Merge branch 'master' into upstream

11 files changed, 65 insertions, 24 deletions

diff --git a/arch/um/include/chan_kern.h b/arch/um/include/chan_kern.h
index 1bb5e9d9427..572d286ed2c 100644
--- a/arch/um/include/chan_kern.h
+++ b/arch/um/include/chan_kern.h
@@ -23,21 +23,21 @@ struct chan {
 	unsigned int opened:1;
 	unsigned int enabled:1;
 	int fd;
-	struct chan_ops *ops;
+	const struct chan_ops *ops;
 	void *data;
 };
 
 extern void chan_interrupt(struct list_head *chans, struct work_struct *task,
 			   struct tty_struct *tty, int irq);
 extern int parse_chan_pair(char *str, struct line *line, int device,
-			   struct chan_opts *opts);
+			   const struct chan_opts *opts);
 extern int open_chan(struct list_head *chans);
 extern int write_chan(struct list_head *chans, const char *buf, int len,
 			     int write_irq);
 extern int console_write_chan(struct list_head *chans, const char *buf, 
 			      int len);
 extern int console_open_chan(struct line *line, struct console *co,
-			     struct chan_opts *opts);
+			     const struct chan_opts *opts);
 extern void deactivate_chan(struct list_head *chans, int irq);
 extern void reactivate_chan(struct list_head *chans, int irq);
 extern void chan_enable_winch(struct list_head *chans, struct tty_struct *tty);
diff --git a/arch/um/include/chan_user.h b/arch/um/include/chan_user.h
index 659bb3cac32..a795547a1db 100644
--- a/arch/um/include/chan_user.h
+++ b/arch/um/include/chan_user.h
@@ -20,7 +20,7 @@ enum chan_init_pri { INIT_STATIC, INIT_ALL, INIT_ONE };
 
 struct chan_ops {
 	char *type;
-	void *(*init)(char *, int, struct chan_opts *);
+	void *(*init)(char *, int, const struct chan_opts *);
 	int (*open)(int, int, int, void *, char **);
 	void (*close)(int, void *);
 	int (*read)(int, char *, void *);
@@ -31,8 +31,8 @@ struct chan_ops {
 	int winch;
 };
 
-extern struct chan_ops fd_ops, null_ops, port_ops, pts_ops, pty_ops, tty_ops,
-	xterm_ops;
+extern const struct chan_ops fd_ops, null_ops, port_ops, pts_ops, pty_ops,
+	tty_ops, xterm_ops;
 
 extern void generic_close(int fd, void *unused);
 extern int generic_read(int fd, char *c_out, void *unused);
diff --git a/arch/um/include/kern_util.h b/arch/um/include/kern_util.h
index 89e1dc835a5..59cfa9e0cad 100644
--- a/arch/um/include/kern_util.h
+++ b/arch/um/include/kern_util.h
@@ -21,7 +21,7 @@ struct kern_handlers {
 	kern_hndl timer_handler;
 };
 
-extern struct kern_handlers handlinfo_kern;
+extern const struct kern_handlers handlinfo_kern;
 
 extern int ncpus;
 extern char *linux_prog;
diff --git a/arch/um/include/line.h b/arch/um/include/line.h
index 27bf2f6fbc0..642c9a0320f 100644
--- a/arch/um/include/line.h
+++ b/arch/um/include/line.h
@@ -52,7 +52,7 @@ struct line {
 
 	int sigio;
 	struct work_struct task;
-	struct line_driver *driver;
+	const struct line_driver *driver;
 	int have_irq;
 };
 
