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view doc/disas_examples/sparc64.sparc64.disas @ 357:d982a00c2177
- PPC64 asm syntax fix, specifying explicitly comparison mode for cmpi (newer toolchains complain, older ones took optional field of instruction which happened to be same value)
| author | Tassilo Philipp |
|---|---|
| date | Tue, 25 Feb 2020 18:16:13 +0100 |
| parents | 74c056b597b7 |
| children | c9e19249ecd3 |
line wrap: on
line source
; #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-9.0-sparc64 w/ gcc 6.1.1 0000000000000000 <leaf_call>: 0: 9d e3 bf 50 save %sp, -176, %sp 4: 8a 10 00 19 mov %i1, %g5 8: 88 10 00 1a mov %i2, %g4 c: 86 10 00 1b mov %i3, %g3 10: 84 10 00 1c mov %i4, %g2 14: 82 10 00 1d mov %i5, %g1 18: f0 27 a8 7f st %i0, [ %fp + 0x87f ] 1c: ca 27 a8 87 st %g5, [ %fp + 0x887 ] 20: c8 27 a8 8f st %g4, [ %fp + 0x88f ] 24: c6 27 a8 97 st %g3, [ %fp + 0x897 ] 28: c4 27 a8 9f st %g2, [ %fp + 0x89f ] 2c: c2 27 a8 a7 st %g1, [ %fp + 0x8a7 ] 30: 01 00 00 00 nop 34: 81 cf e0 08 rett %i7 + 8 38: 01 00 00 00 nop 000000000000003c <nonleaf_call>: 3c: 9d e3 bf 40 save %sp, -192, %sp ; prolog 40: 8a 10 00 19 mov %i1, %g5 ; | 44: 88 10 00 1a mov %i2, %g4 ; | 48: 86 10 00 1b mov %i3, %g3 ; | 4c: 84 10 00 1c mov %i4, %g2 ; | 50: 82 10 00 1d mov %i5, %g1 ; | 54: f0 27 a8 7f st %i0, [ %fp + 0x87f ] ; | write input to prev frame's spill area (e.g. offset = 128 for i0, jumping over i*/l* save area) 58: ca 27 a8 87 st %g5, [ %fp + 0x887 ] ; | (pointlessly using an extra reg copy to g* for most) 5c: c8 27 a8 8f st %g4, [ %fp + 0x88f ] ; | 60: c6 27 a8 97 st %g3, [ %fp + 0x897 ] ; | 64: c4 27 a8 9f st %g2, [ %fp + 0x89f ] ; | 68: c2 27 a8 a7 st %g1, [ %fp + 0x8a7 ] ; | 6c: 9c 03 bf 10 add %sp, -240, %sp ; alloca(220) - with padding, and ... 70: 82 03 a8 bf add %sp, 0x8bf, %g1 ; ... at least 192b at top of stack 74: 82 00 60 0f add %g1, 0xf, %g1 ; | 78: 83 30 70 04 srlx %g1, 4, %g1 ; | 7c: 83 28 70 04 sllx %g1, 4, %g1 ; | 16b alignment of alloca()'d space pointed to by g2 80: 84 10 00 01 mov %g1, %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 a8 b3 ld [ %fp + 0x8b3 ], %g1 ; arg 5 (fetched from prev frame's stack param area), ... 90: b9 38 60 00 sra %g1, 0, %i4 ; ... -> i4 94: c2 07 a8 a7 ld [ %fp + 0x8a7 ], %g1 ; arg 4 (fetched from prev frame's spill area), ... 