lib: Add mlibc

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 496 insertions, 0 deletions

diff --git a/lib/mlibc/abis/linux/signal.h b/lib/mlibc/abis/linux/signal.h
new file mode 100644
index 0000000..d83b401
--- /dev/null
+++ b/lib/mlibc/abis/linux/signal.h
@@ -0,0 +1,496 @@
+#ifndef _ABIBITS_SIGNAL_H
+#define _ABIBITS_SIGNAL_H
+
+#include <stdint.h>
+#include <time.h>
+#include <abi-bits/pid_t.h>
+#include <abi-bits/uid_t.h>
+#include <bits/size_t.h>
+
+#define POLL_IN 1
+#define POLL_OUT 2
+#define POLL_MSG 3
+#define POLL_ERR 4
+#define POLL_PRI 5
+#define POLL_HUP 6
+
+union sigval {
+	int sival_int;
+	void *sival_ptr;
+};
+
+// struct taken from musl.
+
+typedef struct {
+	int si_signo, si_errno, si_code;
+	union {
+		char __pad[128 - 2*sizeof(int) - sizeof(long)];
+		struct {
+			union {
+				struct {
+					pid_t si_pid;
+					uid_t si_uid;
+				} __piduid;
+				struct {
+					int si_timerid;
+					int si_overrun;
+				} __timer;
+			} __first;
+			union {
+				union sigval si_value;
+				struct {
+					int si_status;
+					clock_t si_utime, si_stime;
+				} __sigchld;
+			} __second;
+		} __si_common;
+		struct {
+			void *si_addr;
+			short si_addr_lsb;
+			union {
+				struct {
+					void *si_lower;
+					void *si_upper;
+				} __addr_bnd;
+				unsigned si_pkey;
+			} __first;
+		} __sigfault;
+		struct {
+			long si_band;
+			int si_fd;
+		} __sigpoll;
+		struct {
+			void *si_call_addr;
+			int si_syscall;
+			unsigned si_arch;
+		} __sigsys;
+	} __si_fields;
+} siginfo_t;
+#define si_pid     __si_fields.__si_common.__first.__piduid.si_pid
+#define si_uid     __si_fields.__si_common.__first.__piduid.si_uid
+#define si_status  __si_fields.__si_common.__second.__sigchld.si_status
+#define si_utime   __si_fields.__si_common.__second.__sigchld.si_utime
+#define si_stime   __si_fields.__si_common.__second.__sigchld.si_stime
+#define si_value   __si_fields.__si_common.__second.si_value
+#define si_addr    __si_fields.__sigfault.si_addr
+#define si_addr_lsb __si_fields.__sigfault.si_addr_lsb
+#define si_lower   __si_fields.__sigfault.__first.__addr_bnd.si_lower
+#define si_upper   __si_fields.__sigfault.__first.__addr_bnd.si_upper
+#define si_pkey    __si_fields.__sigfault.__first.si_pkey
+#define si_band    __si_fields.__sigpoll.si_band
+#define si_fd      __si_fields.__sigpoll.si_fd
+#define si_timerid __si_fields.__si_common.__first.__timer.si_timerid
+#define si_overrun __si_fields.__si_common.__first.__timer.si_overrun
+#define si_ptr     si_value.sival_ptr
+#define si_int     si_value.sival_int
+#define si_call_addr __si_fields.__sigsys.si_call_addr
+#define si_syscall __si_fields.__sigsys.si_syscall
+#define si_arch    __si_fields.__sigsys.si_arch
+
+// Required for sys_sigaction sysdep.
