#include <asm/types.h>
#include "user.h"
#include "sysdep/ptrace.h"
-#include "user_util.h"
#include "kern_util.h"
#include "skas.h"
#include "stub-data.h"
#include "uml-config.h"
#include "process.h"
#include "longjmp.h"
+#include "kern_constants.h"
int is_skas_winch(int pid, int fd, void *data)
{
return(1);
}
+static int ptrace_dump_regs(int pid)
+{
+ unsigned long regs[MAX_REG_NR];
+ int i;
+
+ if(ptrace(PTRACE_GETREGS, pid, 0, regs) < 0)
+ return -errno;
+ else {
+ printk("Stub registers -\n");
+ for(i = 0; i < ARRAY_SIZE(regs); i++)
+ printk("\t%d - %lx\n", i, regs[i]);
+ }
+
+ return 0;
+}
+
void wait_stub_done(int pid, int sig, char * fname)
{
int n, status, err;
if((n < 0) || !WIFSTOPPED(status) ||
(WSTOPSIG(status) != SIGUSR1 && WSTOPSIG(status) != SIGTRAP)){
- unsigned long regs[HOST_FRAME_SIZE];
-
- if(ptrace(PTRACE_GETREGS, pid, 0, regs) < 0)
+ err = ptrace_dump_regs(pid);
+ if(err)
printk("Failed to get registers from stub, "
- "errno = %d\n", errno);
- else {
- int i;
-
- printk("Stub registers -\n");
- for(i = 0; i < HOST_FRAME_SIZE; i++)
- printk("\t%d - %lx\n", i, regs[i]);
- }
+ "errno = %d\n", -err);
panic("%s : failed to wait for SIGUSR1/SIGTRAP, "
"pid = %d, n = %d, errno = %d, status = 0x%x\n",
fname, pid, n, errno, status);
CATCH_EINTR(err = waitpid(pid, &status, WUNTRACED));
if((err < 0) || !WIFSTOPPED(status) ||
- (WSTOPSIG(status) != SIGTRAP + 0x80))
+ (WSTOPSIG(status) != SIGTRAP + 0x80)){
+ err = ptrace_dump_regs(pid);
+ if(err)
+ printk("Failed to get registers from process, "
+ "errno = %d\n", -err);
panic("handle_trap - failed to wait at end of syscall, "
"errno = %d, status = %d\n", errno, status);
+ }
}
handle_syscall(regs);
int fd;
__u64 offset;
fd = phys_mapping(to_phys(&__syscall_stub_start), &offset);
- addr = mmap64((void *) UML_CONFIG_STUB_CODE, page_size(),
+ addr = mmap64((void *) UML_CONFIG_STUB_CODE, UM_KERN_PAGE_SIZE,
PROT_EXEC, MAP_FIXED | MAP_PRIVATE, fd, offset);
if(addr == MAP_FAILED){
printk("mapping mmap stub failed, errno = %d\n",
if(stack != NULL){
fd = phys_mapping(to_phys(stack), &offset);
- addr = mmap((void *) UML_CONFIG_STUB_DATA, page_size(),
- PROT_READ | PROT_WRITE,
+ addr = mmap((void *) UML_CONFIG_STUB_DATA,
+ UM_KERN_PAGE_SIZE, PROT_READ | PROT_WRITE,
MAP_FIXED | MAP_SHARED, fd, offset);
if(addr == MAP_FAILED){
printk("mapping segfault stack failed, "
(unsigned long) stub_segv_handler -
(unsigned long) &__syscall_stub_start;
- set_sigstack((void *) UML_CONFIG_STUB_DATA, page_size());
+ set_sigstack((void *) UML_CONFIG_STUB_DATA, UM_KERN_PAGE_SIZE);
sigemptyset(&sa.sa_mask);
sigaddset(&sa.sa_mask, SIGIO);
sigaddset(&sa.sa_mask, SIGWINCH);
int copy_context_skas0(unsigned long new_stack, int pid)
{
int err;
- unsigned long regs[HOST_FRAME_SIZE];
+ unsigned long regs[MAX_REG_NR];
unsigned long fp_regs[HOST_FP_SIZE];
unsigned long current_stack = current_stub_stack();
struct stub_data *data = (struct stub_data *) current_stack;
/*
* This is used only, if stub pages are needed, while proc_mm is
- * availabl. Opening /proc/mm creates a new mm_context, which lacks
+ * available. Opening /proc/mm creates a new mm_context, which lacks
* the stub-pages. Thus, we map them using /proc/mm-fd
*/
void map_stub_pages(int fd, unsigned long code,
.fd = code_fd,
.offset = code_offset
} } });
- n = os_write_file(fd, &mmop, sizeof(mmop));
- if(n != sizeof(mmop))
+ CATCH_EINTR(n = write(fd, &mmop, sizeof(mmop)));
+ if(n != sizeof(mmop)){
+ n = errno;
+ printk("mmap args - addr = 0x%lx, fd = %d, offset = %llx\n",
+ code, code_fd, (unsigned long long) code_offset);
panic("map_stub_pages : /proc/mm map for code failed, "
- "err = %d\n", -n);
+ "err = %d\n", n);
+ }
if ( stack ) {
__u64 map_offset;
.fd = map_fd,
.offset = map_offset
} } });
- n = os_write_file(fd, &mmop, sizeof(mmop));
+ CATCH_EINTR(n = write(fd, &mmop, sizeof(mmop)));
if(n != sizeof(mmop))
panic("map_stub_pages : /proc/mm map for data failed, "
- "err = %d\n", -n);
+ "err = %d\n", errno);
}
}
SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGALRM,
SIGVTALRM, -1);
- n = UML_SETJMP(&initial_jmpbuf);
+ /*
+ * Can't use UML_SETJMP or UML_LONGJMP here because they save
+ * and restore signals, with the possible side-effect of
+ * trying to handle any signals which came when they were
+ * blocked, which can't be done on this stack.
+ * Signals must be blocked when jumping back here and restored
+ * after returning to the jumper.
+ */
+ n = setjmp(initial_jmpbuf);
switch(n){
case INIT_JMP_NEW_THREAD:
(*switch_buf)[0].JB_IP = (unsigned long) new_thread_handler;
break;
case INIT_JMP_CALLBACK:
(*cb_proc)(cb_arg);
- UML_LONGJMP(cb_back, 1);
+ longjmp(*cb_back, 1);
break;
case INIT_JMP_HALT:
kmalloc_ok = 0;
default:
panic("Bad sigsetjmp return in start_idle_thread - %d\n", n);
}
- UML_LONGJMP(switch_buf, 1);
+ longjmp(*switch_buf, 1);
}
void initial_thread_cb_skas(void (*proc)(void *), void *arg)
Code Review / linux-2.6.git / blobdiff