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android_development/ndk/sources/android/libportable/arch-mips/signal.c
Pete Delaney 79b607b432 [MIPS] Add Support signal. 
Change-Id: Ie2aa6cd24a119f96cd01c6b3d6352f011a0825b5
Signed-off-by: Pete Delaney  <piet@mips.com>
Signed-off-by: Chris Dearman <chris@mips.com>
2012-10-05 00:23:49 -07:00

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/*
* Copyright 2012, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdarg.h>
#include <stdlib.h>
#include <signal.h>
#include <signal_portable.h>
#include <portability.h>
#include <stdio.h>
#include <errno.h>
#include <errno_portable.h>
#define PORTABLE_TAG "signal_portable"
#include <log_portable.h>
#if SIGBUS_PORTABLE == SIGBUS
#error Bad build environment
#endif
/*
* The next five hidden functions are not exposed in the
* libportable shared object. They are used here and other
* functions, like waitpid(), which need to map signal numbers.
*/
__hidden char *map_portable_signum_to_name(int portable_signum)
{
char *name;
switch(portable_signum) {
case SIGHUP_PORTABLE: name = "SIGHUP_PORTABLE:1"; break;
case SIGINT_PORTABLE: name = "SIGINT_PORTABLE:2"; break;
case SIGQUIT_PORTABLE: name = "SIGQUIT_PORTABLE:3"; break;
case SIGILL_PORTABLE: name = "SIGILL_PORTABLE:4"; break;
case SIGTRAP_PORTABLE: name = "SIGTRAP_PORTABLE:5"; break;
case SIGABRT_PORTABLE: name = "SIGABRT_PORTABLE:6"; break;
case SIGBUS_PORTABLE: name = "SIGBUS_PORTABLE:7"; break;
case SIGFPE_PORTABLE: name = "SIGFPE_PORTABLE:8"; break;
case SIGKILL_PORTABLE: name = "SIGKILL_PORTABLE:9"; break;
case SIGUSR1_PORTABLE: name = "SIGUSR1_PORTABLE:10"; break;
case SIGSEGV_PORTABLE: name = "SIGSEGV_PORTABLE:11"; break;
case SIGUSR2_PORTABLE: name = "SIGUSR2_PORTABLE:12"; break;
case SIGPIPE_PORTABLE: name = "SIGPIPE_PORTABLE:13"; break;
case SIGALRM_PORTABLE: name = "SIGALRM_PORTABLE:14"; break;
case SIGTERM_PORTABLE: name = "SIGTERM_PORTABLE:15"; break;
case SIGSTKFLT_PORTABLE: name = "SIGSTKFLT_PORTABLE:16"; break;
case SIGCHLD_PORTABLE: name = "SIGCHLD_PORTABLE:17"; break;
case SIGCONT_PORTABLE: name = "SIGCONT_PORTABLE:18"; break;
case SIGSTOP_PORTABLE: name = "SIGSTOP_PORTABLE:19"; break;
case SIGTSTP_PORTABLE: name = "SIGTSTP_PORTABLE:20"; break;
case SIGTTIN_PORTABLE: name = "SIGTTIN_PORTABLE:21"; break;
case SIGTTOU_PORTABLE: name = "SIGTTOU_PORTABLE:22"; break;
case SIGURG_PORTABLE: name = "SIGURG_PORTABLE:23"; break;
case SIGXCPU_PORTABLE: name = "SIGXCPU_PORTABLE:24"; break;
case SIGXFSZ_PORTABLE: name = "SIGXFSZ_PORTABLE:25"; break;
case SIGVTALRM_PORTABLE: name = "SIGVTALRM_PORTABLE:26"; break;
case SIGPROF_PORTABLE: name = "SIGPROF_PORTABLE:27"; break;
case SIGWINCH_PORTABLE: name = "SIGWINCH_PORTABLE:28"; break;
case SIGIO_PORTABLE: name = "SIGIO_PORTABLE:29"; break;
case SIGPWR_PORTABLE: name = "SIGPWR_PORTABLE:30"; break;
case SIGSYS_PORTABLE: name = "SIGSYS_PORTABLE:31"; break;
case SIGRTMIN_PORTABLE: name = "SIGRTMIN_PORTABLE:32"; break;
default: name = "<<UNKNOWN>>"; break;
}
return name;
}
__hidden char *map_mips_signum_to_name(int mips_signum)
{
char *name;
switch(mips_signum) {
case SIGHUP: name = "SIGHUP:1"; break;
case SIGINT: name = "SIGINT:2"; break;
case SIGQUIT: name = "SIGQUIT:3"; break;
case SIGILL: name = "SIGILL:4"; break;
case SIGTRAP: name = "SIGTRAP:5"; break;
