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>
diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
index c5cf4a0..6651937 100644
--- a/arch/um/kernel/Makefile
+++ b/arch/um/kernel/Makefile
@@ -9,15 +9,12 @@
obj-y = config.o exec.o exitcode.o init_task.o irq.o ksyms.o mem.o \
physmem.o process.o ptrace.o reboot.o sigio.o \
signal.o smp.o syscall.o sysrq.o time.o tlb.o trap.o uaccess.o \
- um_arch.o umid.o
+ um_arch.o umid.o skas/
obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o
obj-$(CONFIG_GPROF) += gprof_syms.o
obj-$(CONFIG_GCOV) += gmon_syms.o
-obj-$(CONFIG_MODE_TT) += tt/
-obj-$(CONFIG_MODE_SKAS) += skas/
-
USER_OBJS := config.o
include arch/um/scripts/Makefile.rules
diff --git a/arch/um/kernel/dyn.lds.S b/arch/um/kernel/dyn.lds.S
index 4185090..3866f49 100644
--- a/arch/um/kernel/dyn.lds.S
+++ b/arch/um/kernel/dyn.lds.S
@@ -10,8 +10,6 @@
PROVIDE (__executable_start = START);
. = START + SIZEOF_HEADERS;
.interp : { *(.interp) }
- /* Used in arch/um/kernel/mem.c. Any memory between START and __binary_start
- * is remapped.*/
__binary_start = .;
. = ALIGN(4096); /* Init code and data */
_text = .;
diff --git a/arch/um/kernel/exec.c b/arch/um/kernel/exec.c
index ce6828f..84d77a0 100644
--- a/arch/um/kernel/exec.c
+++ b/arch/um/kernel/exec.c
@@ -57,7 +57,6 @@
SUBARCH_EXECVE1(¤t->thread.regs.regs);
#endif
task_unlock(current);
- set_cmdline(current_cmd());
}
return(error);
}
diff --git a/arch/um/kernel/init_task.c b/arch/um/kernel/init_task.c
index fa90db9..3305508 100644
--- a/arch/um/kernel/init_task.c
+++ b/arch/um/kernel/init_task.c
@@ -46,10 +46,3 @@
union thread_union cpu0_irqstack
__attribute__((__section__(".data.init_irqstack"))) =
{ INIT_THREAD_INFO(init_task) };
-
-#ifdef CONFIG_MODE_TT
-void unprotect_stack(unsigned long stack)
-{
- os_protect_memory((void *) stack, THREAD_SIZE, 1, 1, 0);
-}
-#endif
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index cf0dd9c..ec1ed68 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -339,30 +339,6 @@
return 0;
}
-#ifdef CONFIG_MODE_TT
-void forward_interrupts(int pid)
-{
- struct irq_fd *irq;
- unsigned long flags;
- int err;
-
- spin_lock_irqsave(&irq_lock, flags);
- for (irq = active_fds; irq != NULL; irq = irq->next) {
- err = os_set_owner(irq->fd, pid);
- if (err < 0) {
- /* XXX Just remove the irq rather than
- * print out an infinite stream of these
- */
- printk("Failed to forward %d to pid %d, err = %d\n",
- irq->fd, pid, -err);
- }
-
- irq->pid = pid;
- }
- spin_unlock_irqrestore(&irq_lock, flags);
-}
-#endif
-
/*
* do_IRQ handles all normal device IRQ's (the special
* SMP cross-CPU interrupts have their own specific
diff --git a/arch/um/kernel/ksyms.c b/arch/um/kernel/ksyms.c
index 7b3e53f..59e22d2 100644
--- a/arch/um/kernel/ksyms.c
+++ b/arch/um/kernel/ksyms.c
@@ -34,24 +34,14 @@
EXPORT_SYMBOL(high_physmem);
EXPORT_SYMBOL(empty_zero_page);
EXPORT_SYMBOL(um_virt_to_phys);
-EXPORT_SYMBOL(mode_tt);
EXPORT_SYMBOL(handle_page_fault);
EXPORT_SYMBOL(find_iomem);
-#ifdef CONFIG_MODE_TT
-EXPORT_SYMBOL(stop);
-EXPORT_SYMBOL(strncpy_from_user_tt);
-EXPORT_SYMBOL(copy_from_user_tt);
-EXPORT_SYMBOL(copy_to_user_tt);
-#endif
-
-#ifdef CONFIG_MODE_SKAS
EXPORT_SYMBOL(strnlen_user_skas);
EXPORT_SYMBOL(strncpy_from_user_skas);
EXPORT_SYMBOL(copy_to_user_skas);
EXPORT_SYMBOL(copy_from_user_skas);
EXPORT_SYMBOL(clear_user_skas);
-#endif
EXPORT_SYMBOL(uml_strdup);
EXPORT_SYMBOL(os_stat_fd);
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index f083787..005ed44 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -183,13 +183,6 @@
kmalloc_ok = save_kmalloc_ok;
}
-#ifdef CONFIG_MODE_TT
-unsigned long stack_sp(unsigned long page)
-{
- return page + PAGE_SIZE - sizeof(void *);
-}
-#endif
-
void default_idle(void)
{
CHOOSE_MODE(uml_idle_timer(), (void) 0);
diff --git a/arch/um/kernel/reboot.c b/arch/um/kernel/reboot.c
index 7e4305a..93df067 100644
--- a/arch/um/kernel/reboot.c
+++ b/arch/um/kernel/reboot.c
@@ -14,28 +14,9 @@
void (*pm_power_off)(void);
-#ifdef CONFIG_SMP
-static void kill_idlers(int me)
-{
-#ifdef CONFIG_MODE_TT
- struct task_struct *p;
- int i;
-
- for(i = 0; i < ARRAY_SIZE(idle_threads); i++){
- p = idle_threads[i];
- if((p != NULL) && (p->thread.mode.tt.extern_pid != me))
- os_kill_process(p->thread.mode.tt.extern_pid, 0);
- }
-#endif
-}
-#endif
-
static void kill_off_processes(void)
{
CHOOSE_MODE(kill_off_processes_tt(), kill_off_processes_skas());
-#ifdef CONFIG_SMP
- kill_idlers(os_getpid());
-#endif
}
void uml_cleanup(void)
diff --git a/arch/um/kernel/smp.c b/arch/um/kernel/smp.c
index e6a7778..15bb543 100644
--- a/arch/um/kernel/smp.c
+++ b/arch/um/kernel/smp.c
@@ -95,7 +95,6 @@
static struct task_struct *idle_thread(int cpu)
{
struct task_struct *new_task;
- unsigned char c;
current->thread.request.u.thread.proc = idle_proc;
current->thread.request.u.thread.arg = (void *) cpu;
@@ -108,9 +107,7 @@
{ .pid = new_task->thread.mode.tt.extern_pid,
.task = new_task } );
idle_threads[cpu] = new_task;
- CHOOSE_MODE(os_write_file(new_task->thread.mode.tt.switch_pipe[1], &c,
- sizeof(c)),
- ({ panic("skas mode doesn't support SMP"); }));
+ panic("skas mode doesn't support SMP");
return new_task;
}
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c
index 3850d53..c517c44 100644
--- a/arch/um/kernel/trap.c
+++ b/arch/um/kernel/trap.c
@@ -29,9 +29,7 @@
#include "sysdep/sigcontext.h"
#include "sysdep/ptrace.h"
#include "os.h"
-#ifdef CONFIG_MODE_SKAS
#include "skas.h"
-#endif
#include "os.h"
/* Note this is constrained to return 0, -EFAULT, -EACCESS, -ENOMEM by segv(). */
diff --git a/arch/um/kernel/tt/Makefile b/arch/um/kernel/tt/Makefile
deleted file mode 100644
index 6939e5a..0000000
--- a/arch/um/kernel/tt/Makefile
+++ /dev/null
@@ -1,14 +0,0 @@
-#
-# Copyright (C) 2002 - 2003 Jeff Dike (jdike@addtoit.com)
-# Licensed under the GPL
-#
-
-obj-y = exec_kern.o exec_user.o gdb.o ksyms.o mem.o mem_user.o process_kern.o \
- syscall_kern.o syscall_user.o tlb.o tracer.o trap_user.o \
- uaccess.o uaccess_user.o
-
-obj-$(CONFIG_PT_PROXY) += gdb_kern.o ptproxy/
-
-USER_OBJS := gdb.o tracer.o
-
-include arch/um/scripts/Makefile.rules
diff --git a/arch/um/kernel/tt/exec_kern.c b/arch/um/kernel/tt/exec_kern.c
deleted file mode 100644
index 40126cb..0000000
--- a/arch/um/kernel/tt/exec_kern.c
+++ /dev/null
@@ -1,84 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include "linux/kernel.h"
-#include "linux/mm.h"
-#include "asm/signal.h"
-#include "asm/ptrace.h"
-#include "asm/uaccess.h"
-#include "asm/pgalloc.h"
-#include "asm/tlbflush.h"
-#include "kern_util.h"
-#include "irq_user.h"
-#include "mem_user.h"
-#include "os.h"
-#include "tlb.h"
-#include "mode.h"
-
-static int exec_tramp(void *sig_stack)
-{
- init_new_thread_stack(sig_stack, NULL);
- init_new_thread_signals();
- os_stop_process(os_getpid());
- return(0);
-}
-
-void flush_thread_tt(void)
-{
- unsigned long stack;
- int new_pid;
-
- stack = alloc_stack(0, 0);
- if(stack == 0){
- printk(KERN_ERR
- "flush_thread : failed to allocate temporary stack\n");
- do_exit(SIGKILL);
- }
-
- new_pid = start_fork_tramp(task_stack_page(current), stack, 0, exec_tramp);
- if(new_pid < 0){
- printk(KERN_ERR
- "flush_thread : new thread failed, errno = %d\n",
- -new_pid);
- do_exit(SIGKILL);
- }
-
- if(current_thread->cpu == 0)
- forward_interrupts(new_pid);
- current->thread.request.op = OP_EXEC;
- current->thread.request.u.exec.pid = new_pid;
- unprotect_stack((unsigned long) current_thread);
- os_usr1_process(os_getpid());
- change_sig(SIGUSR1, 1);
-
- change_sig(SIGUSR1, 0);
- enable_timer();
- free_page(stack);
- protect_memory(uml_reserved, high_physmem - uml_reserved, 1, 1, 0, 1);
- stack_protections((unsigned long) current_thread);
- force_flush_all();
- unblock_signals();
-}
-
-void start_thread_tt(struct pt_regs *regs, unsigned long eip,
- unsigned long esp)
-{
- set_fs(USER_DS);
- flush_tlb_mm(current->mm);
- PT_REGS_IP(regs) = eip;
- PT_REGS_SP(regs) = esp;
- PT_FIX_EXEC_STACK(esp);
-}
-
-/*
- * 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/tt/exec_user.c b/arch/um/kernel/tt/exec_user.c
deleted file mode 100644
index 7b5f218..0000000
--- a/arch/um/kernel/tt/exec_user.c
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include <stdio.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <sched.h>
-#include <errno.h>
-#include <sys/wait.h>
-#include <signal.h>
-#include "kern_util.h"
-#include "user.h"
-#include "ptrace_user.h"
-#include "os.h"
-
-void do_exec(int old_pid, int new_pid)
-{
- unsigned long regs[FRAME_SIZE];
- int err;
-
- if((ptrace(PTRACE_ATTACH, new_pid, 0, 0) < 0) ||
- (ptrace(PTRACE_CONT, new_pid, 0, 0) < 0))
- tracer_panic("do_exec failed to attach proc - errno = %d",
- errno);
-
- CATCH_EINTR(err = waitpid(new_pid, 0, WUNTRACED));
- if (err < 0)
- tracer_panic("do_exec failed to attach proc in waitpid - errno = %d",
- errno);
-
- if(ptrace_getregs(old_pid, regs) < 0)
- tracer_panic("do_exec failed to get registers - errno = %d",
- errno);
-
- os_kill_ptraced_process(old_pid, 0);
-
- if (ptrace(PTRACE_OLDSETOPTIONS, new_pid, 0, (void *)PTRACE_O_TRACESYSGOOD) < 0)
