diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h | 345 |
1 files changed, 0 insertions, 345 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h deleted file mode 100644 index e22d9b6b13..0000000000 --- a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h +++ /dev/null @@ -1,345 +0,0 @@ -/* Assembler macros for 64 bit S/390. - Copyright (C) 2001-2017 Free Software Foundation, Inc. - Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). - 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_S390_SYSDEP_H -#define _LINUX_S390_SYSDEP_H - -#include <sysdeps/s390/s390-64/sysdep.h> -#include <sysdeps/unix/sysdep.h> -#include <sysdeps/unix/sysv/linux/sysdep.h> -#include <dl-sysdep.h> /* For RTLD_PRIVATE_ERRNO. */ -#include <tls.h> - -/* Define __set_errno() for INLINE_SYSCALL macro below. */ -#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. */ -/* In newer 2.1 kernels __NR_syscall is missing so we define it here. */ -#define __NR_syscall 0 - -/* - * Newer kernel versions redefined __NR_pread and __NR_pwrite to - * __NR_pread64 and __NR_pwrite64. - */ -#ifndef __NR_pread -# define __NR_pread __NR_pread64 -#endif -#ifndef __NR_pwrite -# define __NR_pwrite __NR_pwrite64 -#endif - -#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 gpr2 is a real error - number. Linus said he will make sure that no syscall returns a value - in -1 .. -4095 as a valid result so we can savely test with -4095. */ - -#undef PSEUDO -#define PSEUDO(name, syscall_name, args) \ - .text; \ - ENTRY (name) \ - DO_CALL (syscall_name, args); \ - lghi %r4,-4095 ; \ - clgr %r2,%r4 ; \ - jgnl 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) \ - SYSCALL_ERROR_HANDLER; \ - END (name) - -#undef PSEUDO_ERRVAL -#define PSEUDO_ERRVAL(name, syscall_name, args) \ - .text; \ - ENTRY (name) \ - DO_CALL (syscall_name, args); \ - lcgr %r2,%r2 - -#undef PSEUDO_END_ERRVAL -#define PSEUDO_END_ERRVAL(name) \ - SYSCALL_ERROR_HANDLER; \ - END (name) - -#ifndef PIC -# define SYSCALL_ERROR_LABEL syscall_error -# define SYSCALL_ERROR_HANDLER -#else -# if RTLD_PRIVATE_ERRNO -# define SYSCALL_ERROR_LABEL 0f -# define SYSCALL_ERROR_HANDLER \ -0: larl %r1,rtld_errno; \ - lcr %r2,%r2; \ - st %r2,0(%r1); \ - lghi %r2,-1; \ - br %r14 -# elif defined _LIBC_REENTRANT -# if IS_IN (libc) -# define SYSCALL_ERROR_ERRNO __libc_errno -# else -# define SYSCALL_ERROR_ERRNO errno -# endif -# define SYSCALL_ERROR_LABEL 0f -# define SYSCALL_ERROR_HANDLER \ -0: lcr %r0,%r2; \ - larl %r1,SYSCALL_ERROR_ERRNO@indntpoff; \ - lg %r1,0(%r1); \ - ear %r2,%a0; \ - sllg %r2,%r2,32; \ - ear %r2,%a1; \ - st %r0,0(%r1,%r2); \ - lghi %r2,-1; \ - br %r14 -# else -# define SYSCALL_ERROR_LABEL 0f -# define SYSCALL_ERROR_HANDLER \ -0: larl %r1,_GLOBAL_OFFSET_TABLE_; \ - lg %r1,errno@GOT(%r1); \ - lcr %r2,%r2; \ - st %r2,0(%r1); \ - lghi %r2,-1; \ - br %r14 -# endif /* _LIBC_REENTRANT */ -#endif /* PIC */ - -/* Linux takes system call arguments in registers: - - syscall number 1 call-clobbered - arg 1 2 call-clobbered - arg 2 3 call-clobbered - arg 3 4 call-clobbered - arg 4 5 call-clobbered - arg 5 6 call-saved - arg 6 7 call-saved - - (Of course a function with say 3 arguments does not have entries for - arguments 4 and 5.) - For system calls with 6 parameters a stack operation is required - to load the 6th parameter to register 7. Call saved register 7 is - moved to register 0 and back to avoid an additional stack frame. - */ - -#define DO_CALL(syscall, args) \ - .if args > 5; \ - lgr %r0,%r7; \ - lg %r7,160(%r15); \ - .endif; \ - .if SYS_ify (syscall) < 256; \ - svc SYS_ify (syscall); \ - .else; \ - lghi %r1,SYS_ify (syscall); \ - svc 0; \ - .endif; \ - .if args > 5; \ - lgr %r7,%r0; \ - .endif - -#define ret \ - br 14 - -#define ret_NOERRNO \ - br 14 - -#define ret_ERRVAL \ - br 14 - -#endif /* __ASSEMBLER__ */ - -#undef INLINE_SYSCALL -#define INLINE_SYSCALL(name, nr, args...) \ - ({ \ - long _ret = INTERNAL_SYSCALL (name, , nr, args); \ - if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (_ret, ))) \ - { \ - __set_errno (INTERNAL_SYSCALL_ERRNO (_ret, )); \ - _ret = -1; \ - } \ - _ret; }) - -#undef INTERNAL_SYSCALL_DECL -#define INTERNAL_SYSCALL_DECL(err) do { } while (0) - -#undef INTERNAL_SYSCALL_DIRECT -#define