b4cf0e62f4
of the ABI of the currently executing image. Change some places to test the flags instead of explicit comparing with address of known sysentvec structures to determine ABI features. Discussed with: dchagin, imp, jhb, peter
182 lines
6.4 KiB
C
182 lines
6.4 KiB
C
/*-
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* Copyright (c) 1982, 1988, 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_SYSENT_H_
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#define _SYS_SYSENT_H_
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#include <bsm/audit.h>
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struct rlimit;
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struct sysent;
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struct thread;
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struct ksiginfo;
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typedef int sy_call_t(struct thread *, void *);
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/* Used by the machine dependent syscall() code. */
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typedef void (*systrace_probe_func_t)(u_int32_t, int, struct sysent *, void *);
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/*
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* Used by loaded syscalls to convert arguments to a DTrace array
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* of 64-bit arguments.
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*/
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typedef void (*systrace_args_func_t)(int, void *, u_int64_t *, int *);
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extern systrace_probe_func_t systrace_probe_func;
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struct sysent { /* system call table */
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int sy_narg; /* number of arguments */
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sy_call_t *sy_call; /* implementing function */
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au_event_t sy_auevent; /* audit event associated with syscall */
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systrace_args_func_t sy_systrace_args_func;
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/* optional argument conversion function. */
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u_int32_t sy_entry; /* DTrace entry ID for systrace. */
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u_int32_t sy_return; /* DTrace return ID for systrace. */
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};
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struct image_params;
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struct __sigset;
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struct trapframe;
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struct vnode;
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struct sysentvec {
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int sv_size; /* number of entries */
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struct sysent *sv_table; /* pointer to sysent */
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u_int sv_mask; /* optional mask to index */
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int sv_sigsize; /* size of signal translation table */
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int *sv_sigtbl; /* signal translation table */
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int sv_errsize; /* size of errno translation table */
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int *sv_errtbl; /* errno translation table */
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int (*sv_transtrap)(int, int);
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/* translate trap-to-signal mapping */
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int (*sv_fixup)(register_t **, struct image_params *);
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/* stack fixup function */
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void (*sv_sendsig)(void (*)(int), struct ksiginfo *, struct __sigset *);
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/* send signal */
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char *sv_sigcode; /* start of sigtramp code */
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int *sv_szsigcode; /* size of sigtramp code */
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void (*sv_prepsyscall)(struct trapframe *, int *, u_int *,
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caddr_t *);
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char *sv_name; /* name of binary type */
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int (*sv_coredump)(struct thread *, struct vnode *, off_t);
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/* function to dump core, or NULL */
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int (*sv_imgact_try)(struct image_params *);
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int sv_minsigstksz; /* minimum signal stack size */
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int sv_pagesize; /* pagesize */
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vm_offset_t sv_minuser; /* VM_MIN_ADDRESS */
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vm_offset_t sv_maxuser; /* VM_MAXUSER_ADDRESS */
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vm_offset_t sv_usrstack; /* USRSTACK */
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vm_offset_t sv_psstrings; /* PS_STRINGS */
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int sv_stackprot; /* vm protection for stack */
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register_t *(*sv_copyout_strings)(struct image_params *);
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void (*sv_setregs)(struct thread *, u_long, u_long, u_long);
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void (*sv_fixlimit)(struct rlimit *, int);
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u_long *sv_maxssiz;
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u_int sv_flags;
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};
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#define SV_ILP32 0x000100
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#define SV_LP64 0x000200
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#define SV_IA32 0x004000
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#define SV_AOUT 0x008000
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#define SV_ABI_MASK 0xff
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#define SV_CURPROC_FLAG(x) (curproc->p_sysent->sv_flags & (x))
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#define SV_CURPROC_ABI() (curproc->p_sysent->sv_flags & SV_ABI_MASK)
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/* same as ELFOSABI_XXX, to prevent header pollution */
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#define SV_ABI_LINUX 3
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#define SV_ABI_FREEBSD 9
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#define SV_ABI_UNDEF 255
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#ifdef _KERNEL
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extern struct sysentvec aout_sysvec;
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extern struct sysentvec elf_freebsd_sysvec;
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extern struct sysentvec null_sysvec;
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extern struct sysent sysent[];
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#define NO_SYSCALL (-1)
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struct module;
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struct syscall_module_data {
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int (*chainevh)(struct module *, int, void *); /* next handler */
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void *chainarg; /* arg for next event handler */
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int *offset; /* offset into sysent */
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struct sysent *new_sysent; /* new sysent */
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struct sysent old_sysent; /* old sysent */
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};
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#define MAKE_SYSENT(syscallname) \
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static struct sysent syscallname##_sysent = { \
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(sizeof(struct syscallname ## _args ) \
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/ sizeof(register_t)), \
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(sy_call_t *)& syscallname, \
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SYS_AUE_##syscallname \
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}
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#define SYSCALL_MODULE(name, offset, new_sysent, evh, arg) \
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static struct syscall_module_data name##_syscall_mod = { \
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evh, arg, offset, new_sysent, { 0, NULL, AUE_NULL } \
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}; \
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\
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static moduledata_t name##_mod = { \
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#name, \
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syscall_module_handler, \
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&name##_syscall_mod \
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}; \
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DECLARE_MODULE(name, name##_mod, SI_SUB_SYSCALLS, SI_ORDER_MIDDLE)
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#define SYSCALL_MODULE_HELPER(syscallname) \
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static int syscallname##_syscall = SYS_##syscallname; \
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MAKE_SYSENT(syscallname); \
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SYSCALL_MODULE(syscallname, \
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& syscallname##_syscall, & syscallname##_sysent, \
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NULL, NULL)
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#define SYSCALL_MODULE_PRESENT(syscallname) \
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(sysent[SYS_##syscallname].sy_call != (sy_call_t *)lkmnosys && \
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sysent[SYS_##syscallname].sy_call != (sy_call_t *)lkmressys)
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int syscall_register(int *offset, struct sysent *new_sysent,
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struct sysent *old_sysent);
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int syscall_deregister(int *offset, struct sysent *old_sysent);
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int syscall_module_handler(struct module *mod, int what, void *arg);
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/* Special purpose system call functions. */
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struct nosys_args;
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int lkmnosys(struct thread *, struct nosys_args *);
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int lkmressys(struct thread *, struct nosys_args *);
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#endif /* _KERNEL */
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#endif /* !_SYS_SYSENT_H_ */
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