- tracer_panic("do_exec: PTRACE_SETOPTIONS failed, errno = %d", errno);
-
- if(ptrace_setregs(new_pid, regs) < 0)
- tracer_panic("do_exec failed to start new proc - errno = %d",
- errno);
-}
-
-/*
- * 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/tt/gdb.c b/arch/um/kernel/tt/gdb.c
deleted file mode 100644
index 030e465..0000000
--- 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:
- */
diff --git a/arch/um/kernel/tt/gdb_kern.c b/arch/um/kernel/tt/gdb_kern.c
deleted file mode 100644
index 03b06bc..0000000
--- a/arch/um/kernel/tt/gdb_kern.c
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include "linux/init.h"
-#include "mconsole_kern.h"
-
-#ifdef CONFIG_MCONSOLE
-
-extern int gdb_config(char *str, char **error_out);
-extern int gdb_remove(int n, char **error_out);
-
-static struct mc_device gdb_mc = {
- .list = INIT_LIST_HEAD(gdb_mc.list),
- .name = "gdb",
- .config = gdb_config,
- .remove = gdb_remove,
-};
-
-int gdb_mc_init(void)
-{
- mconsole_register_dev(&gdb_mc);
- return(0);
-}
-
-__initcall(gdb_mc_init);
-
-#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/tt/include/mode-tt.h b/arch/um/kernel/tt/include/mode-tt.h
deleted file mode 100644
index e171e15..0000000
--- a/arch/um/kernel/tt/include/mode-tt.h
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#ifndef __MODE_TT_H__
-#define __MODE_TT_H__
-
-#include "sysdep/ptrace.h"
-
-enum { OP_NONE, OP_EXEC, OP_FORK, OP_TRACE_ON, OP_REBOOT, OP_HALT, OP_CB };
-
-extern int tracing_pid;
-
-extern int tracer(int (*init_proc)(void *), void *sp);
-extern void sig_handler_common_tt(int sig, void *sc);
-extern void syscall_handler_tt(int sig, union uml_pt_regs *regs);
-extern void reboot_tt(void);
-extern void halt_tt(void);
-extern int is_tracer_winch(int pid, int fd, void *data);
-extern void kill_off_processes_tt(void);
-
-#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/tt/ksyms.c b/arch/um/kernel/tt/ksyms.c
deleted file mode 100644
index 84a9385..0000000
--- a/arch/um/kernel/tt/ksyms.c
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include "linux/module.h"
-#include "asm/uaccess.h"
-#include "mode.h"
-
-EXPORT_SYMBOL(__do_copy_from_user);
-EXPORT_SYMBOL(__do_copy_to_user);
-EXPORT_SYMBOL(__do_strncpy_from_user);
-EXPORT_SYMBOL(__do_strnlen_user);
-EXPORT_SYMBOL(__do_clear_user);
-EXPORT_SYMBOL(clear_user_tt);
-
-EXPORT_SYMBOL(tracing_pid);
-EXPORT_SYMBOL(honeypot);
-
-/*
- * 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/tt/mem.c b/arch/um/kernel/tt/mem.c
deleted file mode 100644
index d0c3c49..0000000
--- a/arch/um/kernel/tt/mem.c
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include "linux/stddef.h"
-#include "linux/mm.h"
-#include "asm/uaccess.h"
-#include "mem_user.h"
-#include "kern_util.h"
-#include "kern.h"
-#include "tt.h"
-
-void before_mem_tt(unsigned long brk_start)
-{
- if(debug)
- remap_data(UML_ROUND_DOWN(&_stext), UML_ROUND_UP(&_etext), 1);
- remap_data(UML_ROUND_DOWN(&_sdata), UML_ROUND_UP(&_edata), 1);
- remap_data(UML_ROUND_DOWN(&__bss_start), UML_ROUND_UP(&_end), 1);
-}
-
-#define SIZE ((CONFIG_NEST_LEVEL + CONFIG_KERNEL_HALF_GIGS) * 0x20000000)
-#define START (CONFIG_TOP_ADDR - SIZE)
-
-unsigned long set_task_sizes_tt(unsigned long *task_size_out)
-{
- unsigned long host_task_size;
-
- /* Round up to the nearest 4M */
- host_task_size = ROUND_4M((unsigned long) &host_task_size);
- *task_size_out = START;
-
- return host_task_size;
-}
diff --git a/arch/um/kernel/tt/mem_user.c b/arch/um/kernel/tt/mem_user.c
deleted file mode 100644
index 9774f63..0000000
--- a/arch/um/kernel/tt/mem_user.c
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include <sys/mman.h>
-#include "tt.h"
-#include "mem_user.h"
-#include "os.h"
-
-void remap_data(void *segment_start, void *segment_end, int w)
-{
- void *addr;
- unsigned long size;
- int data, prot;
-
- if(w) prot = PROT_WRITE;
- else prot = 0;
- prot |= PROT_READ | PROT_EXEC;
- size = (unsigned long) segment_end -
- (unsigned long) segment_start;
- data = create_mem_file(size);
- addr = mmap(NULL, size, PROT_WRITE | PROT_READ, MAP_SHARED, data, 0);
- if(addr == MAP_FAILED){
- perror("mapping new data segment");
- exit(1);
- }
- memcpy(addr, segment_start, size);
- if(switcheroo(data, prot, addr, segment_start, size) < 0){
- printf("switcheroo failed\n");
- exit(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:
- */
diff --git a/arch/um/kernel/tt/process_kern.c b/arch/um/kernel/tt/process_kern.c
deleted file mode 100644
index 74347ad..0000000
--- a/arch/um/kernel/tt/process_kern.c
+++ /dev/null
@@ -1,461 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include "linux/sched.h"
-#include "linux/signal.h"
-#include "linux/kernel.h"
-#include "linux/interrupt.h"
-#include "linux/ptrace.h"
-#include "asm/system.h"
-#include "asm/pgalloc.h"
-#include "asm/ptrace.h"
-#include "asm/tlbflush.h"
-#include "irq_user.h"
-#include "kern_util.h"
-#include "os.h"
-#include "kern.h"
-#include "sigcontext.h"
-#include "mem_user.h"
-#include "tlb.h"
-#include "mode.h"
-#include "mode_kern.h"
-#include "init.h"
-#include "tt.h"
-
-void switch_to_tt(void *prev, void *next)
-{
- struct task_struct *from, *to, *prev_sched;
- unsigned long flags;
- int err, vtalrm, alrm, prof, cpu;
- char c;
-
- from = prev;
- to = next;
-
- cpu = task_thread_info(from)->cpu;
- if(cpu == 0)
- forward_interrupts(to->thread.mode.tt.extern_pid);
-#ifdef CONFIG_SMP
- forward_ipi(cpu_data[cpu].ipi_pipe[0], to->thread.mode.tt.extern_pid);
-#endif
- local_irq_save(flags);
-
- vtalrm = change_sig(SIGVTALRM, 0);
- alrm = change_sig(SIGALRM, 0);
- prof = change_sig(SIGPROF, 0);
-
- forward_pending_sigio(to->thread.mode.tt.extern_pid);
-
- c = 0;
-
- /* Notice that here we "up" the semaphore on which "to" is waiting, and
- * below (the read) we wait on this semaphore (which is implemented by
- * switch_pipe) and go sleeping. Thus, after that, we have resumed in
- * "to", and can't use any more the value of "from" (which is outdated),
- * nor the value in "to" (since it was the task which stole us the CPU,
- * which we don't care about). */
-
- err = os_write_file(to->thread.mode.tt.switch_pipe[1], &c, sizeof(c));
- if(err != sizeof(c))
- panic("write of switch_pipe failed, err = %d", -err);
-
- if(from->thread.mode.tt.switch_pipe[0] == -1)
- os_kill_process(os_getpid(), 0);
-
- err = os_read_file(from->thread.mode.tt.switch_pipe[0], &c,
- sizeof(c));
- if(err != sizeof(c))
- panic("read of switch_pipe failed, errno = %d", -err);
-
- /* If the process that we have just scheduled away from has exited,
- * then it needs to be killed here. The reason is that, even though
- * it will kill itself when it next runs, that may be too late. Its
- * stack will be freed, possibly before then, and if that happens,
- * we have a use-after-free situation. So, it gets killed here
- * in case it has not already killed itself.
- */
- prev_sched = current->thread.prev_sched;
- if(prev_sched->thread.mode.tt.switch_pipe[0] == -1)
- os_kill_process(prev_sched->thread.mode.tt.extern_pid, 1);
-
- change_sig(SIGVTALRM, vtalrm);
- change_sig(SIGALRM, alrm);
- change_sig(SIGPROF, prof);
-
- arch_switch_to_tt(prev_sched, current);
-
- flush_tlb_all();
- local_irq_restore(flags);
-}
-
-void release_thread_tt(struct task_struct *task)
-{
- int pid = task->thread.mode.tt.extern_pid;
-
- /*
- * We first have to kill the other process, before
- * closing its switch_pipe. Else it might wake up
- * and receive "EOF" before we could kill it.
- */
- if(os_getpid() != pid)
- os_kill_process(pid, 0);
-
- os_close_file(task->thread.mode.tt.switch_pipe[0]);
- os_close_file(task->thread.mode.tt.switch_pipe[1]);
- /* use switch_pipe as flag: thread is released */
- task->thread.mode.tt.switch_pipe[0] = -1;
-}
-
-void suspend_new_thread(int fd)
-{
- int err;
- char c;
-
- os_stop_process(os_getpid());
- err = os_read_file(fd, &c, sizeof(c));
- if(err != sizeof(c))
- panic("read failed in suspend_new_thread, err = %d", -err);
-}
-
-void schedule_tail(struct task_struct *prev);
-
-static void new_thread_handler(int sig)
-{
- unsigned long disable;
- int (*fn)(void *);
- void *arg;
-
- fn = current->thread.request.u.thread.proc;
- arg = current->thread.request.u.thread.arg;
-
- UPT_SC(¤t->thread.regs.regs) = (void *) (&sig + 1);
- disable = (1 << (SIGVTALRM - 1)) | (1 << (SIGALRM - 1)) |
- (1 << (SIGIO - 1)) | (1 << (SIGPROF - 1));
- SC_SIGMASK(UPT_SC(¤t->thread.regs.regs)) &= ~disable;
-
- suspend_new_thread(current->thread.mode.tt.switch_pipe[0]);
-
- force_flush_all();
- if(current->thread.prev_sched != NULL)
- schedule_tail(current->thread.prev_sched);
- current->thread.prev_sched = NULL;
-
- init_new_thread_signals();
- enable_timer();
- free_page(current->thread.temp_stack);
- set_cmdline("(kernel thread)");
-
- change_sig(SIGUSR1, 1);
- change_sig(SIGPROF, 1);
- local_irq_enable();
- if(!run_kernel_thread(fn, arg, ¤t->thread.exec_buf))
- do_exit(0);
-
- /* XXX No set_user_mode here because a newly execed process will
- * immediately segfault on its non-existent IP, coming straight back
- * to the signal handler, which will call set_user_mode on its way
- * out. This should probably change since it's confusing.
