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freebsd-dev/sys/amd64/include/signal.h

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BSD 4.4 Lite Kernel Sources
1994-05-25 01:34:38 +00:00
/*
Update the graffiti.
2003-11-08 04:39:22 +00:00
* Copyright (c) 2003 Peter Wemm.
BSD 4.4 Lite Kernel Sources
1994-05-25 01:34:38 +00:00
* Copyright (c) 1986, 1989, 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)signal.h 8.1 (Berkeley) 6/11/93
$Id$ -> $FreeBSD$
1999-08-28 01:08:13 +00:00
* $FreeBSD$
BSD 4.4 Lite Kernel Sources
1994-05-25 01:34:38 +00:00
*/
Fix standards conformance bugs in <signal.h>: include/signal.h: There was massive namespace pollution from including <sys/types.h>. POSIX functions were declared even when _ANSI_SOURCE is defined. sys.sys/signal.h: NSIG was declared even if _ANSI_SOURCE or _POSIX_SOURCE is defined. sig_atomic_t wasn't declared if _POSIX_SOURCE is defined. Declare a typedef for signal handling functions and use it to unobfuscate declarations and to avoid half-baked function types that cause unwanted compiler warnings at certain warning levels. Fix confusing comment about SA_RESTART. sys/i386/include/signal.h: This has to be included to get the declaration of sig_atomic_t even when _ANSI_SOURCE is defined, so be more careful about polluting the ANSI namespace. Uniformize idempotency ifdefs.
1995-06-28 02:14:13 +00:00
#ifndef _MACHINE_SIGNAL_H_
#define _MACHINE_SIGNAL_H_
Made idempotent. Reviewed by: Submitted by:
1994-08-21 04:55:31 +00:00
Add standards visibility conditionals. Change any uses of sigset_t to struct __sigset to avoid depending on objects from <sys/signal.h>.
2002-10-13 00:31:46 +00:00
#include <sys/cdefs.h>
#include <sys/_sigset.h>
BSD 4.4 Lite Kernel Sources
1994-05-25 01:34:38 +00:00
/*
* Machine-dependent signal definitions
*/
Commit MD parts of a loosely functional AMD64 port. This is based on a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to attempt to get a stable base to start from. There is a lot missing still. Worth noting: - The kernel runs at 1GB in order to cheat with the pmap code. pmap uses a variation of the PAE code in order to avoid having to worry about 4 levels of page tables yet. - It boots in 64 bit "long mode" with a tiny trampoline embedded in the i386 loader. This simplifies locore.s greatly. - There are still quite a few fragments of i386-specific code that have not been translated yet, and some that I cheated and wrote dumb C versions of (bcopy etc). - It has both int 0x80 for syscalls (but using registers for argument passing, as is native on the amd64 ABI), and the 'syscall' instruction for syscalls. int 0x80 preserves all registers, 'syscall' does not. - I have tried to minimize looking at the NetBSD code, except in a couple of places (eg: to find which register they use to replace the trashed %rcx register in the syscall instruction). As a result, there is not a lot of similarity. I did look at NetBSD a few times while debugging to get some ideas about what I might have done wrong in my first attempt.
2003-05-01 01:05:25 +00:00
typedef long sig_atomic_t;
BSD 4.4 Lite Kernel Sources
1994-05-25 01:34:38 +00:00
Add standards visibility conditionals. Change any uses of sigset_t to struct __sigset to avoid depending on objects from <sys/signal.h>.
2002-10-13 00:31:46 +00:00
#if __XSI_VISIBLE
Make MINSIGSTKSZ machine dependent, and have the sigaltstack syscall compare against a variable sv_minsigstksz in struct sysentvec as to properly take the size of the machine- and ABI dependent struct sigframe into account. The SVR4 and iBCS2 modules continue to have a minsigstksz of 8192 to preserve behavior. The real values (if different) are not known at this time. Other ABI modules use the real values. The native MINSIGSTKSZ is now defined as follows: Arch MINSIGSTKSZ ---- ----------- alpha 4096 i386 2048 ia64 12288 Reviewed by: mjacob Suggested by: bde
2000-11-09 08:25:48 +00:00
/*
* Minimum signal stack size. The current signal frame
* for i386 is 408 bytes large.
