diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/x86_64/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/sysdep.h | 392 |
1 files changed, 0 insertions, 392 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/sysdep.h b/sysdeps/unix/sysv/linux/x86_64/sysdep.h deleted file mode 100644 index 880e496880..0000000000 --- a/sysdeps/unix/sysv/linux/x86_64/sysdep.h +++ /dev/null @@ -1,392 +0,0 @@ -/* Copyright (C) 2001-2017 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_X86_64_SYSDEP_H -#define _LINUX_X86_64_SYSDEP_H 1 - -/* There is some commonality. */ -#include <sysdeps/unix/sysv/linux/sysdep.h> -#include <sysdeps/unix/x86_64/sysdep.h> -#include <tls.h> - -#if IS_IN (rtld) -# include <dl-sysdep.h> /* Defines RTLD_PRIVATE_ERRNO. */ -#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 - -/* This is a kludge to make syscalls.list find these under the names - pread and pwrite, since some kernel headers define those names - and some define the *64 names for the same system calls. */ -#if !defined __NR_pread && defined __NR_pread64 -# define __NR_pread __NR_pread64 -#endif -#if !defined __NR_pwrite && defined __NR_pwrite64 -# define __NR_pwrite __NR_pwrite64 -#endif - -/* This is to help the old kernel headers where __NR_semtimedop is not - available. */ -#ifndef __NR_semtimedop -# define __NR_semtimedop 220 -#endif - - -#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 %eax - 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 savely - test with -4095. */ - -/* We don't want the label for the error handle to be global when we define - it here. */ -# ifdef PIC -# define SYSCALL_ERROR_LABEL 0f -# else -# define SYSCALL_ERROR_LABEL syscall_error -# endif - -# undef PSEUDO -# define PSEUDO(name, syscall_name, args) \ - .text; \ - ENTRY (name) \ - DO_CALL (syscall_name, args); \ - cmpq $-4095, %rax; \ - jae SYSCALL_ERROR_LABEL - -# 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 - -# undef PSEUDO_ERRVAL -# define PSEUDO_ERRVAL(name, syscall_name, args) \ - .text; \ - ENTRY (name) \ - DO_CALL (syscall_name, args); \ - negq %rax - -# undef PSEUDO_END_ERRVAL -# define PSEUDO_END_ERRVAL(name) \ - END (name) - -# define ret_ERRVAL ret - -# if defined PIC && defined RTLD_PRIVATE_ERRNO -# define SYSCALL_SET_ERRNO \ - lea rtld_errno(%rip), %RCX_LP; \ - neg %eax; \ - movl %eax, (%rcx) -# else -# if IS_IN (libc) -# define SYSCALL_ERROR_ERRNO __libc_errno -# else -# define SYSCALL_ERROR_ERRNO errno -# endif -# define SYSCALL_SET_ERRNO \ - movq SYSCALL_ERROR_ERRNO@GOTTPOFF(%rip), %rcx;\ - neg %eax; \ - movl %eax, %fs:(%rcx); -# endif - -# ifndef PIC -# define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */ -# else -# define SYSCALL_ERROR_HANDLER \ -0: \ - SYSCALL_SET_ERRNO; \ - or $-1, %RAX_LP; \ - ret; -# endif /* PIC */ - -/* The