diff --git a/libc/kernel/uapi/linux/synclink.h b/libc/kernel/uapi/linux/synclink.h
new file mode 100644
index 0000000..7ff805d
--- /dev/null
+++ b/libc/kernel/uapi/linux/synclink.h
@@ -0,0 +1,301 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _UAPI_SYNCLINK_H_
+#define _UAPI_SYNCLINK_H_
+#define SYNCLINK_H_VERSION 3.6
+#include <linux/types.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define BIT0 0x0001
+#define BIT1 0x0002
+#define BIT2 0x0004
+#define BIT3 0x0008
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define BIT4 0x0010
+#define BIT5 0x0020
+#define BIT6 0x0040
+#define BIT7 0x0080
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define BIT8 0x0100
+#define BIT9 0x0200
+#define BIT10 0x0400
+#define BIT11 0x0800
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define BIT12 0x1000
+#define BIT13 0x2000
+#define BIT14 0x4000
+#define BIT15 0x8000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define BIT16 0x00010000
+#define BIT17 0x00020000
+#define BIT18 0x00040000
+#define BIT19 0x00080000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define BIT20 0x00100000
+#define BIT21 0x00200000
+#define BIT22 0x00400000
+#define BIT23 0x00800000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define BIT24 0x01000000
+#define BIT25 0x02000000
+#define BIT26 0x04000000
+#define BIT27 0x08000000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define BIT28 0x10000000
+#define BIT29 0x20000000
+#define BIT30 0x40000000
+#define BIT31 0x80000000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HDLC_MAX_FRAME_SIZE 65535
+#define MAX_ASYNC_TRANSMIT 4096
+#define MAX_ASYNC_BUFFER_SIZE 4096
+#define ASYNC_PARITY_NONE 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ASYNC_PARITY_EVEN 1
+#define ASYNC_PARITY_ODD 2
+#define ASYNC_PARITY_SPACE 3
+#define HDLC_FLAG_UNDERRUN_ABORT7 0x0000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HDLC_FLAG_UNDERRUN_ABORT15 0x0001
+#define HDLC_FLAG_UNDERRUN_FLAG 0x0002
+#define HDLC_FLAG_UNDERRUN_CRC 0x0004
+#define HDLC_FLAG_SHARE_ZERO 0x0010
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HDLC_FLAG_AUTO_CTS 0x0020
+#define HDLC_FLAG_AUTO_DCD 0x0040
+#define HDLC_FLAG_AUTO_RTS 0x0080
+#define HDLC_FLAG_RXC_DPLL 0x0100
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HDLC_FLAG_RXC_BRG 0x0200
+#define HDLC_FLAG_RXC_TXCPIN 0x8000
+#define HDLC_FLAG_RXC_RXCPIN 0x0000
+#define HDLC_FLAG_TXC_DPLL 0x0400
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HDLC_FLAG_TXC_BRG 0x0800
+#define HDLC_FLAG_TXC_TXCPIN 0x0000
+#define HDLC_FLAG_TXC_RXCPIN 0x0008
+#define HDLC_FLAG_DPLL_DIV8 0x1000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HDLC_FLAG_DPLL_DIV16 0x2000
+#define HDLC_FLAG_DPLL_DIV32 0x0000
+#define HDLC_FLAG_HDLC_LOOPMODE 0x4000
+#define HDLC_CRC_NONE 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HDLC_CRC_16_CCITT 1
+#define HDLC_CRC_32_CCITT 2
+#define HDLC_CRC_MASK 0x00ff
+#define HDLC_CRC_RETURN_EX 0x8000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define RX_OK 0
+#define RX_CRC_ERROR 1
+#define HDLC_TXIDLE_FLAGS 0
+#define HDLC_TXIDLE_ALT_ZEROS_ONES 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HDLC_TXIDLE_ZEROS 2
+#define HDLC_TXIDLE_ONES 3
+#define HDLC_TXIDLE_ALT_MARK_SPACE 4
+#define HDLC_TXIDLE_SPACE 5
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HDLC_TXIDLE_MARK 6
