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1 | @ vim:filetype=armasm |
2 | #include <sys/syscall.h> |
3 | |
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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 |
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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 |
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88 | ldmfd sp!, {r4, r5, r6, pc} |
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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 |
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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 |
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99 | raw_syscall_easy g_mkdir_raw, __NR_mkdir |
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100 | raw_syscall_easy g_futex_raw, __NR_futex |
101 | raw_syscall_easy g_nanosleep_raw, __NR_nanosleep |
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102 | raw_syscall_easy g_readlink_raw, __NR_readlink |
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103 | raw_syscall_easy g_execve_raw, __NR_execve |
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104 | raw_syscall_easy g_clock_gettime_raw, __NR_clock_gettime |
105 | raw_syscall_easy g_rt_sigprocmask_raw, __NR_rt_sigprocmask |
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106 | raw_syscall_easy g_exit_group_raw, __NR_exit_group |