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SPARC sys/ucontext.h namespace fixes (bug 21457).

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This patch fixes various miscellaneous namespace issues in the SPARC
sys/ucontext.h header.  These are similar to changes made previous to
other sys/ucontext.h headers, where the SPARC header was excluded from
those previous patches because of its complexity.

Tested for SPARC with build-many-glibcs.py.

	[BZ #21457]
	* sysdeps/unix/sysv/linux/sparc/sys/ucontext.h (__ctx): New macro.
	[__WORDSIZE == 64] (MC_TSTATE): Define only for [__USE_MISC].
	[__WORDSIZE == 64] (MC_PC): Likewise.
	[__WORDSIZE == 64] (MC_NPC): Likewise.
	[__WORDSIZE == 64] (MC_Y): Likewise.
	[__WORDSIZE == 64] (MC_G1): Likewise.
	[__WORDSIZE == 64] (MC_G2): Likewise.
	[__WORDSIZE == 64] (MC_G3): Likewise.
	[__WORDSIZE == 64] (MC_G4): Likewise.
	[__WORDSIZE == 64] (MC_G5): Likewise.
	[__WORDSIZE == 64] (MC_G6): Likewise.
	[__WORDSIZE == 64] (MC_G7): Likewise.
	[__WORDSIZE == 64] (MC_O0): Likewise.
	[__WORDSIZE == 64] (MC_O1): Likewise.
	[__WORDSIZE == 64] (MC_O2): Likewise.
	[__WORDSIZE == 64] (MC_O3): Likewise.
	[__WORDSIZE == 64] (MC_O4): Likewise.
	[__WORDSIZE == 64] (MC_O5): Likewise.
	[__WORDSIZE == 64] (MC_O6): Likewise.
	[__WORDSIZE == 64] (MC_O7): Likewise.
	[__WORDSIZE == 64] (MC_NGREG): Rename to __MC_NGREG and define to
	__MC_NGREG if [__USE_MISC].
	[__WORDSIZE == 64] (MC_MAXFPQ): Define only for [__USE_MISC].
	[__WORDSIZE == 64] (mc_gregset_t): Define using __MC_NGREG.
	[__WORDSIZE == 64] (struct mc_fq): Rename to struct __mc_fq.
	Define fields using __ctx.
	[__WORDSIZE == 64] (mc_fpu_t): Remove struct tag.  Define fields
	using __ctx.
	[__WORDSIZE == 64] (mcontext_t): Define fields using __ctx.
	(REG_PSR): Define only for [__USE_MISC].
	(REG_PC): Likewise.
	(REG_nPC): Likewise.
	(REG_Y): Likewise.
	(REG_G1): Likewise.
	(REG_G2): Likewise.
	(REG_G3): Likewise.
	(REG_G4): Likewise.
	(REG_G5): Likewise.
	(REG_G6): Likewise.
	(REG_G7): Likewise.
	(REG_O0): Likewise.
	(REG_O1): Likewise.
	(REG_O2): Likewise.
	(REG_O3): Likewise.
	(REG_O4): Likewise.
	(REG_O5): Likewise.
	(REG_O6): Likewise.
	(REG_O7): Likewise.
	[__WORDSIZE == 64] (REG_ASI): Define only for [__USE_MISC].
	[__WORDSIZE == 64] (REG_FPRS): Likewise.
	(NGREG): Rename to __NGREG and define to __NGREG if [__USE_MISC].
	(gregset_t): Define using __NGREG.
	(SPARC_MAXREGWINDOW): Rename to __SPARC_MAXREGWINDOW and define to
	__SPARC_MAXREGWINDOW if [__USE_MISC].
	(struct rwindow): Rename to struct __rwindow.  Define fields using
	__ctx.
	(rw_fp): Define only for [__USE_MISC].
	(rw_rtn): Likewise.
	(gwindows_t): Remove struct tag.  Define fields using __ctx and
	__SPARC_MAXREGWINDOW.
	(MAXFPQ): Define only for [__USE_MISC].
	(struct fpq): Rename to struct __fpq.  Define fields using __ctx.
	(struct fq): Rename to struct __fq.  Define fields using __ctx.
	(FPU_REGS_TYPE): Define only for [__USE_MISC].
	(FPU_DREGS_TYPE): Likewise.
