static int
linux_fixup(register_t **stack_base, struct image_params *imgp)
{
register_t *argv, *envp;
argv = *stack_base;
envp = *stack_base + (imgp->args->argc + 1);
(*stack_base)--;
suword(*stack_base, (intptr_t)(void *)envp);
(*stack_base)--;
suword(*stack_base, (intptr_t)(void *)argv);
(*stack_base)--;
suword(*stack_base, imgp->args->argc);
return (0);
}
/*
* Set that machine state for performing an upcall that starts
* the entry function with the given argument.
*/
void
cpu_set_upcall(struct thread *td, void (*entry)(void *), void *arg,
stack_t *stack)
{
/*
* Do any extra cleaning that needs to be done.
* The thread may have optional components
* that are not present in a fresh thread.
* This may be a recycled thread so make it look
* as though it's newly allocated.
*/
cpu_thread_clean(td);
#ifdef COMPAT_FREEBSD32
if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) {
/*
* Set the trap frame to point at the beginning of the entry
* function.
*/
td->td_frame->tf_rbp = 0;
td->td_frame->tf_rsp =
(((uintptr_t)stack->ss_sp + stack->ss_size - 4) & ~0x0f) - 4;
td->td_frame->tf_rip = (uintptr_t)entry;
/* Return address sentinel value to stop stack unwinding. */
suword32((void *)td->td_frame->tf_rsp, 0);
/* Pass the argument to the entry point. */
suword32((void *)(td->td_frame->tf_rsp + sizeof(int32_t)),
(uint32_t)(uintptr_t)arg);
return;
}
#endif
/*
* Set the trap frame to point at the beginning of the uts
* function.
*/
td->td_frame->tf_rbp = 0;
td->td_frame->tf_rsp =
((register_t)stack->ss_sp + stack->ss_size) & ~0x0f;
td->td_frame->tf_rsp -= 8;
td->td_frame->tf_rip = (register_t)entry;
td->td_frame->tf_ds = _udatasel;
td->td_frame->tf_es = _udatasel;
td->td_frame->tf_fs = _ufssel;
td->td_frame->tf_gs = _ugssel;
td->td_frame->tf_flags = TF_HASSEGS;
/* Return address sentinel value to stop stack unwinding. */
suword((void *)td->td_frame->tf_rsp, 0);
/* Pass the argument to the entry point. */
td->td_frame->tf_rdi = (register_t)arg;
}
times()
{
register *p;
for(p = &u.u_utime; p < &u.u_utime+6;) {
suword(u.u_arg[0], *p++);
u.u_arg[0] =+ 2;
}
}
static int
elf_linux_fixup(register_t **stack_base, struct image_params *imgp)
{
struct proc *p;
Elf32_Auxargs *args;
Elf32_Addr *uplatform;
struct ps_strings *arginfo;
register_t *pos;
KASSERT(curthread->td_proc == imgp->proc,
("unsafe elf_linux_fixup(), should be curproc"));
p = imgp->proc;
arginfo = (struct ps_strings *)p->p_sysent->sv_psstrings;
uplatform = (Elf32_Addr *)((caddr_t)arginfo - linux_szplatform);
args = (Elf32_Auxargs *)imgp->auxargs;
pos = *stack_base + (imgp->args->argc + imgp->args->envc + 2);
AUXARGS_ENTRY(pos, LINUX_AT_HWCAP, cpu_feature);
/*
* Do not export AT_CLKTCK when emulating Linux kernel prior to 2.4.0,
* as it has appeared in the 2.4.0-rc7 first time.
* Being exported, AT_CLKTCK is returned by sysconf(_SC_CLK_TCK),
* glibc falls back to the hard-coded CLK_TCK value when aux entry
* is not present.
* Also see linux_times() implementation.
