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-rw-r--r--arch/um/kernel/skas/Makefile8
-rw-r--r--arch/um/kernel/skas/include/mm_id.h17
-rw-r--r--arch/um/kernel/skas/include/mmu-skas.h35
-rw-r--r--arch/um/kernel/skas/include/mode-skas.h33
-rw-r--r--arch/um/kernel/skas/include/mode_kern-skas.h52
-rw-r--r--arch/um/kernel/skas/include/proc_mm.h55
-rw-r--r--arch/um/kernel/skas/include/skas.h50
-rw-r--r--arch/um/kernel/skas/include/stub-data.h18
-rw-r--r--arch/um/kernel/skas/include/uaccess-skas.h32
-rw-r--r--arch/um/kernel/skas/mem_user.c281
-rw-r--r--arch/um/kernel/skas/mmu.c8
-rw-r--r--arch/um/kernel/skas/process.c581
-rw-r--r--arch/um/kernel/skas/process_kern.c40
-rw-r--r--arch/um/kernel/skas/trap_user.c78
-rw-r--r--arch/um/kernel/skas/uaccess.c2
15 files changed, 19 insertions, 1271 deletions
diff --git a/arch/um/kernel/skas/Makefile b/arch/um/kernel/skas/Makefile
index 8de471b..57181a9 100644
--- a/arch/um/kernel/skas/Makefile
+++ b/arch/um/kernel/skas/Makefile
@@ -1,12 +1,12 @@
-#
+#
# Copyright (C) 2002 - 2004 Jeff Dike (jdike@addtoit.com)
# Licensed under the GPL
#
-obj-y := clone.o exec_kern.o mem.o mem_user.o mmu.o process.o process_kern.o \
- syscall.o tlb.o trap_user.o uaccess.o
+obj-y := clone.o exec_kern.o mem.o mmu.o process_kern.o \
+ syscall.o tlb.o uaccess.o
-USER_OBJS := process.o clone.o
+USER_OBJS := clone.o
include arch/um/scripts/Makefile.rules
diff --git a/arch/um/kernel/skas/include/mm_id.h b/arch/um/kernel/skas/include/mm_id.h
deleted file mode 100644
index 48dd098..0000000
--- a/arch/um/kernel/skas/include/mm_id.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * Copyright (C) 2005 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#ifndef __MM_ID_H
-#define __MM_ID_H
-
-struct mm_id {
- union {
- int mm_fd;
- int pid;
- } u;
- unsigned long stack;
-};
-
-#endif
diff --git a/arch/um/kernel/skas/include/mmu-skas.h b/arch/um/kernel/skas/include/mmu-skas.h
deleted file mode 100644
index 44110c5..0000000
--- a/arch/um/kernel/skas/include/mmu-skas.h
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#ifndef __SKAS_MMU_H
-#define __SKAS_MMU_H
-
-#include "linux/config.h"
-#include "mm_id.h"
-#include "asm/ldt.h"
-
-struct mmu_context_skas {
- struct mm_id id;
- unsigned long last_page_table;
-#ifdef CONFIG_3_LEVEL_PGTABLES
- unsigned long last_pmd;
-#endif
- uml_ldt_t ldt;
-};
-
-extern void switch_mm_skas(struct mm_id * mm_idp);
-
-#endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/skas/include/mode-skas.h b/arch/um/kernel/skas/include/mode-skas.h
deleted file mode 100644
index bcd26a6..0000000
--- a/arch/um/kernel/skas/include/mode-skas.h
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#ifndef __MODE_SKAS_H__
-#define __MODE_SKAS_H__
-
-#include <sysdep/ptrace.h>
-
-extern unsigned long exec_regs[];
-extern unsigned long exec_fp_regs[];
-extern unsigned long exec_fpx_regs[];
-extern int have_fpx_regs;
-
-extern void sig_handler_common_skas(int sig, void *sc_ptr);
-extern void halt_skas(void);
-extern void reboot_skas(void);
-extern void kill_off_processes_skas(void);
-extern int is_skas_winch(int pid, int fd, void *data);
-
-#endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/skas/include/mode_kern-skas.h b/arch/um/kernel/skas/include/mode_kern-skas.h
deleted file mode 100644
index c97a80d..0000000
--- a/arch/um/kernel/skas/include/mode_kern-skas.h
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#ifndef __SKAS_MODE_KERN_H__
-#define __SKAS_MODE_KERN_H__
-
-#include "linux/sched.h"
-#include "asm/page.h"
-#include "asm/ptrace.h"
-
-extern void flush_thread_skas(void);
-extern void switch_to_skas(void *prev, void *next);
-extern void start_thread_skas(struct pt_regs *regs, unsigned long eip,
- unsigned long esp);
-extern int copy_thread_skas(int nr, unsigned long clone_flags,
- unsigned long sp, unsigned long stack_top,
- struct task_struct *p, struct pt_regs *regs);
-extern void release_thread_skas(struct task_struct *task);
-extern void initial_thread_cb_skas(void (*proc)(void *), void *arg);
-extern void init_idle_skas(void);
-extern void flush_tlb_kernel_range_skas(unsigned long start,
- unsigned long end);
-extern void flush_tlb_kernel_vm_skas(void);
-extern void __flush_tlb_one_skas(unsigned long addr);
-extern void flush_tlb_range_skas(struct vm_area_struct *vma,
- unsigned long start, unsigned long end);
-extern void flush_tlb_mm_skas(struct mm_struct *mm);
-extern void force_flush_all_skas(void);
-extern long execute_syscall_skas(void *r);
-extern void before_mem_skas(unsigned long unused);
-extern unsigned long set_task_sizes_skas(int arg, unsigned long *host_size_out,
- unsigned long *task_size_out);
-extern int start_uml_skas(void);
-extern int external_pid_skas(struct task_struct *task);
-extern int thread_pid_skas(struct task_struct *task);
-
-#define kmem_end_skas (host_task_size - 1024 * 1024)
-
