2 * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
9 #include "uml-config.h"
10 #include "kern_constants.h"
13 * Stolen from linux/const.h, which can't be directly included since
14 * this is used in userspace code, which has no access to the kernel
15 * headers. Changed to be suitable for adding casts to the start,
16 * rather than "UL" to the end.
19 /* Some constant macros are used in both assembler and
20 * C code. Therefore we cannot annotate them always with
21 * 'UL' and other type specifiers unilaterally. We
22 * use the following macros to deal with this.
28 #define __AC(X, Y) (X (Y))
29 #define _AC(X, Y) __AC(X, Y)
33 * The "- 1"'s are to avoid gcc complaining about integer overflows
34 * and unrepresentable decimal constants. With 3-level page tables,
35 * TASK_SIZE is 0x80000000, which gets turned into its signed decimal
36 * equivalent in asm-offsets.s. gcc then complains about that being
37 * unsigned only in C90. To avoid that, UM_TASK_SIZE is defined as
38 * TASK_SIZE - 1. To compensate, we need to add the 1 back here.
39 * However, adding it back to UM_TASK_SIZE produces more gcc
40 * complaints. So, I adjust the thing being subtracted from
41 * UM_TASK_SIZE instead. Bah.
43 #define STUB_CODE _AC((unsigned long), \
44 UM_TASK_SIZE - (2 * UM_KERN_PAGE_SIZE - 1))
45 #define STUB_DATA _AC((unsigned long), UM_TASK_SIZE - (UM_KERN_PAGE_SIZE - 1))
46 #define STUB_START _AC(, STUB_CODE)
50 #include "sysdep/ptrace.h"
57 extern struct cpu_task cpu_tasks[];
59 extern unsigned long low_physmem;
60 extern unsigned long high_physmem;
61 extern unsigned long uml_physmem;
62 extern unsigned long uml_reserved;
63 extern unsigned long end_vm;
64 extern unsigned long start_vm;
65 extern unsigned long long highmem;
67 extern unsigned long _stext, _etext, _sdata, _edata, __bss_start, _end;
68 extern unsigned long _unprotected_end;
69 extern unsigned long brk_start;
71 extern int linux_main(int argc, char **argv);
73 extern void (*sig_info[])(int, struct uml_pt_regs *);