/* $NetBSD: linux_machdep.h,v 1.12 2025/05/19 06:16:24 andvar Exp $ */ /*- * Copyright (c) 1995, 2000, 2001 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Frank van der Linden and Emmanuel Dreyfus. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef _POWERPC_LINUX_MACHDEP_H #define _POWERPC_LINUX_MACHDEP_H #include <compat/linux/common/linux_types.h> #include <compat/linux/common/linux_signal.h> #include <compat/linux/common/linux_siginfo.h> /* * From Linux's include/asm-ppc/ptrace.h * Needed for sigcontext */ struct linux_pt_regs { #define lpt_regs_fixreg_begin lgpr[0] unsigned long lgpr[32]; #define lpt_regs_fixreg_end lgpr[31] unsigned long lnip; unsigned long lmsr; unsigned long lorig_gpr3; /* Used for restarting system calls */ unsigned long lctr; unsigned long llink; unsigned long lxer; unsigned long lccr; unsigned long lmq; /* 601 only (not used at present) */ /* Used on APUS to hold IPL value. */ unsigned long ltrap; /* Reason for being here */ unsigned long ldar; /* Fault registers */ unsigned long ldsisr; unsigned long lresult; /* Result of a system call */ }; /* * From Linux's include/asm-ppc/sigcontext.h * Linux/ppc calls that struct sigcontext_struct */ struct linux_sigcontext { unsigned long _unused[4]; int lsignal; unsigned long lhandler; unsigned long lmask; struct linux_pt_regs *lregs; }; /* * From Linux's include/asm-ppc/elf.h */ #define LINUX_ELF_NGREG 48 /* includes nip, msr, lr, etc. */ #define LINUX_ELF_NFPREG 33 /* includes fpscr */ typedef unsigned long linux_elf_greg_t; typedef linux_elf_greg_t linux_elf_gregset_t[LINUX_ELF_NGREG]; /* * From Linux's include/asm-ppc/ptrace.h */ #define LINUX__SIGNAL_FRAMESIZE 64 /* * We make the stack look like Linux expects it when calling a signal * handler, but use the BSD way of calling the handler and sigreturn(). * This means that we need to pass the pointer to the handler too. * It is appended to the frame to not interfere with the rest of it. * * The following is from Linux's arch/ppc/kern/signal.c: * * > When we have signals to deliver, we set up on the * > user stack, going down from the original stack pointer: * > a sigregs struct * > one or more sigcontext structs with * > a gap of LINUX__SIGNAL_FRAMESIZE bytes * > * > Each of these things must be a multiple of 16 bytes in size. * * linux_sigregs is a linux_sigframe on other Linux ports. Linux/PowerPC * defines a rt_sigframe struct, but it is only used for RT signals. for * non RT signals, struct sigregs is used instead. * * About the ltramp field: that trampoline code is not used. Instead, the * sigcode (7 bytes long) trampoline code, copied by exec() on program startup * is used. However, Linux binaries might expect it to be here. */ struct linux_sigregs { linux_elf_gregset_t lgp_regs; double lfp_regs[LINUX_ELF_NFPREG]; unsigned long ltramp[2]; /* * Programs using the rs6000/xcoff abi can save up to 19 gp regs * and 18 fp regs below sp before decrementing it. */ int labigap[56]; }; /* * The following is not from Linux, we define it for convenience. It is the * size of the abigap field of linux_sigregs. */ #define LINUX_ABIGAP (56*sizeof(int)) /* * linux sigframe in a nutshell (however we don't use it): * * struct linux_sigframe { * char _gap[LINUX__SIGNAL_FRAMESIZE]; * struct sigcontext lsc; * struct linux_sigregs lsg; * }; */ /* * From Linux's include/asm-ppc/ucontext.h */ struct linux_ucontext { unsigned long luc_flags; struct linux_ucontext *luc_link; linux_stack_t luc_stack; struct linux_sigcontext luc_context; linux_sigset_t luc_sigmask; /* mask last for extensibility */ }; /* * From Linux's arch/ppc/kernel/signal.c, the real rt_sigframe */ struct linux_rt_sigframe { unsigned long _unused[2]; struct linux_siginfo *lpinfo; void *lpuc; struct linux_siginfo linfo; struct linux_ucontext luc; }; /* * Major device numbers of VT device on both Linux and NetBSD. Used in * ugly patch to fake device numbers. * * LINUX_CONS_MAJOR is from Linux's include/linux/major.h */ #define LINUX_CONS_MAJOR 4 /* * Linux ioctl calls for the keyboard. * * From Linux's include/linux/kd.h */ #define LINUX_KDGKBMODE 0x4b44 #define LINUX_KDSKBMODE 0x4b45 #define LINUX_KDMKTONE 0x4b30 #define LINUX_KDSETMODE 0x4b3a #define LINUX_KDENABIO 0x4b36 #define LINUX_KDDISABIO 0x4b37 #define LINUX_KDGETLED 0x4b31 #define LINUX_KDSETLED 0x4b32 #define LINUX_KDGKBTYPE 0x4B33 #define LINUX_KDGKBENT 0x4B46 /* * Mode for KDSKBMODE which we don't have (we just use plain mode for this) * * From Linux's include/linux/kd.h */ #define LINUX_K_MEDIUMRAW 2 /* * VT ioctl calls in Linux (the ones that the pcvt emulation in * wscons can handle) * * From Linux's include/linux/vt.h */ #define LINUX_VT_OPENQRY 0x5600 #define LINUX_VT_GETMODE 0x5601 #define LINUX_VT_SETMODE 0x5602 #define LINUX_VT_GETSTATE 0x5603 #define LINUX_VT_RELDISP 0x5605 #define LINUX_VT_ACTIVATE 0x5606 #define LINUX_VT_WAITACTIVE 0x5607 #define LINUX_VT_DISALLOCATE 0x5608 /* * This range used by VMWare (XXX) * * From Linux's include/linux/vt.h * XXX It's not sure this s needed for powerpc */ #define LINUX_VMWARE_NONE 200 #define LINUX_VMWARE_LAST 237 /* * Range of ioctls to just pass on, so that modules (like VMWare) can * handle them. * * From Linux's include/linux/vt.h */ #define LINUX_IOCTL_MIN_PASS LINUX_VMWARE_NONE #define LINUX_IOCTL_MAX_PASS (LINUX_VMWARE_LAST+8) #ifdef _KERNEL __BEGIN_DECLS /* XXX from NetBSD/i386. Not arch dependent? */ void linux_syscall_intern(struct proc *); __END_DECLS #endif /* !_KERNEL */ #endif /* _POWERPC_LINUX_MACHDEP_H */
