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pjs/nsprpub/pr/include/md/_linux.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nspr_linux_defs_h___
#define nspr_linux_defs_h___
#include "prthread.h"
/*
* Internal configuration macros
*/
#define PR_LINKER_ARCH "linux"
#define _PR_SI_SYSNAME "LINUX"
#ifdef __powerpc__
#define _PR_SI_ARCHITECTURE "ppc"
#elif defined(__alpha)
#define _PR_SI_ARCHITECTURE "alpha"
#elif defined(__mc68000__)
#define _PR_SI_ARCHITECTURE "m68k"
#elif defined(__sparc__)
#define _PR_SI_ARCHITECTURE "sparc"
#elif defined(__i386__)
#define _PR_SI_ARCHITECTURE "x86"
#elif defined(__mips__)
#define _PR_SI_ARCHITECTURE "mips"
#elif defined(__arm__)
#define _PR_SI_ARCHITECTURE "arm"
#else
#error "Unknown CPU architecture"
#endif
#define PR_DLL_SUFFIX ".so"
#define _PR_VMBASE 0x30000000
#define _PR_STACK_VMBASE 0x50000000
#define _MD_DEFAULT_STACK_SIZE 65536L
#define _MD_MMAP_FLAGS MAP_PRIVATE
#undef HAVE_STACK_GROWING_UP
/*
* Elf linux supports dl* functions
*/
#define HAVE_DLL
#define USE_DLFCN
#define USE_SETJMP
#if defined(__GLIBC__) && __GLIBC__ >= 2
#define _PR_POLL_AVAILABLE
#endif
#undef _PR_USE_POLL
#define _PR_STAT_HAS_ONLY_ST_ATIME
#if defined(__alpha)
#define _PR_HAVE_LARGE_OFF_T
#else
#define _PR_NO_LARGE_FILES
#endif
#ifdef _PR_PTHREADS
extern void _MD_CleanupBeforeExit(void);
#define _MD_CLEANUP_BEFORE_EXIT _MD_CleanupBeforeExit
#else /* ! _PR_PTHREADS */
#include <setjmp.h>
#define PR_CONTEXT_TYPE sigjmp_buf
#define CONTEXT(_th) ((_th)->md.context)
#ifdef __powerpc__
/*
* PowerPC based MkLinux
*
* On the PowerPC, the new style jmp_buf isn't used until glibc
* 2.1.
*/
#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1
#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[JB_GPR1]
#else
#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__misc[0]
#endif /* __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1 */
#define _MD_SET_FP(_t, val)
#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
#define _MD_GET_FP_PTR(_t) ((void *) 0)
/* aix = 64, macos = 70 */
#define PR_NUM_GCREGS 64
#elif defined(__alpha)
/* Alpha based Linux */
#if defined(__GLIBC__) && __GLIBC__ >= 2
#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[JB_SP]
#define _MD_SET_FP(_t, val)
#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
#define _MD_GET_FP_PTR(_t) ((void *) 0)
#define _MD_SP_TYPE long int
#else
#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__sp
#define _MD_SET_FP(_t, val)
#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
#define _MD_GET_FP_PTR(_t) ((void *) 0)
#define _MD_SP_TYPE __ptr_t
#endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
/* XXX not sure if this is correct, or maybe it should be 17? */
#define PR_NUM_GCREGS 9
#elif defined(__mc68000__)
/* m68k based Linux */
/*
* On the m68k, glibc still uses the old style sigjmp_buf, even
* in glibc 2.0.7.
*/
#if defined(__GLIBC__) && __GLIBC__ >= 2
#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__sp
#define _MD_SET_FP(_t, val)
#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
#define _MD_GET_FP_PTR(_t) ((void *) 0)
#else
#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__sp
#define _MD_SET_FP(_t, val)
#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
#define _MD_GET_FP_PTR(_t) ((void *) 0)
#endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
/* XXX not sure if this is correct, or maybe it should be 17? */
#define PR_NUM_GCREGS 9
#elif defined(__sparc__)
/* Sparc */
#if defined(__GLIBC__) && __GLIBC__ >= 2
/*
* FIXME: The setjmp/longjmp approach works in Red Hat 4.2 but
* not in Red Hat 5.1 for Linux/Sparc. We should talk to the
* maintainer of Linux/Sparc glibc2 about this. Or we can write
* assembly code to save and restore thread contexts. Before
* this problem is solved, you can build the pthreads version.
* Set the environment variable USE_PTHREADS to 1 before you
* build.