case SIGIOT: name = "SIGIOT:6"; break;
case SIGEMT: name = "SIGEMT:7"; break;
case SIGFPE: name = "SIGFPE:8"; break;
case SIGKILL: name = "SIGKILL:9"; break;
case SIGBUS: name = "SIGBUS:10"; break;
case SIGSEGV: name = "SIGSEGV:11"; break;
case SIGSYS: name = "SIGSYS:12"; break;
case SIGPIPE: name = "SIGPIPE:13"; break;
case SIGALRM: name = "SIGALRM:14"; break;
case SIGTERM: name = "SIGTERM:15"; break;
case SIGUSR1: name = "SIGUSR1:16"; break;
case SIGUSR2: name = "SIGUSR2:17"; break;
case SIGCHLD: name = "SIGCHLD:18"; break;
case SIGPWR: name = "SIGPWR:19"; break;
case SIGWINCH: name = "SIGWINCH:20"; break;
case SIGURG: name = "SIGURG:21"; break;
case SIGIO: name = "SIGIO:22"; break;
case SIGSTOP: name = "SIGSTOP:23"; break;
case SIGTSTP: name = "SIGTSTP:24"; break;
case SIGCONT: name = "SIGCONT:25"; break;
case SIGTTIN: name = "SIGTTIN:26"; break;
case SIGTTOU: name = "SIGTTOU:27"; break;
case SIGVTALRM: name = "SIGVTALRM:28"; break;
case SIGPROF: name = "SIGPROF:29"; break;
case SIGXCPU: name = "SIGXCPU:30"; break;
case SIGXFSZ: name = "SIGXFSZ:31"; break;
case SIGRTMIN: name = "SIGRTMIN:32"; break;
default: name = "<<UNKNOWN>>"; break;
}
return name;
}
__hidden int map_portable_signum_to_mips(int portable_signum)
{
int mips_signum = -1;
switch(portable_signum) {
case SIGHUP_PORTABLE: /* 1 */
return SIGHUP;
case SIGINT_PORTABLE: /* 2 */
return SIGINT;
case SIGQUIT_PORTABLE: /* 3 */
return SIGQUIT;
case SIGILL_PORTABLE: /* 4 */
return SIGILL;
case SIGTRAP_PORTABLE: /* 5 */
return SIGTRAP;
case SIGABRT_PORTABLE: /* 6 */
return SIGABRT;
case SIGBUS_PORTABLE: /* 7 --> 10 */
return SIGBUS;
case SIGFPE_PORTABLE: /* 8 */
return SIGFPE;
case SIGKILL_PORTABLE: /* 9 */
return SIGKILL;
case SIGUSR1_PORTABLE: /* 10 --> 16 */
return SIGUSR1;
case SIGSEGV_PORTABLE: /* 11 */
return SIGSEGV;
case SIGUSR2_PORTABLE: /* 12 --> 17 */
return SIGUSR2;
case SIGPIPE_PORTABLE: /* 13 */
return SIGPIPE;
case SIGALRM_PORTABLE: /* 14 */
return SIGALRM;
case SIGTERM_PORTABLE: /* 15 */
return SIGTERM;
case SIGSTKFLT_PORTABLE: /* 16 --> VOID:0 */
/* No MIPS SIGSTKFLT Exits; try mapping it to zero */
return(0);
case SIGCHLD_PORTABLE: /* 17 --> 18 */
return SIGCHLD;
case SIGCONT_PORTABLE:
return SIGCONT; /* 18 --> 25 */
case SIGSTOP_PORTABLE: /* 19 --> 23 */
return SIGSTOP;
case SIGTSTP_PORTABLE: /* 20 --> 24 */
return SIGTSTP;
case SIGTTIN_PORTABLE: /* 21 --> 26 */
return SIGTTIN;
case SIGTTOU_PORTABLE: /* 22 --> 27 */
return SIGTTOU;
case SIGURG_PORTABLE: /* 23 --> 21 */
return SIGURG;
case SIGXCPU_PORTABLE: /* 24 --> 30 */
return SIGXCPU;
case SIGXFSZ_PORTABLE: /* 25 --> 31 */
return SIGXFSZ;
case SIGVTALRM_PORTABLE: /* 26 --> 28 */
return SIGVTALRM;
case SIGPROF_PORTABLE: /* 27 --> 29 */
return SIGPROF;
case SIGWINCH_PORTABLE: /* 28 --> 20 */
return SIGWINCH;
case SIGIO_PORTABLE: /* 29 --> 22 */
return SIGIO;
case SIGPWR_PORTABLE: /* 30 --> 19 */
return SIGPWR;
case SIGSYS_PORTABLE: /* 31 --> 12 */
return SIGSYS;
case SIGRTMIN_PORTABLE: /* 32 */
return SIGRTMIN;
default:
ALOGE("%s: switch default: NOTE portable_signum:%d not supported.", __func__,
portable_signum);
/*
* User could be LTP testing with bogus signal numbers,
* if so we mimic the test.
*
* If the signal is just outside the PORTABLE range
* we use a signal just outside the MIPS range.