- */
-}
-
-static int new_thread_proc(void *stack)
-{
- /* local_irq_disable is needed to block out signals until this thread is
- * properly scheduled. Otherwise, the tracing thread will get mighty
- * upset about any signals that arrive before that.
- * This has the complication that it sets the saved signal mask in
- * the sigcontext to block signals. This gets restored when this
- * thread (or a descendant, since they get a copy of this sigcontext)
- * returns to userspace.
- * So, this is compensated for elsewhere.
- * XXX There is still a small window until local_irq_disable() actually
- * finishes where signals are possible - shouldn't be a problem in
- * practice since SIGIO hasn't been forwarded here yet, and the
- * local_irq_disable should finish before a SIGVTALRM has time to be
- * delivered.
- */
-
- local_irq_disable();
- init_new_thread_stack(stack, new_thread_handler);
- os_usr1_process(os_getpid());
- change_sig(SIGUSR1, 1);
- return(0);
-}
-
-/* Signal masking - signals are blocked at the start of fork_tramp. They
- * are re-enabled when finish_fork_handler is entered by fork_tramp hitting
- * itself with a SIGUSR1. set_user_mode has to be run with SIGUSR1 off,
- * so it is blocked before it's called. They are re-enabled on sigreturn
- * despite the fact that they were blocked when the SIGUSR1 was issued because
- * copy_thread copies the parent's sigcontext, including the signal mask
- * onto the signal frame.
- */
-
-void finish_fork_handler(int sig)
-{
- UPT_SC(¤t->thread.regs.regs) = (void *) (&sig + 1);
- suspend_new_thread(current->thread.mode.tt.switch_pipe[0]);
-
- force_flush_all();
- if(current->thread.prev_sched != NULL)
- schedule_tail(current->thread.prev_sched);
- current->thread.prev_sched = NULL;
-
- enable_timer();
- change_sig(SIGVTALRM, 1);
- local_irq_enable();
- if(current->mm != current->parent->mm)
- protect_memory(uml_reserved, high_physmem - uml_reserved, 1,
- 1, 0, 1);
- stack_protections((unsigned long) current_thread);
-
- free_page(current->thread.temp_stack);
- local_irq_disable();
- change_sig(SIGUSR1, 0);
- set_user_mode(current);
-}
-
-int fork_tramp(void *stack)
-{
- local_irq_disable();
- arch_init_thread();
- init_new_thread_stack(stack, finish_fork_handler);
-
- os_usr1_process(os_getpid());
- change_sig(SIGUSR1, 1);
- return(0);
-}
-
-int copy_thread_tt(int nr, unsigned long clone_flags, unsigned long sp,
- unsigned long stack_top, struct task_struct * p,
- struct pt_regs *regs)
-{
- int (*tramp)(void *);
- int new_pid, err;
- unsigned long stack;
-
- if(current->thread.forking)
- tramp = fork_tramp;
- else {
- tramp = new_thread_proc;
- p->thread.request.u.thread = current->thread.request.u.thread;
- }
-
- err = os_pipe(p->thread.mode.tt.switch_pipe, 1, 1);
- if(err < 0){
- printk("copy_thread : pipe failed, err = %d\n", -err);
- return(err);
- }
-
- stack = alloc_stack(0, 0);
- if(stack == 0){
- printk(KERN_ERR "copy_thread : failed to allocate "
- "temporary stack\n");
- return(-ENOMEM);
- }
-
- clone_flags &= CLONE_VM;
- p->thread.temp_stack = stack;
- new_pid = start_fork_tramp(task_stack_page(p), stack, clone_flags, tramp);
- if(new_pid < 0){
- printk(KERN_ERR "copy_thread : clone failed - errno = %d\n",
- -new_pid);
- return(new_pid);
- }
-
- if(current->thread.forking){
- sc_to_sc(UPT_SC(&p->thread.regs.regs), UPT_SC(®s->regs));
- SC_SET_SYSCALL_RETURN(UPT_SC(&p->thread.regs.regs), 0);
- if(sp != 0)
- SC_SP(UPT_SC(&p->thread.regs.regs)) = sp;
- }
- p->thread.mode.tt.extern_pid = new_pid;
-
- current->thread.request.op = OP_FORK;
- current->thread.request.u.fork.pid = new_pid;
- os_usr1_process(os_getpid());
-
- /* Enable the signal and then disable it to ensure that it is handled
- * here, and nowhere else.
- */
- change_sig(SIGUSR1, 1);
-
- change_sig(SIGUSR1, 0);
- err = 0;
- return(err);
-}
-
-void reboot_tt(void)
-{
- current->thread.request.op = OP_REBOOT;
- os_usr1_process(os_getpid());
- change_sig(SIGUSR1, 1);
-}
-
-void halt_tt(void)
-{
- current->thread.request.op = OP_HALT;
- os_usr1_process(os_getpid());
- change_sig(SIGUSR1, 1);
-}
-
-void kill_off_processes_tt(void)
-{
- struct task_struct *p;
- int me;
-
- me = os_getpid();
- for_each_process(p){
- if(p->thread.mode.tt.extern_pid != me)
- os_kill_process(p->thread.mode.tt.extern_pid, 0);
- }
- if(init_task.thread.mode.tt.extern_pid != me)
- os_kill_process(init_task.thread.mode.tt.extern_pid, 0);
-}
-
-void initial_thread_cb_tt(void (*proc)(void *), void *arg)
-{
- if(os_getpid() == tracing_pid){
- (*proc)(arg);
- }
- else {
- current->thread.request.op = OP_CB;
- current->thread.request.u.cb.proc = proc;
- current->thread.request.u.cb.arg = arg;
- os_usr1_process(os_getpid());
- change_sig(SIGUSR1, 1);
-
- change_sig(SIGUSR1, 0);
- }
-}
-
-int do_proc_op(void *t, int proc_id)
-{
- struct task_struct *task;
- struct thread_struct *thread;
- int op, pid;
-
- task = t;
- thread = &task->thread;
- op = thread->request.op;
- switch(op){
- case OP_NONE:
- case OP_TRACE_ON:
- break;
- case OP_EXEC:
- pid = thread->request.u.exec.pid;
- do_exec(thread->mode.tt.extern_pid, pid);
- thread->mode.tt.extern_pid = pid;
- cpu_tasks[task_thread_info(task)->cpu].pid = pid;
- break;
- case OP_FORK:
- attach_process(thread->request.u.fork.pid);
- break;
- case OP_CB:
- (*thread->request.u.cb.proc)(thread->request.u.cb.arg);
- break;
- case OP_REBOOT:
- case OP_HALT:
- break;
- default:
- tracer_panic("Bad op in do_proc_op");
- break;
- }
- thread->request.op = OP_NONE;
- return(op);
-}
-
-void init_idle_tt(void)
-{
- default_idle();
-}
-
-extern void start_kernel(void);
-
-static int start_kernel_proc(void *unused)
-{
- int pid;
-
- block_signals();
- pid = os_getpid();
-
- cpu_tasks[0].pid = pid;
- cpu_tasks[0].task = current;
-#ifdef CONFIG_SMP
- cpu_online_map = cpumask_of_cpu(0);
-#endif
- if(debug) os_stop_process(pid);
- start_kernel();
- return(0);
-}
-
-void set_tracing(void *task, int tracing)
-{
- ((struct task_struct *) task)->thread.mode.tt.tracing = tracing;
-}
-
-int is_tracing(void *t)
-{
- return (((struct task_struct *) t)->thread.mode.tt.tracing);
-}
-
-int set_user_mode(void *t)
-{
- struct task_struct *task;
-
- task = t ? t : current;
- if(task->thread.mode.tt.tracing)
- return(1);
- task->thread.request.op = OP_TRACE_ON;
- os_usr1_process(os_getpid());
- return(0);
-}
-
-void set_init_pid(int pid)
-{
- int err;
-
- init_task.thread.mode.tt.extern_pid = pid;
- err = os_pipe(init_task.thread.mode.tt.switch_pipe, 1, 1);
- if(err)
- panic("Can't create switch pipe for init_task, errno = %d",
- -err);
-}
-
-int start_uml_tt(void)
-{
- void *sp;
- int pages;
-
- pages = (1 << CONFIG_KERNEL_STACK_ORDER);
- sp = task_stack_page(&init_task) +
- pages * PAGE_SIZE - sizeof(unsigned long);
- return(tracer(start_kernel_proc, sp));
-}
-
-int external_pid_tt(struct task_struct *task)
-{
- return(task->thread.mode.tt.extern_pid);
-}
-
-int thread_pid_tt(struct task_struct *task)
-{
- return(task->thread.mode.tt.extern_pid);
-}
-
-int is_valid_pid(int pid)
-{
- struct task_struct *task;
-
- read_lock(&tasklist_lock);
- for_each_process(task){
- if(task->thread.mode.tt.extern_pid == pid){
- read_unlock(&tasklist_lock);
- return(1);
- }
- }
- read_unlock(&tasklist_lock);
- return(0);
-}
diff --git a/arch/um/kernel/tt/ptproxy/Makefile b/arch/um/kernel/tt/ptproxy/Makefile
deleted file mode 100644
index 3ad5b77..0000000
--- a/arch/um/kernel/tt/ptproxy/Makefile
+++ /dev/null
@@ -1,10 +0,0 @@
-#
-# Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
-# Licensed under the GPL
-#
-
-obj-y = proxy.o ptrace.o sysdep.o wait.o
-
-USER_OBJS := $(obj-y)
-
-include arch/um/scripts/Makefile.rules
diff --git a/arch/um/kernel/tt/ptproxy/proxy.c b/arch/um/kernel/tt/ptproxy/proxy.c
deleted file mode 100644
index 420c23f..0000000
--- a/arch/um/kernel/tt/ptproxy/proxy.c
+++ /dev/null
@@ -1,377 +0,0 @@
-/**********************************************************************
-proxy.c
-
-Copyright (C) 1999 Lars Brinkhoff. See the file COPYING for licensing
-terms and conditions.
-
-Jeff Dike (jdike@karaya.com) : Modified for integration into uml
-**********************************************************************/
-
-/* XXX This file shouldn't refer to CONFIG_* */
-
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <signal.h>
-#include <string.h>
-#include <termios.h>
-#include <sys/wait.h>
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include <asm/unistd.h>
-#include "ptrace_user.h"
-
-#include "ptproxy.h"
-#include "sysdep.h"
-#include "wait.h"
-
-#include "user.h"
-#include "os.h"
-#include "tempfile.h"
-
-static int debugger_wait(debugger_state *debugger, int *status, int options,
- int (*syscall)(debugger_state *debugger, pid_t child),
- int (*normal_return)(debugger_state *debugger,
- pid_t unused),
- int (*wait_return)(debugger_state *debugger,
- pid_t unused))
-{
- if(debugger->real_wait){
- debugger->handle_trace = normal_return;
- syscall_continue(debugger->pid);
- debugger->real_wait = 0;
- return(1);
- }
- debugger->wait_status_ptr = status;
- debugger->wait_options = options;
- if((debugger->debugee != NULL) && debugger->debugee->event){
- syscall_continue(debugger->pid);
- wait_for_stop(debugger->pid, SIGTRAP, PTRACE_SYSCALL,
- NULL);
- (*wait_return)(debugger, -1);
- return(0);
- }
- else if(debugger->wait_options & WNOHANG){
- syscall_cancel(debugger->pid, 0);
- debugger->handle_trace = syscall;
- return(0);
- }
- else {
- syscall_pause(debugger->pid);
- debugger->handle_trace = wait_return;
- debugger->waiting = 1;
- }
- return(1);
-}
-
-/*
- * Handle debugger trap, i.e. syscall.