98: bb 38 60 00 sra %g1, 0, %i5 ; ... -> i5 9c: c2 07 a8 9f ld [ %fp + 0x89f ], %g1 ; arg 3 (fetched from prev frame's spill area), ... a0: 8b 38 60 00 sra %g1, 0, %g5 ; ... -> g5 a4: c2 07 a8 97 ld [ %fp + 0x897 ], %g1 ; arg 2 (fetched from prev frame's spill area), ... a8: 89 38 60 00 sra %g1, 0, %g4 ; ... -> g4 ac: c2 07 a8 8f ld [ %fp + 0x88f ], %g1 ; arg 1 (fetched from prev frame's spill area), ... b0: 87 38 60 00 sra %g1, 0, %g3 ; ... -> g3 b4: c2 07 a8 87 ld [ %fp + 0x887 ], %g1 ; arg 0 (fetched from prev frame's spill area), ... b8: 85 38 60 00 sra %g1, 0, %g2 ; ... -> g2 bc: c2 07 a8 bb ld [ %fp + 0x8bb ], %g1 ; arg 6 (fetched from prev frame's stack param area), ... c0: 83 38 60 00 sra %g1, 0, %g1 ; ... -> g1, and ... c4: c2 73 a8 af stx %g1, [ %sp + 0x8af ] ; ... "pushed" onto stack c8: 9a 10 00 1c mov %i4, %o5 ; | cc: 98 10 00 1d mov %i5, %o4 ; | d0: 96 10 00 05 mov %g5, %o3 ; | d4: 94 10 00 04 mov %g4, %o2 ; | arg 0,1,2,3,4 (fetched from prev frame's spill area) d8: 92 10 00 03 mov %g3, %o1 ; | dc: 90 10 00 02 mov %g2, %o0 ; | e0: 40 00 00 00 call e0 <nonleaf_call+0xa4> ; call leaf_call (objdump not from final link but .o) e4: 01 00 00 00 nop ; branch delay slot e8: 01 00 00 00 nop ; ec: 81 cf e0 08 rett %i7 + 8 ; | epilog f0: 01 00 00 00 nop ; | branch delay slot 00000000000000f4 <main>: f4: 9d e3 bf 40 save %sp, -192, %sp ; prolog f8: 82 10 20 07 mov 7, %g1 ; arg 7, ... fc: c2 73 a8 b7 stx %g1, [ %sp + 0x8b7 ] ; ... "pushed" onto stack 100: 82 10 20 06 mov 6, %g1 ; arg 6, ... 104: c2 73 a8 af stx %g1, [ %sp + 0x8af ] ; ... "pushed" onto stack 108: 9a 10 20 05 mov 5, %o5 ; arg 5 10c: 98 10 20 04 mov 4, %o4 ; arg 4 110: 96 10 20 03 mov 3, %o3 ; arg 3 114: 94 10 20 02 mov 2, %o2 ; arg 2 118: 92 10 20 01 mov 1, %o1 ; arg 1 11c: 90 10 20 00 clr %o0 ; arg 0 120: 40 00 00 00 call 120 <main+0x2c> ; call nonleaf_call (objdump not from final link but .o) 124: 01 00 00 00 nop ; branch delay slot 128: 82 10 20 00 clr %g1 ! 0 <leaf_call> ; | 12c: 83 38 60 00 sra %g1, 0, %g1 ; | return value 130: b0 10 00 01 mov %g1, %i0 ; / 134: 81 cf e0 08 rett %i7 + 8 ; \ epilog 138: 01 00 00 00 nop ; | branch delay slot ; output from freebsd-11.0-sparc64 w/ gcc 4.2.1 0000000000000000 <leaf_call>: 0: 9d e3 bf 40 save %sp, -192, %sp 4: 82 10 00 18 mov %i0, %g1 8: 84 10 00 19 mov %i1, %g2 c: 86 10 00 1a mov %i2, %g3 10: 88 10 00 1b mov %i3, %g4 14: 8a 10 00 1c mov %i4, %g5 18: c2 27 a8 7f st %g1, [ %fp + 0x87f ] 1c: c4 27 a8 87 st %g2, [ %fp + 0x887 ] 20: c6 27 a8 8f st %g3, [ %fp + 0x88f ] 24: c8 27 a8 97 st %g4, [ %fp + 0x897 ] 28: ca 27 a8 9f st %g5, [ %fp + 0x89f ] 2c: fa 27 a8 a7 st %i5, [ %fp + 0x8a7 ] 30: 81 cf e0 08 rett %i7 + 8 34: 01 00 00 00 nop 38: 01 00 00 00 nop 3c: 01 00 00 00 nop 0000000000000040 <nonleaf_call>: 40: 9d e3 bf 20 save %sp, -224, %sp 44: 82 10 00 