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Align the FPU state in the ucontext and sigcontext to 16 bytes

Browse source 
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)
This commit is contained in:
Daniel Eischen 2002-12-02 19:58:55 +00:00
parent 33493b1820
commit a3dca4517e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=107521
11 changed files with 76 additions and 48 deletions
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3
sys/amd64/amd64/genassym.c
View file

@ -157,6 +157,9 @@ ASSYM(SIGF_HANDLER, offsetof(struct sigframe, sf_ahu.sf_handler));
ASSYM(SIGF_SC, offsetof(struct osigframe, sf_siginfo.si_sc));
#endif
ASSYM(SIGF_UC, offsetof(struct sigframe, sf_uc));
#ifdef COMPAT_FREEBSD4
ASSYM(SIGF_UC4, offsetof(struct sigframe4, sf_uc));
#endif
#ifdef COMPAT_43
ASSYM(SC_PS, offsetof(struct osigcontext, sc_ps));
ASSYM(SC_FS, offsetof(struct osigcontext, sc_fs));

24
sys/amd64/amd64/locore.S
View file

@ -394,32 +394,36 @@ begin:
* Signal trampoline, copied to top of user stack
*/
NON_GPROF_ENTRY(sigcode)
call *SIGF_HANDLER(%esp) /* call signal handler */
lea SIGF_UC(%esp),%eax /* get ucontext_t */
calll *SIGF_HANDLER(%esp)
leal SIGF_UC(%esp),%eax /* get ucontext */
pushl %eax
testl $PSL_VM,UC_EFLAGS(%eax)
jne 9f
jne 1f
movl UC_GS(%eax),%gs /* restore %gs */
9:
1:
movl $SYS_sigreturn,%eax
pushl %eax /* junk to fake return addr. */
int $0x80 /* enter kernel with args */
0: jmp 0b
/* on stack */
1:
jmp 1b
#ifdef COMPAT_FREEBSD4
ALIGN_TEXT
freebsd4_sigcode:
call *SIGF_HANDLER(%esp) /* call signal handler */
lea SIGF_UC(%esp),%eax /* get ucontext_t */
calll *SIGF_HANDLER(%esp)
leal SIGF_UC4(%esp),%eax /* get ucontext */
pushl %eax
testl $PSL_VM,UC4_EFLAGS(%eax)
jne 9f
jne 1f
movl UC4_GS(%eax),%gs /* restore %gs */
9:
1:
movl $344,%eax /* 4.x SYS_sigreturn */
pushl %eax /* junk to fake return addr. */
int $0x80 /* enter kernel with args */
0: jmp 0b
/* on stack */
1:
jmp 1b
#endif
#ifdef COMPAT_43

24
sys/amd64/amd64/locore.s
View file

@ -394,32 +394,36 @@ begin:
* Signal trampoline, copied to top of user stack
*/
NON_GPROF_ENTRY(sigcode)
call *SIGF_HANDLER(%esp) /* call signal handler */
lea SIGF_UC(%esp),%eax /* get ucontext_t */
calll *SIGF_HANDLER(%esp)
leal SIGF_UC(%esp),%eax /* get ucontext */
pushl %eax
testl $PSL_VM,UC_EFLAGS(%eax)
jne 9f
jne 1f
movl UC_GS(%eax),%gs /* restore %gs */
9:
1:
movl $SYS_sigreturn,%eax
pushl %eax /* junk to fake return addr. */
int $0x80 /* enter kernel with args */
0: jmp 0b
/* on stack */
1:
jmp 1b
#ifdef COMPAT_FREEBSD4
ALIGN_TEXT
freebsd4_sigcode:
call *SIGF_HANDLER(%esp) /* call signal handler */
lea SIGF_UC(%esp),%eax /* get ucontext_t */
calll *SIGF_HANDLER(%esp)
leal SIGF_UC4(%esp),%eax /* get ucontext */
pushl %eax
testl $PSL_VM,UC4_EFLAGS(%eax)
jne 9f
jne 1f
movl UC4_GS(%eax),%gs /* restore %gs */
9:
1:
movl $344,%eax /* 4.x SYS_sigreturn */
pushl %eax /* junk to fake return addr. */
int $0x80 /* enter kernel with args */
0: jmp 0b
/* on stack */
1:
jmp 1b
#endif
#ifdef COMPAT_43