*/
if (portable_signum < 0) {
mips_signum = portable_signum;
} else if (portable_signum > NSIG_PORTABLE) {
mips_signum = (portable_signum - NSIG_PORTABLE) + NSIG;
} else {
ALOGE("%s: 0 <= portable_signum:%d <= NSIG_PORTABLE:%d; not supported, Return(0);", __func__,
portable_signum, NSIG_PORTABLE);
mips_signum = 0;
}
break;
}
ALOGV("%s(portable_signum:%d): return(mips_signum:%d);", __func__,
portable_signum, mips_signum);
return mips_signum;
}
__hidden int map_mips_signum_to_portable(int mips_signum)
{
int portable_ssignum = -1;
switch(mips_signum) {
case SIGHUP: /* 1 */
return SIGHUP_PORTABLE;
case SIGINT: /* 2 */
return SIGINT_PORTABLE;
case SIGQUIT: /* 3 */
return SIGQUIT_PORTABLE;
case SIGILL: /* 4 */
return SIGILL_PORTABLE;
case SIGTRAP: /* 5 */
return SIGTRAP_PORTABLE;
case SIGABRT: /* 6 */
return SIGABRT_PORTABLE;
case SIGBUS: /* 7 <-- 10 */
return SIGBUS_PORTABLE;
case SIGFPE: /* 8 */
return SIGFPE_PORTABLE;
case SIGKILL: /* 9 */
return SIGKILL_PORTABLE;
case SIGUSR1: /* 10 <-- 16 */
return SIGUSR1_PORTABLE;
case SIGSEGV: /* 11 */
return SIGSEGV_PORTABLE;
case SIGUSR2: /* 12 <-- 17 */
return SIGUSR2_PORTABLE;
case SIGPIPE: /* 13 */
return SIGPIPE_PORTABLE;
case SIGALRM: /* 14 */
return SIGALRM_PORTABLE;
case SIGTERM_PORTABLE: /* 15 */
return SIGTERM;
#if defined(SIGSTKFLT)
case SIGSTKFLT: /* 16 <--- VOID; NOT SUPPORTED */
ASSERT(mips_signum != SIGSTKFLT_PORTABLE);
return(-1);
#endif
case SIGCHLD: /* 17 <-- 18 */
return SIGCHLD_PORTABLE;
case SIGCONT: /* 18 <-- 15 */
return SIGCONT_PORTABLE;
case SIGSTOP: /* 19 <-- 23 */
return SIGSTOP_PORTABLE;
case SIGTSTP: /* 20 <-- 24 */
return SIGTSTP_PORTABLE;
case SIGTTIN: /* 21 <-- 26 */
return SIGTTIN_PORTABLE;
case SIGTTOU: /* 22 <-- 27 */
return SIGTTOU_PORTABLE;
case SIGURG: /* 23 <-- 21 */
return SIGURG_PORTABLE;
case SIGXCPU: /* 24 <-- 30 */
return SIGXCPU_PORTABLE;
case SIGXFSZ: /* 25 <-- 31 */
return SIGXFSZ_PORTABLE;
case SIGVTALRM: /* 26 <-- 28 */
return SIGVTALRM_PORTABLE;
case SIGPROF: /* 27 <-- 29 */
return SIGPROF_PORTABLE;
case SIGWINCH: /* 28 <-- 20 */
return SIGWINCH_PORTABLE;
case SIGIO: /* 29 <-- 22 */
return SIGIO_PORTABLE;
case SIGPWR: /* 30 <-- 19 */
return SIGPWR_PORTABLE;
case SIGSYS: /* 31 <-- 12 */
return SIGSYS_PORTABLE;
case SIGRTMIN_PORTABLE: /* 32 */
return SIGRTMIN;
default:
ALOGE("%s: switch default: mips_signum:%d not supported! return(0);", __func__, mips_signum);
#if 0
LOG_FATAL("%s: mips_signum:%d is not portable;", __func__, mips_signum);
#endif
return(0);
}
return portable_ssignum;
}
/*
* Array of signal handlers as the portable users expects they
* they have been registered in the kernel. Problem is we need
* to have our own handler to map the MIPS signal number to a
* portable signal number.
*/
sig3handler_portable_t mips_portable_sighandler[NSIG_PORTABLE] = { NULL };
static void mips_sigaction_handler(int mips_signum, siginfo_t *sip, void *ucp)
{
int portable_signum;
char *portable_signame;
char *mips_signame = map_mips_signum_to_name(mips_signum);
sig3handler_portable_t portable_sighandler;
siginfo_portable_t portable_si;
siginfo_portable_t *portable_sip;
ALOGV("%s(mips_signum:%d:'%s', sip:%p, ucp:%p) {", __func__,
mips_signum,
mips_signame, sip, ucp);
portable_signum = map_mips_signum_to_portable(mips_signum);
portable_signame = map_portable_signum_to_name(portable_signum);
portable_sighandler = mips_portable_sighandler[portable_signum];
ASSERT(portable_sighandler != NULL);
ASSERT(portable_sighandler != (sig3handler_portable_t) SIG_DFL);
ASSERT(portable_sighandler != (sig3handler_portable_t) SIG_IGN);
ASSERT(portable_sighandler != (sig3handler_portable_t) SIG_ERR);
if (sip == NULL) {
portable_sip = NULL;
} else {
int portable_si_errno;
int portable_si_signo;
char *mips_si_signame;
char *portable_si_signame;
/*
* Map Structure members from MIPS to Portable.