-#endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/skas/include/proc_mm.h b/arch/um/kernel/skas/include/proc_mm.h
deleted file mode 100644
index cce61a6..0000000
--- a/arch/um/kernel/skas/include/proc_mm.h
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#ifndef __SKAS_PROC_MM_H
-#define __SKAS_PROC_MM_H
-
-#define MM_MMAP 54
-#define MM_MUNMAP 55
-#define MM_MPROTECT 56
-#define MM_COPY_SEGMENTS 57
-
-struct mm_mmap {
- unsigned long addr;
- unsigned long len;
- unsigned long prot;
- unsigned long flags;
- unsigned long fd;
- unsigned long offset;
-};
-
-struct mm_munmap {
- unsigned long addr;
- unsigned long len;
-};
-
-struct mm_mprotect {
- unsigned long addr;
- unsigned long len;
- unsigned int prot;
-};
-
-struct proc_mm_op {
- int op;
- union {
- struct mm_mmap mmap;
- struct mm_munmap munmap;
- struct mm_mprotect mprotect;
- int copy_segments;
- } u;
-};
-
-#endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/skas/include/skas.h b/arch/um/kernel/skas/include/skas.h
deleted file mode 100644
index daa2f85..0000000
--- a/arch/um/kernel/skas/include/skas.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#ifndef __SKAS_H
-#define __SKAS_H
-
-#include "mm_id.h"
-#include "sysdep/ptrace.h"
-
-extern int userspace_pid[];
-extern int proc_mm, ptrace_faultinfo, ptrace_ldt;
-extern int skas_needs_stub;
-
-extern void switch_threads(void *me, void *next);
-extern void thread_wait(void *sw, void *fb);
-extern void new_thread(void *stack, void **switch_buf_ptr, void **fork_buf_ptr,
- void (*handler)(int));
-extern int start_idle_thread(void *stack, void *switch_buf_ptr,
- void **fork_buf_ptr);
-extern int user_thread(unsigned long stack, int flags);
-extern void userspace(union uml_pt_regs *regs);
-extern void new_thread_proc(void *stack, void (*handler)(int sig));
-extern void remove_sigstack(void);
-extern void new_thread_handler(int sig);
-extern void handle_syscall(union uml_pt_regs *regs);
-extern int map(struct mm_id * mm_idp, unsigned long virt,
- unsigned long len, int r, int w, int x, int phys_fd,
- unsigned long long offset, int done, void **data);
-extern int unmap(struct mm_id * mm_idp, void *addr, unsigned long len,
- int done, void **data);
-extern int protect(struct mm_id * mm_idp, unsigned long addr,
- unsigned long len, int r, int w, int x, int done,
- void **data);
-extern void user_signal(int sig, union uml_pt_regs *regs, int pid);
-extern int new_mm(int from, unsigned long stack);
-extern int start_userspace(unsigned long stub_stack);
-extern int copy_context_skas0(unsigned long stack, int pid);
-extern void get_skas_faultinfo(int pid, struct faultinfo * fi);
-extern long execute_syscall_skas(void *r);
-extern unsigned long current_stub_stack(void);
-extern long run_syscall_stub(struct mm_id * mm_idp,
- int syscall, unsigned long *args, long expected,
- void **addr, int done);
-extern long syscall_stub_data(struct mm_id * mm_idp,
- unsigned long *data, int data_count,
- void **addr, void **stub_addr);
-
-#endif
diff --git a/arch/um/kernel/skas/include/stub-data.h b/arch/um/kernel/skas/include/stub-data.h
deleted file mode 100644
index f6ed92c..0000000
--- a/arch/um/kernel/skas/include/stub-data.h
+++ /dev/null
@@ -1,18 +0,0 @@
-/*
- * Copyright (C) 2005 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#ifndef __STUB_DATA_H
-#define __STUB_DATA_H
-
-#include <sys/time.h>
-
-struct stub_data {
- long offset;
- int fd;
- struct itimerval timer;
- long err;
-};
-
-#endif
diff --git a/arch/um/kernel/skas/include/uaccess-skas.h b/arch/um/kernel/skas/include/uaccess-skas.h
deleted file mode 100644
index 64516c5..0000000
--- a/arch/um/kernel/skas/include/uaccess-skas.h
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#ifndef __SKAS_UACCESS_H
-#define __SKAS_UACCESS_H
-
-#include "asm/errno.h"
-
-/* No SKAS-specific checking. */
-#define access_ok_skas(type, addr, size) 0
-
-extern int copy_from_user_skas(void *to, const void __user *from, int n);
-extern int copy_to_user_skas(void __user *to, const void *from, int n);
-extern int strncpy_from_user_skas(char *dst, const char __user *src, int count);
-extern int __clear_user_skas(void __user *mem, int len);
-extern int clear_user_skas(void __user *mem, int len);
-extern int strnlen_user_skas(const void __user *str, int len);
-
-#endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/skas/mem_user.c b/arch/um/kernel/skas/mem_user.c
deleted file mode 100644
index 1d89640..0000000
--- a/arch/um/kernel/skas/mem_user.c
+++ /dev/null
@@ -1,281 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include <signal.h>
-#include <errno.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <sys/wait.h>
-#include <asm/page.h>
-#include <asm/unistd.h>
-#include "mem_user.h"
-#include "mem.h"
-#include "skas.h"
-#include "user.h"
-#include "os.h"
-#include "proc_mm.h"
-#include "ptrace_user.h"
-#include "user_util.h"
-#include "kern_util.h"
