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programming:assembly:assembly_programming [2021/03/21 22:12]
nanodano
programming:assembly:assembly_programming [2021/03/22 02:22] (current)
nanodano ↷ Page name changed from programming:assembly:home to programming:assembly:assembly_programming
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 Use interrupt ''0x80'' to make Linux system calls like reading and writing to file descriptors and sockets. Use interrupt ''0x80'' to make Linux system calls like reading and writing to file descriptors and sockets.
-For a list of system calls in Linux, run ''man syscalls'' or refer to an online man page like [[https://man7.org/linux/man-pages/man2/syscalls.2.html]]. To get the actual number, try to find the ''unistd.h'' file. For example, in Debian, ''/usr/include/asm-generic/unistd.h'' has all of the statements that define the syscall numbers (''NR''). Or, refer to [[https://github.com/torvalds/linux/blob/v4.17/arch/x86/entry/syscalls/syscall_64.tbl]] and [[https://github.com/torvalds/linux/blob/v4.17/arch/x86/entry/syscalls/syscall_32.tbl]].+For a list of system calls in Linux, run ''man syscalls'' or refer to an online man page like [[https://man7.org/linux/man-pages/man2/syscalls.2.html]]. To get the actual number, try to find the ''unistd.h'' file. For example, in Debian, ''/usr/include/asm-generic/unistd.h'' has all of the statements that define the syscall numbers (''NR''). Or, refer to the source code of Linux (pick the right branch) [[https://github.com/torvalds/linux/blob/v4.17/arch/x86/entry/syscalls/syscall_64.tbl]] and [[https://github.com/torvalds/linux/blob/v4.17/arch/x86/entry/syscalls/syscall_32.tbl]].
  
 Here is an example of compiling with ''nasm'': Here is an example of compiling with ''nasm'':
programming/assembly/assembly_programming.1616364771.txt.gz · Last modified: 2021/03/21 22:12 by nanodano