a585ddf578
Linux passes the arguments in registers, but our compiler expects arguments on the stack. Signal handlers got garbage instead of the signal number. Some handlers, like the one in lang/m2/libm2/sigtrp.c, need the correct signal number. I write a "bridge" in PowerPC assembly that moves the arguments to the stack. I put the bridge in sigaction(), so I provide a signal() that calls sigaction(). I remove the *.c glob or wildcard from build.lua, so linuxppc only compiles its own signal.c, not the other signal.c for linux386 and linux68k. My bridge uses sigprocmask(), so I also add sigprocmask(). Because linux386 and linux68k use globs, they also get sigprocmask(). I sync the header files so all three Linux platforms declare execve(), sigprocmask(), and unlink(), but not remove(), because we have remove() in <stdio.h>. I am using sigaction.s to test some features that we recently added to our PowerPC assembler. These are the "hi16[...]" and "lo16[...]" syntax, and also the extended names like "beq", "cmpwi", "li", "subi".
134 lines
4.2 KiB
C
134 lines
4.2 KiB
C
/*
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* unistd.h - standard system calls
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*/
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/* $Id$ */
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#ifndef _UNISTD_H
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#define _UNISTD_H
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#include <stddef.h>
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#include <time.h>
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/* Types */
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typedef int pid_t;
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typedef int mode_t;
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typedef long suseconds_t;
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/* Time handling. */
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struct timeval
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{
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time_t tv_sec;
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suseconds_t tv_usec;
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};
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struct timezone
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{
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int tz_minuteswest;
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int tz_dsttime;
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}; /* obsolete, unused */
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extern int gettimeofday(struct timeval* tv, struct timezone* tz);
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extern int settimeofday(const struct timeval* tv, const struct timezone* tz);
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/* File access. */
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enum
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{
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O_ACCMODE = 0x3,
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O_RDONLY = 0,
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O_WRONLY = 1,
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O_RDWR = 2,
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O_CREAT = 0x40,
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O_TRUNC = 0x200,
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O_APPEND = 0x400
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};
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extern int open(const char* path, int access, ...);
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extern int creat(const char* path, mode_t mode);
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extern int close(int d);
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extern int read(int fd, void* buffer, size_t count);
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extern int write(int fd, void* buffer, size_t count);
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extern off_t lseek(int fildes, off_t offset, int whence);
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extern int fcntl(int fd, int op, ...);
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extern int unlink(const char* path);
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/* Special variables */
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extern char** environ;
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/* Implemented system calls */
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extern void _exit(int);
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extern pid_t getpid(void);
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extern int brk(void* ptr);
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extern void* sbrk(int increment);
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extern int isatty(int d);
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extern int execve(const char *path, char *const argv[], char *const envp[]);
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/* Signal handling */
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typedef int sig_atomic_t;
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#define SIG_ERR ((sighandler_t) -1) /* Error return. */
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#define SIG_DFL ((sighandler_t) 0) /* Default action. */
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#define SIG_IGN ((sighandler_t) 1) /* Ignore signal. */
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#define SIGHUP 1 /* Hangup (POSIX). */
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#define SIGINT 2 /* Interrupt (ANSI). */
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#define SIGQUIT 3 /* Quit (POSIX). */
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#define SIGILL 4 /* Illegal instruction (ANSI). */
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#define SIGTRAP 5 /* Trace trap (POSIX). */
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#define SIGABRT 6 /* Abort (ANSI). */
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#define SIGIOT 6 /* IOT trap (4.2 BSD). */
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#define SIGBUS 7 /* BUS error (4.2 BSD). */
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#define SIGFPE 8 /* Floating-point exception (ANSI). */
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#define SIGKILL 9 /* Kill, unblockable (POSIX). */
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#define SIGUSR1 10 /* User-defined signal 1 (POSIX). */
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#define SIGSEGV 11 /* Segmentation violation (ANSI). */
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#define SIGUSR2 12 /* User-defined signal 2 (POSIX). */
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#define SIGPIPE 13 /* Broken pipe (POSIX). */
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#define SIGALRM 14 /* Alarm clock (POSIX). */
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#define SIGTERM 15 /* Termination (ANSI). */
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#define SIGSTKFLT 16 /* Stack fault. */
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#define SIGCLD SIGCHLD /* Same as SIGCHLD (System V). */
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#define SIGCHLD 17 /* Child status has changed (POSIX). */
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#define SIGCONT 18 /* Continue (POSIX). */
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#define SIGSTOP 19 /* Stop, unblockable (POSIX). */
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#define SIGTSTP 20 /* Keyboard stop (POSIX). */
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#define SIGTTIN 21 /* Background read from tty (POSIX). */
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#define SIGTTOU 22 /* Background write to tty (POSIX). */
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#define SIGURG 23 /* Urgent condition on socket (4.2 BSD). */
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#define SIGXCPU 24 /* CPU limit exceeded (4.2 BSD). */
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#define SIGXFSZ 25 /* File size limit exceeded (4.2 BSD). */
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#define SIGVTALRM 26 /* Virtual alarm clock (4.2 BSD). */
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#define SIGPROF 27 /* Profiling alarm clock (4.2 BSD). */
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#define SIGWINCH 28 /* Window size change (4.3 BSD, Sun). */
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#define SIGPOLL SIGIO /* Pollable event occurred (System V). */
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#define SIGIO 29 /* I/O now possible (4.2 BSD). */
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#define SIGPWR 30 /* Power failure restart (System V). */
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#define SIGSYS 31 /* Bad system call. */
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#define SIGUNUSED 31
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#define _NSIG 32 /* Biggest signal number + 1
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(not including real-time signals). */
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/* sigprocmask */
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#define SIG_BLOCK 0
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#define SIG_UNBLOCK 1
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#define SIG_SETMASK 2
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typedef unsigned long sigset_t;
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typedef void (*sighandler_t)(int);
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extern sighandler_t signal(int signum, sighandler_t handler);
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extern int sigprocmask(int, const sigset_t *, sigset_t *);
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extern int raise(int signum);
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#endif
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