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
106 lines
3.5 KiB
C
106 lines
3.5 KiB
C
/* The kernel call that is implemented in this file:
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* m_type: SYS_SIGSEND
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*
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* The parameters for this kernel call are:
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* m2_i1: SIG_ENDPT # process to call signal handler
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* m2_p1: SIG_CTXT_PTR # pointer to sigcontext structure
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* m2_i3: SIG_FLAGS # flags for S_SIGRETURN call
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*
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*/
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#include "../system.h"
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#include <signal.h>
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#include <string.h>
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#include <sys/sigcontext.h>
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#if USE_SIGSEND
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/*===========================================================================*
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* do_sigsend *
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*===========================================================================*/
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PUBLIC int do_sigsend(m_ptr)
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message *m_ptr; /* pointer to request message */
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{
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/* Handle sys_sigsend, POSIX-style signal handling. */
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struct sigmsg smsg;
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register struct proc *rp;
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phys_bytes src_phys, dst_phys;
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struct sigcontext sc, *scp;
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struct sigframe fr, *frp;
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int proc;
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if (!isokendpt(m_ptr->SIG_ENDPT, &proc)) return(EINVAL);
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if (iskerneln(proc)) return(EPERM);
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rp = proc_addr(proc);
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/* Get the sigmsg structure into our address space. */
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src_phys = umap_local(proc_addr(PM_PROC_NR), D, (vir_bytes)
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m_ptr->SIG_CTXT_PTR, (vir_bytes) sizeof(struct sigmsg));
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if (src_phys == 0) return(EFAULT);
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phys_copy(src_phys,vir2phys(&smsg),(phys_bytes) sizeof(struct sigmsg));
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/* Compute the user stack pointer where sigcontext will be stored. */
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scp = (struct sigcontext *) smsg.sm_stkptr - 1;
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/* Copy the registers to the sigcontext structure. */
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memcpy(&sc.sc_regs, (char *) &rp->p_reg, sizeof(struct sigregs));
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#ifdef POWERPC
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memcpy(&sc.sc_regs, (char *) &rp->p_reg, struct(stackframe_s));
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#else
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memcpy(&sc.sc_regs, (char *) &rp->p_reg, sizeof(struct sigregs));
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#endif
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/* Finish the sigcontext initialization. */
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sc.sc_flags = 0; /* unused at this time */
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sc.sc_mask = smsg.sm_mask;
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/* Copy the sigcontext structure to the user's stack. */
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dst_phys = umap_local(rp, D, (vir_bytes) scp,
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(vir_bytes) sizeof(struct sigcontext));
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if (dst_phys == 0) return(EFAULT);
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phys_copy(vir2phys(&sc), dst_phys, (phys_bytes) sizeof(struct sigcontext));
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/* Initialize the sigframe structure. */
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frp = (struct sigframe *) scp - 1;
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fr.sf_scpcopy = scp;
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fr.sf_retadr2= (void (*)()) rp->p_reg.pc;
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fr.sf_fp = rp->p_reg.fp;
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rp->p_reg.fp = (reg_t) &frp->sf_fp;
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fr.sf_scp = scp;
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fr.sf_code = 0; /* XXX - should be used for type of FP exception */
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fr.sf_signo = smsg.sm_signo;
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fr.sf_retadr = (void (*)()) smsg.sm_sigreturn;
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/* Copy the sigframe structure to the user's stack. */
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dst_phys = umap_local(rp, D, (vir_bytes) frp,
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(vir_bytes) sizeof(struct sigframe));
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if (dst_phys == 0) return(EFAULT);
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phys_copy(vir2phys(&fr), dst_phys, (phys_bytes) sizeof(struct sigframe));
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#if ( _MINIX_CHIP == _CHIP_POWERPC ) /* stuff that can't be done in the assembler code. */
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/* When the signal handlers C code is called it will write this value
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* into the signal frame (over the sf_retadr value).
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*/
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rp->p_reg.lr = smsg.sm_sigreturn;
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/* The first (and only) parameter for the user signal handler function.
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*/
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rp->p_reg.retreg = smsg.sm_signo; /* note the retreg == first argument */
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#endif
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/* Reset user registers to execute the signal handler. */
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rp->p_reg.sp = (reg_t) frp;
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rp->p_reg.pc = (reg_t) smsg.sm_sighandler;
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/* Reschedule if necessary. */
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if(rp->p_rts_flags & NO_PRIORITY) {
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rp->p_rts_flags &= ~NO_PRIORITY;
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if (rp->p_rts_flags == 0) lock_enqueue(rp);
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} else kprintf("system: warning: sigsend a running process\n");
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return(OK);
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}
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#endif /* USE_SIGSEND */
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