initial commit of the arm port

this port assumes eabi calling conventions, eabi linux syscall
convention, and presence of the kernel helpers at 0xffff0f?0 needed
for threads support. otherwise it makes very few assumptions, and the
code should work even on armv4 without thumb support, as well as on
systems with thumb interworking. the bits headers declare this a
little endian system, but as far as i can tell the code should work
equally well on big endian.

some small details are probably broken; so far, testing has been
limited to qemu/aboriginal linux.

1 files changed, 182 insertions, 0 deletions

diff --git a/arch/arm/bits/signal.h b/arch/arm/bits/signal.h
new file mode 100644
index 00000000..1a1e7fc3
--- /dev/null
+++ b/arch/arm/bits/signal.h
@@ -0,0 +1,182 @@
+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
+
+typedef struct
+#ifdef _GNU_SOURCE
+sigcontext
+#endif
+{
+	unsigned long trap_no, error_code, oldmask;
+	unsigned long arm_r0, arm_r1, arm_r2, arm_r3;
+	unsigned long arm_r4, arm_r5, arm_r6, arm_r7;
+	unsigned long arm_r8, arm_r9, arm_r10, arm_fp;
+	unsigned long arm_ip, arm_sp, arm_lr, arm_pc;
+	unsigned long arm_cpsr, fault_address;
+} 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;
+	unsigned long uc_regspace[128];
+} ucontext_t;
+
+struct __siginfo
+{
+	int si_signo;
+	int si_errno;
+	int si_code;
+	union
+	{
+		char __pad[128 - 3*sizeof(int)];
+		struct {
+			pid_t si_pid;
+			uid_t si_uid;
+			union sigval si_sigval;
+		} __rt;
+		struct {
+			unsigned int si_timer1;
+			unsigned int si_timer2;
+		} __timer;
+		struct {
+			pid_t si_pid;
+			uid_t si_uid;
+			int si_status;
+			clock_t si_utime;
+			clock_t si_stime;
+		} __sigchld;
+		struct {
+			void *si_addr;
+		} __sigfault;
+		struct {
+			long int si_band;
+			int si_fd;
+		} __sigpoll;
+	} __si_fields;
+};
+
+#define si_pid     __si_fields.__sigchld.si_pid
+#define si_uid     __si_fields.__sigchld.si_uid
+#define si_status  __si_fields.__sigchld.si_status
+#define si_utime   __si_fields.__sigchld.si_utime
+#define si_stime   __si_fields.__sigchld.si_stime
+#define si_value   __si_fields.__rt.si_sigval
+#define si_addr    __si_fields.__sigfault.si_addr
+#define si_band    __si_fields.__sigpoll.si_band
+
+#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 FPE_INTDIV 1
+#define FPE_INTOVF 2
+#define FPE_FLTDIV 3
+#define FPE_FLTOVF 4
+#define FPE_FLTUNT 5
+#define FPE_FLTRES 6
+#define FPE_FLTINV 7
+#define FPE_FLTSUB 8
+
+#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 SEGV_MAPERR 1
+#define SEGV_ACCERR 2
+
+#define BUS_ADRALN 1
+#define BUS_ADRERR 2
+#define BUS_OBJERR 3
+
+#define CLD_EXITED 1
+#define CLD_KILLED 2
+#define CLD_DUMPED 3
+#define CLD_TRAPPED 4
+#define CLD_STOPPED 5
+#define CLD_CONTINUED 6
+
+#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
+#define TRAP_BRKPT 1
+#define TRAP_TRACE 2
+#define POLL_IN 1
+#define POLL_OUT 2
+#define POLL_MSG 3
+#define POLL_ERR 4
+#define POLL_PRI 5
+#define POLL_HUP 6
+#define SS_ONSTACK    1
+#define SS_DISABLE    2
+#define MINSIGSTKSZ 2048
+#define SIGSTKSZ 8192
+#endif
+
+#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
+
+#define SIG_BLOCK     0
+#define SIG_UNBLOCK   1
+#define SIG_SETMASK   2
+
+#endif
+
+#ifdef _GNU_SOURCE
+#define NSIG      64
+#endif
+
+#define SIG_ERR  ((void (*)(int))-1)
+#define SIG_DFL  ((void (*)(int)) 0)
+#define SIG_IGN  ((void (*)(int)) 1)
+#define SIG_HOLD ((void (*)(int)) 2)
+
+#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   29
+#define SIGPWR    30
+#define SIGSYS    31
+#define SIGUNUSED SIGSYS