9
sys/amd64/amd64/machdep.c
View file

@ -506,6 +506,7 @@ sendsig(catcher, sig, mask, code)
struct proc *p;
struct thread *td;
struct sigacts *psp;
char *sp;
struct trapframe *regs;
int oonstack;
@ -544,13 +545,15 @@ sendsig(catcher, sig, mask, code)
/* Allocate space for the signal handler context. */
if ((p->p_flag & P_ALTSTACK) != 0 && !oonstack &&
SIGISMEMBER(psp->ps_sigonstack, sig)) {
sfp = (struct sigframe *)(p->p_sigstk.ss_sp +
p->p_sigstk.ss_size - sizeof(struct sigframe));
sp = p->p_sigstk.ss_sp +
p->p_sigstk.ss_size - sizeof(struct sigframe);
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
p->p_sigstk.ss_flags |= SS_ONSTACK;
#endif
} else
sfp = (struct sigframe *)regs->tf_esp - 1;
sp = (char *)regs->tf_esp - sizeof(struct sigframe);
/* Align to 16 bytes. */
sfp = (struct sigframe *)((unsigned int)sp & ~0xF);
PROC_UNLOCK(p);
/* Translate the signal if appropriate. */

4
sys/amd64/include/signal.h
View file

@ -100,7 +100,7 @@ struct osigcontext {
struct sigcontext {
struct __sigset sc_mask; /* signal mask to restore */
int sc_onstack; /* sigstack state to restore */
int sc_gs; /* machine state (struct trapframe): */
int sc_gs; /* machine state (struct trapframe) */
int sc_fs;
int sc_es;
int sc_ds;
@ -127,7 +127,7 @@ struct sigcontext {
int sc_fpformat;
int sc_ownedfp;
int sc_spare1[1];
int sc_fpstate[128];
int sc_fpstate[128] __aligned(16);
int sc_spare2[8];
};

10
sys/amd64/include/ucontext.h
View file

@ -38,7 +38,7 @@ typedef struct __mcontext {
* and ucontext_t at the same time.
*/
int mc_onstack; /* XXX - sigcontext compat. */
int mc_gs; /* machine state (trapframe) */
int mc_gs; /* machine state (struct trapframe) */
int mc_fs;
int mc_es;
int mc_ds;
@ -68,15 +68,17 @@ typedef struct __mcontext {
#define _MC_FPOWNED_PCB 0x20002 /* FP state came from PCB */
int mc_ownedfp;
int mc_spare1[1]; /* align next field to 16 bytes */
int mc_fpstate[128]; /* must be multiple of 16 bytes */
/*
* See <machine/npx.h> for the internals of mc_fpstate[].
*/
int mc_fpstate[128] __aligned(16);
int mc_spare2[8];
} mcontext_t;
#if defined(_KERNEL) && defined(COMPAT_FREEBSD4)
/* For 4.x binaries */
struct mcontext4 {
int mc_onstack; /* XXX - sigcontext compat. */
int mc_gs;
int mc_gs; /* machine state (struct trapframe) */
int mc_fs;
int mc_es;
int mc_ds;

3
sys/i386/i386/genassym.c
View file

@ -157,6 +157,9 @@ ASSYM(SIGF_HANDLER, offsetof(struct sigframe, sf_ahu.sf_handler));
ASSYM(SIGF_SC, offsetof(struct osigframe, sf_siginfo.si_sc));
#endif
ASSYM(SIGF_UC, offsetof(struct sigframe, sf_uc));
#ifdef COMPAT_FREEBSD4
ASSYM(SIGF_UC4, offsetof(struct sigframe4, sf_uc));
#endif
#ifdef COMPAT_43
ASSYM(SC_PS, offsetof(struct osigcontext, sc_ps));
ASSYM(SC_FS, offsetof(struct osigcontext, sc_fs));