*/
#define MINSIGSTKSZ (512 * 4)
Add standards visibility conditionals. Change any uses of sigset_t to struct __sigset to avoid depending on objects from <sys/signal.h>.
2002-10-13 00:31:46 +00:00
#endif
Make MINSIGSTKSZ machine dependent, and have the sigaltstack syscall compare against a variable sv_minsigstksz in struct sysentvec as to properly take the size of the machine- and ABI dependent struct sigframe into account. The SVR4 and iBCS2 modules continue to have a minsigstksz of 8192 to preserve behavior. The real values (if different) are not known at this time. Other ABI modules use the real values. The native MINSIGSTKSZ is now defined as follows: Arch MINSIGSTKSZ ---- ----------- alpha 4096 i386 2048 ia64 12288 Reviewed by: mjacob Suggested by: bde
2000-11-09 08:25:48 +00:00
Add standards visibility conditionals. Change any uses of sigset_t to struct __sigset to avoid depending on objects from <sys/signal.h>.
2002-10-13 00:31:46 +00:00
#if __BSD_VISIBLE
BSD 4.4 Lite Kernel Sources
1994-05-25 01:34:38 +00:00
#include <machine/trap.h> /* codes for SIGILL, SIGFPE */
Use struct __ucontext in prototypes and associated functions instead of ucontext_t. Forward declare struct __ucontext in <sys/signal.h> and remove reliance on <sys/ucontext.h> being included. While I'm here, also hide osigcontext types from userland; suggested by bde. Namespace pollution noticed by: Kevin Day <toasty@shell.dragondata.com>
2002-02-17 17:40:34 +00:00
/*
* Only the kernel should need these old type definitions.
*/
BSD 4.4 Lite Kernel Sources
1994-05-25 01:34:38 +00:00
/*
* Information pushed on stack when a signal is delivered.
* This is used by the kernel to restore state following
* execution of the signal handler. It is also made available
* to the handler to allow it to restore state properly if
* a non-standard exit is performed.
*/
Re-introduction of sigcontext. struct sigcontext and ucontext_t/mcontext_t are defined in such a way that both (ie struct sigcontext and ucontext_t) can be passed on to sigreturn. The signal handler is still given a ucontext_t for maximum flexibility. For backward compatibility sigreturn restores the state for the alternate signal stack from sigcontext.sc_onstack and not from ucontext_t.uc_stack. A good way to determine which value the application has set and thus which value to use, is still open for discussion. NOTE: This change should only affect those binaries that use sigcontext and/or ucontext_t. In the source tree itself this is only doscmd. Recompilation is required for those applications. This commit also fixes a lot of style bugs without hopefully adding new ones. NOTE: struct sigaltstack.ss_size now has type size_t again. For some reason I changed that into unsigned int. Parts submitted by: bde sigaltstack bug found by: bde
1999-10-04 19:33:58 +00:00
/*
Reserve space for FPU state in struct sigcontext. Fix some style bugs and comments while there. Submitted by: bde
1999-11-12 13:52:11 +00:00
* The sequence of the fields/registers in struct sigcontext should match
Re-introduction of sigcontext. struct sigcontext and ucontext_t/mcontext_t are defined in such a way that both (ie struct sigcontext and ucontext_t) can be passed on to sigreturn. The signal handler is still given a ucontext_t for maximum flexibility. For backward compatibility sigreturn restores the state for the alternate signal stack from sigcontext.sc_onstack and not from ucontext_t.uc_stack. A good way to determine which value the application has set and thus which value to use, is still open for discussion. NOTE: This change should only affect those binaries that use sigcontext and/or ucontext_t. In the source tree itself this is only doscmd. Recompilation is required for those applications. This commit also fixes a lot of style bugs without hopefully adding new ones. NOTE: struct sigaltstack.ss_size now has type size_t again. For some reason I changed that into unsigned int. Parts submitted by: bde sigaltstack bug found by: bde
1999-10-04 19:33:58 +00:00
* those in mcontext_t.
*/
style(9) the structure definitions.
2001-09-05 01:36:46 +00:00
struct sigcontext {
Add standards visibility conditionals. Change any uses of sigset_t to struct __sigset to avoid depending on objects from <sys/signal.h>.
