Mercurial > pub > dyncall > dyncall
diff doc/disas_examples/sparc64.sparc64.disas @ 499:fc614cb865c6
- doc and disasexample additions specific to non-trivial C++ aggregates as return values (incl. fixes to doc and additional LSB specific PPC32 section)
| author | Tassilo Philipp |
|---|---|
| date | Mon, 04 Apr 2022 15:50:52 +0200 |
| parents | cb19b2fe2422 |
| children |
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--- a/doc/disas_examples/sparc64.sparc64.disas Wed Mar 23 15:33:09 2022 +0100 +++ b/doc/disas_examples/sparc64.sparc64.disas Mon Apr 04 15:50:52 2022 +0200 @@ -1722,5 +1722,114 @@ +; ---------- C++ trivial and non-trivial aggrs as return values ----------> +; +; struct Trivial { int a; }; +; struct NonTrivial { int a; NonTrivial() : a(0) {} NonTrivial(const NonTrivial& rhs) : a(rhs.a) { } }; +; +; extern "C" { +; struct Trivial f1() { return Trivial(); } +; } +; +; struct NonTrivial f2() { return NonTrivial(); } +; +; extern "C" { +; void f() +; { +; int a=1; +; a += 123; +; struct Trivial t = f1(); +; a -= 123; +; struct NonTrivial n = f2(); +; a -= 12; +; } +; } + + + +; output from openbsd-6.0-sparc64 w/ gcc 4.2.1 + +0000000000000d60 <f1>: + d60: 9d e3 bf 30 save %sp, -208, %sp + d64: 82 10 20 00 clr %g1 + d68: 83 30 60 00 srl %g1, 0, %g1 + d6c: 83 28 70 20 sllx %g1, 0x20, %g1 + d70: b0 10 00 01 mov %g1, %i0 + d74: 81 cf e0 08 rett %i7 + 8 + d78: 01 00 00 00 nop + +0000000000000d7c <_Z2f2v>: + d7c: 9d e3 bf 30 save %sp, -208, %sp + d80: a0 10 00 18 mov %i0, %l0 + d84: 82 10 00 10 mov %l0, %g1 + d88: 90 10 00 01 mov %g1, %o0 + d8c: 40 14 01 1d call 501200 <_ZN10NonTrivialC1Ev@plt> + d90: 01 00 00 00 nop + d94: b0 10 00 10 mov %l0, %i0 + d98: 81 cf e0 08 rett %i7 + 8 + d9c: 01 00 00 00 nop + da0: ae 03 c0 17 add %o7, %l7, %l7 + da4: 81 c3 e0 08 retl + da8: 01 00 00 00 nop + +0000000000000dac <f>: + dac: 9d e3 bf 10 save %sp, -240, %sp ; + db0: 2f 00 0c 00 sethi %hi(0x300000), %l7 ; + db4: ae 05 e2 a0 add %l7, 0x2a0, %l7 ; + db8: 7f ff ff fa call da0 <_Z2f2v+0x24> ; + dbc: 01 00 00 00 nop ; + dc0: 03 00 00 00 sethi %hi(0), %g1 ; + dc4: 82 10 60 48 or %g1, 0x48, %g1 ; + dc8: c2 5d c0 01 ldx [ %l7 + %g1 ], %g1 ; + dcc: c4 58 40 00 ldx [ %g1 ], %g2 ; + dd0: c4 77 a7 e7 stx %g2, [ %fp + 0x7e7 ] ; + dd4: 84 10 20 00 clr %g2 ; + dd8: 82 10 20 01 mov 1, %g1 ; + ddc: c2 27 a7 e3 st %g1, [ %fp + 0x7e3 ] ; + de0: c2 07 a7 e3 ld [ %fp + 0x7e3 ], %g1 ; + de4: 82 00 60 7b add %g1, 0x7b, %g1 ; + de8: c2 27 a7 e3 st %g1, [ %fp + 0x7e3 ] ; + dec: 40 14 01 25 call 501280 <f1@plt> ; call f1() + df0: 01 00 00 00 nop ; + df4: 82 10 00 08 mov %o0, %g1 ; + df8: c0 27 a7 cb clr [ %fp + 0x7cb ] ; + dfc: 83 38 70 20 srax %g1, 0x20, %g1 ; + e00: c6 07 a7 cb ld [ %fp + 0x7cb ], %g3 ; + e04: 84 08 e0 00 and %g3, 0, %g2 ; + e08: 82 10 80 01 or %g2, %g1, %g1 ; + e0c: c2 27 a7 cb st %g1, [ %fp + 0x7cb ] ; + e10: c2 07 a7 cb ld [ %fp + 0x7cb ], %g1 ; + e14: c2 27 a7 df st %g1, [ %fp + 0x7df ] ; + e18: c2 07 a7 e3 ld [ %fp + 0x7e3 ], %g1 ; + e1c: 82 00 7f 85 add %g1, -123, %g1 ; + e20: c2 27 a7 e3 st %g1, [ %fp + 0x7e3 ] ; + e24: 82 07 a7 db add %fp, 0x7db, %g1 ; + e28: 90 10 00 01 mov %g1, %o0 ; hidden first arg (ptr to space to hold NonTrivial retval), via ptr as non-trivial + e2c: 40 14 00 e5 call 5011c0 <_Z2f2v@plt> ; call f2() + e30: 01 00 00 00 nop ; + e34: c2 07 a7 e3 ld [ %fp + 0x7e3 ], %g1 ; + e38: 82 00 7f f4 add %g1, -12, %g1 ; + e3c: c2 27 a7 e3 st %g1, [ %fp + 0x7e3 ] ; + e40: 03 00 00 00 sethi %hi(0), %g1 ; + e44: 82 10 60 48 or %g1, 0x48, %g1 ; + e48: c2 5d c0 01 ldx [ %l7 + %g1 ], %g1 ; + e4c: c4 5f a7 e7 ldx [ %fp + 0x7e7 ], %g2 ; + e50: c6 58 40 00 ldx [ %g1 ], %g3 ; + e54: 84 18 80 03 xor %g2, %g3, %g2 ; + e58: 86 10 20 00 clr %g3 ; + e5c: 82 10 00 02 mov %g2, %g1 ; + e60: 02 c8 40 08 brz %g1, e80 <f+0xd4> ; + e64: 01 00 00 00 nop ; + e68: 03 00 00 00 sethi %hi(0), %g1 ; + e6c: 82 10 60 40 or %g1, 0x40, %g1 ; + e70: c2 5d c0 01 ldx [ %l7 + %g1 ], %g1 ; + e74: 90 10 00 01 mov %g1, %o0 ; + e78: 40 14 00 ca call 5011a0 <__stack_smash_handler@plt> ; + e7c: 01 00 00 00 nop ; + e80: 81 cf e0 08 rett %i7 + 8 ; + e84: 01 00 00 00 nop ; + + + ; vim: ft=asm