18 mov %i0, %g1 48: 84 10 00 19 mov %i1, %g2 4c: 86 10 00 1a mov %i2, %g3 50: 88 10 00 1b mov %i3, %g4 54: 8a 10 00 1c mov %i4, %g5 58: 9a 10 00 1d mov %i5, %o5 5c: c2 27 a8 7f st %g1, [ %fp + 0x87f ] 60: c4 27 a8 87 st %g2, [ %fp + 0x887 ] 64: c6 27 a8 8f st %g3, [ %fp + 0x88f ] 68: c8 27 a8 97 st %g4, [ %fp + 0x897 ] 6c: ca 27 a8 9f st %g5, [ %fp + 0x89f ] 70: da 27 a8 a7 st %o5, [ %fp + 0x8a7 ] 74: 9c 03 bf 20 add %sp, -224, %sp 78: 82 03 a8 bf add %sp, 0x8bf, %g1 7c: c2 77 a7 e7 stx %g1, [ %fp + 0x7e7 ] 80: c4 5f a7 e7 ldx [ %fp + 0x7e7 ], %g2 84: 82 00 a0 0f add %g2, 0xf, %g1 88: 83 30 70 04 srlx %g1, 4, %g1 8c: 83 28 70 04 sllx %g1, 4, %g1 90: c2 77 a7 e7 stx %g1, [ %fp + 0x7e7 ] 94: c4 5f a7 e7 ldx [ %fp + 0x7e7 ], %g2 98: 82 10 20 4c mov 0x4c, %g1 9c: c2 28 80 00 stb %g1, [ %g2 ] a0: c2 07 a8 87 ld [ %fp + 0x887 ], %g1 a4: 89 38 60 00 sra %g1, 0, %g4 a8: c2 07 a8 8f ld [ %fp + 0x88f ], %g1 ac: 8b 38 60 00 sra %g1, 0, %g5 b0: c2 07 a8 97 ld [ %fp + 0x897 ], %g1 b4: 9b 38 60 00 sra %g1, 0, %o5 b8: c2 07 a8 9f ld [ %fp + 0x89f ], %g1 bc: 99 38 60 00 sra %g1, 0, %o4 c0: c2 07 a8 a7 ld [ %fp + 0x8a7 ], %g1 c4: 85 38 60 00 sra %g1, 0, %g2 c8: c2 07 a8 b3 ld [ %fp + 0x8b3 ], %g1 cc: 87 38 60 00 sra %g1, 0, %g3 d0: c2 07 a8 bb ld [ %fp + 0x8bb ], %g1 d4: 83 38 60 00 sra %g1, 0, %g1 d8: c2 73 a8 af stx %g1, [ %sp + 0x8af ] dc: 90 10 00 04 mov %g4, %o0 e0: 92 10 00 05 mov %g5, %o1 e4: 94 10 00 0d mov %o5, %o2 e8: 96 10 00 0c mov %o4, %o3 ec: 98 10 00 02 mov %g2, %o4 f0: 9a 10 00 03 mov %g3, %o5 f4: 40 00 00 00 call f4 <nonleaf_call+0xb4> f8: 01 00 00 00 nop fc: 81 cf e0 08 rett %i7 + 8 100: 01 00 00 00 nop 104: 30 68 00 07 b,a %xcc, 120 <main> 108: 01 00 00 00 nop 10c: 01 00 00 00 nop 110: 01 00 00 00 nop 114: 01 00 00 00 nop 118: 01 00 00 00 nop 11c: 01 00 00 00 nop 0000000000000120 <main>: 120: 9d e3 bf 30 save %sp, -208, %sp 124: 82 10 20 06 mov 6, %g1 128: c2 73 a8 af stx %g1, [ %sp + 0x8af ] 12c: 82 10 20 07 mov 7, %g1 130: c2 73 a8 b7 stx %g1, [ %sp + 0x8b7 ] 134: 90 10 20 00 clr %o0 138: 92 10 20 01 mov 1, %o1 13c: 94 10 20 02 mov 2, %o2 140: 96 10 20 03 mov 3, %o3 144: 98 10 20 04 mov 4, %o4 148: 9a 10 20 05 mov 5, %o5 14c: 40 00 00 00 call 14c <main+0x2c> 150: 01 00 00 00 nop 154: 82 10 20 00 clr %g1 ! 