PCSpim
Introduction
Register content
Program
Memory content
Message
Register Content
PC
Status
R0
R1
R2
R3
R4
R5
R6
R7
= 00000000
= 3000ff10
(r0) = 00000000
(at) = 00000000
(v0) = 00000000
(v1) = 00000000
(a0) = 00000000
(a1) = 00000000
(a2) = 00000000
(a3) = 00000000
FIR
FENR
= 00000000
Cause
= 00000000
BadVAddr= 00000000
= 00000000
LO
= 00000000
General Registers
R8 (t0) = 00000000 R16 (s0) = 00000000 R24 (t8) = 00000000
R9 (t1) = 00000000 R17 (s1) = 00000000 R25 (t9) = 00000000
R10 (t2) = 00000000 R18 (s2) = 00000000 R26 (k0) = 00000000
R11 (t3) = 00000000 R19 (s3) = 00000000 R27 (k1) = 00000000
R12 (t4) = 00000000 R20 (s4) = 00000000 R28 (gp) = 10008000
R13 (t5) = 00000000 R21 (s5) = 00000000 R29 (sp) = 7fffeffc
R14 (t6) = 00000000 R22 (s6) = 00000000 R30 (s8) = 00000000
R15 (t7) = 00000000 R23 (s7) = 00000000 R31 (ra) = 00000000
= 00009800
= 00000000
FP0
FP2
FP4
FP6
= 0.000000
= 0.000000
= 0.000000
= 0.000000
FP0
FP1
FP2
FP3
FP4
FP5
FP6
FP7
= 0.000000
= 0.000000
= 0.000000
= 0.000000
= 0.000000
= 0.000000
= 0.000000
= 0.000000
EPC
HI
FCSR
= 00000000
FCCR
= 00000000
FEXR
= 00000000
Double Floating Point Registers
FP8 = 0.000000
FP16 = 0.000000
FP24 = 0.000000
FP10 = 0.000000
FP18 = 0.000000
FP26 = 0.000000
FP12 = 0.000000
FP20 = 0.000000
FP28 = 0.000000
FP14 = 0.000000
FP22 = 0.000000
FP30 = 0.000000
Single Floating Point Registers
FP8 = 0.000000
FP16 = 0.000000
FP24 = 0.000000
FP9 = 0.000000
FP17 = 0.000000
FP25 = 0.000000
FP10 = 0.000000
FP18 = 0.000000
FP26 = 0.000000
FP11 = 0.000000
FP19 = 0.000000
FP27 = 0.000000
FP12 = 0.000000
FP20 = 0.000000
FP28 = 0.000000
FP13 = 0.000000
FP21 = 0.000000
FP29 = 0.000000
FP14 = 0.000000
FP22 = 0.000000
FP30 = 0.000000
FP15 = 0.000000
FP23 = 0.000000
FP31 = 0.000000
Program
[0x00400000]
[0x00400004]
[0x00400008]
[0x0040000c]
[0x00400010]
[0x00400014]
[0x00400018]
[0x0040001c]
[0x00400020]
KERNEL
[0x80000180]
[0x80000184]
[0x8000018c]
[0x80000190]
[0x80000194]
[0x80000198]
[0x8000019c]
[0x800001a0]
[0x800001a4]
[0x800001a8]
[0x800001ac]
[0x800001b0]
[0x800001b4]
[0x800001b8]
[0x800001bc]
[0x800001c0]
[0x800001c4]
[0x800001c8]
...
0x8fa40000
0x27a50004
0x24a60004
0x00041080
0x00c23021
0x0c000000
0x00000000
0x3402000a
0x0000000c
address
0x0001d821
0x3c019000
0x3c019000
0xac240204
0x401a6800
0x001a2082
0x3084001f
0x34020004
0x3c049000
0x0000000c
0x34020001
0x001a2082
0x3084001f
0x0000000c
0x34020004
0x3344003c
0x3c019000
0x00240821
lw $4, 0($29) ; 175: lw $a0 0($sp) # argc
addiu $5, $29, 4
; 176: addiu $a1 $sp 4 # argv
addiu $6, $5, 4
; 177: addiu $a2 $a1 4 # envp
sll $2, $4, 2
; 178: sll $v0 $a0 2
addu $6, $6, $2
; 179: addu $a2 $a2 $v0
jal 0x00000000 [main] ; 180: jal main
nop
; 181: nop
ori $2, $0, 10
; 183: li $v0 10
syscall
; 184: syscall
# syscall(exit)
machine code
Assembly code
addu $27, $0, $1
; 82: move $k1 $at
lui $1, -28672
; 84: sw $v0 s1
lui $1, -28672
; 85: sw $a0 s2
comment
sw $4, 516($1)
mfc0 $26, $13
; 87: mfc0 $k0 $13
srl $4, $26, 2
; 88: srl $a0 $k0 2
andi $4, $4, 31
; 89: andi $a0 $a0 0x1f
ori $2, $0, 4
; 93: li $v0 4
# print_str
lui $4, -28672 [__m1_]; 94: la $a0 __m1_
syscall
; 95: syscall
ori $2, $0, 1
; 97: li $v0 1
# print_int
srl $4, $26, 2
; 98: srl $a0 $k0 2
andi $4, $4, 31
; 99: andi $a0 $a0 0x1f
syscall
; 100: syscall
ori $2, $0, 4
; 102: li $v0 4
# print_str
andi $4, $26, 60
; 103: andi $a0 $k0 0x3c
lui $1, -28672
; 104: lw $a0 __excp($a0)
addu $1, $1, $4
Memory
DATA
[0x10000000]...[0x10040000]
STACK
[0x7fffeffc]
KERNEL DATA
[0x90000000]
[0x90000010]
[0x90000020]
[0x90000030]
[0x90000040]
[0x90000050]
[0x90000060]
[0x90000070]
...
address
0x00000000
0x00000000
0x78452020
0x72727563
0x000a6465
0x2000205d
0x20005d42
0x73657264
0x2f74736e
0x5b202000
0x74706563 0x206e6f69 0x636f2000
0x61206465 0x6920646e 0x726f6e67
0x495b2020 0x7265746e 0x74707572
0x4c545b20 0x20005d42 0x4c545b20
0x4c545b20 0x20005d42 0x64415b20
0x72652073 0x20726f72 0x69206e69
0x61746164 0x74656620 0x205d6863
0x72646441 0x20737365 0x6f727265
content