6f77685609
mainly in the kernel and headers. This split based on work by Ingmar Alting <iaalting@cs.vu.nl> done for his Minix PowerPC architecture port. . kernel does not program the interrupt controller directly, do any other architecture-dependent operations, or contain assembly any more, but uses architecture-dependent functions in arch/$(ARCH)/. . architecture-dependent constants and types defined in arch/$(ARCH)/include. . <ibm/portio.h> moved to <minix/portio.h>, as they have become, for now, architecture-independent functions. . int86, sdevio, readbios, and iopenable are now i386-specific kernel calls and live in arch/i386/do_* now. . i386 arch now supports even less 86 code; e.g. mpx86.s and klib86.s have gone, and 'machine.protected' is gone (and always taken to be 1 in i386). If 86 support is to return, it should be a new architecture. . prototypes for the architecture-dependent functions defined in kernel/arch/$(ARCH)/*.c but used in kernel/ are in kernel/proto.h . /etc/make.conf included in makefiles and shell scripts that need to know the building architecture; it defines ARCH=<arch>, currently only i386. . some basic per-architecture build support outside of the kernel (lib) . in clock.c, only dequeue a process if it was ready . fixes for new include files files deleted: . mpx/klib.s - only for choosing between mpx/klib86 and -386 . klib86.s - only for 86 i386-specific files files moved (or arch-dependent stuff moved) to arch/i386/: . mpx386.s (entry point) . klib386.s . sconst.h . exception.c . protect.c . protect.h . i8269.c
60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
/* The kernel call implemented in this file:
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* m_type: SYS_EXEC
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*
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* The parameters for this kernel call are:
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* m1_i1: PR_ENDPT (process that did exec call)
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* m1_p1: PR_STACK_PTR (new stack pointer)
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* m1_p2: PR_NAME_PTR (pointer to program name)
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* m1_p3: PR_IP_PTR (new instruction pointer)
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*/
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#include "../system.h"
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#include <string.h>
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#include <signal.h>
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#include <minix/endpoint.h>
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#if USE_EXEC
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/*===========================================================================*
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* do_exec *
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*===========================================================================*/
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PUBLIC int do_exec(m_ptr)
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register message *m_ptr; /* pointer to request message */
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{
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/* Handle sys_exec(). A process has done a successful EXEC. Patch it up. */
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register struct proc *rp;
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reg_t sp; /* new sp */
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phys_bytes phys_name;
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char *np;
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int proc;
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if(!isokendpt(m_ptr->PR_ENDPT, &proc))
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return EINVAL;
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rp = proc_addr(proc);
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sp = (reg_t) m_ptr->PR_STACK_PTR;
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rp->p_reg.sp = sp; /* set the stack pointer */
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#if (_MINIX_CHIP == _CHIP_INTEL)
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/* wipe extra LDT entries */
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phys_memset(vir2phys(&rp->p_seg.p_ldt[EXTRA_LDT_INDEX]), 0,
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(LDT_SIZE - EXTRA_LDT_INDEX) * sizeof(rp->p_seg.p_ldt[0]));
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#endif
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rp->p_reg.pc = (reg_t) m_ptr->PR_IP_PTR; /* set pc */
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rp->p_rts_flags &= ~RECEIVING; /* PM does not reply to EXEC call */
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if (rp->p_rts_flags == 0) lock_enqueue(rp);
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/* Save command name for debugging, ps(1) output, etc. */
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phys_name = numap_local(who_p, (vir_bytes) m_ptr->PR_NAME_PTR,
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(vir_bytes) P_NAME_LEN - 1);
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if (phys_name != 0) {
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phys_copy(phys_name, vir2phys(rp->p_name), (phys_bytes) P_NAME_LEN - 1);
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for (np = rp->p_name; (*np & BYTE) >= ' '; np++) {}
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*np = 0; /* mark end */
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} else {
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strncpy(rp->p_name, "<unset>", P_NAME_LEN);
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}
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return(OK);
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}
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#endif /* USE_EXEC */
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