- */
-
-int debugger_syscall(debugger_state *debugger, pid_t child)
-{
- long arg1, arg2, arg3, arg4, arg5, result;
- int syscall, ret = 0;
-
- syscall = get_syscall(debugger->pid, &arg1, &arg2, &arg3, &arg4,
- &arg5);
-
- switch(syscall){
- case __NR_execve:
- /* execve never returns */
- debugger->handle_trace = debugger_syscall;
- break;
-
- case __NR_ptrace:
- if(debugger->debugee->pid != 0) arg2 = debugger->debugee->pid;
- if(!debugger->debugee->in_context)
- child = debugger->debugee->pid;
- result = proxy_ptrace(debugger, arg1, arg2, arg3, arg4, child,
- &ret);
- syscall_cancel(debugger->pid, result);
- debugger->handle_trace = debugger_syscall;
- return(ret);
-
-#ifdef __NR_waitpid
- case __NR_waitpid:
-#endif
- case __NR_wait4:
- if(!debugger_wait(debugger, (int *) arg2, arg3,
- debugger_syscall, debugger_normal_return,
- proxy_wait_return))
- return(0);
- break;
-
- case __NR_kill:
- if(!debugger->debugee->in_context)
- child = debugger->debugee->pid;
- if(arg1 == debugger->debugee->pid){
- result = kill(child, arg2);
- syscall_cancel(debugger->pid, result);
- debugger->handle_trace = debugger_syscall;
- return(0);
- }
- else debugger->handle_trace = debugger_normal_return;
- break;
-
- default:
- debugger->handle_trace = debugger_normal_return;
- }
-
- syscall_continue(debugger->pid);
- return(0);
-}
-
-/* Used by the tracing thread */
-static debugger_state parent;
-static int parent_syscall(debugger_state *debugger, int pid);
-
-int init_parent_proxy(int pid)
-{
- parent = ((debugger_state) { .pid = pid,
- .wait_options = 0,
- .wait_status_ptr = NULL,
- .waiting = 0,
- .real_wait = 0,
- .expecting_child = 0,
- .handle_trace = parent_syscall,
- .debugee = NULL } );
- return(0);
-}
-
-int parent_normal_return(debugger_state *debugger, pid_t unused)
-{
- debugger->handle_trace = parent_syscall;
- syscall_continue(debugger->pid);
- return(0);
-}
-
-static int parent_syscall(debugger_state *debugger, int pid)
-{
- long arg1, arg2, arg3, arg4, arg5;
- int syscall;
-
- syscall = get_syscall(pid, &arg1, &arg2, &arg3, &arg4, &arg5);
-
- if((syscall == __NR_wait4)
-#ifdef __NR_waitpid
- || (syscall == __NR_waitpid)
-#endif
- ){
- debugger_wait(&parent, (int *) arg2, arg3, parent_syscall,
- parent_normal_return, parent_wait_return);
- }
- else ptrace(PTRACE_SYSCALL, pid, 0, 0);
- return(0);
-}
-
-int debugger_normal_return(debugger_state *debugger, pid_t unused)
-{
- debugger->handle_trace = debugger_syscall;
- syscall_continue(debugger->pid);
- return(0);
-}
-
-void debugger_cancelled_return(debugger_state *debugger, int result)
-{
- debugger->handle_trace = debugger_syscall;
- syscall_set_result(debugger->pid, result);
- syscall_continue(debugger->pid);
-}
-
-/* Used by the tracing thread */
-static debugger_state debugger;
-static debugee_state debugee;
-
-void init_proxy (pid_t debugger_pid, int stopped, int status)
-{
- debugger.pid = debugger_pid;
- debugger.handle_trace = debugger_syscall;
- debugger.debugee = &debugee;
- debugger.waiting = 0;
- debugger.real_wait = 0;
- debugger.expecting_child = 0;
-
- debugee.pid = 0;
- debugee.traced = 0;
- debugee.stopped = stopped;
- debugee.event = 0;
- debugee.zombie = 0;
- debugee.died = 0;
- debugee.wait_status = status;
- debugee.in_context = 1;
-}
-
-int debugger_proxy(int status, int pid)
-{
- int ret = 0, sig;
-
- if(WIFSTOPPED(status)){
- sig = WSTOPSIG(status);
- if (sig == SIGTRAP)
- ret = (*debugger.handle_trace)(&debugger, pid);
-
- else if(sig == SIGCHLD){
- if(debugger.expecting_child){
- ptrace(PTRACE_SYSCALL, debugger.pid, 0, sig);
- debugger.expecting_child = 0;
- }
- else if(debugger.waiting)
- real_wait_return(&debugger);
- else {
- ptrace(PTRACE_SYSCALL, debugger.pid, 0, sig);
- debugger.real_wait = 1;
- }
- }
- else ptrace(PTRACE_SYSCALL, debugger.pid, 0, sig);
- }
- else if(WIFEXITED(status)){
- tracer_panic("debugger (pid %d) exited with status %d",
- debugger.pid, WEXITSTATUS(status));
- }
- else if(WIFSIGNALED(status)){
- tracer_panic("debugger (pid %d) exited with signal %d",
- debugger.pid, WTERMSIG(status));
- }
- else {
- tracer_panic("proxy got unknown status (0x%x) on debugger "
- "(pid %d)", status, debugger.pid);
- }
- return(ret);
-}
-
-void child_proxy(pid_t pid, int status)
-{
- debugee.event = 1;
- debugee.wait_status = status;
-
- if(WIFSTOPPED(status)){
- debugee.stopped = 1;
- debugger.expecting_child = 1;
- kill(debugger.pid, SIGCHLD);
- }
- else if(WIFEXITED(status) || WIFSIGNALED(status)){
- debugee.zombie = 1;
- debugger.expecting_child = 1;
- kill(debugger.pid, SIGCHLD);
- }
- else panic("proxy got unknown status (0x%x) on child (pid %d)",
- status, pid);
-}
-
-void debugger_parent_signal(int status, int pid)
-{
- int sig;
-
- if(WIFSTOPPED(status)){
- sig = WSTOPSIG(status);
- if(sig == SIGTRAP) (*parent.handle_trace)(&parent, pid);
- else ptrace(PTRACE_SYSCALL, pid, 0, sig);
- }
-}
-
-void fake_child_exit(void)
-{
- int status, pid;
-
- child_proxy(1, W_EXITCODE(0, 0));
- while(debugger.waiting == 1){
- CATCH_EINTR(pid = waitpid(debugger.pid, &status, WUNTRACED));
- if(pid != debugger.pid){
- printk("fake_child_exit - waitpid failed, "
- "errno = %d\n", errno);
- return;
- }
- debugger_proxy(status, debugger.pid);
- }
- CATCH_EINTR(pid = waitpid(debugger.pid, &status, WUNTRACED));
- if(pid != debugger.pid){
- printk("fake_child_exit - waitpid failed, "
- "errno = %d\n", errno);
- return;
- }
- if(ptrace(PTRACE_DETACH, debugger.pid, 0, SIGCONT) < 0)
- printk("fake_child_exit - PTRACE_DETACH failed, errno = %d\n",
- errno);
-}
-
-char gdb_init_string[] =
-"att 1 \n\
-b panic \n\
-b stop \n\
-handle SIGWINCH nostop noprint pass \n\
-";
-
-int start_debugger(char *prog, int startup, int stop, int *fd_out)
-{
- int slave, child;
-
- slave = open_gdb_chan();
- child = fork();
- if(child == 0){
- char *tempname = NULL;
- int fd;
-
- if(setsid() < 0) perror("setsid");
- if((dup2(slave, 0) < 0) || (dup2(slave, 1) < 0) ||
- (dup2(slave, 2) < 0)){
- printk("start_debugger : dup2 failed, errno = %d\n",
- errno);
- exit(1);
- }
- if(ioctl(0, TIOCSCTTY, 0) < 0){
- printk("start_debugger : TIOCSCTTY failed, "
- "errno = %d\n", errno);
- exit(1);
- }
- if(tcsetpgrp (1, os_getpid()) < 0){
- printk("start_debugger : tcsetpgrp failed, "
- "errno = %d\n", errno);
-#ifdef notdef
- exit(1);
-#endif
- }
- fd = make_tempfile("/tmp/gdb_init-XXXXXX", &tempname, 0);
- if(fd < 0){
- printk("start_debugger : make_tempfile failed,"
- "err = %d\n", -fd);
- exit(1);
- }
- os_write_file(fd, gdb_init_string,
- sizeof(gdb_init_string) - 1);
- if(startup){
- if(stop){
- os_write_file(fd, "b start_kernel\n",
- strlen("b start_kernel\n"));
- }
- os_write_file(fd, "c\n", strlen("c\n"));
- }
- if(ptrace(PTRACE_TRACEME, 0, 0, 0) < 0){
- printk("start_debugger : PTRACE_TRACEME failed, "
- "errno = %d\n", errno);
- exit(1);
- }
- execlp("gdb", "gdb", "--command", tempname, prog, NULL);
- printk("start_debugger : exec of gdb failed, errno = %d\n",
- errno);
- }
- if(child < 0){
- printk("start_debugger : fork for gdb failed, errno = %d\n",
- errno);
- return(-1);
- }
- *fd_out = slave;
- return(child);
-}
-
-/*
- * 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/tt/ptproxy/ptproxy.h b/arch/um/kernel/tt/ptproxy/ptproxy.h
deleted file mode 100644
index 5eb0285..0000000
--- a/arch/um/kernel/tt/ptproxy/ptproxy.h
+++ /dev/null
@@ -1,61 +0,0 @@
-/**********************************************************************
-ptproxy.h
-
-Copyright (C) 1999 Lars Brinkhoff. See the file COPYING for licensing
-terms and conditions.
-**********************************************************************/
-
-#ifndef __PTPROXY_H
-#define __PTPROXY_H
-
-#include <sys/types.h>
-
-typedef struct debugger debugger_state;
-typedef struct debugee debugee_state;
-
-struct debugger
-{
- pid_t pid;
- int wait_options;
- int *wait_status_ptr;
- unsigned int waiting : 1;
- unsigned int real_wait : 1;
- unsigned int expecting_child : 1;
- int (*handle_trace) (debugger_state *, pid_t);
-
- debugee_state *debugee;
-};
-
-struct debugee
-{
- pid_t pid;
- int wait_status;
- unsigned int died : 1;
- unsigned int event : 1;
- unsigned int stopped : 1;
- unsigned int trace_singlestep : 1;
- unsigned int trace_syscall : 1;
- unsigned int traced : 1;
- unsigned int zombie : 1;
- unsigned int in_context : 1;
-};
-
-extern int debugger_syscall(debugger_state *debugger, pid_t pid);
-extern int debugger_normal_return (debugger_state *debugger, pid_t unused);
-
-extern long proxy_ptrace (struct debugger *, int, pid_t, long, long, pid_t,
- int *strace_out);
-extern void debugger_cancelled_return(debugger_state *debugger, int result);
-
-#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/tt/ptproxy/ptrace.c b/arch/um/kernel/tt/ptproxy/ptrace.c
deleted file mode 100644
index 4b4f617..0000000
--- a/arch/um/kernel/tt/ptproxy/ptrace.c
+++ /dev/null
@@ -1,237 +0,0 @@
-/**********************************************************************
-ptrace.c
-
-Copyright (C) 1999 Lars Brinkhoff. See the file COPYING for licensing
-terms and conditions.
