> For the complete documentation index, see [llms.txt](https://www.ctfrecipes.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.ctfrecipes.com/pwn/architectures/mips32/registers.md). # Registers Registers all begin with a dollar-symbol ($). The floating point registers are named $f0, $f1, ..., $f31. The general-purpose registers have both names and numbers, and are listed below. When programming in MIPS assembly, it is usually best to use the register names.
NumberNameComments
$0$zero, $r0Always zero
$1$atReserved for assembler
$2, $3$v0, $v1First and second return values, respectively
$4, ..., $7$a0, ..., $a3First four arguments to functions
$8, ..., $15$t0, ..., $t7Temporary registers
$16, ..., $23$s0, ..., $s7Saved registers
$24, $25$t8, $t9More temporary registers
$26, $27$k0, $k1Reserved for kernel (operating system)
$28$gpGlobal pointer
$29$spStack pointer
$30$fpFrame pointer
$31$raReturn address
In addition to the general purpose registers, the MIPS32 architecture also includes a number of special purpose registers, which are used to control the operation of the processor and to store certain types of data. These include the **program counter (PC) and** the **status register (SR).** ## Resources {% embed url="" %}