*/
portable_si_signo = map_mips_signum_to_portable(sip->si_signo);
portable_si_signame = map_portable_signum_to_name(portable_si_signo);
portable_si_errno = ntop_errno(sip->si_errno);
mips_si_signame = map_mips_signum_to_name(sip->si_signo);
/*
* Deal with siginfo structure being a bit different.
*/
ASSERT(sizeof(siginfo_portable_t) == sizeof(siginfo_t));
memcpy(&portable_si, sip, sizeof(portable_si)); /* Default to the same structure members */
portable_si.si_signo = portable_si_signo;
portable_si.si_code = sip->si_code; /* code and errno are swapped between ARM and MIPS ... */
portable_si.si_errno = portable_si_errno; /* ... and errno needs to be translated. */
portable_sip = &portable_si;
} /* if sip */
portable_sighandler(portable_signum, portable_sip, ucp);
ALOGV("%s: return; }", __func__);
}
static void mips_sighandler(int mips_signum)
{
int portable_signum;
char *portable_signame;
char *mips_signame = map_mips_signum_to_name(mips_signum);
sig3handler_portable_t portable_sighandler;
ALOGV("%s(mips_signum:%d:'%s') {", __func__, mips_signum, mips_signame);
mips_sigaction_handler(mips_signum, NULL, NULL);
ALOGV("%s: return; }", __func__);
}
static sighandler_t map_portable_sighandler_to_mips(sighandler_portable_t portable_handler, int sigaction)
{
sighandler_t mips_handler;
ALOGV("%s(portable_handler:%p, sigaction:%d) {", __func__,
portable_handler, sigaction);
switch((int) portable_handler) {
case (int) SIG_DFL:
case (int) SIG_IGN:
case (int) SIG_ERR:
mips_handler = portable_handler;
break;
default:
if (sigaction)
mips_handler = (sighandler_t) mips_sighandler;
else
mips_handler = (sighandler_t) mips_sigaction_handler;
break;
}
ALOGV("%s: return(mips_handler:%p); }", __func__, mips_handler);
return(mips_handler);
}
/*
* This function maps the signal number and calls one of the low level mips signal()
* functions implemented in portable-jb/bionic/libc/unistd/signal.c:
* sysv_signal()
* bsd_signal()
*
* The last 2 parameters to this static function, mips_signal_fn*, specify which of these functions to call.
* We intercept the above to functions, as well as signal(), and call the associated *_portable()
* functions below.
*
* In addition, we intercept the signal_handler with our own handlers that map the signal number from
* the MIPS convention to the PORTABLE/ARM convention.
*/
static sighandler_portable_t _signal_portable(int portable_signum, sighandler_portable_t portable_handler,
__sighandler_t (mips_signal_fn)(int, __sighandler_t), char *mips_signal_fn_name)
{
char *portable_signame = map_portable_signum_to_name(portable_signum);
int mips_signum;
sighandler_t mips_handler;
sighandler_portable_t ret;
sighandler_portable_t prev_portable_handler;
ALOGV("%s(portable_signum:%d:%s, portable_handler:%p, mips_signal_fn:%p, mips_signal_fn_name:'%s') {", __func__,
portable_signum, portable_signame,
portable_handler, mips_signal_fn, mips_signal_fn_name);
mips_signum = map_portable_signum_to_mips(portable_signum);
if ((portable_signum != 0) && ((mips_signum <= 0) || (mips_signum > NSIG))) {
/*
* Invalid request; Let the kernel generate the proper return value and set errno.
*/
mips_handler = map_portable_sighandler_to_mips(portable_handler, 0);
ret = mips_signal_fn(mips_signum, mips_handler);
} else {
/*
* We have a usable signal number, redirect it to our signal handler
* if a portable handler was provided so we can convert the signal number.
* Save our current mapped signal handler for likely return.
*/
prev_portable_handler = (sighandler_portable_t) mips_portable_sighandler[portable_signum];
mips_handler = map_portable_sighandler_to_mips(portable_handler, 0);
if (mips_handler != portable_handler) {
mips_portable_sighandler[portable_signum] = (sig3handler_portable_t) portable_handler;
}
ret = mips_signal_fn(mips_signum, mips_handler);
if ((ret == (sighandler_portable_t) mips_sighandler) ||
(ret == (sighandler_portable_t) mips_sigaction_handler)) {
ret = (sighandler_t) prev_portable_handler;
}
}
ALOGV("%s: return(ret:%p); }", __func__, ret);
return(ret);
}
/*
* signal() can't be called directly, due to an in-line function in signal.h which
* redirects the call to bsd_signal(). _signal() is a static function; not to be called
* directly. This function isn't actually needed.
