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/*
* Semihosting Console
*
* Copyright (c) 2019 Linaro Ltd
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef SEMIHOST_CONSOLE_H
#define SEMIHOST_CONSOLE_H
#include "cpu.h"
/**
* qemu_semihosting_console_outs:
* @env: CPUArchState
* @s: host address of null terminated guest string
*
* Send a null terminated guest string to the debug console. This may
* be the remote gdb session if a softmmu guest is currently being
* debugged.
*
* Returns: number of bytes written.
*/
int qemu_semihosting_console_outs(CPUArchState *env, target_ulong s);
/**
* qemu_semihosting_console_read:
* @cs: CPUState
* @buf: host buffer
* @len: buffer size
*
* Receive at least one character from debug console. As this call may
* block if no data is available we suspend the CPU and will re-execute the
* instruction when data is there. Therefore two conditions must be met:
*
* - CPUState is synchronized before calling this function
* - pc is only updated once the character is successfully returned
*
* Returns: number of characters read, OR cpu_loop_exit!
*/
int qemu_semihosting_console_read(CPUState *cs, void *buf, int len);
/**
* qemu_semihosting_console_write:
* @buf: host buffer
* @len: buffer size
*
* Write len bytes from buf to the debug console.
*
* Returns: number of bytes written -- this should only ever be short
* on some sort of i/o error.
*/
int qemu_semihosting_console_write(void *buf, int len);
/**
* qemu_semihosting_log_out:
* @s: pointer to string
* @len: length of string
*
* Send a string to the debug output. Unlike console_out these strings
* can't be sent to a remote gdb instance as they don't exist in guest
* memory.
*
* Returns: number of bytes written
*/
int qemu_semihosting_log_out(const char *s, int len);
#endif /* SEMIHOST_CONSOLE_H */
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