+#define SA_NOCLDSTOP 1
+#define SA_NOCLDWAIT 2
+#define SA_SIGINFO 4
+#define SA_ONSTACK 0x08000000
+#define SA_RESTART 0x10000000
+#define SA_NODEFER 0x40000000
+#define SA_RESETHAND 0x80000000
+#define SA_RESTORER 0x04000000
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Argument for signal()
+typedef void (*__sighandler) (int);
+
+#define SIG_ERR ((__sighandler)(void *)(-1))
+#define SIG_DFL ((__sighandler)(void *)(0))
+#define SIG_IGN ((__sighandler)(void *)(1))
+
+#define SIGABRT 6
+#define SIGFPE 8
+#define SIGILL 4
+#define SIGINT 2
+#define SIGSEGV 11
+#define SIGTERM 15
+#define SIGPROF 27
+#define SIGIO 29
+#define SIGPWR 30
+#define SIGRTMIN 35
+#define SIGRTMAX 64
+
+typedef uint64_t sigset_t;
+
+// constants for sigprocmask()
+#define SIG_BLOCK 0
+#define SIG_UNBLOCK 1
+#define SIG_SETMASK 2
+
+#define SIGHUP    1
+#define SIGQUIT   3
+#define SIGTRAP   5
+#define SIGIOT    SIGABRT
+#define SIGBUS    7
+#define SIGKILL   9
+#define SIGUSR1   10
+#define SIGUSR2   12
+#define SIGPIPE   13
+#define SIGALRM   14
+#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 SIGWINCH  28
+#define SIGPOLL   29
+#define SIGSYS    31
+#define SIGUNUSED SIGSYS
+#define SIGCANCEL 32
+
+#define MINSIGSTKSZ 2048
+#define SIGSTKSZ 8192
+#define SS_ONSTACK 1
+#define SS_DISABLE 2
+
+typedef struct __stack {
+	void *ss_sp;
+	int ss_flags;
+	size_t ss_size;
+} stack_t;
+
+// constants for sigev_notify of struct sigevent
+#define SIGEV_SIGNAL 0
+#define SIGEV_NONE 1
+#define SIGEV_THREAD 2
+#define SIGEV_THREAD_ID 4
+
+#define SEGV_MAPERR 1
+#define SEGV_ACCERR 2
+
+#define BUS_ADRALN 1
+#define BUS_ADRERR 2
+#define BUS_OBJERR 3
+#define BUS_MCEERR_AR 4
+#define BUS_MCEERR_AO 5
+
+#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
+
+#define NSIG 65
+
+#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
+
+#if defined(__i386__)
+#define REG_GS 0
+#define REG_FS 1
+#define REG_ES 2
+#define REG_DS 3
+#define REG_EDI 4
+#define REG_ESI 5
+#define REG_EBP 6
+#define REG_ESP 7
+#define REG_EBX 8
+#define REG_EDX 9
+#define REG_ECX 10
+#define REG_EAX 11
+#define REG_TRAPNO 12
+#define REG_ERR 13
+#define REG_EIP 14
+#define REG_CS 15
+#define REG_EFL 16
+#define REG_UESP 17
+#define REG_SS 18
+#define NGREG 19
+#elif defined(__x86_64__)
+#define REG_R8 0
+#define REG_R9 1
+#define REG_R10 2
+#define REG_R11 3
+#define REG_R12 4
+#define REG_R13 5
+#define REG_R14 6
+#define REG_R15 7
+#define REG_RDI 8
+#define REG_RSI 9
+#define REG_RBP 10
+#define REG_RBX 11
+#define REG_RDX 12
+#define REG_RAX 13
+#define REG_RCX 14
+#define REG_RSP 15
+#define REG_RIP 16
+#define REG_EFL 17
+#define REG_CSGSFS 18
+#define REG_ERR 19
+#define REG_TRAPNO 20
+#define REG_OLDMASK 21
+#define REG_CR2 22
