//: jump to 32-bit offset
//:: jump
:(before "End Initialize Op Names")
put_new(Name, "e9", "jump disp32 bytes away (jmp)");
:(code)
void test_jump_disp32() {
run(
"== code 0x1\n"
// op ModR/M SIB displacement immediate
" e9 05 00 00 00 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: e9\n"
"run: jump 5\n"
"run: 0x0000000b opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: 0x00000006 opcode: 05");
}
:(before "End Single-Byte Opcodes")
case 0xe9: { // jump disp32
const int32_t offset = next32();
trace(Callstack_depth+1, "run") << "jump " << offset << end();
EIP += offset;
break;
}
//:: jump if equal/zero
:(before "End Initialize Op Names")
put_new(Name_0f, "84", "jump disp32 bytes away if equal, if ZF is set (jcc/jz/je)");
:(code)
void test_je_disp32_success() {
ZF = true;
run(
"== code 0x1\n"
// op ModR/M SIB displacement immediate
" 0f 84 05 00 00 00 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 0f\n"
"run: jump 5\n"
"run: 0x0000000c opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: 0x00000007 opcode: 05");
}
:(before "End Two-Byte Opcodes Starting With 0f")
case 0x84: { // jump disp32 if ZF
const int32_t offset = next32();
if (ZF) {
trace(Callstack_depth+1, "run") << "jump " << offset << end();
EIP += offset;
}
break;
}
:(code)
void test_je_disp32_fail() {
ZF = false;
run(
"== code 0x1\n"
// op ModR/M SIB displacement immediate
" 0f 84 05 00 00 00 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 0f\n"
"run: 0x00000007 opcode: 05\n"
"run: 0x0000000c opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: jump 5");
}
//:: jump if not equal/not zero
:(before "End Initialize Op Names")
put_new(Name_0f, "85", "jump disp32 bytes away if not equal, if ZF is not set (jcc/jnz/jne)");
:(code)
void test_jne_disp32_success() {
ZF = false;
run(
"== code 0x1\n"
// op ModR/M SIB displacement immediate
" 0f 85 05 00 00 00 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 0f\n"
"run: jump 5\n"
"run: 0x0000000c opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: 0x00000007 opcode: 05");
}
:(before "End Two-Byte Opcodes Starting With 0f")
case 0x85: { // jump disp32 unless ZF
const int32_t offset = next32();
if (!ZF) {
trace(Callstack_depth+1, "run") << "jump " << offset << end();
EIP += offset;
}
break;
}
:(code)
void test_jne_disp32_fail() {
ZF = true;
run(
"== code 0x1\n"
// op ModR/M SIB displacement immediate
" 0f 85 05 00 00 00 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 0f\n"
"run: 0x00000007 opcode: 05\n"
"run: 0x0000000c opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: jump 5");
}
//:: jump if greater
:(before "End Initialize Op Names")
put_new(Name_0f, "8f", "jump disp32 bytes away if greater (signed), if ZF is unset and SF == OF (jcc/jg/jnle)");
put_new(Name_0f, "87", "jump disp32 bytes away if greater (unsigned), if ZF is unset and CF is unset (jcc/ja/jnbe)");
:(code)
void test_jg_disp32_success() {
ZF = false;
SF = false;
OF = false;
run(
"== code 0x1\n"
// op ModR/M SIB displacement immediate
" 0f 8f 05 00 00 00 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 0f\n"
"run: jump 5\n"
"run: 0x0000000c opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: 0x00000007 opcode: 05");
}
:(before "End Two-Byte Opcodes Starting With 0f")
case 0x8f: { // jump disp32 if !SF and !ZF
const int32_t offset = next32();
if (!ZF && SF == OF) {
trace(Callstack_depth+1, "run") << "jump " << offset << end();
EIP += offset;
}
break;
}
case 0x87: { // jump disp32 if !CF and !ZF
const int32_t offset = next();
if (!CF && !ZF) {
trace(Callstack_depth+1, "run") << "jump " << offset << end();
EIP += offset;
}
break;
}
:(code)
void test_jg_disp32_fail() {
ZF = false;
SF = true;
OF = false;
run(
"== code 0x1\n"
// op ModR/M SIB displacement immediate
" 0f 8f 05 00 00 00 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 0f\n"
"run: 0x00000007 opcode: 05\n"
"run: 0x0000000c opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: jump 5");
}
//:: jump if greater or equal
:(before "End Initialize Op Names")
put_new(Name_0f, "8d", "jump disp32 bytes away if greater or equal (signed), if SF == OF (jcc/jge/jnl)");
