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https://github.com/jart/cosmopolitan.git
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Incorporate more small improvements
This commit is contained in:
Justine Tunney
parent
1d4eb08fa1
commit
f83eb440f7
20 changed files with 121 additions and 256 deletions
104
libc/errno.h
104
libc/errno.h
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@ -4,25 +4,35 @@
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COSMOPOLITAN_C_START_
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/**
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* @fileoverview System error codes.
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* @see libc/sysv/consts.sh for numbers
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* @fileoverview System Five error codes.
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*
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* This file defines the `errno` global variable. When system calls
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* (e.g. read(), write(), etc.) fail they return -1 to indicate the
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* failure, and that is *the only* error return value. System calls
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* also update `errno` too whenever -1 is returned (otherwise errno
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* isn't changed) to be a non-zero value holding one of the numbers
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* below, in order to indicate why the system call failed.
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*
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* There is only one exception to the above rule; some system calls
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* are documented with the `@returnserrno` tag, which means they'll
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* return the error number rather than stuffing it in a global. You
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* can usually spot these system calls easily since most of them'll
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* have names like `posix_foo()` or `pthread_bar()`.
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*
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* @see libc/sysv/consts.sh for assigned numbers
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* @see libc/sysv/dos2errno.sh for multimapped numbers
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*/
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#if defined(__GNUC__) && defined(__x86_64__) && defined(__MNO_RED_ZONE__) && \
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!defined(__STRICT_ANSI__) && !defined(__cplusplus)
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#define errno \
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(*({ \
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errno_t *_ep; \
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asm("call\t__errno_location" : "=a"(_ep) : /* no inputs */ : "cc"); \
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_ep; \
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}))
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#elif defined(__GNUC__) && defined(__aarch64__) && \
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!defined(__STRICT_ANSI__) && !defined(__cplusplus)
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#define errno \
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(*({ \
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errno_t *_ep; \
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asm("sub\t%0,x28,#1092" : "=r"(_ep)); \
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_ep; \
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#if defined(__GNUC__) && defined(__aarch64__) && !defined(__STRICT_ANSI__) && \
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!defined(__cplusplus)
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/* this header is included by 700+ files; therefore we */
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/* hand-roll &__get_tls()->tib_errno to avoid #include */
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/* cosmopolitan uses x28 as the tls register b/c apple */
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#define errno \
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(*({ \
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errno_t *__ep; \
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asm("sub\t%0,x28,#1092" : "=r"(__ep)); \
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__ep; \
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}))
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#else
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#define errno (*__errno_location())
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@ -493,7 +503,7 @@ extern const errno_t ENOMEDIUM;
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extern const errno_t EMEDIUMTYPE;
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/**
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* Inappropriate file type or format. (BSD only)
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* Inappropriate file type or format.
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*/
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extern const errno_t EFTYPE;
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@ -513,7 +523,6 @@ extern const errno_t EPROGUNAVAIL;
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extern const errno_t EPWROFF;
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extern const errno_t ERPCMISMATCH;
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extern const errno_t ESHLIBVERS;
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extern const errno_t EADV;
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extern const errno_t EBADE;
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extern const errno_t EBADFD;
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@ -558,35 +567,20 @@ extern const errno_t EXFULL;
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#define EACCES EACCES
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#define EADDRINUSE EADDRINUSE
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#define EADDRNOTAVAIL EADDRNOTAVAIL
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#define EADV EADV
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#define EAFNOSUPPORT EAFNOSUPPORT
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#define EAGAIN EAGAIN
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#define EALREADY EALREADY
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#define EAUTH EAUTH
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#define EBADARCH EBADARCH
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#define EBADE EBADE
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#define EBADEXEC EBADEXEC
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#define EBADF EBADF
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#define EBADFD EBADFD
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#define EBADMACHO EBADMACHO
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#define EBADMSG EBADMSG
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#define EBADR EBADR
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#define EBADRPC EBADRPC
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#define EBADRQC EBADRQC
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#define EBADSLT EBADSLT
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#define EBUSY EBUSY
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#define ECANCELED ECANCELED
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#define ECHILD ECHILD
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#define ECHRNG ECHRNG
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#define ECOMM ECOMM
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#define ECONNABORTED ECONNABORTED
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#define ECONNREFUSED ECONNREFUSED
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#define ECONNRESET ECONNRESET
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#define EDEADLK EDEADLK
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#define EDESTADDRREQ EDESTADDRREQ
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#define EDEVERR EDEVERR
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#define EDOM EDOM
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#define EDOTDOT EDOTDOT
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#define EDQUOT EDQUOT
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#define EEXIST EEXIST
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#define EFAULT EFAULT
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@ -594,7 +588,6 @@ extern const errno_t EXFULL;
