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List:       qemu-riscv
Subject:    [PATCH 8/8] semihosting: Implement SYS_ISERROR
From:       Keith Packard <keithp () keithp ! com>
Date:       2020-11-25 21:36:17
Message-ID: 20201125213617.2496935-9-keithp () keithp ! com
[Download RAW message or body]

Part of Semihosting for AArch32 and AArch64 Release 2.0

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 hw/semihosting/common-semi.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hw/semihosting/common-semi.c b/hw/semihosting/common-semi.c
index 9a04d98e4e..fda0e714ef 100644
--- a/hw/semihosting/common-semi.c
+++ b/hw/semihosting/common-semi.c
@@ -55,6 +55,7 @@
 #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
@@ -962,6 +963,9 @@ 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);
 
-- 
2.29.2



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