new file mode 100644
@@ -0,0 +1,4 @@
+include $(objtree)/include/config/auto.conf
+
+liblinux-$(CONFIG_UMMODE_LIB) += utils.o
+liblinux-$(CONFIG_UMMODE_LIB) += jmp_buf.o
new file mode 100644
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <setjmp.h>
+#include <lkl_host.h>
+
+void jmp_buf_set(struct lkl_jmp_buf *jmpb, void (*f)(void))
+{
+ if (!setjmp(*((jmp_buf *)jmpb->buf)))
+ f();
+}
+
+void jmp_buf_longjmp(struct lkl_jmp_buf *jmpb, int val)
+{
+ longjmp(*((jmp_buf *)jmpb->buf), val);
+}
new file mode 100644
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LKL_LIB_JMP_BUF_H
+#define _LKL_LIB_JMP_BUF_H
+
+void jmp_buf_set(struct lkl_jmp_buf *jmpb, void (*f)(void));
+void jmp_buf_longjmp(struct lkl_jmp_buf *jmpb, int val);
+
+#endif
new file mode 100644
@@ -0,0 +1,210 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <lkl_host.h>
+
+static const char * const lkl_err_strings[] = {
+ "Success",
+ "Operation not permitted",
+ "No such file or directory",
+ "No such process",
+ "Interrupted system call",
+ "I/O error",
+ "No such device or address",
+ "Argument list too long",
+ "Exec format error",
+ "Bad file number",
+ "No child processes",
+ "Try again",
+ "Out of memory",
+ "Permission denied",
+ "Bad address",
+ "Block device required",
+ "Device or resource busy",
+ "File exists",
+ "Cross-device link",
+ "No such device",
+ "Not a directory",
+ "Is a directory",
+ "Invalid argument",
+ "File table overflow",
+ "Too many open files",
+ "Not a typewriter",
+ "Text file busy",
+ "File too large",
+ "No space left on device",
+ "Illegal seek",
+ "Read-only file system",
+ "Too many links",
+ "Broken pipe",
+ "Math argument out of domain of func",
+ "Math result not representable",
+ "Resource deadlock would occur",
+ "File name too long",
+ "No record locks available",
+ "Invalid system call number",
+ "Directory not empty",
+ "Too many symbolic links encountered",
+ "Bad error code", /* EWOULDBLOCK is EAGAIN */
+ "No message of desired type",
+ "Identifier removed",
+ "Channel number out of range",
+ "Level 2 not synchronized",
+ "Level 3 halted",
+ "Level 3 reset",
+ "Link number out of range",
+ "Protocol driver not attached",
+ "No CSI structure available",
+ "Level 2 halted",
+ "Invalid exchange",
+ "Invalid request descriptor",
+ "Exchange full",
+ "No anode",
+ "Invalid request code",
+ "Invalid slot",
+ "Bad error code", /* EDEADLOCK is EDEADLK */
+ "Bad font file format",
+ "Device not a stream",
+ "No data available",
+ "Timer expired",
+ "Out of streams resources",
+ "Machine is not on the network",
+ "Package not installed",
+ "Object is remote",
+ "Link has been severed",
+ "Advertise error",
+ "Srmount error",
+ "Communication error on send",
+ "Protocol error",
+ "Multihop attempted",
+ "RFS specific error",
+ "Not a data message",
+ "Value too large for defined data type",
+ "Name not unique on network",
+ "File descriptor in bad state",
+ "Remote address changed",
+ "Can not access a needed shared library",
+ "Accessing a corrupted shared library",
+ ".lib section in a.out corrupted",
+ "Attempting to link in too many shared libraries",
+ "Cannot exec a shared library directly",
+ "Illegal byte sequence",
+ "Interrupted system call should be restarted",
+ "Streams pipe error",
+ "Too many users",
+ "Socket operation on non-socket",
+ "Destination address required",
+ "Message too long",
+ "Protocol wrong type for socket",
+ "Protocol not available",
+ "Protocol not supported",
+ "Socket type not supported",
+ "Operation not supported on transport endpoint",
+ "Protocol family not supported",
+ "Address family not supported by protocol",
+ "Address already in use",
+ "Cannot assign requested address",
+ "Network is down",
+ "Network is unreachable",
+ "Network dropped connection because of reset",
+ "Software caused connection abort",
+ "Connection reset by peer",
+ "No buffer space available",
+ "Transport endpoint is already connected",
+ "Transport endpoint is not connected",
+ "Cannot send after transport endpoint shutdown",
+ "Too many references: cannot splice",
+ "Connection timed out",
+ "Connection refused",
+ "Host is down",
+ "No route to host",
+ "Operation already in progress",
+ "Operation now in progress",
+ "Stale file handle",
+ "Structure needs cleaning",
+ "Not a XENIX named type file",
+ "No XENIX semaphores available",
+ "Is a named type file",
+ "Remote I/O error",
+ "Quota exceeded",
+ "No medium found",
+ "Wrong medium type",
+ "Operation Canceled",
+ "Required key not available",
+ "Key has expired",
+ "Key has been revoked",
+ "Key was rejected by service",
+ "Owner died",
+ "State not recoverable",
+ "Operation not possible due to RF-kill",
+ "Memory page has hardware error",
+};
+
+const char *lkl_strerror(int err)
+{
+ if (err < 0)
+ err = -err;
+
+ if ((size_t)err >= sizeof(lkl_err_strings) / sizeof(const char *))
+ return "Bad error code";
+
+ return lkl_err_strings[err];
+}
+
+void lkl_perror(char *msg, int err)
+{
+ const char *err_msg = lkl_strerror(err);
+ /* We need to use 'real' printf because lkl_host_ops.print can
+ * be turned off when debugging is off.
+ */
+ lkl_printf("%s: %s\n", msg, err_msg);
+}
+
+static int lkl_vprintf(const char *fmt, va_list args)
+{
+ int n;
+ char *buffer;
+ va_list copy;
+
+ if (!lkl_host_ops.print)
+ return 0;
+
+ va_copy(copy, args);
+ n = vsnprintf(NULL, 0, fmt, copy);
+ va_end(copy);
+
+ buffer = lkl_host_ops.mem_alloc(n + 1);
+ if (!buffer)
+ return (-1);
+
+ vsnprintf(buffer, n + 1, fmt, args);
+
+ lkl_host_ops.print(buffer, n);
+ lkl_host_ops.mem_free(buffer);
+
+ return n;
+}
+
+int lkl_printf(const char *fmt, ...)
+{
+ int n;
+ va_list args;
+
+ va_start(args, fmt);
+ n = lkl_vprintf(fmt, args);
+ va_end(args);
+
+ return n;
+}
+
+void lkl_bug(const char *fmt, ...)
+{
+ va_list args;
+
+ va_start(args, fmt);
+ lkl_vprintf(fmt, args);
+ va_end(args);
+
+ lkl_host_ops.panic();
+}
Add basic utility functions for getting a string from a kernel error code and a fprintf like function that uses the host print operation. The latter is useful for informing the user about errors that occur in the host library. Signed-off-by: Hajime Tazaki <thehajime@gmail.com> --- tools/um/lib/Build | 4 + tools/um/lib/jmp_buf.c | 14 +++ tools/um/lib/jmp_buf.h | 8 ++ tools/um/lib/utils.c | 210 +++++++++++++++++++++++++++++++++++++++++ 4 files changed, 236 insertions(+) create mode 100644 tools/um/lib/Build create mode 100644 tools/um/lib/jmp_buf.c create mode 100644 tools/um/lib/jmp_buf.h create mode 100644 tools/um/lib/utils.c