-#include "task.h"
-#include "registers.h"
-#include "uml-config.h"
-#include "sysdep/ptrace.h"
-#include "sysdep/stub.h"
-
-extern unsigned long batch_syscall_stub, __syscall_stub_start;
-
-extern void wait_stub_done(int pid, int sig, char * fname);
-
-static inline unsigned long *check_init_stack(struct mm_id * mm_idp,
- unsigned long *stack)
-{
- if(stack == NULL){
- stack = (unsigned long *) mm_idp->stack + 2;
- *stack = 0;
- }
- return stack;
-}
-
-extern int proc_mm;
-
-int single_count = 0;
-int multi_count = 0;
-int multi_op_count = 0;
-
-static long do_syscall_stub(struct mm_id *mm_idp, void **addr)
-{
- unsigned long regs[MAX_REG_NR];
- unsigned long *data;
- unsigned long *syscall;
- long ret, offset;
- int n, pid = mm_idp->u.pid;
-
- if(proc_mm)
-#warning Need to look up userspace_pid by cpu
- pid = userspace_pid[0];
-
- multi_count++;
-
- get_safe_registers(regs);
- regs[REGS_IP_INDEX] = UML_CONFIG_STUB_CODE +
- ((unsigned long) &batch_syscall_stub -
- (unsigned long) &__syscall_stub_start);
- n = ptrace_setregs(pid, regs);
- if(n < 0)
- panic("do_syscall_stub : PTRACE_SETREGS failed, errno = %d\n",
- n);
-
- wait_stub_done(pid, 0, "do_syscall_stub");
-
- /* When the stub stops, we find the following values on the
- * beginning of the stack:
- * (long )return_value
- * (long )offset to failed sycall-data (0, if no error)
- */
- ret = *((unsigned long *) mm_idp->stack);
- offset = *((unsigned long *) mm_idp->stack + 1);
- if (offset) {
- data = (unsigned long *)(mm_idp->stack +
- offset - UML_CONFIG_STUB_DATA);
- syscall = (unsigned long *)((unsigned long)data + data[0]);
- printk("do_syscall_stub: syscall %ld failed, return value = "
- "0x%lx, expected return value = 0x%lx\n",
- syscall[0], ret, syscall[7]);
- printk(" syscall parameters: "
- "0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx\n",
- syscall[1], syscall[2], syscall[3],
- syscall[4], syscall[5], syscall[6]);
- for(n = 1; n < data[0]/sizeof(long); n++) {
- if(n == 1)
- printk(" additional syscall data:");
- if(n % 4 == 1)
- printk("\n ");
- printk(" 0x%lx", data[n]);
- }
- if(n > 1)
- printk("\n");
- }
- else ret = 0;
-
- *addr = check_init_stack(mm_idp, NULL);
-
- return ret;
-}
-
-long run_syscall_stub(struct mm_id * mm_idp, int syscall,
- unsigned long *args, long expected, void **addr,
- int done)
-{
- unsigned long *stack = check_init_stack(mm_idp, *addr);
-
- if(done && *addr == NULL)
- single_count++;
-
- *stack += sizeof(long);
- stack += *stack / sizeof(long);
-
- *stack++ = syscall;
- *stack++ = args[0];
- *stack++ = args[1];
- *stack++ = args[2];
- *stack++ = args[3];
- *stack++ = args[4];
- *stack++ = args[5];
- *stack++ = expected;
- *stack = 0;
- multi_op_count++;
-
- if(!done && ((((unsigned long) stack) & ~PAGE_MASK) <
- PAGE_SIZE - 10 * sizeof(long))){
- *addr = stack;
- return 0;
- }
-
- return do_syscall_stub(mm_idp, addr);
-}
-
-long syscall_stub_data(struct mm_id * mm_idp,
- unsigned long *data, int data_count,
- void **addr, void **stub_addr)
-{
- unsigned long *stack;
- int ret = 0;
-
- /* If *addr still is uninitialized, it *must* contain NULL.
- * Thus in this case do_syscall_stub correctly won't be called.
- */
- if((((unsigned long) *addr) & ~PAGE_MASK) >=
- PAGE_SIZE - (10 + data_count) * sizeof(long)) {
- ret = do_syscall_stub(mm_idp, addr);
- /* in case of error, don't overwrite data on stack */
- if(ret)
- return ret;
- }
-
- stack = check_init_stack(mm_idp, *addr);
- *addr = stack;
-
- *stack = data_count * sizeof(long);
-
- memcpy(stack + 1, data, data_count * sizeof(long));
-
- *stub_addr = (void *)(((unsigned long)(stack + 1) & ~PAGE_MASK) +
- UML_CONFIG_STUB_DATA);
-
- return 0;
-}
-
-int map(struct mm_id * mm_idp, unsigned long virt, unsigned long len,
- int r, int w, int x, int phys_fd, unsigned long long offset,
- int done, void **data)
-{
- int prot, ret;
-
- prot = (r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) |
- (x ? PROT_EXEC : 0);
-
- if(proc_mm){
- struct proc_mm_op map;
- int fd = mm_idp->u.mm_fd;
-
- map = ((struct proc_mm_op) { .op = MM_MMAP,
- .u =
- { .mmap =
- { .addr = virt,
- .len = len,
- .prot = prot,
- .flags = MAP_SHARED |
- MAP_FIXED,
- .fd = phys_fd,
- .offset= offset
- } } } );
- ret = os_write_file(fd, &map, sizeof(map));
- if(ret != sizeof(map))
- printk("map : /proc/mm map failed, err = %d\n", -ret);
- else ret = 0;
- }
- else {
- unsigned long args[] = { virt, len, prot,
- MAP_SHARED | MAP_FIXED, phys_fd,
- MMAP_OFFSET(offset) };
-
- ret = run_syscall_stub(mm_idp, STUB_MMAP_NR, args, virt,
- data, done);
- }
-
- return ret;
-}
-
-int unmap(struct mm_id * mm_idp, void *addr, unsigned long len, int done,
- void **data)
-{
- int ret;
-
- if(proc_mm){
- struct proc_mm_op unmap;
- int fd = mm_idp->u.mm_fd;
-
- unmap = ((struct proc_mm_op) { .op = MM_MUNMAP,
- .u =
- { .munmap =
- { .addr =
- (unsigned long) addr,
- .len = len } } } );
