lib: libc: arcmwdt: Fix userspace write() and read() mishap (86b8cf1f) · Commits · Wenxi XU / zephyr

The newlib `write()` and `read()` functions must call the `z_zephyr_write_stdout()` and `z_zephyr_read_stdin()` syscall functions in order to function properly in a user mode context. The existing incorrect implementation was copied off the newlib hooks implementation, which was corrected in the previous commit. Signed-off-by:

Stephanos Ioannidis <root@stephanos.io>

lib/libc/arcmwdt/libc-hooks.c

+3 −3

Original line number	Diff line number	Diff line
		@@ -27,7 +27,7 @@ void __stdout_hook_install(int (*hook)(int))
		_stdout_hook = hook;
		}

		int z_impl_zephyr_write_stdout(const void *buffer, int nbytes)
		int z_impl_z_zephyr_write_stdout(const void *buffer, int nbytes)
		{
		const char *buf = buffer;
		int i;
		@@ -45,7 +45,7 @@ int z_impl_zephyr_write_stdout(const void *buffer, int nbytes)
		static inline int z_vrfy_z_zephyr_write_stdout(const void *buf, int nbytes)
		{
		Z_OOPS(Z_SYSCALL_MEMORY_READ(buf, nbytes));
		return z_impl_zephyr_write_stdout(buf, nbytes);
		return z_impl_z_zephyr_write_stdout(buf, nbytes);
		}
		#include <syscalls/z_zephyr_write_stdout_mrsh.c>
		#endif
		@@ -55,7 +55,7 @@ int _write(int fd, const char *buf, unsigned int nbytes)
		{
		ARG_UNUSED(fd);

		return z_impl_zephyr_write_stdout(buf, nbytes);
		return z_zephyr_write_stdout(buf, nbytes);
		}
		#endif

Admin message