*/
if (linux_kernver(curthread) >= LINUX_KERNVER_2004000)
AUXARGS_ENTRY(pos, LINUX_AT_CLKTCK, stclohz);
AUXARGS_ENTRY(pos, AT_PHDR, args->phdr);
AUXARGS_ENTRY(pos, AT_PHENT, args->phent);
AUXARGS_ENTRY(pos, AT_PHNUM, args->phnum);
AUXARGS_ENTRY(pos, AT_PAGESZ, args->pagesz);
AUXARGS_ENTRY(pos, AT_FLAGS, args->flags);
AUXARGS_ENTRY(pos, AT_ENTRY, args->entry);
AUXARGS_ENTRY(pos, AT_BASE, args->base);
AUXARGS_ENTRY(pos, LINUX_AT_SECURE, 0);
AUXARGS_ENTRY(pos, AT_UID, imgp->proc->p_ucred->cr_ruid);
AUXARGS_ENTRY(pos, AT_EUID, imgp->proc->p_ucred->cr_svuid);
AUXARGS_ENTRY(pos, AT_GID, imgp->proc->p_ucred->cr_rgid);
AUXARGS_ENTRY(pos, AT_EGID, imgp->proc->p_ucred->cr_svgid);
AUXARGS_ENTRY(pos, LINUX_AT_PLATFORM, PTROUT(uplatform));
if (args->execfd != -1)
AUXARGS_ENTRY(pos, AT_EXECFD, args->execfd);
AUXARGS_ENTRY(pos, AT_NULL, 0);
free(imgp->auxargs, M_TEMP);
imgp->auxargs = NULL;
(*stack_base)--;
suword(*stack_base, (register_t)imgp->args->argc);
return (0);
}
static inline int
suword_lwpid(void *addr, lwpid_t lwpid)
{
int error;
if (SV_CURPROC_FLAG(SV_LP64))
error = suword(addr, lwpid);
else
error = suword32(addr, lwpid);
return (error);
}
static int
sparc_utrap_install(struct thread *td, char *args)
{
struct sparc_utrap_install_args uia;
struct sparc_utrap_args ua;
struct md_utrap *ut;
int error;
int i;
ut = td->td_proc->p_md.md_utrap;
if ((error = copyin(args, &uia, sizeof(uia))) != 0)
return (error);
if (uia.num < 0 || uia.num > UT_MAX ||
(uia.handlers == NULL && uia.num > 0))
return (EINVAL);
for (i = 0; i < uia.num; i++) {
if ((error = copyin(&uia.handlers[i], &ua, sizeof(ua))) != 0)
return (error);
if (ua.type != UTH_NOCHANGE &&
(ua.type < 0 || ua.type >= UT_MAX))
return (EINVAL);
if (ua.old_deferred != NULL) {
if ((error = suword(ua.old_deferred, 0)) != 0)
return (error);
}
if (ua.old_precise != NULL) {
error = suword(ua.old_precise,
ut != NULL ? (long)ut->ut_precise[ua.type] : 0);
if (error != 0)
return (error);
}
if (ua.type != UTH_NOCHANGE) {
if (ut == NULL) {
ut = utrap_alloc();
td->td_proc->p_md.md_utrap = ut;
}
ut->ut_precise[ua.type] = ua.new_precise;
}
}
return (0);
}
static int
elf_linux_fixup(register_t **stack_base, struct image_params *imgp)
{
Elf_Auxargs *args;
Elf_Addr *base;
Elf_Addr *pos;
struct ps_strings *arginfo;
struct proc *p;
int issetugid;
p = imgp->proc;
arginfo = (struct ps_strings *)p->p_sysent->sv_psstrings;
KASSERT(curthread->td_proc == imgp->proc,
("unsafe elf_linux_fixup(), should be curproc"));
base = (Elf64_Addr *)*stack_base;
args = (Elf64_Auxargs *)imgp->auxargs;
pos = base + (imgp->args->argc + imgp->args->envc + 2);
issetugid = p->p_flag & P_SUGID ? 1 : 0;
AUXARGS_ENTRY(pos, LINUX_AT_SYSINFO_EHDR,
imgp->proc->p_sysent->sv_shared_page_base);
AUXARGS_ENTRY(pos, LINUX_AT_HWCAP, cpu_feature);
AUXARGS_ENTRY(pos, LINUX_AT_CLKTCK, stclohz);
AUXARGS_ENTRY(pos, AT_PHDR, args->phdr);
AUXARGS_ENTRY(pos, AT_PHENT, args->phent);
AUXARGS_ENTRY(pos, AT_PHNUM, args->phnum);
AUXARGS_ENTRY(pos, AT_PAGESZ, args->pagesz);
AUXARGS_ENTRY(pos, AT_BASE, args->base);
AUXARGS_ENTRY(pos, AT_FLAGS, args->flags);
AUXARGS_ENTRY(pos, AT_ENTRY, args->entry);
