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Diffstat (limited to 'ports/sysdeps/unix/sysv/linux/tile/sysdep.h')
-rw-r--r--ports/sysdeps/unix/sysv/linux/tile/sysdep.h223
1 files changed, 223 insertions, 0 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/tile/sysdep.h b/ports/sysdeps/unix/sysv/linux/tile/sysdep.h
new file mode 100644
index 0000000000..b2c018f83a
--- /dev/null
+++ b/ports/sysdeps/unix/sysv/linux/tile/sysdep.h
@@ -0,0 +1,223 @@
+/* Copyright (C) 2011 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
+
+ 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/>. */
+
+#include <asm/unistd.h>
+#include <sysdeps/tile/sysdep.h>
+#include <sysdeps/unix/sysv/linux/generic/sysdep.h>
+#include <sys/syscall.h>
+
+#undef SYS_ify
+#define SYS_ify(syscall_name) __NR_##syscall_name
+
+
+#ifdef __ASSEMBLER__
+
+/* The actual implementation of doing a syscall. */
+#define DO_CALL(syscall_name, args) \
+ moveli TREG_SYSCALL_NR_NAME, SYS_ify(syscall_name); \
+ swint1
+
+/* TILE Linux returns the result in r0 (or a negative errno).
+ The kernel "owns" the code to decide if a given value is an error,
+ and puts errno in r1 if so, or otherwise zero. */
+#define PSEUDO(name, syscall_name, args) \
+ ENTRY (name); \
+ DO_CALL(syscall_name, args); \
+ BNEZ r1, 0f
+
+#define ret jrp lr
+
+#ifndef PIC
+/* For static code, on error jump to __syscall_error directly. */
+# define SYSCALL_ERROR_NAME __syscall_error
+#elif !defined NOT_IN_libc || defined IS_IN_libpthread
+/* Use the internal name for libc/libpthread shared objects. */
+# define SYSCALL_ERROR_NAME __GI___syscall_error
+#else
+/* Otherwise, on error do a full PLT jump. */
+# define SYSCALL_ERROR_NAME plt(__syscall_error)
+#endif
+
+#define PSEUDO_END(name) \
+0: \
+ j SYSCALL_ERROR_NAME; \
+ END (name)
+
+#define PSEUDO_NOERRNO(name, syscall_name, args) \
+ ENTRY (name); \
+ DO_CALL(syscall_name, args)
+
+#define ret_NOERRNO jrp lr
+
+#define PSEUDO_END_NOERRNO(name) \
+ END (name)
+
+/* Convenience wrappers. */
+#define SYSCALL__(name, args) PSEUDO (__##name, name, args)
+#define SYSCALL(name, args) PSEUDO (name, name, args)
+
+#else /* not __ASSEMBLER__ */
+
+#include <errno.h>
+
+/* Define a macro which expands inline into the wrapper code for a system
+ call. */
+# undef INLINE_SYSCALL
+# define INLINE_SYSCALL(name, nr, args...) \
+ ({ \
+ INTERNAL_SYSCALL_DECL (err); \
+ unsigned long val = INTERNAL_SYSCALL (name, err, nr, args); \
+ if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (val, err), 0)) \
+ { \
+ __set_errno (INTERNAL_SYSCALL_ERRNO (val, err)); \
+ val = -1; \
+ } \
+ (long) val; })
+
+#undef INTERNAL_SYSCALL
+#define INTERNAL_SYSCALL(name, err, nr, args...) \
+ internal_syscall##nr (SYS_ify (name), err, args)
+
+#undef INTERNAL_SYSCALL_NCS
+#define INTERNAL_SYSCALL_NCS(number, err, nr, args...) \
+ internal_syscall##nr (number, err, args)
+
+#undef INTERNAL_SYSCALL_DECL
+#define INTERNAL_SYSCALL_DECL(err) int err
+
+#undef INTERNAL_SYSCALL_ERROR_P
+#define INTERNAL_SYSCALL_ERROR_P(val, err) ({ (void) (val); (err) != 0; })
+
+#undef INTERNAL_SYSCALL_ERRNO
+#define INTERNAL_SYSCALL_ERRNO(val, err) ({ (void) (val); (err); })
+
+#define internal_syscall0(num, err, dummy...) \
+ ({ \
+ long _sys_result, __SYSCALL_CLOBBER_DECLS; \
+ __asm__ __volatile__ ( \
+ "swint1" \
+ : "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS \
