Please send comments on these patches to jimb@cygnus.com.

1999-10-28  Jim Blandy  <jimb@zenia.red-bean.com>

	* ptrace.h (enum __ptrace_request): Add new requests
	PTRACE_GETXFPREGS and PTRACE_SETXFPREGS, with aliases
	PT_GETXFPREGS and PT_SETXFPREGS.
	* user.h (struct user_xfpregs_struct): New structure.

*** ptrace.h.~1~	Mon Sep 20 04:12:55 1999
--- ptrace.h	Wed Oct 27 10:52:31 1999
***************
*** 99,106 ****
  #define PT_DETACH PTRACE_DETACH
  
    /* Continue and stop at the next (return from) syscall.  */
!   PTRACE_SYSCALL = 24
  #define PTRACE_SYSCALL PTRACE_SYSCALL
  };
  
  /* Perform process tracing functions.  REQUEST is one of the values
--- 99,122 ----
  #define PT_DETACH PTRACE_DETACH
  
    /* Continue and stop at the next (return from) syscall.  */
!   PTRACE_SYSCALL = 24,
  #define PTRACE_SYSCALL PTRACE_SYSCALL
+ 
+   /* Get all floating-point and SSE registers used by a process.  The
+      `data' argument should point to a `struct user_xfpregs_struct'.
+      This is not supported on all machines.  If your processor doesn't
+      have SSE registers, or your kernel doesn't support them, this
+      ptrace call will return ENOSYS.  */
+   PTRACE_GETXFPREGS = 25,
+ #define PT_GETXFPREGS PTRACE_GETXFPREGS
+ 
+   /* Set all floating-point and SSE registers used by a process.  The
+      `data' argument should point to a `struct user_xfpregs_struct'.
+      This is not supported on all machines.  If your processor doesn't
+      have SSE registers, or your kernel doesn't support them, this
+      ptrace call will return ENOSYS.  */
+   PTRACE_SETXFPREGS = 26
+ #define PT_SETXFPREGS PTRACE_SETXFPREGS
  };
  
  /* Perform process tracing functions.  REQUEST is one of the values
*** user.h.~1~	Mon Sep 20 04:12:55 1999
--- user.h	Tue Oct 26 16:47:39 1999
***************
*** 35,40 ****
--- 35,75 ----
    long st_space [20];
  };
  
+ 
+ struct user_xfpregs_struct
+ {
+   /* This structure contains two copies of the FPU's control
+      registers.  When changing a process's FP state with ptrace, put
+      the values you want in the first set --- cwd, swd, etc.  The
+      second set --- fxcwd, fxswd, etc. is ignored.  */
+   long cwd;
+   long swd;
+   long twd;
+   long fip;
+   long fcs;
+   long foo;
+   long fos;
+   long __padding;
+ 
+   /* Don't place values in the fx* control registers, here.  They're
+      ignored.  Use the members above instead.  */
+   unsigned short fxcwd;
+   unsigned short fxswd;
+   unsigned short fxtwd;
+   unsigned short fxfopcode;
+   long fxfip;
+   short fxfcs;
+   short __reserved_00;
+   long fxfoo;
+   short fxfos;
+   short __reserved_01;
+   long mxcsr;
+   long __reserved_02;
+   char st_space[8][16];       /* 8*16 bytes for each FP/MMX-reg = 128 bytes */
+   float xmm_space[8][4];      /* 8 XMM regs, holding 4 floats each */
+   long __reserved_03 [14*4];  /* 14 16-byte lines for remainder */
+ };
+ 
  struct user_regs_struct
  {
    long ebx;