AUXARGS_ENTRY(pos, AT_UID, imgp->proc->p_ucred->cr_ruid);
AUXARGS_ENTRY(pos, AT_EUID, imgp->proc->p_ucred->cr_svuid);
AUXARGS_ENTRY(pos, AT_GID, imgp->proc->p_ucred->cr_rgid);
AUXARGS_ENTRY(pos, AT_EGID, imgp->proc->p_ucred->cr_svgid);
AUXARGS_ENTRY(pos, LINUX_AT_SECURE, issetugid);
AUXARGS_ENTRY(pos, LINUX_AT_PLATFORM, PTROUT(linux_platform));
AUXARGS_ENTRY(pos, LINUX_AT_RANDOM, imgp->canary);
if (imgp->execpathp != 0)
AUXARGS_ENTRY(pos, LINUX_AT_EXECFN, imgp->execpathp);
if (args->execfd != -1)
AUXARGS_ENTRY(pos, AT_EXECFD, args->execfd);
AUXARGS_ENTRY(pos, AT_NULL, 0);
free(imgp->auxargs, M_TEMP);
imgp->auxargs = NULL;
base--;
suword(base, (uint64_t)imgp->args->argc);
*stack_base = (register_t *)base;
return (0);
}
static int
sparc_sigtramp_install(struct thread *td, char *args)
{
struct sparc_sigtramp_install_args sia;
struct proc *p;
int error;
p = td->td_proc;
if ((error = copyin(args, &sia, sizeof(sia))) != 0)
return (error);
if (sia.sia_old != NULL) {
if (suword(sia.sia_old, (long)p->p_md.md_sigtramp) != 0)
return (EFAULT);
}
p->p_md.md_sigtramp = sia.sia_new;
return (0);
}
void
cpu_set_upcall_kse(struct thread *td, void (*entry)(void *), void *arg,
stack_t *stack)
{
struct ia64_fdesc *fd;
struct trapframe *tf;
uint64_t ndirty, sp;
tf = td->td_frame;
ndirty = tf->tf_special.ndirty + (tf->tf_special.bspstore & 0x1ffUL);
KASSERT((ndirty & ~PAGE_MASK) == 0,
("Whoa there! We have more than 8KB of dirty registers!"));
fd = (struct ia64_fdesc *)entry;
sp = (uint64_t)stack->ss_sp;
bzero(&tf->tf_special, sizeof(tf->tf_special));
tf->tf_special.iip = fuword(&fd->func);
tf->tf_special.gp = fuword(&fd->gp);
tf->tf_special.sp = (sp + stack->ss_size - 16) & ~15;
tf->tf_special.rsc = 0xf;
tf->tf_special.fpsr = IA64_FPSR_DEFAULT;
tf->tf_special.psr = IA64_PSR_IC | IA64_PSR_I | IA64_PSR_IT |
IA64_PSR_DT | IA64_PSR_RT | IA64_PSR_DFH | IA64_PSR_BN |
IA64_PSR_CPL_USER;
if (tf->tf_flags & FRAME_SYSCALL) {
tf->tf_special.cfm = (3UL<<62) | (1UL<<7) | 1UL;
tf->tf_special.bspstore = sp + 8;
suword((caddr_t)sp, (uint64_t)arg);
} else {
tf->tf_special.cfm = (1UL<<63) | (1UL<<7) | 1UL;
tf->tf_special.bspstore = sp;
tf->tf_special.ndirty = 8;
sp = td->td_kstack + ndirty - 8;
if ((sp & 0x1ff) == 0x1f8) {
*(uint64_t*)sp = 0;
tf->tf_special.ndirty += 8;
sp -= 8;
}
*(uint64_t*)sp = (uint64_t)arg;
}
}
/*
* Copied from kern/kern_exec.c
*/
static register_t *
linux_copyout_strings(struct image_params *imgp)
{
int argc, envc;
char **vectp;
char *stringp, *destp;
register_t *stack_base;
struct ps_strings *arginfo;
struct proc *p;
/*
* Calculate string base and vector table pointers.
* Also deal with signal trampoline code for this exec type.
*/
p = imgp->proc;
arginfo = (struct ps_strings *)p->p_sysent->sv_psstrings;
destp = (caddr_t)arginfo - SPARE_USRSPACE - linux_szplatform -
roundup((ARG_MAX - imgp->args->stringspace), sizeof(char *));
/*
* install LINUX_PLATFORM
*/
copyout(linux_platform, ((caddr_t)arginfo - linux_szplatform),
linux_szplatform);
/*
* If we have a valid auxargs ptr, prepare some room
* on the stack.
*/
if (imgp->auxargs) {
/*
* 'AT_COUNT*2' is size for the ELF Auxargs data. This is for
* lower compatibility.
