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/* Copyright 2013-2016
* Kaz Kylheku <kaz@kylheku.com>
* Vancouver, Canada
* All rights reserved.
*
* Redistribution of this software in source and binary forms, with or without
* modification, is permitted provided that the following two conditions are met.
*
* Use of this software in any manner constitutes agreement with the disclaimer
* which follows the two conditions.
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 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.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DAMAGES, HOWEVER CAUSED,
* AND UNDER ANY THEORY OF LIABILITY, ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#if CONFIG_DEBUG_SUPPORT
extern int debug_depth;
#define EJ_DBG_MEMB volatile int dbg_depth;
#define EJ_DBG_SAVE(EJB) (EJB).dbg_depth = debug_depth,
#define EJ_DBG_REST(EJB) debug_depth = (EJB).dbg_depth,
#else
#define EJ_DBG_MEMB
#define EJ_DBG_SAVE(EJB)
#define EJ_DBG_REST(EJB)
#endif
#define EJ_OPT_MEMB EJ_DBG_MEMB
#define EJ_OPT_SAVE(EJB) EJ_DBG_SAVE(EJB)
#define EJ_OPT_REST(EJB) EJ_DBG_REST(EJB)
#if __i386__
struct jmp {
unsigned eip;
unsigned esp;
unsigned ebp;
unsigned ebx;
unsigned esi;
unsigned edi;
};
#elif __x86_64__
struct jmp {
unsigned long rip;
unsigned long rsp;
unsigned long rbp;
unsigned long rbx;
unsigned long r12;
unsigned long r13;
unsigned long r14;
unsigned long r15;
};
#elif __arm__ && !__thumb__
struct jmp {
unsigned long r4;
unsigned long r5;
unsigned long r6;
unsigned long r7;
unsigned long r8;
unsigned long r9;
unsigned long r10;
unsigned long fp;
unsigned long sp;
unsigned long lr;
};
#elif __arm__ && __thumb__
struct jmp {
unsigned long lr;
unsigned long r4;
unsigned long r5;
unsigned long r6;
unsigned long r7;
unsigned long r8;
unsigned long r9;
unsigned long r10;
unsigned long fp;
unsigned long sp;
};
#elif __PPC64__
struct jmp {
unsigned long r1;
unsigned long r2;
unsigned long r11;
unsigned long r12;
unsigned long r13;
unsigned long r14;
unsigned long r15;
unsigned long r16;
unsigned long r17;
unsigned long r18;
unsigned long r19;
unsigned long r20;
unsigned long r21;
unsigned long r22;
unsigned long r23;
unsigned long r24;
unsigned long r25;
unsigned long r26;
unsigned long r27;
unsigned long r28;
unsigned long r29;
unsigned long r30;
unsigned long r31;
};
#else
#error port me!
#endif
#ifdef __cplusplus
extern "C" {
#endif
int jmp_save(struct jmp *);
void jmp_restore(struct jmp *, int);
#ifdef __cplusplus
}
#endif
#if HAVE_POSIX_SIGS
typedef struct {
unsigned int set;
} small_sigset_t;
#define sig_save_enable \
do { \
int sig_save = async_sig_enabled; \
if (!sig_save) \
sig_check(); \
async_sig_enabled = 1; \
{ \
do ; while (0)
#define sig_restore_enable \
} \
async_sig_enabled = sig_save; \
} while(0)
#define sig_save_disable \
do { \
int sig_save = async_sig_enabled; \
async_sig_enabled = 0; \
{ \
do ; while (0)
#define sig_restore_disable \
} \
async_sig_enabled = sig_save; \
if (sig_save) \
sig_check(); \
} while(0)
val sig_check(void);
INLINE val sig_check_fast(void)
{
extern volatile unsigned long sig_deferred;
return if2(sig_deferred, sig_check());
}
typedef struct {
struct jmp jb;
volatile sig_atomic_t se;
volatile small_sigset_t blocked;
volatile val de;
volatile int gc;
val **volatile gc_pt;
EJ_OPT_MEMB
volatile int rv;
} extended_jmp_buf;
#define extended_setjmp(EJB) \
(jmp_save(&(EJB).jb) \
? (async_sig_enabled = (EJB).se, \
dyn_env = (EJB).de, \
gc_enabled = (EJB).gc, \
gc_prot_top = (EJB).gc_pt, \
sig_mask(SIG_SETMASK, \
strip_qual(small_sigset_t *, \
&(EJB).blocked), 0), \
EJ_OPT_REST(EJB) \
(EJB).rv) \
: ((EJB).se = async_sig_enabled, \
(EJB).de = dyn_env, \
(EJB).gc = gc_enabled, \
(EJB).gc_pt = gc_prot_top, \
(EJB).blocked.set = sig_blocked_cache.set,\
EJ_OPT_SAVE(EJB) \
0))
#define extended_longjmp(EJB, ARG) \
((EJB).rv = (ARG), jmp_restore(&(EJB).jb, 1))
extern small_sigset_t sig_blocked_cache;
extern volatile sig_atomic_t async_sig_enabled;
#else
#define sig_save_enable do { do ; while (0)
#define sig_save_disable do { do ; while (0)
#define sig_restore_enable } while (0)
#define sig_restore_disable } while (0)
#define sig_check_fast() ((void) 0)
typedef struct {
struct jmp jb;
volatile val de;
volatile int gc;
val **volatile gc_pt;
EJ_OPT_MEMB
volatile int rv;
} extended_jmp_buf;
#define extended_setjmp(EJB) \
(jmp_save(&(EJB).jb) \
? (dyn_env = (EJB).de, \
gc_enabled = ((EJB).gc), \
gc_prot_top = (EJB).gc_pt, \
EJ_OPT_REST(EJB) \
(EJB).rv) \
: ((EJB).de = dyn_env, \
(EJB).gc = gc_enabled, \
(EJB).gc_pt = gc_prot_top, \
EJ_OPT_SAVE(EJB) \
0))
#define extended_longjmp(EJB, ARG) \
((EJB).rv = (ARG), jmp_restore(&(EJB).jb, 1))
extern int async_sig_enabled;
#endif
extern val dyn_env; /* eval.c */
void sig_init(void);
val set_sig_handler(val signo, val lambda);
val get_sig_handler(val signo);
#if HAVE_POSIX_SIGS
int sig_mask(int how, const small_sigset_t *set, small_sigset_t *oldset);
#endif
#if HAVE_ITIMER
val getitimer_wrap(val which);
val setitimer_wrap(val which, val interval, val currval);
#endif
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