tile: add basic support for tilegx

This adds basic support for tile architecture.
Only static binaries, no ld.so or threading support.
Tested with qemu-tilegx only.

6 files changed, 457 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/tile/sys/cachectl.h b/libc/sysdeps/linux/tile/sys/cachectl.h
new file mode 100644
index 000000000..14ce52f47
--- /dev/null
+++ b/libc/sysdeps/linux/tile/sys/cachectl.h
@@ -0,0 +1,34 @@
+/* Copyright (C) 2011-2018 Free Software Foundation, Inc.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _SYS_CACHECTL_H
+#define _SYS_CACHECTL_H 1
+
+#include <features.h>
+
+/* Get the kernel definition for the op bits.  */
+#include <asm/cachectl.h>
+
+__BEGIN_DECLS
+
+#ifdef __USE_MISC
+extern int cacheflush (void *__addr, const int __nbytes, const int __op) __THROW;
+#endif
+extern int _flush_cache (char *__addr, const int __nbytes, const int __op) __THROW;
+
+__END_DECLS
+
+#endif /* sys/cachectl.h */
diff --git a/libc/sysdeps/linux/tile/sys/procfs.h b/libc/sysdeps/linux/tile/sys/procfs.h
new file mode 100644
index 000000000..8af94bab7
--- /dev/null
+++ b/libc/sysdeps/linux/tile/sys/procfs.h
@@ -0,0 +1,126 @@
+/* Copyright (C) 2011-2018 Free Software Foundation, Inc.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#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>
+
+#define __need_int_reg_t
+#include <arch/abi.h>
+
+__BEGIN_DECLS
+
+/* Type for a general-purpose register.  */
+typedef __uint_reg_t elf_greg_t;
+
+/* And the whole bunch of them.  We could have used `struct pt_regs'
+   from <asm/ptrace.h> 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  64
+#define ELF_NFPREG 0
+typedef elf_greg_t elf_gregset_t[ELF_NGREG];
+typedef elf_greg_t elf_fpregset_t[ELF_NFPREG];
+
+/* 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 int pr_uid;
+    unsigned 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;
+
+/* Provide dummy declaration here; we don't have FP registers. */
+typedef elf_fpregset_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/tile/sys/ptrace.h b/libc/sysdeps/linux/tile/sys/ptrace.h
new file mode 100644
index 000000000..94fe60f6f
--- /dev/null
+++ b/libc/sysdeps/linux/tile/sys/ptrace.h
@@ -0,0 +1,198 @@
+/* `ptrace' debugger support interface.  Linux/Tile version.
+   Copyright (C) 2011-2018 Free Software Foundation, Inc.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _SYS_PTRACE_H
+#define _SYS_PTRACE_H	1
+
+#include <features.h>
+#include <bits/types.h>
+
+__BEGIN_DECLS
+
+/* Type of the REQUEST argument to `ptrace.'  */
+enum __ptrace_request
+{
+  /* Indicate that the process making this request should be traced.
+     All signals received by this process can be intercepted by its
+     parent, and its parent can use the other `ptrace' requests.  */
+  PTRACE_TRACEME = 0,
+#define PT_TRACE_ME PTRACE_TRACEME
+
+  /* Return the word in the process's text space at address ADDR.  */
+  PTRACE_PEEKTEXT = 1,
+#define PT_READ_I PTRACE_PEEKTEXT
+
+  /* Return the word in the process's data space at address ADDR.  */
+  PTRACE_PEEKDATA = 2,
+#define PT_READ_D PTRACE_PEEKDATA
+
+  /* Return the word in the process's user area at offset ADDR.  */
+  PTRACE_PEEKUSER = 3,
+#define PT_READ_U PTRACE_PEEKUSER
+
+  /* Write the word DATA into the process's text space at address ADDR.  */
+  PTRACE_POKETEXT = 4,
+#define PT_WRITE_I PTRACE_POKETEXT
+
+  /* Write the word DATA into the process's data space at address ADDR.  */
+  PTRACE_POKEDATA = 5,
+#define PT_WRITE_D PTRACE_POKEDATA
+
+  /* Write the word DATA into the process's user area at offset ADDR.  */
+  PTRACE_POKEUSER = 6,
+#define PT_WRITE_U PTRACE_POKEUSER
+
+  /* Continue the process.  */
+  PTRACE_CONT = 7,