*/
sighandler_portable_t signal_portable(int portable_signum, sighandler_portable_t handler)
{
sighandler_portable_t ret;
ALOGV(" ");
ALOGV("%s(portable_signum:%d, handler:%p);", __func__,
portable_signum, handler);
/* bsd does a SA_RESTART */
ret = _signal_portable(portable_signum, handler, bsd_signal, "bsd_signal");
ALOGV("%s: return(ret:%p); }", __func__, ret);
return(ret);
}
sighandler_portable_t sysv_signal_portable(int portable_signum, sighandler_portable_t handler)
{
sighandler_portable_t ret;
ALOGV(" ");
ALOGV("%s(portable_signum:%d, handler:%p);", __func__,
portable_signum, handler);
/* sysv does a SA_RESETHAND */
ret = _signal_portable(portable_signum, handler, sysv_signal, "sysv_signal");
ALOGV("%s: return(ret:%p); }", __func__, ret);
return(ret);
}
sighandler_portable_t bsd_signal_portable(int portable_signum, sighandler_portable_t handler)
{
sighandler_portable_t ret;
ALOGV(" ");
ALOGV("%s(portable_signum:%d, handler:%p) {", __func__,
portable_signum, handler);
/* bsd does a SA_RESTART */
ret = _signal_portable(portable_signum, handler, bsd_signal, "bsd_signal");
ALOGV("%s: return(ret:%p); }", __func__, ret);
return(ret);
}
static int kill_helper(int id, int portable_signum, int (*fn)(int, int), const char *name)
{
char *portable_signame = map_portable_signum_to_name(portable_signum);
int mips_signum;
int ret;
ALOGV("%s(id:%d, portable_signum:%d:'%s');", name,
id, portable_signum, portable_signame);
mips_signum = map_portable_signum_to_mips(portable_signum);
if ((portable_signum != 0) && (mips_signum == 0))
return 0;
return fn(id, mips_signum);
}
int killpg_portable(int pgrp, int portable_signum)
{
return kill_helper(pgrp, portable_signum, killpg, __func__);
}
int kill_portable(pid_t pid, int portable_signum)
{
return kill_helper(pid, portable_signum, kill, __func__);
}
int tkill_portable(int tid, int portable_signum)
{
extern int tkill(int, int);
return kill_helper(tid, portable_signum, tkill, __func__);
}
/* tgkill is not exported from android-14 libc.so */
#if 0
int tgkill_portable(int tgid, int tid, int portable_signum)
{
extern int tgkill(int, int, int);
char *portable_signame = map_portable_signum_to_name(portable_signum);
int mips_signum;
int rv;
ALOGV("%s(tgid:%d, tid:%d, portable_signum:%d:'%s');", __func__,
tgid, tid, portable_signum, portable_signame);
mips_signum = map_portable_signum_to_mips(portable_signum);
if ((portable_signum != 0) && (mips_signum == 0))
rv = 0;
else
rv = tgkill(tgid, tid, mips_signum);
ALOGV("%s: return rv:%d;", __func__, rv);
return rv;
}
#endif
int raise_portable(int portable_signum)
{
char *portable_signame = map_portable_signum_to_name(portable_signum);
int mips_signum = map_portable_signum_to_mips(portable_signum);
int rv;
ALOGV("%s(portable_signum:%d:'%s') {", __func__, portable_signum, portable_signame);
if ((portable_signum != 0) && (mips_signum == 0))
rv = 0;
else
rv = raise(mips_signum);
ALOGV("%s: return(rv:%d); }", __func__, rv);
return(rv);
}
void map_portable_sigset_to_mips(sigset_portable_t *portable_sigset, sigset_t *mips_sigset)
{
int portable_signum;
ASSERT(mips_sigset != NULL);
ALOGV("%s(portable_sigset:%p, mips_sigset:%p) {", __func__,
portable_sigset, mips_sigset);
sigemptyset(mips_sigset);
if (invalid_pointer((void *)portable_sigset)) {
ALOGE("%s: portable_sigset:%p is not valid; returning empty set.", __func__,
portable_sigset);
goto done;
}
for(portable_signum = 1; portable_signum <= NSIG_PORTABLE; portable_signum++) {
if (sigismember_portable(portable_sigset, portable_signum)) {
char *portable_signame = map_portable_signum_to_name(portable_signum);
int mips_signum = map_portable_signum_to_mips(portable_signum);
char *mips_signame;
if (mips_signum != 0) {
int err;
mips_signame = map_mips_signum_to_name(mips_signum);
ALOGV("%s: sigaddset(mips_sigset:%p, mips_signum:%d:'%s'); [portable_signum:%d:'%s']", __func__,
mips_sigset, mips_signum,
mips_signame, portable_signum,
portable_signame);
err = sigaddset(mips_sigset, mips_signum);
if (err == -1) {
PERROR("sigaddset");
}
}
}
}
done:
ALOGV("%s: return; }", __func__);
return;
}
void map_mips_sigset_to_portable(const sigset_t *const_mips_sigset, sigset_portable_t *portable_sigset)
{
int mips_signum;
sigset_t *mips_sigset = (sigset_t *) const_mips_sigset;
ALOGV("%s(const_mips_sigset:%p, portable_sigset:%p) {", __func__,
const_mips_sigset, portable_sigset);
ASSERT(mips_sigset != NULL);
if (invalid_pointer((void *)portable_sigset)) {
ALOGE("%s: portable_sigset:%p is not Valid; can't return sigset", __func__,
