syscall.s (455B)
1 .global __syscall 2 .hidden __syscall 3 .type __syscall,@function 4 __syscall: 5 movq %rdi, %rax /* syscall number */ 6 movq %rsi, %rdi /* arg1 (was C arg2) */ 7 movq %rdx, %rsi /* arg2 (was C arg3) */ 8 movq %rcx, %rdx /* arg3 (was C arg4) */ 9 movq %r8, %r10 /* arg4 (kernel uses r10, not rcx) */ 10 movq %r9, %r8 /* arg5 */ 11 movq 8(%rsp), %r9 /* arg6 from stack */ 12 syscall 13 ret