@@ -99,7 +99,7 @@ extern void lines_init(struct line *lines, int nlines, struct chan_opts *opts);
 extern void close_lines(struct line *lines, int nlines);
 
 extern int line_config(struct line *lines, unsigned int sizeof_lines,
-		       char *str, struct chan_opts *opts);
+		       char *str, const struct chan_opts *opts);
 extern int line_id(char **str, int *start_out, int *end_out);
 extern int line_remove(struct line *lines, unsigned int sizeof_lines, int n);
 extern int line_get_config(char *dev, struct line *lines,
diff --git a/arch/um/include/net_kern.h b/arch/um/include/net_kern.h
index f7de6df60dd..769fba43ee0 100644
--- a/arch/um/include/net_kern.h
+++ b/arch/um/include/net_kern.h
@@ -54,8 +54,8 @@ struct transport {
 	struct list_head list;
 	char *name;
 	int (*setup)(char *, char **, void *);
-	struct net_user_info *user;
-	struct net_kern_info *kern;
+	const struct net_user_info *user;
+	const struct net_kern_info *kern;
 	int private_size;
 	int setup_size;
 };
diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index 24fb6d8680e..120ca21a513 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -14,6 +14,7 @@
 #include "skas/mm_id.h"
 #include "irq_user.h"
 #include "sysdep/tls.h"
+#include "sysdep/archsetjmp.h"
 
 #define OS_TYPE_FILE 1
 #define OS_TYPE_DIR 2
@@ -198,7 +199,9 @@ extern long os_ptrace_ldt(long pid, long addr, long data);
 extern int os_getpid(void);
 extern int os_getpgrp(void);
 
+#ifdef UML_CONFIG_MODE_TT
 extern void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int));
+#endif
 extern void init_new_thread_signals(void);
 extern int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr);
 
@@ -216,7 +219,6 @@ extern void os_flush_stdout(void);
  */
 extern void forward_ipi(int fd, int pid);
 extern void kill_child_dead(int pid);
-extern void stop(void);
 extern int wait_for_stop(int pid, int sig, int cont_type, void *relay);
 extern int protect_memory(unsigned long addr, unsigned long len,
 			  int r, int w, int x, int must_succeed);
@@ -307,12 +309,9 @@ extern int copy_context_skas0(unsigned long stack, int pid);
 extern void userspace(union uml_pt_regs *regs);
 extern void map_stub_pages(int fd, unsigned long code,
 			   unsigned long data, unsigned long stack);
-extern void new_thread(void *stack, void **switch_buf_ptr,
-			 void **fork_buf_ptr, void (*handler)(int));
-extern void thread_wait(void *sw, void *fb);
-extern void switch_threads(void *me, void *next);
-extern int start_idle_thread(void *stack, void *switch_buf_ptr,
-			     void **fork_buf_ptr);
+extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
+extern void switch_threads(jmp_buf *me, jmp_buf *you);
+extern int start_idle_thread(void *stack, jmp_buf *switch_buf);
 extern void initial_thread_cb_skas(void (*proc)(void *),
 				 void *arg);
 extern void halt_skas(void);
diff --git a/arch/um/include/skas/skas.h b/arch/um/include/skas/skas.h
index 853b26f148c..e88926b1607 100644
--- a/arch/um/include/skas/skas.h
+++ b/arch/um/include/skas/skas.h
@@ -14,8 +14,7 @@ extern int proc_mm, ptrace_faultinfo, ptrace_ldt;
 extern int skas_needs_stub;
 
 extern int user_thread(unsigned long stack, int flags);
-extern void new_thread_proc(void *stack, void (*handler)(int sig));
-extern void new_thread_handler(int sig);
+extern void new_thread_handler(void);
 extern void handle_syscall(union uml_pt_regs *regs);
 extern int new_mm(unsigned long stack);
 extern void get_skas_faultinfo(int pid, struct faultinfo * fi);
diff --git a/arch/um/include/sysdep-i386/archsetjmp.h b/arch/um/include/sysdep-i386/archsetjmp.h
index ea1ba3d42ae..11bafab669e 100644
--- a/arch/um/include/sysdep-i386/archsetjmp.h
+++ b/arch/um/include/sysdep-i386/archsetjmp.h
@@ -16,4 +16,7 @@ struct __jmp_buf {
 
 typedef struct __jmp_buf jmp_buf[1];
 