portable_sigset);
goto done;
}
sigemptyset_portable(portable_sigset);
for(mips_signum = 1; mips_signum <= NSIG; mips_signum++) {
if (sigismember(mips_sigset, mips_signum)) {
int portable_signum = map_mips_signum_to_portable(mips_signum);
if (portable_signum != 0)
sigaddset_portable(portable_sigset, portable_signum);
}
}
done:
ALOGV("%s: return; }", __func__);
return;
}
static int map_portable_sigaction_flags_to_mips(int portable_flags)
{
int mips_flags = 0;
if (portable_flags & SA_NOCLDSTOP_PORTABLE)
mips_flags |= SA_NOCLDSTOP;
if (portable_flags & SA_NOCLDWAIT_PORTABLE)
mips_flags |= SA_NOCLDWAIT;
if (portable_flags & SA_SIGINFO_PORTABLE)
mips_flags |= SA_SIGINFO;
if (portable_flags & SA_THIRTYTWO_PORTABLE) {
ALOGV("%s: SA_THIRTYTWO_PORTABLE isn't SUPPORTED.", __func__);
}
if (portable_flags & SA_RESTORER_PORTABLE)
mips_flags |= SA_RESTORER;
if (portable_flags & SA_ONSTACK_PORTABLE)
mips_flags |= SA_ONSTACK;
if (portable_flags & SA_RESTART_PORTABLE)
mips_flags |= SA_RESTART;
if (portable_flags & SA_NODEFER_PORTABLE)
mips_flags |= SA_NODEFER;
if (portable_flags & SA_RESETHAND_PORTABLE)
mips_flags |= SA_RESETHAND;
ALOGV("%s(portable_flags:0x%x) return(mips_flags:0x%x);", __func__,
portable_flags, mips_flags);
return(mips_flags);
}
int map_mips_sigaction_flags_to_portable(int mips_flags)
{
int portable_flags = 0;
if (mips_flags & SA_NOCLDSTOP) portable_flags |= SA_NOCLDSTOP_PORTABLE;
if (mips_flags & SA_NOCLDWAIT) portable_flags |= SA_NOCLDWAIT_PORTABLE;
if (mips_flags & SA_SIGINFO) portable_flags |= SA_SIGINFO_PORTABLE;
#ifdef SA_THIRTYTWO
if (mips_flags & SA_THIRTYTWO) portable_flags |= SA_THIRTYTWO_PORTABLE;
#endif
if (mips_flags & SA_RESTORER) portable_flags |= SA_RESTORER_PORTABLE;
if (mips_flags & SA_ONSTACK) portable_flags |= SA_ONSTACK_PORTABLE;
if (mips_flags & SA_RESTART) portable_flags |= SA_RESTART_PORTABLE;
if (mips_flags & SA_NODEFER) portable_flags |= SA_NODEFER_PORTABLE;
if (mips_flags & SA_RESETHAND) portable_flags |= SA_RESETHAND_PORTABLE;
ALOGV("%s(mips_flags:0x%x) return(portable_flags:0x%x);", __func__,
mips_flags, portable_flags);
return(portable_flags);
}
/*
* Called by portable/ARM code, which we map and do MIPS system calls.
*
* The incoming system call used a Portable/ARM sigaction structure:
* ------------------------------------------------------------------
* struct sigaction_portable {
* union {
* __sighandler_portable_t _sa_handler;
* __sigaction_handler_portable_t _sa_sigaction;
* } _u;
* sigset_portable_t sa_mask;
* unsigned long sa_flags;
* void (*sa_restorer)(void);
* };
*
* A similar, but different, structure is used in the MIPS/Native system call:
* ---------------------------------------------------------------------------
* struct sigaction {
* unsigned int sa_flags;
* union {
* __sighandler_t sa_handler;
* __sigaction_handler_portable_t _sa_sigaction;
* } __u;
* sigset_t sa_mask;
* };
*
* This sigaction structure needs to be mapped before the MIPS systems call as well as after for
* returning the old/previous sigaction. Also, like signal_portable() above, we need to maintain
* a table of signal handlers that our intercepting handler can call after it converts the signal
* numbers.
*/
int sigaction_portable(int portable_signum, const struct sigaction_portable *act, struct sigaction_portable *oldact)
{
int mips_signum;
char *mips_signame;
struct sigaction mips_act;
struct sigaction mips_oldact;
sighandler_t mips_handler;
sighandler_portable_t portable_handler;
sig3handler_portable_t prev_portable_handler;
char *portable_signame = map_portable_signum_to_name(portable_signum);
int rv;
ALOGV(" ");
ALOGV("%s(portable_signum:%d:'%s', act:%p, oldact:%p) {", __func__,
portable_signum,
portable_signame, act, oldact);
mips_signum = map_portable_signum_to_mips(portable_signum);
mips_signame = map_mips_signum_to_name(mips_signum);
if ((portable_signum != 0) && (mips_signum == 0)) {
/* We got a portable signum that we can't map; Ignore the request */
rv = 0;
goto done;
}
if (portable_signum >= 0 && portable_signum < NSIG_PORTABLE)
prev_portable_handler = mips_portable_sighandler[portable_signum];
else
prev_portable_handler = NULL;
memset(&mips_act, 0, sizeof(mips_act));
if (invalid_pointer((void *)act)) {
rv = sigaction(mips_signum, (struct sigaction *)act, &mips_oldact);
} else {
/*
* Make the MIPS version of sigaction, which has no sa_restorer function pointer. Also the handler
* will be called with a pointer to a to a sigcontext structure which is totally non-portable.