2002-10-13 00:31:46 +00:00
struct __sigset sc_mask; /* signal mask to restore */
Commit MD parts of a loosely functional AMD64 port. This is based on a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to attempt to get a stable base to start from. There is a lot missing still. Worth noting: - The kernel runs at 1GB in order to cheat with the pmap code. pmap uses a variation of the PAE code in order to avoid having to worry about 4 levels of page tables yet. - It boots in 64 bit "long mode" with a tiny trampoline embedded in the i386 loader. This simplifies locore.s greatly. - There are still quite a few fragments of i386-specific code that have not been translated yet, and some that I cheated and wrote dumb C versions of (bcopy etc). - It has both int 0x80 for syscalls (but using registers for argument passing, as is native on the amd64 ABI), and the 'syscall' instruction for syscalls. int 0x80 preserves all registers, 'syscall' does not. - I have tried to minimize looking at the NetBSD code, except in a couple of places (eg: to find which register they use to replace the trashed %rcx register in the syscall instruction). As a result, there is not a lot of similarity. I did look at NetBSD a few times while debugging to get some ideas about what I might have done wrong in my first attempt.
2003-05-01 01:05:25 +00:00
long sc_onstack; /* sigstack state to restore */
Argh. This file was completely out of sync with mcontext/trapframe.
2003-09-08 18:31:48 +00:00
long sc_rdi; /* machine state (struct trapframe) */
Commit MD parts of a loosely functional AMD64 port. This is based on a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to attempt to get a stable base to start from. There is a lot missing still. Worth noting: - The kernel runs at 1GB in order to cheat with the pmap code. pmap uses a variation of the PAE code in order to avoid having to worry about 4 levels of page tables yet. - It boots in 64 bit "long mode" with a tiny trampoline embedded in the i386 loader. This simplifies locore.s greatly. - There are still quite a few fragments of i386-specific code that have not been translated yet, and some that I cheated and wrote dumb C versions of (bcopy etc). - It has both int 0x80 for syscalls (but using registers for argument passing, as is native on the amd64 ABI), and the 'syscall' instruction for syscalls. int 0x80 preserves all registers, 'syscall' does not. - I have tried to minimize looking at the NetBSD code, except in a couple of places (eg: to find which register they use to replace the trashed %rcx register in the syscall instruction). As a result, there is not a lot of similarity. I did look at NetBSD a few times while debugging to get some ideas about what I might have done wrong in my first attempt.
2003-05-01 01:05:25 +00:00
long sc_rsi;
long sc_rdx;
long sc_rcx;
Argh. This file was completely out of sync with mcontext/trapframe.
2003-09-08 18:31:48 +00:00
long sc_r8;
long sc_r9;
Commit MD parts of a loosely functional AMD64 port. This is based on a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to attempt to get a stable base to start from. There is a lot missing still. Worth noting: - The kernel runs at 1GB in order to cheat with the pmap code. pmap uses a variation of the PAE code in order to avoid having to worry about 4 levels of page tables yet. - It boots in 64 bit "long mode" with a tiny trampoline embedded in the i386 loader. This simplifies locore.s greatly. - There are still quite a few fragments of i386-specific code that have not been translated yet, and some that I cheated and wrote dumb C versions of (bcopy etc). - It has both int 0x80 for syscalls (but using registers for argument passing, as is native on the amd64 ABI), and the 'syscall' instruction for syscalls. int 0x80 preserves all registers, 'syscall' does not. - I have tried to minimize looking at the NetBSD code, except in a couple of places (eg: to find which register they use to replace the trashed %rcx register in the syscall instruction). As a result, there is not a lot of similarity. I did look at NetBSD a few times while debugging to get some ideas about what I might have done wrong in my first attempt.
2003-05-01 01:05:25 +00:00
long sc_rax;
Argh. This file was completely out of sync with mcontext/trapframe.
