syscall.sh / x86 / brk
brk
change data segment size
sys_brk(unsigned long brk)| number | 45 (0x2d) |
|---|---|
| abi | i386 |
| entry point | sys_brk |
| since | Linux 3.3 |
| man page | brk(2) |
| source | elixir.bootlin.com |
Registers
| register | value |
|---|---|
eax | 45, the syscall number |
ebx | unsigned long brk |
eax | the return value |
Then run int 0x80 to enter the kernel.
Same syscall on other architectures
- x64 12
- arm64 214
- arm 45
- riscv64 214
- x32 1073741836
- loongarch64 214
- ppc64 45
- ppc 45
- s390x 45
- mips64 5012
- mipsn32 6012
- mipso32 4045
- alpha 17
- arc 214
- csky 214
- hexagon 214
- m68k 45
- microblaze 45
- nios2 214
- openrisc 214
- parisc 45
- sh 45
- sparc 17
- sparc64 17
- xtensa 83
Get this as JSON: https://api.syscall.sh/v2/syscalls/x86/brk