user: implement mlibc as the libc, finally.

It's finally done..

Signed-off-by: kaguya <vpshinomiya@protonmail.com>

user/include/mlibc/abis/dripos/signal.h

@@ -0,0 +1,184 @@
+#ifndef _ABIBITS_SIGNAL_H
+#define _ABIBITS_SIGNAL_H
+
+#if __MLIBC_BUILDING_MLIBC
+#warning signal.h is a broken header originally from the deprecated "mlibc" ABI. \
+    We suggest to use abis/linux/signal.h instead. \
+    Note that this will potentially require kernel changes.
+#endif
+
+#include <abi-bits/pid_t.h>
+#include <abi-bits/uid_t.h>
+#include <abi-bits/sigevent.h>
+#include <bits/types.h>
+#include <bits/size_t.h>
+
+typedef struct {
+	int si_signo;
+	int si_code;
+	int si_errno;
+	pid_t si_pid;
+	uid_t si_uid;
+	void *si_addr;
+	int si_status;
+	union sigval si_value;
+} siginfo_t;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Argument for signal() */
+typedef void (*__sighandler) (int);
+
+#define SIG_ERR ((__sighandler)(void *)(-1))
+#define SIG_DFL ((__sighandler)(void *)(-2))
+#define SIG_IGN ((__sighandler)(void *)(-3))
+
+#define SIGHUP 1
+#define SIGINT 2
+#define SIGQUIT 3
+#define SIGILL 4
+#define SIGTRAP 5
+#define SIGABRT 6
+#define SIGBUS 7
+#define SIGFPE 8
+#define SIGKILL 9
+#define SIGUSR1 10
+#define SIGSEGV 11
+#define SIGUSR2 12
+#define SIGPIPE 13
+#define SIGALRM 14
+#define SIGTERM 15
+#define SIGSTKFLT 16
+#define SIGCHLD 17
+#define SIGCONT 18
+#define SIGSTOP 19
+#define SIGTSTP 20
+#define SIGTTIN 21
+#define SIGTTOU 22
+#define SIGURG 23
+#define SIGXCPU 24
+#define SIGXFSZ 25
+#define SIGVTALRM 26
+#define SIGPROF 27
+#define SIGWINCH 28
+#define SIGIO 29
+#define SIGPOLL SIGIO
+#define SIGPWR 30
+#define SIGSYS 31
+#define SIGRTMIN 32
+#define SIGRTMAX 33
+#define SIGCANCEL 34
+
+/* siginfo->si_info constants */
+/* SIGBUS */
+#define BUS_ADRALN 1
+#define BUS_ADRERR 2
+#define BUS_OBJERR 3
+
+/* SIGILL */
+#define ILL_ILLOPC 1
+#define ILL_ILLOPN 2
+#define ILL_ILLADR 3
+#define ILL_ILLTRP 4
+#define ILL_PRVOPC 5
+#define ILL_PRVREG 6
+#define ILL_COPROC 7
+#define ILL_BADSTK 8
+#define ILL_BADIADDR 9
+
+/* SIGSEGV */
+#define SEGV_MAPERR 1
+#define SEGV_ACCERR 2
+
+typedef __mlibc_uint64 sigset_t;
+
+#define SIGUNUSED SIGSYS
+
+/* constants for sigprocmask() */
+#define SIG_BLOCK 1
+#define SIG_UNBLOCK 2
+#define SIG_SETMASK 3
+
+#define SA_NOCLDSTOP (1 << 0)
+#define SA_ONSTACK (1 << 1)
+#define SA_RESETHAND (1 << 2)
+#define SA_RESTART (1 << 3)
+#define SA_SIGINFO (1 << 4)
+#define SA_NOCLDWAIT (1 << 5)
+#define SA_NODEFER (1 << 6)
+
+#define MINSIGSTKSZ 2048
+#define SIGSTKSZ 8192
+#define SS_ONSTACK 1
+#define SS_DISABLE 2
+
+typedef struct __stack {
+        void *ss_sp;
+        size_t ss_size;
+        int ss_flags;
+} stack_t;
+
+/* constants for sigev_notify of struct sigevent */
+#define SIGEV_NONE 1
+#define SIGEV_SIGNAL 2
+#define SIGEV_THREAD 3
+
+#define SI_ASYNCNL (-60)
+#define SI_TKILL (-6)
+#define SI_SIGIO (-5)
+#define SI_ASYNCIO (-4)
+#define SI_MESGQ (-3)
+#define SI_TIMER (-2)
+#define SI_QUEUE (-1)
+#define SI_USER 0
+#define SI_KERNEL 128
+
+#define NSIG 65
+#define _NSIG NSIG
+
+#define CLD_EXITED 1
+#define CLD_KILLED 2
+#define CLD_DUMPED 3
+#define CLD_TRAPPED 4
+#define CLD_STOPPED 5
+#define CLD_CONTINUED 6
+
+struct sigaction {
+	void (*sa_handler)(int);
+	sigset_t sa_mask;
+	int sa_flags;
+	void (*sa_sigaction)(int, siginfo_t *, void *);
+};
+
+#if defined(__x86_64__) || defined(__i386__) || defined(__aarch64__)
+/* TODO: This is wrong for AArch64. */
+
+typedef struct {
+	unsigned long oldmask;
+	unsigned long gregs[16];
+	unsigned long pc, pr, sr;
+	unsigned long gbr, mach, macl;
+	unsigned long fpregs[16];
+	unsigned long xfpregs[16];
+	unsigned int fpscr, fpul, ownedfp;
+} mcontext_t;
+
+typedef struct __ucontext {
+	unsigned long uc_flags;
+	struct __ucontext *uc_link;
+	stack_t uc_stack;
+	mcontext_t uc_mcontext;
+	sigset_t uc_sigmask;
+} ucontext_t;
+
+#else
+#error "Missing architecture specific code."
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ABIBITS_SIGNAL_H */