	(V7_FPU_FSR_TYPE): Likewise.
	(V9_FPU_FSR_TYPE): Likewise.
	(V9_FPU_FPRS_TYPE): Likewise.
	[__WORDSIZE == 64] (fpregset_t): Remove struct tag.  Define fields
	using __ctx.
	[__WORDSIZE != 64] (fpregset_t): Likewise.
	[__WORDSIZE != 64] (xrs_t): Define fields using __ctx.
	[__WORDSIZE != 64] (XRS_ID): Define only for [__USE_MISC].
	[__WORDSIZE != 64] (mcontext_t): Define fields using __ctx.
	Rename field filler to __glibc_reserved1.
	* sysdeps/unix/sysv/linux/sparc/sparc32/ucontext_i.sym
	(MC_FILLER): Remove.
This commit is contained in:
Joseph Myers
2017-06-29 19:44:43 +00:00
parent 84d8c5bc8b
commit e78dc67889
4 changed files with 237 additions and 122 deletions
Download Patch File Download Diff File Expand all files Collapse all files

81
ChangeLog
View File

@@ -1,3 +1,84 @@
2017-06-29 Joseph Myers <joseph@codesourcery.com>
[BZ #21457]
* sysdeps/unix/sysv/linux/sparc/sys/ucontext.h (__ctx): New macro.
[__WORDSIZE == 64] (MC_TSTATE): Define only for [__USE_MISC].
[__WORDSIZE == 64] (MC_PC): Likewise.
[__WORDSIZE == 64] (MC_NPC): Likewise.
[__WORDSIZE == 64] (MC_Y): Likewise.
[__WORDSIZE == 64] (MC_G1): Likewise.
[__WORDSIZE == 64] (MC_G2): Likewise.
[__WORDSIZE == 64] (MC_G3): Likewise.
[__WORDSIZE == 64] (MC_G4): Likewise.
[__WORDSIZE == 64] (MC_G5): Likewise.
[__WORDSIZE == 64] (MC_G6): Likewise.
[__WORDSIZE == 64] (MC_G7): Likewise.
[__WORDSIZE == 64] (MC_O0): Likewise.
[__WORDSIZE == 64] (MC_O1): Likewise.
[__WORDSIZE == 64] (MC_O2): Likewise.
[__WORDSIZE == 64] (MC_O3): Likewise.
[__WORDSIZE == 64] (MC_O4): Likewise.
[__WORDSIZE == 64] (MC_O5): Likewise.
[__WORDSIZE == 64] (MC_O6): Likewise.
[__WORDSIZE == 64] (MC_O7): Likewise.
[__WORDSIZE == 64] (MC_NGREG): Rename to __MC_NGREG and define to
__MC_NGREG if [__USE_MISC].
[__WORDSIZE == 64] (MC_MAXFPQ): Define only for [__USE_MISC].
[__WORDSIZE == 64] (mc_gregset_t): Define using __MC_NGREG.
[__WORDSIZE == 64] (struct mc_fq): Rename to struct __mc_fq.
Define fields using __ctx.
[__WORDSIZE == 64] (mc_fpu_t): Remove struct tag. Define fields
using __ctx.
[__WORDSIZE == 64] (mcontext_t): Define fields using __ctx.
(REG_PSR): Define only for [__USE_MISC].
(REG_PC): Likewise.
(REG_nPC): Likewise.
(REG_Y): Likewise.
(REG_G1): Likewise.
(REG_G2): Likewise.
(REG_G3): Likewise.
(REG_G4): Likewise.
(REG_G5): Likewise.
(REG_G6): Likewise.
(REG_G7): Likewise.
(REG_O0): Likewise.
(REG_O1): Likewise.
(REG_O2): Likewise.
(REG_O3): Likewise.
(REG_O4): Likewise.
(REG_O5): Likewise.
(REG_O6): Likewise.
(REG_O7): Likewise.
[__WORDSIZE == 64] (REG_ASI): Define only for [__USE_MISC].
[__WORDSIZE == 64] (REG_FPRS): Likewise.
(NGREG): Rename to __NGREG and define to __NGREG if [__USE_MISC].
(gregset_t): Define using __NGREG.
