mu - Soul of a tiny new machine. More thorough tests → More comprehensible and rewrite-friendly software → More resilient society.

	Commit message (Expand)	Author	Age	Files	Lines
*	.	Kartik Agaram	2020-10-24	1	-3/+3
*	bootstrap: more tweaks to int constants	Kartik Agaram	2020-10-23	1	-13/+13
*	7089	Kartik Agaram	2020-10-22	1	-18/+18
*	7041	Kartik Agaram	2020-10-15	1	-12/+12
*	6090 - new instruction: multiply by immediate	Kartik Agaram	2020-03-06	1	-0/+39
*	5983 - fix an emulator bounds-check bug	Kartik Agaram	2020-02-05	1	-1/+1
*	5818	Kartik Agaram	2019-12-22	1	-3/+3
*	5713	Kartik Agaram	2019-10-23	1	-2/+2
*	5485 - promote SubX to top-level	Kartik Agaram	2019-07-27	1	-0/+1272

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Mu - 019functions.cc</title> <meta name="Generator" content="Vim/8.1"> <meta name="plugin-version" content="vim8.1_v1"> <meta name="syntax" content="cpp"> <meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy="> <meta name="colorscheme" content="minimal-light"> <style type="text/css">  </style> <script type='text/javascript'>  </script> </head> <body onload='JumpToLine();'> <a href='https://github.com/akkartik/mu/blob/master/019functions.cc'>https://github.com/akkartik/mu/blob/master/019functions.cc</a> <pre id='vimCodeElement'> 1 //:: call 2 3 :(before "End Initialize Op Names") 4 <a href='001help.cc.html#L235'>put_new</a>(<a href='010vm.cc.html#L355'>Name</a>, "e8", "call <a href='040tests.cc.html#L82'>disp32</a> (call)"); 5 6 :(code) 7 void <a href='019functions.cc.html#L7'>test_call_disp32</a>() { 8 <a href='010vm.cc.html#L163'>Mem</a>.push_back(vma(0xbd000000)); // manually allocate memory 9 <a href='010vm.cc.html#L25'>Reg</a>[ESP].u = 0xbd000064; 10 <a href='011run.cc.html#L82'>run</a>( 11 "== code 0x1\n" 12 // op ModR/M SIB displacement immediate 13 " e8 a0 00 00 00 \n" // call function offset at 0x000000a0 14 // next EIP is 6 15 ); 16 <a href='003trace.cc.html#L290'>CHECK_TRACE_CONTENTS</a>( 17 "run: call imm32 0x000000a0\n" 18 "run: decrementing <a href='010vm.cc.html#L14'>ESP</a> to 0xbd000060\n" 19 "run: pushing value 0x00000006\n" 20 "run: jumping to 0x000000a6\n" 21 ); 22 } 23 24 :(before "End Single-Byte Opcodes") 25 case 0xe8: { // call disp32 relative to next EIP 26 const int32_t offset = <a href='011run.cc.html#L433'>next32</a>(); 27 ++Callstack_depth; 28 <a href='003trace.cc.html#L96'>trace</a>(Callstack_depth+1, "run") << "call imm32 0x" << <a href='010vm.cc.html#L408'>HEXWORD</a> << offset << end(); 29 //? cerr << "push: EIP: " << EIP << " => " << Reg[ESP].u << '\n'; 30 <a href='012elf.cc.html#L94'>push</a>(<a href='010vm.cc.html#L26'>EIP</a>); 31 <a href='010vm.cc.html#L26'>EIP</a> += offset; 32 <a href='003trace.cc.html#L96'>trace</a>(Callstack_depth+1, "run") << "jumping to 0x" << <a href='010vm.cc.html#L408'>HEXWORD</a> << <a href='010vm.cc.html#L26'>EIP</a> << end(); 33 break; 34 } 35 36 //: 37 38 :(code) 39 void <a href='019functions.cc.html#L39'>test_call_r32</a>() { 40 <a href='010vm.cc.html#L163'>Mem</a>.push_back(vma(0xbd000000)); // manually allocate memory 41 <a href='010vm.cc.html#L25'>Reg</a>[ESP].u = 0xbd000064; 42 <a href='010vm.cc.html#L25'>Reg</a>[EBX].u = 0x000000a0; 43 <a href='011run.cc.html#L82'>run</a>( 44 "== code 0x1\n" 45 // op ModR/M SIB displacement