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view doc/disas_examples/sparc.sparc.disas @ 327:c0390dc85a07
- doc: added disassembly examples for many platforms and calling conventions, for reference
| author | Tassilo Philipp |
|---|---|
| date | Fri, 22 Nov 2019 23:08:59 +0100 |
| parents | |
| children | c73c59c8b553 |
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; #include <stdlib.h> ; ; void leaf_call(int b, int c, int d, int e, int f, int g, int h) ; { ; } ; ; void nonleaf_call(int a, int b, int c, int d, int e, int f, int g, int h) ; { ; /* use some local data */ ; *(char*)alloca(220) = 'L'; ; leaf_call(b, c, d, e, f, g, h); ; } ; ; int main() ; { ; nonleaf_call(0, 1, 2, 3, 4, 5, 6, 7); ; return 0; ; } ; output from debian-4.0_r3-sparc w/ gcc 4.1.2 00000000 <leaf_call>: 0: 9d e3 bf 98 save %sp, -104, %sp 4: f0 27 a0 44 st %i0, [ %fp + 0x44 ] 8: f2 27 a0 48 st %i1, [ %fp + 0x48 ] c: f4 27 a0 4c st %i2, [ %fp + 0x4c ] 10: f6 27 a0 50 st %i3, [ %fp + 0x50 ] 14: f8 27 a0 54 st %i4, [ %fp + 0x54 ] 18: fa 27 a0 58 st %i5, [ %fp + 0x58 ] 1c: 81 e8 00 00 restore 20: 81 c3 e0 08 retl 24: 01 00 00 00 nop 00000028 <nonleaf_call>: 28: 9d e3 bf 88 save %sp, -120, %sp ; prolog 2c: f0 27 a0 44 st %i0, [ %fp + 0x44 ] ; | 30: f2 27 a0 48 st %i1, [ %fp + 0x48 ] ; | 34: f4 27 a0 4c st %i2, [ %fp + 0x4c ] ; | write input to prev frame's spill area 38: f6 27 a0 50 st %i3, [ %fp + 0x50 ] ; | (e.g. offset = 68 for i0, jumping over i*/l* save area and aggregate return pointer) 3c: f8 27 a0 54 st %i4, [ %fp + 0x54 ] ; | 40: fa 27 a0 58 st %i5, [ %fp + 0x58 ] ; | 44: 9c 03 bf 20 add %sp, -224, %sp ; alloca(220) - with 4b padding (multiple of 8), and ... 48: 82 03 a0 64 add %sp, 0x64, %g1 ; ... at least 100b at top of stack, via ... 4c: c2 27 bf f4 st %g1, [ %fp + -12 ] ; ... local space (pointlessly) ... 50: c4 07 bf f4 ld [ %fp + -12 ], %g2 ; ... to g2 54: 82 00 a0 07 add %g2, 7, %g1 ; | 58: 83 30 60 03 srl %g1, 3, %g1 ; | 8b alignment of alloca()'d space pointed to by g1 5c: 83 28 60 03 sll %g1, 3, %g1 ; | 60: c2 27 bf f4 st %g1, [ %fp + -12 ] ; free g1 again by copy via temp space, ... 64: c4 07 bf f4 ld [ %fp + -12 ], %g2 ; ... to g2 68: 82 10 20 4c mov 0x4c, %g1 ; 'L' -> g1, and ... 6c: c2 28 80 00 stb %g1, [ %g2 ] ; ... store in aligned alloca()'d space 70: c2 07 a0 60 ld [ %fp + 0x60 ], %g1 ; arg 6 (fetched from prev frame's stack param area), and ... 