*/
map_portable_sigset_to_mips(((sigset_portable_t *)&act->sa_mask), ((sigset_t *) &mips_act.sa_mask));
mips_act.sa_flags = map_portable_sigaction_flags_to_mips(act->sa_flags);
if (mips_act.sa_flags & SA_SIGINFO) {
/*
* Providing the three argument version of a signal handler.
*/
if (portable_signum >= 0 && portable_signum < NSIG_PORTABLE) {
mips_portable_sighandler[portable_signum] = (sig3handler_portable_t) act->sa_sigaction_portable;
mips_act.sa_sigaction = mips_sigaction_handler;
}
else {
mips_act.sa_sigaction = act->sa_sigaction_portable;
}
} else {
/*
* Providing the classic single argument version of a signal handler.
*/
portable_handler = act->sa_handler_portable;
if ((portable_signum < 0) || (portable_signum > NSIG_PORTABLE)) {
/*
* Let the kernel generate the proper return value and set errno.
*/
mips_act.sa_handler = (sighandler_t) portable_handler;
} else {
mips_handler = map_portable_sighandler_to_mips(portable_handler, 1);
if (mips_handler != portable_handler) {
mips_portable_sighandler[portable_signum] = (sig3handler_portable_t) portable_handler;
}
mips_act.sa_handler = mips_handler;
}
}
rv = sigaction(mips_signum, &mips_act, &mips_oldact);
}
if (oldact) {
if ((mips_oldact.sa_sigaction == (__sigaction_handler_portable_t) mips_sighandler) ||
(mips_oldact.sa_sigaction == (__sigaction_handler_portable_t) mips_sigaction_handler)) {
oldact->sa_sigaction_portable = (__sigaction_handler_portable_t) prev_portable_handler;
} else {
oldact->sa_sigaction_portable = (__sigaction_handler_portable_t) mips_oldact.sa_sigaction;
}
map_mips_sigset_to_portable((sigset_t *) &(mips_oldact.sa_mask), (sigset_portable_t *) &(oldact->sa_mask));
oldact->sa_flags = map_mips_sigaction_flags_to_portable(mips_oldact.sa_flags);
oldact->sa_restorer = NULL;
}
done:
ALOGV("%s: return(rv:%d); }", __func__, rv);
return(rv);
}
#if 0
/*
* So far it appears that signalfd() isn't supported by bionic
* the kernel trap numbers are available.
*/
int signalfd_portable(int fd, const sigset_t *portable_sigmask, int flags)
{
sigset_t mips_sigmask;
map_portable_sigset_to_mips(portable_sigmask, &mips_sigmask);
return signalfd(fd, &mips_sigmask, flags);
}
#endif
int sigsuspend_portable(const sigset_portable_t *portable_sigmask)
{
int rv;
sigset_t mips_sigmask;
ALOGV("%s(portable_sigmask:%p) {", __func__, portable_sigmask);
if (invalid_pointer((void *)portable_sigmask)) {
errno = EFAULT;
rv = -1;
} else {
map_portable_sigset_to_mips((sigset_portable_t *)portable_sigmask, &mips_sigmask);
rv = sigsuspend(&mips_sigmask);
}
ALOGV("%s: return(rv:%d);", __func__, rv);
return(rv);
}
int sigpending_portable(sigset_portable_t *portable_sigset)
{
int rv;
sigset_t mips_sigset;
ALOGV("%s(portable_sigset:%p) {", __func__,
portable_sigset);
if (invalid_pointer((void *)portable_sigset)) {
errno = EFAULT;
rv = -1;
} else {
rv = sigpending(&mips_sigset);
map_mips_sigset_to_portable(&mips_sigset, portable_sigset);
}
ALOGV("%s: return(rv:%d);", __func__, rv);
return(rv);
}
int sigwait_portable(const sigset_portable_t *portable_sigset, int *ptr_to_portable_sig)
{
int rv;
sigset_t mips_sigset;
int mips_sig;
int portable_sig;
ALOGV("%s(portable_sigset:%p, ptr_to_portable_sig:%p) {", __func__,
portable_sigset, ptr_to_portable_sig);
if (invalid_pointer((void *)portable_sigset)) {
errno = EFAULT;
rv = -1;
} else {
map_portable_sigset_to_mips((sigset_portable_t *)portable_sigset, &mips_sigset);
rv = sigwait(&mips_sigset, &mips_sig);
portable_sig = map_mips_signum_to_portable(mips_sig);
*ptr_to_portable_sig = portable_sig;
}
ALOGV("%s: return(rv:%d);", __func__, rv);
return(rv);
}
int siginterrupt_portable(int portable_signum, int flag)
{
int rv;
int mips_signum;
