#include <sys/mman.h>
#include <sys/user.h>
#include <sys/time.h>
-#include <asm/unistd.h>
+#include <sys/syscall.h>
#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)
{
if((n < 0) || !WIFSTOPPED(status) ||
(WSTOPSIG(status) != SIGUSR1 && WSTOPSIG(status) != SIGTRAP)){
- unsigned long regs[HOST_FRAME_SIZE];
+ unsigned long regs[MAX_REG_NR];
if(ptrace(PTRACE_GETREGS, pid, 0, regs) < 0)
printk("Failed to get registers from stub, "
int i;
printk("Stub registers -\n");
- for(i = 0; i < HOST_FRAME_SIZE; i++)
+ for(i = 0; i < ARRAY_SIZE(regs); i++)
printk("\t%d - %lx\n", i, regs[i]);
}
panic("%s : failed to wait for SIGUSR1/SIGTRAP, "
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;
.offset = code_offset
} } });
n = os_write_file(fd, &mmop, sizeof(mmop));
- if(n != sizeof(mmop))
+ if(n != sizeof(mmop)){
+ 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);
+ }
if ( stack ) {
__u64 map_offset;
}
}
-void new_thread(void *stack, void **switch_buf_ptr, void **fork_buf_ptr,
- void (*handler)(int))
+void new_thread(void *stack, jmp_buf *buf, void (*handler)(void))
{
- unsigned long flags;
- jmp_buf switch_buf, fork_buf;
-
- *switch_buf_ptr = &switch_buf;
- *fork_buf_ptr = &fork_buf;
-
- /* Somewhat subtle - siglongjmp restores the signal mask before doing
- * the longjmp. This means that when jumping from one stack to another
- * when the target stack has interrupts enabled, an interrupt may occur
- * on the source stack. This is bad when starting up a process because
- * it's not supposed to get timer ticks until it has been scheduled.
- * So, we disable interrupts around the sigsetjmp to ensure that
- * they can't happen until we get back here where they are safe.
- */
- flags = get_signals();
- block_signals();
- if(UML_SETJMP(&fork_buf) == 0)
- new_thread_proc(stack, handler);
-
- remove_sigstack();
-
- set_signals(flags);
+ (*buf)[0].JB_IP = (unsigned long) handler;
+ (*buf)[0].JB_SP = (unsigned long) stack +
+ (PAGE_SIZE << UML_CONFIG_KERNEL_STACK_ORDER) - sizeof(void *);
}
#define INIT_JMP_NEW_THREAD 0
-#define INIT_JMP_REMOVE_SIGSTACK 1
-#define INIT_JMP_CALLBACK 2
-#define INIT_JMP_HALT 3
-#define INIT_JMP_REBOOT 4
+#define INIT_JMP_CALLBACK 1
+#define INIT_JMP_HALT 2
+#define INIT_JMP_REBOOT 3
-void thread_wait(void *sw, void *fb)
+void switch_threads(jmp_buf *me, jmp_buf *you)
{
- jmp_buf buf, **switch_buf = sw, *fork_buf;
-
- *switch_buf = &buf;
- fork_buf = fb;
- if(UML_SETJMP(&buf) == 0)
- UML_LONGJMP(fork_buf, INIT_JMP_REMOVE_SIGSTACK);
-}
-
-void switch_threads(void *me, void *next)
-{
- jmp_buf my_buf, **me_ptr = me, *next_buf = next;
-
- *me_ptr = &my_buf;
- if(UML_SETJMP(&my_buf) == 0)
- UML_LONGJMP(next_buf, 1);
+ if(UML_SETJMP(me) == 0)
+ UML_LONGJMP(you, 1);
}
static jmp_buf initial_jmpbuf;
static void *cb_arg;
static jmp_buf *cb_back;
-int start_idle_thread(void *stack, void *switch_buf_ptr, void **fork_buf_ptr)
+int start_idle_thread(void *stack, jmp_buf *switch_buf)
{
- jmp_buf **switch_buf = switch_buf_ptr;
int n;
set_handler(SIGWINCH, (__sighandler_t) sig_handler,
SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGALRM,
SIGVTALRM, -1);
- *fork_buf_ptr = &initial_jmpbuf;
n = UML_SETJMP(&initial_jmpbuf);
switch(n){
case INIT_JMP_NEW_THREAD:
- new_thread_proc((void *) stack, new_thread_handler);
- break;
- case INIT_JMP_REMOVE_SIGSTACK:
- remove_sigstack();
+ (*switch_buf)[0].JB_IP = (unsigned long) new_thread_handler;
+ (*switch_buf)[0].JB_SP = (unsigned long) stack +
+ (PAGE_SIZE << UML_CONFIG_KERNEL_STACK_ORDER) -
+ sizeof(void *);
break;
case INIT_JMP_CALLBACK:
(*cb_proc)(cb_arg);
default:
panic("Bad sigsetjmp return in start_idle_thread - %d\n", n);
}
- UML_LONGJMP(*switch_buf, 1);
+ UML_LONGJMP(switch_buf, 1);
}
void initial_thread_cb_skas(void (*proc)(void *), void *arg)
projects / powerpc.git / blobdiff