-
-Jeff Dike (jdike@karaya.com) : Modified for integration into uml
-**********************************************************************/
-
-#include <errno.h>
-#include <unistd.h>
-#include <signal.h>
-#include <sys/types.h>
-#include <sys/time.h>
-#include <sys/wait.h>
-
-#include "ptproxy.h"
-#include "debug.h"
-#include "kern_util.h"
-#include "ptrace_user.h"
-#include "tt.h"
-#include "os.h"
-
-long proxy_ptrace(struct debugger *debugger, int arg1, pid_t arg2,
- long arg3, long arg4, pid_t child, int *ret)
-{
- sigset_t relay;
- long result;
- int status;
-
- *ret = 0;
- if(debugger->debugee->died) return(-ESRCH);
-
- switch(arg1){
- case PTRACE_ATTACH:
- if(debugger->debugee->traced) return(-EPERM);
-
- debugger->debugee->pid = arg2;
- debugger->debugee->traced = 1;
-
- if(is_valid_pid(arg2) && (arg2 != child)){
- debugger->debugee->in_context = 0;
- kill(arg2, SIGSTOP);
- debugger->debugee->event = 1;
- debugger->debugee->wait_status = W_STOPCODE(SIGSTOP);
- }
- else {
- debugger->debugee->in_context = 1;
- if(debugger->debugee->stopped)
- child_proxy(child, W_STOPCODE(SIGSTOP));
- else kill(child, SIGSTOP);
- }
-
- return(0);
-
- case PTRACE_DETACH:
- if(!debugger->debugee->traced) return(-EPERM);
-
- debugger->debugee->traced = 0;
- debugger->debugee->pid = 0;
- if(!debugger->debugee->in_context)
- kill(child, SIGCONT);
-
- return(0);
-
- case PTRACE_CONT:
- if(!debugger->debugee->in_context) return(-EPERM);
- *ret = PTRACE_CONT;
- return(ptrace(PTRACE_CONT, child, arg3, arg4));
-
-#ifdef UM_HAVE_GETFPREGS
- case PTRACE_GETFPREGS:
- {
- long regs[FP_FRAME_SIZE];
- int i, result;
-
- result = ptrace(PTRACE_GETFPREGS, child, 0, regs);
- if(result == -1) return(-errno);
-
- for (i = 0; i < sizeof(regs)/sizeof(regs[0]); i++)
- ptrace(PTRACE_POKEDATA, debugger->pid, arg4 + 4 * i,
- regs[i]);
- return(result);
- }
-#endif
-
-#ifdef UM_HAVE_GETFPXREGS
- case PTRACE_GETFPXREGS:
- {
- long regs[FPX_FRAME_SIZE];
- int i, result;
-
- result = ptrace(PTRACE_GETFPXREGS, child, 0, regs);
- if(result == -1) return(-errno);
-
- for (i = 0; i < sizeof(regs)/sizeof(regs[0]); i++)
- ptrace(PTRACE_POKEDATA, debugger->pid, arg4 + 4 * i,
- regs[i]);
- return(result);
- }
-#endif
-
-#ifdef UM_HAVE_GETREGS
- case PTRACE_GETREGS:
- {
- long regs[FRAME_SIZE];
- int i, result;
-
- result = ptrace(PTRACE_GETREGS, child, 0, regs);
- if(result == -1) return(-errno);
-
- for (i = 0; i < sizeof(regs)/sizeof(regs[0]); i++)
- ptrace (PTRACE_POKEDATA, debugger->pid,
- arg4 + 4 * i, regs[i]);
- return(result);
- }
- break;
-#endif
-
- case PTRACE_KILL:
- result = ptrace(PTRACE_KILL, child, arg3, arg4);
- if(result == -1) return(-errno);
-
- return(result);
-
- case PTRACE_PEEKDATA:
- case PTRACE_PEEKTEXT:
- case PTRACE_PEEKUSR:
- /* The value being read out could be -1, so we have to
- * check errno to see if there's an error, and zero it
- * beforehand so we're not faked out by an old error
- */
-
- errno = 0;
- result = ptrace(arg1, child, arg3, 0);
- if((result == -1) && (errno != 0)) return(-errno);
-
- result = ptrace(PTRACE_POKEDATA, debugger->pid, arg4, result);
- if(result == -1) return(-errno);
-
- return(result);
-
- case PTRACE_POKEDATA:
- case PTRACE_POKETEXT:
- case PTRACE_POKEUSR:
- result = ptrace(arg1, child, arg3, arg4);
- if(result == -1) return(-errno);
-
- if(arg1 == PTRACE_POKEUSR) ptrace_pokeuser(arg3, arg4);
- return(result);
-
-#ifdef UM_HAVE_SETFPREGS
- case PTRACE_SETFPREGS:
- {
- long regs[FP_FRAME_SIZE];
- int i;
-
- for (i = 0; i < sizeof(regs)/sizeof(regs[0]); i++)
- regs[i] = ptrace (PTRACE_PEEKDATA, debugger->pid,
- arg4 + 4 * i, 0);
- result = ptrace(PTRACE_SETFPREGS, child, 0, regs);
- if(result == -1) return(-errno);
-
- return(result);
- }
-#endif
-
-#ifdef UM_HAVE_SETFPXREGS
- case PTRACE_SETFPXREGS:
- {
- long regs[FPX_FRAME_SIZE];
- int i;
-
- for (i = 0; i < sizeof(regs)/sizeof(regs[0]); i++)
- regs[i] = ptrace (PTRACE_PEEKDATA, debugger->pid,
- arg4 + 4 * i, 0);
- result = ptrace(PTRACE_SETFPXREGS, child, 0, regs);
- if(result == -1) return(-errno);
-
- return(result);
- }
-#endif
-
-#ifdef UM_HAVE_SETREGS
- case PTRACE_SETREGS:
- {
- long regs[FRAME_SIZE];
- int i;
-
- for (i = 0; i < sizeof(regs)/sizeof(regs[0]); i++)
- regs[i] = ptrace(PTRACE_PEEKDATA, debugger->pid,
- arg4 + 4 * i, 0);
- result = ptrace(PTRACE_SETREGS, child, 0, regs);
- if(result == -1) return(-errno);
-
- return(result);
- }
-#endif
-
- case PTRACE_SINGLESTEP:
- if(!debugger->debugee->in_context) return(-EPERM);
- sigemptyset(&relay);
- sigaddset(&relay, SIGSEGV);
- sigaddset(&relay, SIGILL);
- sigaddset(&relay, SIGBUS);
- result = ptrace(PTRACE_SINGLESTEP, child, arg3, arg4);
- if(result == -1) return(-errno);
-
- status = wait_for_stop(child, SIGTRAP, PTRACE_SINGLESTEP,
- &relay);
- child_proxy(child, status);
- return(result);
-
- case PTRACE_SYSCALL:
- if(!debugger->debugee->in_context) return(-EPERM);
- result = ptrace(PTRACE_SYSCALL, child, arg3, arg4);
- if(result == -1) return(-errno);
-
- *ret = PTRACE_SYSCALL;
- return(result);
-
- case PTRACE_TRACEME:
- default:
- return(-EINVAL);
- }
-}
-
-/*
- * 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/tt/ptproxy/sysdep.c b/arch/um/kernel/tt/ptproxy/sysdep.c
deleted file mode 100644
index e0e1ab0..0000000
--- a/arch/um/kernel/tt/ptproxy/sysdep.c
+++ /dev/null
@@ -1,70 +0,0 @@
-/**********************************************************************
-sysdep.c
-
-Copyright (C) 1999 Lars Brinkhoff. See the file COPYING for licensing
-terms and conditions.
-**********************************************************************/
-
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <signal.h>
-#include <errno.h>
-#include <sys/types.h>
-#include <linux/unistd.h>
-#include "ptrace_user.h"
-#include "user.h"
-#include "os.h"
-
-int get_syscall(pid_t pid, long *arg1, long *arg2, long *arg3, long *arg4,
- long *arg5)
-{
- *arg1 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG1_OFFSET, 0);
- *arg2 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG2_OFFSET, 0);
- *arg3 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG3_OFFSET, 0);
- *arg4 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG4_OFFSET, 0);
- *arg5 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG5_OFFSET, 0);
- return(ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_NR_OFFSET, 0));
-}
-
-void syscall_cancel(pid_t pid, int result)
-{
- if((ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET,
- __NR_getpid) < 0) ||
- (ptrace(PTRACE_SYSCALL, pid, 0, 0) < 0) ||
- (wait_for_stop(pid, SIGTRAP, PTRACE_SYSCALL, NULL) < 0) ||
- (ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_RET_OFFSET, result) < 0) ||
- (ptrace(PTRACE_SYSCALL, pid, 0, 0) < 0))
- printk("ptproxy: couldn't cancel syscall: errno = %d\n",
- errno);
-}
-
-void syscall_set_result(pid_t pid, long result)
-{
- ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_RET_OFFSET, result);
-}
-
-void syscall_continue(pid_t pid)
-{
- ptrace(PTRACE_SYSCALL, pid, 0, 0);
-}
-
-int syscall_pause(pid_t pid)
-{
- if(ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET, __NR_pause) < 0){
- printk("syscall_change - ptrace failed, errno = %d\n", errno);
- return(-1);
- }
- return(0);
-}
-
-/*
- * 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/tt/ptproxy/sysdep.h b/arch/um/kernel/tt/ptproxy/sysdep.h
deleted file mode 100644
index 735f488..0000000
--- a/arch/um/kernel/tt/ptproxy/sysdep.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/**********************************************************************
-sysdep.h
-
-Copyright (C) 1999 Lars Brinkhoff.
-Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
-See the file COPYING for licensing terms and conditions.
-**********************************************************************/
-
-extern int get_syscall(pid_t pid, long *arg1, long *arg2, long *arg3,
- long *arg4, long *arg5);
-extern void syscall_cancel (pid_t pid, long result);
-extern void syscall_set_result (pid_t pid, long result);
-extern void syscall_continue (pid_t pid);
-extern int syscall_pause(pid_t 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/tt/ptproxy/wait.c b/arch/um/kernel/tt/ptproxy/wait.c
deleted file mode 100644
index bdd4af4..0000000
--- a/arch/um/kernel/tt/ptproxy/wait.c
+++ /dev/null
@@ -1,85 +0,0 @@
-/**********************************************************************
-wait.c
-
-Copyright (C) 1999 Lars Brinkhoff. See the file COPYING for licensing
-terms and conditions.