+#define NGREG 23
+#endif
+
+#include <bits/threads.h>
+
+struct sigevent {
+	union sigval sigev_value;
+	int sigev_notify;
+	int sigev_signo;
+	void (*sigev_notify_function)(union sigval);
+	struct __mlibc_threadattr *sigev_notify_attributes;
+	pid_t sigev_notify_thread_id;
+};
+
+struct sigaction {
+	union {
+		void (*sa_handler)(int);
+		void (*sa_sigaction)(int, siginfo_t *, void *);
+	} __sa_handler;
+	sigset_t sa_mask;
+	int sa_flags;
+	void (*sa_restorer)(void);
+};
+#define sa_handler __sa_handler.sa_handler
+#define sa_sigaction __sa_handler.sa_sigaction
+
+// Taken from the linux kernel headers
+
+#if defined(__x86_64__) || defined(__i386__)
+
+struct _fpreg {
+	unsigned short significand[4];
+	unsigned short exponent;
+};
+
+struct _fpxreg {
+	unsigned short significand[4];
+	unsigned short exponent;
+	unsigned short padding[3];
+};
+
+struct _xmmreg {
+	uint32_t element[4];
+};
+
+struct _fpstate {
+#if defined(__x86_64__)
+	uint16_t cwd;
+	uint16_t swd;
+	uint16_t ftw;
+	uint16_t fop;
+	uint64_t rip;
+	uint64_t rdp;
+	uint32_t mxcsr;
+	uint32_t mxcr_mask;
+	struct _fpxreg _st[8];
+	struct _xmmreg _xmm[16];
+	uint32_t padding[24];
+#elif defined(__i386__)
+	uint32_t cw;
+	uint32_t sw;
+	uint32_t tag;
+	uint32_t ipoff;
+	uint32_t cssel;
+	uint32_t dataoff;
+	uint32_t datasel;
+	struct _fpreg _st[8];
+	uint16_t status;
+	uint16_t magic;
+
+	// FXSR FPU
+
+	uint32_t _fxsr_env[6];
+	uint32_t mxscr;
+	uint32_t reserved;
+	struct _fpxreg _fxsr_st[8];
+	struct _xmmreg _xmm[8];
+
+	uint32_t padding2[56];
+#endif
+};
+
+typedef struct {
+	unsigned long gregs[NGREG];
+	struct _fpstate *fpregs;
+	unsigned long __reserved1[8];
+} 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;
+
+#elif defined(__riscv) && __riscv_xlen == 64
+// Definitions from Linux kernel headers.
+
+#define NGREG 32
+
+enum {
+  REG_PC = 0,
+#define REG_PC REG_PC
+  REG_RA = 1,
+#define REG_RA REG_RA
+  REG_SP = 2,
+#define REG_SP REG_SP
+  REG_TP = 4,
+#define REG_TP REG_TP
+  REG_S0 = 8,
+#define REG_S0 REG_S0
+  REG_A0 = 10,
+#define REG_A0 REG_A0
+};
+
+struct __riscv_f_ext_state {
+	uint32_t f[32];
+	uint32_t fcsr;
+};
+
+struct __riscv_d_ext_state {
+	uint64_t f[32];
+	uint32_t fcsr;
+};
+
+struct __riscv_q_ext_state {
+	uint64_t f[64] __attribute__((__aligned__(16)));
+	uint32_t fcsr;
+	uint32_t reserved[3];
+};
+
+union __riscv_fp_state {
+	struct __riscv_f_ext_state f;
+	struct __riscv_d_ext_state d;
+	struct __riscv_q_ext_state q;
+};
+
+typedef unsigned long __riscv_mc_gp_state[NGREG];
+
+typedef struct sigcontext {
+	__riscv_mc_gp_state gregs;
+	union __riscv_fp_state fpregs;
+} mcontext_t;
+
+typedef struct __ucontext {
+	unsigned long uc_flags;
+	struct ucontext	*uc_link;
+	stack_t uc_stack;
+	sigset_t uc_sigmask;
