What does this assembly l code mean? -

-

in program source code ,i saw following. code exactly?

.code foo proc    nop    nop     push rax    push rax    mov rax, 545h     mov [rsp+8], rax    pop rax     ret foo endp end

then used dll export:

extern "c" void __stdcall foo(void);

it pushes 2 values, modifies 1 of them, pops one. leaves 1 value ret.

it unclear how better jmp 545h though.


Comments

Post a Comment

Popular posts from this blog

Upgrade php version of xampp not success -

-
today decided upgrade xampp new php version (5.6.11). have downloaded , configured based on google said. after resetting server, runs successfully. when check xampp's phpinfo, has not been updated. screenshot what have missed? back htdocs files , database. download xampp . uninstall xampp control panel. manually remove xampp folder partition. install back problem solved
Read more

c - Bitwise operation with (signed) enum value -

-
i using enumerator values flags: typedef enum { = 0x00, b = 0x01u, // u has no influence, expected c = 0x02u, // u has no influence, expected ... } enum_name; volatile unsigned char* reg = someaddress; *reg |= b; according misra-c:2004 bitwise operations shall not done signed type. unfortunately, compiler iar use signed int (or short or char) underlying type of enums, , option can find relates size, not signedness ("--enum-is-int"). according iar c/c++ development guide arm , pages 169 , 211, can define type of enum s if enable iar language extensions ( -e command-line option, or project > options > c/c++ compiler > language > allow iar extensions in ide). in particular, should define "sentinel" value, make sure compiler chooses correct type. prefers signed types, , uses smallest possible integer type, sentinel should largest positive integer corresponding unsigned integer type can describe. example, typedef enum ...
Read more

xslt - Unnest parent nodes by child node -

-
in xml there items 0-n attributes , item should copied each attribute new item 1 attribute. given xml this: <?xml version="1.0" encoding="utf-8" ?> <items> <item> <name>a</name> <attributes> <attribute> <key>attribute1</key> <value>1</value> </attribute> </attributes> </item> <item> <name>b</name> </item> <item> <name>c</name> <attributes> <attribute> <key>attribute1</key> <value>5</value> </attribute> <attribute> <key>attribute2</key> <value>2</value> </attribute> <attribute> <key>attri...
Read more