+#define JB_IP __eip
+#define JB_SP __esp
+
 #endif				/* _SETJMP_H */
diff --git a/arch/um/include/sysdep-x86_64/archsetjmp.h b/arch/um/include/sysdep-x86_64/archsetjmp.h
index 454fc60aff6..9a5e1a6ec80 100644
--- a/arch/um/include/sysdep-x86_64/archsetjmp.h
+++ b/arch/um/include/sysdep-x86_64/archsetjmp.h
@@ -18,4 +18,7 @@ struct __jmp_buf {
 
 typedef struct __jmp_buf jmp_buf[1];
 
+#define JB_IP __rip
+#define JB_SP __rsp
+
 #endif				/* _SETJMP_H */
diff --git a/arch/um/include/sysdep-x86_64/ptrace.h b/arch/um/include/sysdep-x86_64/ptrace.h
index 8d353f0feec..617bb9efc93 100644
--- a/arch/um/include/sysdep-x86_64/ptrace.h
+++ b/arch/um/include/sysdep-x86_64/ptrace.h
@@ -50,6 +50,21 @@
 #define HOST_FS 25
 #define HOST_GS 26
 
+/* Also defined in asm/ptrace-x86_64.h, but not in libc headers.  So, these
+ * are already defined for kernel code, but not for userspace code.
+ */
+#ifndef FS_BASE
+/* These aren't defined in ptrace.h, but exist in struct user_regs_struct,
+ * which is what x86_64 ptrace actually uses.
+ */
+#define FS_BASE (HOST_FS_BASE * sizeof(long))
+#define GS_BASE (HOST_GS_BASE * sizeof(long))
+#define DS (HOST_DS * sizeof(long))
+#define ES (HOST_ES * sizeof(long))
+#define FS (HOST_FS * sizeof(long))
+#define GS (HOST_GS * sizeof(long))
+#endif
+
 #define REGS_FS_BASE(r) ((r)[HOST_FS_BASE])
 #define REGS_GS_BASE(r) ((r)[HOST_GS_BASE])
 #define REGS_DS(r) ((r)[HOST_DS])
@@ -89,9 +104,12 @@ union uml_pt_regs {
 #endif
 #ifdef UML_CONFIG_MODE_SKAS
 	struct skas_regs {
-		/* XXX */
-		unsigned long regs[27];
-		unsigned long fp[65];
+		/* x86_64 ptrace uses sizeof(user_regs_struct) as its register
+		 * file size, while i386 uses FRAME_SIZE.  Therefore, we need
+		 * to use UM_FRAME_SIZE here instead of HOST_FRAME_SIZE.
+		 */
+		unsigned long regs[UM_FRAME_SIZE];
+		unsigned long fp[HOST_FP_SIZE];
                 struct faultinfo faultinfo;
 		long syscall;
 		int is_user;
@@ -120,11 +138,16 @@ extern int mode_tt;
 #define UPT_R14(r) __CHOOSE_MODE(SC_R14(UPT_SC(r)), REGS_R14((r)->skas.regs))
 #define UPT_R15(r) __CHOOSE_MODE(SC_R15(UPT_SC(r)), REGS_R15((r)->skas.regs))
 #define UPT_CS(r) __CHOOSE_MODE(SC_CS(UPT_SC(r)), REGS_CS((r)->skas.regs))
+#define UPT_FS_BASE(r) \
+	__CHOOSE_MODE(SC_FS_BASE(UPT_SC(r)), REGS_FS_BASE((r)->skas.regs))
 #define UPT_FS(r) __CHOOSE_MODE(SC_FS(UPT_SC(r)), REGS_FS((r)->skas.regs))
+#define UPT_GS_BASE(r) \
+	__CHOOSE_MODE(SC_GS_BASE(UPT_SC(r)), REGS_GS_BASE((r)->skas.regs))
 #define UPT_GS(r) __CHOOSE_MODE(SC_GS(UPT_SC(r)), REGS_GS((r)->skas.regs))
 #define UPT_DS(r) __CHOOSE_MODE(SC_DS(UPT_SC(r)), REGS_DS((r)->skas.regs))
 #define UPT_ES(r) __CHOOSE_MODE(SC_ES(UPT_SC(r)), REGS_ES((r)->skas.regs))
 #define UPT_CS(r) __CHOOSE_MODE(SC_CS(UPT_SC(r)), REGS_CS((r)->skas.regs))
+#define UPT_SS(r) __CHOOSE_MODE(SC_SS(UPT_SC(r)), REGS_SS((r)->skas.regs))
 #define UPT_ORIG_RAX(r) \
 	__CHOOSE_MODE((r)->tt.orig_rax, REGS_ORIG_RAX((r)->skas.regs))
 
