34#include <sys/imgact.h>
35#include <sys/imgact_aout.h>
36#include <sys/kernel.h>
37#include <sys/limits.h>
39#include <sys/malloc.h>
43#include <sys/resourcevar.h>
44#include <sys/signalvar.h>
45#include <sys/syscall.h>
46#include <sys/sysent.h>
50#include <machine/frame.h>
51#include <machine/md_var.h>
56#include <vm/vm_object.h>
57#include <vm/vm_param.h>
60#include <compat/freebsd32/freebsd32_signal.h>
61#include <compat/freebsd32/freebsd32_util.h>
62#include <compat/freebsd32/freebsd32_proto.h>
63#include <compat/freebsd32/freebsd32_syscall.h>
64#include <compat/ia32/ia32_signal.h>
68static int aout_fixup(uintptr_t *stack_base,
struct image_params *imgp);
70#define AOUT32_USRSTACK 0xbfc00000
74#define AOUT32_PS_STRINGS (AOUT32_USRSTACK - sizeof(struct ps_strings))
76struct sysentvec aout_sysvec = {
77 .sv_size = SYS_MAXSYSCALL,
81 .sv_sendsig = sendsig,
82 .sv_sigcode = sigcode,
83 .sv_szsigcode = &szsigcode,
84 .sv_name =
"FreeBSD a.out",
86 .sv_imgact_try = NULL,
87 .sv_minsigstksz = MINSIGSTKSZ,
88 .sv_minuser = VM_MIN_ADDRESS,
91 .sv_psstrings = AOUT32_PS_STRINGS,
92 .sv_psstringssz =
sizeof(
struct ps_strings),
93 .sv_stackprot = VM_PROT_ALL,
95 .sv_setregs = exec_setregs,
98 .sv_flags = SV_ABI_FREEBSD | SV_AOUT | SV_IA32 | SV_ILP32,
99 .sv_set_syscall_retval = cpu_set_syscall_retval,
100 .sv_fetch_syscall_args = cpu_fetch_syscall_args,
102 .sv_schedtail = NULL,
103 .sv_thread_detach = NULL,
107 .sv_set_fork_retval = x86_set_fork_retval,
110#elif defined(__amd64__)
112#include "vdso_ia32_offsets.h"
114extern const char _binary_elf_vdso32_so_1_start[];
115extern const char _binary_elf_vdso32_so_1_end[];
116extern char _binary_elf_vdso32_so_1_size;
118#define AOUT32_PS_STRINGS \
119 (AOUT32_USRSTACK - sizeof(struct freebsd32_ps_strings))
120#define AOUT32_MINUSER FREEBSD32_MINUSER
122extern const char *freebsd32_syscallnames[];
123extern u_long ia32_maxssiz;
125static int aout_szsigcode;
127struct sysentvec aout_sysvec = {
128 .sv_size = FREEBSD32_SYS_MAXSYSCALL,
129 .sv_table = freebsd32_sysent,
130 .sv_transtrap = NULL,
132 .sv_sendsig = ia32_sendsig,
133 .sv_sigcode = _binary_elf_vdso32_so_1_start,
134 .sv_szsigcode = &aout_szsigcode,
135 .sv_name =
"FreeBSD a.out",
137 .sv_imgact_try = NULL,
138 .sv_minsigstksz = MINSIGSTKSZ,
139 .sv_minuser = AOUT32_MINUSER,
142 .sv_psstrings = AOUT32_PS_STRINGS,
143 .sv_psstringssz =
sizeof(
struct freebsd32_ps_strings),
144 .sv_stackprot = VM_PROT_ALL,
145 .sv_copyout_strings = freebsd32_copyout_strings,
146 .sv_setregs = ia32_setregs,
147 .sv_fixlimit = ia32_fixlimit,
148 .sv_maxssiz = &ia32_maxssiz,
149 .sv_flags = SV_ABI_FREEBSD | SV_AOUT | SV_IA32 | SV_ILP32,
150 .sv_set_syscall_retval = ia32_set_syscall_retval,
151 .sv_fetch_syscall_args = ia32_fetch_syscall_args,
152 .sv_syscallnames = freebsd32_syscallnames,
155 .sv_set_fork_retval = x86_set_fork_retval,
159aout_sysent(
void *arg __unused)
161 aout_szsigcode = (int)(uintptr_t)&_binary_elf_vdso32_so_1_size;
163SYSINIT(aout_sysent, SI_SUB_EXEC, SI_ORDER_ANY, aout_sysent, NULL);
165#error "Only ia32 arch is supported"
172 *stack_base -=
sizeof(uint32_t);
173 if (suword32((
void *)*stack_base, imgp->args->argc) != 0)
