litmus-rt.git - The LITMUS^RT kernel.

The LITMUS^RT kernel.

Bjoern Brandenburg

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	Commit message (Expand)	Author	Age
*	myri_sbus: use request_firmware	Jaswinder Singh Rajput	2009-04-04

/* * Pentium III FXSR, SSE support * Gareth Hughes <gareth@valinux.com>, May 2000 * * Provide support for the GDB 5.0+ PTRACE_{GET|SET}FPXREGS requests for * interacting with the FXSR-format floating point environment. Floating * point data can be accessed in the regular format in the usual manner, * and both the standard and SIMD floating point data can be accessed via * the new ptrace requests. In either case, changes to the FPU environment * will be reflected in the task's state as expected. */ struct user_i387_struct { long cwd; long swd; long twd; long fip; long fcs; long foo; long fos; long st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */ }; struct user_fxsr_struct { unsigned short cwd; unsigned short swd; unsigned short twd; unsigned short fop; long fip; long fcs; long foo; long fos; long mxcsr; long reserved; long st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ long xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ long padding[56]; }; /* * This is the old layout of "struct pt_regs", and * is still the layout used by user mode (the new * pt_regs doesn't have all registers as the kernel * doesn't use the extra segment registers) */ struct user_regs_struct { long ebx, ecx, edx, esi, edi, ebp, eax; unsigned short ds, __ds, es, __es; unsigned short fs, __fs, gs, __gs; long orig_eax, eip; unsigned short cs, __cs; long eflags, esp; unsigned short ss, __ss; }; /* When the kernel dumps core, it starts by dumping the user struct - this will be used by gdb to figure out where the data and stack segments are within the file, and what virtual addresses to use. */ struct user{ /* We start with the registers, to mimic the way that "memory" is returned from the ptrace(3,...) function. */ struct user_regs_struct regs; /* Where the registers are actually stored */ /* ptrace does not yet supply these. Someday.... */ int u_fpvalid; /* True if math co-processor being used. */ /* for this mess. Not yet used. */ struct user_i387_struct i387; /* Math Co-processor registers. */ /* The rest of this junk is to help gdb figure out what goes where */ unsigned long int u_tsize; /* Text segment size (pages). */ unsigned long int u_dsize; /* Data segment size (pages). */ unsigned long int u_ssize; /* Stack segment size (pages). */ unsigned long start_code; /* Starting virtual address of text. */ unsigned long start_stack; /* Starting virtual address of stack area. This is actually the bottom of the stack, the top of the stack is always found in the esp register. */ long int signal; /* Signal that caused the core dump. */ int reserved; /* No longer used */ struct user_pt_regs * u_ar0; /* Used by gdb to help find the values for */ /* the registers. */ struct user_i387_struct* u_fpstate; /* Math Co-processor pointer. */ unsigned long magic; /* To uniquely identify a core file */ char u_comm[32]; /* User command that was responsible */ int u_debugreg[8]; }; #define NBPG PAGE_SIZE #define UPAGES 1 #define HOST_TEXT_START_ADDR (u.start_code) #define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG) #endif /* _I386_USER_H */