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annotate doc/disas_examples/x86.plan9call.disas @ 351:6b37ccbb2f91

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Added tag r1.1-RC4 for changeset 127fe78cb7dd
author Tassilo Philipp
date Fri, 10 Jan 2020 13:29:49 +0100
parents c0390dc85a07
children 97fff5d9cea1
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1 ; void leaf_call(int a, int b, int c, int d, int e, int f)
c0390dc85a07 - doc: added disassembly examples for many platforms and calling conventions, for reference
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2 ; {
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3 ; }
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4 ;
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5 ; int nonleaf_call(int a, int b, int c, int d, int e, int f, int g)
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6 ; {
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7 ; leaf_call(b,c,d,e,f,g);
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8 ; return 'x';
c0390dc85a07 - doc: added disassembly examples for many platforms and calling conventions, for reference
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9 ; }
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10 ;
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11 ; int main()
c0390dc85a07 - doc: added disassembly examples for many platforms and calling conventions, for reference
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12 ; {
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13 ; nonleaf_call(0,1,2,3,4,5,6);
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14 ; return 0;
c0390dc85a07 - doc: added disassembly examples for many platforms and calling conventions, for reference
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15 ; }
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19 ; output from plan9-4th_edition-x86 w/ 8c x.c && 8l -a x.8
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20
c0390dc85a07 - doc: added disassembly examples for many platforms and calling conventions, for reference
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21 001020 (1) TEXT leaf_call+0(SB),$0
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22 001020 c3 (3) RET ,
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c0390dc85a07 - doc: added disassembly examples for many platforms and calling conventions, for reference
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24 001021 (5) TEXT nonleaf_call+0(SB),$28
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25 001021 83ec1c (5) SUBL $28,SP ; prolog (note, there is no register save area at all)
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26 001024 8b442424 (7) MOVL b+36(FP),AX ; |
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27 001028 890424 (7) MOVL AX,(SP) ; |
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28 00102b 8b442428 (7) MOVL c+40(FP),AX ; |
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29 00102f 89442404 (7) MOVL AX,4(SP) ; |
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30 001033 8b44242c (7) MOVL d+44(FP),AX ; |
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31 001037 89442408 (7) MOVL AX,8(SP) ; | fetch in args from prev frame's param area ...
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32 00103b 8b442430 (7) MOVL e+48(FP),AX ; | ... and "push" onto stack
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33 00103f 8944240c (7) MOVL AX,12(SP) ; |
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34 001043 8b442434 (7) MOVL f+52(FP),AX ; |
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35 001047 89442410 (7) MOVL AX,16(SP) ; |
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36 00104b 8b442438 (7) MOVL g+56(FP),AX ; |
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37 00104f 89442414 (7) MOVL AX,20(SP) ; |
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38 001053 e8c8ffffff (7) CALL ,1020+leaf_call ; push return addrss and call
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39 001058 b878000000 (8) MOVL $120,AX ; return value: 'x' -> eax
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40 00105d 83c41c (8) ADDL $28,SP ; |
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41 001060 c3 (8) RET , ; | epilog
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42
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43 001061 (11) TEXT main+0(SB),$32
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44 001061 83ec20 (11) SUBL $32,SP ; prolog (note, there is no register save area at all)
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45 001064 c7042400000000 (13) MOVL $0,(SP) ; arg 0 -> "push" onto stack
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46 00106b b801000000 (13) MOVL $1,AX ; arg 1 -> eax, then ...
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47 001070 89442404 (13) MOVL AX,4(SP) ; ... "pushed" onto stack
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48 001074 b802000000 (13) MOVL $2,AX ; arg 2 -> eax, then ...
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49 001079 89442408 (13) MOVL AX,8(SP) ; ... "pushed" onto stack
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50 00107d b803000000 (13) MOVL $3,AX ; .
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51 001082 8944240c (13) MOVL AX,12(SP) ; .
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52 001086 b804000000 (13) MOVL $4,AX ; .
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53 00108b 89442410 (13) MOVL AX,16(SP) ; .
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54 00108f b805000000 (13) MOVL $5,AX ; .
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55 001094 89442414 (13) MOVL AX,20(SP) ; .
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56 001098 b806000000 (13) MOVL $6,AX ; arg 6 -> eax, then ...
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57 00109d 89442418 (13) MOVL AX,24(SP) ; ... "pushed" onto stack
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58 0010a1 e87bffffff (13) CALL ,1021+nonleaf_call ; push return addrss and call
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59 0010a6 31c0 (14) MOVL $0,AX ; return value
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60 0010a8 83c420 (14) ADDL $32,SP ; |
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61 0010ab c3 (14) RET , ; | epilog
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63 ; vim: ft=asm
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