arch/um/include/shared/as-layout.h

Source file repositories/reference/linux-study-clean/arch/um/include/shared/as-layout.h

File Facts

System
Linux kernel
Corpus path
arch/um/include/shared/as-layout.h
Extension
.h
Size
1485 bytes
Lines
58
Domain
Architecture Layer
Bucket
arch/um
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#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.
 */
#define STUB_START stub_start
#define STUB_CODE STUB_START
#define STUB_DATA (STUB_CODE + UM_KERN_PAGE_SIZE)
#define STUB_DATA_PAGES 2
#define STUB_SIZE ((1 + STUB_DATA_PAGES) * UM_KERN_PAGE_SIZE)
#define STUB_END (STUB_START + STUB_SIZE)

#ifndef __ASSEMBLER__

#include <sysdep/ptrace.h>

struct task_struct;
extern struct task_struct *cpu_tasks[];

extern unsigned long long physmem_size;

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 brk_start;

extern unsigned long stub_start;

extern int linux_main(int argc, char **argv, char **envp);
extern void uml_finishsetup(void);

struct siginfo;
extern void (*sig_info[])(int, struct siginfo *si, struct uml_pt_regs *, void *);

#endif

#endif

Annotation

Implementation Notes