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| author | mini <mini@FreeBSD.org> | 2002-09-16 19:25:41 +0000 |
|---|---|---|
| committer | mini <mini@FreeBSD.org> | 2002-09-16 19:25:41 +0000 |
| commit | 62e41a5a7c826f21a8548bd3d7fcbc218809544e (patch) | |
| tree | f68cce90cf752f653302c6c5c0876070f6fff7ab /sys/i386/include/ucontext.h | |
| parent | d0ffcf396dc1f28a9d3e188b2dd0a72ad4838880 (diff) | |
| download | FreeBSD-src-62e41a5a7c826f21a8548bd3d7fcbc218809544e.zip FreeBSD-src-62e41a5a7c826f21a8548bd3d7fcbc218809544e.tar.gz | |
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
Diffstat (limited to 'sys/i386/include/ucontext.h')
| -rw-r--r-- | sys/i386/include/ucontext.h | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/sys/i386/include/ucontext.h b/sys/i386/include/ucontext.h index a84a2cb..1739818 100644 --- a/sys/i386/include/ucontext.h +++ b/sys/i386/include/ucontext.h @@ -58,11 +58,25 @@ typedef struct __mcontext { int mc_esp; /* machine state */ int mc_ss; - int mc_fpregs[28]; /* env87 + fpacc87 + u_long */ -#define __UC_MC_VALID 0x0001 /* mcontext register state is valid */ -#define __UC_FP_VALID 0x0002 /* FP registers have been saved */ - int mc_flags; - int __spare__[16]; + int mc_len; /* sizeof(mcontext_t) */ +#define _MC_FPFMT_NODEV 0 /* device not present or configured */ +#define _MC_FPFMT_387 1 +#define _MC_FPFMT_XMM 2 + int mc_fpformat; +#define _MC_FPOWNED_NONE 0 /* FP state not used */ +#define _MC_FPOWNED_FPU 1 /* FP state came from FPU */ +#define _MC_FPOWNED_PCB 2 /* 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 */ + int mc_spare2[8]; } mcontext_t; +#ifdef _KERNEL +struct thread; + +void get_mcontext(struct thread *td, mcontext_t *mcp); +int set_mcontext(struct thread *td, const mcontext_t *mcp); +#endif + #endif /* !_MACHINE_UCONTEXT_H_ */ |