2003-09-08 18:31:48 +00:00
long sc_rbx;
long sc_rbp;
long sc_r10;
long sc_r11;
long sc_r12;
long sc_r13;
long sc_r14;
long sc_r15;
Commit MD parts of a loosely functional AMD64 port. This is based on a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to attempt to get a stable base to start from. There is a lot missing still. Worth noting: - The kernel runs at 1GB in order to cheat with the pmap code. pmap uses a variation of the PAE code in order to avoid having to worry about 4 levels of page tables yet. - It boots in 64 bit "long mode" with a tiny trampoline embedded in the i386 loader. This simplifies locore.s greatly. - There are still quite a few fragments of i386-specific code that have not been translated yet, and some that I cheated and wrote dumb C versions of (bcopy etc). - It has both int 0x80 for syscalls (but using registers for argument passing, as is native on the amd64 ABI), and the 'syscall' instruction for syscalls. int 0x80 preserves all registers, 'syscall' does not. - I have tried to minimize looking at the NetBSD code, except in a couple of places (eg: to find which register they use to replace the trashed %rcx register in the syscall instruction). As a result, there is not a lot of similarity. I did look at NetBSD a few times while debugging to get some ideas about what I might have done wrong in my first attempt.
2003-05-01 01:05:25 +00:00
long sc_trapno;
Argh. This file was completely out of sync with mcontext/trapframe.
2003-09-08 18:31:48 +00:00
long sc_addr;
Pull the tier-2 card one last time and break the get/setcontext and sigreturn() ABI and the signal context on the stack. Make the trapframe (and its shadows in the ucontext and sigframe etc) 8 bytes larger in order to preserve 16 byte stack alignment for the following C code calls. I could have done some padding after the trapframe was saved, but some of the C code still expects an argument of 'struct trapframe'. Anyway, this gives me a spare field that can be used to store things like 'partial trapframe' status or something else in the future. The runtime impact is fairly small, *except* for threaded apps and things that decode contexts and the signal stack (eg: cvsup binary). Signal delivery isn't too badly affected because the kernel generates the sigframe that sigreturn uses after the handler has been called. The size of mcontext_t and struct sigframe hasn't changed. Only the last few fields (sc_eip etc) got moved a little and I eliminated a spare field. mc_len/sc_len did change location though so the sanity checks there will still trap it.
2003-10-15 02:04:52 +00:00
long sc_flags;
Commit MD parts of a loosely functional AMD64 port. This is based on a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to attempt to get a stable base to start from. There is a lot missing still. Worth noting: - The kernel runs at 1GB in order to cheat with the pmap code. pmap uses a variation of the PAE code in order to avoid having to worry about 4 levels of page tables yet. - It boots in 64 bit "long mode" with a tiny trampoline embedded in the i386 loader. This simplifies locore.s greatly. - There are still quite a few fragments of i386-specific code that have not been translated yet, and some that I cheated and wrote dumb C versions of (bcopy etc). - It has both int 0x80 for syscalls (but using registers for argument passing, as is native on the amd64 ABI), and the 'syscall' instruction for syscalls. int 0x80 preserves all registers, 'syscall' does not. - I have tried to minimize looking at the NetBSD code, except in a couple of places (eg: to find which register they use to replace the trashed %rcx register in the syscall instruction). As a result, there is not a lot of similarity. I did look at NetBSD a few times while debugging to get some ideas about what I might have done wrong in my first attempt.
2003-05-01 01:05:25 +00:00
long sc_err;
long sc_rip;
long sc_cs;
long sc_rflags;
long sc_rsp;
long sc_ss;
long sc_len; /* sizeof(mcontext_t) */
Reserve space for FPU state in struct sigcontext. Fix some style bugs and comments while there. Submitted by: bde
1999-11-12 13:52:11 +00:00
/*
Rename npx* to fpu*. I haven't done the flags/function names yet.
2003-11-08 02:39:46 +00:00
* XXX - See <machine/ucontext.h> and <machine/fpu.h> for
Add kernel support needed for the KSE-aware libpthread: - Maintain fpu state across signals. - Save and restore FPU state properly in ucontext_t's. Reviewed by: deischen, julian Approved by: -arch
2002-09-16 19:25:41 +00:00
* the following fields.