+#define PT_CONTINUE PTRACE_CONT
+
+  /* Kill the process.  */
+  PTRACE_KILL = 8,
+#define PT_KILL PTRACE_KILL
+
+  /* Single step the process.  */
+  PTRACE_SINGLESTEP = 9,
+#define PT_STEP PTRACE_SINGLESTEP
+
+  /* Get all general purpose registers used by a processes. */
+   PTRACE_GETREGS = 12,
+#define PT_GETREGS PTRACE_GETREGS
+
+  /* Set all general purpose registers used by a processes. */
+   PTRACE_SETREGS = 13,
+#define PT_SETREGS PTRACE_SETREGS
+
+  /* Attach to a process that is already running. */
+  PTRACE_ATTACH = 16,
+#define PT_ATTACH PTRACE_ATTACH
+
+  /* Detach from a process attached to with PTRACE_ATTACH.  */
+  PTRACE_DETACH = 17,
+#define PT_DETACH PTRACE_DETACH
+
+  /* Continue and stop at the next entry to or return from syscall.  */
+  PTRACE_SYSCALL = 24,
+#define PT_SYSCALL PTRACE_SYSCALL
+
+  /* Set ptrace filter options.  */
+  PTRACE_SETOPTIONS = 0x4200,
+#define PT_SETOPTIONS PTRACE_SETOPTIONS
+
+  /* Get last ptrace message.  */
+  PTRACE_GETEVENTMSG = 0x4201,
+#define PT_GETEVENTMSG PTRACE_GETEVENTMSG
+
+  /* Get siginfo for process.  */
+  PTRACE_GETSIGINFO = 0x4202,
+#define PT_GETSIGINFO PTRACE_GETSIGINFO
+
+  /* Set new siginfo for process.  */
+  PTRACE_SETSIGINFO = 0x4203,
+#define PT_SETSIGINFO PTRACE_SETSIGINFO
+
+  /* Set register content.  */
+  PTRACE_SETREGSET = 0x4205,
+#define PTRACE_SETREGSET PTRACE_SETREGSET
+
+  /* Like PTRACE_ATTACH, but do not force tracee to trap and do not affect
+     signal or group stop state.  */
+  PTRACE_SEIZE = 0x4206,
+#define PTRACE_SEIZE PTRACE_SEIZE
+
+  /* Trap seized tracee.  */
+  PTRACE_INTERRUPT = 0x4207,
+#define PTRACE_INTERRUPT PTRACE_INTERRUPT
+
+  /* Wait for next group event.  */
+  PTRACE_LISTEN = 0x4208,
+#define PTRACE_LISTEN PTRACE_LISTEN
+
+  /* Retrieve siginfo_t structures without removing signals from a queue.  */
+  PTRACE_PEEKSIGINFO = 0x4209,
+#define PTRACE_PEEKSIGINFO PTRACE_PEEKSIGINFO
+
+  /* Get the mask of blocked signals.  */
+  PTRACE_GETSIGMASK = 0x420a,
+#define PTRACE_GETSIGMASK PTRACE_GETSIGMASK
+
+  /* Change the mask of blocked signals.  */
+  PTRACE_SETSIGMASK = 0x420b,
+#define PTRACE_SETSIGMASK PTRACE_SETSIGMASK
+
+  /* Get seccomp BPF filters.  */
+  PTRACE_SECCOMP_GET_FILTER = 0x420c
+#define PTRACE_SECCOMP_GET_FILTER PTRACE_SECCOMP_GET_FILTER
+};
+
+/* Options set using PTRACE_SETOPTIONS.  */
+enum __ptrace_setoptions
+{
+  PTRACE_O_TRACESYSGOOD	= 0x00000001,
+  PTRACE_O_TRACEFORK	= 0x00000002,
+  PTRACE_O_TRACEVFORK	= 0x00000004,
+  PTRACE_O_TRACECLONE	= 0x00000008,
+  PTRACE_O_TRACEEXEC	= 0x00000010,
+  PTRACE_O_TRACEVFORKDONE = 0x00000020,
+  PTRACE_O_TRACEEXIT	= 0x00000040,
+  PTRACE_O_TRACESECCOMP	= 0x00000080,
+  PTRACE_O_EXITKILL	= 0x00100000,
+  PTRACE_O_SUSPEND_SECCOMP = 0x00200000,
+  PTRACE_O_MASK		= 0x003000ff
+};
+
+enum __ptrace_eventcodes
+{
+/* Wait extended result codes for the above trace options.  */
+  PTRACE_EVENT_FORK	= 1,
+  PTRACE_EVENT_VFORK	= 2,
+  PTRACE_EVENT_CLONE	= 3,
+  PTRACE_EVENT_EXEC	= 4,
+  PTRACE_EVENT_VFORK_DONE = 5,
+  PTRACE_EVENT_EXIT	= 6,
+  PTRACE_EVENT_SECCOMP  = 7,
+/* Extended result codes enabled by means other than options.  */
+  PTRACE_EVENT_STOP	= 128
+};
+
+/* Arguments for PTRACE_PEEKSIGINFO.  */
+struct __ptrace_peeksiginfo_args
+{
+  __uint64_t off;	/* From which siginfo to start.  */
+  __uint32_t flags;	/* Flags for peeksiginfo.  */
+  __int32_t nr;		/* How many siginfos to take.  */
+};
+
+enum __ptrace_peeksiginfo_flags
+{
+  /* Read signals from a shared (process wide) queue.  */
+  PTRACE_PEEKSIGINFO_SHARED = (1 << 0)
+};
+
+/* Perform process tracing functions.  REQUEST is one of the values
+   above, and determines the action to be taken.
