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authorJeff Dike <jdike@addtoit.com>2007-10-16 01:26:50 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 09:43:05 -0700
commit42fda66387daa53538ae13a2c858396aaf037158 (patch)
tree77955a91a958fde7be47cb0ff23ac9e1248217db /arch/um/kernel/tt/gdb.c
parenta1ff5878d2628bbe1e42821c024c96f48318f683 (diff)
uml: throw out CONFIG_MODE_TT
This patchset throws out tt mode, which has been non-functional for a while. This is done in phases, interspersed with code cleanups on the affected files. The removal is done as follows: remove all code, config options, and files which depend on CONFIG_MODE_TT get rid of the CHOOSE_MODE macro, which decided whether to call tt-mode or skas-mode code, and replace invocations with their skas portions replace all now-trivial procedures with their skas equivalents There are now a bunch of now-redundant pieces of data structures, including mode-specific pieces of the thread structure, pt_regs, and mm_context. These are all replaced with their skas-specific contents. As part of the ongoing style compliance project, I made a style pass over all files that were changed. There are three such patches, one for each phase, covering the files affected by that phase but no later ones. I noticed that we weren't freeing the LDT state associated with a process when it exited, so that's fixed in one of the later patches. The last patch is a tidying patch which I've had for a while, but which caused inexplicable crashes under tt mode. Since that is no longer a problem, this can now go in. This patch: Start getting rid of tt mode support. This patch throws out CONFIG_MODE_TT and all config options, code, and files which depend on it. CONFIG_MODE_SKAS is gone and everything that depends on it is included unconditionally. The few changed lines are in re-written Kconfig help, lines which needed something skas-related removed from them, and a few more which weren't strictly deletions. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um/kernel/tt/gdb.c')
-rw-r--r--arch/um/kernel/tt/gdb.c280
1 files changed, 0 insertions, 280 deletions
diff --git a/arch/um/kernel/tt/gdb.c b/arch/um/kernel/tt/gdb.c
deleted file mode 100644
index 030e4658f36..00000000000
--- a/arch/um/kernel/tt/gdb.c
+++ /dev/null
@@ -1,280 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <string.h>
-#include <signal.h>
-#include <sys/types.h>
-#include "ptrace_user.h"
-#include "uml-config.h"
-#include "kern_constants.h"
-#include "chan_user.h"
-#include "init.h"
-#include "user.h"
-#include "debug.h"
-#include "kern_util.h"
-#include "tt.h"
-#include "sysdep/thread.h"
-#include "os.h"
-
-extern int debugger_pid;
-extern int debugger_fd;
-extern int debugger_parent;
-
-int detach(int pid, int sig)
-{
- return(ptrace(PTRACE_DETACH, pid, 0, sig));
-}
-
-int attach(int pid)
-{
- int err;
-
- err = ptrace(PTRACE_ATTACH, pid, 0, 0);
- if(err < 0) return(-errno);
- else return(err);
-}
-
-int cont(int pid)
-{
- return(ptrace(PTRACE_CONT, pid, 0, 0));
-}
-
-#ifdef UML_CONFIG_PT_PROXY
-
-int debugger_signal(int status, pid_t pid)
-{
- return(debugger_proxy(status, pid));
-}
-
-void child_signal(pid_t pid, int status)
-{
- child_proxy(pid, status);
-}
-
-static void gdb_announce(char *dev_name, int dev)
-{
- printf("gdb assigned device '%s'\n", dev_name);
-}
-
-static struct chan_opts opts = {
- .announce = gdb_announce,
- .xterm_title = "UML kernel debugger",
- .raw = 0,
- .tramp_stack = 0,
- .in_kernel = 0,
-};
-
-/* Accessed by the tracing thread, which automatically serializes access */
-static void *xterm_data;
-static int xterm_fd;
-
-extern void *xterm_init(char *, int, struct chan_opts *);
-extern int xterm_open(int, int, int, void *, char **);
-extern void xterm_close(int, void *);
-
-int open_gdb_chan(void)
-{
- char stack[UM_KERN_PAGE_SIZE], *dummy;
-
