#include <stdio.h>
-
+#include <stdlib.h>
#include <signal.h>
#include <sys/file.h>
#include <unistd.h>
#include <errno.h>
#include <sys/param.h>
+#include <sys/utsname.h>
+#include "sbcl.h"
#include "os.h"
#include "arch.h"
#include "interr.h"
#include "interrupt.h"
#include "globals.h"
#include "validate.h"
-#include "sbcl.h"
#include "target-arch-os.h"
+#ifdef LISP_FEATURE_X86
+#include "genesis/static-symbols.h"
+#include "genesis/fdefn.h"
+#endif
+
+#ifdef LISP_FEATURE_GENCGC
+#include "gencgc-internal.h"
+#endif
+
+#if defined LISP_FEATURE_SPARC
#define OS_VM_DEFAULT_PAGESIZE 8192
+#elif defined LISP_FEATURE_X86
+#define OS_VM_DEFAULT_PAGESIZE 4096
+#else
+#error "Don't know OS_VM_DEFAULT_PAGESIZE"
+#endif
long os_vm_page_size=(-1);
static long os_real_page_size=(-1);
static os_vm_size_t real_page_size_difference=0;
+/* So, this sucks. Versions of Solaris prior to 8 (SunOS releases
+ earlier than 5.8) do not support MAP_ANON passed as a flag to
+ mmap(). However, we would like SBCL compiled on SunOS 5.7 but
+ running on 5.8 to use MAP_ANON, but because of C's lack of
+ introspection at runtime, we can't grab the right value because
+ it's stuffed in a header file somewhere. We can, however, hardcode
+ it, and test at runtime for whether to use it... -- CSR, 2002-05-06
+
+ And, in fact, it sucks slightly more, as if you don't use MAP_ANON
+ you need to have /dev/zero open and pass the file descriptor to
+ mmap(). So overall, this counts as a KLUDGE. -- CSR, 2002-05-20 */
+int KLUDGE_MAYBE_MAP_ANON = 0x0;
+int kludge_mmap_fd = -1; /* default for MAP_ANON */
+
void
-os_init(void)
+os_init(char *argv[], char *envp[])
{
+ struct utsname name;
+ int major_version;
+ int minor_version;
+
+ uname(&name);
+ major_version = atoi(name.release);
+ if (major_version != 5) {
+ lose("sunos major version=%d (which isn't 5!)\n", major_version);
+ }
+ minor_version = atoi(name.release+2);
+ if ((minor_version < 8)) {
+ kludge_mmap_fd = open("/dev/zero",O_RDONLY);
+ if (kludge_mmap_fd < 0) {
+ perror("open");
+ lose("Error in open(..)\n");
+ }
+ } else if (minor_version > 11) {
+ FSHOW((stderr, "os_init: Solaris version greater than 11?\nUnknown MAP_ANON behaviour.\n"));
+ lose("Unknown mmap() interaction with MAP_ANON\n");
+ } else {
+ /* Versions 8-11*/
+ KLUDGE_MAYBE_MAP_ANON = 0x100;
+ }
+
/* I do not understand this at all. FIXME. */
os_vm_page_size = os_real_page_size = sysconf(_SC_PAGESIZE);
if(os_vm_page_size>OS_VM_DEFAULT_PAGESIZE){
- fprintf(stderr,"os_init: Pagesize too large (%d > %d)\n",
- os_vm_page_size,OS_VM_DEFAULT_PAGESIZE);
- exit(1);
- }else{
- /*
- * we do this because there are apparently dependencies on
- * the pagesize being OS_VM_DEFAULT_PAGESIZE somewhere...
- * but since the OS doesn't know we're using this restriction,
- * we have to grovel around a bit to enforce it, thus anything
- * that uses real_page_size_difference.
- */
- /* FIXME: Is this still true? */
- real_page_size_difference=OS_VM_DEFAULT_PAGESIZE-os_vm_page_size;
- os_vm_page_size=OS_VM_DEFAULT_PAGESIZE;
+ fprintf(stderr,"os_init: Pagesize too large (%d > %d)\n",
+ os_vm_page_size,OS_VM_DEFAULT_PAGESIZE);
+ exit(1);
+ } else {
+ /*
+ * we do this because there are apparently dependencies on
+ * the pagesize being OS_VM_DEFAULT_PAGESIZE somewhere...
+ * but since the OS doesn't know we're using this restriction,
+ * we have to grovel around a bit to enforce it, thus anything
+ * that uses real_page_size_difference.