-
-**********************************************************************/
-
-#include <errno.h>
-#include <signal.h>
-#include <sys/wait.h>
-
-#include "ptproxy.h"
-#include "sysdep.h"
-#include "wait.h"
-#include "ptrace_user.h"
-#include "sysdep/ptrace.h"
-#include "sysdep/sigcontext.h"
-
-int proxy_wait_return(struct debugger *debugger, pid_t unused)
-{
- debugger->waiting = 0;
-
- if(debugger->debugee->died || (debugger->wait_options & __WCLONE)){
- debugger_cancelled_return(debugger, -ECHILD);
- return(0);
- }
-
- if(debugger->debugee->zombie && debugger->debugee->event)
- debugger->debugee->died = 1;
-
- if(debugger->debugee->event){
- debugger->debugee->event = 0;
- ptrace(PTRACE_POKEDATA, debugger->pid,
- debugger->wait_status_ptr,
- debugger->debugee->wait_status);
- /* if (wait4)
- ptrace (PTRACE_POKEDATA, pid, rusage_ptr, ...); */
- debugger_cancelled_return(debugger, debugger->debugee->pid);
- return(0);
- }
-
- /* pause will return -EINTR, which happens to be right for wait */
- debugger_normal_return(debugger, -1);
- return(0);
-}
-
-int parent_wait_return(struct debugger *debugger, pid_t unused)
-{
- return(debugger_normal_return(debugger, -1));
-}
-
-int real_wait_return(struct debugger *debugger)
-{
- unsigned long ip;
- int pid;
-
- pid = debugger->pid;
-
- ip = ptrace(PTRACE_PEEKUSR, pid, PT_IP_OFFSET, 0);
- IP_RESTART_SYSCALL(ip);
-
- if(ptrace(PTRACE_POKEUSR, pid, PT_IP_OFFSET, ip) < 0)
- tracer_panic("real_wait_return : Failed to restart system "
- "call, errno = %d\n", errno);
-
- if((ptrace(PTRACE_SYSCALL, debugger->pid, 0, SIGCHLD) < 0) ||
- (ptrace(PTRACE_SYSCALL, debugger->pid, 0, 0) < 0) ||
- (ptrace(PTRACE_SYSCALL, debugger->pid, 0, 0) < 0) ||
- debugger_normal_return(debugger, -1))
- tracer_panic("real_wait_return : gdb failed to wait, "
- "errno = %d\n", errno);
- return(0);
-}
-
-/*
- * 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/tt/ptproxy/wait.h b/arch/um/kernel/tt/ptproxy/wait.h
deleted file mode 100644
index 542e73e..0000000
--- a/arch/um/kernel/tt/ptproxy/wait.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/**********************************************************************
-wait.h
-
-Copyright (C) 1999 Lars Brinkhoff. See the file COPYING for licensing
-terms and conditions.
-**********************************************************************/
-
-#ifndef __PTPROXY_WAIT_H
-#define __PTPROXY_WAIT_H
-
-extern int proxy_wait_return(struct debugger *debugger, pid_t unused);
-extern int real_wait_return(struct debugger *debugger);
-extern int parent_wait_return(struct debugger *debugger, pid_t unused);
-
-#endif
diff --git a/arch/um/kernel/tt/syscall_kern.c b/arch/um/kernel/tt/syscall_kern.c
deleted file mode 100644
index 293caa6..0000000
--- a/arch/um/kernel/tt/syscall_kern.c
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
- * Licensed under the GPL
- */
-
-#include "linux/types.h"
-#include "linux/utime.h"
-#include "linux/sys.h"
-#include "linux/ptrace.h"
-#include "asm/unistd.h"
-#include "asm/ptrace.h"
-#include "asm/uaccess.h"
-#include "asm/stat.h"
-#include "sysdep/syscalls.h"
-#include "sysdep/sigcontext.h"
-#include "kern_util.h"
-#include "syscall.h"
-
-void syscall_handler_tt(int sig, struct pt_regs *regs)
-{
- void *sc;
- long result;
- int syscall;
-
- sc = UPT_SC(®s->regs);
- SC_START_SYSCALL(sc);
-
- syscall = UPT_SYSCALL_NR(®s->regs);
- syscall_trace(®s->regs, 0);
-
- current->thread.nsyscalls++;
- nsyscalls++;
-
- if((syscall >= NR_syscalls) || (syscall < 0))
- result = -ENOSYS;
- else result = EXECUTE_SYSCALL(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.
- */
- UPT_SC(®s->regs) = sc;
-
- SC_SET_SYSCALL_RETURN(sc, result);
-
- syscall_trace(®s->regs, 1);
-}
diff --git a/arch/um/kernel/tt/syscall_user.c b/arch/um/kernel/tt/syscall_user.c
deleted file mode 100644
index f52b47a..0000000
--- a/arch/um/kernel/tt/syscall_user.c
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include <unistd.h>
-#include <signal.h>
-#include <errno.h>
-#include <asm/unistd.h>
-#include "sysdep/ptrace.h"
-#include "sigcontext.h"
-#include "ptrace_user.h"
-#include "task.h"
-#include "kern_util.h"
-#include "syscall.h"
-#include "tt.h"
-
-void do_sigtrap(void *task)
-{
- UPT_SYSCALL_NR(TASK_REGS(task)) = -1;
-}
-
-void do_syscall(void *task, int pid, int local_using_sysemu)
-{
- unsigned long proc_regs[FRAME_SIZE];
-
- if(ptrace_getregs(pid, proc_regs) < 0)
- tracer_panic("Couldn't read registers");
-
- UPT_SYSCALL_NR(TASK_REGS(task)) = PT_SYSCALL_NR(proc_regs);
-
-#ifdef UPT_ORIGGPR2
- UPT_ORIGGPR2(TASK_REGS(task)) = REGS_ORIGGPR2(proc_regs);
-#endif
-
- if(((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");
-
- /* advanced sysemu mode set syscall number to -1 automatically */
- if (local_using_sysemu==2)
- return;
-
- /* syscall number -1 in sysemu skips syscall restarting in host */
- if(ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET,
- local_using_sysemu ? -1 : __NR_getpid) < 0)
- tracer_panic("do_syscall : Nullifying syscall failed, "
- "errno = %d", errno);
-}
-
-/*
- * 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/tt/tlb.c b/arch/um/kernel/tt/tlb.c
deleted file mode 100644
index 7caa24f..0000000
--- a/arch/um/kernel/tt/tlb.c
+++ /dev/null
@@ -1,120 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Copyright 2003 PathScale, Inc.
- * Licensed under the GPL
- */
-
-#include "linux/stddef.h"
-#include "linux/kernel.h"
-#include "linux/sched.h"
-#include "linux/mm.h"
-#include "asm/page.h"
-#include "asm/pgtable.h"
-#include "asm/uaccess.h"
-#include "asm/tlbflush.h"
-#include "mem_user.h"
-#include "os.h"
-#include "tlb.h"
-
-static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last,
- int finished, void **flush)
-{
- struct host_vm_op *op;
- int i, ret=0;
-
- for(i = 0; i <= last && !ret; i++){
- op = &ops[i];
- switch(op->type){
- case MMAP:
- ret = os_map_memory((void *) op->u.mmap.addr,
- op->u.mmap.fd, op->u.mmap.offset,
- op->u.mmap.len, op->u.mmap.r,
- op->u.mmap.w, op->u.mmap.x);
- break;
- case MUNMAP:
- ret = os_unmap_memory((void *) op->u.munmap.addr,
- op->u.munmap.len);
- break;
- case MPROTECT:
- ret = protect_memory(op->u.mprotect.addr,
- op->u.munmap.len,
- op->u.mprotect.r,
- op->u.mprotect.w,
- op->u.mprotect.x, 1);
- protect_memory(op->u.mprotect.addr, op->u.munmap.len,
- op->u.mprotect.r, op->u.mprotect.w,
- op->u.mprotect.x, 1);
- break;
- default:
- printk("Unknown op type %d in do_ops\n", op->type);
- break;
- }
- }
-
- return ret;
-}
-
-static void fix_range(struct mm_struct *mm, unsigned long start_addr,
- unsigned long end_addr, int force)
-{
- if((current->thread.mode.tt.extern_pid != -1) &&
- (current->thread.mode.tt.extern_pid != os_getpid()))
- panic("fix_range fixing wrong address space, current = 0x%p",
- current);
-
- fix_range_common(mm, start_addr, end_addr, force, do_ops);
-}
-
-atomic_t vmchange_seq = ATOMIC_INIT(1);
-
-void flush_tlb_kernel_range_tt(unsigned long start, unsigned long end)
-{
- if(flush_tlb_kernel_range_common(start, end))
- atomic_inc(&vmchange_seq);
-}
-
-void flush_tlb_kernel_vm_tt(void)
-{
- flush_tlb_kernel_range(start_vm, end_vm);
-}
-
-void __flush_tlb_one_tt(unsigned long addr)
-{
- flush_tlb_kernel_range(addr, addr + PAGE_SIZE);
-}
-
-void flush_tlb_range_tt(struct vm_area_struct *vma, unsigned long start,
- unsigned long end)
-{
- if(vma->vm_mm != current->mm) return;
-
- /* Assumes that the range start ... end is entirely within
- * either process memory or kernel vm
- */
- if((start >= start_vm) && (start < end_vm)){
- if(flush_tlb_kernel_range_common(start, end))
- atomic_inc(&vmchange_seq);
- }
- else fix_range(vma->vm_mm, start, end, 0);
-}
-
-void flush_tlb_mm_tt(struct mm_struct *mm)
-{
- unsigned long seq;
-
- if(mm != current->mm) return;
-
- fix_range(mm, 0, STACK_TOP, 0);
-
- seq = atomic_read(&vmchange_seq);
- if(current->thread.mode.tt.vm_seq == seq)
- return;
- current->thread.mode.tt.vm_seq = seq;
- flush_tlb_kernel_range_common(start_vm, end_vm);
-}
-
-void force_flush_all_tt(void)
-{
- fix_range(current->mm, 0, STACK_TOP, 1);
- flush_tlb_kernel_range_common(start_vm, end_vm);
-}
diff --git a/arch/um/kernel/tt/tracer.c b/arch/um/kernel/tt/tracer.c
deleted file mode 100644
index c235883..0000000
--- a/arch/um/kernel/tt/tracer.c
+++ /dev/null
@@ -1,461 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <unistd.h>
-#include <signal.h>
-#include <errno.h>
-#include <sched.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <sys/time.h>
-#include <sys/wait.h>
-#include "user.h"
-#include "sysdep/ptrace.h"
-#include "sigcontext.h"
-#include "sysdep/sigcontext.h"
-#include "os.h"
-#include "mem_user.h"
-#include "process.h"
-#include "kern_util.h"
-#include "chan_user.h"
-#include "ptrace_user.h"
-#include "irq_user.h"
-#include "mode.h"
-#include "tt.h"
-
-static int tracer_winch[2];
-
-int is_tracer_winch(int pid, int fd, void *data)
-{
- if(pid != os_getpgrp())
- return(0);
-
- register_winch_irq(tracer_winch[0], fd, -1, data);
- return(1);
-}
-
-static void tracer_winch_handler(int sig)
-{
- int n;
- char c = 1;
-
- n = os_write_file(tracer_winch[1], &c, sizeof(c));
- if(n != sizeof(c))
- printk("tracer_winch_handler - write failed, err = %d\n", -n);
-}
-
-/* Called only by the tracing thread during initialization */
-
-static void setup_tracer_winch(void)
-{
- int err;
-
- err = os_pipe(tracer_winch, 1, 1);
- if(err < 0){
- printk("setup_tracer_winch : os_pipe failed, err = %d\n", -err);
- return;
- }
- signal(SIGWINCH, tracer_winch_handler);
-}
-
-void attach_process(int pid)
-{
- if((ptrace(PTRACE_ATTACH, pid, 0, 0) < 0) ||
- (ptrace(PTRACE_CONT, pid, 0, 0) < 0))
- tracer_panic("OP_FORK failed to attach pid");
- wait_for_stop(pid, SIGSTOP, PTRACE_CONT, NULL);
- if (ptrace(PTRACE_OLDSETOPTIONS, pid, 0, (void *)PTRACE_O_TRACESYSGOOD) < 0)
- tracer_panic("OP_FORK: PTRACE_SETOPTIONS failed, errno = %d", errno);
- if(ptrace(PTRACE_CONT, pid, 0, 0) < 0)
- tracer_panic("OP_FORK failed to continue process");
-}
-
-void tracer_panic(char *format, ...)
