diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2022-07-25 15:05:14 +0100 |
|---|---|---|
| committer | Alex Bennée <alex.bennee@linaro.org> | 2022-07-29 09:48:01 +0100 |
| commit | 45704e89047fc0a151c5909f006d8757140f23d6 (patch) | |
| tree | 18a1799ade53c5fbc89d73e7c412019f9833a9a1 /semihosting/syscalls.c | |
| parent | aed04e6357fa10735c43574ea67a9551580d6e82 (diff) | |
semihosting: Don't copy buffer after console_write()
The console_write() semihosting function outputs guest data from a
buffer; it doesn't update that buffer. It therefore doesn't need to
pass a length value to unlock_user(), but can pass 0, meaning "do not
copy any data back to the guest memory".
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220719121110.225657-3-peter.maydell@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20220725140520.515340-8-alex.bennee@linaro.org>
Diffstat (limited to 'semihosting/syscalls.c')
| -rw-r--r-- | semihosting/syscalls.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/semihosting/syscalls.c b/semihosting/syscalls.c index 4847f66c02..508a0ad88c 100644 --- a/semihosting/syscalls.c +++ b/semihosting/syscalls.c @@ -627,7 +627,7 @@ static void console_write(CPUState *cs, gdb_syscall_complete_cb complete, } ret = qemu_semihosting_console_write(ptr, len); complete(cs, ret ? ret : -1, ret ? 0 : EIO); - unlock_user(ptr, buf, ret); + unlock_user(ptr, buf, 0); } static void console_fstat(CPUState *cs, gdb_syscall_complete_cb complete, |