Reserve space for FPU state in struct sigcontext. Fix some style bugs and comments while there. Submitted by: bde
1999-11-12 13:52:11 +00:00
*/
Commit MD parts of a loosely functional AMD64 port. This is based on a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to attempt to get a stable base to start from. There is a lot missing still. Worth noting: - The kernel runs at 1GB in order to cheat with the pmap code. pmap uses a variation of the PAE code in order to avoid having to worry about 4 levels of page tables yet. - It boots in 64 bit "long mode" with a tiny trampoline embedded in the i386 loader. This simplifies locore.s greatly. - There are still quite a few fragments of i386-specific code that have not been translated yet, and some that I cheated and wrote dumb C versions of (bcopy etc). - It has both int 0x80 for syscalls (but using registers for argument passing, as is native on the amd64 ABI), and the 'syscall' instruction for syscalls. int 0x80 preserves all registers, 'syscall' does not. - I have tried to minimize looking at the NetBSD code, except in a couple of places (eg: to find which register they use to replace the trashed %rcx register in the syscall instruction). As a result, there is not a lot of similarity. I did look at NetBSD a few times while debugging to get some ideas about what I might have done wrong in my first attempt.
2003-05-01 01:05:25 +00:00
long sc_fpformat;
long sc_ownedfp;
Hmm. Two copies of the mcontext...
2003-09-08 18:28:41 +00:00
long sc_fpstate[64] __aligned(16);
Pull the tier-2 card one last time and break the get/setcontext and sigreturn() ABI and the signal context on the stack. Make the trapframe (and its shadows in the ucontext and sigframe etc) 8 bytes larger in order to preserve 16 byte stack alignment for the following C code calls. I could have done some padding after the trapframe was saved, but some of the C code still expects an argument of 'struct trapframe'. Anyway, this gives me a spare field that can be used to store things like 'partial trapframe' status or something else in the future. The runtime impact is fairly small, *except* for threaded apps and things that decode contexts and the signal stack (eg: cvsup binary). Signal delivery isn't too badly affected because the kernel generates the sigframe that sigreturn uses after the handler has been called. The size of mcontext_t and struct sigframe hasn't changed. Only the last few fields (sc_eip etc) got moved a little and I eliminated a spare field. mc_len/sc_len did change location though so the sanity checks there will still trap it.
2003-10-15 02:04:52 +00:00
long sc_spare[8];
Re-introduction of sigcontext. struct sigcontext and ucontext_t/mcontext_t are defined in such a way that both (ie struct sigcontext and ucontext_t) can be passed on to sigreturn. The signal handler is still given a ucontext_t for maximum flexibility. For backward compatibility sigreturn restores the state for the alternate signal stack from sigcontext.sc_onstack and not from ucontext_t.uc_stack. A good way to determine which value the application has set and thus which value to use, is still open for discussion. NOTE: This change should only affect those binaries that use sigcontext and/or ucontext_t. In the source tree itself this is only doscmd. Recompilation is required for those applications. This commit also fixes a lot of style bugs without hopefully adding new ones. NOTE: struct sigaltstack.ss_size now has type size_t again. For some reason I changed that into unsigned int. Parts submitted by: bde sigaltstack bug found by: bde
1999-10-04 19:33:58 +00:00
};
Add standards visibility conditionals. Change any uses of sigset_t to struct __sigset to avoid depending on objects from <sys/signal.h>.
2002-10-13 00:31:46 +00:00
#endif /* __BSD_VISIBLE */
Fix standards conformance bugs in <signal.h>: include/signal.h: There was massive namespace pollution from including <sys/types.h>. POSIX functions were declared even when _ANSI_SOURCE is defined. sys.sys/signal.h: NSIG was declared even if _ANSI_SOURCE or _POSIX_SOURCE is defined. sig_atomic_t wasn't declared if _POSIX_SOURCE is defined. Declare a typedef for signal handling functions and use it to unobfuscate declarations and to avoid half-baked function types that cause unwanted compiler warnings at certain warning levels. Fix confusing comment about SA_RESTART. sys/i386/include/signal.h: This has to be included to get the declaration of sig_atomic_t even when _ANSI_SOURCE is defined, so be more careful about polluting the ANSI namespace. Uniformize idempotency ifdefs.
1995-06-28 02:14:13 +00:00
#endif /* !_MACHINE_SIGNAL_H_ */
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