(SPARC_MAXREGWINDOW): Rename to __SPARC_MAXREGWINDOW and define to
__SPARC_MAXREGWINDOW if [__USE_MISC].
(struct rwindow): Rename to struct __rwindow. Define fields using
__ctx.
(rw_fp): Define only for [__USE_MISC].
(rw_rtn): Likewise.
(gwindows_t): Remove struct tag. Define fields using __ctx and
__SPARC_MAXREGWINDOW.
(MAXFPQ): Define only for [__USE_MISC].
(struct fpq): Rename to struct __fpq. Define fields using __ctx.
(struct fq): Rename to struct __fq. Define fields using __ctx.
(FPU_REGS_TYPE): Define only for [__USE_MISC].
(FPU_DREGS_TYPE): Likewise.
(V7_FPU_FSR_TYPE): Likewise.
(V9_FPU_FSR_TYPE): Likewise.
(V9_FPU_FPRS_TYPE): Likewise.
[__WORDSIZE == 64] (fpregset_t): Remove struct tag. Define fields
using __ctx.
[__WORDSIZE != 64] (fpregset_t): Likewise.
[__WORDSIZE != 64] (xrs_t): Define fields using __ctx.
[__WORDSIZE != 64] (XRS_ID): Define only for [__USE_MISC].
[__WORDSIZE != 64] (mcontext_t): Define fields using __ctx.
Rename field filler to __glibc_reserved1.
* sysdeps/unix/sysv/linux/sparc/sparc32/ucontext_i.sym
(MC_FILLER): Remove.
2017-06-29 Florian Weimer <fweimer@redhat.com> 2017-06-29 Florian Weimer <fweimer@redhat.com>
* stdio-common/tst-vfprintf-user-type.c (my_printf_function): * stdio-common/tst-vfprintf-user-type.c (my_printf_function):

8
NEWS
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@@ -99,8 +99,12 @@ Version 2.26
* On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
longer has the name struct mcontext. This changes the C++ name mangling longer has the name struct mcontext. On SPARC GNU/Linux, the struct
for interfaces involving those types. mc_fq, struct rwindow, struct fpq and struct fq types are no longer
defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
fpregset_t type no longer has the name struct fpu. This changes the C++
name mangling for interfaces involving those types.
* The synchronization that pthread_spin_unlock performs has been changed * The synchronization that pthread_spin_unlock performs has been changed
to now be equivalent to a C11 atomic store with release memory order to to now be equivalent to a C11 atomic store with release memory order to

1
sysdeps/unix/sysv/linux/sparc/sparc32/ucontext_i.sym
View File

@@ -16,7 +16,6 @@ MC_GREGS offsetof (mcontext_t, gregs)
MC_GWINS offsetof (mcontext_t, gwins) MC_GWINS offsetof (mcontext_t, gwins)
MC_FPREGS offsetof (mcontext_t, fpregs) MC_FPREGS offsetof (mcontext_t, fpregs)
MC_XRS offsetof (mcontext_t, xrs) MC_XRS offsetof (mcontext_t, xrs)
MC_FILLER offsetof (mcontext_t, filler)
GREG_PSR (REG_PSR * sizeof(greg_t)) GREG_PSR (REG_PSR * sizeof(greg_t))
GREG_PC (REG_PC * sizeof(greg_t)) GREG_PC (REG_PC * sizeof(greg_t))
GREG_NPC (REG_nPC * sizeof(greg_t)) GREG_NPC (REG_nPC * sizeof(greg_t))

