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| 1 | /* Assembler and syscall macros. OpenRISC version. |
|---|---|
| 2 | Copyright (C) 2022-2024 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library. If not, see |
| 17 | <https://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #ifndef _LINUX_OR1K_SYSDEP_H |
| 20 | #define _LINUX_OR1K_SYSDEP_H 1 |
| 21 | |
| 22 | #include <sysdeps/unix/sysv/linux/sysdep.h> |
| 23 | #include <sysdeps/or1k/sysdep.h> |
| 24 | #include <sysdeps/unix/sysdep.h> |
| 25 | #include <tls.h> |
| 26 | |
| 27 | /* "workarounds" for generic code needing to handle 64-bit time_t. */ |
| 28 | |
| 29 | #undef __NR_clock_getres |
| 30 | #undef __NR_futex |
| 31 | #undef __NR_ppoll |
| 32 | #undef __NR_pselect6 |
| 33 | #undef __NR_recvmmsg |
| 34 | #undef __NR_rt_sigtimedwait |
| 35 | #undef __NR_semtimedop |
| 36 | #undef __NR_utimensat |
| 37 | |
| 38 | /* Fix sysdeps/unix/sysv/linux/clock_getcpuclockid.c. */ |
| 39 | #define __NR_clock_getres __NR_clock_getres_time64 |
| 40 | /* Fix sysdeps/nptl/lowlevellock-futex.h. */ |
| 41 | #define __NR_futex __NR_futex_time64 |
| 42 | /* Fix sysdeps/unix/sysv/linux/pause.c. */ |
| 43 | #define __NR_ppoll __NR_ppoll_time64 |
| 44 | /* Fix sysdeps/unix/sysv/linux/select.c. */ |
| 45 | #define __NR_pselect6 __NR_pselect6_time64 |
| 46 | /* Fix sysdeps/unix/sysv/linux/recvmmsg.c. */ |
| 47 | #define __NR_recvmmsg __NR_recvmmsg_time64 |
| 48 | /* Fix sysdeps/unix/sysv/linux/sigtimedwait.c. */ |
| 49 | #define __NR_rt_sigtimedwait __NR_rt_sigtimedwait_time64 |
| 50 | /* Fix sysdeps/unix/sysv/linux/semtimedop.c. */ |
| 51 | #define __NR_semtimedop __NR_semtimedop_time64 |
| 52 | /* Hack sysdeps/unix/sysv/linux/generic/utimes.c. */ |
| 53 | #define __NR_utimensat __NR_utimensat_time64 |
| 54 | |
| 55 | #undef SYS_ify |
| 56 | #define SYS_ify(syscall_name) (__NR_##syscall_name) |
| 57 | |
| 58 | /* Linux uses a negative return value to indicate syscall errors, |
| 59 | unlike most Unices, which use the condition codes' carry flag. |
| 60 | |
| 61 | Since version 2.1 the return value of a system call might be |
| 62 | negative even if the call succeeded. E.g., the lseek system call |
| 63 | might return a large offset. Therefore we must not anymore test |
| 64 | for < 0, but test for a real error by making sure the value in R0 |
| 65 | is a real error number. Linus said he will make sure the no syscall |
| 66 | returns a value in -1 .. -4095 as a valid result so we can safely |
| 67 | test with -4095. */ |
| 68 | |
| 69 | #ifdef __ASSEMBLER__ |
| 70 | |
| 71 | /* Macros used in syscall-template.S */ |
| 72 | #define ret l.jr r9; l.nop |
| 73 | #define ret_NOERRNO l.jr r9; l.nop |
| 74 | |
| 75 | #undef DO_CALL |
| 76 | #define DO_CALL(syscall_name) \ |
| 77 | l.addi r11, r0, SYS_ify (syscall_name); \ |
| 78 | l.sys 1; \ |
| 79 | l.nop |
| 80 | |
| 81 | #undef PSEUDO |
| 82 | #define PSEUDO(name, syscall_name, args) \ |
| 83 | ENTRY (name); \ |
| 84 | DO_CALL(syscall_name); \ |
| 85 | /* if -4096 < ret < 0 holds, it's an error */ \ |
| 86 | l.sfgeui r11, 0xf001; \ |
| 87 | l.bf L(pseudo_end); \ |
| 88 | l.nop |
| 89 | |
| 90 | #undef PSEUDO_NOERRNO |
| 91 | #define PSEUDO_NOERRNO(name, syscall_name, args) \ |
| 92 | ENTRY (name); \ |
| 93 | DO_CALL(syscall_name) |
| 94 | |
| 95 | #undef PSEUDO_END |
| 96 | #define PSEUDO_END(name) \ |
| 97 | L(pseudo_end): \ |
| 98 | l.j SYSCALL_ERROR_NAME; \ |
| 99 | l.ori r3,r11,0; \ |
| 100 | END (name) |
| 101 | |
| 102 | #undef PSEUDO_END_NOERRNO |
| 103 | #define PSEUDO_END_NOERRNO(name) \ |
| 104 | END (name) |
| 105 | |
| 106 | #ifndef PIC |