- opts.tramp_stack = (unsigned long) stack;
- xterm_data = xterm_init("", 0, &opts);
- xterm_fd = xterm_open(1, 1, 1, xterm_data, &dummy);
- return(xterm_fd);
-}
-
-static void exit_debugger_cb(void *unused)
-{
- if(debugger_pid != -1){
- if(gdb_pid != -1){
- fake_child_exit();
- gdb_pid = -1;
- }
- else kill_child_dead(debugger_pid);
- debugger_pid = -1;
- if(debugger_parent != -1)
- detach(debugger_parent, SIGINT);
- }
- if(xterm_data != NULL) xterm_close(xterm_fd, xterm_data);
-}
-
-static void exit_debugger(void)
-{
- initial_thread_cb(exit_debugger_cb, NULL);
-}
-
-__uml_exitcall(exit_debugger);
-
-struct gdb_data {
- char *str;
- int err;
-};
-
-extern char *linux_prog;
-
-static void config_gdb_cb(void *arg)
-{
- struct gdb_data *data = arg;
- void *task;
- int pid;
-
- data->err = -1;
- if(debugger_pid != -1) exit_debugger_cb(NULL);
- if(!strncmp(data->str, "pid,", strlen("pid,"))){
- data->str += strlen("pid,");
- pid = strtoul(data->str, NULL, 0);
- task = cpu_tasks[0].task;
- debugger_pid = attach_debugger(TASK_EXTERN_PID(task), pid, 0);
- if(debugger_pid != -1){
- data->err = 0;
- gdb_pid = pid;
- }
- return;
- }
- data->err = 0;
- debugger_pid = start_debugger(linux_prog, 0, 0, &debugger_fd);
- init_proxy(debugger_pid, 0, 0);
-}
-
-int gdb_config(char *str, char **error_out)
-{
- struct gdb_data data;
-
- if(*str++ != '=') return(-1);
- data.str = str;
- initial_thread_cb(config_gdb_cb, &data);
- return(data.err);
-}
-
-void remove_gdb_cb(void *unused)
-{
- exit_debugger_cb(NULL);
-}
-
-int gdb_remove(int unused, char **error_out)
-{
- initial_thread_cb(remove_gdb_cb, NULL);
- return 0;
-}
-
-void signal_usr1(int sig)
-{
- if(debugger_pid != -1){
- printf("The debugger is already running\n");
- return;
- }
- debugger_pid = start_debugger(linux_prog, 0, 0, &debugger_fd);
- init_proxy(debugger_pid, 0, 0);
-}
-
-int init_ptrace_proxy(int idle_pid, int startup, int stop)
-{
- int pid, status;
-
- pid = start_debugger(linux_prog, startup, stop, &debugger_fd);
- status = wait_for_stop(idle_pid, SIGSTOP, PTRACE_CONT, NULL);
- if(pid < 0){
- cont(idle_pid);
- return(-1);
- }
- init_proxy(pid, 1, status);
- return(pid);
-}
-
-int attach_debugger(int idle_pid, int pid, int stop)
-{
- int status = 0, err;
-
- err = attach(pid);
- if(err < 0){
- printf("Failed to attach pid %d, errno = %d\n", pid, -err);
- return(-1);
- }
- if(stop) status = wait_for_stop(idle_pid, SIGSTOP, PTRACE_CONT, NULL);
- init_proxy(pid, 1, status);
- return(pid);
-}
-
-#ifdef notdef /* Put this back in when it does something useful */
-static int __init uml_gdb_init_setup(char *line, int *add)
-{
- gdb_init = uml_strdup(line);
- return 0;
-}
-
-__uml_setup("gdb=", uml_gdb_init_setup,
-"gdb=<channel description>\n\n"
-);
-#endif
-
-static int __init uml_gdb_pid_setup(char *line, int *add)
-{
- gdb_pid = strtoul(line, NULL, 0);
- *add = 0;
- return 0;
-}
-
-__uml_setup("gdb-pid=", uml_gdb_pid_setup,
-"gdb-pid=<pid>\n"
-" gdb-pid is used to attach an external debugger to UML. This may be\n"
-" an already-running gdb or a debugger-like process like strace.\n\n"
-);
-
-#else
-
-int debugger_signal(int status, pid_t pid){ return(0); }
-void child_signal(pid_t pid, int status){ }
-int init_ptrace_proxy(int idle_pid, int startup, int stop)
-{
- printf("debug requested when CONFIG_PT_PROXY is off\n");
- kill_child_dead(idle_pid);
- exit(1);
-}
-
-void signal_usr1(int sig)
-{
- printf("debug requested when CONFIG_PT_PROXY is off\n");
-}
-
-int attach_debugger(int idle_pid, int pid, int stop)
-{
- printf("attach_debugger called when CONFIG_PT_PROXY "
- "is off\n");
- return(-1);
-}
-
-int config_gdb(char *str)
-{
- return(-1);
-}
-
-int remove_gdb(void)
-{
- return(-1);
-}
-
-int init_parent_proxy(int pid)
-{
- return(-1);
-}
-
-void debugger_parent_signal(int status, int pid)
-{
-}
-
-#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:
- */