0 <leaf_call> 158: 83 38 60 00 sra %g1, 0, %g1 15c: b0 10 00 01 mov %g1, %i0 160: 81 cf e0 08 rett %i7 + 8 164: 01 00 00 00 nop 168: 30 68 00 06 b,a %xcc, 180 <main+0x60> 16c: 01 00 00 00 nop 170: 01 00 00 00 nop 174: 01 00 00 00 nop 178: 01 00 00 00 nop 17c: 01 00 00 00 nop ; output from netbsd-7.1-sparc64 w/ gcc 4.8.5 0000000000000000 <leaf_call>: 0: 9d e3 bf 50 save %sp, -176, %sp 4: 8a 10 00 19 mov %i1, %g5 8: 88 10 00 1a mov %i2, %g4 c: 86 10 00 1b mov %i3, %g3 10: 84 10 00 1c mov %i4, %g2 14: 82 10 00 1d mov %i5, %g1 18: f0 27 a8 7f st %i0, [ %fp + 0x87f ] 1c: ca 27 a8 87 st %g5, [ %fp + 0x887 ] 20: c8 27 a8 8f st %g4, [ %fp + 0x88f ] 24: c6 27 a8 97 st %g3, [ %fp + 0x897 ] 28: c4 27 a8 9f st %g2, [ %fp + 0x89f ] 2c: c2 27 a8 a7 st %g1, [ %fp + 0x8a7 ] 30: 81 cf e0 08 rett %i7 + 8 34: 01 00 00 00 nop 0000000000000038 <nonleaf_call>: 38: 9d e3 bf 40 save %sp, -192, %sp 3c: 8a 10 00 19 mov %i1, %g5 40: 88 10 00 1a mov %i2, %g4 44: 86 10 00 1b mov %i3, %g3 48: 84 10 00 1c mov %i4, %g2 4c: 82 10 00 1d mov %i5, %g1 50: f0 27 a8 7f st %i0, [ %fp + 0x87f ] 54: ca 27 a8 87 st %g5, [ %fp + 0x887 ] 58: c8 27 a8 8f st %g4, [ %fp + 0x88f ] 5c: c6 27 a8 97 st %g3, [ %fp + 0x897 ] 60: c4 27 a8 9f st %g2, [ %fp + 0x89f ] 64: c2 27 a8 a7 st %g1, [ %fp + 0x8a7 ] 68: 9c 03 bf 10 add %sp, -240, %sp 6c: 82 03 a8 bf add %sp, 0x8bf, %g1 70: 82 00 60 0f add %g1, 0xf, %g1 74: 83 30 70 04 srlx %g1, 4, %g1 78: 83 28 70 04 sllx %g1, 4, %g1 7c: 84 10 20 4c mov 0x4c, %g2 80: c4 28 40 00 stb %g2, [ %g1 ] 84: c2 07 a8 87 ld [ %fp + 0x887 ], %g1 88: bb 38 60 00 sra %g1, 0, %i5 8c: c2 07 a8 8f ld [ %fp + 0x88f ], %g1 90: 8b 38 60 00 sra %g1, 0, %g5 94: c2 07 a8 97 ld [ %fp + 0x897 ], %g1 98: 89 38 60 00 sra %g1, 0, %g4 9c: c2 07 a8 9f ld [ %fp + 0x89f ], %g1 a0: 87 38 60 00 sra %g1, 0, %g3 a4: c2 07 a8 a7 ld [ %fp + 0x8a7 ], %g1 a8: 85 38 60 00 sra %g1, 0, %g2 ac: c2 07 a8 b3 ld [ %fp + 0x8b3 ], %g1 b0: 83 38 60 00 sra %g1, 0, %g1 b4: f8 07 a8 bb ld [ %fp + 0x8bb ], %i4 b8: b9 3f 20 00 sra %i4, 0, %i4 bc: f8 73 a8 af stx %i4, [ %sp + 0x8af ] c0: 90 10 00 1d mov %i5, %o0 c4: 92 10 00 05 mov %g5, %o1 c8: 94 10 00 04 mov %g4, %o2 cc: 96 10 00 03 mov %g3, %o3 d0: 98 10 00 02 mov %g2, %o4 d4: 9a 10 00 01 mov %g1, %o5 d8: 40 00 00 00 call d8 <nonleaf_call+0xa0> dc: 01 00 00 00 nop e0: 81 cf e0 08 rett %i7 + 8 e4: 01 00 00 00 nop 00000000000000e8 <main>: e8: 9d e3 bf 40 save %sp, -192, %sp ec: 82 10 20 06 mov 6, %g1 f0: c2 73 a8 af stx %g1, [ %sp + 0x8af ] f4: 82 10 20 07 mov 7, %g1 f8: c2 73 a8 b7 stx %g1, [ %sp + 0x8b7 ] fc: 90 10 20 00 clr %o0 100: 92 10 20 01 mov 1, %o1 104: 94 10 20 02 mov 2, %o2 108: 96 10 20 03 mov 3, %o3 10c: 98 10 20 04 mov 4, %o4 110: 9a 10 20 05 mov 5, %o5 114: 40 00 00 00 call 114 <main+0x2c> 118: 01 00 00 00 nop 11c: 82 10 20 00 clr %g1 ! 