forked from mirror/qemu
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
/*
|
|
* Hosted file support for semihosting syscalls.
|
|
*
|
|
* Copyright (c) 2005, 2007 CodeSourcery.
|
|
* Copyright (c) 2019 Linaro
|
|
* Copyright © 2020 by Keith Packard <keithp@keithp.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*/
|
|
|
|
#ifndef SEMIHOSTING_GUESTFD_H
|
|
#define SEMIHOSTING_GUESTFD_H
|
|
|
|
typedef enum GuestFDType {
|
|
GuestFDUnused = 0,
|
|
GuestFDHost,
|
|
GuestFDGDB,
|
|
GuestFDStatic,
|
|
GuestFDConsole,
|
|
} GuestFDType;
|
|
|
|
/*
|
|
* Guest file descriptors are integer indexes into an array of
|
|
* these structures (we will dynamically resize as necessary).
|
|
*/
|
|
typedef struct GuestFD {
|
|
GuestFDType type;
|
|
union {
|
|
int hostfd;
|
|
struct {
|
|
const uint8_t *data;
|
|
size_t len;
|
|
size_t off;
|
|
} staticfile;
|
|
};
|
|
} GuestFD;
|
|
|
|
/*
|
|
* For ARM semihosting, we have a separate structure for routing
|
|
* data for the console which is outside the guest fd address space.
|
|
*/
|
|
extern GuestFD console_in_gf;
|
|
extern GuestFD console_out_gf;
|
|
|
|
/**
|
|
* alloc_guestfd:
|
|
*
|
|
* Allocate an unused GuestFD index. The associated guestfd index
|
|
* will still be GuestFDUnused until it is initialized.
|
|
*/
|
|
int alloc_guestfd(void);
|
|
|
|
/**
|
|
* dealloc_guestfd:
|
|
* @guestfd: GuestFD index
|
|
*
|
|
* Deallocate a GuestFD index. The associated GuestFD structure
|
|
* will be recycled for a subsequent allocation.
|
|
*/
|
|
void dealloc_guestfd(int guestfd);
|
|
|
|
/**
|
|
* get_guestfd:
|
|
* @guestfd: GuestFD index
|
|
*
|
|
* Return the GuestFD structure associated with an initialized @guestfd,
|
|
* or NULL if it has not been allocated, or hasn't been initialized.
|
|
*/
|
|
GuestFD *get_guestfd(int guestfd);
|
|
|
|
/**
|
|
* associate_guestfd:
|
|
* @guestfd: GuestFD index
|
|
* @hostfd: host file descriptor
|
|
*
|
|
* Initialize the GuestFD for @guestfd to GuestFDHost using @hostfd.
|
|
*/
|
|
void associate_guestfd(int guestfd, int hostfd);
|
|
|
|
/**
|
|
* staticfile_guestfd:
|
|
* @guestfd: GuestFD index
|
|
* @data: data to be read
|
|
* @len: length of @data
|
|
*
|
|
* Initialize the GuestFD for @guestfd to GuestFDStatic.
|
|
* The @len bytes at @data will be returned to the guest on reads.
|
|
*/
|
|
void staticfile_guestfd(int guestfd, const uint8_t *data, size_t len);
|
|
|
|
#endif /* SEMIHOSTING_GUESTFD_H */
|