269
sysdeps/unix/sysv/linux/sparc/sys/ucontext.h
View File

@@ -27,59 +27,69 @@
#include <bits/wordsize.h> #include <bits/wordsize.h>
#ifdef __USE_MISC
# define __ctx(fld) fld
#else
# define __ctx(fld) __ ## fld
#endif
#if __WORDSIZE == 64 #if __WORDSIZE == 64
#define MC_TSTATE 0 #define __MC_NGREG 19
#define MC_PC 1 #ifdef __USE_MISC
#define MC_NPC 2 # define MC_TSTATE 0
#define MC_Y 3 # define MC_PC 1
#define MC_G1 4 # define MC_NPC 2
#define MC_G2 5 # define MC_Y 3
#define MC_G3 6 # define MC_G1 4
#define MC_G4 7 # define MC_G2 5
#define MC_G5 8 # define MC_G3 6
#define MC_G6 9 # define MC_G4 7
#define MC_G7 10 # define MC_G5 8
#define MC_O0 11 # define MC_G6 9
#define MC_O1 12 # define MC_G7 10
#define MC_O2 13 # define MC_O0 11
#define MC_O3 14 # define MC_O1 12
#define MC_O4 15 # define MC_O2 13
#define MC_O5 16 # define MC_O3 14
#define MC_O6 17 # define MC_O4 15
#define MC_O7 18 # define MC_O5 16
#define MC_NGREG 19 # define MC_O6 17
# define MC_O7 18
# define MC_NGREG __MC_NGREG
#endif
typedef unsigned long mc_greg_t; typedef unsigned long mc_greg_t;
typedef mc_greg_t mc_gregset_t[MC_NGREG]; typedef mc_greg_t mc_gregset_t[__MC_NGREG];
#define MC_MAXFPQ 16 #ifdef __USE_MISC
struct mc_fq { # define MC_MAXFPQ 16
unsigned long *mcfq_addr; #endif
unsigned int mcfq_insn; struct __mc_fq {
unsigned long *__ctx(mcfq_addr);
unsigned int __ctx(mcfq_insn);
}; };
struct mc_fpu {
union {
unsigned int sregs[32];
unsigned long dregs[32];
long double qregs[16];
} mcfpu_fregs;
unsigned long mcfpu_fsr;
unsigned long mcfpu_fprs;
unsigned long mcfpu_gsr;
struct mc_fq *mcfpu_fq;
unsigned char mcfpu_qcnt;
unsigned char mcfpu_qentsz;
unsigned char mcfpu_enab;
};
typedef struct mc_fpu mc_fpu_t;
typedef struct { typedef struct {
mc_gregset_t mc_gregs; union {
mc_greg_t mc_fp; unsigned int __ctx(sregs)[32];
mc_greg_t mc_i7; unsigned long __ctx(dregs)[32];
mc_fpu_t mc_fpregs; long double __ctx(qregs)[16];
} __ctx(mcfpu_fregs);
unsigned long __ctx(mcfpu_fsr);
unsigned long __ctx(mcfpu_fprs);
unsigned long __ctx(mcfpu_gsr);
struct __mc_fq *__ctx(mcfpu_fq);
unsigned char __ctx(mcfpu_qcnt);
unsigned char __ctx(mcfpu_qentsz);
unsigned char __ctx(mcfpu_enab);
} mc_fpu_t;
typedef struct {
mc_gregset_t __ctx(mc_gregs);
mc_greg_t __ctx(mc_fp);
mc_greg_t __ctx(mc_i7);
mc_fpu_t __ctx(mc_fpregs);
} mcontext_t; } mcontext_t;
typedef struct ucontext_t { typedef struct ucontext_t {
@@ -97,25 +107,27 @@ typedef struct ucontext_t {
* Location of the users' stored registers relative to R0. * Location of the users' stored registers relative to R0.
* Usage is as an index into a gregset_t array or as u.u_ar0[XX]. * Usage is as an index into a gregset_t array or as u.u_ar0[XX].
