diff --git a/libc/kernel/uapi/asm-mips/asm/hwcap.h b/libc/kernel/uapi/asm-mips/asm/hwcap.h
index 638017e..6151555 100644
--- a/libc/kernel/uapi/asm-mips/asm/hwcap.h
+++ b/libc/kernel/uapi/asm-mips/asm/hwcap.h
@@ -20,4 +20,5 @@
 #define _UAPI_ASM_HWCAP_H
 #define HWCAP_MIPS_R6 (1 << 0)
 #define HWCAP_MIPS_MSA (1 << 1)
+#define HWCAP_MIPS_CRC32 (1 << 2)
 #endif
diff --git a/libc/kernel/uapi/asm-mips/asm/mman.h b/libc/kernel/uapi/asm-mips/asm/mman.h
index 5e8e28a..7ca4a99 100644
--- a/libc/kernel/uapi/asm-mips/asm/mman.h
+++ b/libc/kernel/uapi/asm-mips/asm/mman.h
@@ -44,6 +44,7 @@
 #define MAP_NONBLOCK 0x20000
 #define MAP_STACK 0x40000
 #define MAP_HUGETLB 0x80000
+#define MAP_FIXED_NOREPLACE 0x100000
 #define MS_ASYNC 0x0001
 #define MS_INVALIDATE 0x0002
 #define MS_SYNC 0x0004
diff --git a/libc/kernel/uapi/asm-mips/asm/siginfo.h b/libc/kernel/uapi/asm-mips/asm/siginfo.h
index 413abd9..c37107b 100644
--- a/libc/kernel/uapi/asm-mips/asm/siginfo.h
+++ b/libc/kernel/uapi/asm-mips/asm/siginfo.h
@@ -20,7 +20,6 @@
 #define _UAPI_ASM_SIGINFO_H
 #define __ARCH_SIGEV_PREAMBLE_SIZE (sizeof(long) + 2 * sizeof(int))
 #undef __ARCH_SI_TRAPNO
-#define HAVE_ARCH_SIGINFO_T
 #if _MIPS_SZLONG == 32
 #define __ARCH_SI_PREAMBLE_SIZE (3 * sizeof(int))
 #elif _MIPS_SZLONG==64
@@ -28,69 +27,8 @@
 #else
 #error _MIPS_SZLONG neither 32 nor 64
 #endif
-#define __ARCH_SIGSYS
+#define __ARCH_HAS_SWAPPED_SIGINFO
 #include <asm-generic/siginfo.h>
-typedef struct siginfo {
-  int si_signo;
-  int si_code;
-  int si_errno;
-  int __pad0[SI_MAX_SIZE / sizeof(int) - SI_PAD_SIZE - 3];
-  union {
-    int _pad[SI_PAD_SIZE];
-    struct {
-      __kernel_pid_t _pid;
-      __ARCH_SI_UID_T _uid;
-    } _kill;
-    struct {
-      __kernel_timer_t _tid;
-      int _overrun;
-      char _pad[sizeof(__ARCH_SI_UID_T) - sizeof(int)];
-      sigval_t _sigval;
-      int _sys_private;
-    } _timer;
-    struct {
-      __kernel_pid_t _pid;
-      __ARCH_SI_UID_T _uid;
-      sigval_t _sigval;
-    } _rt;
-    struct {
-      __kernel_pid_t _pid;
-      __ARCH_SI_UID_T _uid;
-      int _status;
-      __kernel_clock_t _utime;
-      __kernel_clock_t _stime;
-    } _sigchld;
-    struct {
-      __kernel_pid_t _pid;
-      __kernel_clock_t _utime;
-      int _status;
-      __kernel_clock_t _stime;
-    } _irix_sigchld;
-    struct {
-      void __user * _addr;
-#ifdef __ARCH_SI_TRAPNO
-      int _trapno;
-#endif
-      short _addr_lsb;
-      union {
-        struct {
-          void __user * _lower;
-          void __user * _upper;
-        } _addr_bnd;
-        __u32 _pkey;
-      };
-    } _sigfault;
-    struct {
-      __ARCH_SI_BAND_T _band;
-      int _fd;
-    } _sigpoll;
-    struct {
-      void __user * _call_addr;
-      int _syscall;
-      unsigned int _arch;
-    } _sigsys;
-  } _sifields;
-} siginfo_t;
 #undef SI_ASYNCIO
 #undef SI_TIMER
 #undef SI_MESGQ