*/
#error "Please see comments in pr/include/md/_linux.h"
#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[JB_SP]
#define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[JB_FP] = val)
#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
#define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[JB_FP])
#define _MD_SP_TYPE int
#else
#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__fp
#define _MD_SET_FP(_t, val)
#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
#define _MD_GET_FP_PTR(_t) ((void *) 0)
#define _MD_SP_TYPE __ptr_t
#endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
#elif defined(__i386__)
/* Intel based Linux */
#if defined(__GLIBC__) && __GLIBC__ >= 2
#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[JB_SP]
#define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[JB_BP] = val)
#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
#define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[JB_BP])
#define _MD_SP_TYPE int
#else
#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__sp
#define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[0].__bp = val)
#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
#define _MD_GET_FP_PTR(_t) &((_t)->md.context[0].__jmpbuf[0].__bp)
#define _MD_SP_TYPE __ptr_t
#endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
#define PR_NUM_GCREGS 6
#elif defined(__mips__)
/* Linux/MIPS */
#if defined(__GLIBC__) && __GLIBC__ >= 2
#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__sp
#define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[0].__fp = (val))
#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
#define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[0].__fp)
#define _MD_SP_TYPE __ptr_t
#else
#error "Linux/MIPS pre-glibc2 not supported yet"
#endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
#elif defined(__arm__)
/* ARM/Linux */
#if defined(__GLIBC__) && __GLIBC__ >= 2
#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[20]
#define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[19] = (val))
#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
#define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[19])
#define _MD_SP_TYPE __ptr_t
#else
#error "ARM/Linux pre-glibc2 not supported yet"
#endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
#else
#error "Unknown CPU architecture"
#endif /*__powerpc__*/
/*
** Initialize a thread context to run "_main()" when started
*/
#ifdef __powerpc__
#define _MD_INIT_CONTEXT(_thread, _sp, _main, status) \
{ \
*status = PR_TRUE; \
if (sigsetjmp(CONTEXT(_thread), 1)) { \
_main(); \
} \
_MD_GET_SP(_thread) = (unsigned char*) ((_sp) - 128); \
_thread->md.sp = _MD_GET_SP_PTR(_thread); \
_thread->md.fp = _MD_GET_FP_PTR(_thread); \
_MD_SET_FP(_thread, 0); \
}
#elif defined(__mips__)
#define _MD_INIT_CONTEXT(_thread, _sp, _main, status) \
{ \
*status = PR_TRUE; \
(void) sigsetjmp(CONTEXT(_thread), 1); \
_thread->md.context[0].__jmpbuf[0].__pc = (__ptr_t) _main; \
_MD_GET_SP(_thread) = (_MD_SP_TYPE) ((_sp) - 64); \
_thread->md.sp = _MD_GET_SP_PTR(_thread); \
_thread->md.fp = _MD_GET_FP_PTR(_thread); \
_MD_SET_FP(_thread, 0); \
}
#else
#define _MD_INIT_CONTEXT(_thread, _sp, _main, status) \
{ \
*status = PR_TRUE; \
if (sigsetjmp(CONTEXT(_thread), 1)) { \
_main(); \
} \
_MD_GET_SP(_thread) = (_MD_SP_TYPE) ((_sp) - 64); \
_thread->md.sp = _MD_GET_SP_PTR(_thread); \
_thread->md.fp = _MD_GET_FP_PTR(_thread); \
_MD_SET_FP(_thread, 0); \
}
#endif /*__powerpc__*/
#define _MD_SWITCH_CONTEXT(_thread) \
if (!sigsetjmp(CONTEXT(_thread), 1)) { \
(_thread)->md.errcode = errno; \
_PR_Schedule(); \
}
/*
