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trap_entry.S
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.file trap_entry.S
.text.trap_entry
.option norvc
.type _trap_entry, @function
.global _trap_entry
_trap_entry:
.cfi_startproc
/* Allocate stack space */
addi sp, sp, -31 * 8
/* Push registers */
sd ra, 0 * 8(sp)
sd sp, 1 * 8(sp)
sd gp, 2 * 8(sp)
sd tp, 3 * 8(sp)
sd t0, 4 * 8(sp)
sd t1, 5 * 8(sp)
sd t2, 6 * 8(sp)
sd s0, 7 * 8(sp)
sd s1, 8 * 8(sp)
sd a0, 9 * 8(sp)
sd a1, 10 * 8(sp)
sd a2, 11 * 8(sp)
sd a3, 12 * 8(sp)
sd a4, 13 * 8(sp)
sd a5, 14 * 8(sp)
sd a6, 15 * 8(sp)
sd a7, 16 * 8(sp)
sd s2, 17 * 8(sp)
sd s3, 18 * 8(sp)
sd s4, 19 * 8(sp)
sd s5, 20 * 8(sp)
sd s6, 21 * 8(sp)
sd s7, 22 * 8(sp)
sd s8, 23 * 8(sp)
sd s9, 24 * 8(sp)
sd s10, 25 * 8(sp)
sd s11, 26 * 8(sp)
sd t3, 27 * 8(sp)
sd t4, 28 * 8(sp)
sd t5, 29 * 8(sp)
sd t6, 30 * 8(sp)
mv a0, sp
call trap
/* Pop registers */
ld ra, 0 * 8(sp)
ld sp, 1 * 8(sp)
ld gp, 2 * 8(sp)
ld tp, 3 * 8(sp)
ld t0, 4 * 8(sp)
ld t1, 5 * 8(sp)
ld t2, 6 * 8(sp)
ld s0, 7 * 8(sp)
ld s1, 8 * 8(sp)
ld a0, 9 * 8(sp)
ld a1, 10 * 8(sp)
ld a2, 11 * 8(sp)
ld a3, 12 * 8(sp)
ld a4, 13 * 8(sp)
ld a5, 14 * 8(sp)
ld a6, 15 * 8(sp)
ld a7, 16 * 8(sp)
ld s2, 17 * 8(sp)
ld s3, 18 * 8(sp)
ld s4, 19 * 8(sp)
ld s5, 20 * 8(sp)
ld s6, 21 * 8(sp)
ld s7, 22 * 8(sp)
ld s8, 23 * 8(sp)
ld s9, 24 * 8(sp)
ld s10, 25 * 8(sp)
ld s11, 26 * 8(sp)
ld t3, 27 * 8(sp)
ld t4, 28 * 8(sp)
ld t5, 29 * 8(sp)
ld t6, 30 * 8(sp)
/* Deallocate stack space */
addi sp, sp, 31 * 8
sret