Added a bunch of C files under arch/um/kernel/skas and

arch/um/kernel/tt.

arch/um/kernel/skas/include/proc_mm.h

+/* 
+ * 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:
+ */

arch/um/kernel/tt/syscall_user.c

+/* 
+ * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include <unistd.h>
+#include <signal.h>
+#include <errno.h>
+#include <sys/ptrace.h>
+#include <asm/unistd.h>
+#include "sysdep/ptrace.h"
+#include "sigcontext.h"
+#include "ptrace_user.h"
+#include "task.h"
+#include "user_util.h"
+#include "kern_util.h"
+#include "syscall_user.h"
+#include "tt.h"
+
+/* XXX Bogus */
+#define ERESTARTSYS	512
+#define ERESTARTNOINTR	513
+#define ERESTARTNOHAND	514
+
+void syscall_handler_tt(int sig, struct uml_pt_regs *regs)
+{
+	void *sc;
+	long result;
+	int index, syscall;
+
+	syscall = regs->syscall;
+	sc = regs->mode.tt;
+	sc_to_regs(regs, sc, syscall);
+	SC_START_SYSCALL(sc);
+
+	index = record_syscall_start(syscall);
+	syscall_trace();
+	result = execute_syscall(regs);
+
+	/* regs->sc may have changed while the system call ran (there may
+	 * have been an interrupt or segfault), so it needs to be refreshed.
+	 */
+	regs->mode.tt = sc;
+
+	SC_SET_SYSCALL_RETURN(sc, result);
+	if((result == -ERESTARTNOHAND) || (result == -ERESTARTSYS) || 
+	   (result == -ERESTARTNOINTR))
+		do_signal(result);
+
+	syscall_trace();
+	record_syscall_end(index, result);
+}
+
+int do_syscall(void *task, int pid)
+{
+	unsigned long proc_regs[FRAME_SIZE];
+	struct uml_pt_regs *regs;
+	int syscall;
+
+	if(ptrace_getregs(pid, proc_regs) < 0)
+		tracer_panic("Couldn't read registers");
+	syscall = PT_SYSCALL_NR(proc_regs);
+
+	regs = TASK_REGS(task);
+	UPT_SYSCALL_NR(regs) = syscall;
+
+	if(syscall < 1) return(0);
+
+	if((syscall != __NR_sigreturn) &&
+	   ((unsigned long *) PT_IP(proc_regs) >= &_stext) && 
+	   ((unsigned long *) PT_IP(proc_regs) <= &_etext))
+		tracer_panic("I'm tracing myself and I can't get out");
+
+	if(ptrace(PTRACE_POKEUSER, pid, PT_SYSCALL_NR_OFFSET, 
+		  __NR_getpid) < 0)
+		tracer_panic("do_syscall : Nullifying syscall failed, "
+			     "errno = %d", errno);
+	return(1);
+}
+
+/*
+ * 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:
+ */