Linux/x86-64 kernel expects the system call parameters in - registers according to the following table: - - syscall number rax - arg 1 rdi - arg 2 rsi - arg 3 rdx - arg 4 r10 - arg 5 r8 - arg 6 r9 - - The Linux kernel uses and destroys internally these registers: - return address from - syscall rcx - eflags from syscall r11 - - Normal function call, including calls to the system call stub - functions in the libc, get the first six parameters passed in - registers and the seventh parameter and later on the stack. The - register use is as follows: - - system call number in the DO_CALL macro - arg 1 rdi - arg 2 rsi - arg 3 rdx - arg 4 rcx - arg 5 r8 - arg 6 r9 - - We have to take care that the stack is aligned to 16 bytes. When - called the stack is not aligned since the return address has just - been pushed. - - - Syscalls of more than 6 arguments are not supported. */ - -# undef DO_CALL -# define DO_CALL(syscall_name, args) \ - DOARGS_##args \ - movl $SYS_ify (syscall_name), %eax; \ - syscall; - -# define DOARGS_0 /* nothing */ -# define DOARGS_1 /* nothing */ -# define DOARGS_2 /* nothing */ -# define DOARGS_3 /* nothing */ -# define DOARGS_4 movq %rcx, %r10; -# define DOARGS_5 DOARGS_4 -# define DOARGS_6 DOARGS_5 - -#else /* !__ASSEMBLER__ */ -/* Define a macro which expands inline into the wrapper code for a system - call. */ -# undef INLINE_SYSCALL -# define INLINE_SYSCALL(name, nr, args...) \ - ({ \ - unsigned long int resultvar = INTERNAL_SYSCALL (name, , nr, args); \ - if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (resultvar, ))) \ - { \ - __set_errno (INTERNAL_SYSCALL_ERRNO (resultvar, )); \ - resultvar = (unsigned long int) -1; \ - } \ - (long int) resultvar; }) - -/* Define a macro with explicit types for arguments, which expands inline - into the wrapper code for a system call. It should be used when size - of any argument > size of long int. */ -# undef INLINE_SYSCALL_TYPES -# define INLINE_SYSCALL_TYPES(name, nr, args...) \ - ({ \ - unsigned long int resultvar = INTERNAL_SYSCALL_TYPES (name, , nr, args); \ - if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (resultvar, ))) \ - { \ - __set_errno (INTERNAL_SYSCALL_ERRNO (resultvar, )); \ - resultvar = (unsigned long int) -1; \ - } \ - (long int) resultvar; }) - -# undef INTERNAL_SYSCALL_DECL -# define INTERNAL_SYSCALL_DECL(err) do { } while (0) - -/* Registers clobbered by syscall. */ -# define REGISTERS_CLOBBERED_BY_SYSCALL "cc", "r11", "cx" - -# define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \ - ({ \ - unsigned long int resultvar; \ - LOAD_ARGS_##nr (args) \ - LOAD_REGS_##nr \ - asm volatile ( \ - "syscall\n\t" \ - : "=a" (resultvar) \ - : "0" (name) ASM_ARGS_##nr : "memory", REGISTERS_CLOBBERED_BY_SYSCALL); \ - (long int) resultvar; }) -# undef INTERNAL_SYSCALL -# define INTERNAL_SYSCALL(name, err, nr, args...) \ - INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, ##args) - -# define INTERNAL_SYSCALL_NCS_TYPES(name, err, nr, args...) \ - ({ \ - unsigned long int resultvar; \ - LOAD_ARGS_TYPES_##nr (args) \ - LOAD_REGS_TYPES_##nr (args) \ - asm volatile ( \ - "syscall\n\t" \ - : "=a" (resultvar) \ - : "0" (name) ASM_ARGS_##nr : "memory", REGISTERS_CLOBBERED_BY_SYSCALL); \ - (long int) resultvar; }) -# undef INTERNAL_SYSCALL_TYPES -# define INTERNAL_SYSCALL_TYPES(name, err, nr, args...) \ - INTERNAL_SYSCALL_NCS_TYPES (__NR_##name, err, nr, ##args) - -# undef INTERNAL_SYSCALL_ERROR_P -# define INTERNAL_SYSCALL_ERROR_P(val, err) \ - ((unsigned long int) (long int) (val) >= -4095L) - -# undef INTERNAL_SYSCALL_ERRNO -# define INTERNAL_SYSCALL_ERRNO(val, err) (-(val)) - -/* List of system calls which are supported as vsyscalls. */ -# define HAVE_CLOCK_GETTIME_VSYSCALL 1 -# define HAVE_GETTIMEOFDAY_VSYSCALL 1 -# define HAVE_GETCPU_VSYSCALL 1 - -# define LOAD_ARGS_0() -# define LOAD_REGS_0 -# define ASM_ARGS_0 - -# define LOAD_ARGS_TYPES_1(t1, a1) \ - t1 __arg1 = (t1) (a1); \ - LOAD_ARGS_0 () -# define LOAD_REGS_TYPES_1(t1, a1) \ - register t1 _a1 asm ("rdi") = __arg1; \ - LOAD_REGS_0 -# define ASM_ARGS_1 ASM_ARGS_0, "r" (_a1) -# define LOAD_ARGS_1(a1) \ - LOAD_ARGS_TYPES_1 (long int, a1) -# define LOAD_REGS_1 \ - LOAD_REGS_TYPES_1 (long int, a1) - -# define LOAD_ARGS_TYPES_2(t1, a1, t2, a2) \ - t2 __arg2 = (t2) (a2); \ - LOAD_ARGS_TYPES_1 (t1, a1) -# define LOAD_REGS_TYPES_2(t1, a1, t2, a2) \ - register t2 _a2 asm ("rsi") = __arg2; \ - LOAD_REGS_TYPES_1(t1, a1) -# define ASM_ARGS_2 ASM_ARGS_1, "r" (_a2) -# define LOAD_ARGS_2(a1, a2) \ - LOAD_ARGS_TYPES_2 (long int, a1, long int, a2) -# define LOAD_REGS_2 \ - LOAD_REGS_TYPES_2 (long int, a1, long int, a2) - -# define LOAD_ARGS_TYPES_3(t1, a1, t2, a2, t3, a3) \ - t3 __arg3 = (t3) (a3); \ - LOAD_ARGS_TYPES_2 (t1, a1, t2, a2) -# define LOAD_REGS_TYPES_3(t1, a1, t2, a2, t3, a3) \ - register t3 _a3 asm ("rdx") = __arg3; \ - LOAD_REGS_TYPES_2(t1, a1, t2, a2) -# define ASM_ARGS_3 ASM_ARGS_2, "r" (_a3) -# define LOAD_ARGS_3(a1, a2, a3) \ - LOAD_ARGS_TYPES_3 (long int, a1, long int, a2, long int, a3) -# define LOAD_REGS_3 \ - LOAD_REGS_TYPES_3 (long int, a1, long int, a2, long int, a3) - -# define LOAD_ARGS_TYPES_4(t1, a1, t2, a2, t3, a3, t4, a4) \ - t4 __arg4 = (t4) (a4); \ - LOAD_ARGS_TYPES_3 (t1, a1, t2, a2, t3, a3) -# define LOAD_REGS_TYPES_4(t1, a1, t2, a2, t3, a3, t4, a4) \ - register t4 _a4 asm ("r10") = __arg4; \ - LOAD_REGS_TYPES_3(t1, a2, t2, a2, t3, a3) -# define ASM_ARGS_4 ASM_ARGS_3, "r" (_a4) -# define LOAD_ARGS_4(a1, a2, a3, a4) \ - LOAD_ARGS_TYPES_4 (long int, a1, long int, a2, long int, a3, \ - long int, a4) -# define LOAD_REGS_4 \ - LOAD_REGS_TYPES_4 (long int, a1, long int, a2, long int, a3, \ - long int, a4) - -# define LOAD_ARGS_TYPES_5(t1, a1, t2, a2, t3, a3, t4, a4, t5, a5) \ - t5 __arg5 = (t5) (a5); \ - LOAD_ARGS_TYPES_4 (t1, a1, t2, a2, t3, a3, t4, a4) -# define LOAD_REGS_TYPES_5(t1, a1, t2, a2, t3, a3, t4, a4, t5, a5) \ - register t5 _a5 asm ("r8") = __arg5; \ - LOAD_REGS_TYPES_4 (t1, a1, t2, a2, t3, a3, t4, a4) -# define ASM_ARGS_5 ASM_ARGS_4, "r" (_a5) -# define LOAD_ARGS_5(a1, a2, a3, a4, a5) \ - LOAD_ARGS_TYPES_5 (long int, a1, long int, a2, long int, a3, \ - long int, a4, long int, a5) -# define LOAD_REGS_5 \ - LOAD_REGS_TYPES_5 (long int, a1, long int, a2, long int, a3, \ - long int, a4, long int, a5) - -# define LOAD_ARGS_TYPES_6(t1, a1, t2, a2, t3, a3, t4, a4, t5, a5, t6, a6) \ - t6 __arg6 = (t6) (a6); \ - LOAD_ARGS_TYPES_5 (t1, a1, t2, a2, t3, a3, t4, a4, t5, a5) -# define LOAD_REGS_TYPES_6(t1, a1, t2, a2, t3, a3, t4, a4, t5, a5, t6, a6) \ - register t6 _a6 asm ("r9") = __arg6; \ - LOAD_REGS_TYPES_5 (t1, a1, t2, a2, t3, a3, t4, a4, t5, a5) -# define ASM_ARGS_6 ASM_ARGS_5, "r" (_a6) -# define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \ - LOAD_ARGS_TYPES_6 (long int, a1, long int, a2, long int, a3, \ - long int, a4, long int, a5, long int, a6) -# define LOAD_REGS_6 \ - LOAD_REGS_TYPES_6 (long int, a1, long int, a2, long int, a3, \ - long int, a4, long int, a5, long int, a6) - -#endif /* __ASSEMBLER__ */ - - -/* Pointer mangling support. */ -#if IS_IN (rtld) -/* We cannot use the thread descriptor because in ld.so we use setjmp - earlier than the descriptor is initialized. */ -# ifdef __ASSEMBLER__ -# define PTR_MANGLE(reg) xor __pointer_chk_guard_local(%rip), reg; \ - rol $2*LP_SIZE+1, reg -# define PTR_DEMANGLE(reg) ror $2*LP_SIZE+1, reg; \ - xor __pointer_chk_guard_local(%rip), reg -# else -# define PTR_MANGLE(reg) asm ("xor __pointer_chk_guard_local(%%rip), %0\n" \ - "rol $2*" LP_SIZE "+1, %0" \ - : "=r" (reg) : "0" (reg)) -# define PTR_DEMANGLE(reg) asm ("ror $2*" LP_SIZE "+1, %0\n" \ - "xor __pointer_chk_guard_local(%%rip), %0" \ - : "=r" (reg) : "0" (reg)) -# endif -#else -# ifdef __ASSEMBLER__ -# define PTR_MANGLE(reg) xor %fs:POINTER_GUARD, reg; \ - rol $2*LP_SIZE+1, reg -# define PTR_DEMANGLE(reg) ror $2*LP_SIZE+1, reg; \ - xor %fs:POINTER_GUARD, reg -# else -# define PTR_MANGLE(var) asm ("xor %%fs:%c2, %0\n" \ - "rol $2*" LP_SIZE "+1, %0" \ - : "=r" (var) \ - : "0" (var), \ - "i" (offsetof (tcbhead_t, \ - pointer_guard))) -# define PTR_DEMANGLE(var) asm ("ror $2*" LP_SIZE "+1, %0\n" \ - "xor %%fs:%c2, %0" \ - : "=r" (var) \ - : "0" (var), \ - "i" (offsetof (tcbhead_t, \ - pointer_guard))) -# endif -#endif - -/* How to pass the off{64}_t argument on p{readv,writev}{64}. */ -#undef LO_HI_LONG -#define LO_HI_LONG(val) (val), 0 - -#endif /* linux/x86_64/sysdep.h */ |