1// Assembly code for making arm syscalls. 2// 3// arm syscall argument register ordering is the similar to the arm 4// userspace argument register ordering except that the syscall number 5// (nr) is passed in r7. 6// 7// nr_last.rs takes care of reordering the nr argument to the end for us, 8// so we only need to move nr into r7 and take care of r4 and r5 if needed. 9 10 .file "arm.s" 11 .arch armv5t 12 13 .section .text.rustix_syscall0_nr_last,"ax",%progbits 14 .p2align 4 15 .weak rustix_syscall0_nr_last 16 .hidden rustix_syscall0_nr_last 17 .type rustix_syscall0_nr_last, %function 18rustix_syscall0_nr_last: 19 .fnstart 20 .cantunwind 21 push {r7, lr} 22 mov r7, r0 23 svc #0 24 pop {r7, pc} 25 .fnend 26 .size rustix_syscall0_nr_last, .-rustix_syscall0_nr_last 27 28 .section .text.rustix_syscall1_nr_last,"ax",%progbits 29 .p2align 4 30 .weak rustix_syscall1_nr_last 31 .hidden rustix_syscall1_nr_last 32 .type rustix_syscall1_nr_last, %function 33rustix_syscall1_nr_last: 34 .fnstart 35 .cantunwind 36 push {r7, lr} 37 mov r7, r1 38 svc #0 39 pop {r7, pc} 40 .fnend 41 .size rustix_syscall1_nr_last, .-rustix_syscall1_nr_last 42 43 .section .text.rustix_syscall1_noreturn_nr_last,"ax",%progbits 44 .p2align 4 45 .weak rustix_syscall1_noreturn_nr_last 46 .hidden rustix_syscall1_noreturn_nr_last 47 .type rustix_syscall1_noreturn_nr_last, %function 48rustix_syscall1_noreturn_nr_last: 49 .fnstart 50 .cantunwind 51 // Don't save r7 and lr; this is noreturn, so we'll never restore them. 52 mov r7, r1 53 svc #0 54 udf #16 // Trap instruction 55 .fnend 56 .size rustix_syscall1_noreturn_nr_last, .-rustix_syscall1_noreturn_nr_last 57 58 .section .text.rustix_syscall2_nr_last,"ax",%progbits 59 .p2align 4 60 .weak rustix_syscall2_nr_last 61 .hidden rustix_syscall2_nr_last 62 .type rustix_syscall2_nr_last, %function 63rustix_syscall2_nr_last: 64 .fnstart 65 .cantunwind 66 push {r7, lr} 67 mov r7, r2 68 svc #0 69 pop {r7, pc} 70 .fnend 71 .size rustix_syscall2_nr_last, .-rustix_syscall2_nr_last 72 73 .section .text.rustix_syscall3_nr_last,"ax",%progbits 74 .p2align 4 75 .weak rustix_syscall3_nr_last 76 .hidden rustix_syscall3_nr_last 77 .type rustix_syscall3_nr_last, %function 78rustix_syscall3_nr_last: 79 .fnstart 80 .cantunwind 81 push {r7, lr} 82 mov r7, r3 83 svc #0 84 pop {r7, pc} 85 .fnend 86 .size rustix_syscall3_nr_last, .-rustix_syscall3_nr_last 87 88 .section .text.rustix_syscall4_nr_last,"ax",%progbits 89 .p2align 4 90 .weak rustix_syscall4_nr_last 91 .hidden rustix_syscall4_nr_last 92 .type rustix_syscall4_nr_last, %function 93rustix_syscall4_nr_last: 94 .fnstart 95 .cantunwind 96 push {r7, lr} 97 ldr r7, [sp, #8] 98 svc #0 99 pop {r7, pc} 100 .fnend 101 .size rustix_syscall4_nr_last, .-rustix_syscall4_nr_last 102 103 .section .text.rustix_syscall5_nr_last,"ax",%progbits 104 .p2align 4 105 .weak rustix_syscall5_nr_last 106 .hidden rustix_syscall5_nr_last 107 .type rustix_syscall5_nr_last, %function 108rustix_syscall5_nr_last: 109 .fnstart 110 .cantunwind 111 push {r4, r7, r11, lr} 112 ldr r7, [sp, #20] 113 ldr r4, [sp, #16] 114 svc #0 115 pop {r4, r7, r11, pc} 116 .fnend 117 .size rustix_syscall5_nr_last, .-rustix_syscall5_nr_last 118 119 .section .text.rustix_syscall6_nr_last,"ax",%progbits 120 .p2align 4 121 .weak rustix_syscall6_nr_last 122 .hidden rustix_syscall6_nr_last 123 .type rustix_syscall6_nr_last, %function 124rustix_syscall6_nr_last: 125 .fnstart 126 .cantunwind 127 push {r4, r5, r7, lr} 128 add r7, sp, #16 129 ldm r7, {r4, r5, r7} 130 svc #0 131 pop {r4, r5, r7, pc} 132 .fnend 133 .size rustix_syscall6_nr_last, .-rustix_syscall6_nr_last 134 135 .section .note.GNU-stack,"",%progbits 136