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semihosting: Implement SYS_ISERROR

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Part of Semihosting for AArch32 and AArch64 Release 2.0

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210107170717.2098982-10-keithp@keithp.com>
Message-Id: <20210108224256.2321-21-alex.bennee@linaro.org>
This commit is contained in:
Keith Packard 2021-01-08 22:42:56 +00:00 committed by Alex Bennée
parent 27e3b109d1
commit 767ba049b8
1 changed files with 4 additions and 0 deletions
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4
hw/semihosting/arm-compat-semi.c
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@ -59,6 +59,7 @@
#define TARGET_SYS_WRITE 0x05
#define TARGET_SYS_READ 0x06
#define TARGET_SYS_READC 0x07
#define TARGET_SYS_ISERROR 0x08
#define TARGET_SYS_ISTTY 0x09
#define TARGET_SYS_SEEK 0x0a
#define TARGET_SYS_FLEN 0x0c
@ -967,6 +968,9 @@ target_ulong do_common_semihosting(CPUState *cs)
return guestfd_fns[gf->type].readfn(cs, gf, arg1, len);
case TARGET_SYS_READC:
return qemu_semihosting_console_inc(cs->env_ptr);
case TARGET_SYS_ISERROR:
GET_ARG(0);
return (target_long) arg0 < 0 ? 1 : 0;
case TARGET_SYS_ISTTY:
GET_ARG(0);