kernel/swtch.S

1# Context switch2#3#   void swtch(struct context *old, struct context *new);4# 5# Save current registers in old. Load from new.	678.globl swtch9swtch:10        sd ra, 0(a0)11        sd sp, 8(a0)12        sd s0, 16(a0)13        sd s1, 24(a0)14        sd s2, 32(a0)15        sd s3, 40(a0)16        sd s4, 48(a0)17        sd s5, 56(a0)18        sd s6, 64(a0)19        sd s7, 72(a0)20        sd s8, 80(a0)21        sd s9, 88(a0)22        sd s10, 96(a0)23        sd s11, 104(a0)2425        ld ra, 0(a1)26        ld sp, 8(a1)27        ld s0, 16(a1)28        ld s1, 24(a1)29        ld s2, 32(a1)30        ld s3, 40(a1)31        ld s4, 48(a1)32        ld s5, 56(a1)33        ld s6, 64(a1)34        ld s7, 72(a1)35        ld s8, 80(a1)36        ld s9, 88(a1)37        ld s10, 96(a1)38        ld s11, 104(a1)39        40        ret4142	43