diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/aarch64/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/aarch64/sysdep.h | 297 |
1 files changed, 0 insertions, 297 deletions
diff --git a/sysdeps/unix/sysv/linux/aarch64/sysdep.h b/sysdeps/unix/sysv/linux/aarch64/sysdep.h deleted file mode 100644 index 4bb9112d62..0000000000 --- a/sysdeps/unix/sysv/linux/aarch64/sysdep.h +++ /dev/null @@ -1,297 +0,0 @@ -/* Copyright (C) 2005-2017 Free Software Foundation, Inc. - - This file is part of the GNU C Library. - - 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 _LINUX_AARCH64_SYSDEP_H -#define _LINUX_AARCH64_SYSDEP_H 1 - -#include <sysdeps/unix/sysdep.h> -#include <sysdeps/aarch64/sysdep.h> -#include <sysdeps/unix/sysv/linux/generic/sysdep.h> - -/* Defines RTLD_PRIVATE_ERRNO and USE_DL_SYSINFO. */ -#include <dl-sysdep.h> - -#include <tls.h> - -/* In order to get __set_errno() definition in INLINE_SYSCALL. */ -#ifndef __ASSEMBLER__ -#include <errno.h> -#endif - -/* For Linux we can use the system call table in the header file - /usr/include/asm/unistd.h - of the kernel. But these symbols do not follow the SYS_* syntax - so we have to redefine the `SYS_ify' macro here. */ -#undef SYS_ify -#define SYS_ify(syscall_name) (__NR_##syscall_name) - -#ifdef __ASSEMBLER__ - -/* Linux uses a negative return value to indicate syscall errors, - unlike most Unices, which use the condition codes' carry flag. - - Since version 2.1 the return value of a system call might be - negative even if the call succeeded. E.g., the `lseek' system call - might return a large offset. Therefore we must not anymore test - for < 0, but test for a real error by making sure the value in R0 - is a real error number. Linus said he will make sure the no syscall - returns a value in -1 .. -4095 as a valid result so we can safely - test with -4095. */ - -# undef PSEUDO -# define PSEUDO(name, syscall_name, args) \ - .text; \ - ENTRY (name); \ - DO_CALL (syscall_name, args); \ - cmn x0, #4095; \ - b.cs .Lsyscall_error; - -# undef PSEUDO_END -# define PSEUDO_END(name) \ - SYSCALL_ERROR_HANDLER \ - END (name) - -# undef PSEUDO_NOERRNO -# define PSEUDO_NOERRNO(name, syscall_name, args) \ - .text; \ - ENTRY (name); \ - DO_CALL (syscall_name, args); - -# undef PSEUDO_END_NOERRNO -# define PSEUDO_END_NOERRNO(name) \ - END (name) - -# define ret_NOERRNO ret - -/* The function has to return the error code. */ -# undef PSEUDO_ERRVAL -# define PSEUDO_ERRVAL(name, syscall_name, args) \ - .text; \ - ENTRY (name) \ - DO_CALL (syscall_name, args); \ - neg x0, x0 - -# undef PSEUDO_END_ERRVAL -# define PSEUDO_END_ERRVAL(name) \ - END (name) - -# define ret_ERRVAL ret - -# if !IS_IN (libc) -# define SYSCALL_ERROR .Lsyscall_error -# if RTLD_PRIVATE_ERRNO -# define SYSCALL_ERROR_HANDLER \ -.Lsyscall_error: \ - adrp x1, C_SYMBOL_NAME(rtld_errno); \ - neg w0, w0; \ - str w0, [x1, :lo12:C_SYMBOL_NAME(rtld_errno)]; \ - mov x0, -1; \ - RET; -# else - -# define