74: c2 23 a0 5c st %g1, [ %sp + 0x5c ] ; ... "pushed" onto stack 78: d0 07 a0 48 ld [ %fp + 0x48 ], %o0 ; | 7c: d2 07 a0 4c ld [ %fp + 0x4c ], %o1 ; | 80: d4 07 a0 50 ld [ %fp + 0x50 ], %o2 ; | 84: d6 07 a0 54 ld [ %fp + 0x54 ], %o3 ; | arg 0,1,2,3,4 (fetched from prev frame's spill area) 88: d8 07 a0 58 ld [ %fp + 0x58 ], %o4 ; | 8c: da 07 a0 5c ld [ %fp + 0x5c ], %o5 ; arg 5 (fetched from prev frame's stack param area) 90: 40 00 00 00 call 90 <nonleaf_call+0x68> ; call leaf_call (objdump not from final link but .o) 94: 01 00 00 00 nop ; branch delay slot 98: 81 e8 00 00 restore ; | 9c: 81 c3 e0 08 retl ; | epilog a0: 01 00 00 00 nop ; | branch delay slot 000000a4 <main>: a4: 9d e3 bf 90 save %sp, -112, %sp ; prolog a8: 82 10 20 06 mov 6, %g1 ; arg 6, ... ac: c2 23 a0 5c st %g1, [ %sp + 0x5c ] ; ... "pushed" onto stack b0: 82 10 20 07 mov 7, %g1 ; arg 7, ... b4: c2 23 a0 60 st %g1, [ %sp + 0x60 ] ; ... "pushed" onto stack b8: 90 10 20 00 clr %o0 ; arg 0 bc: 92 10 20 01 mov 1, %o1 ; arg 1 c0: 94 10 20 02 mov 2, %o2 ; arg 2 c4: 96 10 20 03 mov 3, %o3 ; arg 3 c8: 98 10 20 04 mov 4, %o4 ; arg 4 cc: 9a 10 20 05 mov 5, %o5 ; arg 5 d0: 40 00 00 00 call d0 <main+0x2c> ; call nonleaf_call (objdump not from final link but .o) d4: 01 00 00 00 nop ; branch delay slot d8: 82 10 20 00 clr %g1 ! 0 <leaf_call> ; | dc: b0 10 00 01 mov %g1, %i0 ; / return value e0: 81 e8 00 00 restore ; \ e4: 81 c3 e0 08 retl ; | epilog e8: 01 00 00 00 nop ; | branch delay slot ; output from netbsd-6.0-sparc w/ gcc 4.5.3 00000000 <leaf_call>: 0: 9d e3 bf a0 save %sp, -96, %sp 4: f0 27 a0 44 st %i0, [ %fp + 0x44 ] 8: f2 27 a0 48 st %i1, [ %fp + 0x48 ] c: f4 27 a0 4c st %i2, [ %fp + 0x4c ] 10: f6 27 a0 50 st %i3, [ %fp + 0x50 ] 14: f8 27 a0 54 st %i4, [ %fp + 0x54 ] 18: fa 27 a0 58 st %i5, [ %fp + 0x58 ] 1c: 81 e8 00 00 restore 20: 81 c3 e0 08 retl 24: 01 00 00 00 nop 00000028 <nonleaf_call>: 28: 9d e3 bf 98 save %sp, -104, %sp 2c: f0 27 a0 44 st %i0, [ %fp + 0x44 ] 30: f2 27 a0 48 st %i1, [ %fp + 0x48 ] 34: f4 27 a0 4c st %i2, [ %fp + 0x4c ] 38: f6 27 a0 50 st %i3, [ %fp + 0x50 ] 3c: f8 27 a0 54 st %i4, [ %fp + 0x54 ] 40: fa 27 a0 58 st %i5, [ %fp + 0x58 ] 44: 9c 03 bf 20 add %sp, -224, %sp 48: 82 03 a0 64 add %sp, 0x64, %g1 4c: 82 00 60 07 add %g1, 7, %g1 50: 83 30 60 03 srl %g1, 3, %g1 54: 83 28 60 03 sll %g1, 