-{
- va_list ap;
-
- va_start(ap, format);
- vprintf(format, ap);
- va_end(ap);
- printf("\n");
- while(1) pause();
-}
-
-static void tracer_segv(int sig, struct sigcontext sc)
-{
- struct faultinfo fi;
- GET_FAULTINFO_FROM_SC(fi, &sc);
- printf("Tracing thread segfault at address 0x%lx, ip 0x%lx\n",
- FAULT_ADDRESS(fi), SC_IP(&sc));
- while(1)
- pause();
-}
-
-/* Changed early in boot, and then only read */
-int debug = 0;
-int debug_stop = 1;
-int debug_parent = 0;
-int honeypot = 0;
-
-static int signal_tramp(void *arg)
-{
- int (*proc)(void *);
-
- if(honeypot && munmap((void *) (host_task_size - 0x10000000),
- 0x10000000))
- panic("Unmapping stack failed");
- if(ptrace(PTRACE_TRACEME, 0, 0, 0) < 0)
- panic("ptrace PTRACE_TRACEME failed");
- os_stop_process(os_getpid());
- change_sig(SIGWINCH, 0);
- signal(SIGUSR1, SIG_IGN);
- change_sig(SIGCHLD, 0);
- signal(SIGSEGV, (__sighandler_t) sig_handler);
- set_cmdline("(idle thread)");
- set_init_pid(os_getpid());
- init_irq_signals(0);
- proc = arg;
- return((*proc)(NULL));
-}
-
-static void sleeping_process_signal(int pid, int sig)
-{
- switch(sig){
- /* These two result from UML being ^Z-ed and bg-ed. PTRACE_CONT is
- * right because the process must be in the kernel already.
- */
- case SIGCONT:
- case SIGTSTP:
- if(ptrace(PTRACE_CONT, pid, 0, sig) < 0)
- tracer_panic("sleeping_process_signal : Failed to "
- "continue pid %d, signal = %d, "
- "errno = %d\n", pid, sig, errno);
- break;
-
- /* This happens when the debugger (e.g. strace) is doing system call
- * tracing on the kernel. During a context switch, the current task
- * will be set to the incoming process and the outgoing process will
- * hop into write and then read. Since it's not the current process
- * any more, the trace of those will land here. So, we need to just
- * PTRACE_SYSCALL it.
- */
- case (SIGTRAP + 0x80):
- if(ptrace(PTRACE_SYSCALL, pid, 0, 0) < 0)
- tracer_panic("sleeping_process_signal : Failed to "
- "PTRACE_SYSCALL pid %d, errno = %d\n",
- pid, errno);
- break;
- case SIGSTOP:
- break;
- default:
- tracer_panic("sleeping process %d got unexpected "
- "signal : %d\n", pid, sig);
- break;
- }
-}
-
-/* Accessed only by the tracing thread */
-int debugger_pid = -1;
-int debugger_parent = -1;
-int debugger_fd = -1;
-int gdb_pid = -1;
-
-struct {
- int pid;
- int signal;
- unsigned long addr;
- struct timeval time;
-} signal_record[1024][32];
-
-int signal_index[32];
-int nsignals = 0;
-int debug_trace = 0;
-
-extern void signal_usr1(int sig);
-
-int tracing_pid = -1;
-
-int tracer(int (*init_proc)(void *), void *sp)
-{
- void *task = NULL;
- int status, pid = 0, sig = 0, cont_type, tracing = 0, op = 0;
- int proc_id = 0, n, err, old_tracing = 0, strace = 0;
- int local_using_sysemu = 0;
-
- signal(SIGPIPE, SIG_IGN);
- setup_tracer_winch();
- tracing_pid = os_getpid();
- printf("tracing thread pid = %d\n", tracing_pid);
-
- pid = clone(signal_tramp, sp, CLONE_FILES | SIGCHLD, init_proc);
- CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED));
- if(n < 0){
- printf("waitpid on idle thread failed, errno = %d\n", errno);
- exit(1);
- }
- if (ptrace(PTRACE_OLDSETOPTIONS, pid, 0, (void *)PTRACE_O_TRACESYSGOOD) < 0) {
- printf("Failed to PTRACE_SETOPTIONS for idle thread, errno = %d\n", errno);
- exit(1);
- }
- if((ptrace(PTRACE_CONT, pid, 0, 0) < 0)){
- printf("Failed to continue idle thread, errno = %d\n", errno);
- exit(1);
- }
-
- signal(SIGSEGV, (sighandler_t) tracer_segv);
- signal(SIGUSR1, signal_usr1);
- if(debug_trace){
- printf("Tracing thread pausing to be attached\n");
- stop();
- }
- if(debug){
- if(gdb_pid != -1)
- debugger_pid = attach_debugger(pid, gdb_pid, 1);
- else debugger_pid = init_ptrace_proxy(pid, 1, debug_stop);
- if(debug_parent){
- debugger_parent = os_process_parent(debugger_pid);
- init_parent_proxy(debugger_parent);
- err = attach(debugger_parent);
- if(err){
- printf("Failed to attach debugger parent %d, "
- "errno = %d\n", debugger_parent, -err);
- debugger_parent = -1;
- }
- else {
- if(ptrace(PTRACE_SYSCALL, debugger_parent,
- 0, 0) < 0){
- printf("Failed to continue debugger "
- "parent, errno = %d\n", errno);
- debugger_parent = -1;
- }
- }
- }
- }
- set_cmdline("(tracing thread)");
- while(1){
- CATCH_EINTR(pid = waitpid(-1, &status, WUNTRACED));
- if(pid <= 0){
- if(errno != ECHILD){
- printf("wait failed - errno = %d\n", errno);
- }
- continue;
- }
- if(pid == debugger_pid){
- int cont = 0;
-
- if(WIFEXITED(status) || WIFSIGNALED(status))
- debugger_pid = -1;
- /* XXX Figure out how to deal with gdb and SMP */
- else cont = debugger_signal(status, cpu_tasks[0].pid);
- if(cont == PTRACE_SYSCALL) strace = 1;
- continue;
- }
- else if(pid == debugger_parent){
- debugger_parent_signal(status, pid);
- continue;
- }
- nsignals++;
- if(WIFEXITED(status)) ;
-#ifdef notdef
- {
- printf("Child %d exited with status %d\n", pid,
- WEXITSTATUS(status));
- }
-#endif
- else if(WIFSIGNALED(status)){
- sig = WTERMSIG(status);
- if(sig != 9){
- printf("Child %d exited with signal %d\n", pid,
- sig);
- }
- }
- else if(WIFSTOPPED(status)){
- proc_id = pid_to_processor_id(pid);
- sig = WSTOPSIG(status);
- if(proc_id == -1){
- sleeping_process_signal(pid, sig);
- continue;
- }
-
- task = cpu_tasks[proc_id].task;
- tracing = is_tracing(task);
- old_tracing = tracing;
-
- /* Assume: no syscall, when coming from user */
- if ( tracing )
- do_sigtrap(task);
-
- switch(sig){
- case SIGUSR1:
- sig = 0;
- op = do_proc_op(task, proc_id);
- switch(op){
- /*
- * This is called when entering user mode; after
- * this, we start intercepting syscalls.
- *
- * In fact, a process is started in kernel mode,
- * so with is_tracing() == 0 (and that is reset
- * when executing syscalls, since UML kernel has
- * the right to do syscalls);
- */
- case OP_TRACE_ON:
- arch_leave_kernel(task, pid);
- tracing = 1;
- break;
- case OP_REBOOT:
- case OP_HALT:
- unmap_physmem();
- kmalloc_ok = 0;
- os_kill_ptraced_process(pid, 0);
- /* Now let's reap remaining zombies */
- errno = 0;
- do {
- waitpid(-1, &status,
- WUNTRACED);
- } while (errno != ECHILD);
- return(op == OP_REBOOT);
- case OP_NONE:
- printf("Detaching pid %d\n", pid);
- detach(pid, SIGSTOP);
- continue;
- default:
- break;
- }
- /* OP_EXEC switches host processes on us,
- * we want to continue the new one.
- */
- pid = cpu_tasks[proc_id].pid;
- break;
- case (SIGTRAP + 0x80):
- if(!tracing && (debugger_pid != -1)){
- child_signal(pid, status & 0x7fff);
- continue;
- }
- tracing = 0;
- /* local_using_sysemu has been already set
- * below, since if we are here, is_tracing() on
- * the traced task was 1, i.e. the process had
- * already run through one iteration of the
- * loop which executed a OP_TRACE_ON request.*/
- do_syscall(task, pid, local_using_sysemu);
- sig = SIGUSR2;
- break;
- case SIGTRAP:
- if(!tracing && (debugger_pid != -1)){
- child_signal(pid, status);
- continue;
- }
- tracing = 0;
- break;
- case SIGPROF:
- if(tracing) sig = 0;
- break;
- case SIGCHLD:
- case SIGHUP:
- sig = 0;
- break;
- case SIGSEGV:
- case SIGIO:
- case SIGALRM:
- case SIGVTALRM:
- case SIGFPE:
- case SIGBUS:
- case SIGILL:
- case SIGWINCH:
-
- default:
- tracing = 0;
- break;
- }
- set_tracing(task, tracing);
-
- if(!tracing && old_tracing)
- arch_enter_kernel(task, pid);
-
- if(!tracing && (debugger_pid != -1) && (sig != 0) &&
- (sig != SIGALRM) && (sig != SIGVTALRM) &&
- (sig != SIGSEGV) && (sig != SIGTRAP) &&
- (sig != SIGUSR2) && (sig != SIGIO) &&
- (sig != SIGFPE)){
- child_signal(pid, status);
- continue;
- }
-
- local_using_sysemu = get_using_sysemu();
-
- if(tracing)
- cont_type = SELECT_PTRACE_OPERATION(local_using_sysemu,
- singlestepping(task));
- else if((debugger_pid != -1) && strace)
- cont_type = PTRACE_SYSCALL;
- else
- cont_type = PTRACE_CONT;
-
- if(ptrace(cont_type, pid, 0, sig) != 0){
- tracer_panic("ptrace failed to continue "
- "process - errno = %d\n",
- errno);
- }
- }
- }
- return(0);
-}
-
-static int __init uml_debug_setup(char *line, int *add)
-{
- char *next;
-
- debug = 1;
- *add = 0;
- if(*line != '=') return(0);
- line++;
-
- while(line != NULL){
- next = strchr(line, ',');
- if(next) *next++ = '\0';
-
- if(!strcmp(line, "go")) debug_stop = 0;
- else if(!strcmp(line, "parent")) debug_parent = 1;
- else printf("Unknown debug option : '%s'\n", line);
-
- line = next;
- }
- return(0);
-}
-
-__uml_setup("debug", uml_debug_setup,
-"debug\n"
-" Starts up the kernel under the control of gdb. See the \n"
-" kernel debugging tutorial and the debugging session pages\n"
-" at http://user-mode-linux.sourceforge.net/ for more information.\n\n"
-);
-
-static int __init uml_debugtrace_setup(char *line, int *add)
-{
- debug_trace = 1;
- return 0;
-}
-__uml_setup("debugtrace", uml_debugtrace_setup,
-"debugtrace\n"
-" Causes the tracing thread to pause until it is attached by a\n"
-" debugger and continued. This is mostly for debugging crashes\n"
-" early during boot, and should be pretty much obsoleted by\n"
-" the debug switch.\n\n"
-);
-
-/*
- * 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/tt/trap_user.c b/arch/um/kernel/tt/trap_user.c
deleted file mode 100644
index 3032eb5..0000000
--- a/arch/um/kernel/tt/trap_user.c
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include <stdlib.h>
-#include <errno.h>
-#include <signal.h>
-#include "sysdep/ptrace.h"
-#include "sysdep/sigcontext.h"
-#include "kern_util.h"
-#include "task.h"
-#include "tt.h"
-#include "os.h"
-
-void sig_handler_common_tt(int sig, void *sc_ptr)
-{
- struct sigcontext *sc = sc_ptr;
- struct tt_regs save_regs, *r;
- int save_errno = errno, is_user = 0;
- void (*handler)(int, union uml_pt_regs *);
-
- /* 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.