+   For all requests except PTRACE_TRACEME, PID specifies the process to be
+   traced.
+
+   PID and the other arguments described above for the various requests should
+   appear (those that are used for the particular request) as:
+     pid_t PID, void *ADDR, int DATA, void *ADDR2
+   after REQUEST.  */
+extern long int ptrace (enum __ptrace_request __request, ...) __THROW;
+
+__END_DECLS
+
+#endif /* _SYS_PTRACE_H */
diff --git a/libc/sysdeps/linux/tile/sys/reg.h b/libc/sysdeps/linux/tile/sys/reg.h
new file mode 100644
index 000000000..1ab17ce82
--- /dev/null
+++ b/libc/sysdeps/linux/tile/sys/reg.h
@@ -0,0 +1,2 @@
+/* The traditional purpose of "sys/reg.h" is satisfied by "arch/abi.h". */
+#include <arch/abi.h>
diff --git a/libc/sysdeps/linux/tile/sys/ucontext.h b/libc/sysdeps/linux/tile/sys/ucontext.h
new file mode 100644
index 000000000..ed2c27b58
--- /dev/null
+++ b/libc/sysdeps/linux/tile/sys/ucontext.h
@@ -0,0 +1,96 @@
+/* Copyright (C) 2011-2018 Free Software Foundation, Inc.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _SYS_UCONTEXT_H
+#define _SYS_UCONTEXT_H	1
+
+#include <features.h>
+#include <signal.h>
+#include <bits/sigcontext.h>
+
+#ifdef __USE_MISC
+# define __ctx(fld) fld
+#else
+# define __ctx(fld) __ ## fld
+#endif
+
+#ifdef __USE_MISC
+/* Get register type and register names. */
+# include <arch/abi.h>
+
+
+/* Type for general register.  */
+typedef uint_reg_t greg_t;
+
+/* Number of general registers.  Must agree with <asm/ptrace.h>. */
+# define NGREG	64
+
+/* Container for all general registers.  */
+typedef greg_t gregset_t[NGREG];
+#endif
+
+#ifdef __USE_GNU
+/* Names for interesting registers in the `gregset_t' array.  */
+enum
+{
+  /* ... r0 through r51 are just 0 through 51 ... */
+  REG_FP = TREG_FP,
+# define REG_FP		REG_FP
+  REG_TP = TREG_TP,
+# define REG_TP		REG_TP
+  REG_SP = TREG_SP,
+# define REG_SP		REG_SP
+  REG_LR = TREG_LR,
+# define REG_LR		REG_LR
+};
+#endif
+
+#define __need_int_reg_t
+#include <arch/abi.h>
+
+/* A machine context is exactly a sigcontext.  */
+typedef struct
+  {
+    __extension__ union
+      {
+	__uint_reg_t __ctx(gregs)[56];
+	__extension__ struct
+	  {
+	    __uint_reg_t __ctx(__gregs)[53];
+	    __uint_reg_t __ctx(tp);
+	    __uint_reg_t __ctx(sp);
+	    __uint_reg_t __ctx(lr);
+	  };
+      };
+    __uint_reg_t __ctx(pc);
+    __uint_reg_t __ctx(ics);
+    __uint_reg_t __ctx(faultnum);
+    __uint_reg_t __glibc_reserved1[5];
+  } mcontext_t;
+
+/* Userlevel context.  */
+typedef struct ucontext_t
+  {
+    unsigned long int __ctx(uc_flags);
+    struct ucontext_t *uc_link;
+    stack_t uc_stack;
+    mcontext_t uc_mcontext;
+    sigset_t uc_sigmask;
+  } ucontext_t;
+
+#undef __ctx
+
+#endif /* sys/ucontext.h */
diff --git a/libc/sysdeps/linux/tile/sys/user.h b/libc/sysdeps/linux/tile/sys/user.h
new file mode 100644
index 000000000..c871f1a03
--- /dev/null
+++ b/libc/sysdeps/linux/tile/sys/user.h
@@ -0,0 +1 @@
+/* This file is not needed, but in practice gdb might try to include it.  */