+#define HDLC_TXIDLE_CUSTOM_8 0x10000000
+#define HDLC_TXIDLE_CUSTOM_16 0x20000000
+#define HDLC_ENCODING_NRZ 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HDLC_ENCODING_NRZB 1
+#define HDLC_ENCODING_NRZI_MARK 2
+#define HDLC_ENCODING_NRZI_SPACE 3
+#define HDLC_ENCODING_NRZI HDLC_ENCODING_NRZI_SPACE
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HDLC_ENCODING_BIPHASE_MARK 4
+#define HDLC_ENCODING_BIPHASE_SPACE 5
+#define HDLC_ENCODING_BIPHASE_LEVEL 6
+#define HDLC_ENCODING_DIFF_BIPHASE_LEVEL 7
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HDLC_PREAMBLE_LENGTH_8BITS 0
+#define HDLC_PREAMBLE_LENGTH_16BITS 1
+#define HDLC_PREAMBLE_LENGTH_32BITS 2
+#define HDLC_PREAMBLE_LENGTH_64BITS 3
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HDLC_PREAMBLE_PATTERN_NONE 0
+#define HDLC_PREAMBLE_PATTERN_ZEROS 1
+#define HDLC_PREAMBLE_PATTERN_FLAGS 2
+#define HDLC_PREAMBLE_PATTERN_10 3
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HDLC_PREAMBLE_PATTERN_01 4
+#define HDLC_PREAMBLE_PATTERN_ONES 5
+#define MGSL_MODE_ASYNC 1
+#define MGSL_MODE_HDLC 2
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MGSL_MODE_MONOSYNC 3
+#define MGSL_MODE_BISYNC 4
+#define MGSL_MODE_RAW 6
+#define MGSL_MODE_BASE_CLOCK 7
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MGSL_MODE_XSYNC 8
+#define MGSL_BUS_TYPE_ISA 1
+#define MGSL_BUS_TYPE_EISA 2
+#define MGSL_BUS_TYPE_PCI 5
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MGSL_INTERFACE_MASK 0xf
+#define MGSL_INTERFACE_DISABLE 0
+#define MGSL_INTERFACE_RS232 1
+#define MGSL_INTERFACE_V35 2
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MGSL_INTERFACE_RS422 3
+#define MGSL_INTERFACE_RTS_EN 0x10
+#define MGSL_INTERFACE_LL 0x20
+#define MGSL_INTERFACE_RL 0x40
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MGSL_INTERFACE_MSB_FIRST 0x80
+typedef struct _MGSL_PARAMS
+{
+ unsigned long mode;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned char loopback;
+ unsigned short flags;
+ unsigned char encoding;
+ unsigned long clock_speed;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned char addr_filter;
+ unsigned short crc_type;
+ unsigned char preamble_length;
+ unsigned char preamble;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned long data_rate;
+ unsigned char data_bits;
+ unsigned char stop_bits;
+ unsigned char parity;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+} MGSL_PARAMS, *PMGSL_PARAMS;
+#define MICROGATE_VENDOR_ID 0x13c0
+#define SYNCLINK_DEVICE_ID 0x0010
+#define MGSCC_DEVICE_ID 0x0020
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SYNCLINK_SCA_DEVICE_ID 0x0030
+#define SYNCLINK_GT_DEVICE_ID 0x0070
+#define SYNCLINK_GT4_DEVICE_ID 0x0080
+#define SYNCLINK_AC_DEVICE_ID 0x0090
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SYNCLINK_GT2_DEVICE_ID 0x00A0
+#define MGSL_MAX_SERIAL_NUMBER 30
+#define DiagStatus_OK 0
+#define DiagStatus_AddressFailure 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define DiagStatus_AddressConflict 2
+#define DiagStatus_IrqFailure 3
+#define DiagStatus_IrqConflict 4
+#define DiagStatus_DmaFailure 5
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define DiagStatus_DmaConflict 6
+#define DiagStatus_PciAdapterNotFound 7
+#define DiagStatus_CantAssignPciResources 8
+#define DiagStatus_CantAssignPciMemAddr 9
