diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/riscv/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/riscv/sysdep.h | 325 |
1 files changed, 325 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/riscv/sysdep.h b/sysdeps/unix/sysv/linux/riscv/sysdep.h new file mode 100644 index 0000000000..5470ea3d2a --- /dev/null +++ b/sysdeps/unix/sysv/linux/riscv/sysdep.h @@ -0,0 +1,325 @@ +/* Assembly macros for RISC-V. + Copyright (C) 2011-2018 + 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_RISCV_SYSDEP_H +#define _LINUX_RISCV_SYSDEP_H 1 + +#include <sysdeps/unix/sysv/linux/generic/sysdep.h> +#include <tls.h> + +#ifdef __ASSEMBLER__ + +# include <sys/asm.h> + +# define ENTRY(name) LEAF(name) + +# define L(label) .L ## label + +/* Performs a system call, handling errors by setting errno. Linux indicates + errors by setting a0 to a value between -1 and -4095. */ +# undef PSEUDO +# define PSEUDO(name, syscall_name, args) \ + .text; \ + .align 2; \ + ENTRY (name); \ + li a7, SYS_ify (syscall_name); \ + scall; \ + li a7, -4096; \ + bgtu a0, a7, .Lsyscall_error ## name; + +# undef PSEUDO_END +# define PSEUDO_END(sym) \ + SYSCALL_ERROR_HANDLER (sym) \ + ret; \ + END (sym) + +# if !IS_IN (libc) +# if RTLD_PRIVATE_ERRNO +# define SYSCALL_ERROR_HANDLER(name) \ +.Lsyscall_error ## name: \ + li t1, -4096; \ + neg a0, a0; \ + sw a0, rtld_errno, t1; \ + li a0, -1; +# elif defined (__PIC__) +# define SYSCALL_ERROR_HANDLER(name) \ +.Lsyscall_error ## name: \ + la.tls.ie t1, errno; \ + add t1, t1, tp; \ + neg a0, a0; \ + sw a0, 0(t1); \ + li a0, -1; +# else +# define SYSCALL_ERROR_HANDLER(name) \ +.Lsyscall_error ## name: \ + lui t1, %tprel_hi(errno); \ + add t1, t1, tp, %tprel_add(errno); \ + neg a0, a0; \ + sw a0, %tprel_lo(errno)(t1); \ + li a0, -1; +# endif +# else +# define SYSCALL_ERROR_HANDLER(name) \ +.Lsyscall_error ## name: \ + j __syscall_error; +# endif + +/* Performs a system call, not setting errno. */ +# undef PSEUDO_NEORRNO +# define PSEUDO_NOERRNO(name, syscall_name, args) \ + .align 2; \ + ENTRY (name); \ + li a7, SYS_ify (syscall_name); \ + scall; + +# undef PSEUDO_END_NOERRNO +# define PSEUDO_END_NOERRNO(name) \ + END (name) + +# undef ret_NOERRNO +# define ret_NOERRNO ret + +/* Perfroms a system call, returning the error code. */ +# undef PSEUDO_ERRVAL +# define PSEUDO_ERRVAL(name, syscall_name, args) \ + PSEUDO_NOERRNO (name, syscall_name, args) \ + neg a0, a0; + +# undef PSEUDO_END_ERRVAL +# define PSEUDO_END_ERRVAL(name) \ + END (name) + +# undef ret_ERRVAL +# define ret_ERRVAL ret + +#endif /* __ASSEMBLER__ */ + +/* In order to get __set_errno() definition in INLINE_SYSCALL. */ +#ifndef __ASSEMBLER__ +# include <errno.h> +#endif + +#include <sysdeps/unix/sysdep.h> + +#undef SYS_ify +#define SYS_ify(syscall_name) __NR_##syscall_name + +#ifndef __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 +# define HAVE_GETCPU_VSYSCALL 1 + +/* Define a macro which expands into the inline wrapper code for a system + call. */ +# undef INLINE_SYSCALL +# define INLINE_SYSCALL(name, nr, args...) \ + ({ INTERNAL_SYSCALL_DECL (err); \ + long int __sys_result = INTERNAL_SYSCALL (name, err, nr, args); \ + if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (__sys_result, ))) \ + { \ + __set_errno (INTERNAL_SYSCALL_ERRNO (__sys_result, )); \ + __sys_result = (unsigned long) -1; \ + } \ + __sys_result; }) + +# define INTERNAL_SYSCALL_DECL(err) do { } while (0) + +# define INTERNAL_SYSCALL_ERROR_P(val, err) \ + ((unsigned long int) (val) > -4096UL) + +# define INTERNAL_SYSCALL_ERRNO(val, err) (-val) + +# define INTERNAL_SYSCALL(name, err, nr, args...) \ + internal_syscall##nr (SYS_ify (name), err, args) + +# define INTERNAL_SYSCALL_NCS(number, err, nr, args...) \ + internal_syscall##nr (number, err, args) + +# define internal_syscall0(number, err, dummy...) \ +({ \ + long int _sys_result; \ + \ + { \ + register long int __a7 asm ("a7") = number; \ + register long int __a0 asm ("a0"); \ + __asm__ volatile ( \ + "scall\n\t" \ + : "=r" (__a0) \ + : "r" (__a7) \ + : __SYSCALL_CLOBBERS); \ + _sys_result = __a0; \ + } \ + _sys_result; \ +}) + +# define internal_syscall1(number, err, arg0) \ +({ \ + long int _sys_result; \ + \ + { \ + register long int __a7 asm ("a7") = number; \ + register long int __a0 asm ("a0") = (long int) (arg0); \ + __asm__ volatile ( \ + "scall\n\t" \ + : "+r" (__a0) \ + : "r" (__a7) \ + : __SYSCALL_CLOBBERS); \ + _sys_result = __a0; \ + } \ + _sys_result; \ +}) + +# define internal_syscall2(number, err, arg0, arg1) \ +({ \ + long int _sys_result; \ + \ + { \ + register long int __a7 asm ("a7") = number; \ + register long int __a0 asm ("a0") = (long int) (arg0); \ + register long int __a1 asm ("a1") = (long int) (arg1); \ + __asm__ volatile ( \ + "scall\n\t" \ + : "+r" (__a0) \ + : "r" (__a7), "r" (__a1) \ + : __SYSCALL_CLOBBERS); \ + _sys_result = __a0; \ + } \ + _sys_result; \ +}) + +# define internal_syscall3(number, err, arg0, arg1, arg2) \ +({ \ + long int _sys_result; \ + \ + { \ + register long int __a7 asm ("a7") = number; \ + register long int __a0 asm ("a0") = (long int) (arg0); \ + register long int __a1 asm ("a1") = (long int) (arg1); \ + register long int __a2 asm ("a2") = (long int) (arg2); \ + __asm__ volatile ( \ + "scall\n\t" \ + : "+r" (__a0) \ + : "r" (__a7), "r" (__a1), "r" (__a2) \ + : __SYSCALL_CLOBBERS); \ + _sys_result = __a0; \ + } \ + _sys_result; \ +}) + +# define internal_syscall4(number, err, arg0, arg1, arg2, arg3) \ +({ \ + long int _sys_result; \ + \ + { \ + register long int __a7 asm ("a7") = number; \ + register long int __a0 asm ("a0") = (long int) (arg0); \ + register long int __a1 asm ("a1") = (long int) (arg1); \ + register long int __a2 asm ("a2") = (long int) (arg2); \ + register long int __a3 asm ("a3") = (long int) (arg3); \ + __asm__ volatile ( \ + "scall\n\t" \ + : "+r" (__a0) \ + : "r" (__a7), "r" (__a1), "r" (__a2), "r" (__a3) \ + : __SYSCALL_CLOBBERS); \ + _sys_result = __a0; \ + } \ + _sys_result; \ +}) + +# define internal_syscall5(number, err, arg0, arg1, arg2, arg3, arg4) \ +({ \ + long int _sys_result; \ + \ + { \ + register long int __a7 asm ("a7") = number; \ + register long int __a0 asm ("a0") = (long int) (arg0); \ + register long int __a1 asm ("a1") = (long int) (arg1); \ + register long int __a2 asm ("a2") = (long int) (arg2); \ + register long int __a3 asm ("a3") = (long int) (arg3); \ + register long int __a4 asm ("a4") = (long int) (arg4); \ + __asm__ volatile ( \ + "scall\n\t" \ + : "+r" (__a0) \ + : "r" (__a7), "r"(__a1), "r"(__a2), "r"(__a3), "r" (__a4) \ + : __SYSCALL_CLOBBERS); \ + _sys_result = __a0; \ + } \ + _sys_result; \ +}) + +# define internal_syscall6(number, err, arg0, arg1, arg2, arg3, arg4, arg5) \ +({ \ + long int _sys_result; \ + \ + { \ + register long int __a7 asm ("a7") = number; \ + register long int __a0 asm ("a0") = (long int) (arg0); \ + register long int __a1 asm ("a1") = (long int) (arg1); \ + register long int __a2 asm ("a2") = (long int) (arg2); \ + register long int __a3 asm ("a3") = (long int) (arg3); \ + register long int __a4 asm ("a4") = (long int) (arg4); \ + register long int __a5 asm ("a5") = (long int) (arg5); \ + __asm__ volatile ( \ + "scall\n\t" \ + : "+r" (__a0) \ + : "r" (__a7), "r" (__a1), "r" (__a2), "r" (__a3), \ + "r" (__a4), "r" (__a5) \ + : __SYSCALL_CLOBBERS); \ + _sys_result = __a0; \ + } \ + _sys_result; \ +}) + +# define internal_syscall7(number, err, arg0, arg1, arg2, arg3, arg4, arg5, arg6) \ +({ \ + long int _sys_result; \ + \ + { \ + register long int __a7 asm ("a7") = number; \ + register long int __a0 asm ("a0") = (long int) (arg0); \ + register long int __a1 asm ("a1") = (long int) (arg1); \ + register long int __a2 asm ("a2") = (long int) (arg2); \ + register long int __a3 asm ("a3") = (long int) (arg3); \ + register long int __a4 asm ("a4") = (long int) (arg4); \ + register long int __a5 asm ("a5") = (long int) (arg5); \ + register long int __a6 asm ("a6") = (long int) (arg6); \ + __asm__ volatile ( \ + "scall\n\t" \ + : "+r" (__a0) \ + : "r" (__a7), "r" (__a1), "r" (__a2), "r" (__a3), \ + "r" (__a4), "r" (__a5), "r" (__a6) \ + : __SYSCALL_CLOBBERS); \ + _sys_result = __a0; \ + } \ + _sys_result; \ +}) + +# define __SYSCALL_CLOBBERS "memory" + +extern long int __syscall_error (long int neg_errno); + +#endif /* ! __ASSEMBLER__ */ + +/* Pointer mangling is not supported. */ +#define PTR_MANGLE(var) (void) (var) +#define PTR_DEMANGLE(var) (void) (var) + +#endif /* linux/riscv/sysdep.h */ |