| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* sclow.S: Low level special syscall handling. |
| 2 | * Basically these are cases where we can completely |
| 3 | * handle the system call without saving any state |
| 4 | * because we know that the process will not sleep. |
| 5 | * |
| 6 | * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) |
| 7 | */ |
| 8 | |
| 9 | #include <asm/ptrace.h> |
| Sam Ravnborg | 4700349 | 2005-09-09 20:35:55 +0200 | [diff] [blame] | 10 | #include <asm/asm-offsets.h> |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <asm/errno.h> |
| 12 | #include <asm/winmacro.h> |
| 13 | #include <asm/thread_info.h> |
| 14 | #include <asm/psr.h> |
| 15 | #include <asm/page.h> |
| 16 | |
| 17 | #define CC_AND_RETT \ |
| 18 | set PSR_C, %l4; \ |
| 19 | andn %l0, %l4, %l4; \ |
| 20 | wr %l4, 0x0, %psr; \ |
| 21 | nop; nop; nop; \ |
| 22 | jmp %l2; \ |
| 23 | rett %l2 + 4; |
| 24 | |
| 25 | #define SC_AND_RETT \ |
| 26 | set PSR_C, %l4; \ |
| 27 | or %l0, %l4, %l4; \ |
| 28 | wr %l4, 0x0, %psr; \ |
| 29 | nop; nop; nop; \ |
| 30 | jmp %l2; \ |
| 31 | rett %l2 + 4; |
| 32 | |
| 33 | #define LABEL(func) func##_low |
| 34 | |
| 35 | .globl LABEL(sunosnop) |
| 36 | LABEL(sunosnop): |
| 37 | CC_AND_RETT |
| 38 | |
| 39 | #if (ASIZ_task_uid == 2 && ASIZ_task_euid == 2) |
| 40 | .globl LABEL(sunosgetuid) |
| 41 | LABEL(sunosgetuid): |
| 42 | LOAD_CURRENT(l4, l5) |
| 43 | ld [%l4 + TI_TASK], %l4 |
| 44 | lduh [%l4 + AOFF_task_uid], %i0 |
| 45 | lduh [%l4 + AOFF_task_euid], %i1 |
| 46 | CC_AND_RETT |
| 47 | #endif |
| 48 | |
| 49 | #if (ASIZ_task_gid == 2 && ASIZ_task_egid == 2) |
| 50 | .globl LABEL(sunosgetgid) |
| 51 | LABEL(sunosgetgid): |
| 52 | LOAD_CURRENT(l4, l5) |
| 53 | ld [%l4 + TI_TASK], %l4 |
| 54 | lduh [%l4 + AOFF_task_gid], %i0 |
| 55 | lduh [%l4 + AOFF_task_egid], %i1 |
| 56 | CC_AND_RETT |
| 57 | #endif |
| 58 | |
| 59 | .globl LABEL(sunosmctl) |
| 60 | LABEL(sunosmctl): |
| 61 | mov 0, %i0 |
| 62 | CC_AND_RETT |
| 63 | |
| 64 | .globl LABEL(sunosgdtsize) |
| 65 | LABEL(sunosgdtsize): |
| 66 | mov 256, %i0 |
| 67 | CC_AND_RETT |
| 68 | |
| 69 | .globl LABEL(getpagesize) |
| 70 | LABEL(getpagesize): |
| 71 | set PAGE_SIZE, %i0 |
| 72 | CC_AND_RETT |
| 73 | |
| 74 | /* XXX sys_nice() XXX */ |
| 75 | /* XXX sys_setpriority() XXX */ |
| 76 | /* XXX sys_getpriority() XXX */ |
| 77 | /* XXX sys_setregid() XXX */ |
| 78 | /* XXX sys_setgid() XXX */ |
| 79 | /* XXX sys_setreuid() XXX */ |
| 80 | /* XXX sys_setuid() XXX */ |
| 81 | /* XXX sys_setfsuid() XXX */ |
| 82 | /* XXX sys_setfsgid() XXX */ |
| 83 | /* XXX sys_setpgid() XXX */ |
| 84 | /* XXX sys_getpgid() XXX */ |
| 85 | /* XXX sys_setsid() XXX */ |
| 86 | /* XXX sys_getsid() XXX */ |