0 <leaf_call> 120: 83 38 60 00 sra %g1, 0, %g1 124: b0 10 00 01 mov %g1, %i0 128: 81 cf e0 08 rett %i7 + 8 12c: 01 00 00 00 nop ; output from openbsd-7.1-sparc64 w/ gcc 4.2.1 0000000000000000 <leaf_call>: 0: 9d e3 bf 30 save %sp, -208, %sp 4: 82 10 00 18 mov %i0, %g1 8: 84 10 00 19 mov %i1, %g2 c: 86 10 00 1a mov %i2, %g3 10: 88 10 00 1b mov %i3, %g4 14: 8a 10 00 1c mov %i4, %g5 18: c2 27 a8 7f st %g1, [ %fp + 0x87f ] 1c: c4 27 a8 87 st %g2, [ %fp + 0x887 ] 20: c6 27 a8 8f st %g3, [ %fp + 0x88f ] 24: c8 27 a8 97 st %g4, [ %fp + 0x897 ] 28: ca 27 a8 9f st %g5, [ %fp + 0x89f ] 2c: fa 27 a8 a7 st %i5, [ %fp + 0x8a7 ] 30: 81 cf e0 08 rett %i7 + 8 34: 01 00 00 00 nop 38: ae 03 c0 17 add %o7, %l7, %l7 3c: 81 c3 e0 08 retl 40: 01 00 00 00 nop 0000000000000044 <nonleaf_call>: 44: 9d e3 bf 10 save %sp, -240, %sp 48: 2f 00 00 00 sethi %hi(0), %l7 4c: ae 05 e0 00 add %l7, 0, %l7 ! 0 <leaf_call> 50: 7f ff ff fa call 38 <leaf_call+0x38> 54: 01 00 00 00 nop 58: 82 10 00 18 mov %i0, %g1 5c: 84 10 00 19 mov %i1, %g2 60: 86 10 00 1a mov %i2, %g3 64: 88 10 00 1b mov %i3, %g4 68: 8a 10 00 1c mov %i4, %g5 6c: 9a 10 00 1d mov %i5, %o5 70: c2 27 a8 7f st %g1, [ %fp + 0x87f ] 74: c4 27 a8 87 st %g2, [ %fp + 0x887 ] 78: c6 27 a8 8f st %g3, [ %fp + 0x88f ] 7c: c8 27 a8 97 st %g4, [ %fp + 0x897 ] 80: ca 27 a8 9f st %g5, [ %fp + 0x89f ] 84: da 27 a8 a7 st %o5, [ %fp + 0x8a7 ] 88: 03 00 00 00 sethi %hi(0), %g1 8c: 82 10 60 00 mov %g1, %g1 ! 0 <leaf_call> 90: c2 5d c0 01 ldx [ %l7 + %g1 ], %g1 94: c4 58 40 00 ldx [ %g1 ], %g2 98: c4 77 a7 e7 stx %g2, [ %fp + 0x7e7 ] 9c: 84 10 20 00 clr %g2 a0: 9c 03 bf 20 add %sp, -224, %sp a4: 86 03 a8 bf add %sp, 0x8bf, %g3 a8: c6 77 a7 d7 stx %g3, [ %fp + 0x7d7 ] ac: c4 5f a7 d7 ldx [ %fp + 0x7d7 ], %g2 b0: 82 00 a0 0f add %g2, 0xf, %g1 b4: 83 30 70 04 srlx %g1, 4, %g1 b8: 83 28 70 04 sllx %g1, 4, %g1 bc: c2 77 a7 d7 stx %g1, [ %fp + 0x7d7 ] c0: c4 5f a7 d7 ldx [ %fp + 0x7d7 ], %g2 c4: 82 10 20 4c mov 0x4c, %g1 c8: c2 28 80 00 stb %g1, [ %g2 ] cc: c2 07 a8 87 ld [ %fp + 0x887 ], %g1 d0: 89 38 60 00 sra %g1, 0, %g4 d4: c2 07 a8 8f ld [ %fp + 0x88f ], %g1 d8: 8b 38 60 00 sra %g1, 0, %g5 dc: c2 07 a8 97 ld [ %fp + 0x897 ], %g1 e0: 9b 38 60 00 sra %g1, 0, %o5 e4: c2 07 a8 9f ld [ %fp + 0x89f ], %g1 e8: 99 38 60 00 sra %g1, 0, %o4 ec: c2 07 a8 a7 ld [ %fp + 0x8a7 ], %g1 f0: 85 38 60 00 sra %g1, 0, %g2 f4: c2 07 a8 b3 ld [ %fp + 0x8b3 ], %g1 f8: 87 38 60 00 sra %g1, 0, %g3 fc: c2 07 a8 bb ld [ %fp + 0x8bb ], %g1 100: 83 38 60 00 sra %g1, 0, %g1 104: c2 73 a8 af stx %g1, [ %sp + 0x8af ] 108: 90 10 00 04 mov %g4, %o0 10c: 92 10 00 05 mov %g5, %o1 110: 94 10 00 0d mov %o5, %o2 114: 96 10 00 0c mov %o4, %o3 118: 98 10 00 02 mov %g2, %o4 11c: 9a 10 00 03 mov %g3, %o5 120: 40 00 00 00 call 120 <nonleaf_call+0xdc> 124: 01 00 00 00 nop 128: 03 00 00 00 sethi %hi(0), %g1 12c: 82 10 60 00 mov %g1, %g1 ! 