ALOGV("%s(portable_signum:%d, flag:0x%x) {", __func__,
portable_signum, flag);
mips_signum = map_portable_signum_to_mips(portable_signum);
if ((portable_signum != 0) && (mips_signum == 0)) {
ALOGE("%s: Unsupported portable_signum:%d; Ignoring.", __func__,
portable_signum);
rv = 0;
} else {
rv = siginterrupt(mips_signum, flag);
}
ALOGV("%s: return(rv:%d);", __func__, rv);
return(rv);
}
__hidden int sigmask_helper(int portable_how, const sigset_portable_t *portable_sigset, sigset_portable_t *portable_oldset, sigmask_fn fn, char *fname)
{
int rv;
int how;
char *how_name;
sigset_t mips_sigset, *mips_sigset_p;
sigset_t mips_oldset, *mips_oldset_p;
ALOGV(" ");
ALOGV("%s(portable_how:%d, portable_sigset:%p, portable_oldset:%p) {", __func__,
portable_how, portable_sigset, portable_oldset);
switch(portable_how) {
case SIG_BLOCK_PORTABLE: how = SIG_BLOCK; how_name = "SIG_BLOCK"; break;
case SIG_UNBLOCK_PORTABLE: how = SIG_UNBLOCK; how_name = "SIG_UNBLOCK"; break;
case SIG_SETMASK_PORTABLE: how = SIG_SETMASK; how_name = "SIG_SETMASK"; break;
default:
ALOGE("%s: portable_how:%d NOT SUPPORTED!", __func__, portable_how);
how = -1;
break;
}
if (invalid_pointer((void *)portable_sigset)) {
mips_sigset_p = (sigset_t *) portable_sigset;
} else {
mips_sigset_p = &mips_sigset;
memset(mips_sigset_p, 0, sizeof(mips_sigset));
sigemptyset(mips_sigset_p);
map_portable_sigset_to_mips((sigset_portable_t *)portable_sigset, &mips_sigset);
}
if (invalid_pointer((void *)portable_oldset)) {
mips_oldset_p = (sigset_t *) portable_oldset;
} else {
mips_oldset_p = &mips_oldset;
memset(mips_oldset_p, 0, sizeof(mips_oldset));
sigemptyset(mips_oldset_p);
}
rv = fn(how, mips_sigset_p, mips_oldset_p);
if (rv == 0 && !invalid_pointer(portable_oldset)) {
/* Map returned mips_oldset to portable_oldset for return to caller */
map_mips_sigset_to_portable(mips_oldset_p, portable_oldset);
}
ALOGV("%s: return(rv:%d); }", __func__, rv);
return(rv);
}
int sigprocmask_portable(int portable_how,
const sigset_portable_t *portable_sigset,
sigset_portable_t *portable_oldset)
{
return sigmask_helper(portable_how, portable_sigset, portable_oldset, sigprocmask, "sigprocmask");
}
/*
* ss_flags and ss_size are located in different locations in stack_t structure:
*
* Incomming ARM/Portable stack_t: Outgoing MIPS stack_t:
* ------------------------------- ----------------------------
* typedef struct sigaltstack { typedef struct sigaltstack {
* void __user *ss_sp; void *ss_sp;
* int ss_flags; size_t ss_size;
* size_t ss_size; int ss_flags;
* } stack_t;
*
*/
int sigaltstack_portable(const portable_stack_t *ss, portable_stack_t *oss)
{
int rv;
stack_t new_stack, *mips_ss;
stack_t old_stack, *mips_oss;
ALOGV(" ");
ALOGV("%s(ss:%p, oss:%p) {", __func__, ss, oss);
if (ss == NULL) {
mips_ss = NULL;
} else {
if (invalid_pointer((void *)ss)) {
ALOGE("%s: invalid_pointer(ss:%p): Let kernel set proper errno and set return value.", __func__,
ss);
mips_ss = (stack_t *) ss;
} else {
memset(&new_stack, 0, sizeof(stack_t));
new_stack.ss_sp = ss->ss_sp;
new_stack.ss_flags = ss->ss_flags;
new_stack.ss_size = ss->ss_size;
mips_ss = &new_stack;
}
}
if (oss == NULL) {
mips_oss = NULL;
} else {
if (invalid_pointer((void *)oss)) {
ALOGE("%s: invalid_pointer(oss:%p): Let kernel set proper errno and set return value.", __func__,
oss);
mips_oss = (stack_t *)oss;
} else {
memset(&old_stack, 0, sizeof(stack_t));
mips_oss = &old_stack;
}
}
rv = sigaltstack(mips_ss, mips_oss);
if (!invalid_pointer(oss)) {
oss->ss_sp = old_stack.ss_sp;
oss->ss_flags = old_stack.ss_flags;
oss->ss_size = old_stack.ss_size;
}
ALOGV("%s: return(rv:%d); }", __func__, rv);
return(rv);
}
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