*/ */
#define REG_PSR (0) #ifdef __USE_MISC
#define REG_PC (1) # define REG_PSR (0)
#define REG_nPC (2) # define REG_PC (1)
#define REG_Y (3) # define REG_nPC (2)
#define REG_G1 (4) # define REG_Y (3)
#define REG_G2 (5) # define REG_G1 (4)
#define REG_G3 (6) # define REG_G2 (5)
#define REG_G4 (7) # define REG_G3 (6)
#define REG_G5 (8) # define REG_G4 (7)
#define REG_G6 (9) # define REG_G5 (8)
#define REG_G7 (10) # define REG_G6 (9)
#define REG_O0 (11) # define REG_G7 (10)
#define REG_O1 (12) # define REG_O0 (11)
#define REG_O2 (13) # define REG_O1 (12)
#define REG_O3 (14) # define REG_O2 (13)
#define REG_O4 (15) # define REG_O3 (14)
#define REG_O5 (16) # define REG_O4 (15)
#define REG_O6 (17) # define REG_O5 (16)
#define REG_O7 (18) # define REG_O6 (17)
# define REG_O7 (18)
#endif
/* /*
* A gregset_t is defined as an array type for compatibility with the reference * A gregset_t is defined as an array type for compatibility with the reference
@@ -128,20 +140,26 @@ typedef struct ucontext_t {
#if __WORDSIZE == 64 #if __WORDSIZE == 64
#define REG_ASI (19) # define __NGREG 21
#define REG_FPRS (20) # ifdef __USE_MISC
# define REG_ASI (19)
# define REG_FPRS (20)
#define NGREG 21 # define NGREG __NGREG
# endif
typedef long greg_t; typedef long greg_t;
#else /* __WORDSIZE == 32 */ #else /* __WORDSIZE == 32 */
#define NGREG 19 # define __NGREG 19
# ifdef __USE_MISC
# define NGREG __NGREG
# endif
typedef int greg_t; typedef int greg_t;
#endif /* __WORDSIZE == 32 */ #endif /* __WORDSIZE == 32 */
typedef greg_t gregset_t[NGREG]; typedef greg_t gregset_t[__NGREG];
/* /*
* The following structures define how a register window can appear on the * The following structures define how a register window can appear on the
@@ -150,28 +168,35 @@ typedef greg_t gregset_t[NGREG];
* maximum number of outstanding regiters window defined in the SPARC * maximum number of outstanding regiters window defined in the SPARC
* architecture (*not* implementation). * architecture (*not* implementation).
*/ */
#define SPARC_MAXREGWINDOW 31 /* max windows in SPARC arch. */ # define __SPARC_MAXREGWINDOW 31 /* max windows in SPARC arch. */
struct rwindow #ifdef __USE_MISC
# define SPARC_MAXREGWINDOW __SPARC_MAXREGWINDOW
#endif
struct __rwindow
{ {
greg_t rw_local[8]; /* locals */ greg_t __ctx(rw_local)[8]; /* locals */
greg_t rw_in[8]; /* ins */ greg_t __ctx(rw_in)[8]; /* ins */
}; };
#define rw_fp rw_in[6] /* frame pointer */ #ifdef __USE_MISC
#define rw_rtn rw_in[7] /* return address */ # define rw_fp __ctx(rw_in)[6] /* frame pointer */
# define rw_rtn __ctx(rw_in)[7] /* return address */
#endif
typedef struct gwindows typedef struct
{ {
int wbcnt; int __ctx(wbcnt);
int *spbuf[SPARC_MAXREGWINDOW]; int *__ctx(spbuf)[__SPARC_MAXREGWINDOW];
struct rwindow wbuf[SPARC_MAXREGWINDOW]; struct __rwindow __ctx(wbuf)[__SPARC_MAXREGWINDOW];
} gwindows_t; } gwindows_t;
/* /*
* Floating point definitions. * Floating point definitions.
*/ */
#define MAXFPQ 16 /* max # of fpu queue entries currently supported */ #ifdef __USE_MISC
# define MAXFPQ 16 /* max # of fpu queue entries currently supported */
#endif
/* /*
* struct fq defines the minimal format of a floating point instruction queue * struct fq defines the minimal format of a floating point instruction queue
@@ -180,56 +205,58 @@ typedef struct gwindows
* conformant system implementation. Any additional fields provided by an * conformant system implementation. Any additional fields provided by an
* implementation should not be used applications designed to be ABI conformant. */ * implementation should not be used applications designed to be ABI conformant. */
struct fpq struct __fpq
{ {
unsigned long *fpq_addr; /* address */ unsigned long *__ctx(fpq_addr); /* address */
