What makes you think that 0x00000000004004 is memory address oc c That address looks more like memory address of assembly code and 0x85f445c7 represents the hexa representation of machine code. Output formats (debugging with gdb)by default, gdb prints a value according to its data type Sometimes this is not what you want For example, you might want to print a number in hex, or a pointer in decimal Or you might want to view data in memory at a certain address as a character string or as an instruction
To do these things, specify an output format when you print a value. This page explains the x command The x command displays the memory contents at a given address using the specified format. Print memory address in gdb at terry vargas blog gdb print memory address as string gdb prints memory addresses showing the location of stack traces, structure values, pointer values, breakpoints, and so forth, even when it also Or you might want to view data in memory at a certain address as a Very useful if you need to print.
(gdb) set {int}0x08040000 = 42 (gdb) set {int}0x08040000 = 0xffffffff but how can i write chars or entire strings in a similarly simple fashion to memory Right now i have to resort to translating the string to hex and then entering that, which is time. The format string follows the same rules as the printf in the c standard library R — begin execution of a program that has been loaded under control of gdb. The default for addr is usually just after the last address examined—but several other commands also set the default address Info breakpoints (to the address of the last breakpoint listed), info line (to the starting address of a line), and print (if you use it to display a value from memory).
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