SYSCALL_ERROR_HANDLER \ -.Lsyscall_error: \ - adrp x1, :gottprel:errno; \ - neg w2, w0; \ - ldr PTR_REG(1), [x1, :gottprel_lo12:errno]; \ - mrs x3, tpidr_el0; \ - mov x0, -1; \ - str w2, [x1, x3]; \ - RET; -# endif -# else -# define SYSCALL_ERROR __syscall_error -# define SYSCALL_ERROR_HANDLER \ -.Lsyscall_error: \ - b __syscall_error; -# endif - -/* Linux takes system call args in registers: - syscall number x8 - arg 1 x0 - arg 2 x1 - arg 3 x2 - arg 4 x3 - arg 5 x4 - arg 6 x5 - arg 7 x6 - - The compiler is going to form a call by coming here, through PSEUDO, with - arguments - syscall number in the DO_CALL macro - arg 1 x0 - arg 2 x1 - arg 3 x2 - arg 4 x3 - arg 5 x4 - arg 6 x5 - arg 7 x6 - -*/ - -# undef DO_CALL -# define DO_CALL(syscall_name, args) \ - mov x8, SYS_ify (syscall_name); \ - svc 0 - -#else /* not __ASSEMBLER__ */ - - -/* List of system calls which are supported as vsyscalls. */ -# define HAVE_CLOCK_GETRES_VSYSCALL 1 -# define HAVE_CLOCK_GETTIME_VSYSCALL 1 -# define HAVE_GETTIMEOFDAY_VSYSCALL 1 - -/* Previously AArch64 used the generic version without the libc_hidden_def - which lead in a non existent __send symbol in libc.so. */ -# undef HAVE_INTERNAL_SEND_SYMBOL - -/* Define a macro which expands into the inline wrapper code for a system - call. */ -# undef INLINE_SYSCALL -# define INLINE_SYSCALL(name, nr, args...) \ - ({ unsigned long _sys_result = INTERNAL_SYSCALL (name, , nr, args); \ - if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (_sys_result, ), 0))\ - { \ - __set_errno (INTERNAL_SYSCALL_ERRNO (_sys_result, )); \ - _sys_result = (unsigned long) -1; \ - } \ - (long) _sys_result; }) - -# undef INTERNAL_SYSCALL_DECL -# define INTERNAL_SYSCALL_DECL(err) do { } while (0) - -# undef INTERNAL_SYSCALL_RAW -# define INTERNAL_SYSCALL_RAW(name, err, nr, args...) \ - ({ long _sys_result; \ - { \ - LOAD_ARGS_##nr (args) \ - register long _x8 asm ("x8") = (name); \ - asm volatile ("svc 0 // syscall " # name \ - : "=r" (_x0) : "r"(_x8) ASM_ARGS_##nr : "memory"); \ - _sys_result = _x0; \ - } \ - _sys_result; }) - -# undef INTERNAL_SYSCALL -# define INTERNAL_SYSCALL(name, err, nr, args...) \ - INTERNAL_SYSCALL_RAW(SYS_ify(name), err, nr, args) - -# undef INTERNAL_SYSCALL_AARCH64 -# define INTERNAL_SYSCALL_AARCH64(name, err, nr, args...) \ - INTERNAL_SYSCALL_RAW(__ARM_NR_##name, err, nr, args) - -# undef INTERNAL_SYSCALL_ERROR_P -# define INTERNAL_SYSCALL_ERROR_P(val, err) \ - ((unsigned long) (val) >= (unsigned long) -4095) - -# undef INTERNAL_SYSCALL_ERRNO -# define INTERNAL_SYSCALL_ERRNO(val, err) (-(val)) - -# define LOAD_ARGS_0() \ - register long _x0 asm ("x0"); -# define LOAD_ARGS_1(x0) \ - long _x0tmp = (long) (x0); \ - LOAD_ARGS_0 () \ - _x0 = _x0tmp; -# define LOAD_ARGS_2(x0, x1) \ - long _x1tmp = (long) (x1); \ - LOAD_ARGS_1 (x0) \ - register long _x1 asm ("x1") = _x1tmp; -# define LOAD_ARGS_3(x0, x1, x2) \ - long _x2tmp = (long) (x2); \ - LOAD_ARGS_2 (x0, x1) \ - register long _x2 