+ : "R10" (num) \
+ : __SYSCALL_CLOBBERS); \
+ _sys_result; \
+ })
+
+#define internal_syscall1(num, err, arg0) \
+ ({ \
+ long _sys_result, __SYSCALL_CLOBBER_DECLS; \
+ __asm__ __volatile__ ( \
+ "swint1" \
+ : "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS \
+ : "R10" (num), "R00" (arg0) \
+ : __SYSCALL_CLOBBERS); \
+ _sys_result; \
+ })
+
+#define internal_syscall2(num, err, arg0, arg1) \
+ ({ \
+ long _sys_result, __SYSCALL_CLOBBER_DECLS; \
+ __asm__ __volatile__ ( \
+ "swint1" \
+ : "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS \
+ : "R10" (num), "R00" (arg0), "R01" (arg1) \
+ : __SYSCALL_CLOBBERS); \
+ _sys_result; \
+ })
+
+#define internal_syscall3(num, err, arg0, arg1, arg2) \
+ ({ \
+ long _sys_result, __SYSCALL_CLOBBER_DECLS; \
+ __asm__ __volatile__ ( \
+ "swint1" \
+ : "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS \
+ : "R10" (num), "R00" (arg0), "R01" (arg1), "R02" (arg2) \
+ : __SYSCALL_CLOBBERS); \
+ _sys_result; \
+ })
+
+#define internal_syscall4(num, err, arg0, arg1, arg2, arg3) \
+ ({ \
+ long _sys_result, __SYSCALL_CLOBBER_DECLS; \
+ __asm__ __volatile__ ( \
+ "swint1" \
+ : "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS \
+ : "R10" (num), "R00" (arg0), "R01" (arg1), "R02" (arg2), \
+ "R03" (arg3) \
+ : __SYSCALL_CLOBBERS); \
+ _sys_result; \
+ })
+
+#define internal_syscall5(num, err, arg0, arg1, arg2, arg3, arg4) \
+ ({ \
+ long _sys_result, __SYSCALL_CLOBBER_DECLS; \
+ __asm__ __volatile__ ( \
+ "swint1" \
+ : "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS \
+ : "R10" (num), "R00" (arg0), "R01" (arg1), "R02" (arg2), \
+ "R03" (arg3), "R04" (arg4) \
+ : __SYSCALL_CLOBBERS); \
+ _sys_result; \
+ })
+
+#define internal_syscall6(num, err, arg0, arg1, arg2, arg3, arg4, arg5) \
+ ({ \
+ long _sys_result, __SYSCALL_CLOBBER_DECLS; \
+ __asm__ __volatile__ ( \
+ "swint1" \
+ : "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS \
+ : "R10" (num), "R00" (arg0), "R01" (arg1), "R02" (arg2), \
+ "R03" (arg3), "R04" (arg4), "R05" (arg5) \
+ : __SYSCALL_CLOBBERS); \
+ _sys_result; \
+ })
+
+#undef __SYSCALL_CLOBBERS
+#define __SYSCALL_CLOBBERS \
+ "r6", "r7", \
+ "r8", "r9", "r11", "r12", "r13", "r14", "r15", \
+ "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
+ "r24", "r25", "r26", "r27", "r28", "r29", "memory"
+
+/* gcc doesn't seem to allow an input operand to be clobbered, so we
+ fake it with dummy outputs. */
+#define __SYSCALL_CLOBBER_DECLS \
+ _clobber_r2, _clobber_r3, _clobber_r4, _clobber_r5, _clobber_r10
+
+#define __SYSCALL_CLOBBER_OUTPUTS \
+ "=R02" (_clobber_r2), "=R03" (_clobber_r3), "=R04" (_clobber_r4), \
+ "=R05" (_clobber_r5), "=R10" (_clobber_r10)
+
+#endif /* not __ASSEMBLER__ */
+
+/* Pointer mangling support. */
+#if defined NOT_IN_libc && defined IS_IN_rtld
+/* We cannot use the thread descriptor because in ld.so we use setjmp
+ earlier than the descriptor is initialized. */
+#else
+# ifdef __ASSEMBLER__
+# define PTR_MANGLE(reg, tmpreg) \
+ ADDLI_PTR tmpreg, pt, POINTER_GUARD; \
+ LD tmpreg, tmpreg; \
+ xor reg, tmpreg, reg
+# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
+# else
+# define PTR_MANGLE(var) \
+ (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
+# define PTR_DEMANGLE(var) PTR_MANGLE (var)
+# endif
+#endif
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