ARC port to uClibc

For this port, I would like to give due credit to:

- Folks from Codito technologies (Sameer, Amit, Kanika, Ramana,...)
   who did the very first port

- ARC UK from 2007-2009 (Joern, Irfan, Khurram, Phil...

- Late Brendan Kehoe (may he RIP)

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

4 files changed, 174 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/arc/sys/cachectl.h b/libc/sysdeps/linux/arc/sys/cachectl.h
new file mode 100644
index 000000000..e9a783bdc
--- /dev/null
+++ b/libc/sysdeps/linux/arc/sys/cachectl.h
@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef _SYS_CACHECTL_H
+#define _SYS_CACHECTL_H	1
+
+/*
+ * Get the kernel definition for the flag bits
+ */
+#include <asm/cachectl.h>
+
+__BEGIN_DECLS
+
+extern int cacheflush(void *addr, int nbytes, int flags);
+
+__END_DECLS
+
+#endif	/* sys/cachectl.h */
diff --git a/libc/sysdeps/linux/arc/sys/procfs.h b/libc/sysdeps/linux/arc/sys/procfs.h
new file mode 100755
index 000000000..44676e197
--- /dev/null
+++ b/libc/sysdeps/linux/arc/sys/procfs.h
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef _SYS_PROCFS_H
+#define _SYS_PROCFS_H	1
+
+/* This is somewhat modelled after the file of the same name on SVR4
+   systems.  It provides a definition of the core file format for ELF
+   used on Linux.  It doesn't have anything to do with the /proc file
+   system, even though Linux has one.
+
+   Anyway, the whole purpose of this file is for GDB and GDB only.
+   Don't read too much into it.  Don't use it for anything other than
+   GDB unless you know what you are doing.  */
+
+#include <features.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/user.h>
+
+__BEGIN_DECLS
+
+/* Type for a general-purpose register.  */
+typedef unsigned long elf_greg_t;
+
+/* And the whole bunch of them.  We could have used `struct
+   user_regs' directly in the typedef, but tradition says that
+   the register set is an array, which does have some peculiar
+   semantics, so leave it that way.  */
+#define ELF_NGREG 20
+typedef elf_greg_t elf_gregset_t[ELF_NGREG];
+
+/* Signal info.  */
+struct elf_siginfo
+  {
+    int si_signo;			/* Signal number.  */
+    int si_code;			/* Extra code.  */
+    int si_errno;			/* Errno.  */
+  };
+
+/* Definitions to generate Intel SVR4-like core files.  These mostly
+   have the same names as the SVR4 types with "elf_" tacked on the
+   front to prevent clashes with Linux definitions, and the typedef
+   forms have been avoided.  This is mostly like the SVR4 structure,
+   but more Linuxy, with things that Linux does not support and which
+   GDB doesn't really use excluded.  */
+
+struct elf_prstatus
+  {
+    struct elf_siginfo pr_info;		/* Info associated with signal.  */
+    short int pr_cursig;		/* Current signal.  */
+    unsigned long int pr_sigpend;	/* Set of pending signals.  */
+    unsigned long int pr_sighold;	/* Set of held signals.  */
+    __pid_t pr_pid;
+    __pid_t pr_ppid;
+    __pid_t pr_pgrp;
+    __pid_t pr_sid;
+    struct timeval pr_utime;		/* User time.  */
+    struct timeval pr_stime;		/* System time.  */
+    struct timeval pr_cutime;		/* Cumulative user time.  */
+    struct timeval pr_cstime;		/* Cumulative system time.  */
+    elf_gregset_t pr_reg;		/* GP registers.  */
+    int pr_fpvalid;			/* True if math copro being used.  */
+  };
+
+
+#define ELF_PRARGSZ     (80)    /* Number of chars for args.  */
+
+struct elf_prpsinfo
+  {
+    char pr_state;			/* Numeric process state.  */
+    char pr_sname;			/* Char for pr_state.  */
+    char pr_zomb;			/* Zombie.  */
+    char pr_nice;			/* Nice val.  */
+    unsigned long int pr_flag;		/* Flags.  */
+    unsigned short int pr_uid;
+    unsigned short int pr_gid;
+    int pr_pid, pr_ppid, pr_pgrp, pr_sid;
+    /* Lots missing */
+    char pr_fname[16];			/* Filename of executable.  */
+    char pr_psargs[ELF_PRARGSZ];	/* Initial part of arg list.  */
+  };
+
+/* The rest of this file provides the types for emulation of the
+   Solaris <proc_service.h> interfaces that should be implemented by
+   users of libthread_db.  */
+
+/* Addresses.  */
+typedef void *psaddr_t;
+
+/* Register sets.  Linux has different names.  */
+typedef elf_gregset_t prgregset_t;
+typedef elf_gregset_t prfpregset_t;
+
+/* We don't have any differences between processes and threads,
+   therefore have only one PID type.  */
+typedef __pid_t lwpid_t;
+
+/* Process status and info.  In the end we do provide typedefs for them.  */
+typedef struct elf_prstatus prstatus_t;
+typedef struct elf_prpsinfo prpsinfo_t;
+
+__END_DECLS
+
+#endif	/* sys/procfs.h */
diff --git a/libc/sysdeps/linux/arc/sys/ucontext.h b/libc/sysdeps/linux/arc/sys/ucontext.h
new file mode 100755
index 000000000..23d928562
--- /dev/null
+++ b/libc/sysdeps/linux/arc/sys/ucontext.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef _SYS_UCONTEXT_H
+#define _SYS_UCONTEXT_H	1
+
+#include <features.h>
+#include <signal.h>
+#include <bits/sigcontext.h>
+
+typedef struct ucontext {
+	unsigned long	  uc_flags;
+	struct ucontext  *uc_link;
+	stack_t		  uc_stack;
+	struct sigcontext uc_mcontext;
+	sigset_t	  uc_sigmask;	/* mask last for extensibility */
+} ucontext_t;
+
+#endif /* sys/ucontext.h */
diff --git a/libc/sysdeps/linux/arc/sys/user.h b/libc/sysdeps/linux/arc/sys/user.h
new file mode 100755
index 000000000..e340074ce
--- /dev/null
+++ b/libc/sysdeps/linux/arc/sys/user.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef _SYS_USER_H
+#define _SYS_USER_H	1
+
+/* The whole purpose of this file is for GDB and GDB only.  Don't read
+   too much into it.  Don't use it for anything other than GDB unless
+   you know what you are doing.  */
+
+
+/* Actually apps like strace also expect a struct user, so it's better to
+ * have a dummy implementation
+ */
+
+struct user {
+	int dummy;
+};
+
+#endif  /* sys/user.h */