asm ("x2") = _x2tmp; -# define LOAD_ARGS_4(x0, x1, x2, x3) \ - long _x3tmp = (long) (x3); \ - LOAD_ARGS_3 (x0, x1, x2) \ - register long _x3 asm ("x3") = _x3tmp; -# define LOAD_ARGS_5(x0, x1, x2, x3, x4) \ - long _x4tmp = (long) (x4); \ - LOAD_ARGS_4 (x0, x1, x2, x3) \ - register long _x4 asm ("x4") = _x4tmp; -# define LOAD_ARGS_6(x0, x1, x2, x3, x4, x5) \ - long _x5tmp = (long) (x5); \ - LOAD_ARGS_5 (x0, x1, x2, x3, x4) \ - register long _x5 asm ("x5") = _x5tmp; -# define LOAD_ARGS_7(x0, x1, x2, x3, x4, x5, x6)\ - long _x6tmp = (long) (x6); \ - LOAD_ARGS_6 (x0, x1, x2, x3, x4, x5) \ - register long _x6 asm ("x6") = _x6tmp; - -# define ASM_ARGS_0 -# define ASM_ARGS_1 , "r" (_x0) -# define ASM_ARGS_2 ASM_ARGS_1, "r" (_x1) -# define ASM_ARGS_3 ASM_ARGS_2, "r" (_x2) -# define ASM_ARGS_4 ASM_ARGS_3, "r" (_x3) -# define ASM_ARGS_5 ASM_ARGS_4, "r" (_x4) -# define ASM_ARGS_6 ASM_ARGS_5, "r" (_x5) -# define ASM_ARGS_7 ASM_ARGS_6, "r" (_x6) - -# undef INTERNAL_SYSCALL_NCS -# define INTERNAL_SYSCALL_NCS(number, err, nr, args...) \ - INTERNAL_SYSCALL_RAW (number, err, nr, args) - -#endif /* __ASSEMBLER__ */ - -/* Pointer mangling is supported for AArch64. */ -#if (IS_IN (rtld) || \ - (!defined SHARED && (IS_IN (libc) \ - || IS_IN (libpthread)))) -# ifdef __ASSEMBLER__ -/* Note, dst, src, guard, and tmp are all register numbers rather than - register names so they will work with both ILP32 and LP64. */ -# define PTR_MANGLE(dst, src, guard, tmp) \ - LDST_PCREL (ldr, guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard_local)); \ - PTR_MANGLE2 (dst, src, guard) -/* Use PTR_MANGLE2 for efficiency if guard is already loaded. */ -# define PTR_MANGLE2(dst, src, guard)\ - eor x##dst, x##src, x##guard -# define PTR_DEMANGLE(dst, src, guard, tmp)\ - PTR_MANGLE (dst, src, guard, tmp) -# define PTR_DEMANGLE2(dst, src, guard)\ - PTR_MANGLE2 (dst, src, guard) -# else -extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden; -# define PTR_MANGLE(var) \ - (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local) -# define PTR_DEMANGLE(var) PTR_MANGLE (var) -# endif -#else -# ifdef __ASSEMBLER__ -/* Note, dst, src, guard, and tmp are all register numbers rather than - register names so they will work with both ILP32 and LP64. */ -# define PTR_MANGLE(dst, src, guard, tmp) \ - LDST_GLOBAL (ldr, guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard)); \ - PTR_MANGLE2 (dst, src, guard) -/* Use PTR_MANGLE2 for efficiency if guard is already loaded. */ -# define PTR_MANGLE2(dst, src, guard)\ - eor x##dst, x##src, x##guard -# define PTR_DEMANGLE(dst, src, guard, tmp)\ - PTR_MANGLE (dst, src, guard, tmp) -# define PTR_DEMANGLE2(dst, src, guard)\ - PTR_MANGLE2 (dst, src, guard) -# else -extern uintptr_t __pointer_chk_guard attribute_relro; -# define PTR_MANGLE(var) \ - (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard) -# define PTR_DEMANGLE(var) PTR_MANGLE (var) -# endif -#endif - -#endif /* linux/aarch64/sysdep.h */ |