+	uint8_t  __unused[1024 / 8 - sizeof(sigset_t)];
+	mcontext_t uc_mcontext;
+} ucontext_t;
+
+#elif defined (__aarch64__)
+
+#define NGREG 34
+
+typedef struct sigcontext {
+	uint64_t fault_address;
+	uint64_t regs[31];
+	uint64_t sp;
+	uint64_t pc;
+	uint64_t pstate;
+	uint8_t __reserved[4096];
+} mcontext_t;
+
+#define FPSIMD_MAGIC 0x46508001
+#define ESR_MAGIC 0x45535201
+#define EXTRA_MAGIC 0x45585401
+#define SVE_MAGIC 0x53564501
+struct _aarch64_ctx {
+	uint32_t magic;
+	uint32_t size;
+};
+struct fpsimd_context {
+	struct _aarch64_ctx head;
+	uint32_t fpsr;
+	uint32_t fpcr;
+	__uint128_t vregs[32];
+};
+struct esr_context {
+	struct _aarch64_ctx head;
+	uint64_t esr;
+};
+struct extra_context {
+	struct _aarch64_ctx head;
+	uint64_t datap;
+	uint32_t size;
+	uint32_t __reserved[3];
+};
+struct sve_context {
+	struct _aarch64_ctx head;
+	uint16_t vl;
+	uint16_t __reserved[3];
+};
+#define SVE_VQ_BYTES		16
+#define SVE_VQ_MIN		1
+#define SVE_VQ_MAX		512
+#define SVE_VL_MIN		(SVE_VQ_MIN * SVE_VQ_BYTES)
+#define SVE_VL_MAX		(SVE_VQ_MAX * SVE_VQ_BYTES)
+#define SVE_NUM_ZREGS		32
+#define SVE_NUM_PREGS		16
+#define sve_vl_valid(vl) \
+	((vl) % SVE_VQ_BYTES == 0 && (vl) >= SVE_VL_MIN && (vl) <= SVE_VL_MAX)
+#define sve_vq_from_vl(vl)	((vl) / SVE_VQ_BYTES)
+#define sve_vl_from_vq(vq)	((vq) * SVE_VQ_BYTES)
+#define SVE_SIG_ZREG_SIZE(vq)	((unsigned)(vq) * SVE_VQ_BYTES)
+#define SVE_SIG_PREG_SIZE(vq)	((unsigned)(vq) * (SVE_VQ_BYTES / 8))
+#define SVE_SIG_FFR_SIZE(vq)	SVE_SIG_PREG_SIZE(vq)
+#define SVE_SIG_REGS_OFFSET					\
+	((sizeof(struct sve_context) + (SVE_VQ_BYTES - 1))	\
+		/ SVE_VQ_BYTES * SVE_VQ_BYTES)
+#define SVE_SIG_ZREGS_OFFSET	SVE_SIG_REGS_OFFSET
+#define SVE_SIG_ZREG_OFFSET(vq, n) \
+	(SVE_SIG_ZREGS_OFFSET + SVE_SIG_ZREG_SIZE(vq) * (n))
+#define SVE_SIG_ZREGS_SIZE(vq) \
+	(SVE_SIG_ZREG_OFFSET(vq, SVE_NUM_ZREGS) - SVE_SIG_ZREGS_OFFSET)
+#define SVE_SIG_PREGS_OFFSET(vq) \
+	(SVE_SIG_ZREGS_OFFSET + SVE_SIG_ZREGS_SIZE(vq))
+#define SVE_SIG_PREG_OFFSET(vq, n) \
+	(SVE_SIG_PREGS_OFFSET(vq) + SVE_SIG_PREG_SIZE(vq) * (n))
+#define SVE_SIG_PREGS_SIZE(vq) \
+	(SVE_SIG_PREG_OFFSET(vq, SVE_NUM_PREGS) - SVE_SIG_PREGS_OFFSET(vq))
+#define SVE_SIG_FFR_OFFSET(vq) \
+	(SVE_SIG_PREGS_OFFSET(vq) + SVE_SIG_PREGS_SIZE(vq))
+#define SVE_SIG_REGS_SIZE(vq) \
+	(SVE_SIG_FFR_OFFSET(vq) + SVE_SIG_FFR_SIZE(vq) - SVE_SIG_REGS_OFFSET)
+#define SVE_SIG_CONTEXT_SIZE(vq) (SVE_SIG_REGS_OFFSET + SVE_SIG_REGS_SIZE(vq))
+
+typedef struct __ucontext {
+	unsigned long uc_flags;
+	struct __ucontext *uc_link;
+	stack_t uc_stack;
+	sigset_t uc_sigmask;
+	mcontext_t uc_mcontext;
+} ucontext_t;
+
+#else
+#error "Missing architecture specific code."
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // _ABIBITS_SIGNAL_H