@@ -183,6 +206,13 @@ struct syscall_args {
                 case RBP: val = UPT_RBP(regs); break; \
                 case ORIG_RAX: val = UPT_ORIG_RAX(regs); break; \
                 case CS: val = UPT_CS(regs); break; \
+                case SS: val = UPT_SS(regs); break; \
+		case FS_BASE: val = UPT_FS_BASE(regs); break; \
+                case GS_BASE: val = UPT_GS_BASE(regs); break; \
+                case DS: val = UPT_DS(regs); break; \
+                case ES: val = UPT_ES(regs); break; \
+                case FS : val = UPT_FS (regs); break; \
+		case GS: val = UPT_GS(regs); break;	    \
                 case EFLAGS: val = UPT_EFLAGS(regs); break; \
                 default :  \
                         panic("Bad register in UPT_REG : %d\n", reg);  \
@@ -214,6 +244,13 @@ struct syscall_args {
                 case RBP: UPT_RBP(regs) = __upt_val; break; \
                 case ORIG_RAX: UPT_ORIG_RAX(regs) = __upt_val; break; \
                 case CS: UPT_CS(regs) = __upt_val; break; \
+                case SS: UPT_SS(regs) = __upt_val; break; \
+                case FS_BASE: UPT_FS_BASE(regs) = __upt_val; break; \
+                case GS_BASE: UPT_GS_BASE(regs) = __upt_val; break; \
+                case DS: UPT_DS(regs) = __upt_val; break; \
+                case ES: UPT_ES(regs) = __upt_val; break; \
+                case FS: UPT_FS(regs) = __upt_val; break; \
+                case GS: UPT_GS(regs) = __upt_val; break; \
                 case EFLAGS: UPT_EFLAGS(regs) = __upt_val; break; \
                 default :  \
                         panic("Bad register in UPT_SET : %d\n", reg);  \
diff --git a/arch/um/include/sysdep-x86_64/sc.h b/arch/um/include/sysdep-x86_64/sc.h
index a160d9fcc59..8aee45b0743 100644
--- a/arch/um/include/sysdep-x86_64/sc.h
+++ b/arch/um/include/sysdep-x86_64/sc.h
@@ -35,11 +35,11 @@
 #define SC_GS(sc) SC_OFFSET(sc, SC_GS)
 #define SC_EFLAGS(sc) SC_OFFSET(sc, SC_EFLAGS)
 #define SC_SIGMASK(sc) SC_OFFSET(sc, SC_SIGMASK)
+#define SC_SS(sc) SC_OFFSET(sc, SC_SS)
 #if 0
 #define SC_ORIG_RAX(sc) SC_OFFSET(sc, SC_ORIG_RAX)
 #define SC_DS(sc) SC_OFFSET(sc, SC_DS)
 #define SC_ES(sc) SC_OFFSET(sc, SC_ES)
-#define SC_SS(sc) SC_OFFSET(sc, SC_SS)
 #endif
 
 #endif