INTERNAL_SYSCALL_DIRECT(name, err, nr, args...) \ - ({ \ - DECLARGS_##nr(args) \ - register long _ret __asm__("2"); \ - __asm__ __volatile__ ( \ - "svc %b1\n\t" \ - : "=d" (_ret) \ - : "i" (__NR_##name) ASMFMT_##nr \ - : "memory" ); \ - _ret; }) - -#undef INTERNAL_SYSCALL_SVC0 -#define INTERNAL_SYSCALL_SVC0(name, err, nr, args...) \ - ({ \ - DECLARGS_##nr(args) \ - register unsigned long _nr __asm__("1") = (unsigned long)(__NR_##name); \ - register long _ret __asm__("2"); \ - __asm__ __volatile__ ( \ - "svc 0\n\t" \ - : "=d" (_ret) \ - : "d" (_nr) ASMFMT_##nr \ - : "memory" ); \ - _ret; }) - -#undef INTERNAL_SYSCALL_NCS -#define INTERNAL_SYSCALL_NCS(no, err, nr, args...) \ - ({ \ - DECLARGS_##nr(args) \ - register unsigned long _nr __asm__("1") = (unsigned long)(no); \ - register long _ret __asm__("2"); \ - __asm__ __volatile__ ( \ - "svc 0\n\t" \ - : "=d" (_ret) \ - : "d" (_nr) ASMFMT_##nr \ - : "memory" ); \ - _ret; }) - -#undef INTERNAL_SYSCALL -#define INTERNAL_SYSCALL(name, err, nr, args...) \ - (((__NR_##name) < 256) ? \ - INTERNAL_SYSCALL_DIRECT(name, err, nr, args) : \ - INTERNAL_SYSCALL_SVC0(name, err,nr, args)) - -#undef INTERNAL_SYSCALL_ERROR_P -#define INTERNAL_SYSCALL_ERROR_P(val, err) \ - ((unsigned long) (val) >= -4095UL) - -#undef INTERNAL_SYSCALL_ERRNO -#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val)) - -#define DECLARGS_0() -#define DECLARGS_1(arg1) \ - register unsigned long gpr2 __asm__ ("2") = (unsigned long)(arg1); -#define DECLARGS_2(arg1, arg2) \ - DECLARGS_1(arg1) \ - register unsigned long gpr3 __asm__ ("3") = (unsigned long)(arg2); -#define DECLARGS_3(arg1, arg2, arg3) \ - DECLARGS_2(arg1, arg2) \ - register unsigned long gpr4 __asm__ ("4") = (unsigned long)(arg3); -#define DECLARGS_4(arg1, arg2, arg3, arg4) \ - DECLARGS_3(arg1, arg2, arg3) \ - register unsigned long gpr5 __asm__ ("5") = (unsigned long)(arg4); -#define DECLARGS_5(arg1, arg2, arg3, arg4, arg5) \ - DECLARGS_4(arg1, arg2, arg3, arg4) \ - register unsigned long gpr6 __asm__ ("6") = (unsigned long)(arg5); -#define DECLARGS_6(arg1, arg2, arg3, arg4, arg5, arg6) \ - DECLARGS_5(arg1, arg2, arg3, arg4, arg5) \ - register unsigned long gpr7 __asm__ ("7") = (unsigned long)(arg6); - -#define ASMFMT_0 -#define ASMFMT_1 , "0" (gpr2) -#define ASMFMT_2 , "0" (gpr2), "d" (gpr3) -#define ASMFMT_3 , "0" (gpr2), "d" (gpr3), "d" (gpr4) -#define ASMFMT_4 , "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5) -#define ASMFMT_5 , "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5), "d" (gpr6) -#define ASMFMT_6 , "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5), "d" (gpr6), "d" (gpr7) - -#define CLOBBER_0 , "3", "4", "5" -#define CLOBBER_1 , "3", "4", "5" -#define CLOBBER_2 , "4", "5" -#define CLOBBER_3 , "5" -#define CLOBBER_4 -#define CLOBBER_5 -#define CLOBBER_6 - -/* 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 -#define HAVE_GETCPU_VSYSCALL 1 - -/* This version is for internal uses when there is no desire - to set errno */ -#define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, nr, args...) \ - ({ \ - long int _ret = ENOSYS; \ - \ - __typeof (__vdso_##name) vdsop = __vdso_##name; \ - PTR_DEMANGLE (vdsop); \ - if (vdsop != NULL) \ - _ret = INTERNAL_VSYSCALL_CALL (vdsop, err, nr, ##args); \ - else \ - err = 1 << 28; \ - _ret; \ - }) - -#define INTERNAL_VSYSCALL_CALL(fn, err, nr, args...) \ - ({ \ - DECLARGS_##nr(args) \ - register long _ret __asm__("2"); \ - __asm__ __volatile__ ( \ - "lgr 10,14\n\t" \ - "basr 14,%1\n\t" \ - "lgr 14,10\n\t" \ - : "=d" (_ret) \ - : "a" (fn) ASMFMT_##nr \ - : "cc", "memory", "0", "1", "10" CLOBBER_##nr); \ - _ret; }) - -/* 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. */ -#else -/* For the time being just use stack_guard rather than a separate - pointer_guard. */ -# ifdef __ASSEMBLER__ -# define PTR_MANGLE(reg, tmpreg) \ - ear tmpreg,%a0; \ - sllg tmpreg,tmpreg,32; \ - ear tmpreg,%a1; \ - xg reg,STACK_GUARD(tmpreg) -# define PTR_MANGLE2(reg, tmpreg) \ - xg reg,STACK_GUARD(tmpreg) -# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg) -# else -# define PTR_MANGLE(var) \ - (var) = (void *) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ()) -# define PTR_DEMANGLE(var) PTR_MANGLE (var) -# endif -#endif - -#endif /* _LINUX_S390_SYSDEP_H */ |