| 1 | @ vim:filetype=armasm |
| 2 | #include <sys/syscall.h> |
| 3 | |
| 4 | @ support ancient toolchains (gcc 2.95.3 has upto 225) |
| 5 | #ifndef __NR_futex |
| 6 | #define __NR_futex (__NR_SYSCALL_BASE+240) |
| 7 | #endif |
| 8 | #ifndef __NR_exit_group |
| 9 | #define __NR_exit_group (__NR_SYSCALL_BASE+248) |
| 10 | #endif |
| 11 | #ifndef __NR_clock_gettime |
| 12 | #define __NR_clock_gettime (__NR_SYSCALL_BASE+263) |
| 13 | #endif |
| 14 | |
| 15 | .global sys_cacheflush @ const void *start_addr, const void *end_addr |
| 16 | sys_cacheflush: |
| 17 | mov r2, #0 |
| 18 | #ifdef __ARM_EABI__ |
| 19 | /* EABI version */ |
| 20 | str r7, [sp, #-4]! |
| 21 | mov r7, #(__ARM_NR_cacheflush & 0xff) |
| 22 | #if (__ARM_NR_cacheflush & 0x00ff00) |
| 23 | orr r7, r7, #(__ARM_NR_cacheflush & 0x00ff00) |
| 24 | #endif |
| 25 | #if (__ARM_NR_cacheflush & 0xff0000) |
| 26 | orr r7, r7, #(__ARM_NR_cacheflush & 0xff0000) |
| 27 | #endif |
| 28 | swi 0 |
| 29 | ldr r7, [sp], #4 |
| 30 | #else |
| 31 | /* OABI */ |
| 32 | swi __ARM_NR_cacheflush |
| 33 | #endif |
| 34 | bx lr |
| 35 | |
| 36 | |
| 37 | #ifdef __ARM_EABI__ |
| 38 | #error hm? |
| 39 | #endif |
| 40 | |
| 41 | .global g_syscall |
| 42 | g_syscall: |
| 43 | mov r12, sp |
| 44 | stmfd sp!, {r4, r5, r6} |
| 45 | ldmia r12, {r4, r5, r6} |
| 46 | swi __NR_syscall |
| 47 | ldmfd sp!, {r4, r5, r6} |
| 48 | |
| 49 | .global g_syscall_error |
| 50 | g_syscall_error: |
| 51 | cmn r0, #4096 |
| 52 | bxcc lr |
| 53 | stmfd sp!, {r4, lr} |
| 54 | rsb r4, r0, #0 |
| 55 | bl __errno_location |
| 56 | str r4, [r0] |
| 57 | mov r0, #-1 |
| 58 | ldmfd sp!, {r4, pc} |
| 59 | |
| 60 | .global g_clone |
| 61 | g_clone: |
| 62 | ldr r12,[sp, #4] @ arg6 - convenience func ptr |
| 63 | str r4, [sp, #-4]! |
| 64 | ldr r4, [sp, #4] @ arg5 |
| 65 | swi __NR_clone |
| 66 | tst r0, r0 |
| 67 | bxeq r12 @ child |
| 68 | cmn r0, #4096 |
| 69 | ldr r4, [sp], #4 |
| 70 | bcs g_syscall_error |
| 71 | bx lr |
| 72 | |
| 73 | @ raw - no errno |
| 74 | .macro raw_syscall_easy name nr |
| 75 | .global \name |
| 76 | \name: |
| 77 | swi \nr |
| 78 | bx lr |
| 79 | .endm |
| 80 | |
| 81 | .macro raw_syscall name nr |
| 82 | .global \name |
| 83 | \name: |
| 84 | mov r12, sp |
| 85 | stmfd sp!, {r4, r5, r6, lr} |
| 86 | ldmia r12, {r4, r5, r6} |
| 87 | swi \nr |
| 88 | ldmfd sp!, {r4, r5, r6, pc} |
| 89 | .endm |
| 90 | |
| 91 | raw_syscall_easy g_open_raw, __NR_open |
| 92 | raw_syscall_easy g_read_raw, __NR_read |
| 93 | raw_syscall_easy g_write_raw, __NR_write |
| 94 | raw_syscall g_mmap2_raw, __NR_mmap2 |
| 95 | raw_syscall_easy g_munmap_raw, __NR_munmap |
| 96 | raw_syscall_easy g_ioctl_raw, __NR_ioctl |
| 97 | raw_syscall_easy g_close_raw, __NR_close |
| 98 | raw_syscall_easy g_chdir_raw, __NR_chdir |
| 99 | raw_syscall_easy g_mkdir_raw, __NR_mkdir |
| 100 | raw_syscall_easy g_futex_raw, __NR_futex |
| 101 | raw_syscall_easy g_nanosleep_raw, __NR_nanosleep |
| 102 | raw_syscall_easy g_readlink_raw, __NR_readlink |
| 103 | raw_syscall_easy g_execve_raw, __NR_execve |
| 104 | raw_syscall_easy g_clock_gettime_raw, __NR_clock_gettime |
| 105 | raw_syscall_easy g_rt_sigprocmask_raw, __NR_rt_sigprocmask |
| 106 | raw_syscall_easy g_exit_group_raw, __NR_exit_group |