123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869 |
- #include <features.h>
- #include <bits/arm_asm.h>
- #include <bits/arm_bx.h>
- .text
- .global syscall
- .type syscall,%function
- .align 4
- #if defined(THUMB1_ONLY)
- .thumb_func
- syscall:
- push {r4, r5, r6, r7}
- mov ip, r0
- mov r0, r1
- mov r1, r2
- mov r2, r3
- add r7, sp, #(4 * 4)
- ldmia r7!, {r3, r4, r5, r6}
- mov r7, ip
- swi 0x0
- pop {r4, r5, r6, r7}
- ldr r1, =0xfffff000
- cmp r0, r1
- bcs 1f
- bx lr
- 1:
- push {r3, lr}
- bl __syscall_error
- POP_RET
- .pool
- #else
- syscall:
- mov ip, sp
- stmfd sp!, {r4, r5, r6, r7}
- mov r7, r0
- mov r0, r1
- mov r1, r2
- mov r2, r3
- ldmfd ip, {r3, r4, r5, r6}
- swi 0x0
- ldmfd sp!, {r4, r5, r6, r7}
- cmn r0, #4096
- IT(t, cc)
- BXC(cc, lr)
- b __syscall_error
- #endif
- .size syscall,.-syscall
|