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target/xtensa: support output to chardev console

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In semihosting mode QEMU allows guest to read and write host file
descriptors directly, including descriptors 0..2, a.k.a. stdin, stdout
and stderr. Sometimes it's desirable to have semihosting console
controlled by -serial option, e.g. to connect it to network.

Add semihosting console to xtensa-semi.c, open it in the 'sim' machine
in the presence of -serial option and direct stdout and stderr to it
when it's present.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2017-05-12 11:09:14 -07:00
parent 347ec03093
commit 8128b3e079
3 changed files with 57 additions and 14 deletions
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target/xtensa/cpu.h
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@ -483,6 +483,7 @@ void xtensa_translate_init(void);
void xtensa_breakpoint_handler(CPUState *cs);
void xtensa_finalize_config(XtensaConfig *config);
void xtensa_register_core(XtensaConfigList *node);
void xtensa_sim_open_console(Chardev *chr);
void check_interrupts(CPUXtensaState *s);
void xtensa_irq_init(CPUXtensaState *env);
void *xtensa_get_extint(CPUXtensaState *env, unsigned extint);