| 107 | /* For static code, on error jump to __syscall_error directly. */ |
| 108 | # define SYSCALL_ERROR_NAME __syscall_error |
| 109 | #elif !IS_IN (libc) |
| 110 | /* Use the internal name for libc shared objects. */ |
| 111 | # define SYSCALL_ERROR_NAME __GI___syscall_error |
| 112 | #else |
| 113 | /* Otherwise, on error do a full PLT jump. */ |
| 114 | # define SYSCALL_ERROR_NAME plt(__syscall_error) |
| 115 | #endif |
| 116 | |
| 117 | #else /* not __ASSEMBLER__ */ |
| 118 | |
| 119 | #include <errno.h> |
| 120 | |
| 121 | extern long int __syscall_error (long int neg_errno); |
| 122 | |
| 123 | #undef INTERNAL_SYSCALL |
| 124 | #define INTERNAL_SYSCALL(name, nr, args...) \ |
| 125 | INTERNAL_SYSCALL_NCS (SYS_ify (name), nr, args) |
| 126 | |
| 127 | /* The _NCS variant allows non-constant syscall numbers. */ |
| 128 | #undef INTERNAL_SYSCALL_NCS |
| 129 | #define INTERNAL_SYSCALL_NCS(number, nr, args...) \ |
| 130 | ({ unsigned long int __sys_result; \ |
| 131 | { \ |
| 132 | long int _sc_ret = (long int) number; \ |
| 133 | LOAD_ARGS_##nr (args) \ |
| 134 | register long int __sc_ret __asm__ ("r11") = _sc_ret; \ |
| 135 | __asm__ __volatile__ ("l.sys 1\n\t" \ |
| 136 | " l.nop\n\t" \ |
| 137 | : "+r" (__sc_ret) \ |
| 138 | : ASM_ARGS_##nr \ |
| 139 | : ASM_CLOBBERS_##nr \ |
| 140 | "r12", "r13", "r15", "r17", "r19", \ |
| 141 | "r21", "r23", "r25", "r27", "r29", \ |
| 142 | "r31", "memory"); \ |
| 143 | __sys_result = __sc_ret; \ |
| 144 | } \ |
| 145 | (long int) __sys_result; }) |
| 146 | |
| 147 | /* From here on we have nested macros that generate code for |
| 148 | setting up syscall arguments. */ |
| 149 | |
| 150 | #define LOAD_ARGS_0() |
| 151 | |
| 152 | #define ASM_ARGS_0 |
| 153 | #define ASM_CLOBBERS_0 "r3", ASM_CLOBBERS_1 |
| 154 | |
| 155 | #define LOAD_ARGS_1(a) \ |
| 156 | long int _a = (long int)(a); \ |
| 157 | register long int __a __asm__ ("r3") = _a; |
| 158 | #define ASM_ARGS_1 "r" (__a) |
| 159 | #define ASM_CLOBBERS_1 "r4", ASM_CLOBBERS_2 |
| 160 | |
| 161 | #define LOAD_ARGS_2(a, b) \ |
| 162 | long int _b = (long int)(b); \ |
| 163 | LOAD_ARGS_1 (a) \ |
| 164 | register long int __b __asm__ ("r4") = _b; |
| 165 | #define ASM_ARGS_2 ASM_ARGS_1, "r" (__b) |
| 166 | #define ASM_CLOBBERS_2 "r5", ASM_CLOBBERS_3 |
| 167 | |
| 168 | #define LOAD_ARGS_3(a, b, c) \ |
| 169 | long int _c = (long int)(c); \ |
| 170 | LOAD_ARGS_2 (a, b) \ |
| 171 | register long int __c __asm__ ("r5") = _c; |
| 172 | #define ASM_ARGS_3 ASM_ARGS_2, "r" (__c) |
| 173 | #define ASM_CLOBBERS_3 "r6", ASM_CLOBBERS_4 |
| 174 | |
| 175 | #define LOAD_ARGS_4(a, b, c, d) \ |
| 176 | LOAD_ARGS_3 (a, b, c) \ |
| 177 | long int _d = (long int)(d); \ |
| 178 | register long int __d __asm__ ("r6") = _d; |
| 179 | #define ASM_ARGS_4 ASM_ARGS_3, "r" (__d) |
| 180 | #define ASM_CLOBBERS_4 "r7", ASM_CLOBBERS_5 |
| 181 | |
| 182 | #define LOAD_ARGS_5(a, b, c, d, e) \ |
| 183 | long int _e = (long int)(e); \ |
| 184 | LOAD_ARGS_4 (a, b, c, d) \ |
| 185 | register long int __e __asm__ ("r7") = _e; |
| 186 | #define ASM_ARGS_5 ASM_ARGS_4, "r" (__e) |
| 187 | #define ASM_CLOBBERS_5 "r8", ASM_CLOBBERS_6 |
| 188 | |
| 189 | #define LOAD_ARGS_6(a, b, c, d, e, f) \ |
| 190 | long int _f = (long int)(f); \ |
| 191 | LOAD_ARGS_5 (a, b, c, d, e) \ |
| 192 | register long int __f __asm__ ("r8") = _f; |
| 193 | #define ASM_ARGS_6 ASM_ARGS_5, "r" (__f) |
| 194 | #define ASM_CLOBBERS_6 |
| 195 | |
| 196 | #endif /* not __ASSEMBLER__ */ |
| 197 | |
| 198 | #endif /* linux/or1k/sysdep.h */ |
| 199 |
Warning: That file was not part of the compilation database. It may have many parsing errors.