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define DiagStatus_CantAssignPciIoAddr 10
+#define DiagStatus_CantAssignPciIrq 11
+#define DiagStatus_MemoryError 12
+#define SerialSignal_DCD 0x01
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SerialSignal_TXD 0x02
+#define SerialSignal_RI 0x04
+#define SerialSignal_RXD 0x08
+#define SerialSignal_CTS 0x10
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SerialSignal_RTS 0x20
+#define SerialSignal_DSR 0x40
+#define SerialSignal_DTR 0x80
+struct mgsl_icount {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u32 cts, dsr, rng, dcd, tx, rx;
+ __u32 frame, parity, overrun, brk;
+ __u32 buf_overrun;
+ __u32 txok;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u32 txunder;
+ __u32 txabort;
+ __u32 txtimeout;
+ __u32 rxshort;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u32 rxlong;
+ __u32 rxabort;
+ __u32 rxover;
+ __u32 rxcrc;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u32 rxok;
+ __u32 exithunt;
+ __u32 rxidle;
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct gpio_desc {
+ __u32 state;
+ __u32 smask;
+ __u32 dir;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u32 dmask;
+};
+#define DEBUG_LEVEL_DATA 1
+#define DEBUG_LEVEL_ERROR 2
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define DEBUG_LEVEL_INFO 3
+#define DEBUG_LEVEL_BH 4
+#define DEBUG_LEVEL_ISR 5
+#define MgslEvent_DsrActive 0x0001
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MgslEvent_DsrInactive 0x0002
+#define MgslEvent_Dsr 0x0003
+#define MgslEvent_CtsActive 0x0004
+#define MgslEvent_CtsInactive 0x0008
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MgslEvent_Cts 0x000c
+#define MgslEvent_DcdActive 0x0010
+#define MgslEvent_DcdInactive 0x0020
+#define MgslEvent_Dcd 0x0030
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MgslEvent_RiActive 0x0040
+#define MgslEvent_RiInactive 0x0080
+#define MgslEvent_Ri 0x00c0
+#define MgslEvent_ExitHuntMode 0x0100
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MgslEvent_IdleReceived 0x0200
+#define MGSL_MAGIC_IOC 'm'
+#define MGSL_IOCSPARAMS _IOW(MGSL_MAGIC_IOC,0,struct _MGSL_PARAMS)
+#define MGSL_IOCGPARAMS _IOR(MGSL_MAGIC_IOC,1,struct _MGSL_PARAMS)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MGSL_IOCSTXIDLE _IO(MGSL_MAGIC_IOC,2)
+#define MGSL_IOCGTXIDLE _IO(MGSL_MAGIC_IOC,3)
+#define MGSL_IOCTXENABLE _IO(MGSL_MAGIC_IOC,4)
+#define MGSL_IOCRXENABLE _IO(MGSL_MAGIC_IOC,5)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MGSL_IOCTXABORT _IO(MGSL_MAGIC_IOC,6)
+#define MGSL_IOCGSTATS _IO(MGSL_MAGIC_IOC,7)
+#define MGSL_IOCWAITEVENT _IOWR(MGSL_MAGIC_IOC,8,int)
+#define MGSL_IOCCLRMODCOUNT _IO(MGSL_MAGIC_IOC,15)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MGSL_IOCLOOPTXDONE _IO(MGSL_MAGIC_IOC,9)
+#define MGSL_IOCSIF _IO(MGSL_MAGIC_IOC,10)
+#define MGSL_IOCGIF _IO(MGSL_MAGIC_IOC,11)
+#define MGSL_IOCSGPIO _IOW(MGSL_MAGIC_IOC,16,struct gpio_desc)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MGSL_IOCGGPIO _IOR(MGSL_MAGIC_IOC,17,struct gpio_desc)
+#define MGSL_IOCWAITGPIO _IOWR(MGSL_MAGIC_IOC,18,struct gpio_desc)
+#define MGSL_IOCSXSYNC _IO(MGSL_MAGIC_IOC, 19)
+#define MGSL_IOCGXSYNC _IO(MGSL_MAGIC_IOC, 20)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MGSL_IOCSXCTRL _IO(MGSL_MAGIC_IOC, 21)
+#define MGSL_IOCGXCTRL _IO(MGSL_MAGIC_IOC, 22)
+#endif