3, %g1 58: 84 10 20 4c mov 0x4c, %g2 5c: c4 28 40 00 stb %g2, [ %g1 ] 60: c2 07 a0 60 ld [ %fp + 0x60 ], %g1 64: c2 23 a0 5c st %g1, [ %sp + 0x5c ] 68: d0 07 a0 48 ld [ %fp + 0x48 ], %o0 6c: d2 07 a0 4c ld [ %fp + 0x4c ], %o1 70: d4 07 a0 50 ld [ %fp + 0x50 ], %o2 74: d6 07 a0 54 ld [ %fp + 0x54 ], %o3 78: d8 07 a0 58 ld [ %fp + 0x58 ], %o4 7c: da 07 a0 5c ld [ %fp + 0x5c ], %o5 80: 40 00 00 00 call 80 <nonleaf_call+0x58> 84: 01 00 00 00 nop 88: 81 e8 00 00 restore 8c: 81 c3 e0 08 retl 90: 01 00 00 00 nop 00000094 <main>: 94: 9d e3 bf 98 save %sp, -104, %sp 98: 82 10 20 06 mov 6, %g1 9c: c2 23 a0 5c st %g1, [ %sp + 0x5c ] a0: 82 10 20 07 mov 7, %g1 a4: c2 23 a0 60 st %g1, [ %sp + 0x60 ] a8: 90 10 20 00 clr %o0 ac: 92 10 20 01 mov 1, %o1 b0: 94 10 20 02 mov 2, %o2 b4: 96 10 20 03 mov 3, %o3 b8: 98 10 20 04 mov 4, %o4 bc: 9a 10 20 05 mov 5, %o5 c0: 40 00 00 00 call c0 <main+0x2c> c4: 01 00 00 00 nop c8: 82 10 20 00 clr %g1 ! 0 <leaf_call> cc: b0 10 00 01 mov %g1, %i0 d0: 81 e8 00 00 restore d4: 81 c3 e0 08 retl d8: 01 00 00 00 nop ; output from openbsd-5.8-sparc w/ gcc 4.2.1 00000000 <leaf_call>: 0: 9d e3 bf 90 save %sp, -112, %sp 4: f0 27 a0 44 st %i0, [ %fp + 0x44 ] 8: f2 27 a0 48 st %i1, [ %fp + 0x48 ] c: f4 27 a0 4c st %i2, [ %fp + 0x4c ] 10: f6 27 a0 50 st %i3, [ %fp + 0x50 ] 14: f8 27 a0 54 st %i4, [ %fp + 0x54 ] 18: fa 27 a0 58 st %i5, [ %fp + 0x58 ] 1c: 81 e8 00 00 restore 20: 81 c3 e0 08 retl 24: 01 00 00 00 nop 28: ae 03 c0 17 add %o7, %l7, %l7 2c: 81 c3 e0 08 retl 30: 01 00 00 00 nop 00000034 <nonleaf_call>: 34: 9d e3 bf 80 save %sp, -128, %sp 38: 2f 00 00 00 sethi %hi(0), %l7 3c: ae 05 e0 00 add %l7, 0, %l7 ! 0 <leaf_call> 40: 7f ff ff fa call 28 <leaf_call+0x28> 44: 01 00 00 00 nop 48: f0 27 a0 44 st %i0, [ %fp + 0x44 ] 4c: f2 27 a0 48 st %i1, [ %fp + 0x48 ] 50: f4 27 a0 4c st %i2, [ %fp + 0x4c ] 54: f6 27 a0 50 st %i3, [ %fp + 0x50 ] 58: f8 27 a0 54 st %i4, [ %fp + 0x54 ] 5c: fa 27 a0 58 st %i5, [ %fp + 0x58 ] 60: 03 00 00 00 sethi %hi(0), %g1 64: 82 10 60 00 mov %g1, %g1 ! 