0 <leaf_call> 130: c2 5d c0 01 ldx [ %l7 + %g1 ], %g1 134: c6 5f a7 e7 ldx [ %fp + 0x7e7 ], %g3 138: c4 58 40 00 ldx [ %g1 ], %g2 13c: 86 18 c0 02 xor %g3, %g2, %g3 140: 84 10 20 00 clr %g2 144: 82 10 00 03 mov %g3, %g1 148: 02 c8 40 08 brz %g1, 168 <nonleaf_call+0x124> 14c: 01 00 00 00 nop 150: 03 00 00 00 sethi %hi(0), %g1 154: 82 10 60 00 mov %g1, %g1 ! 0 <leaf_call> 158: c2 5d c0 01 ldx [ %l7 + %g1 ], %g1 15c: 90 10 00 01 mov %g1, %o0 160: 40 00 00 00 call 160 <nonleaf_call+0x11c> 164: 01 00 00 00 nop 168: 81 cf e0 08 rett %i7 + 8 16c: 01 00 00 00 nop 0000000000000170 <main>: 170: 9d e3 bf 20 save %sp, -224, %sp 174: 82 10 20 06 mov 6, %g1 178: c2 73 a8 af stx %g1, [ %sp + 0x8af ] 17c: 82 10 20 07 mov 7, %g1 180: c2 73 a8 b7 stx %g1, [ %sp + 0x8b7 ] 184: 90 10 20 00 clr %o0 188: 92 10 20 01 mov 1, %o1 18c: 94 10 20 02 mov 2, %o2 190: 96 10 20 03 mov 3, %o3 194: 98 10 20 04 mov 4, %o4 198: 9a 10 20 05 mov 5, %o5 19c: 40 00 00 00 call 19c <main+0x2c> 1a0: 01 00 00 00 nop 1a4: 82 10 20 00 clr %g1 ! 0 <leaf_call> 1a8: 83 38 60 00 sra %g1, 0, %g1 1ac: b0 10 00 01 mov %g1, %i0 1b0: 81 cf e0 08 rett %i7 + 8 1b4: 01 00 00 00 nop ; --------------------- with float params, aggregate return value (<32b, passed in regs) and ellipsis with float -------------------> ; #include <stdlib.h> ; #include <stdarg.h> ; ; void leaf_call(int b, float c, int d, float e, int f, int g, float 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, ...) ; { ; va_list v; ; int g; ; float h; ; struct aggr st = { b, d, f }; ; va_start(v, f); ; g = va_arg(v, int); ; h = va_arg(v, float); ; /* 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.f); ; return 0; ; } ; output from netbsd-7.1-sparc64 w/ gcc 4.8.5 0000000000000000 <leaf_call>: 0: 9d e3 bf 50 save %sp, -176, %sp ; prolog 4: 88 10 00 18 mov %i0, %g4 ; | 8: c7 27 a8 87 st %f3, [ %fp + 0x887 ] ; | c: 86 10 00 1a mov %i2, %g3 ; | 10: cf 27 a8 97 st %f7, [ %fp + 0x897 ] ; | 14: 84 10 00 1c mov %i4, %g2 ; | write input to prev frame's spill area (e.g. offset = 128 for i0, jumping over i*/l* save area) 18: 82 10 00 1d mov %i5, %g1 ; | (pointlessly using an extra reg copy to g* for most) 1c: db 27 a8 af st %f13, [ %fp + 0x8af ] ; | note: float args are spilled as are all others 20: c8 27 a8 7f st %g4, [ %fp + 0x87f ] ; | 24: c6 27 a8 8f st %g3, [ %fp + 0x88f ] ; | 28: c4 27 a8 9f st %g2, [ %fp + 0x89f ] ; | 2c: c2 27 a8 a7 st %g1, [ %fp + 0x8a7 ] ; / 30: 81 cf e0 08 rett %i7 + 8 ; \ trap epilog 34: 01 00 00 00 nop ; | branch delay slot 0000000000000038 <nonleaf_call>: 38: 9d e3 bf 20 save %sp, -224, %sp ; prolog 3c: 88 10 00 18 mov %i0, %g4 ; | 40: 86 10 00 19 mov %i1, %g3 ; | 44: cb 27 a8 8f st %f5, [ %fp + 0x88f ] ; | 48: 84 10 00 1b mov %i3, %g2 ; | 4c: d3 27 a8 9f st %f9, [ %fp + 0x89f ] ; | write input to prev frame's spill area (e.g. offset = 128 for i0, jumping over i*/l* save area) 50: 82 10 00 1d mov %i5, %g1 ; | (pointlessly using an extra reg copy to g* for most) 54: c8 27 a8 7f st %g4, [ %fp + 0x87f ] ; | note: float args are spilled as are all others 58: c6 27 a8 87 st %g3, [ %fp + 0x887 ] ; | 5c: c4 27 a8 97 st %g2, [ %fp + 0x897 ] ; | 60: c2 27 a8 a7 st %g1, [ %fp + 0x8a7 ] ; | 64: c2 07 a8 87 ld [ %fp + 0x887 ], %g1 ; in arg 1 (int b, fetched from prev frame's spill area), ... 68: c2 27 a7 db st %g1, [ %fp + 0x7db ] ; ... copied to local space (0x7db - bias = -36) 6c: c2 07 a8 97 ld [ %fp + 0x897 ], %g1 ; in arg 3 (int d, fetched from prev frame's spill area), ... 70: c2 27 a7 df st %g1, [ %fp + 0x7df ] ; ... copied to local space (0x7df - bias = -32) 74: c2 07 a8 a7 ld [ %fp + 0x8a7 ], %g1 ; in arg 5 (int f, fetched from prev frame's spill area), ... 78: c2 27 a7 e3 st %g1, [ %fp + 0x7e3 ] ; ... copied to local space (0x7e3 - bias = -28) 7c: 82 07 a8 af add %fp, 0x8af, %g1 ; va_list: pointer to arg 5 -> g1 ... 80: c2 77 a7 e7 stx %g1, [ %fp + 0x7e7 ] ; ... store to local space (0x7e7 - bias = -24) 84: c2 5f a7 e7 ldx [ %fp + 0x7e7 ], %g1 ; reread to start iteration (pointlessly) 88: 84 00 60 04 add %g1, 4, %g2 ; point read ptr in g2 to first unnamed param (int) 8c: c4 00 80 00 ld [ %g2 ], %g2 ; in arg 6 (fetched from prev frame's stack param area), ... 90: c4 27 a7 fb st %g2, [ %fp + 0x7fb ] ; ... copied to local space (0x7fb - bias = -4) helper var (probably int g) 94: 82 00 60 08 add %g1, 8, %g1 ; point read ptr in g1 to second unnamed param (float, promoted to double), ... 98: c2 77 a7 e7 stx %g1, [ %fp + 0x7e7 ] ; ... store in local space (0x7fb - bias = -24) 9c: 91 d0 20 05 ta 5 ; trap - not sure what else is involved (objdump was made from .o, not finally linked exec) - maybe just b/c objdump skipped this for the output? 00000000000000a0 <main>: a0: 9d e3 bf 30 save %sp, -208, %sp ; prolog a4: 03 00 00 00 sethi %hi(0), %g1 ; | a8: 82 10 60 00 mov %g1, %g1 ! 0 <leaf_call> ; | ac: 83 28 70 0c sllx %g1, 0xc, %g1 ; | prep arg 2, load from static data into f11 (addr = 0 b/c objdumped .o, not final linked) b0: 82 10 60 00 mov %g1, %g1 ; | b4: d7 00 40 00 ld [ %g1 ], %f11 ; / b8: 03 00 00 00 sethi %hi(0), %g1 ; \ bc: 82 10 60 00 mov %g1, %g1 ! 