** Restore a thread context, saved by _MD_SWITCH_CONTEXT
*/
#define _MD_RESTORE_CONTEXT(_thread) \
{ \
errno = (_thread)->md.errcode; \
_MD_SET_CURRENT_THREAD(_thread); \
siglongjmp(CONTEXT(_thread), 1); \
}
/* Machine-dependent (MD) data structures */
struct _MDThread {
PR_CONTEXT_TYPE context;
void *sp;
void *fp;
int id;
int errcode;
};
struct _MDThreadStack {
PRInt8 notused;
};
struct _MDLock {
PRInt8 notused;
};
struct _MDSemaphore {
PRInt8 notused;
};
struct _MDCVar {
PRInt8 notused;
};
struct _MDSegment {
PRInt8 notused;
};
/*
* md-specific cpu structure field
*/
#include <sys/time.h> /* for FD_SETSIZE */
#define _PR_MD_MAX_OSFD FD_SETSIZE
struct _MDCPU_Unix {
PRCList ioQ;
PRUint32 ioq_timeout;
PRInt32 ioq_max_osfd;
PRInt32 ioq_osfd_cnt;
#ifndef _PR_USE_POLL
fd_set fd_read_set, fd_write_set, fd_exception_set;
PRInt16 fd_read_cnt[_PR_MD_MAX_OSFD],fd_write_cnt[_PR_MD_MAX_OSFD],
fd_exception_cnt[_PR_MD_MAX_OSFD];
#else
struct pollfd *ioq_pollfds;
int ioq_pollfds_size;
#endif /* _PR_USE_POLL */
};
#define _PR_IOQ(_cpu) ((_cpu)->md.md_unix.ioQ)
#define _PR_ADD_TO_IOQ(_pq, _cpu) PR_APPEND_LINK(&_pq.links, &_PR_IOQ(_cpu))
#define _PR_FD_READ_SET(_cpu) ((_cpu)->md.md_unix.fd_read_set)
#define _PR_FD_READ_CNT(_cpu) ((_cpu)->md.md_unix.fd_read_cnt)
#define _PR_FD_WRITE_SET(_cpu) ((_cpu)->md.md_unix.fd_write_set)
#define _PR_FD_WRITE_CNT(_cpu) ((_cpu)->md.md_unix.fd_write_cnt)
#define _PR_FD_EXCEPTION_SET(_cpu) ((_cpu)->md.md_unix.fd_exception_set)
#define _PR_FD_EXCEPTION_CNT(_cpu) ((_cpu)->md.md_unix.fd_exception_cnt)
#define _PR_IOQ_TIMEOUT(_cpu) ((_cpu)->md.md_unix.ioq_timeout)
#define _PR_IOQ_MAX_OSFD(_cpu) ((_cpu)->md.md_unix.ioq_max_osfd)
#define _PR_IOQ_OSFD_CNT(_cpu) ((_cpu)->md.md_unix.ioq_osfd_cnt)
#define _PR_IOQ_POLLFDS(_cpu) ((_cpu)->md.md_unix.ioq_pollfds)
#define _PR_IOQ_POLLFDS_SIZE(_cpu) ((_cpu)->md.md_unix.ioq_pollfds_size)
#define _PR_IOQ_MIN_POLLFDS_SIZE(_cpu) 32
struct _MDCPU {
struct _MDCPU_Unix md_unix;
};
#define _MD_INIT_LOCKS()
#define _MD_NEW_LOCK(lock) PR_SUCCESS
#define _MD_FREE_LOCK(lock)
#define _MD_LOCK(lock)
#define _MD_UNLOCK(lock)
#define _MD_INIT_IO()
#define _MD_IOQ_LOCK()
#define _MD_IOQ_UNLOCK()
extern PRStatus _MD_InitializeThread(PRThread *thread);
#define _MD_INIT_RUNNING_CPU(cpu) _MD_unix_init_running_cpu(cpu)
#define _MD_INIT_THREAD _MD_InitializeThread
#define _MD_EXIT_THREAD(thread)
#define _MD_SUSPEND_THREAD(thread) _MD_suspend_thread
#define _MD_RESUME_THREAD(thread) _MD_resume_thread
#define _MD_CLEAN_THREAD(_thread)
extern PRStatus _MD_CREATE_THREAD(
PRThread *thread,
void (*start) (void *),
PRThreadPriority priority,
PRThreadScope scope,
PRThreadState state,
PRUint32 stackSize);
extern void _MD_SET_PRIORITY(struct _MDThread *thread, PRUintn newPri);
extern PRStatus _MD_WAIT(PRThread *, PRIntervalTime timeout);
extern PRStatus _MD_WAKEUP_WAITER(PRThread *);
extern void _MD_YIELD(void);
#endif /* ! _PR_PTHREADS */
extern void _MD_EarlyInit(void);
extern PRIntervalTime _PR_UNIX_GetInterval(void);
extern PRIntervalTime _PR_UNIX_TicksPerSecond(void);
#define _MD_EARLY_INIT _MD_EarlyInit
#define _MD_FINAL_INIT _PR_UnixInit
#define _MD_GET_INTERVAL _PR_UNIX_GetInterval
#define _MD_INTERVAL_PER_SEC _PR_UNIX_TicksPerSecond
/*
* We wrapped the select() call. _MD_SELECT refers to the built-in,
* unwrapped version.
*/
#define _MD_SELECT __select
#ifdef _PR_POLL_AVAILABLE
#include <sys/poll.h>
extern int __syscall_poll(struct pollfd *ufds, unsigned long int nfds,
int timeout);
#define _MD_POLL __syscall_poll
#endif
/* For writev() */
#include <sys/uio.h>
#endif /* nspr_linux_defs_h___ */
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