#include "gencgc.h"
#endif
\f
+
+#ifdef sparc
+int early_kernel = 0;
+#endif
void os_init(void)
{
/* Early versions of Linux don't support the mmap(..) functionality
{
struct utsname name;
int major_version;
+#ifdef sparc
+ int minor_version;
+#endif
uname(&name);
major_version = atoi(name.release);
if (major_version < 2) {
lose("linux major version=%d (can't run in version < 2.0.0)",
major_version);
}
+#ifdef sparc
+ /* KLUDGE: This will break if Linux moves to a uname() version number
+ * that has more than one digit initially -- CSR, 2002-02-12 */
+ minor_version = atoi(name.release+2);
+ if (minor_version < 4) {
+ FSHOW((stderr,"linux minor version=%d;\n enabling workarounds for SPARC kernel bugs in signal handling.\n", minor_version));
+ early_kernel = 1;
+ }
+#endif
}
os_vm_page_size = getpagesize();
- /* this could just as well be in arch_init, but it's not */
-#ifdef i386
+ /* This could just as well be in arch_init(), but it's not. */
+#ifdef __i386__
SET_FPU_CONTROL_WORD(0x1372|4|8|16|32); /* no interrupts */
#endif
}
static int
do_mmap(os_vm_address_t *addr, os_vm_size_t len, int flags)
{
- /* We *must* have the memory where we want it. */
- os_vm_address_t old_addr=*addr;
+ /* We *must* have the memory where we expect it. */
+ os_vm_address_t old_addr = *addr;
*addr = mmap(*addr, len, OS_VM_PROT_ALL, flags, -1, 0);
if (*addr == MAP_FAILED ||
((old_addr != NULL) && (*addr != old_addr))) {
FSHOW((stderr,
- "error in allocating memory from the OS\n"
- "(addr=%lx, len=%lx, flags=%lx)\n",
+ "/retryable error in allocating memory from the OS\n"
+ "(addr=0x%lx, len=0x%lx, flags=0x%lx)\n",
(long) addr,
(long) len,
(long) flags));
MAP_PRIVATE | MAP_FILE | MAP_FIXED,
fd, (off_t) offset);
- if(addr == MAP_FAILED) {
+ if (addr == MAP_FAILED) {
perror("mmap");
lose("unexpected mmap(..) failure");
}
void
sigsegv_handler(int signal, siginfo_t *info, void* void_context)
{
- os_context_t *context = (os_context_t*)void_context;
+ os_context_t *context = arch_os_get_context(&void_context);
void* fault_addr = (void*)context->uc_mcontext.cr2;
if (!gencgc_handle_wp_violation(fault_addr)) {
interrupt_handle_now(signal, info, void_context);
static void
sigsegv_handler(int signal, siginfo_t *info, void* void_context)
{
- os_context_t *context = (os_context_t*)void_context;
+ os_context_t *context = arch_os_get_context(&void_context);
os_vm_address_t addr;
-#ifdef i386
+#ifdef __i386__
interrupt_handle_now(signal,contextstruct);
#else
-#define CONTROL_STACK_TOP (((char*)CONTROL_STACK_START)+CONTROL_STACK_SIZE)
+ char *control_stack_top = (char*)CONTROL_STACK_START + CONTROL_STACK_SIZE;
addr = arch_get_bad_addr(signal,info,context);
- if(addr != NULL &&
+ if (addr != NULL &&
*os_context_register_addr(context,reg_ALLOC) & (1L<<63)){
/* This is the end of a pseudo-atomic section during which
* a signal was received. We must deal with the pending interrupt
*/
*os_context_register_addr(context,reg_ALLOC) -= (1L<<63);
interrupt_handle_pending(context);
- } else if (addr > CONTROL_STACK_TOP && addr < BINDING_STACK_START) {
- fprintf(stderr, "Possible stack overflow at 0x%016lX: CONTROL_STACK_TOP=%lx, BINDING_STACK_START=%lx\n",addr, CONTROL_STACK_TOP,BINDING_STACK_START);
- /* try to fix control frame pointer */
+ } else if (addr > control_stack_top && addr < BINDING_STACK_START) {
+ fprintf(stderr,
+ "Possible stack overflow at 0x%016lX:\n"
+ "control_stack_top=%lx, BINDING_STACK_START=%lx\n",
+ addr,
+ control_stack_top,
+ BINDING_STACK_START);
+ /* Try to fix control frame pointer. */
while ( ! (CONTROL_STACK_START <= *current_control_frame_pointer &&
- *current_control_frame_pointer <= CONTROL_STACK_TOP))
+ *current_control_frame_pointer <= control_stack_top))
((char*)current_control_frame_pointer) -= sizeof(lispobj);
- ldb_monitor();
+ monitor_or_something();
} else if (!interrupt_maybe_gc(signal, info, context)) {
interrupt_handle_now(signal, info, context);
}
}
#endif
-
-
void
os_install_interrupt_handlers(void)
{
- interrupt_install_low_level_handler(SIGSEGV, sigsegv_handler);
+ undoably_install_low_level_interrupt_handler(SIGSEGV, sigsegv_handler);
}