3ebc124838
handler in the kernel at the same time. Also, allow for the exec_new_vmspace() code to build a different sized vmspace depending on the executable environment. This is a big help for execing i386 binaries on ia64. The ELF exec code grows the ability to map partial pages when there is a page size difference, eg: emulating 4K pages on 8K or 16K hardware pages. Flesh out the i386 emulation support for ia64. At this point, the only binary that I know of that fails is cvsup, because the cvsup runtime tries to execute code in pages not marked executable. Obtained from: dfr (mostly, many tweaks from me).
95 lines
3.0 KiB
C
95 lines
3.0 KiB
C
/*-
|
|
* Copyright (c) 1998-1999 Andrew Gallatin
|
|
* All rights reserved.
|
|
*
|
|
* 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
|
|
* in this position and unchanged.
|
|
* 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.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software withough specific prior written permission
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_param.h>
|
|
#include <vm/pmap.h>
|
|
|
|
|
|
#include <sys/exec.h>
|
|
#include <sys/sysent.h>
|
|
#include <sys/cdefs.h>
|
|
|
|
|
|
#ifndef SCARG
|
|
#define SCARG(p, x) (p)->x
|
|
#endif
|
|
|
|
struct ia32_ps_strings {
|
|
u_int32_t ps_argvstr; /* first of 0 or more argument strings */
|
|
int ps_nargvstr; /* the number of argument strings */
|
|
u_int32_t ps_envstr; /* first of 0 or more environment strings */
|
|
int ps_nenvstr; /* the number of environment strings */
|
|
};
|
|
|
|
#define IA32_USRSTACK (4L*1024*1024*1024 - PAGE_SIZE)
|
|
#define IA32_PS_STRINGS (IA32_USRSTACK - sizeof(struct ia32_ps_strings))
|
|
|
|
static __inline caddr_t stackgap_init(void);
|
|
static __inline void *stackgap_alloc(caddr_t *, size_t);
|
|
|
|
static __inline caddr_t
|
|
stackgap_init()
|
|
{
|
|
#define szsigcode (*(curproc->p_sysent->sv_szsigcode))
|
|
return (caddr_t)(((caddr_t)IA32_PS_STRINGS) - szsigcode - SPARE_USRSPACE);
|
|
#undef szsigcode
|
|
}
|
|
|
|
static __inline void *
|
|
stackgap_alloc(sgp, sz)
|
|
caddr_t *sgp;
|
|
size_t sz;
|
|
{
|
|
void *p;
|
|
|
|
p = (void *) *sgp;
|
|
*sgp += ALIGN(sz);
|
|
return p;
|
|
}
|
|
|
|
|
|
extern const char ia32_emul_path[];
|
|
int ia32_emul_find(struct thread *, caddr_t *, const char *, char *,
|
|
char **, int);
|
|
|
|
#define CHECKALT(p, sgp, path, i) \
|
|
do { \
|
|
int _error; \
|
|
\
|
|
_error = ia32_emul_find(p, sgp, ia32_emul_path, path, \
|
|
&path, i); \
|
|
if (_error == EFAULT) \
|
|
return (_error); \
|
|
} while (0)
|
|
|
|
#define CHECKALTEXIST(p, sgp, path) CHECKALT((p), (sgp), (path), 0)
|
|
#define CHECKALTCREAT(p, sgp, path) CHECKALT((p), (sgp), (path), 1)
|