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freebsd-nq/sys/i386/include/ucontext.h

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sigset_t change (part 3 of 5) ----------------------------- By introducing a new sigframe so that the signal handler operates on the new siginfo_t and on ucontext_t instead of sigcontext, we now need two version of sendsig and sigreturn. A flag in struct proc determines whether the process expects an old sigframe or a new sigframe. The signal trampoline handles which sigreturn to call. It does this by testing for a magic cookie in the frame. The alpha uses osigreturn to implement longjmp. This means that osigreturn is not only used for compatibility with existing binaries. To handle the new sigset_t, setjmp saves it in sc_reserved (see NOTE). the struct sigframe has been moved from frame.h to sigframe.h to handle the complex header dependencies that was caused by the new sigframe. NOTE: For the i386, the size of jmp_buf has been increased to hold the new sigset_t. On the alpha this has been prevented by using sc_reserved in sigcontext.
1999-09-29 15:06:27 +00:00
/*-
* Copyright (c) 1999 Marcel Moolenaar
* 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
* in this position and unchanged.
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* $FreeBSD$
*/
#ifndef _MACHINE_UCONTEXT_H_
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
#define _MACHINE_UCONTEXT_H_
sigset_t change (part 3 of 5) ----------------------------- By introducing a new sigframe so that the signal handler operates on the new siginfo_t and on ucontext_t instead of sigcontext, we now need two version of sendsig and sigreturn. A flag in struct proc determines whether the process expects an old sigframe or a new sigframe. The signal trampoline handles which sigreturn to call. It does this by testing for a magic cookie in the frame. The alpha uses osigreturn to implement longjmp. This means that osigreturn is not only used for compatibility with existing binaries. To handle the new sigset_t, setjmp saves it in sc_reserved (see NOTE). the struct sigframe has been moved from frame.h to sigframe.h to handle the complex header dependencies that was caused by the new sigframe. NOTE: For the i386, the size of jmp_buf has been increased to hold the new sigset_t. On the alpha this has been prevented by using sc_reserved in sigcontext.
1999-09-29 15:06:27 +00:00
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
typedef struct __mcontext {
/*
Simplification of the signal trampoline and other cleanups. o Remove unused defines from genassym.c that were needed by the trampoline. o Add load_gs_param function to support.s that catches a fault when %gs is loaded with an invalid descriptor. The function returns EFAULT in that case. o Remove struct trapframe from mcontext_t and replace it with the list of registers. o Modify sendsig and sigreturn accordingly. This commit contains a patch by bde. Reviewed by: luoqi, jdp
1999-10-07 12:40:34 +00:00
* The first 20 fields must match the definition of
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
* sigcontext. So that we can support sigcontext
* and ucontext_t at the same time.
*/
MFamd64: use register_t's.
2005-09-12 03:34:05 +00:00
__register_t mc_onstack; /* XXX - sigcontext compat. */
__register_t mc_gs; /* machine state (struct trapframe) */
__register_t mc_fs;
__register_t mc_es;
__register_t mc_ds;
__register_t mc_edi;
__register_t mc_esi;
__register_t mc_ebp;
__register_t mc_isp;
__register_t mc_ebx;
__register_t mc_edx;
__register_t mc_ecx;
__register_t mc_eax;
__register_t mc_trapno;
__register_t mc_err;
__register_t mc_eip;
__register_t mc_cs;
__register_t mc_eflags;
__register_t mc_esp;
__register_t mc_ss;
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 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
int mc_len; /* sizeof(mcontext_t) */
Add another temporary hack to allow running older i386 binaries. This will be removed when new versions of syscalls sigreturn() and sigaction() are added (mini is working on this but is in the middle of a move). This should fix the problem of cvsupd dying.
2002-10-04 14:50:55 +00:00
#define _MC_FPFMT_NODEV 0x10000 /* device not present or configured */
#define _MC_FPFMT_387 0x10001
#define _MC_FPFMT_XMM 0x10002
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
int mc_fpformat;
Add another temporary hack to allow running older i386 binaries. This will be removed when new versions of syscalls sigreturn() and sigaction() are added (mini is working on this but is in the middle of a move). This should fix the problem of cvsupd dying.
2002-10-04 14:50:55 +00:00
#define _MC_FPOWNED_NONE 0x20000 /* FP state not used */
#define _MC_FPOWNED_FPU 0x20001 /* FP state came from FPU */
#define _MC_FPOWNED_PCB 0x20002 /* FP state came from PCB */
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
int mc_ownedfp;
int mc_spare1[1]; /* align next field to 16 bytes */
Align the FPU state in the ucontext and sigcontext to 16 bytes to accomodate the new SSE/XMM floating point save/restore instructions. This commit is mostly from bde and includes some style nits. Approved by: re (jhb)
2002-12-02 19:58:55 +00:00
/*
* See <machine/npx.h> for the internals of mc_fpstate[].