- */
- if(sig == SIGSEGV)
- change_sig(SIGSEGV, 1);
-
- r = &TASK_REGS(get_current())->tt;
- if ( sig == SIGFPE || sig == SIGSEGV ||
- sig == SIGBUS || sig == SIGILL ||
- sig == SIGTRAP ) {
- GET_FAULTINFO_FROM_SC(r->faultinfo, sc);
- }
- save_regs = *r;
- if (sc)
- is_user = user_context(SC_SP(sc));
- r->sc = sc;
- if(sig != SIGUSR2)
- r->syscall = -1;
-
- handler = sig_info[sig];
-
- /* unblock SIGALRM, SIGVTALRM, SIGIO if sig isn't IRQ signal */
- if (sig != SIGIO && sig != SIGWINCH &&
- sig != SIGVTALRM && sig != SIGALRM)
- unblock_signals();
-
- handler(sig, (union uml_pt_regs *) r);
-
- if(is_user){
- interrupt_end();
- block_signals();
- set_user_mode(NULL);
- }
- *r = save_regs;
- errno = save_errno;
-}
-
-/*
- * 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/tt/uaccess.c b/arch/um/kernel/tt/uaccess.c
deleted file mode 100644
index 1cb6072..0000000
--- a/arch/um/kernel/tt/uaccess.c
+++ /dev/null
@@ -1,73 +0,0 @@
-/*
- * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
- * Licensed under the GPL
- */
-
-#include "linux/sched.h"
-#include "asm/uaccess.h"
-
-int copy_from_user_tt(void *to, const void __user *from, int n)
-{
- if(!access_ok(VERIFY_READ, from, n))
- return(n);
-
- return(__do_copy_from_user(to, from, n, ¤t->thread.fault_addr,
- ¤t->thread.fault_catcher));
-}
-
-int copy_to_user_tt(void __user *to, const void *from, int n)
-{
- if(!access_ok(VERIFY_WRITE, to, n))
- return(n);
-
- return(__do_copy_to_user(to, from, n, ¤t->thread.fault_addr,
- ¤t->thread.fault_catcher));
-}
-
-int strncpy_from_user_tt(char *dst, const char __user *src, int count)
-{
- int n;
-
- if(!access_ok(VERIFY_READ, src, 1))
- return(-EFAULT);
-
- n = __do_strncpy_from_user(dst, src, count,
- ¤t->thread.fault_addr,
- ¤t->thread.fault_catcher);
- if(n < 0) return(-EFAULT);
- return(n);
-}
-
-int __clear_user_tt(void __user *mem, int len)
-{
- return(__do_clear_user(mem, len,
- ¤t->thread.fault_addr,
- ¤t->thread.fault_catcher));
-}
-
-int clear_user_tt(void __user *mem, int len)
-{
- if(!access_ok(VERIFY_WRITE, mem, len))
- return(len);
-
- return(__do_clear_user(mem, len, ¤t->thread.fault_addr,
- ¤t->thread.fault_catcher));
-}
-
-int strnlen_user_tt(const void __user *str, int len)
-{
- return(__do_strnlen_user(str, len,
- ¤t->thread.fault_addr,
- ¤t->thread.fault_catcher));
-}
-
-/*
- * 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/tt/uaccess_user.c b/arch/um/kernel/tt/uaccess_user.c
deleted file mode 100644
index 0e5c82c..0000000
--- a/arch/um/kernel/tt/uaccess_user.c
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk)
- * Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include <string.h>
-#include "uml_uaccess.h"
-#include "task.h"
-#include "kern_util.h"
-#include "os.h"
-#include "longjmp.h"
-
-int __do_copy_from_user(void *to, const void *from, int n,
- void **fault_addr, void **fault_catcher)
-{
- struct tt_regs save = TASK_REGS(get_current())->tt;
- unsigned long fault;
- int faulted;
-
- fault = __do_user_copy(to, from, n, fault_addr, fault_catcher,
- __do_copy, &faulted);
- TASK_REGS(get_current())->tt = save;
-
- if(!faulted)
- return 0;
- else if (fault)
- return n - (fault - (unsigned long) from);
- else
- /* In case of a general protection fault, we don't have the
- * fault address, so NULL is used instead. Pretend we didn't
- * copy anything. */
- return n;
-}
-
-static void __do_strncpy(void *dst, const void *src, int count)
-{
- strncpy(dst, src, count);
-}
-
-int __do_strncpy_from_user(char *dst, const char *src, unsigned long count,
- void **fault_addr, void **fault_catcher)
-{
- struct tt_regs save = TASK_REGS(get_current())->tt;
- unsigned long fault;
- int faulted;
-
- fault = __do_user_copy(dst, src, count, fault_addr, fault_catcher,
- __do_strncpy, &faulted);
- TASK_REGS(get_current())->tt = save;
-
- if(!faulted) return(strlen(dst));
- else return(-1);
-}
-
-static void __do_clear(void *to, const void *from, int n)
-{
- memset(to, 0, n);
-}
-
-int __do_clear_user(void *mem, unsigned long len,
- void **fault_addr, void **fault_catcher)
-{
- struct tt_regs save = TASK_REGS(get_current())->tt;
- unsigned long fault;
- int faulted;
-
- fault = __do_user_copy(mem, NULL, len, fault_addr, fault_catcher,
- __do_clear, &faulted);
- TASK_REGS(get_current())->tt = save;
-
- if(!faulted) return(0);
- else return(len - (fault - (unsigned long) mem));
-}
-
-int __do_strnlen_user(const char *str, unsigned long n,
- void **fault_addr, void **fault_catcher)
-{
- struct tt_regs save = TASK_REGS(get_current())->tt;
- int ret;
- unsigned long *faddrp = (unsigned long *)fault_addr;
- jmp_buf jbuf;
-
- *fault_catcher = &jbuf;
- if(UML_SETJMP(&jbuf) == 0)
- ret = strlen(str) + 1;
- else ret = *faddrp - (unsigned long) str;
-
- *fault_addr = NULL;
- *fault_catcher = NULL;
-
- TASK_REGS(get_current())->tt = save;
- return ret;
-}
-
-/*
- * 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/um_arch.c b/arch/um/kernel/um_arch.c
index ecc458f..aa7b067 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -38,9 +38,7 @@
#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"
@@ -132,43 +130,12 @@
/* Set in uml_ncpus_setup */
int ncpus = 1;
-#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.
- */
-static char *argv1_begin = NULL;
-static char *argv1_end = NULL;
-#endif
-
/* Set in early boot */
static int have_root __initdata = 0;
/* Set in uml_mem_setup and modified in linux_main */
long long physmem_size = 32 * 1024 * 1024;
-void set_cmdline(char *cmd)
-{
-#ifdef CONFIG_CMDLINE_ON_HOST
- char *umid, *ptr;
-
- if(CHOOSE_MODE(honeypot, 0)) return;
-
- umid = get_umid();
- if(*umid != '\0'){
- snprintf(argv1_begin,
- (argv1_end - argv1_begin) * sizeof(*ptr),
- "(%s) ", umid);
- ptr = &argv1_begin[strlen(argv1_begin)];
- }
- else ptr = argv1_begin;
-
- snprintf(ptr, (argv1_end - ptr) * sizeof(*ptr), "[%s]", cmd);
- memset(argv1_begin + strlen(argv1_begin), '\0',
- argv1_end - argv1_begin - strlen(argv1_begin));
-#endif
-}
-
static char *usage_string =
"User Mode Linux v%s\n"
" available at http://user-mode-linux.sourceforge.net/\n\n";
@@ -201,13 +168,10 @@
" 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");
+ printf("'gdb linux'");
return 0;
}
@@ -217,8 +181,6 @@
" 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)
{
@@ -236,52 +198,6 @@
);
#endif
-static int force_tt = 0;
-
-#if defined(CONFIG_MODE_TT) && defined(CONFIG_MODE_SKAS)
-#define DEFAULT_TT 0
-
-static int __init mode_tt_setup(char *line, int *add)
-{
- force_tt = 1;
- return 0;
-}
-
-#else
-#ifdef CONFIG_MODE_SKAS
-
-#define DEFAULT_TT 0
-
-static int __init mode_tt_setup(char *line, int *add)
-{
- printf("CONFIG_MODE_TT disabled - 'mode=tt' ignored\n");
- return 0;
-}
-
-#else
-#ifdef CONFIG_MODE_TT
-
-#define DEFAULT_TT 1
-
-static int __init mode_tt_setup(char *line, int *add)
-{
- printf("CONFIG_MODE_SKAS disabled - 'mode=tt' redundant\n");
- return 0;
-}
-
-#endif
-#endif
-#endif
-
-__uml_setup("mode=tt", mode_tt_setup,
-"mode=tt\n"
-" When both CONFIG_MODE_TT and CONFIG_MODE_SKAS are enabled, this option\n"
-" forces UML to run in tt (tracing thread) mode. It is not the default\n"
-" because it's slower and less secure than skas mode.\n\n"
-);
-
-int mode_tt = DEFAULT_TT;
-
static int __init Usage(char *line, int *add)
{
const char **p;
@@ -357,29 +273,13 @@
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) {
- /*Since CONFIG_MODE_TT is #undef'ed, force_tt cannot be 1. So,
- * can_do_skas() returned 0, and the message is correct. */
- printf("Support for TT mode is disabled, and no SKAS support is present on the host.\n");
- 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)
+ can_do_skas();
+
+ if (proc_mm && ptrace_faultinfo)
mode = "SKAS3";
else
mode = "SKAS0";
-#endif
printf("UML running in %s mode\n", mode);
@@ -411,11 +311,6 @@
setup_machinename(init_utsname()->machine);
-#ifdef CONFIG_CMDLINE_ON_HOST
- argv1_begin = argv[1];
- argv1_end = &argv[1][strlen(argv[1])];
-#endif
-
highmem = 0;
iomem_size = (iomem_size + PAGE_SIZE - 1) & PAGE_MASK;
max_physmem = get_kmem_end() - uml_physmem - iomem_size - MIN_VMALLOC;
diff --git a/arch/um/kernel/uml.lds.S b/arch/um/kernel/uml.lds.S
index 81acdc2..13df191 100644
--- a/arch/um/kernel/uml.lds.S
+++ b/arch/um/kernel/uml.lds.S
@@ -18,13 +18,6 @@
. = START + SIZEOF_HEADERS;
-#ifdef MODE_TT
- .remap_data : { UNMAP_PATH (.data .bss) }
- .remap : { UNMAP_PATH (.text) }
-
- . = ALIGN(4096); /* Init code and data */
-#endif
-
_text = .;
_stext = .;
__init_begin = .;