+ */
+ /* FIXME: Is this still true? */
+ real_page_size_difference=OS_VM_DEFAULT_PAGESIZE-os_vm_page_size;
+ os_vm_page_size=OS_VM_DEFAULT_PAGESIZE;
}
}
-os_vm_address_t
-os_validate(os_vm_address_t addr, os_vm_size_t len)
+os_vm_address_t os_validate(os_vm_address_t addr, os_vm_size_t len)
{
- int flags = MAP_PRIVATE | MAP_NORESERVE | MAP_ANON;
-
- if (addr)
- flags |= MAP_FIXED;
-
- addr = mmap(addr, len,
- OS_VM_PROT_ALL,
- flags,
- -1, 0);
+ int flags = MAP_PRIVATE | MAP_NORESERVE | KLUDGE_MAYBE_MAP_ANON;
+ if (addr)
+ flags |= MAP_FIXED;
+
+ addr = mmap(addr, len,
+ OS_VM_PROT_ALL,
+ flags,
+ kludge_mmap_fd, 0);
+
if (addr == MAP_FAILED) {
- perror("mmap");
- lose ("Error in mmap(..)");
+ perror("mmap");
+ lose ("Error in mmap(..)\n");
}
-
+
return addr;
}
-void
-os_invalidate(os_vm_address_t addr, os_vm_size_t len)
+void os_invalidate(os_vm_address_t addr, os_vm_size_t len)
{
if(munmap((void*) addr, len) == -1)
- perror("munmap");
+ perror("munmap");
}
\f
{
addr = mmap(addr, len,
- OS_VM_PROT_ALL,
- MAP_PRIVATE | MAP_FIXED,
- fd, (off_t) offset);
+ OS_VM_PROT_ALL,
+ MAP_PRIVATE | MAP_FIXED,
+ fd, (off_t) offset);
if (addr == MAP_FAILED) {
- perror("mmap");
- lose("Unexpedted mmap(..) failure");
+ perror("mmap");
+ lose("Unexpedted mmap(..) failure\n");
}
-
+
return addr;
}
os_protect(os_vm_address_t address, os_vm_size_t length, os_vm_prot_t prot)
{
if(mprotect((void*)address, length, prot) == -1) {
- perror("mprotect");
+ perror("mprotect");
}
}
-static boolean
-in_range_p(os_vm_address_t a, lispobj sbeg, size_t slen)
+static boolean in_range_p(os_vm_address_t a, lispobj sbeg, size_t slen)
{
char* beg = (char*) sbeg;
char* end = (char*) sbeg + slen;
return (adr >= beg && adr < end);
}
-boolean
-is_valid_lisp_addr(os_vm_address_t addr)
+boolean is_valid_lisp_addr(os_vm_address_t addr)
{
- /* Just assume address is valid if it lies within one of the known
+ /* Old CMUCL comment:
+
+ Just assume address is valid if it lies within one of the known
spaces. (Unlike sunos-os which keeps track of every valid page.) */
- return ( in_range_p(addr, READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE)
- || in_range_p(addr, STATIC_SPACE_START , STATIC_SPACE_SIZE )
- || in_range_p(addr, DYNAMIC_0_SPACE_START, DYNAMIC_SPACE_SIZE )
- || in_range_p(addr, DYNAMIC_1_SPACE_START, DYNAMIC_SPACE_SIZE )
- || in_range_p(addr, CONTROL_STACK_START , CONTROL_STACK_SIZE )
- || in_range_p(addr, BINDING_STACK_START , BINDING_STACK_SIZE ));
-}
+ /* FIXME: this looks like a valid definition for all targets with
+ cheney-gc; it may not be impressively smart (witness the
+ comment above) but maybe associating these functions with the
+ GC rather than the OS would be a maintainability win. -- CSR,
+ 2003-04-04 */
+ struct thread *th;
+ if(in_range_p(addr, READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE) ||
+ in_range_p(addr, STATIC_SPACE_START , STATIC_SPACE_SIZE) ||
+#ifdef LISP_FEATURE_GENCGC
+ in_range_p(addr, DYNAMIC_SPACE_START , dynamic_space_size)
+#else
+ in_range_p(addr, DYNAMIC_0_SPACE_START, dynamic_space_size) ||
+ in_range_p(addr, DYNAMIC_1_SPACE_START, dynamic_space_size)
+#endif
+ )
+ return 1;
+ for_each_thread(th) {
+ if((th->control_stack_start <= addr) && (addr < th->control_stack_end))
+ return 1;
+ if(in_range_p(addr, th->binding_stack_start, BINDING_STACK_SIZE))
+ return 1;
+ }
+ return 0;
+}
\f
-#if defined GENCGC
+#if defined LISP_FEATURE_GENCGC
-#error "GENCGC is not yet supported (presumably on x86 solaris?)"
+void
+sigsegv_handler(int signal, siginfo_t *info, void* void_context)
+{
+ os_context_t *context = arch_os_get_context(&void_context);
+ void* fault_addr = (void*)info->si_addr;
+
+ if (!gencgc_handle_wp_violation(fault_addr))
+ if(!handle_guard_page_triggered(context, fault_addr))
+#ifdef LISP_FEATURE_C_STACK_IS_CONTROL_STACK
+ lisp_memory_fault_error(context, fault_addr);
+#else
+ interrupt_handle_now(signal, info, context);
+#endif
+}
#else
sigsegv_handler(int signal, siginfo_t *info, void* void_context)
{
os_context_t *context = arch_os_get_context(&void_context);
- os_vm_address_t addr;
+ os_vm_address_t addr = arch_get_bad_addr(signal, info, context);
- addr = arch_get_bad_addr(signal, info, context);
- /* There's some complicated recovery code in linux-os.c here
- that I'm currently too confused to understand. Fixme. */
- if(!interrupt_maybe_gc(signal, info, context)) {
- interrupt_handle_now(signal, info, context);
+ if (!cheneygc_handle_wp_violation(context, addr)) {
+ if (!handle_guard_page_triggered(context,addr))
+ interrupt_handle_now(signal, info, context);
}
}
void
os_install_interrupt_handlers()
{
- undoably_install_low_level_interrupt_handler(SIGSEGV,sigsegv_handler);
+ undoably_install_low_level_interrupt_handler(SIG_MEMORY_FAULT,
+ sigsegv_handler);
+
+#ifdef LISP_FEATURE_SB_THREAD
+ undoably_install_low_level_interrupt_handler(SIG_STOP_FOR_GC,
+ sig_stop_for_gc_handler);
+#endif
+}
+
+char *
+os_get_runtime_executable_path()
+{
+ int ret;
+ char path[] = "/proc/self/object/a.out";
+
+ ret = access(path, R_OK);
+ if (ret == -1)
+ return NULL;
+
+ return copied_string(path);
}
+