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[PATCH v3 08/49] semihosting: Inline set_swi_errno into common_semi_cb
From: |
Richard Henderson |
Subject: |
[PATCH v3 08/49] semihosting: Inline set_swi_errno into common_semi_cb |
Date: |
Fri, 20 May 2022 17:03:19 -0700 |
Do not store 'err' into errno only to read it back immediately.
Use 'ret' for the return value, not 'reg0'.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
semihosting/arm-compat-semi.c | 19 ++++++++++---------
1 file changed, 10 insertions(+), 9 deletions(-)
diff --git a/semihosting/arm-compat-semi.c b/semihosting/arm-compat-semi.c
index c6bfd4d1ba..b00ed2c6d1 100644
--- a/semihosting/arm-compat-semi.c
+++ b/semihosting/arm-compat-semi.c
@@ -290,28 +290,29 @@ static target_ulong common_semi_syscall_len;
static void common_semi_cb(CPUState *cs, target_ulong ret, target_ulong err)
{
- target_ulong reg0 = common_semi_arg(cs, 0);
-
if (ret == (target_ulong)-1) {
- errno = err;
- set_swi_errno(cs, -1);
- reg0 = ret;
+#ifdef CONFIG_USER_ONLY
+ TaskState *ts = cs->opaque;
+ ts->swi_errno = err;
+#else
+ syscall_err = err;
+#endif
} else {
/* Fixup syscalls that use nonstardard return conventions. */
+ target_ulong reg0 = common_semi_arg(cs, 0);
switch (reg0) {
case TARGET_SYS_WRITE:
case TARGET_SYS_READ:
- reg0 = common_semi_syscall_len - ret;
+ ret = common_semi_syscall_len - ret;
break;
case TARGET_SYS_SEEK:
- reg0 = 0;
+ ret = 0;
break;
default:
- reg0 = ret;
break;
}
}
- common_semi_set_ret(cs, reg0);
+ common_semi_set_ret(cs, ret);
}
static target_ulong common_semi_flen_buf(CPUState *cs)
--
2.34.1
[PATCH v3 05/49] semihosting: Add target_strlen for softmmu-uaccess.h, Richard Henderson, 2022/05/20