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target/arm: use the common interface for WRITE0/WRITEC in arm-semi

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Now we have a common semihosting console interface use that for our
string output. However ARM is currently unique in also supporting
semihosting for linux-user so we need to replicate the API in
linux-user. If other architectures gain this support we can move the
file later.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Alex Bennée 2019-05-14 11:07:15 +01:00
parent 4cb28db99b
commit 0dc077212f
3 changed files with 30 additions and 25 deletions
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2
linux-user/Makefile.objs
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@ -6,4 +6,6 @@ obj-y = main.o syscall.o strace.o mmap.o signal.o \
obj-$(TARGET_HAS_BFLT) += flatload.o
obj-$(TARGET_I386) += vm86.o
obj-$(TARGET_ARM) += arm/nwfpe/
obj-$(TARGET_ARM) += arm/semihost.o
obj-$(TARGET_AARCH64) += arm/semihost.o
obj-$(TARGET_M68K) += m68k-sim.o

24
linux-user/arm/semihost.c Normal file
View file

@ -0,0 +1,24 @@
/*
* ARM Semihosting Console Support
*
* Copyright (c) 2019 Linaro Ltd
*
* Currently ARM is unique in having support for semihosting support
* in linux-user. So for now we implement the common console API but
* just for arm linux-user.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "hw/semihosting/console.h"
#include "qemu.h"
int qemu_semihosting_console_out(CPUArchState *env, target_ulong addr, int len)
{
void *s = lock_user_string(addr);
len = write(STDERR_FILENO, s, len ? len : strlen(s));
unlock_user(s, addr, 0);
return len;
}