0 <leaf_call> ; | prep arg 4, load from static data into f10 (addr = 0 b/c objdumped .o, not final linked) c0: 83 28 70 0c sllx %g1, 0xc, %g1 ; | c4: 82 10 60 00 mov %g1, %g1 ; | c8: d5 00 40 00 ld [ %g1 ], %f10 ; | cc: 82 10 20 06 mov 6, %g1 ; arg 6, ... d0: c2 73 a8 af stx %g1, [ %sp + 0x8af ] ; ... "pushed" onto stack d4: 03 00 00 00 sethi %hi(0), %g1 ; | d8: 82 10 60 00 mov %g1, %g1 ! 0 <leaf_call> ; | dc: 83 28 70 0c sllx %g1, 0xc, %g1 ; | prep arg 7, load from static data as double (b/c of vararg promotion) into d8 (addr = 0 b/c objdumped .o, not final linked) e0: 82 10 60 00 mov %g1, %g1 ; | e4: d1 18 40 00 ldd [ %g1 ], %f8 ; | e8: d1 3b a8 b7 std %f8, [ %sp + 0x8b7 ] ; arg 7 "pushed" onto stack as double ec: 90 10 20 00 clr %o0 ; arg 0 (note, this is not the pointer to the aggregate return value, b/c latter <= 32b) f0: 92 10 20 01 mov 1, %o1 ; arg 1 f4: 8b a0 00 2b fmovs %f11, %f5 ; arg 2 f8: 96 10 20 03 mov 3, %o3 ; arg 3 fc: 93 a0 00 2a fmovs %f10, %f9 ; arg 4 100: 9a 10 20 05 mov 5, %o5 ; arg 5 104: 40 00 00 00 call 104 <main+0x64> ; call nonleaf_call (objdump not from final link but .o) 108: 01 00 00 00 nop ; branch delay slot 10c: 84 10 00 08 mov %o0, %g2 ; | 110: 82 10 00 09 mov %o1, %g1 ; / get return value (12b aggregate) out of 2 regs (16b) 114: 87 30 b0 20 srlx %g2, 0x20, %g3 ; \ 118: c8 07 a7 f3 ld [ %fp + 0x7f3 ], %g4 ; | 11c: 88 09 20 00 and %g4, 0, %g4 ; | store 1st struct field (int) by g2 >> 32 (and some other operations unnecessary here) 120: 86 11 00 03 or %g4, %g3, %g3 ; | 124: c6 27 a7 f3 st %g3, [ %fp + 0x7f3 ] ; / 128: 86 10 3f ff mov -1, %g3 ; \ 12c: 87 30 f0 20 srlx %g3, 0x20, %g3 ; | 130: 84 08 80 03 and %g2, %g3, %g2 ; | 134: c6 07 a7 f7 ld [ %fp + 0x7f7 ], %g3 ; | store 2nd struct field (int) by (-1 >> 32) & g2 (and then some other operations unnecessary here) 138: 86 08 e0 00 and %g3, 0, %g3 ; | 13c: 84 10 c0 02 or %g3, %g2, %g2 ; | 140: c4 27 a7 f7 st %g2, [ %fp + 0x7f7 ] ; / 144: 83 38 70 20 srax %g1, 0x20, %g1 ; \ 148: c4 07 a7 fb ld [ %fp + 0x7fb ], %g2 ; | 14c: 84 08 a0 00 and %g2, 0, %g2 ; | store 3rd struct field (int) by g1 >> 32 (and then some other operations unnecessary here) 150: 82 10 80 01 or %g2, %g1, %g1 ; | 154: c2 27 a7 fb st %g1, [ %fp + 0x7fb ] ; / 158: 82 10 20 00 clr %g1 ; \ 15c: 83 38 60 00 sra %g1, 0, %g1 ; / return value 160: b0 10 00 01 mov %g1, %i0 ; \ 164: 81 cf e0 08 rett %i7 + 8 ; | epilog 168: 01 00 00 00 nop ; | branch delay slot ; vim: ft=asm