- ret = os_write_file(fd, &unmap, sizeof(unmap));
- if(ret != sizeof(unmap))
- printk("unmap - proc_mm write returned %d\n", ret);
- else ret = 0;
- }
- else {
- unsigned long args[] = { (unsigned long) addr, len, 0, 0, 0,
- 0 };
-
- ret = run_syscall_stub(mm_idp, __NR_munmap, args, 0,
- data, done);
- if(ret < 0)
- printk("munmap stub failed, errno = %d\n", ret);
- }
-
- return ret;
-}
-
-int protect(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
- int r, int w, int x, int done, void **data)
-{
- struct proc_mm_op protect;
- int prot, ret;
-
- prot = (r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) |
- (x ? PROT_EXEC : 0);
-
- if(proc_mm){
- int fd = mm_idp->u.mm_fd;
- protect = ((struct proc_mm_op) { .op = MM_MPROTECT,
- .u =
- { .mprotect =
- { .addr =
- (unsigned long) addr,
- .len = len,
- .prot = prot } } } );
-
- ret = os_write_file(fd, &protect, sizeof(protect));
- if(ret != sizeof(protect))
- printk("protect failed, err = %d", -ret);
- else ret = 0;
- }
- else {
- unsigned long args[] = { addr, len, prot, 0, 0, 0 };
-
- ret = run_syscall_stub(mm_idp, __NR_mprotect, args, 0,
- data, done);
- }
-
- return ret;
-}
-
-void before_mem_skas(unsigned long unused)
-{
-}
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index 677871f..c5c9885 100644
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -78,7 +78,7 @@ int init_new_context_skas(struct task_struct *task, struct mm_struct *mm)
struct mmu_context_skas *from_mm = NULL;
struct mmu_context_skas *to_mm = &mm->context.skas;
unsigned long stack = 0;
- int from_fd, ret = -ENOMEM;
+ int ret = -ENOMEM;
if(skas_needs_stub){
stack = get_zeroed_page(GFP_KERNEL);
@@ -108,11 +108,7 @@ int init_new_context_skas(struct task_struct *task, struct mm_struct *mm)
from_mm = &current->mm->context.skas;
if(proc_mm){
- if(from_mm)
- from_fd = from_mm->id.u.mm_fd;
- else from_fd = -1;
-
- ret = new_mm(from_fd, stack);
+ ret = new_mm(stack);
if(ret < 0){
printk("init_new_context_skas - new_mm failed, "
"errno = %d\n", ret);
diff --git a/arch/um/kernel/skas/process.c b/arch/um/kernel/skas/process.c
deleted file mode 100644
index 599d679..0000000
--- a/arch/um/kernel/skas/process.c
+++ /dev/null
@@ -1,581 +0,0 @@
-/*
- * Copyright (C) 2002- 2004 Jeff Dike (jdike@addtoit.com)
- * Licensed under the GPL
- */
-
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <errno.h>
-#include <signal.h>
-#include <setjmp.h>
-#include <sched.h>
-#include <sys/wait.h>
-#include <sys/mman.h>
-#include <sys/user.h>
-#include <sys/time.h>
-#include <asm/unistd.h>
-#include <asm/types.h>
-#include "user.h"
-#include "ptrace_user.h"
-#include "time_user.h"
-#include "sysdep/ptrace.h"
-#include "user_util.h"
-#include "kern_util.h"
-#include "skas.h"
-#include "stub-data.h"
-#include "mm_id.h"
-#include "sysdep/sigcontext.h"
-#include "sysdep/stub.h"
-#include "os.h"
-#include "proc_mm.h"
-#include "skas_ptrace.h"
-#include "chan_user.h"
-#include "signal_user.h"
-#include "registers.h"
-#include "mem.h"
-#include "uml-config.h"
-#include "process.h"
-
-int is_skas_winch(int pid, int fd, void *data)
-{
- if(pid != os_getpgrp())
- return(0);
-
- register_winch_irq(-1, fd, -1, data);
- return(1);
-}
-
-void wait_stub_done(int pid, int sig, char * fname)
-{
- int n, status, err;
-
- do {
- if ( sig != -1 ) {
- err = ptrace(PTRACE_CONT, pid, 0, sig);
- if(err)
- panic("%s : continue failed, errno = %d\n",
- fname, errno);
- }
- sig = 0;
-
- CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED));
- } while((n >= 0) && WIFSTOPPED(status) &&
- ((WSTOPSIG(status) == SIGVTALRM) ||
- /* running UML inside a detached screen can cause
- * SIGWINCHes
- */
- (WSTOPSIG(status) == SIGWINCH)));
-
- if((n < 0) || !WIFSTOPPED(status) ||
- (WSTOPSIG(status) != SIGUSR1 && WSTOPSIG(status) != SIGTRAP)){
- unsigned long regs[FRAME_SIZE];
- if(ptrace(PTRACE_GETREGS, pid, 0, regs) < 0)
- printk("Failed to get registers from stub, "
- "errno = %d\n", errno);
- else {
- int i;
-
- printk("Stub registers -\n");
- for(i = 0; i < FRAME_SIZE; i++)
- printk("\t%d - %lx\n", i, regs[i]);
- }
- panic("%s : failed to wait for SIGUSR1/SIGTRAP, "
- "pid = %d, n = %d, errno = %d, status = 0x%x\n",
- fname, pid, n, errno, status);
- }
-}
-
-void get_skas_faultinfo(int pid, struct faultinfo * fi)
-{
- int err;
-
- if(ptrace_faultinfo){
- err = ptrace(PTRACE_FAULTINFO, pid, 0, fi);
- if(err)
- panic("get_skas_faultinfo - PTRACE_FAULTINFO failed, "
- "errno = %d\n", errno);
-
- /* Special handling for i386, which has different structs */
- if (sizeof(struct ptrace_faultinfo) < sizeof(struct faultinfo))
- memset((char *)fi + sizeof(struct ptrace_faultinfo), 0,
- sizeof(struct faultinfo) -
- sizeof(struct ptrace_faultinfo));
- }
- else {
- wait_stub_done(pid, SIGSEGV, "get_skas_faultinfo");
-
- /* faultinfo is prepared by the stub-segv-handler at start of
- * the stub stack page. We just have to copy it.