0 <leaf_call> 68: c2 05 c0 01 ld [ %l7 + %g1 ], %g1 6c: c4 00 40 00 ld [ %g1 ], %g2 70: c4 27 bf f4 st %g2, [ %fp + -12 ] 74: 84 10 20 00 clr %g2 78: 9c 03 bf 20 add %sp, -224, %sp 7c: 86 03 a0 64 add %sp, 0x64, %g3 80: c6 27 bf ec st %g3, [ %fp + -20 ] 84: c4 07 bf ec ld [ %fp + -20 ], %g2 88: 82 00 a0 07 add %g2, 7, %g1 8c: 83 30 60 03 srl %g1, 3, %g1 90: 83 28 60 03 sll %g1, 3, %g1 94: c2 27 bf ec st %g1, [ %fp + -20 ] 98: c4 07 bf ec ld [ %fp + -20 ], %g2 9c: 82 10 20 4c mov 0x4c, %g1 a0: c2 28 80 00 stb %g1, [ %g2 ] a4: c2 07 a0 60 ld [ %fp + 0x60 ], %g1 a8: c2 23 a0 5c st %g1, [ %sp + 0x5c ] ac: d0 07 a0 48 ld [ %fp + 0x48 ], %o0 b0: d2 07 a0 4c ld [ %fp + 0x4c ], %o1 b4: d4 07 a0 50 ld [ %fp + 0x50 ], %o2 b8: d6 07 a0 54 ld [ %fp + 0x54 ], %o3 bc: d8 07 a0 58 ld [ %fp + 0x58 ], %o4 c0: da 07 a0 5c ld [ %fp + 0x5c ], %o5 c4: 40 00 00 00 call c4 <nonleaf_call+0x90> c8: 01 00 00 00 nop cc: 03 00 00 00 sethi %hi(0), %g1 d0: 82 10 60 00 mov %g1, %g1 ! 0 <leaf_call> d4: c2 05 c0 01 ld [ %l7 + %g1 ], %g1 d8: c6 07 bf f4 ld [ %fp + -12 ], %g3 dc: c4 00 40 00 ld [ %g1 ], %g2 e0: 86 98 c0 02 xorcc %g3, %g2, %g3 e4: 84 10 20 00 clr %g2 e8: 02 80 00 08 be 108 <nonleaf_call+0xd4> ec: 01 00 00 00 nop f0: 03 00 00 00 sethi %hi(0), %g1 f4: 82 10 60 00 mov %g1, %g1 ! 0 <leaf_call> f8: c2 05 c0 01 ld [ %l7 + %g1 ], %g1 fc: 90 10 00 01 mov %g1, %o0 100: 40 00 00 00 call 100 <nonleaf_call+0xcc> 104: 01 00 00 00 nop 108: 81 e8 00 00 restore 10c: 81 c3 e0 08 retl 110: 01 00 00 00 nop 00000114 <main>: 114: 9d e3 bf 88 save %sp, -120, %sp 118: 82 10 20 06 mov 6, %g1 11c: c2 23 a0 5c st %g1, [ %sp + 0x5c ] 120: 82 10 20 07 mov 7, %g1 124: c2 23 a0 60 st %g1, [ %sp + 0x60 ] 128: 90 10 20 00 clr %o0 12c: 92 10 20 01 mov 1, %o1 130: 94 10 20 02 mov 2, %o2 134: 96 10 20 03 mov 3, %o3 138: 98 10 20 04 mov 4, %o4 13c: 9a 10 20 05 mov 5, %o5 140: 40 00 00 00 call 140 <main+0x2c> 144: 01 00 00 00 nop 148: 82 10 20 00 clr %g1 ! 0 <leaf_call> 14c: b0 10 00 01 mov %g1, %i0 150: 81 e8 00 00 restore 154: 81 c3 e0 08 retl 158: 01 00 00 00 nop ; --------------------- with float params and aggregate return value -------------------> ; #include <stdlib.h> ; ; void leaf_call(int b, float c, int d, float e, int f, int g, int h) ; { ; } ; ; struct aggr { int x; int y; int z; }; ; ; struct aggr nonleaf_call(int a, int b, float c, int d, float e, int f, int g, int h) ; { ; struct aggr st = { b, d, f }; ; /* use some local data */ ; *(char*)alloca(220) = 'L'; ; leaf_call(b, c, d, e, f, g, h); ; ; return st; ; } ; ; int main() ; { ; struct aggr st = nonleaf_call(0, 1, 2.f, 3, 4.f, 5, 6, 7); ; return 0; ; } ; output from debian-4.0_r3-sparc w/ gcc 4.1.2 00000000 <leaf_call>: 0: 9d e3 bf 98 save %sp, -104, %sp 4: f0 27 a0 44 st %i0, [ %fp + 0x44 ] 8: f2 27 a0 48 st %i1, [ %fp + 0x48 ] c: f4 27 a0 4c st %i2, [ %fp + 0x4c ] 10: f6 27 a0 50 st %i3, [ %fp + 0x50 ] 14: f8 27 a0 54 st %i4, [ %fp + 0x54 ] 18: fa 27 a0 58 st %i5, [ %fp + 0x58 ] 1c: 81 e8 00 00 restore 20: 81 c3 e0 08 retl 24: 01 00 00 00 nop 00000028 <nonleaf_call>: 28: 9d e3 bf 78 save %sp, -136, %sp ; prolog 2c: e0 07 a0 40 ld [ %fp + 0x40 ], %l0 ; pointer to struct to return -> l0 30: f0 27 a0 44 st %i0, [ %fp + 0x44 ] ; | 34: f2 27 a0 48 st %i1, [ %fp + 0x48 ] ; | 38: f4 27 a0 4c st %i2, [ %fp + 0x4c ] ; | 3c: f6 27 a0 50 st %i3, [ %fp + 0x50 ] ; | write input to prev frame's spill area 40: f8 27 a0 54 st %i4, [ %fp + 0x54 ] ; | 44: fa 27 a0 58 st %i5, [ %fp + 0x58 ] ; / 48: c2 07 a0 48 ld [ %fp + 0x48 ], %g1 ; \ 4c: c2 27 bf ec st %g1, [ %fp + -20 ] ; | 50: c2 07 a0 50 ld [ %fp + 0x50 ], %g1 ; | in arg 1,3,5 (the ints to be returned in struct), ... 54: c2 27 bf f0 st %g1, [ %fp + -16 ] ; | ... copied to temp space in local area for later use 58: c2 07 a0 58 ld [ %fp + 0x58 ], %g1 ; | 5c: c2 27 bf f4 st %g1, [ %fp + -12 ] ; | 60: 9c 03 bf 20 add %sp, -224, %sp ; alloca(220) - with 4b padding (multiple of 8), and ... 64: 82 03 a0 64 add %sp, 0x64, %g1 ; ... at least 100b at top of stack, via ... 68: c2 27 bf e4 st %g1, [ %fp + -28 ] ; ... local space (pointlessly) ... 6c: c4 07 bf e4 ld [ %fp + -28 ], %g2 ; ... to g2 70: 82 00 a0 07 add %g2, 7, %g1 ; | 74: 83 30 60 03 srl %g1, 3, %g1 ; | 8b alignment of alloca()'d space pointed to by g1 78: 83 28 60 03 sll %g1, 3, %g1 ; | 7c: c2 27 bf e4 st %g1, [ %fp + -28 ] ; free g1 again by copy via temp space, ... 80: c4 07 bf e4 ld [ %fp + -28 ], %g2 ; ... to g2 84: 82 10 20 4c mov 0x4c, %g1 ; 'L' -> g1, and ... 88: c2 28 80 00 stb %g1, [ %g2 ] ; ... store in aligned alloca()'d space 8c: c2 07 a0 60 ld [ %fp + 0x60 ], %g1 ; arg 6 (fetched from prev frame's stack param area), and ... 90: c2 23 a0 5c st %g1, [ %sp + 0x5c ] ; ... "pushed" onto stack 94: d0 07 a0 48 ld [ %fp + 0x48 ], %o0 ; | 98: d2 07 a0 4c ld [ %fp + 0x4c ], %o1 ; | 9c: d4 07 a0 50 ld [ %fp + 0x50 ], %o2 ; | arg 0,1,2,3,4 (fetched from prev frame's spill area) a0: d6 07 a0 54 ld [ %fp + 0x54 ], %o3 ; | a4: d8 07 a0 58 ld [ %fp + 0x58 ], %o4 ; | a8: da 07 a0 5c ld [ %fp + 0x5c ], %o5 ; arg 5 (fetched from prev frame's stack param area) ac: 40 