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#define EFTYPE EFTYPE
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#define EHOSTDOWN EHOSTDOWN
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#define EHOSTUNREACH EHOSTUNREACH
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#define EHWPOISON EHWPOISON
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#define EIDRM EIDRM
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#define EILSEQ EILSEQ
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#define EINPROGRESS EINPROGRESS
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@ -603,20 +596,6 @@ extern const errno_t EXFULL;
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#define EIO EIO
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#define EISCONN EISCONN
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#define EISDIR EISDIR
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#define EISNAM EISNAM
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#define EKEYEXPIRED EKEYEXPIRED
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#define EKEYREJECTED EKEYREJECTED
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#define EKEYREVOKED EKEYREVOKED
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#define EL2HLT EL2HLT
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#define EL2NSYNC EL2NSYNC
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#define EL3HLT EL3HLT
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#define EL3RST EL3RST
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#define ELIBACC ELIBACC
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#define ELIBBAD ELIBBAD
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#define ELIBEXEC ELIBEXEC
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#define ELIBMAX ELIBMAX
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#define ELIBSCN ELIBSCN
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#define ELNRNG ELNRNG
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#define ELOOP ELOOP
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#define EMEDIUMTYPE EMEDIUMTYPE
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#define EMFILE EMFILE
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@ -624,29 +603,21 @@ extern const errno_t EXFULL;
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#define EMSGSIZE EMSGSIZE
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#define EMULTIHOP EMULTIHOP
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#define ENAMETOOLONG ENAMETOOLONG
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#define ENAVAIL ENAVAIL
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#define ENEEDAUTH ENEEDAUTH
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#define ENETDOWN ENETDOWN
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#define ENETRESET ENETRESET
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#define ENETUNREACH ENETUNREACH
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#define ENFILE ENFILE
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#define ENOANO ENOANO
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#define ENOATTR ENOATTR
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#define ENOBUFS ENOBUFS
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#define ENOCSI ENOCSI
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#define ENODATA ENODATA
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#define ENODEV ENODEV
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#define ENOENT ENOENT
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#define ENOEXEC ENOEXEC
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#define ENOKEY ENOKEY
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#define ENOLCK ENOLCK
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#define ENOLINK ENOLINK
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#define ENOMEDIUM ENOMEDIUM
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#define ENOMEM ENOMEM
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#define ENOMSG ENOMSG
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#define ENONET ENONET
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#define ENOPKG ENOPKG
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#define ENOPOLICY ENOPOLICY
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#define ENOPROTOOPT ENOPROTOOPT
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#define ENOSPC ENOSPC
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#define ENOSR ENOSR
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@ -656,12 +627,10 @@ extern const errno_t EXFULL;
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#define ENOTCONN ENOTCONN
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#define ENOTDIR ENOTDIR
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#define ENOTEMPTY ENOTEMPTY
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#define ENOTNAM ENOTNAM
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#define ENOTRECOVERABLE ENOTRECOVERABLE
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#define ENOTSOCK ENOTSOCK
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#define ENOTSUP ENOTSUP
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#define ENOTTY ENOTTY
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#define ENOTUNIQ ENOTUNIQ
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#define ENXIO ENXIO
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#define EOPNOTSUPP EOPNOTSUPP
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#define EOVERFLOW EOVERFLOW
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@ -669,43 +638,28 @@ extern const errno_t EXFULL;
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#define EPERM EPERM
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#define EPFNOSUPPORT EPFNOSUPPORT
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#define EPIPE EPIPE
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#define EPROCLIM EPROCLIM
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#define EPROCUNAVAIL EPROCUNAVAIL
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#define EPROGMISMATCH EPROGMISMATCH
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#define EPROGUNAVAIL EPROGUNAVAIL
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#define EPROTO EPROTO
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#define EPROTONOSUPPORT EPROTONOSUPPORT
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#define EPROTOTYPE EPROTOTYPE
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#define EPWROFF EPWROFF
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#define ERANGE ERANGE
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#define EREMCHG EREMCHG
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#define EREMOTE EREMOTE
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#define EREMOTEIO EREMOTEIO
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#define ERESTART ERESTART
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#define ERFKILL ERFKILL
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#define EROFS EROFS
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#define ERPCMISMATCH ERPCMISMATCH
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#define ESHLIBVERS ESHLIBVERS
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#define ESHUTDOWN ESHUTDOWN
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#define ESOCKTNOSUPPORT ESOCKTNOSUPPORT
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#define ESPIPE ESPIPE
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#define ESRCH ESRCH
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#define ESRMNT ESRMNT
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#define ESTALE ESTALE
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#define ESTRPIPE ESTRPIPE
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#define ETIME ETIME
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#define ETIMEDOUT ETIMEDOUT
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#define ETOOMANYREFS ETOOMANYREFS
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#define ETXTBSY ETXTBSY
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#define EUCLEAN EUCLEAN
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#define EUNATCH EUNATCH
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#define EUSERS EUSERS
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#define EWOULDBLOCK EAGAIN
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#define EXDEV EXDEV
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#define EXFULL EXFULL
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extern errno_t __errno;
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errno_t *__errno_location(void);
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errno_t *__errno_location(void) dontthrow pureconst;
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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