mirror of
https://github.com/torvalds/linux.git
synced 2024-11-15 08:31:55 +00:00
33bbc30654
atomic_notifier_chain_register() and uml_postsetup() do call kernel code that rely on the "current" kernel macro and a valid task_struct resp. thread_info struct. Give those functions a valid stack by moving uml_postsetup() in the init_thread stack. This moves enables a panic() call in this early code to generate a valid stacktrace, instead of crashing. E.g. when an UML kernel is started with an initrd but too few physical memory the panic() call get's actually processed. Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: Richard Weinberger <richard@nod.at>
67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
/*
|
|
* Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#ifndef __START_H__
|
|
#define __START_H__
|
|
|
|
#include <generated/asm-offsets.h>
|
|
|
|
/*
|
|
* Stolen from linux/const.h, which can't be directly included since
|
|
* this is used in userspace code, which has no access to the kernel
|
|
* headers. Changed to be suitable for adding casts to the start,
|
|
* rather than "UL" to the end.
|
|
*/
|
|
|
|
/* Some constant macros are used in both assembler and
|
|
* C code. Therefore we cannot annotate them always with
|
|
* 'UL' and other type specifiers unilaterally. We
|
|
* use the following macros to deal with this.
|
|
*/
|
|
|
|
#ifdef __ASSEMBLY__
|
|
#define _UML_AC(X, Y) (Y)
|
|
#else
|
|
#define __UML_AC(X, Y) (X(Y))
|
|
#define _UML_AC(X, Y) __UML_AC(X, Y)
|
|
#endif
|
|
|
|
#define STUB_START _UML_AC(, 0x100000)
|
|
#define STUB_CODE _UML_AC((unsigned long), STUB_START)
|
|
#define STUB_DATA _UML_AC((unsigned long), STUB_CODE + UM_KERN_PAGE_SIZE)
|
|
#define STUB_END _UML_AC((unsigned long), STUB_DATA + UM_KERN_PAGE_SIZE)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <sysdep/ptrace.h>
|
|
|
|
struct cpu_task {
|
|
int pid;
|
|
void *task;
|
|
};
|
|
|
|
extern struct cpu_task cpu_tasks[];
|
|
|
|
extern unsigned long high_physmem;
|
|
extern unsigned long uml_physmem;
|
|
extern unsigned long uml_reserved;
|
|
extern unsigned long end_vm;
|
|
extern unsigned long start_vm;
|
|
extern unsigned long long highmem;
|
|
|
|
extern unsigned long brk_start;
|
|
|
|
extern unsigned long host_task_size;
|
|
|
|
extern int linux_main(int argc, char **argv);
|
|
extern void uml_finishsetup(void);
|
|
|
|
struct siginfo;
|
|
extern void (*sig_info[])(int, struct siginfo *si, struct uml_pt_regs *);
|
|
|
|
#endif
|
|
|
|
#endif
|