00 00 00 call ac <nonleaf_call+0x84> ; call leaf_call (objdump not from final link but .o) b0: 01 00 00 00 nop ; branch delay slot b4: c2 07 bf ec ld [ %fp + -20 ], %g1 ; | b8: c2 24 00 00 st %g1, [ %l0 ] ; | bc: c2 07 bf f0 ld [ %fp + -16 ], %g1 ; | c0: c2 24 20 04 st %g1, [ %l0 + 4 ] ; | store struct elements c4: c2 07 bf f4 ld [ %fp + -12 ], %g1 ; | c8: c2 24 20 08 st %g1, [ %l0 + 8 ] ; | cc: b0 10 00 10 mov %l0, %i0 ; return value (pointer to struct) d0: 81 e8 00 00 restore ; | d4: 81 c3 e0 0c jmp %o7 + 0xc ; | epilog d8: 01 00 00 00 nop ; | branch delay slot 000000dc <main>: dc: 9d e3 bf 80 save %sp, -128, %sp ; prolog e0: 03 00 00 00 sethi %hi(0), %g1 ; | e4: 82 10 60 00 mov %g1, %g1 ! 0 <leaf_call> ; | prep arg 2, load from static data into f8 (addr = 0 b/c objdumped .o, not final linked) e8: d1 00 40 00 ld [ %g1 ], %f8 ; / ec: 03 00 00 00 sethi %hi(0), %g1 ; \ f0: 82 10 60 00 mov %g1, %g1 ! 0 <leaf_call> ; | prep arg 4, load from static data into f9 (addr = 0 b/c objdumped .o, not final linked) f4: d3 00 40 00 ld [ %g1 ], %f9 ; | f8: 82 10 20 06 mov 6, %g1 ; arg 6, ... fc: c2 23 a0 5c st %g1, [ %sp + 0x5c ] ; ... "pushed" onto stack 100: 82 10 20 07 mov 7, %g1 ; arg 7, ... 104: c2 23 a0 60 st %g1, [ %sp + 0x60 ] ; ... "pushed" onto stack 108: 82 07 bf ec add %fp, -20, %g1 ; store pointer to some frame local data between ... 10c: c2 23 a0 40 st %g1, [ %sp + 0x40 ] ; ... spill and i*/l* save area to be used for struct return value 110: 90 10 20 00 clr %o0 ; arg 0 114: 92 10 20 01 mov 1, %o1 ; arg 1 118: d1 27 bf f8 st %f8, [ %fp + -8 ] ; | arg 2, from f8 via temp space ... 11c: d4 07 bf f8 ld [ %fp + -8 ], %o2 ; | ... to o2 120: 96 10 20 03 mov 3, %o3 ; arg 3 124: d3 27 bf f8 st %f9, [ %fp + -8 ] ; | arg 4, from f9 via temp space ... 128: d8 07 bf f8 ld [ %fp + -8 ], %o4 ; | ... to o4 12c: 9a 10 20 05 mov 5, %o5 ; arg 5 130: 40 00 00 00 call 130 <main+0x54> ; call nonleaf_call (objdump not from final link but .o) 134: 01 00 00 00 nop ; branch delay slot 138: 00 00 00 0c unimp 0xc ; sparc convention for returned aggregates: use unimp with field (here 0xc) specifiying size of returned struct (see sparc manual explanation) 13c: 82 10 20 00 clr %g1 ; | 140: b0 10 00 01 mov %g1, %i0 ; / return value 144: 81 e8 00 00 restore ; \ 148: 81 c3 e0 08 retl ; | epilog 14c: 01 00 00 00 nop ; | branch delay slot ; vim: ft=asm