put_new(Name_0f, "83", "jump disp32 bytes away if greater or equal (unsigned), if CF is unset (jcc/jae/jnb)");
:(code)
void test_jge_disp32_success() {
SF = false;
OF = false;
run(
"== code 0x1\n"
// op ModR/M SIB displacement immediate
" 0f 8d 05 00 00 00 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 0f\n"
"run: jump 5\n"
"run: 0x0000000c opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: 0x00000007 opcode: 05");
}
:(before "End Two-Byte Opcodes Starting With 0f")
case 0x8d: { // jump disp32 if !SF
const int32_t offset = next32();
if (SF == OF) {
trace(Callstack_depth+1, "run") << "jump " << offset << end();
EIP += offset;
}
break;
}
case 0x83: { // jump disp32 if !CF
const int32_t offset = next32();
if (!CF) {
trace(Callstack_depth+1, "run") << "jump " << offset << end();
EIP += offset;
}
break;
}
:(code)
void test_jge_disp32_fail() {
SF = true;
OF = false;
run(
"== code 0x1\n"
// op ModR/M SIB displacement immediate
" 0f 8d 05 00 00 00 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 0f\n"
"run: 0x00000007 opcode: 05\n"
"run: 0x0000000c opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: jump 5");
}
//:: jump if lesser
:(before "End Initialize Op Names")
put_new(Name_0f, "8c", "jump disp32 bytes away if lesser (signed), if SF != OF (jcc/jl/jnge)");
put_new(Name_0f, "82", "jump disp32 bytes away if lesser (unsigned), if CF is set (jcc/jb/jnae)");
:(code)
void test_jl_disp32_success() {
ZF = false;
SF = true;
OF = false;
run(
"== code 0x1\n"
// op ModR/M SIB displacement immediate
" 0f 8c 05 00 00 00 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 0f\n"
"run: jump 5\n"
"run: 0x0000000c opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: 0x00000007 opcode: 05");
}
:(before "End Two-Byte Opcodes Starting With 0f")
case 0x8c: { // jump disp32 if SF and !ZF
const int32_t offset = next32();
if (SF != OF) {
trace(Callstack_depth+1, "run") << "jump " << offset << end();
EIP += offset;
}
break;
}
case 0x72: { // jump disp32 if CF
const int32_t offset = next32();
if (CF) {
trace(Callstack_depth+1, "run") << "jump " << offset << end();
EIP += offset;
}
break;
}
:(code)
void test_jl_disp32_fail() {
ZF = false;
SF = false;
OF = false;
run(
"== code 0x1\n"
// op ModR/M SIB displacement immediate
" 0f 8c 05 00 00 00 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 0f\n"
"run: 0x00000007 opcode: 05\n"
"run: 0x0000000c opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: jump 5");
}
//:: jump if lesser or equal
:(before "End Initialize Op Names")
put_new(Name_0f, "8e", "jump disp32 bytes away if lesser or equal (signed), if ZF is set or SF != OF (jcc/jle/jng)");
put_new(Name_0f, "86", "jump disp8 bytes away if lesser or equal (unsigned), if ZF is set or CF is set (jcc/jbe/jna)");
:(code)
void test_jle_disp32_equal() {
ZF = true;
SF = false;
OF = false;
run(
"== code 0x1\n"
// op ModR/M SIB displacement immediate
" 0f 8e 05 00 00 00 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 0f\n"
"run: jump 5\n"
"run: 0x0000000c opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: 0x00000007 opcode: 05");
}
:(code)
void test_jle_disp32_lesser() {
ZF = false;
SF = true;
OF = false;
run(
"== code 0x1\n"
// op ModR/M SIB displacement immediate
" 0f 8e 05 00 00 00 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 0f\n"
"run: jump 5\n"
"run: 0x0000000c opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: 0x00000007 opcode: 05");
}
:(before "End Two-Byte Opcodes Starting With 0f")
case 0x8e: { // jump disp32 if SF or ZF
const int32_t offset = next32();
if (ZF || SF != OF) {
trace(Callstack_depth+1, "run") << "jump " << offset << end();
EIP += offset;
}
break;
}
case 0x86: { // jump disp32 if ZF or CF
const int32_t offset = next32();
if (ZF || CF) {
trace(Callstack_depth+1, "run") << "jump " << offset << end();
EIP += offset;
}
break;
}
:(code)
void test_jle_disp32_greater() {
ZF = false;
SF = false;
OF = false;
run(
"== code 0x1\n"
// op ModR/M SIB displacement immediate
" 0f 8e 05 00 00 00 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_C/*
* (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
* See LICENSE file for license details.
