2 * Copyright (c) 2002 Doug Rabson
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #define __ELF_WORD_SIZE 32
31 #include <sys/param.h>
33 #include <sys/fcntl.h>
34 #include <sys/imgact.h>
35 #include <sys/kernel.h>
37 #include <sys/malloc.h>
38 #include <sys/mutex.h>
40 #include <sys/namei.h>
41 #include <sys/pioctl.h>
43 #include <sys/procfs.h>
44 #include <sys/resourcevar.h>
45 #include <sys/systm.h>
46 #include <sys/signalvar.h>
49 #include <sys/syscall.h>
50 #include <sys/sysctl.h>
51 #include <sys/sysent.h>
52 #include <sys/vnode.h>
53 #include <sys/imgact_elf.h>
56 #include <vm/vm_kern.h>
57 #include <vm/vm_param.h>
59 #include <vm/vm_map.h>
60 #include <vm/vm_object.h>
61 #include <vm/vm_extern.h>
63 #include <ia64/ia32/ia32_util.h>
64 #include <i386/include/psl.h>
65 #include <i386/include/segments.h>
66 #include <i386/include/specialreg.h>
67 #include <machine/frame.h>
68 #include <machine/md_var.h>
70 static register_t *ia32_copyout_strings(struct image_params *imgp);
71 static void ia32_setregs(struct thread *td, u_long entry, u_long stack,
74 extern struct sysent ia32_sysent[];
76 static char ia32_sigcode[] = {
77 0xff, 0x54, 0x24, 0x10, /* call *SIGF_HANDLER(%esp) */
78 0x8d, 0x44, 0x24, 0x14, /* lea SIGF_UC(%esp),%eax */
79 0x50, /* pushl %eax */
80 0xf7, 0x40, 0x54, 0x00, 0x00, 0x02, 0x02, /* testl $PSL_VM,UC_EFLAGS(%eax) */
81 0x75, 0x03, /* jne 9f */
82 0x8e, 0x68, 0x14, /* movl UC_GS(%eax),%gs */
83 0xb8, 0x57, 0x01, 0x00, 0x00, /* 9: movl $SYS_sigreturn,%eax */
84 0x50, /* pushl %eax */
85 0xcd, 0x80, /* int $0x80 */
86 0xeb, 0xfe, /* 0: jmp 0b */
89 static int ia32_szsigcode = sizeof(ia32_sigcode) & ~3;
91 struct sysentvec ia32_freebsd_sysvec = {
112 ia32_copyout_strings,
116 static Elf32_Brandinfo ia32_brand_info = {
121 "/usr/libexec/ld-elf.so.1",
125 SYSINIT(ia32, SI_SUB_EXEC, SI_ORDER_ANY,
126 (sysinit_cfunc_t) elf32_insert_brand_entry,
130 ia32_copyout_strings(struct image_params *imgp)
134 char *stringp, *destp;
135 u_int32_t *stack_base;
136 struct ia32_ps_strings *arginfo;
140 * Calculate string base and vector table pointers.
141 * Also deal with signal trampoline code for this exec type.
143 arginfo = (struct ia32_ps_strings *)IA32_PS_STRINGS;
144 szsigcode = *(imgp->proc->p_sysent->sv_szsigcode);
145 destp = (caddr_t)arginfo - szsigcode - SPARE_USRSPACE -
146 roundup((ARG_MAX - imgp->stringspace), sizeof(char *));
152 copyout(imgp->proc->p_sysent->sv_sigcode,
153 ((caddr_t)arginfo - szsigcode), szsigcode);
156 * If we have a valid auxargs ptr, prepare some room
161 * 'AT_COUNT*2' is size for the ELF Auxargs data. This is for
162 * lower compatibility.
164 imgp->auxarg_size = (imgp->auxarg_size) ? imgp->auxarg_size
167 * The '+ 2' is for the null pointers at the end of each of
168 * the arg and env vector sets,and imgp->auxarg_size is room
169 * for argument of Runtime loader.
171 vectp = (u_int32_t *) (destp - (imgp->argc + imgp->envc + 2 +
172 imgp->auxarg_size) * sizeof(u_int32_t));
176 * The '+ 2' is for the null pointers at the end of each of
177 * the arg and env vector sets
179 vectp = (u_int32_t *)
180 (destp - (imgp->argc + imgp->envc + 2) * sizeof(u_int32_t));
183 * vectp also becomes our initial stack base
187 stringp = imgp->stringbase;
192 * Copy out strings - arguments and environment.
194 copyout(stringp, destp, ARG_MAX - imgp->stringspace);
197 * Fill in "ps_strings" struct for ps, w, etc.
199 suword32(&arginfo->ps_argvstr, (u_int32_t)(intptr_t)vectp);
200 suword32(&arginfo->ps_nargvstr, argc);
203 * Fill in argument portion of vector table.
205 for (; argc > 0; --argc) {
206 suword32(vectp++, (u_int32_t)(intptr_t)destp);
207 while (*stringp++ != 0)
212 /* a null vector table pointer separates the argp's from the envp's */
213 suword32(vectp++, 0);
215 suword32(&arginfo->ps_envstr, (u_int32_t)(intptr_t)vectp);
216 suword32(&arginfo->ps_nenvstr, envc);
219 * Fill in environment portion of vector table.