- */
- memcpy(fi, (void *)current_stub_stack(), sizeof(*fi));
- }
-}
-
-static void handle_segv(int pid, union uml_pt_regs * regs)
-{
- get_skas_faultinfo(pid, &regs->skas.faultinfo);
- segv(regs->skas.faultinfo, 0, 1, NULL);
-}
-
-/*To use the same value of using_sysemu as the caller, ask it that value (in local_using_sysemu)*/
-static void handle_trap(int pid, union uml_pt_regs *regs, int local_using_sysemu)
-{
- int err, status;
-
- /* Mark this as a syscall */
- UPT_SYSCALL_NR(regs) = PT_SYSCALL_NR(regs->skas.regs);
-
- if (!local_using_sysemu)
- {
- err = ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET, __NR_getpid);
- if(err < 0)
- panic("handle_trap - nullifying syscall failed errno = %d\n",
- errno);
-
- err = ptrace(PTRACE_SYSCALL, pid, 0, 0);
- if(err < 0)
- panic("handle_trap - continuing to end of syscall failed, "
- "errno = %d\n", errno);
-
- CATCH_EINTR(err = waitpid(pid, &status, WUNTRACED));
- if((err < 0) || !WIFSTOPPED(status) ||
- (WSTOPSIG(status) != SIGTRAP + 0x80))
- panic("handle_trap - failed to wait at end of syscall, "
- "errno = %d, status = %d\n", errno, status);
- }
-
- handle_syscall(regs);
-}
-
-extern int __syscall_stub_start;
-int stub_code_fd = -1;
-__u64 stub_code_offset;
-
-static int userspace_tramp(void *stack)
-{
- void *addr;
-
- ptrace(PTRACE_TRACEME, 0, 0, 0);
-
- init_new_thread_signals(1);
- enable_timer();
-
- if(!proc_mm){
- /* This has a pte, but it can't be mapped in with the usual
- * tlb_flush mechanism because this is part of that mechanism
- */
- addr = mmap64((void *) UML_CONFIG_STUB_CODE, page_size(),
- PROT_EXEC, MAP_FIXED | MAP_PRIVATE,
- stub_code_fd, stub_code_offset);
- if(addr == MAP_FAILED){
- printk("mapping stub code failed, errno = %d\n",
- errno);
- exit(1);
- }
-
- if(stack != NULL){
- int fd;
- __u64 offset;
-
- fd = phys_mapping(to_phys(stack), &offset);
- addr = mmap((void *) UML_CONFIG_STUB_DATA, page_size(),
- PROT_READ | PROT_WRITE,
- MAP_FIXED | MAP_SHARED, fd, offset);
- if(addr == MAP_FAILED){
- printk("mapping stub stack failed, "
- "errno = %d\n", errno);
- exit(1);
- }
- }
- }
- if(!ptrace_faultinfo){
- unsigned long v = UML_CONFIG_STUB_CODE +
- (unsigned long) stub_segv_handler -
- (unsigned long) &__syscall_stub_start;
-
- set_sigstack((void *) UML_CONFIG_STUB_DATA, page_size());
- set_handler(SIGSEGV, (void *) v, SA_ONSTACK,
- SIGIO, SIGWINCH, SIGALRM, SIGVTALRM,
- SIGUSR1, -1);
- }
-
- os_stop_process(os_getpid());
- return(0);
-}
-
-/* Each element set once, and only accessed by a single processor anyway */
-#undef NR_CPUS
-#define NR_CPUS 1
-int userspace_pid[NR_CPUS];
-
-int start_userspace(unsigned long stub_stack)
-{
- void *stack;
- unsigned long sp;
- int pid, status, n, flags;
-
- if ( stub_code_fd == -1 )
- stub_code_fd = phys_mapping(to_phys(&__syscall_stub_start),
- &stub_code_offset);
-
- stack = mmap(NULL, PAGE_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC,
- MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
- if(stack == MAP_FAILED)
- panic("start_userspace : mmap failed, errno = %d", errno);
- sp = (unsigned long) stack + PAGE_SIZE - sizeof(void *);
-
- flags = CLONE_FILES | SIGCHLD;
- if(proc_mm) flags |= CLONE_VM;
- pid = clone(userspace_tramp, (void *) sp, flags, (void *) stub_stack);
- if(pid < 0)
- panic("start_userspace : clone failed, errno = %d", errno);
-
- do {
- CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED));
- if(n < 0)
- panic("start_userspace : wait failed, errno = %d",
- errno);
- } while(WIFSTOPPED(status) && (WSTOPSIG(status) == SIGVTALRM));
-
