mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-11-05 20:35:44 +00:00
2d010c2719
This function has been replaced by *_write. Reviewed-by: Luc Michel <lmichel@kalray.eu> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/*
|
|
* ARM Compatible Semihosting Console Support.
|
|
*
|
|
* Copyright (c) 2019 Linaro Ltd
|
|
*
|
|
* Currently ARM and RISC-V are unique in having support for
|
|
* semihosting support in linux-user. So for now we implement the
|
|
* common console API but just for arm and risc-v linux-user.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "semihosting/console.h"
|
|
#include "qemu.h"
|
|
#include "user-internals.h"
|
|
#include <termios.h>
|
|
|
|
/*
|
|
* For linux-user we can safely block. However as we want to return as
|
|
* soon as a character is read we need to tweak the termio to disable
|
|
* line buffering. We restore the old mode afterwards in case the
|
|
* program is expecting more normal behaviour. This is slow but
|
|
* nothing using semihosting console reading is expecting to be fast.
|
|
*/
|
|
int qemu_semihosting_console_read(CPUState *cs, void *buf, int len)
|
|
{
|
|
int ret;
|
|
struct termios old_tio, new_tio;
|
|
|
|
/* Disable line-buffering and echo */
|
|
tcgetattr(STDIN_FILENO, &old_tio);
|
|
new_tio = old_tio;
|
|
new_tio.c_lflag &= (~ICANON & ~ECHO);
|
|
new_tio.c_cc[VMIN] = 1;
|
|
new_tio.c_cc[VTIME] = 0;
|
|
tcsetattr(STDIN_FILENO, TCSANOW, &new_tio);
|
|
|
|
ret = fread(buf, 1, len, stdin);
|
|
|
|
/* restore config */
|
|
tcsetattr(STDIN_FILENO, TCSANOW, &old_tio);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int qemu_semihosting_console_write(void *buf, int len)
|
|
{
|
|
return fwrite(buf, 1, len, stderr);
|
|
}
|