*
* dynamic window manager is designed like any other X client as well. It is
* driven through handling X events. In contrast to other X clients, a window
* manager selects for SubstructureRedirectMask on the root window, to receive
* events about window (dis-)appearance. Only one X connection at a time is
* allowed to select for this event mask.
*
* Calls to fetch an X event from the event queue are blocking. Due reading
* status text from standard input, a select()-driven main loop has been
* implemented which selects for reads on the X connection and STDIN_FILENO to
* handle all data smoothly. The event handlers of dwm are organized in an
* array which is accessed whenever a new event has been fetched. This allows
* event dispatching in O(1) time.
*
* Each child of the root window is called a client, except windows which have
* set the override_redirect flag. Clients are organized in a global
* doubly-linked client list, the focus history is remembered through a global
* stack list. Each client contains an array of Bools of the same size as the
* global tags array to indicate the tags of a client. For each client dwm
* creates a small title window, which is resized whenever the (_NET_)WM_NAME
* properties are updated or the client is moved/resized.
*
* Keys and tagging rules are organized as arrays and defined in the config.h
* file. These arrays are kept static in event.o and tag.o respectively,
* because no other part of dwm needs access to them. The current mode is
* represented by the arrange() function pointer, which wether points to
* dofloat() or dotile().
*
* To understand everything else, start reading main.c:main().
*/
#include "config.h"
#include <X11/Xlib.h>
/* mask shorthands, used in event.c and client.c */
#define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
#define MOUSEMASK (BUTTONMASK | PointerMotionMask)
/* other stuff used in different places */
#define BORDERPX 1
#define PROTODELWIN 1
enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
enum { WMProtocols, WMDelete, WMLast }; /* default atoms */
enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
enum { ColFG, ColBG, ColLast }; /* color */
typedef enum {
StackLeft, StackBottom, StackRight
} StackPos; /* stack position*/
typedef enum {
TopLeft, TopRight, BotLeft, BotRight
} Corner; /* window corners */
typedef union {
const char *cmd;
int i;
} Arg; /* argument type */
typedef struct {
int ascent;
int descent;
int height;
XFontSet set;
XFontStruct *xfont;
} Fnt;
typedef struct {
int x, y, w, h;
unsigned long norm[ColLast];
unsigned long sel[ColLast];
unsigned long status[ColLast];
Drawable drawable;
Fnt font;
GC gc;
} DC; /* draw context */
typedef struct Client Client;
struct Client {
char name[256];
int proto;
int x, y, w, h;
int rx, ry, rw, rh; /* revert geometry */
int tx, ty, tw, th; /* title window geometry */
int basew, baseh, incw, inch, maxw, maxh, minw, minh;
int grav;
long flags;
unsigned int border, weight;
Bool isfloat, ismax;
Bool *tags;
Client *next;
Client *prev;
Client *snext;
Window win;
Window twin;
};
extern const char *tags[]; /* all tags */
extern char stext[1024]; /* status text */
extern int bx, by, bw, bh, bmw; /* bar geometry, bar mode label width */
extern int screen, sx, sy, sw, sh; /* screen geometry */
extern unsigned int master, ntags, numlockmask; /* master percent, number of tags, dynamic lock mask */
extern void (*handler[LASTEvent])(XEvent *); /* event handler */
extern void (*arrange)(Arg *); /* arrange function, indicates mode */
extern Atom wmatom[WMLast], netatom[NetLast];
extern Bool running, issel, *seltag; /* seltag is array of Bool */
extern Client *clients, *sel, *stack; /* global client list and stack */
extern Cursor cursor[CurLast];