- if(!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGSTOP))
- panic("start_userspace : expected SIGSTOP, got status = %d",
- status);
-
- if (ptrace(PTRACE_OLDSETOPTIONS, pid, NULL, (void *)PTRACE_O_TRACESYSGOOD) < 0)
- panic("start_userspace : PTRACE_SETOPTIONS failed, errno=%d\n",
- errno);
-
- if(munmap(stack, PAGE_SIZE) < 0)
- panic("start_userspace : munmap failed, errno = %d\n", errno);
-
- return(pid);
-}
-
-void userspace(union uml_pt_regs *regs)
-{
- int err, status, op, pid = userspace_pid[0];
- int local_using_sysemu; /*To prevent races if using_sysemu changes under us.*/
-
- while(1){
- restore_registers(pid, regs);
-
- /* Now we set local_using_sysemu to be used for one loop */
- local_using_sysemu = get_using_sysemu();
-
- op = SELECT_PTRACE_OPERATION(local_using_sysemu, singlestepping(NULL));
-
- err = ptrace(op, pid, 0, 0);
- if(err)
- panic("userspace - could not resume userspace process, "
- "pid=%d, ptrace operation = %d, errno = %d\n",
- op, errno);
-
- CATCH_EINTR(err = waitpid(pid, &status, WUNTRACED));
- if(err < 0)
- panic("userspace - waitpid failed, errno = %d\n",
- errno);
-
- regs->skas.is_user = 1;
- save_registers(pid, regs);
- UPT_SYSCALL_NR(regs) = -1; /* Assume: It's not a syscall */
-
- if(WIFSTOPPED(status)){
- switch(WSTOPSIG(status)){
- case SIGSEGV:
- if(PTRACE_FULL_FAULTINFO || !ptrace_faultinfo)
- user_signal(SIGSEGV, regs, pid);
- else handle_segv(pid, regs);
- break;
- case SIGTRAP + 0x80:
- handle_trap(pid, regs, local_using_sysemu);
- break;
- case SIGTRAP:
- relay_signal(SIGTRAP, regs);
- break;
- case SIGIO:
- case SIGVTALRM:
- case SIGILL:
- case SIGBUS:
- case SIGFPE:
- case SIGWINCH:
- user_signal(WSTOPSIG(status), regs, pid);
- break;
- default:
- printk("userspace - child stopped with signal "
- "%d\n", WSTOPSIG(status));
- }
- pid = userspace_pid[0];
- interrupt_end();
-
- /* Avoid -ERESTARTSYS handling in host */
- PT_SYSCALL_NR(regs->skas.regs) = -1;
- }
- }
-}
-#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
-
-
-int copy_context_skas0(unsigned long new_stack, int pid)
-{
- int err;
- unsigned long regs[MAX_REG_NR];
- unsigned long current_stack = current_stub_stack();
- struct stub_data *data = (struct stub_data *) current_stack;
- struct stub_data *child_data = (struct stub_data *) new_stack;
- __u64 new_offset;
- int new_fd = phys_mapping(to_phys((void *)new_stack), &new_offset);
-
- /* prepare offset and fd of child's stack as argument for parent's
- * and child's mmap2 calls
- */
- *data = ((struct stub_data) { .offset = MMAP_OFFSET(new_offset),
- .fd = new_fd,
- .timer = ((struct itimerval)
- { { 0, 1000000 / hz() },
- { 0, 1000000 / hz() }})});
- get_safe_registers(regs);
-
- /* Set parent's instruction pointer to start of clone-stub */
- regs[REGS_IP_INDEX] = UML_CONFIG_STUB_CODE +
- (unsigned long) stub_clone_handler -
- (unsigned long) &__syscall_stub_start;
- regs[REGS_SP_INDEX] = UML_CONFIG_STUB_DATA + PAGE_SIZE -
- sizeof(void *);
- err = ptrace_setregs(pid, regs);
- if(err < 0)
- panic("copy_context_skas0 : PTRACE_SETREGS failed, "
- "pid = %d, errno = %d\n", pid, errno);
-
- /* set a well known return code for detection of child write failure */
- child_data->err = 12345678;
-
- /* Wait, until parent has finished its work: read child's pid from
- * parent's stack, and check, if bad result.
- */
- wait_stub_done(pid, 0, "copy_context_skas0");
-
- pid = data->err;
- if(pid < 0)
- panic("copy_context_skas0 - stub-parent reports error %d\n",
- pid);
-
- /* Wait, until child has finished too: read child's result from
- * child's stack and check it.
