From 465a06dfdc6c5d4af377dac7b9d71845cb0dc034 Mon Sep 17 00:00:00 2001
From: Spencer Oliver <ntfreak@users.sourceforge.net>
Date: Wed, 27 Jan 2010 21:20:18 +0000
Subject: ARM semihosting: fix writing to stdout
SYS_FLEN would be called before a write on a descriptor to check its size.
Currently lseek would fail with -1 when given the stdout/stderr descriptor.
Changing to use fstat seems to be the standard way of handling this.
Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
---
src/target/arm_semihosting.c | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)
(limited to 'src/target')
diff --git a/src/target/arm_semihosting.c b/src/target/arm_semihosting.c
index f4244c84..1d0acd63 100644
--- a/src/target/arm_semihosting.c
+++ b/src/target/arm_semihosting.c
@@ -230,18 +230,14 @@ static int do_semihosting(struct target *target)
return retval;
else {
int fd = target_buffer_get_u32(target, params+0);
- off_t cur = lseek(fd, 0, SEEK_CUR);
- if (cur == (off_t)-1) {
+ struct stat buf;
+ result = fstat(fd, &buf);
+ if (result == -1) {
armv4_5->semihosting_errno = errno;
result = -1;
break;
}
- result = lseek(fd, 0, SEEK_END);
- armv4_5->semihosting_errno = errno;
- if (lseek(fd, cur, SEEK_SET) == (off_t)-1) {
- armv4_5->semihosting_errno = errno;
- result = -1;
- }
+ result = buf.st_size;
}
break;
--
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