)emulate_branch(context,orig_inst));
else
next_pc = pc+1;
os_flush_icache((os_vm_address_t)pc, sizeof(unsigned long));
skipped_break_addr = pc;
- /* set the after breakpoint */
+ /* Set the after breakpoint. */
displaced_after_inst = *next_pc;
*next_pc = BREAKPOINT_INST;
after_breakpoint=1;
os_flush_icache((os_vm_address_t)next_pc, sizeof(unsigned long));
- ldb_monitor("sigreturn is not implemented and just failed");
+ ldb_monitor();
sigreturn(context);
}
#define AfterBreakpoint 100
-static void sigill_handler(int signal, siginfo_t *siginfo, os_context_t *context) {
+static void
+sigill_handler(int signal, siginfo_t *siginfo, os_context_t *context) {
fake_foreign_function_call(context);
ldb_monitor();
}
-static void sigtrap_handler(int signal, siginfo_t *siginfo, os_context_t *context)
+static void
+sigtrap_handler(int signal, siginfo_t *siginfo, os_context_t *context)
{
/* Don't disallow recursive breakpoint traps. Otherwise, we can't */
/* use debugger breakpoints anywhere in here. */
/* This is apparently called by emulate_branch, but isn't defined. So */
/* just do nothing and hope it works... */
-
void cacheflush(void)
{
/* hoping probably isn't _actually_ enough. we should call_pal imb,
projects / sbcl.git / blobdiff