*/
imgp->auxarg_size = (imgp->auxarg_size) ? imgp->auxarg_size :
(LINUX_AT_COUNT * 2);
/*
* The '+ 2' is for the null pointers at the end of each of
* the arg and env vector sets,and imgp->auxarg_size is room
* for argument of Runtime loader.
*/
vectp = (char **)(destp - (imgp->args->argc +
imgp->args->envc + 2 + imgp->auxarg_size) * sizeof(char *));
} else {
/*
* The '+ 2' is for the null pointers at the end of each of
* the arg and env vector sets
*/
vectp = (char **)(destp - (imgp->args->argc + imgp->args->envc + 2) *
sizeof(char *));
}
/*
* vectp also becomes our initial stack base
*/
stack_base = (register_t *)vectp;
stringp = imgp->args->begin_argv;
argc = imgp->args->argc;
envc = imgp->args->envc;
/*
* Copy out strings - arguments and environment.
*/
copyout(stringp, destp, ARG_MAX - imgp->args->stringspace);
/*
* Fill in "ps_strings" struct for ps, w, etc.
*/
suword(&arginfo->ps_argvstr, (long)(intptr_t)vectp);
suword(&arginfo->ps_nargvstr, argc);
/*
* Fill in argument portion of vector table.
*/
for (; argc > 0; --argc) {
suword(vectp++, (long)(intptr_t)destp);
while (*stringp++ != 0)
destp++;
destp++;
}
/* a null vector table pointer separates the argp's from the envp's */
suword(vectp++, 0);
suword(&arginfo->ps_envstr, (long)(intptr_t)vectp);
suword(&arginfo->ps_nenvstr, envc);
/*
* Fill in environment portion of vector table.
*/
for (; envc > 0; --envc) {
suword(vectp++, (long)(intptr_t)destp);
while (*stringp++ != 0)
destp++;
destp++;
}
/* end of vector table is a null pointer */
suword(vectp, 0);
return (stack_base);
}
static void
netbsd32_sendsig_siginfo(const ksiginfo_t *ksi, const sigset_t *mask)
{
struct lwp *l = curlwp;
struct proc *p = l->l_proc;
struct sigacts *ps = p->p_sigacts;
int onstack;
int sig = ksi->ksi_signo;
ucontext32_t uc;
struct sparc32_sigframe_siginfo *fp;
netbsd32_intptr_t catcher;
struct trapframe64 *tf = l->l_md.md_tf;
struct rwindow32 *oldsp, *newsp;
int ucsz, error;
/* Need to attempt to zero extend this 32-bit pointer */
oldsp = (struct rwindow32*)(u_long)(u_int)tf->tf_out[6];
/* Do we need to jump onto the signal stack? */
onstack =
(l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 &&
(SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0;
/* Allocate space for the signal handler context. */
if (onstack)
fp = (struct sparc32_sigframe_siginfo *)
((char *)l->l_sigstk.ss_sp +
l->l_sigstk.ss_size);
else
fp = (struct sparc32_sigframe_siginfo *)oldsp;
fp = (struct sparc32_sigframe_siginfo*)((u_long)(fp - 1) & ~7);
/*
* Build the signal context to be used by sigreturn.
*/
uc.uc_flags = _UC_SIGMASK |
((l->l_sigstk.ss_flags & SS_ONSTACK)
? _UC_SETSTACK : _UC_CLRSTACK);
uc.uc_sigmask = *mask;
uc.uc_link = (uint32_t)(uintptr_t)l->l_ctxlink;
memset(&uc.uc_stack, 0, sizeof(uc.uc_stack));
sendsig_reset(l, sig);
/*
* Now copy the stack contents out to user space.
* We need to make sure that when we start the signal handler,
* its %i6 (%fp), which is loaded from the newly allocated stack area,
* joins seamlessly with the frame it was in when the signal occurred,
* so that the debugger and _longjmp code can back up through it.
* Since we're calling the handler directly, allocate a full size
* C stack frame.
*/
mutex_exit(p->p_lock);
cpu_getmcontext32(l, &uc.uc_mcontext, &uc.uc_flags);
ucsz = (int)(intptr_t)&uc.__uc_pad - (int)(intptr_t)&uc;
newsp = (struct rwindow32*)((intptr_t)fp - sizeof(struct frame32));
error = (copyout(&ksi->ksi_info, &fp->sf_si, sizeof ksi->ksi_info) ||
copyout(&uc, &fp->sf_uc, ucsz) ||
suword(&newsp->rw_in[6], (intptr_t)oldsp));
mutex_enter(p->p_lock);
if (error) {
/*
* Process has trashed its stack; give it an illegal
* instruction to halt it in its tracks.