221 for (; envc > 0; --envc) {
222 suword32(vectp++, (u_int32_t)(intptr_t)destp);
223 while (*stringp++ != 0)
228 /* end of vector table is a null pointer */
231 return ((register_t *)stack_base);
235 ia32_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings)
237 struct trapframe *frame = td->td_frame;
238 vm_offset_t gdt, ldt;
239 u_int64_t codesel, datasel, ldtsel;
240 u_int64_t codeseg, dataseg, gdtseg, ldtseg;
241 struct segment_descriptor desc;
242 struct vmspace *vmspace = td->td_proc->p_vmspace;
245 * Make sure that we restore the entire trapframe after an
248 frame->tf_flags &= ~FRAME_SYSCALL;
250 bzero(frame->tf_r, sizeof(frame->tf_r));
251 bzero(frame->tf_f, sizeof(frame->tf_f));
253 frame->tf_cr_iip = entry;
254 frame->tf_cr_ipsr = (IA64_PSR_IC
262 | IA64_PSR_CPL_USER);
263 frame->tf_r[FRAME_R12] = stack;
265 codesel = LSEL(LUCODE_SEL, SEL_UPL);
266 datasel = LSEL(LUDATA_SEL, SEL_UPL);
267 ldtsel = GSEL(GLDT_SEL, SEL_UPL);
270 frame->tf_r[FRAME_R16] = (datasel << 48) | (datasel << 32)
271 | (datasel << 16) | datasel;
272 frame->tf_r[FRAME_R17] = (ldtsel << 32) | (datasel << 16) | codesel;
274 frame->tf_r[FRAME_R16] = datasel;
275 frame->tf_r[FRAME_R17] = codesel;
276 frame->tf_r[FRAME_R18] = datasel;
277 frame->tf_r[FRAME_R19] = datasel;
278 frame->tf_r[FRAME_R20] = datasel;
279 frame->tf_r[FRAME_R21] = datasel;
280 frame->tf_r[FRAME_R22] = ldtsel;
284 * Build the GDT and LDT.
287 vm_map_find(&vmspace->vm_map, 0, 0,
289 VM_PROT_ALL, VM_PROT_ALL, 0);
292 desc.sd_lolimit = 8*NLDT-1;
293 desc.sd_lobase = ldt & 0xffffff;
294 desc.sd_type = SDT_SYSLDT;
295 desc.sd_dpl = SEL_UPL;
300 desc.sd_hibase = ldt >> 24;
301 copyout(&desc, (caddr_t) gdt + 8*GLDT_SEL, sizeof(desc));
303 desc.sd_lolimit = ((IA32_USRSTACK >> 12) - 1) & 0xffff;
305 desc.sd_type = SDT_MEMERA;
306 desc.sd_dpl = SEL_UPL;
308 desc.sd_hilimit = ((IA32_USRSTACK >> 12) - 1) >> 16;
312 copyout(&desc, (caddr_t) ldt + 8*LUCODE_SEL, sizeof(desc));
313 desc.sd_type = SDT_MEMRWA;
314 copyout(&desc, (caddr_t) ldt + 8*LUDATA_SEL, sizeof(desc));
316 codeseg = 0 /* base */
317 + (((IA32_USRSTACK >> 12) - 1) << 32) /* limit */
318 + ((long)SDT_MEMERA << 52)
319 + ((long)SEL_UPL << 57)
320 + (1L << 59) /* present */
321 + (1L << 62) /* 32 bits */
322 + (1L << 63); /* page granularity */
323 dataseg = 0 /* base */
324 + (((IA32_USRSTACK >> 12) - 1) << 32) /* limit */
325 + ((long)SDT_MEMRWA << 52)
326 + ((long)SEL_UPL << 57)
327 + (1L << 59) /* present */
328 + (1L << 62) /* 32 bits */
329 + (1L << 63); /* page granularity */
330 ia64_set_csd(codeseg);
331 ia64_set_ssd(dataseg);
332 frame->tf_r[FRAME_R24] = dataseg; /* ESD */
333 frame->tf_r[FRAME_R27] = dataseg; /* DSD */
334 frame->tf_r[FRAME_R28] = dataseg; /* FSD */
335 frame->tf_r[FRAME_R29] = dataseg; /* GSD */
337 gdtseg = gdt /* base */
338 + ((8L*NGDT - 1) << 32) /* limit */
339 + ((long)SDT_SYSNULL << 52)
340 + ((long)SEL_UPL << 57)
341 + (1L << 59) /* present */
342 + (0L << 62) /* 16 bits */
343 + (0L << 63); /* byte granularity */
344 ldtseg = ldt /* base */
345 + ((8L*NLDT - 1) << 32) /* limit */
346 + ((long)SDT_SYSLDT << 52)
347 + ((long)SEL_UPL << 57)
348 + (1L << 59) /* present */
349 + (0L << 62) /* 16 bits */
350 + (0L << 63); /* byte granularity */
351 frame->tf_r[FRAME_R30] = ldtseg; /* LDTD */
352 frame->tf_r[FRAME_R31] = gdtseg; /* GDTD */
354 ia64_set_eflag(PSL_USER);
356 /* PS_STRINGS value for BSD/OS binaries. It is 0 for non-BSD/OS. */
357 frame->tf_r[FRAME_R11] = IA32_PS_STRINGS;
360 * XXX - Linux emulator
361 * Make sure sure edx is 0x0 on entry. Linux binaries depend
364 td->td_retval[1] = 0;