- */
- wait_stub_done(pid, -1, "copy_context_skas0");
- if (child_data->err != UML_CONFIG_STUB_DATA)
- panic("copy_context_skas0 - stub-child reports error %d\n",
- child_data->err);
-
- if (ptrace(PTRACE_OLDSETOPTIONS, pid, NULL,
- (void *)PTRACE_O_TRACESYSGOOD) < 0)
- panic("copy_context_skas0 : PTRACE_SETOPTIONS failed, "
- "errno = %d\n", errno);
-
- return pid;
-}
-
-/*
- * This is used only, if stub pages are needed, while proc_mm is
- * availabl. 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,
- unsigned long data, unsigned long stack)
-{
- struct proc_mm_op mmop;
- int n;
-
- mmop = ((struct proc_mm_op) { .op = MM_MMAP,
- .u =
- { .mmap =
- { .addr = code,
- .len = PAGE_SIZE,
- .prot = PROT_EXEC,
- .flags = MAP_FIXED | MAP_PRIVATE,
- .fd = stub_code_fd,
- .offset = stub_code_offset
- } } });
- n = os_write_file(fd, &mmop, sizeof(mmop));
- if(n != sizeof(mmop))
- panic("map_stub_pages : /proc/mm map for code failed, "
- "err = %d\n", -n);
-
- if ( stack ) {
- __u64 map_offset;
- int map_fd = phys_mapping(to_phys((void *)stack), &map_offset);
- mmop = ((struct proc_mm_op)
- { .op = MM_MMAP,
- .u =
- { .mmap =
- { .addr = data,
- .len = PAGE_SIZE,
- .prot = PROT_READ | PROT_WRITE,
- .flags = MAP_FIXED | MAP_SHARED,
- .fd = map_fd,
- .offset = map_offset
- } } });
- n = os_write_file(fd, &mmop, sizeof(mmop));
- if(n != sizeof(mmop))
- panic("map_stub_pages : /proc/mm map for data failed, "
- "err = %d\n", -n);
- }
-}
-
-void new_thread(void *stack, void **switch_buf_ptr, void **fork_buf_ptr,
- void (*handler)(int))
-{
- unsigned long flags;
- sigjmp_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(sigsetjmp(fork_buf, 1) == 0)
- new_thread_proc(stack, handler);
-
- remove_sigstack();
-
- set_signals(flags);
-}
-
-void thread_wait(void *sw, void *fb)
-{
- sigjmp_buf buf, **switch_buf = sw, *fork_buf;
-
- *switch_buf = &buf;
- fork_buf = fb;
- if(sigsetjmp(buf, 1) == 0)
- siglongjmp(*fork_buf, INIT_JMP_REMOVE_SIGSTACK);
-}
-
-void switch_threads(void *me, void *next)
-{
- sigjmp_buf my_buf, **me_ptr = me, *next_buf = next;
-
- *me_ptr = &my_buf;
- if(sigsetjmp(my_buf, 1) == 0)
- siglongjmp(*next_buf, 1);
-}
-
-static sigjmp_buf initial_jmpbuf;
-
-/* XXX Make these percpu */
-static void (*cb_proc)(void *arg);
-static void *cb_arg;
-static sigjmp_buf *cb_back;
-
-int start_idle_thread(void *stack, void *switch_buf_ptr, void **fork_buf_ptr)
-{
- sigjmp_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 = sigsetjmp(initial_jmpbuf, 1);
- switch(n){
- case INIT_JMP_NEW_THREAD:
- new_thread_proc((void *) stack, new_thread_handler);
- break;
- case INIT_JMP_REMOVE_SIGSTACK:
- remove_sigstack();
- break;
- case INIT_JMP_CALLBACK:
- (*cb_proc)(cb_arg);
- siglongjmp(*cb_back, 1);
- break;
- case INIT_JMP_HALT:
- kmalloc_ok = 0;
- return(0);
- case INIT_JMP_REBOOT:
- kmalloc_ok = 0;
- return(1);
- default:
- panic("Bad sigsetjmp return in start_idle_thread - %d\n", n);
- }
- siglongjmp(**switch_buf, 1);
-}
-
-void remove_sigstack(void)
-{
- stack_t stack = ((stack_t) { .ss_flags = SS_DISABLE,
- .ss_sp = NULL,
- .ss_size = 0 });
-
- if(sigaltstack(&stack, NULL) != 0)
- panic("disabling signal stack failed, errno = %d\n", errno);
-}
-
-void initial_thread_cb_skas(void (*proc)(void *), void *arg)
-{
- sigjmp_buf here;
-
- cb_proc = proc;
- cb_arg = arg;
- cb_back = &here;
-
- block_signals();
- if(sigsetjmp(here, 1) == 0)
- siglongjmp(initial_jmpbuf, INIT_JMP_CALLBACK);
- unblock_signals();
-
- cb_proc = NULL;
- cb_arg = NULL;
- cb_back = NULL;
-}
-
-void halt_skas(void)
-{
- block_signals();
- siglongjmp(initial_jmpbuf, INIT_JMP_HALT);
-}
-
-void reboot_skas(void)
-{
- block_signals();
- siglongjmp(initial_jmpbuf, INIT_JMP_REBOOT);
-}
-
-void switch_mm_skas(struct mm_id *mm_idp)
-{
- int err;
-
-#warning need cpu pid in switch_mm_skas
- if(proc_mm){
- err = ptrace(PTRACE_SWITCH_MM, userspace_pid[0], 0,
- mm_idp->u.mm_fd);
- if(err)
- panic("switch_mm_skas - PTRACE_SWITCH_MM failed, "
- "errno = %d\n", errno);
- }
- else userspace_pid[0] = mm_idp->u.pid;
-}
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/skas/process_kern.c b/arch/um/kernel/skas/process_kern.c
index 9c99025..3f70a2e 100644
--- a/arch/um/kernel/skas/process_kern.c
+++ b/arch/um/kernel/skas/process_kern.c
@@ -1,4 +1,4 @@
-/*
+/*
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
@@ -13,15 +13,12 @@
#include "asm/uaccess.h"
#include "asm/atomic.h"
#include "kern_util.h"
-#include "time_user.h"
-#include "signal_user.h"
#include "skas.h"
#include "os.h"
#include "user_util.h"
#include "tlb.h"
#include "kern.h"
#include "mode.h"
-#include "proc_mm.h"
#include "registers.h"
void switch_to_skas(void *prev, void *next)
@@ -35,7 +32,7 @@ void switch_to_skas(void *prev, void *next)
if(current->pid == 0)
switch_timers(0);
- switch_threads(&from->thread.mode.skas.switch_buf,
+ switch_threads(&from->thread.mode.skas.switch_buf,
