diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/or1k/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/or1k/sysdep.h | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/or1k/sysdep.h b/sysdeps/unix/sysv/linux/or1k/sysdep.h new file mode 100644 index 0000000000..941c934554 --- /dev/null +++ b/sysdeps/unix/sysv/linux/or1k/sysdep.h @@ -0,0 +1,201 @@ +/* Assembler and syscall macros. OpenRISC version. + Copyright (C) 2022 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 + <https://www.gnu.org/licenses/>. */ + +#ifndef _LINUX_OR1K_SYSDEP_H +#define _LINUX_OR1K_SYSDEP_H 1 + +#include <sysdeps/or1k/sysdep.h> +#include <sysdeps/unix/sysv/linux/generic/sysdep.h> +#include <tls.h> + +/* "workarounds" for generic code needing to handle 64-bit time_t. */ + +#undef __NR_clock_getres +#undef __NR_futex +#undef __NR_ppoll +#undef __NR_pselect6 +#undef __NR_recvmmsg +#undef __NR_rt_sigtimedwait +#undef __NR_semtimedop +#undef __NR_utimensat + +/* Fix sysdeps/unix/sysv/linux/clock_getcpuclockid.c. */ +#define __NR_clock_getres __NR_clock_getres_time64 +/* Fix sysdeps/nptl/lowlevellock-futex.h. */ +#define __NR_futex __NR_futex_time64 +/* Fix sysdeps/unix/sysv/linux/pause.c. */ +#define __NR_ppoll __NR_ppoll_time64 +/* Fix sysdeps/unix/sysv/linux/select.c. */ +#define __NR_pselect6 __NR_pselect6_time64 +/* Fix sysdeps/unix/sysv/linux/recvmmsg.c. */ +#define __NR_recvmmsg __NR_recvmmsg_time64 +/* Fix sysdeps/unix/sysv/linux/sigtimedwait.c. */ +#define __NR_rt_sigtimedwait __NR_rt_sigtimedwait_time64 +/* Fix sysdeps/unix/sysv/linux/semtimedop.c. */ +#define __NR_semtimedop __NR_semtimedop_time64 +/* Hack sysdeps/unix/sysv/linux/generic/utimes.c. */ +#define __NR_utimensat __NR_utimensat_time64 + +#undef SYS_ify +#define SYS_ify(syscall_name) (__NR_##syscall_name) + +/* 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. */ + +#ifdef __ASSEMBLER__ + +/* Macros used in syscall-template.S */ +#define ret l.jr r9; l.nop +#define ret_NOERRNO l.jr r9; l.nop + +#undef DO_CALL +#define DO_CALL(syscall_name) \ + l.addi r11, r0, SYS_ify (syscall_name); \ + l.sys 1; \ + l.nop + +#undef PSEUDO +#define PSEUDO(name, syscall_name, args) \ + ENTRY (name); \ + DO_CALL(syscall_name); \ + /* if -4096 < ret < 0 holds, it's an error */ \ + l.sfgeui r11, 0xf001; \ + l.bf L(pseudo_end); \ + l.nop + +#undef PSEUDO_NOERRNO +#define PSEUDO_NOERRNO(name, syscall_name, args) \ + ENTRY (name); \ + DO_CALL(syscall_name) + +#undef PSEUDO_END +#define PSEUDO_END(name) \ +L(pseudo_end): \ + l.j SYSCALL_ERROR_NAME; \ + l.ori r3,r11,0; \ + END (name) + +#undef PSEUDO_END_NOERRNO +#define PSEUDO_END_NOERRNO(name) \ + END (name) + +#ifndef PIC +/* For static code, on error jump to __syscall_error directly. */ +# define SYSCALL_ERROR_NAME __syscall_error +#elif !IS_IN (libc) +/* Use the internal name for libc 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 + +#else /* not __ASSEMBLER__ */ + +#include <errno.h> + +extern long int __syscall_error (long int neg_errno); + +/* Pointer mangling is not yet supported for or1k. */ +#define PTR_MANGLE(var) (void) (var) +#define PTR_DEMANGLE(var) (void) (var) + +#undef INTERNAL_SYSCALL +#define INTERNAL_SYSCALL(name, nr, args...) \ + INTERNAL_SYSCALL_NCS (SYS_ify (name), nr, args) + +/* The _NCS variant allows non-constant syscall numbers. */ +#undef INTERNAL_SYSCALL_NCS +#define INTERNAL_SYSCALL_NCS(number, nr, args...) \ + ({ unsigned long int __sys_result; \ + { \ + long int _sc_ret = (long int) number; \ + LOAD_ARGS_##nr (args) \ + register long int __sc_ret __asm__ ("r11") = _sc_ret; \ + __asm__ __volatile__ ("l.sys 1\n\t" \ + " l.nop\n\t" \ + : "+r" (__sc_ret) \ + : ASM_ARGS_##nr \ + : ASM_CLOBBERS_##nr \ + "r12", "r13", "r15", "r17", "r19", \ + "r21", "r23", "r25", "r27", "r29", \ + "r31", "memory"); \ + __sys_result = __sc_ret; \ + } \ + (long int) __sys_result; }) + +/* From here on we have nested macros that generate code for + setting up syscall arguments. */ + +#define LOAD_ARGS_0() + +#define ASM_ARGS_0 +#define ASM_CLOBBERS_0 "r3", ASM_CLOBBERS_1 + +#define LOAD_ARGS_1(a) \ + long int _a = (long int)(a); \ + register long int __a __asm__ ("r3") = _a; +#define ASM_ARGS_1 "r" (__a) +#define ASM_CLOBBERS_1 "r4", ASM_CLOBBERS_2 + +#define LOAD_ARGS_2(a, b) \ + long int _b = (long int)(b); \ + LOAD_ARGS_1 (a) \ + register long int __b __asm__ ("r4") = _b; +#define ASM_ARGS_2 ASM_ARGS_1, "r" (__b) +#define ASM_CLOBBERS_2 "r5", ASM_CLOBBERS_3 + +#define LOAD_ARGS_3(a, b, c) \ + long int _c = (long int)(c); \ + LOAD_ARGS_2 (a, b) \ + register long int __c __asm__ ("r5") = _c; +#define ASM_ARGS_3 ASM_ARGS_2, "r" (__c) +#define ASM_CLOBBERS_3 "r6", ASM_CLOBBERS_4 + +#define LOAD_ARGS_4(a, b, c, d) \ + LOAD_ARGS_3 (a, b, c) \ + long int _d = (long int)(d); \ + register long int __d __asm__ ("r6") = _d; +#define ASM_ARGS_4 ASM_ARGS_3, "r" (__d) +#define ASM_CLOBBERS_4 "r7", ASM_CLOBBERS_5 + +#define LOAD_ARGS_5(a, b, c, d, e) \ + long int _e = (long int)(e); \ + LOAD_ARGS_4 (a, b, c, d) \ + register long int __e __asm__ ("r7") = _e; +#define ASM_ARGS_5 ASM_ARGS_4, "r" (__e) +#define ASM_CLOBBERS_5 "r8", ASM_CLOBBERS_6 + +#define LOAD_ARGS_6(a, b, c, d, e, f) \ + long int _f = (long int)(f); \ + LOAD_ARGS_5 (a, b, c, d, e) \ + register long int __f __asm__ ("r8") = _f; +#define ASM_ARGS_6 ASM_ARGS_5, "r" (__f) +#define ASM_CLOBBERS_6 + +#endif /* not __ASSEMBLER__ */ + +#endif /* linux/or1k/sysdep.h */ |