immediate 46 " ff d3 \n" // call function offset at EBX 47 // next EIP is 3 48 ); 49 <a href='003trace.cc.html#L290'>CHECK_TRACE_CONTENTS</a>( 50 "run: call to r/m32\n" 51 "run: r/m32 is EBX\n" 52 "run: decrementing <a href='010vm.cc.html#L14'>ESP</a> to 0xbd000060\n" 53 "run: pushing value 0x00000003\n" 54 "run: jumping to 0x000000a3\n" 55 ); 56 } 57 58 :(before "End Op ff Subops") 59 case 2: { // call function pointer at r/m32 60 <a href='003trace.cc.html#L96'>trace</a>(Callstack_depth+1, "run") << "call to r/m32" << end(); 61 const int32_t* offset = <a href='013direct_addressing.cc.html#L101'>effective_address</a>(modrm); 62 <a href='012elf.cc.html#L94'>push</a>(<a href='010vm.cc.html#L26'>EIP</a>); 63 <a href='010vm.cc.html#L26'>EIP</a> += *offset; 64 <a href='003trace.cc.html#L96'>trace</a>(Callstack_depth+1, "run") << "jumping to 0x" << <a href='010vm.cc.html#L408'>HEXWORD</a> << <a href='010vm.cc.html#L26'>EIP</a> << end(); 65 ++Callstack_depth; 66 break; 67 } 68 69 :(code) 70 void <a href='019functions.cc.html#L70'>test_call_mem_at_r32</a>() { 71 <a href='010vm.cc.html#L163'>Mem</a>.push_back(vma(0xbd000000)); // manually allocate memory 72 <a href='010vm.cc.html#L25'>Reg</a>[ESP].u = 0xbd000064; 73 <a href='010vm.cc.html#L25'>Reg</a>[EBX].u = 0x2000; 74 <a href='011run.cc.html#L82'>run</a>( 75 "== code 0x1\n" 76 // op ModR/M SIB displacement immediate 77 " ff 13 \n" // call function offset at *EBX 78 // next EIP is 3 79 "== data 0x2000\n" 80 "a0 00 00 00\n" // 0x000000a0 81 ); 82 <a href='003trace.cc.html#L290'>CHECK_TRACE_CONTENTS</a>( 83 "run: call to r/m32\n" 84 "run: effective address is 0x00002000 (<a href='010vm.cc.html#L13'>EBX</a>)\n" 85 "run: decrementing <a href='010vm.cc.html#L14'>ESP</a> to 0xbd000060\n" 86 "run: pushing value 0x00000003\n" 87 "run: jumping to 0x000000a3\n" 88 ); 89 } 90 91 //:: ret 92 93 :(before "End Initialize Op Names") 94 <a href='001help.cc.html#L235'>put_new</a>(<a href='010vm.cc.html#L355'>Name</a>, "c3", "return from most recent unfinished call (<a href='040tests.cc.html#L89'>ret</a>)"); 95 96 :(code) 97 void <a href='019functions.cc.html#L97'>test_ret</a>() { 98 <a href='010vm.cc.html#L163'>Mem</a>.push_back(vma(0xbd000000)); // manually allocate memory 99 <a href='010vm.cc.html#L25'>Reg</a>[ESP].u = 0xbd000064; 100 <a href='010vm.cc.html#L252'>write_mem_u32</a>(<a href='010vm.cc.html#L25'>Reg</a>[ESP].u, 0x10); 101 <a href='011run.cc.html#L82'>run</a>( 102 "== code 0x1\n" 103 // op ModR/M SIB displacement immediate 104 " c3 \n" // return 105 "== data 0x2000\n" 106 "10 00 00 00\n" // 0x00000010 107 ); 108 <a href='003trace.cc.html#L290'>CHECK_TRACE_CONTENTS</a>( 109 "run: return\n" 110 "run: popping value 0x00000010\n" 111 "run: jumping to 0x00000010\n" 112 ); 113 } 114 115 :(before "End Single-Byte Opcodes") 116 case 0xc3: { // return from a call 117 <a href='003trace.cc.html#L96'>trace</a>(Callstack_depth+1, "run") << "return" << end(); 118 --Callstack_depth; 119 <a href='010vm.cc.html#L26'>EIP</a> = <a href='013direct_addressing.cc.html#L1270'>pop</a>(); 120 <a href='003trace.cc.html#L96'>trace</a>(Callstack_depth+1, "run") << "jumping to 0x" << <a href='010vm.cc.html#L408'>HEXWORD</a> << <a href='010vm.cc.html#L26'>EIP</a> << end(); 121 break; 122 } </pre> </body> </html>