ranger - mirror of ranger - a simple, vim-like file manager

	Commit message (Expand)	Author	Age	Files	Lines
*	help.index: added additional information	hut	2010-12-22	1	-0/+1
*	help: added missing dots	hut	2010-12-22	2	-2/+2
*	help.movement: Added documentation for scope.sh	hut	2010-12-22	1	-0/+22
*	updated doc/colorschemes.txt	hut	2010-12-22	1	-15/+6
*	core.actions: Fixed colors in help	hut	2010-12-22	1	-1/+1
*	widgets.browserview: Cleaner solution for commit 3fd5f5caf6	hut	2010-12-22	2	-2/+8
*	Merge branch 'stable'	hut	2010-12-22	1	-8/+23
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\| *	HOW DO I TURN OFF CAPS LOCK? v1.2.3	hut	2010-12-13	4	-3/+10
\| *	updated README	hut	2010-12-13	1	-3/+6
\| *	ext.signals: fixed memory leak	hut	2010-11-22	2	-6/+22
\| *	ext.signal_dispatcher: optimization of signal_emit	hut	2010-11-22	1	-6/+6
\| *	fsobject: The lazy lookup of .image attribute was too lazy	hut	2010-11-22	1	-0/+4
\| *	widgets.statusbar: Fixed crash after deleting current file	hut	2010-11-22	1	-1/+4
\| *	widgets.statusbar: Reload permissions of current file on change	hut	2010-11-22	1	-2/+3
\| *	fsobject.fsobject: Use ctime, not mtime, for identifying changes	hut	2010-11-22	2	-9/+10
\| *	fsobject.directory: Fixed sorting by type	hut	2010-11-22	1	-1/+1
\| *	ext.keybinding_parser: fixed python3 incompatibility	hut	2010-11-22	1	-1/+1
\| *	ext.keybinding_parser: allow mapping alt+special keys	hut	2010-11-22	1	-4/+12
\| *	Tea, Earl Grey, Hot. v1.2.2	hut	2010-10-10	4	-11/+19
\| *	defaults.keys: show bookmarks when typing "um"	hut	2010-10-10	1	-1/+2
\| *	defaults.commands: Fixed :cd command without argument	hut	2010-10-10	1	-3/+2
\| *	gui.color: fixed ranger.gui.color.remove_attr	hut	2010-10-10	1	-1/+1
\| *	api.commands, api.keys: added dummies that allow pydoc to be generated	hut	2010-10-10	2	-0/+13
\| *	colorschemes.jungle: updated jungle colorscheme	hut	2010-10-10	1	-1/+1
\| *	colorschemes.snow: updated snow colorscheme	hut	2010-10-10	1	-1/+4
\| *	gui.ui: Disable mouse when console is open	hut	2010-10-10	1	-2/+2
\| *	Prevent garbage-collecting used directories	hut	2010-10-10	1	-1/+1
\| *	Cosmetic changes	hut	2010-10-10	2	-2/+1
\| *	core.actions: Minor bug in move_parent()	hut	2010-10-10	1	-0/+2
\| *	defaults.apps: open empty files with unknown mimetype in vim	hut	2010-10-10	1	-1/+1
\| *	ranger.__main__: typo	hut	2010-10-10	1	-1/+0
* \|	gui.bar: Fixed malpositioning of tab in some cases	hut	2010-12-22	1	-1/+1
* \|	core.actions: Don't attempt do show directory in pager (key i)	hut	2010-12-21	1	-1/+5
* \|	widgets.pager: Fixed horizontal scrolling	hut	2010-12-21	1	-0/+2
* \|	core.environment: make Actions.reset refresh current directory	hut	2010-12-21	1	-1/+2
* \|	widget.browserview: fixed padding_right option	hut	2010-12-21	2	-0/+6
* \|	Commited missing line of last commit	hut	2010-12-21	1	-1/+0
* \|	widgets.console: Fixed position of cursor with unicode chars (py3)	hut	2010-12-21	2	-2/+8
* \|	core.actions: Fixed get_preview()	hut	2010-12-18	2	-2/+3
* \|	defaults.commands: Added search_inc(remental)	hut	2010-12-13	3	-9/+14
* \|	defaults.commands: let open_with use selection, not just 1 file	hut	2010-12-11	1	-1/+1
* \|	fsobject.fsobject: Update previews when file changes	hut	2010-12-11	1	-0/+1
* \|	updated README	hut	2010-12-10	1	-3/+6
* \|	ext.human_readable: added doctest	hut	2010-11-22	1	-3/+7
* \|	core.actions: simplified tag functions	hut	2010-11-22	1	-24/+18
* \|	ext.signals: fixed memory leak	hut	2010-11-22	2	-6/+22
* \|	fsobject: The lazy lookup of .image attribute was too lazy	hut	2010-11-20	1	-0/+4
* \|	widgets.statusbar: Fixed crash after deleting current file	hut	2010-11-17	1	-1/+4
* \|	core.actions: added update_preview()	hut	2010-11-17	1	-0/+7
* \|	widgets.console: Fixed input of unicode chars on py3	hut	2010-11-13	2	-20/+54