*/
sigexit(l, SIGILL);
/* NOTREACHED */
}
switch (ps->sa_sigdesc[sig].sd_vers) {
default:
/* Unsupported trampoline version; kill the process. */
sigexit(l, SIGILL);
case 2:
/*
* Arrange to continue execution at the user's handler.
* It needs a new stack pointer, a return address and
* three arguments: (signo, siginfo *, ucontext *).
*/
catcher = (intptr_t)SIGACTION(p, sig).sa_handler;
tf->tf_pc = catcher;
tf->tf_npc = catcher + 4;
tf->tf_out[0] = sig;
tf->tf_out[1] = (intptr_t)&fp->sf_si;
tf->tf_out[2] = (intptr_t)&fp->sf_uc;
tf->tf_out[6] = (intptr_t)newsp;
tf->tf_out[7] = (intptr_t)ps->sa_sigdesc[sig].sd_tramp - 8;
break;
}
/* Remember that we're now on the signal stack. */
if (onstack)
l->l_sigstk.ss_flags |= SS_ONSTACK;
}
static void
netbsd32_sendsig_sigcontext(const ksiginfo_t *ksi, const sigset_t *mask)
{
int sig = ksi->ksi_signo;
struct lwp *l = curlwp;
struct proc *p = l->l_proc;
struct sparc32_sigframe *fp;
struct trapframe64 *tf;
int addr, onstack, error;
struct rwindow32 *oldsp, *newsp;
sig_t catcher = SIGACTION(p, sig).sa_handler;
struct sparc32_sigframe sf;
extern char netbsd32_sigcode[], netbsd32_esigcode[];
#define szsigcode (netbsd32_esigcode - netbsd32_sigcode)
tf = l->l_md.md_tf;
/* Need to attempt to zero extend this 32-bit pointer */
oldsp = (struct rwindow32 *)(u_long)(u_int)tf->tf_out[6];
/* Do we need to jump onto the signal stack? */
onstack =
(l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 &&
(SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0;
if (onstack) {
fp = (struct sparc32_sigframe *)((char *)l->l_sigstk.ss_sp +
l->l_sigstk.ss_size);
l->l_sigstk.ss_flags |= SS_ONSTACK;
} else
fp = (struct sparc32_sigframe *)oldsp;
fp = (struct sparc32_sigframe *)((u_long)(fp - 1) & ~7);
#ifdef DEBUG
sigpid = p->p_pid;
if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) {
printf("sendsig: %s[%d] sig %d newusp %p scp %p oldsp %p\n",
p->p_comm, p->p_pid, sig, fp, &fp->sf_sc, oldsp);
if (sigdebug & SDB_DDB) Debugger();
}
#endif
/*
* Now set up the signal frame. We build it in kernel space
* and then copy it out. We probably ought to just build it
* directly in user space....
*/
sf.sf_signo = sig;
sf.sf_code = (u_int)ksi->ksi_trap;
#if defined(COMPAT_SUNOS) || defined(MODULAR)
sf.sf_scp = (u_long)&fp->sf_sc;
#endif
sf.sf_addr = 0; /* XXX */
/*
* Build the signal context to be used by sigreturn.
*/
sf.sf_sc.sc_onstack = onstack;
sf.sf_sc.sc_mask = *mask;
sf.sf_sc.sc_sp = (u_long)oldsp;
sf.sf_sc.sc_pc = tf->tf_pc;
sf.sf_sc.sc_npc = tf->tf_npc;
sf.sf_sc.sc_psr = TSTATECCR_TO_PSR(tf->tf_tstate); /* XXX */
sf.sf_sc.sc_g1 = tf->tf_global[1];
sf.sf_sc.sc_o0 = tf->tf_out[0];
/*
* Put the stack in a consistent state before we whack away
* at it. Note that write_user_windows may just dump the
* registers into the pcb; we need them in the process's memory.
* We also need to make sure that when we start the signal handler,
* its %i6 (%fp), which is loaded from the newly allocated stack area,
* joins seamlessly with the frame it was in when the signal occurred,
* so that the debugger and _longjmp code can back up through it.
*/
sendsig_reset(l, sig);
mutex_exit(p->p_lock);
newsp = (struct rwindow32 *)((long)fp - sizeof(struct rwindow32));
write_user_windows();
#ifdef DEBUG
if ((sigdebug & SDB_KSTACK))
printf("sendsig: saving sf to %p, setting stack pointer %p to %p\n",
fp, &(((struct rwindow32 *)newsp)->rw_in[6]), oldsp);
#endif
error = (rwindow_save(l) ||
copyout((void *)&sf, (void *)fp, sizeof sf) ||
suword(&(((struct rwindow32 *)newsp)->rw_in[6]), (u_long)oldsp));
mutex_enter(p->p_lock);
if (error) {
/*
* Process has trashed its stack; give it an illegal
* instruction to halt it in its tracks.
