| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| 2 | #ifndef _ASM_SHMBUF_H |
| 3 | #define _ASM_SHMBUF_H |
| 4 | |
| 5 | /* |
| 6 | * The shmid64_ds structure for the MIPS architecture. |
| 7 | * Note extra padding because this structure is passed back and forth |
| 8 | * between kernel and user space. |
| 9 | * |
| 10 | * As MIPS was lacking proper padding after shm_?time, we use 48 bits |
| 11 | * of the padding at the end to store a few additional bits of the time. |
| 12 | * libc implementations need to take care to convert this into a proper |
| 13 | * data structure when moving to 64-bit time_t. |
| 14 | */ |
| 15 | |
| 16 | #ifdef __mips64 |
| 17 | struct shmid64_ds { |
| 18 | struct ipc64_perm shm_perm; /* operation perms */ |
| 19 | size_t shm_segsz; /* size of segment (bytes) */ |
| 20 | long shm_atime; /* last attach time */ |
| 21 | long shm_dtime; /* last detach time */ |
| 22 | long shm_ctime; /* last change time */ |
| 23 | __kernel_pid_t shm_cpid; /* pid of creator */ |
| 24 | __kernel_pid_t shm_lpid; /* pid of last operator */ |
| 25 | unsigned long shm_nattch; /* no. of current attaches */ |
| 26 | unsigned long __unused1; |
| 27 | unsigned long __unused2; |
| 28 | }; |
| 29 | #else |
| 30 | struct shmid64_ds { |
| 31 | struct ipc64_perm shm_perm; /* operation perms */ |
| 32 | size_t shm_segsz; /* size of segment (bytes) */ |
| 33 | unsigned long shm_atime; /* last attach time */ |
| 34 | unsigned long shm_dtime; /* last detach time */ |
| 35 | unsigned long shm_ctime; /* last change time */ |
| 36 | __kernel_pid_t shm_cpid; /* pid of creator */ |
| 37 | __kernel_pid_t shm_lpid; /* pid of last operator */ |
| 38 | unsigned long shm_nattch; /* no. of current attaches */ |
| 39 | unsigned short shm_atime_high; |
| 40 | unsigned short shm_dtime_high; |
| 41 | unsigned short shm_ctime_high; |
| 42 | unsigned short __unused1; |
| 43 | }; |
| 44 | #endif |
| 45 | |
| 46 | struct shminfo64 { |
| 47 | unsigned long shmmax; |
| 48 | unsigned long shmmin; |
| 49 | unsigned long shmmni; |
| 50 | unsigned long shmseg; |
| 51 | unsigned long shmall; |
| 52 | unsigned long __unused1; |
| 53 | unsigned long __unused2; |
| 54 | unsigned long __unused3; |
| 55 | unsigned long __unused4; |
| 56 | }; |
| 57 | |
| 58 | #endif /* _ASM_SHMBUF_H */ |