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Heppokoyuki/sample.c

Created December 25, 2019 02:42
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risc-v assembly sample
Raw
sample.c
int
func(int a, int b)
{
return a + b;
}
int
main(void)
{
int c = func(2, 3);
int d = 56;
return c * d;
}
Raw
sample.c.disas
a.out: file format elf64-littleriscv
Disassembly of section .plt:
0000000000010360 <_PROCEDURE_LINKAGE_TABLE_>:
10360: 97 23 00 00 33 03 c3 41 03 be 03 ca 13 03 43 fd .#..3..A......C.
10370: 93 82 03 ca 13 53 13 00 83 b2 82 00 67 00 0e 00 .....S......g...
0000000000010380 <__libc_start_main@plt>:
10380: 00002e17 auipc t3,0x2
10384: c90e3e03 ld t3,-880(t3) # 12010 <__libc_start_main@GLIBC_2.27>
10388: 000e0367 jalr t1,t3
1038c: 00000013 nop
Disassembly of section .text:
0000000000010390 <_start>:
10390: 02e000ef jal ra,103be <_start+0x2e>
10394: 87aa mv a5,a0
10396: 00000517 auipc a0,0x0
1039a: 0d050513 addi a0,a0,208 # 10466 <main>
1039e: 6582 ld a1,0(sp)
103a0: 0030 addi a2,sp,8
103a2: ff017113 andi sp,sp,-16
103a6: 00000697 auipc a3,0x0
103aa: 0f668693 addi a3,a3,246 # 1049c <__libc_csu_init>
103ae: 00000717 auipc a4,0x0
103b2: 14670713 addi a4,a4,326 # 104f4 <__libc_csu_fini>
103b6: 880a mv a6,sp
103b8: fc9ff0ef jal ra,10380 <__libc_start_main@plt>
103bc: 9002 ebreak
103be: 00002197 auipc gp,0x2
103c2: 44218193 addi gp,gp,1090 # 12800 <__global_pointer$>
103c6: 8082 ret
...
00000000000103ca <deregister_tm_clones>:
103ca: 6549 lui a0,0x12
103cc: 6749 lui a4,0x12
103ce: 00050793 mv a5,a0
103d2: 00070713 mv a4,a4
103d6: 00f70b63 beq a4,a5,103ec <deregister_tm_clones+0x22>
103da: 00000337 lui t1,0x0
103de: 00030313 mv t1,t1
103e2: 00030563 beqz t1,103ec <deregister_tm_clones+0x22>
103e6: 00050513 mv a0,a0
103ea: 8302 jr t1
103ec: 8082 ret
00000000000103ee <register_tm_clones>:
103ee: 6549 lui a0,0x12
103f0: 00050593 mv a1,a0
103f4: 67c9 lui a5,0x12
103f6: 00078793 mv a5,a5
103fa: 8f8d sub a5,a5,a1
103fc: 4037d713 srai a4,a5,0x3
10400: 03f7d593 srli a1,a5,0x3f
10404: 95ba add a1,a1,a4
10406: 8585 srai a1,a1,0x1
10408: c991 beqz a1,1041c <register_tm_clones+0x2e>
1040a: 00000337 lui t1,0x0
1040e: 00030313 mv t1,t1
10412: 00030563 beqz t1,1041c <register_tm_clones+0x2e>
10416: 00050513 mv a0,a0
1041a: 8302 jr t1
1041c: 8082 ret
000000000001041e <__do_global_dtors_aux>:
1041e: 1141 addi sp,sp,-16
10420: e022 sd s0,0(sp)
10422: 8301c783 lbu a5,-2000(gp) # 12030 <_edata>
10426: e406 sd ra,8(sp)
10428: e791 bnez a5,10434 <__do_global_dtors_aux+0x16>
1042a: fa1ff0ef jal ra,103ca <deregister_tm_clones>
1042e: 4785 li a5,1
10430: 82f18823 sb a5,-2000(gp) # 12030 <_edata>
10434: 60a2 ld ra,8(sp)
10436: 6402 ld s0,0(sp)
10438: 0141 addi sp,sp,16
1043a: 8082 ret
000000000001043c <frame_dummy>:
1043c: bf4d j 103ee <register_tm_clones>
000000000001043e <func>:
1043e: 1101 addi sp,sp,-32
10440: ec22 sd s0,24(sp)
10442: 1000 addi s0,sp,32
10444: 87aa mv a5,a0
10446: 872e mv a4,a1
10448: fef42623 sw a5,-20(s0)
1044c: 87ba mv a5,a4
1044e: fef42423 sw a5,-24(s0)
10452: fec42703 lw a4,-20(s0)
10456: fe842783 lw a5,-24(s0)
1045a: 9fb9 addw a5,a5,a4
1045c: 2781 sext.w a5,a5
1045e: 853e mv a0,a5
10460: 6462 ld s0,24(sp)
10462: 6105 addi sp,sp,32
10464: 8082 ret
0000000000010466 <main>:
10466: 1101 addi sp,sp,-32
10468: ec06 sd ra,24(sp)
1046a: e822 sd s0,16(sp)
1046c: 1000 addi s0,sp,32
1046e: 458d li a1,3
10470: 4509 li a0,2
10472: fcdff0ef jal ra,1043e <func>
10476: 87aa mv a5,a0
10478: fef42623 sw a5,-20(s0)
1047c: 03800793 li a5,56
10480: fef42423 sw a5,-24(s0)
10484: fec42703 lw a4,-20(s0)
10488: fe842783 lw a5,-24(s0)
1048c: 02f707bb mulw a5,a4,a5
10490: 2781 sext.w a5,a5
10492: 853e mv a0,a5
10494: 60e2 ld ra,24(sp)
10496: 6442 ld s0,16(sp)
10498: 6105 addi sp,sp,32
1049a: 8082 ret
000000000001049c <__libc_csu_init>:
1049c: 7139 addi sp,sp,-64
1049e: f822 sd s0,48(sp)
104a0: f04a sd s2,32(sp)
104a2: 00002417 auipc s0,0x2
104a6: 97e40413 addi s0,s0,-1666 # 11e20 <__frame_dummy_init_array_entry>
104aa: 00002917 auipc s2,0x2
104ae: 97e90913 addi s2,s2,-1666 # 11e28 <__init_array_end>
104b2: 40890933 sub s2,s2,s0
104b6: fc06 sd ra,56(sp)
104b8: f426 sd s1,40(sp)
104ba: ec4e sd s3,24(sp)
104bc: e852 sd s4,16(sp)
104be: e456 sd s5,8(sp)
104c0: 40395913 srai s2,s2,0x3
104c4: 00090f63 beqz s2,104e2 <__libc_csu_init+0x46>
104c8: 89aa mv s3,a0
104ca: 8a2e mv s4,a1
104cc: 8ab2 mv s5,a2
104ce: 4481 li s1,0
104d0: 601c ld a5,0(s0)
104d2: 8656 mv a2,s5
104d4: 85d2 mv a1,s4
104d6: 854e mv a0,s3
104d8: 0485 addi s1,s1,1
104da: 9782 jalr a5
104dc: 0421 addi s0,s0,8
104de: fe9919e3 bne s2,s1,104d0 <__libc_csu_init+0x34>
104e2: 70e2 ld ra,56(sp)
104e4: 7442 ld s0,48(sp)
104e6: 74a2 ld s1,40(sp)
104e8: 7902 ld s2,32(sp)
104ea: 69e2 ld s3,24(sp)
104ec: 6a42 ld s4,16(sp)
104ee: 6aa2 ld s5,8(sp)
104f0: 6121 addi sp,sp,64
104f2: 8082 ret
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