*/
#ifdef DEBUG
mutex_exit(p->p_lock);
if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
printf("sendsig: window save or copyout error\n");
printf("sendsig: stack was trashed trying to send sig %d, sending SIGILL\n", sig);
if (sigdebug & SDB_DDB) Debugger();
mutex_enter(p->p_lock);
#endif
sigexit(l, SIGILL);
/* NOTREACHED */
}
#ifdef DEBUG
if (sigdebug & SDB_FOLLOW) {
printf("sendsig: %s[%d] sig %d scp %p\n",
p->p_comm, p->p_pid, sig, &fp->sf_sc);
}
#endif
/*
* Arrange to continue execution at the code copied out in exec().
* It needs the function to call in %g1, and a new stack pointer.
*/
addr = p->p_psstrp - szsigcode;
tf->tf_global[1] = (long)catcher;
tf->tf_pc = addr;
tf->tf_npc = addr + 4;
tf->tf_out[6] = (uint64_t)(u_int)(u_long)newsp;
/* Remember that we're now on the signal stack. */
if (onstack)
l->l_sigstk.ss_flags |= SS_ONSTACK;
#ifdef DEBUG
if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) {
mutex_exit(p->p_lock);
printf("sendsig: about to return to catcher %p thru %p\n",
catcher, addr);
if (sigdebug & SDB_DDB) Debugger();
mutex_enter(p->p_lock);
}
#endif
}
/*
* Copy strings out to the new process address space, constructing new arg
* and env vector tables. Return a pointer to the base so that it can be used
* as the initial stack pointer.
*/
static register_t *
linux_copyout_strings(struct image_params *imgp)
{
int argc, envc;
char **vectp;
char *stringp, *destp;
register_t *stack_base;
struct ps_strings *arginfo;
char canary[LINUX_AT_RANDOM_LEN];
size_t execpath_len;
struct proc *p;
/*
* Calculate string base and vector table pointers.
*/
if (imgp->execpath != NULL && imgp->auxargs != NULL)
execpath_len = strlen(imgp->execpath) + 1;
else
execpath_len = 0;
p = imgp->proc;
arginfo = (struct ps_strings *)p->p_sysent->sv_psstrings;
destp = (caddr_t)arginfo - SPARE_USRSPACE -
roundup(sizeof(canary), sizeof(char *)) -
roundup(execpath_len, sizeof(char *)) -
roundup(ARG_MAX - imgp->args->stringspace, sizeof(char *));
if (execpath_len != 0) {
imgp->execpathp = (uintptr_t)arginfo - execpath_len;
copyout(imgp->execpath, (void *)imgp->execpathp, execpath_len);
}
/*
* Prepare the canary for SSP.
*/
arc4rand(canary, sizeof(canary), 0);
imgp->canary = (uintptr_t)arginfo -
roundup(execpath_len, sizeof(char *)) -
roundup(sizeof(canary), sizeof(char *));
copyout(canary, (void *)imgp->canary, sizeof(canary));
/*
* If we have a valid auxargs ptr, prepare some room
* on the stack.
*/
if (imgp->auxargs) {
/*
* 'AT_COUNT*2' is size for the ELF Auxargs data. This is for
* lower compatibility.
*/
imgp->auxarg_size = (imgp->auxarg_size) ? imgp->auxarg_size :
(LINUX_AT_COUNT * 2);
/*
* The '+ 2' is for the null pointers at the end of each of
* the arg and env vector sets,and imgp->auxarg_size is room
* for argument of Runtime loader.
*/
vectp = (char **)(destp - (imgp->args->argc +
imgp->args->envc + 2 + imgp->auxarg_size) * sizeof(char *));
} else {
/*
* The '+ 2' is for the null pointers at the end of each of
* the arg and env vector sets
*/
vectp = (char **)(destp - (imgp->args->argc +
imgp->args->envc + 2) * sizeof(char *));
}
/*
* vectp also becomes our initial stack base
*/
stack_base = (register_t *)vectp;
stringp = imgp->args->begin_argv;
argc = imgp->args->argc;
envc = imgp->args->envc;
/*
* Copy out strings - arguments and environment.