181 const struct exec *a_out;
182 struct vmspace *vmspace;
185 vm_offset_t text_end, data_end;
186 unsigned long virtual_offset;
187 unsigned long file_offset;
188 unsigned long bss_size;
191 a_out = (
const struct exec *)imgp->image_header;
199 if (((a_out->a_midmag >> 16) & 0xff) != 0x86 &&
200 ((a_out->a_midmag >> 16) & 0xff) != 0 &&
201 ((((int)ntohl(a_out->a_midmag)) >> 16) & 0xff) != 0x86)
209 switch ((
int)(a_out->a_midmag & 0xffff)) {
213 file_offset = PAGE_SIZE;
220 virtual_offset = PAGE_SIZE;
223 if (N_GETMID(*a_out) == MID_ZERO)
224 imgp->ps_strings = (
void *)aout_sysvec.sv_psstrings;
228 switch ((
int)(ntohl(a_out->a_midmag) & 0xffff)) {
231 virtual_offset = PAGE_SIZE;
239 bss_size = roundup(a_out->a_bss, PAGE_SIZE);
245 a_out->a_entry < virtual_offset ||
246 a_out->a_entry >= virtual_offset + a_out->a_text ||
249 a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK
254 virtual_offset + a_out->a_text + a_out->a_data + bss_size > UINT_MAX
260 if (a_out->a_data + a_out->a_text > imgp->attr->va_size)
266 PROC_LOCK(imgp->proc);
271 a_out->a_data + bss_size >
lim_cur_proc(imgp->proc, RLIMIT_DATA) ||
272 racct_set(imgp->proc, RACCT_DATA, a_out->a_data + bss_size) != 0) {
273 PROC_UNLOCK(imgp->proc);
276 PROC_UNLOCK(imgp->proc);
286 VOP_UNLOCK(imgp->vp);
293 vn_lock(imgp->vp, LK_SHARED | LK_RETRY);
300 vmspace = imgp->proc->p_vmspace;
302 object = imgp->object;
303 map = &vmspace->vm_map;
305 vm_object_reference(
object);
307 text_end = virtual_offset + a_out->a_text;
308 error = vm_map_insert(map,
object,
310 virtual_offset, text_end,
311 VM_PROT_READ | VM_PROT_EXECUTE, VM_PROT_ALL,
312 MAP_COPY_ON_WRITE | MAP_PREFAULT | MAP_VN_EXEC);
315 vm_object_deallocate(
object);
318 VOP_SET_TEXT_CHECKED(imgp->vp);
319 data_end = text_end + a_out->a_data;
321 vm_object_reference(
object);
322 error = vm_map_insert(map,
object,
323 file_offset + a_out->a_text,
325 VM_PROT_ALL, VM_PROT_ALL,
326 MAP_COPY_ON_WRITE | MAP_PREFAULT | MAP_VN_EXEC);
329 vm_object_deallocate(
object);
332 VOP_SET_TEXT_CHECKED(imgp->vp);
336 error = vm_map_insert(map, NULL, 0,
337 data_end, data_end + bss_size,
338 VM_PROT_ALL, VM_PROT_ALL, 0);
347 vmspace->vm_tsize = a_out->a_text >> PAGE_SHIFT;
348 vmspace->vm_dsize = (a_out->a_data + bss_size) >> PAGE_SHIFT;
349 vmspace->vm_taddr = (caddr_t) (uintptr_t) virtual_offset;
350 vmspace->vm_daddr = (caddr_t) (uintptr_t)
351 (virtual_offset + a_out->a_text);
358 imgp->interpreted = 0;
359 imgp->entry_addr = a_out->a_entry;
361 imgp->proc->p_sysent = &aout_sysvec;
EXEC_SET(aout, aout_execsw)
static int exec_aout_imgact(struct image_params *imgp)
static struct execsw aout_execsw
static int aout_fixup(uintptr_t *stack_base, struct image_params *imgp)
SYSINIT(imgact_binmisc, SI_SUB_EXEC, SI_ORDER_MIDDLE, imgact_binmisc_init, NULL)
void exec_onexec_old(struct thread *td)
int exec_new_vmspace(struct image_params *imgp, struct sysentvec *sv)
static const struct execsw ** execsw
int exec_map_stack(struct image_params *imgp)
int exec_copyout_strings(struct image_params *imgp, uintptr_t *stack_base)
void exit_onexit(struct proc *p)
rlim_t lim_cur_proc(struct proc *p, int which)
const char * syscallnames[]