<!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 - 035compute_segment_address.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/035compute_segment_address.cc'>https://github.com/akkartik/mu/blob/master/035compute_segment_address.cc</a> <pre id='vimCodeElement'> 1 //: ELF binaries have finicky rules about the precise alignment each segment 2 //: should start at. They depend on the amount of code in a program. 3 //: We shouldn't expect people to adjust segment addresses everytime they make 4 //: a change to their programs. 5 //: Let's start taking the given segment addresses as guidelines, and adjust 6 //: them as necessary. 7 //: This gives up a measure of control in placing code and data. 8 9 void <a href='035compute_segment_address.cc.html#L9'>test_segment_name</a>() { 10 <a href='011run.cc.html#L82'>run</a>( 11 "== code 0x09000000\n" 12 "05/add-to-EAX 0x0d0c0b0a/imm32\n" 13 // code starts at 0x09000000 + p_offset, which is 0x54 for a single-segment binary 14 ); 15 <a href='003trace.cc.html#L292'>CHECK_TRACE_CONTENTS</a>( 16 "load: 0x09000054 -> 05\n" 17 "load: 0x09000055 -> 0a\n" 18 "load: 0x09000056 -> 0b\n" 19 "load: 0x09000057 -> 0c\n" 20 "load: 0x09000058 -> 0d\n" 21 "run: add imm32 0x0d0c0b0a to EAX\n" 22 "run: storing 0x0d0c0b0a\n" 23 ); 24 } 25 26 //: compute segment address 27 28 :(before "End Transforms") 29 <a href='031transforms.cc.html#L4'>Transform</a>.push_back(<a href='035compute_segment_address.cc.html#L32'>compute_segment_starts</a>); 30 31 :(code) 32 void <a href='035compute_segment_address.cc.html#L32'>compute_segment_starts</a>(program& p) { 33 <a href='003trace.cc.html#L96'>trace</a>(3, "transform") << "-- compute segment addresses" << end(); 34 uint32_t p_offset = /*size of ehdr*/0x34 + <a href='001help.cc.html#L170'>SIZE</a>(p.<a href='011run.cc.html#L106'>segments</a>)*0x20/*size of each phdr*/; 35 for (size_t i = 0; i < p.<a href='011run.cc.html#L106'>segments</a>.size(); ++i) { 36 segment& curr = p.<a href='011run.cc.html#L106'>segments</a>.at(i); 37 if (curr.start >= 0x08000000) { 38 // valid address for user space, so assume we're creating a real ELF binary, not just running a test 39 curr.start &= 0xfffff000; // same number of zeros as the p_align used when emitting the ELF binary 40 curr.start |= (p_offset & 0xfff); 41 <a href='003trace.cc.html#L96'>trace</a>(99, "transform") << "segment " <" begins at address 0x" << <a href='010---vm.cc.html#L395'>HEXWORD</a> << curr.start << end(); 42 } 43 p_offset += size_of(curr); 44 assert(p_offset < <a href='010---vm.cc.html#L89'>SEGMENT_ALIGNMENT</a>); // for now we get less and less available space in each successive segment 45 } 46 } 47 48 uint32_t size_of(const segment& s) { 49 uint32_t sum = 0; 50 for (int i = 0; i < <a href='001help.cc.html#L170'>SIZE</a>(s.<a href='011run.cc.html#L113'>lines</a>); ++i) 51 sum += <a href='035compute_segment_address.cc.html#L56'>num_bytes</a>(s.<a href='011run.cc.html#L113'>lines</a>.at(i)); 52 return sum; 53 } 54 55 // Assumes all bitfields are packed. 56 uint32_t <a href='035compute_segment_address.cc.html#L56'>num_bytes</a>(const line& inst) { 57 uint32_t sum = 0; 58 for (int i = 0; i < <a href='001help.cc.html#L170'>SIZE</a>(inst.<a href='011run.cc.html#L122'>words</a>); ++i) 59 sum += size_of(inst.<a href='011run.cc.html#L122'>words</a>.at(i)); 60 return sum; 61 } 62 63 int size_of(const word& w) { 64 if (has_operand_metadata(w, "disp32") || has_operand_metadata(w, "imm32")) 65 return 4; 66 else if (has_operand_metadata(w, "disp16")) 67 return 2; 68 // End size_of(word w) Special-cases 69 else 70 return 1; 71 } 72 73 //: Dependencies: 74 //: - We'd like to compute segment addresses before setting up global variables, 75 //: because computing addresses for global variables requires knowing where 76 //: the data segment starts. 77 //: - We'd like to finish expanding labels before computing segment addresses, 78 //: because it would make computing the sizes of segments more self-contained 79 //: (num_bytes). 80 //: 81 //: Decision: compute segment addresses before expanding labels, by being 82 //: aware in this layer of certain operand types that will eventually occupy 83 //: multiple bytes. 84 //: 85 //: The layer to expand labels later hooks into num_bytes() to teach this 86 //: layer that labels occupy zero space in the binary. </pre> </body> </html>