to->thread.mode.skas.switch_buf);
if(current->pid == 0)
@@ -51,8 +48,8 @@ void new_thread_handler(int sig)
fn = current->thread.request.u.thread.proc;
arg = current->thread.request.u.thread.arg;
- change_sig(SIGUSR1, 1);
- thread_wait(&current->thread.mode.skas.switch_buf,
+ os_usr1_signal(1);
+ thread_wait(&current->thread.mode.skas.switch_buf,
current->thread.mode.skas.fork_buf);
if(current->thread.prev_sched != NULL)
@@ -83,8 +80,8 @@ void release_thread_skas(struct task_struct *task)
void fork_handler(int sig)
{
- change_sig(SIGUSR1, 1);
- thread_wait(&current->thread.mode.skas.switch_buf,
+ os_usr1_signal(1);
+ thread_wait(&current->thread.mode.skas.switch_buf,
current->thread.mode.skas.fork_buf);
force_flush_all();
@@ -94,13 +91,13 @@ void fork_handler(int sig)
schedule_tail(current->thread.prev_sched);
current->thread.prev_sched = NULL;
- /* Handle any immediate reschedules or signals */
+/* Handle any immediate reschedules or signals */
interrupt_end();
userspace(&current->thread.regs.regs);
}
int copy_thread_skas(int nr, unsigned long clone_flags, unsigned long sp,
- unsigned long stack_top, struct task_struct * p,
+ unsigned long stack_top, struct task_struct * p,
struct pt_regs *regs)
{
void (*handler)(int);
@@ -119,32 +116,19 @@ int copy_thread_skas(int nr, unsigned long clone_flags, unsigned long sp,
handler = new_thread_handler;
}
- new_thread(p->thread_info, &p->thread.mode.skas.switch_buf,
+ new_thread(task_stack_page(p), &p->thread.mode.skas.switch_buf,
&p->thread.mode.skas.fork_buf, handler);
return(0);
}
-extern void map_stub_pages(int fd, unsigned long code,
- unsigned long data, unsigned long stack);
-int new_mm(int from, unsigned long stack)
+int new_mm(unsigned long stack)
{
- struct proc_mm_op copy;
- int n, fd;
+ int fd;
fd = os_open_file("/proc/mm", of_cloexec(of_write(OPENFLAGS())), 0);
if(fd < 0)
return(fd);
- if(from != -1){
- copy = ((struct proc_mm_op) { .op = MM_COPY_SEGMENTS,
- .u =
- { .copy_segments = from } } );
- n = os_write_file(fd, &copy, sizeof(copy));
- if(n != sizeof(copy))
- printk("new_mm : /proc/mm copy_segments failed, "
- "err = %d\n", -n);
- }
-
if(skas_needs_stub)
map_stub_pages(fd, CONFIG_STUB_CODE, CONFIG_STUB_DATA, stack);
@@ -186,7 +170,7 @@ int start_uml_skas(void)
init_task.thread.request.u.thread.proc = start_kernel_proc;
init_task.thread.request.u.thread.arg = NULL;
- return(start_idle_thread(init_task.thread_info,
+ return(start_idle_thread(task_stack_page(&init_task),
&init_task.thread.mode.skas.switch_buf,
&init_task.thread.mode.skas.fork_buf));
}
diff --git a/arch/um/kernel/skas/trap_user.c b/arch/um/kernel/skas/trap_user.c
deleted file mode 100644
index 9950a67..0000000
--- a/arch/um/kernel/skas/trap_user.c
+++ /dev/null
@@ -1,78 +0,0 @@
-/*
- * Copyright (C) 2002 - 2003 Jeff Dike (jdike@addtoit.com)
- * Licensed under the GPL
- */
-
-#include <signal.h>
-#include <errno.h>
-#include "signal_user.h"
-#include "user_util.h"
-#include "kern_util.h"
-#include "task.h"
-#include "sigcontext.h"
-#include "skas.h"
-#include "ptrace_user.h"
-#include "sysdep/ptrace.h"
-#include "sysdep/ptrace_user.h"
-
-void sig_handler_common_skas(int sig, void *sc_ptr)
-{
- struct sigcontext *sc = sc_ptr;
- struct skas_regs *r;
- struct signal_info *info;
- int save_errno = errno;
- int save_user;
-
- /* This is done because to allow SIGSEGV to be delivered inside a SEGV
- * handler. This can happen in copy_user, and if SEGV is disabled,
- * the process will die.
- * XXX Figure out why this is better than SA_NODEFER
- */
- if(sig == SIGSEGV)
- change_sig(SIGSEGV, 1);
-
- r = &TASK_REGS(get_current())->skas;
- save_user = r->is_user;
- r->is_user = 0;
- if ( sig == SIGFPE || sig == SIGSEGV ||
- sig == SIGBUS || sig == SIGILL ||
- sig == SIGTRAP ) {
- GET_FAULTINFO_FROM_SC(r->faultinfo, sc);
- }
-
- change_sig(SIGUSR1, 1);
- info = &sig_info[sig];
- if(!info->is_irq) unblock_signals();
-
- (*info->handler)(sig, (union uml_pt_regs *) r);
-
- errno = save_errno;
- r->is_user = save_user;
-}
-
-extern int ptrace_faultinfo;
-
-void user_signal(int sig, union uml_pt_regs *regs, int pid)
-{
- struct signal_info *info;
- int segv = ((sig == SIGFPE) || (sig == SIGSEGV) || (sig == SIGBUS) ||
- (sig == SIGILL) || (sig == SIGTRAP));
-
- if (segv)
- get_skas_faultinfo(pid, &regs->skas.faultinfo);
- info = &sig_info[sig];
- (*info->handler)(sig, regs);
-
- unblock_signals();
-}
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/skas/uaccess.c b/arch/um/kernel/skas/uaccess.c
index a5a4752..5992c32 100644
--- a/arch/um/kernel/skas/uaccess.c
+++ b/arch/um/kernel/skas/uaccess.c
@@ -13,7 +13,7 @@
#include "asm/pgtable.h"
#include "asm/uaccess.h"
#include "kern_util.h"
-#include "user_util.h"
+#include "os.h"
extern void *um_virt_to_phys(struct task_struct *task, unsigned long addr,
pte_t *pte_out);
generated by cgit v1.1 at 2025-08-17 16:49:08 +0000