execve.c File Reference

x86: where a new program starts, for execve(). More...

#include <core/system.h>
#include <core/arch.h>
#include <sys/proc.h>

Go to the source code of this file.

Functions
void	arch_exec_start (struct thread *thread, uintptr_t entry, uintptr_t sp)
	Sets up a thread to start a new program when it next returns to user mode: at its entry point, with its stack pointer at its initial stack, which the kernel has built already (argc, argv, envp and the auxiliary vector, as the System V ABI has them: sys/execve.c).

Detailed Description

x86: where a new program starts, for execve().

The kernel has built its initial stack already (sys/execve.c); the thread only needs its instruction and stack pointers set.

Definition in file execve.c.

Function Documentation

arch_exec_start()

void arch_exec_start	(	struct thread *	thread,
		uintptr_t	entry,
		uintptr_t	sp )

Sets up a thread to start a new program when it next returns to user mode: at its entry point, with its stack pointer at its initial stack, which the kernel has built already (argc, argv, envp and the auxiliary vector, as the System V ABI has them: sys/execve.c).

The other registers start as zeros, and so does the FPU's state.

Parameters

thread	the thread, which hasn't run since execve() (or ever)
entry	the program's entry point
sp	the initial stack pointer, 16-byte aligned

Definition at line 14 of file execve.c.

References thread::arch, arch_exec_start(), x86_thread::rflags, x86_thread::rip, x86_thread::rsp, and X86_EFLAGS.