61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
/* The kernel call implemented in this file:
|
|
* m_type: SYS_EXEC
|
|
*
|
|
* The parameters for this kernel call are:
|
|
* m_lsys_krn_sys_exec.endpt (process that did exec call)
|
|
* m_lsys_krn_sys_exec.stack (new stack pointer)
|
|
* m_lsys_krn_sys_exec.name (pointer to program name)
|
|
* m_lsys_krn_sys_exec.ip (new instruction pointer)
|
|
* m_lsys_krn_sys_exec.ps_str (struct ps_strings *)
|
|
*/
|
|
#include "kernel/system.h"
|
|
#include <string.h>
|
|
#include <minix/endpoint.h>
|
|
|
|
#if USE_EXEC
|
|
|
|
/*===========================================================================*
|
|
* do_exec *
|
|
*===========================================================================*/
|
|
int do_exec(struct proc * caller, message * m_ptr)
|
|
{
|
|
/* Handle sys_exec(). A process has done a successful EXEC. Patch it up. */
|
|
register struct proc *rp;
|
|
int proc_nr;
|
|
char name[PROC_NAME_LEN];
|
|
|
|
if(!isokendpt(m_ptr->m_lsys_krn_sys_exec.endpt, &proc_nr))
|
|
return EINVAL;
|
|
|
|
rp = proc_addr(proc_nr);
|
|
|
|
if(rp->p_misc_flags & MF_DELIVERMSG) {
|
|
rp->p_misc_flags &= ~MF_DELIVERMSG;
|
|
}
|
|
|
|
/* Save command name for debugging, ps(1) output, etc. */
|
|
if(data_copy(caller->p_endpoint, m_ptr->m_lsys_krn_sys_exec.name,
|
|
KERNEL, (vir_bytes) name,
|
|
(phys_bytes) sizeof(name) - 1) != OK)
|
|
strncpy(name, "<unset>", PROC_NAME_LEN);
|
|
|
|
name[sizeof(name)-1] = '\0';
|
|
|
|
/* Set process state. */
|
|
arch_proc_init(rp,
|
|
(u32_t) m_ptr->m_lsys_krn_sys_exec.ip,
|
|
(u32_t) m_ptr->m_lsys_krn_sys_exec.stack,
|
|
(u32_t) m_ptr->m_lsys_krn_sys_exec.ps_str, name);
|
|
|
|
/* No reply to EXEC call */
|
|
RTS_UNSET(rp, RTS_RECEIVING);
|
|
|
|
/* Mark fpu_regs contents as not significant, so fpu
|
|
* will be initialized, when it's used next time. */
|
|
rp->p_misc_flags &= ~MF_FPU_INITIALIZED;
|
|
/* force reloading FPU if the current process is the owner */
|
|
release_fpu(rp);
|
|
return(OK);
|
|
}
|
|
#endif /* USE_EXEC */
|