*/
copyout(stringp, destp, ARG_MAX - imgp->args->stringspace);
/*
* Fill in "ps_strings" struct for ps, w, etc.
*/
suword(&arginfo->ps_argvstr, (long)(intptr_t)vectp);
suword(&arginfo->ps_nargvstr, argc);
/*
* Fill in argument portion of vector table.
*/
for (; argc > 0; --argc) {
suword(vectp++, (long)(intptr_t)destp);
while (*stringp++ != 0)
destp++;
destp++;
}
/* a null vector table pointer separates the argp's from the envp's */
suword(vectp++, 0);
suword(&arginfo->ps_envstr, (long)(intptr_t)vectp);
suword(&arginfo->ps_nenvstr, envc);
/*
* Fill in environment portion of vector table.
*/
for (; envc > 0; --envc) {
suword(vectp++, (long)(intptr_t)destp);
while (*stringp++ != 0)
destp++;
destp++;
}
/* end of vector table is a null pointer */
suword(vectp, 0);
return (stack_base);
}
static void
put_fs_long(u_long val, u_int32_t *adr)
{ (void)suword(adr,val); }
static int
ibcs2_fixup(register_t **stack_base, struct image_params *imgp)
{
return (suword(--(*stack_base), imgp->args->argc));
}
int
suword32(void *addr, int32_t word)
{
return (suword(addr, (long)word));
}
void sunos_sendsig(const ksiginfo_t *ksi, const sigset_t *mask)
{
struct lwp *l = curlwp;
struct proc *p = l->l_proc;
struct sunos_sigframe *fp;
struct trapframe *tf;
int addr, onstack, oldsp, newsp, error;
int sig = ksi->ksi_signo;
u_long code = ksi->ksi_code;
sig_t catcher = SIGACTION(p, sig).sa_handler;
struct sunos_sigframe sf;
tf = l->l_md.md_tf;
oldsp = tf->tf_out[6];
/*
* Compute new user stack addresses, subtract off
* one signal frame, and align.
*/
onstack =
(l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 &&
(SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0;
if (onstack)
fp = (struct sunos_sigframe *)
((char *)l->l_sigstk.ss_sp + l->l_sigstk.ss_size);
else
fp = (struct sunos_sigframe *)oldsp;
fp = (struct sunos_sigframe *)((int)(fp - 1) & ~7);
#ifdef DEBUG
if ((sunos_sigdebug & SDB_KSTACK) && p->p_pid == sunos_sigpid)
printf("sendsig: %s[%d] sig %d newusp %p scp %p\n",
p->p_comm, p->p_pid, sig, fp, &fp->sf_sc);
#endif
/*
* Now set up the signal frame. We build it in kernel space
* and then copy it out. We probably ought to just build it
* directly in user space....
*/
sf.sf_signo = sig;
sf.sf_code = code;
sf.sf_scp = &fp->sf_sc;
sf.sf_addr = 0; /* XXX */
/*
* Build the signal context to be used by sigreturn.
*/
sf.sf_sc.sc_onstack = l->l_sigstk.ss_flags & SS_ONSTACK;
native_sigset_to_sigset13(mask, &sf.sf_sc.sc_mask);
sf.sf_sc.sc_sp = oldsp;
sf.sf_sc.sc_pc = tf->tf_pc;
sf.sf_sc.sc_npc = tf->tf_npc;
sf.sf_sc.sc_psr = tf->tf_psr;
sf.sf_sc.sc_g1 = tf->tf_global[1];
sf.sf_sc.sc_o0 = tf->tf_out[0];
/*
* Put the stack in a consistent state before we whack away
* at it. Note that write_user_windows may just dump the
* registers into the pcb; we need them in the process's memory.
* We also need to make sure that when we start the signal handler,
* its %i6 (%fp), which is loaded from the newly allocated stack area,
* joins seamlessly with the frame it was in when the signal occurred,
* so that the debugger and _longjmp code can back up through it.
*/
sendsig_reset(l, sig);
mutex_exit(p->p_lock);
newsp = (int)fp - sizeof(struct rwindow);
write_user_windows();
error = (rwindow_save(l) || copyout((void *)&sf, (void *)fp, sizeof sf) ||
suword(&((struct rwindow *)newsp)->rw_in[6], oldsp));
mutex_enter(p->p_lock);
if (error) {
/*
* Process has trashed its stack; give it an illegal
* instruction to halt it in its tracks.
