Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / arch / um / kernel / um_arch.c

diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 8736d09..7d51dd7 100644 (file)
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -1,4 +1,4 @@
-/* 
+/*
  * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com)
  * Licensed under the GPL
  */
@@ -38,6 +38,9 @@
 #include "choose-mode.h"
 #include "mode_kern.h"
 #include "mode.h"
+#ifdef UML_CONFIG_MODE_SKAS
+#include "skas.h"
+#endif
 
 #define DEFAULT_COMMAND_LINE "root=98:0"
 
@@ -123,7 +126,7 @@ unsigned long start_vm;
 unsigned long end_vm;
 int ncpus = 1;
 
-#ifdef CONFIG_MODE_TT
+#ifdef CONFIG_CMDLINE_ON_HOST
 /* Pointer set in linux_main, the array itself is private to each thread,
  * and changed at address space creation time so this poses no concurrency
  * problems.
@@ -134,17 +137,17 @@ static char *argv1_end = NULL;
 
 /* Set in early boot */
 static int have_root __initdata = 0;
-long physmem_size = 32 * 1024 * 1024;
+long long physmem_size = 32 * 1024 * 1024;
 
 void set_cmdline(char *cmd)
 {
-#ifdef CONFIG_MODE_TT
+#ifdef CONFIG_CMDLINE_ON_HOST
        char *umid, *ptr;
 
        if(CHOOSE_MODE(honeypot, 0)) return;
 
-       umid = get_umid(1);
-       if(umid != NULL){
+       umid = get_umid();
+       if(*umid != '\0'){
                snprintf(argv1_begin, 
                         (argv1_end - argv1_begin) * sizeof(*ptr), 
                         "(%s) ", umid);
@@ -190,6 +193,24 @@ __uml_setup("root=", uml_root_setup,
 "        root=/dev/ubd5\n\n"
 );
 
+#ifndef CONFIG_MODE_TT
+
+static int __init no_skas_debug_setup(char *line, int *add)
+{
+       printf("'debug' is not necessary to gdb UML in skas mode - run \n");
+       printf("'gdb linux' and disable CONFIG_CMDLINE_ON_HOST if gdb \n");
+       printf("doesn't work as expected\n");
+
+       return 0;
+}
+
+__uml_setup("debug", no_skas_debug_setup,
+"debug\n"
+"    this flag is not needed to run gdb on UML in skas mode\n\n"
+);
+
+#endif
+
 #ifdef CONFIG_SMP
 static int __init uml_ncpus_setup(char *line, int *add)
 {
@@ -240,10 +261,6 @@ static int __init mode_tt_setup(char *line, int *add)
        return(0);
 }
 
-#else
-
-#error Either CONFIG_MODE_TT or CONFIG_MODE_SKAS must be enabled
-
 #endif
 #endif
 #endif
@@ -318,6 +335,7 @@ int linux_main(int argc, char **argv)
        unsigned long avail, diff;
        unsigned long virtmem_size, max_physmem;
        unsigned int i, add;
+       char * mode;
 
        for (i = 1; i < argc; i++){
                if((i == 1) && (argv[i][0] == ' ')) continue;
@@ -329,6 +347,9 @@ int linux_main(int argc, char **argv)
        if(have_root == 0)
                add_arg(DEFAULT_COMMAND_LINE);
 
+       os_early_checks();
+       if (force_tt)
+               clear_can_do_skas();
        mode_tt = force_tt ? 1 : !can_do_skas();
 #ifndef CONFIG_MODE_TT
        if (mode_tt) {
@@ -338,13 +359,28 @@ int linux_main(int argc, char **argv)
                exit(1);
        }
 #endif
+
+#ifndef CONFIG_MODE_SKAS
+       mode = "TT";
+#else
+       /* Show to the user the result of selection */
+       if (mode_tt)
+               mode = "TT";
+       else if (proc_mm && ptrace_faultinfo)
+               mode = "SKAS3";
+       else
+               mode = "SKAS0";
+#endif
+
+       printf("UML running in %s mode\n", mode);
+
        uml_start = CHOOSE_MODE_PROC(set_task_sizes_tt, set_task_sizes_skas, 0,
                                     &host_task_size, &task_size);
 
-       /* Need to check this early because mmapping happens before the
-        * kernel is running.
-        */
-       check_tmpexec();
+       /*
+        * Setting up handlers to 'sig_info' struct
+        */
+       os_fill_handlinfo(handlinfo_kern);
 
        brk_start = (unsigned long) sbrk(0);
        CHOOSE_MODE_PROC(before_mem_tt, before_mem_skas, brk_start);
@@ -366,7 +402,7 @@ int linux_main(int argc, char **argv)
 
        setup_machinename(system_utsname.machine);
 
-#ifdef CONFIG_MODE_TT
+#ifdef CONFIG_CMDLINE_ON_HOST
        argv1_begin = argv[1];
        argv1_end = &argv[1][strlen(argv[1])];
 #endif
@@ -385,7 +421,7 @@ int linux_main(int argc, char **argv)
 #ifndef CONFIG_HIGHMEM
                highmem = 0;
                printf("CONFIG_HIGHMEM not enabled - physical memory shrunk "
-                      "to %ld bytes\n", physmem_size);
+                      "to %Lu bytes\n", physmem_size);
 #endif
        }
 
@@ -397,8 +433,8 @@ int linux_main(int argc, char **argv)
 
        setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem);
        if(init_maps(physmem_size, iomem_size, highmem)){
-               printf("Failed to allocate mem_map for %ld bytes of physical "
-                      "memory and %ld bytes of highmem\n", physmem_size,
+               printf("Failed to allocate mem_map for %Lu bytes of physical "
+                      "memory and %Lu bytes of highmem\n", physmem_size,
                       highmem);
                exit(1);
        }
@@ -409,7 +445,7 @@ int linux_main(int argc, char **argv)
        end_vm = start_vm + virtmem_size;
 
        if(virtmem_size < physmem_size)
-               printf("Kernel virtual memory size shrunk to %ld bytes\n",
+               printf("Kernel virtual memory size shrunk to %lu bytes\n",
                       virtmem_size);
 
        uml_postsetup();
@@ -441,7 +477,8 @@ static struct notifier_block panic_exit_notifier = {
 
 void __init setup_arch(char **cmdline_p)
 {
-       notifier_chain_register(&panic_notifier_list, &panic_exit_notifier);
+       atomic_notifier_chain_register(&panic_notifier_list,
+                       &panic_exit_notifier);
        paging_init();
         strlcpy(saved_command_line, command_line, COMMAND_LINE_SIZE);
        *cmdline_p = command_line;
@@ -451,11 +488,19 @@ void __init setup_arch(char **cmdline_p)
 void __init check_bugs(void)
 {
        arch_check_bugs();
-       check_ptrace();
-       check_sigio();
-       check_devanon();
+       os_check_bugs();
+}
+
+void apply_alternatives(struct alt_instr *start, struct alt_instr *end)
+{
+}
+
+void alternatives_smp_module_add(struct module *mod, char *name,
+                                void *locks, void *locks_end,
+                                void *text,  void *text_end)
+{
 }
 
-void apply_alternatives(void *start, void *end)
+void alternatives_smp_module_del(struct module *mod)
 {
 }