24
sys/i386/i386/locore.s
View file

@ -394,32 +394,36 @@ begin:
* Signal trampoline, copied to top of user stack
*/
NON_GPROF_ENTRY(sigcode)
call *SIGF_HANDLER(%esp) /* call signal handler */
lea SIGF_UC(%esp),%eax /* get ucontext_t */
calll *SIGF_HANDLER(%esp)
leal SIGF_UC(%esp),%eax /* get ucontext */
pushl %eax
testl $PSL_VM,UC_EFLAGS(%eax)
jne 9f
jne 1f
movl UC_GS(%eax),%gs /* restore %gs */
9:
1:
movl $SYS_sigreturn,%eax
pushl %eax /* junk to fake return addr. */
int $0x80 /* enter kernel with args */
0: jmp 0b
/* on stack */
1:
jmp 1b
#ifdef COMPAT_FREEBSD4
ALIGN_TEXT
freebsd4_sigcode:
call *SIGF_HANDLER(%esp) /* call signal handler */
lea SIGF_UC(%esp),%eax /* get ucontext_t */
calll *SIGF_HANDLER(%esp)
leal SIGF_UC4(%esp),%eax /* get ucontext */
pushl %eax
testl $PSL_VM,UC4_EFLAGS(%eax)
jne 9f
jne 1f
movl UC4_GS(%eax),%gs /* restore %gs */
9:
1:
movl $344,%eax /* 4.x SYS_sigreturn */
pushl %eax /* junk to fake return addr. */
int $0x80 /* enter kernel with args */
0: jmp 0b
/* on stack */
1:
jmp 1b
#endif
#ifdef COMPAT_43

9
sys/i386/i386/machdep.c
View file

@ -506,6 +506,7 @@ sendsig(catcher, sig, mask, code)
struct proc *p;
struct thread *td;
struct sigacts *psp;
char *sp;
struct trapframe *regs;
int oonstack;
@ -544,13 +545,15 @@ sendsig(catcher, sig, mask, code)
/* Allocate space for the signal handler context. */
if ((p->p_flag & P_ALTSTACK) != 0 && !oonstack &&
SIGISMEMBER(psp->ps_sigonstack, sig)) {
sfp = (struct sigframe *)(p->p_sigstk.ss_sp +
p->p_sigstk.ss_size - sizeof(struct sigframe));
sp = p->p_sigstk.ss_sp +
p->p_sigstk.ss_size - sizeof(struct sigframe);
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
p->p_sigstk.ss_flags |= SS_ONSTACK;
#endif
} else
sfp = (struct sigframe *)regs->tf_esp - 1;
sp = (char *)regs->tf_esp - sizeof(struct sigframe);
/* Align to 16 bytes. */
sfp = (struct sigframe *)((unsigned int)sp & ~0xF);
PROC_UNLOCK(p);
/* Translate the signal if appropriate. */

4
sys/i386/include/signal.h
View file

@ -100,7 +100,7 @@ struct osigcontext {
struct sigcontext {
struct __sigset sc_mask; /* signal mask to restore */
int sc_onstack; /* sigstack state to restore */
int sc_gs; /* machine state (struct trapframe): */
int sc_gs; /* machine state (struct trapframe) */
int sc_fs;
int sc_es;
int sc_ds;
@ -127,7 +127,7 @@ struct sigcontext {
int sc_fpformat;
int sc_ownedfp;
int sc_spare1[1];
int sc_fpstate[128];
int sc_fpstate[128] __aligned(16);
int sc_spare2[8];
};

10
sys/i386/include/ucontext.h
View file

@ -38,7 +38,7 @@ typedef struct __mcontext {
* and ucontext_t at the same time.
*/
int mc_onstack; /* XXX - sigcontext compat. */
int mc_gs; /* machine state (trapframe) */
int mc_gs; /* machine state (struct trapframe) */
int mc_fs;
int mc_es;
int mc_ds;
@ -68,15 +68,17 @@ typedef struct __mcontext {
#define _MC_FPOWNED_PCB 0x20002 /* FP state came from PCB */
int mc_ownedfp;
int mc_spare1[1]; /* align next field to 16 bytes */
int mc_fpstate[128]; /* must be multiple of 16 bytes */
/*
* See <machine/npx.h> for the internals of mc_fpstate[].
*/
int mc_fpstate[128] __aligned(16);
int mc_spare2[8];
} mcontext_t;
#if defined(_KERNEL) && defined(COMPAT_FREEBSD4)
/* For 4.x binaries */
struct mcontext4 {
int mc_onstack; /* XXX - sigcontext compat. */
int mc_gs;
int mc_gs; /* machine state (struct trapframe) */
int mc_fs;
int mc_es;
int mc_ds;