unsigned long fpq_instr; /* instruction */ unsigned long __ctx(fpq_instr); /* instruction */
}; };
struct fq struct __fq
{ {
union /* FPU inst/addr queue */ union /* FPU inst/addr queue */
{ {
double whole; double __ctx(whole);
struct fpq fpq; struct __fpq __ctx(fpq);
} FQu; } __ctx(FQu);
}; };
#define FPU_REGS_TYPE unsigned #ifdef __USE_MISC
#define FPU_DREGS_TYPE unsigned long long # define FPU_REGS_TYPE unsigned
#define V7_FPU_FSR_TYPE unsigned # define FPU_DREGS_TYPE unsigned long long
#define V9_FPU_FSR_TYPE unsigned long long # define V7_FPU_FSR_TYPE unsigned
#define V9_FPU_FPRS_TYPE unsigned # define V9_FPU_FSR_TYPE unsigned long long
# define V9_FPU_FPRS_TYPE unsigned
#endif
#if __WORDSIZE == 64 #if __WORDSIZE == 64
typedef struct fpu typedef struct
{ {
union { /* FPU floating point regs */ union { /* FPU floating point regs */
unsigned fpu_regs[32]; /* 32 singles */ unsigned __ctx(fpu_regs)[32]; /* 32 singles */
double fpu_dregs[32]; /* 32 doubles */ double __ctx(fpu_dregs)[32]; /* 32 doubles */
long double fpu_qregs[16]; /* 16 quads */ long double __ctx(fpu_qregs)[16]; /* 16 quads */
} fpu_fr; } __ctx(fpu_fr);
struct fq *fpu_q; /* ptr to array of FQ entries */ struct __fq *__ctx(fpu_q); /* ptr to array of FQ entries */
unsigned long fpu_fsr; /* FPU status register */ unsigned long __ctx(fpu_fsr); /* FPU status register */
unsigned char fpu_qcnt; /* # of entries in saved FQ */ unsigned char __ctx(fpu_qcnt); /* # of entries in saved FQ */
unsigned char fpu_q_entrysize; /* # of bytes per FQ entry */ unsigned char __ctx(fpu_q_entrysize); /* # of bytes per FQ entry */
unsigned char fpu_en; /* flag signifying fpu in use */ unsigned char __ctx(fpu_en); /* flag signifying fpu in use */
} fpregset_t; } fpregset_t;
#else /* __WORDSIZE == 32 */ #else /* __WORDSIZE == 32 */
typedef struct fpu typedef struct
{ {
union { /* FPU floating point regs */ union { /* FPU floating point regs */
__extension__ unsigned long long fpu_regs[32]; /* 32 singles */ __extension__ unsigned long long __ctx(fpu_regs)[32]; /* 32 singles */
double fpu_dregs[16]; /* 16 doubles */ double __ctx(fpu_dregs)[16]; /* 16 doubles */
} fpu_fr; } __ctx(fpu_fr);
struct fq *fpu_q; /* ptr to array of FQ entries */ struct __fq *__ctx(fpu_q); /* ptr to array of FQ entries */
unsigned fpu_fsr; /* FPU status register */ unsigned __ctx(fpu_fsr); /* FPU status register */
unsigned char fpu_qcnt; /* # of entries in saved FQ */ unsigned char __ctx(fpu_qcnt); /* # of entries in saved FQ */
unsigned char fpu_q_entrysize; /* # of bytes per FQ entry */ unsigned char __ctx(fpu_q_entrysize); /* # of bytes per FQ entry */
unsigned char fpu_en; /* flag signifying fpu in use */ unsigned char __ctx(fpu_en); /* flag signifying fpu in use */
} fpregset_t; } fpregset_t;
/* /*
@@ -244,19 +271,23 @@ typedef struct fpu
*/ */
typedef struct typedef struct
{ {
unsigned int xrs_id; /* indicates xrs_ptr validity */ unsigned int __ctx(xrs_id); /* indicates xrs_ptr validity */
void * xrs_ptr; /* ptr to extra reg state */ void * __ctx(xrs_ptr); /* ptr to extra reg state */
} xrs_t; } xrs_t;
#define XRS_ID 0x78727300 /* the string "xrs" */ #ifdef __USE_MISC
# define XRS_ID 0x78727300 /* the string "xrs" */
#endif
typedef struct typedef struct
{ {
gregset_t gregs; /* general register set */ gregset_t __ctx(gregs); /* general register set */
gwindows_t *gwins; /* POSSIBLE pointer to register windows */ gwindows_t *__ctx(gwins); /* POSSIBLE pointer to register
fpregset_t fpregs; /* floating point register set */ windows */
xrs_t xrs; /* POSSIBLE extra register state association */ fpregset_t __ctx(fpregs); /* floating point register set */
long filler[19]; xrs_t __ctx(xrs); /* POSSIBLE extra register state
association */
long __glibc_reserved1[19];
} mcontext_t; } mcontext_t;