extern DC dc; /* global draw context */
extern Display *dpy;
extern StackPos stackpos;
extern Window root, barwin;
/* client.c */
extern void ban(Client *c); /* ban c from screen */
extern void configure(Client *c); /* send synthetic configure event */
extern void focus(Client *c); /* focus c, c may be NULL */
extern Client *getclient(Window w); /* return client of w */
extern Client *getctitle(Window w); /* return client of title window */
extern void gravitate(Client *c, Bool invert); /* gravitate c */
extern void killclient(Arg *arg); /* kill c nicely */
extern void manage(Window w, XWindowAttributes *wa); /* manage new client */
extern void resize(Client *c, Bool sizehints, Corner sticky); /* resize c*/
extern void resizetitle(Client *c); /* resizes c->twin correctly */
extern void updatesize(Client *c); /* update the size structs of c */
extern void updatetitle(Client *c); /* update the name of c */
extern void unmanage(Client *c); /* destroy c */
/* draw.c */
extern void drawall(void); /* draw all visible client titles and the bar */
extern void drawstatus(void); /* draw the bar */
extern void drawtitle(Client *c); /* draw title of c */
extern unsigned long getcolor(const char *colstr); /* return color of colstr */
extern void setfont(const char *fontstr); /* set the font for DC */
extern unsigned int textw(const char *text); /* return the width of text in px*/
/* event.c */
extern void grabkeys(void); /* grab all keys defined in config.h */
extern void procevent(void); /* process pending X events */
/* main.c */
extern int getproto(Window w); /* return protocol mask of WMProtocols property of w */
extern void quit(Arg *arg); /* quit dwm nicely */
extern void sendevent(Window w, Atom a, long value); /* send synthetic event to w */
extern int xerror(Display *dsply, XErrorEvent *ee); /* dwm's X error handler */
/* tag.c */
extern void initrregs(void); /* initialize regexps of rules defined in config.h */
extern Client *getnext(Client *c); /* returns next visible client */
extern Client *getprev(Client *c); /* returns previous visible client */
extern void settags(Client *c, Client *trans); /* sets tags of c */
extern void tag(Arg *arg); /* tags c with arg's index */
extern void toggletag(Arg *arg); /* toggles c tags with arg's index */
/* util.c */
extern void *emallocz(unsigned int size); /* allocates zero-initialized memory, exits on error */
extern void eprint(const char *errstr, ...); /* prints errstr and exits with 1 */
extern void *erealloc(void *ptr, unsigned int size); /* reallocates memory, exits on error */
extern void spawn(Arg *arg); /* forks a new subprocess with to arg's cmd */
/* view.c */
extern void detach(Client *c); /* detaches c from global client list */
extern void dofloat(Arg *arg); /* arranges all windows floating, arg is ignored */
extern void dotile(Arg *arg); /* arranges all windows, arg is ignored */
extern void focusnext(Arg *arg); /* focuses next visible client, arg is ignored */
extern void focusprev(Arg *arg); /* focuses previous visible client, arg is ignored */
extern Bool isvisible(Client *c); /* returns True if client is visible */
extern void resizecol(Arg *arg); /* resizes the master percent with arg's index value */
extern void restack(void); /* restores z layers of all clients */
extern void togglestackpos(Arg *arg); /* toggles stack position */
extern void togglemode(Arg *arg); /* toggles global arrange function (dotile/dofloat) */
extern void toggleview(Arg *arg); /* toggles the tag with arg's index (in)visible */
extern void view(Arg *arg); /* views the tag with arg's index */
extern void viewall(Arg *arg); /* views all tags, arg is ignored */
extern void zoom(Arg *arg); /* zooms the focused client to master area, arg is ignored */