*/
#ifdef DEBUG
if ((sunos_sigdebug & SDB_KSTACK) && p->p_pid == sunos_sigpid)
printf("sendsig: window save or copyout error\n");
#endif
sigexit(l, SIGILL);
/* NOTREACHED */
}
#ifdef DEBUG
if (sunos_sigdebug & SDB_FOLLOW)
printf("sendsig: %s[%d] sig %d scp %p\n",
p->p_comm, p->p_pid, sig, &fp->sf_sc);
#endif
/*
* Arrange to continue execution at the code copied out in exec().
* It needs the function to call in %g1, and a new stack pointer.
*/
addr = (int)catcher; /* user does his own trampolining */
tf->tf_pc = addr;
tf->tf_npc = addr + 4;
tf->tf_out[6] = newsp;
/* Remember that we're now on the signal stack. */
if (onstack)
l->l_sigstk.ss_flags |= SS_ONSTACK;
#ifdef DEBUG
if ((sunos_sigdebug & SDB_KSTACK) && p->p_pid == sunos_sigpid)
printf("sendsig: about to return to catcher\n");
#endif
}
static void
put_fs_long(u_long val, unsigned long *adr)
{ (void)suword(adr,val); }
/*
* Code that the child process
* executes to implement the command
* of the parent process in tracing.
*/
procxmt()
{
register int i;
register *p;
register struct text *xp;
if (ipc.ip_lock != u.u_procp->p_pid)
return (0);
u.u_procp->p_slptime = 0;
i = ipc.ip_req;
ipc.ip_req = 0;
switch (i) {
case PT_READ_I: /* read the child's text space */
if (!useracc((caddr_t)ipc.ip_addr, 4, B_READ))
goto error;
ipc.ip_data = fuiword((caddr_t)ipc.ip_addr);
break;
case PT_READ_D: /* read the child's data space */
if (!useracc((caddr_t)ipc.ip_addr, 4, B_READ))
goto error;
ipc.ip_data = fuword((caddr_t)ipc.ip_addr);
break;
case PT_READ_U: /* read the child's u. */
i = (int)ipc.ip_addr;
if (i<0 || i >= ctob(UPAGES))
goto error;
ipc.ip_data = *(int *)PHYSOFF(&u, i);
break;
case PT_WRITE_I: /* write the child's text space */
/*
* If text, must assure exclusive use
*/
if (xp = u.u_procp->p_textp) {
if (xp->x_count!=1 || xp->x_iptr->i_mode&ISVTX)
goto error;
xp->x_flag |= XTRC;
}
i = -1;
if ((i = suiword((caddr_t)ipc.ip_addr, ipc.ip_data)) < 0) {
if (chgprot((caddr_t)ipc.ip_addr, RW) &&
chgprot((caddr_t)ipc.ip_addr+(sizeof(int)-1), RW))
i = suiword((caddr_t)ipc.ip_addr, ipc.ip_data);
(void) chgprot((caddr_t)ipc.ip_addr, RO);
(void) chgprot((caddr_t)ipc.ip_addr+(sizeof(int)-1), RO);
}
if (i < 0)
goto error;
if (xp)
xp->x_flag |= XWRIT;
break;
case PT_WRITE_D: /* write the child's data space */
if (suword((caddr_t)ipc.ip_addr, 0) < 0)
goto error;
(void) suword((caddr_t)ipc.ip_addr, ipc.ip_data);
break;
case PT_WRITE_U: /* write the child's u. */
i = (int)ipc.ip_addr;
p = (int *)PHYSOFF(&u, i);
for (i=0; i<NIPCREG; i++)
if (p == &u.u_ar0[ipcreg[i]])
goto ok;
if (p == &u.u_ar0[PS]) {
ipc.ip_data |= PSL_USERSET;
ipc.ip_data &= ~PSL_USERCLR;
goto ok;
}
goto error;
ok:
*p = ipc.ip_data;
break;
case PT_STEP: /* single step the child */
case PT_CONTINUE: /* continue the child */
if ((int)ipc.ip_addr != 1)
u.u_ar0[PC] = (int)ipc.ip_addr;
if ((unsigned)ipc.ip_data > NSIG)
goto error;
u.u_procp->p_cursig = ipc.ip_data; /* see issig */
if (i == PT_STEP)
u.u_ar0[PS] |= PSL_T;
wakeup((caddr_t)&ipc);
return (1);
case PT_KILL: /* kill the child process */
wakeup((caddr_t)&ipc);
exit(u.u_procp->p_cursig);
default:
error:
ipc.ip_req = -1;
}
wakeup((caddr_t)&ipc);
return (0);
}