*/
int mc_fpstate[128] __aligned(16);
Add all segment registers for the amd64 CPU to struct reg and mcontext. To keep these structures ABI-compatible, half the size of r_trapno, r_err, mc_trapno, mc_flags. Add fsbase and gsbase to mcontext on both amd64 and i386. Add flags to amd64 mcontext to indicate that it contains valid segments or bases. In collaboration with: pho Discussed with: peter Reviewed by: jhb
2009-04-01 12:44:17 +00:00
__register_t mc_fsbase;
__register_t mc_gsbase;
int mc_spare2[6];
sigset_t change (part 3 of 5) ----------------------------- By introducing a new sigframe so that the signal handler operates on the new siginfo_t and on ucontext_t instead of sigcontext, we now need two version of sendsig and sigreturn. A flag in struct proc determines whether the process expects an old sigframe or a new sigframe. The signal trampoline handles which sigreturn to call. It does this by testing for a magic cookie in the frame. The alpha uses osigreturn to implement longjmp. This means that osigreturn is not only used for compatibility with existing binaries. To handle the new sigset_t, setjmp saves it in sc_reserved (see NOTE). the struct sigframe has been moved from frame.h to sigframe.h to handle the complex header dependencies that was caused by the new sigframe. NOTE: For the i386, the size of jmp_buf has been increased to hold the new sigset_t. On the alpha this has been prevented by using sc_reserved in sigcontext.
1999-09-29 15:06:27 +00:00
} mcontext_t;
Add getcontext, setcontext, and swapcontext as system calls. Previously these were libc functions but were requested to be made into system calls for atomicity and to coalesce what might be two entrances into the kernel (signal mask setting and floating point trap) into one. A few style nits and comments from bde are also included. Tested on alpha by: gallatin
2002-11-16 06:35:53 +00:00
#if defined(_KERNEL) && defined(COMPAT_FREEBSD4)
Add all segment registers for the amd64 CPU to struct reg and mcontext. To keep these structures ABI-compatible, half the size of r_trapno, r_err, mc_trapno, mc_flags. Add fsbase and gsbase to mcontext on both amd64 and i386. Add flags to amd64 mcontext to indicate that it contains valid segments or bases. In collaboration with: pho Discussed with: peter Reviewed by: jhb
2009-04-01 12:44:17 +00:00
Split 4.x and 5.x signal handling so that we can keep 4.x signal handling clean and functional as 5.x evolves. This allows some of the nasty bandaids in the 5.x codepaths to be unwound. Encapsulate 4.x signal handling under COMPAT_FREEBSD4 (there is an anti-foot-shooting measure in place, 5.x folks need this for a while) and finish encapsulating the older stuff under COMPAT_43. Since the ancient stuff is required on alpha (longjmp(3) passes a 'struct osigcontext *' to the current sigreturn(2), instead of the 'ucontext_t *' that sigreturn is supposed to take), add a compile time check to prevent foot shooting there too. Add uniform COMPAT_43 stubs for ia64/sparc64/powerpc. Tested on: i386, alpha, ia64. Compiled on sparc64 (a few days ago). Approved by: re
2002-10-25 19:10:58 +00:00
struct mcontext4 {
MFamd64: use register_t's.
2005-09-12 03:34:05 +00:00
__register_t mc_onstack; /* XXX - sigcontext compat. */
__register_t mc_gs; /* machine state (struct trapframe) */
__register_t mc_fs;
__register_t mc_es;
__register_t mc_ds;
__register_t mc_edi;
__register_t mc_esi;
__register_t mc_ebp;
__register_t mc_isp;
__register_t mc_ebx;
__register_t mc_edx;
__register_t mc_ecx;
__register_t mc_eax;
__register_t mc_trapno;
__register_t mc_err;
__register_t mc_eip;
__register_t mc_cs;
__register_t mc_eflags;
__register_t mc_esp; /* machine state */
__register_t mc_ss;
__register_t mc_fpregs[28]; /* env87 + fpacc87 + u_long */
__register_t __spare__[17];
Split 4.x and 5.x signal handling so that we can keep 4.x signal handling clean and functional as 5.x evolves. This allows some of the nasty bandaids in the 5.x codepaths to be unwound. Encapsulate 4.x signal handling under COMPAT_FREEBSD4 (there is an anti-foot-shooting measure in place, 5.x folks need this for a while) and finish encapsulating the older stuff under COMPAT_43. Since the ancient stuff is required on alpha (longjmp(3) passes a 'struct osigcontext *' to the current sigreturn(2), instead of the 'ucontext_t *' that sigreturn is supposed to take), add a compile time check to prevent foot shooting there too. Add uniform COMPAT_43 stubs for ia64/sparc64/powerpc. Tested on: i386, alpha, ia64. Compiled on sparc64 (a few days ago). Approved by: re
2002-10-25 19:10:58 +00:00
};
#endif
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
#endif /* !_MACHINE_UCONTEXT_H_ */
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