/* Definitions to target GDB to GNU/Linux on 386.
- Copyright 1992, 1993 Free Software Foundation, Inc.
+
+ Copyright 1992, 1993, 1995, 1996, 1998, 1999, 2000, 2001, 2002 Free
+ Software Foundation, Inc.
This file is part of GDB.
#define TM_LINUX_H
#define I386_GNULINUX_TARGET
-#define HAVE_I387_REGS
-#ifdef HAVE_PTRACE_GETXFPREGS
-#define HAVE_SSE_REGS
-#endif
#include "i386/tm-i386.h"
-#include "tm-linux.h"
-
-/* Size of sigcontext, from <asm/sigcontext.h>. */
-#define LINUX_SIGCONTEXT_SIZE (88)
-
-/* Offset to saved PC in sigcontext, from <asm/sigcontext.h>. */
-#define LINUX_SIGCONTEXT_PC_OFFSET (56)
-
-/* Offset to saved SP in sigcontext, from <asm/sigcontext.h>. */
-#define LINUX_SIGCONTEXT_SP_OFFSET (28)
-
-#define LOW_RETURN_REGNUM 0 /* holds low four bytes of result */
-#define HIGH_RETURN_REGNUM 2 /* holds high four bytes of result */
-
-/* This should probably move to tm-i386.h. */
-#define TARGET_LONG_DOUBLE_BIT 80
-
-#if defined(HAVE_LONG_DOUBLE) && defined(HOST_I386)
-/* The host and target are i386 machines and the compiler supports
- long doubles. Long doubles on the host therefore have the same
- layout as a 387 FPU stack register. */
-#define LD_I387
-
-extern int i387_extract_floating (PTR addr, int len, long double *dretptr);
-extern int i387_store_floating (PTR addr, int len, long double val);
-
-#define TARGET_EXTRACT_FLOATING i387_extract_floating
-#define TARGET_STORE_FLOATING i387_store_floating
-
-#define TARGET_ANALYZE_FLOATING \
- do \
- { \
- unsigned expon; \
- \
- low = extract_unsigned_integer (valaddr, 4); \
- high = extract_unsigned_integer (valaddr + 4, 4); \
- expon = extract_unsigned_integer (valaddr + 8, 2); \
- \
- nonnegative = ((expon & 0x8000) == 0); \
- is_nan = ((expon & 0x7fff) == 0x7fff) \
- && ((high & 0x80000000) == 0x80000000) \
- && (((high & 0x7fffffff) | low) != 0); \
- } \
- while (0)
-
-#undef REGISTER_CONVERT_TO_VIRTUAL
-#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
-{ \
- long double val = *((long double *)FROM); \
- store_floating ((TO), TYPE_LENGTH (TYPE), val); \
-}
-
-#undef REGISTER_CONVERT_TO_RAW
-#define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
-{ \
- long double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \
- *((long double *)TO) = val; \
-}
-
-/* Return the GDB type object for the "standard" data type
- of data in register N. */
-#undef REGISTER_VIRTUAL_TYPE
-#define REGISTER_VIRTUAL_TYPE(N) \
- (((N) == PC_REGNUM || (N) == FP_REGNUM || (N) == SP_REGNUM) \
- ? lookup_pointer_type (builtin_type_void) \
- : IS_FP_REGNUM(N) ? builtin_type_long_double \
- : IS_SSE_REGNUM(N) ? builtin_type_v4sf \
- : builtin_type_int)
-
-#endif
+#include "config/tm-linux.h"
/* The following works around a problem with /usr/include/sys/procfs.h */
#define sys_quotactl 1
-/* When the i386 Linux kernel calls a signal handler, the return
- address points to a bit of code on the stack. These definitions
- are used to identify this bit of code as a signal trampoline in
- order to support backtracing through calls to signal handlers. */
-
-#define I386_LINUX_SIGTRAMP
-#define IN_SIGTRAMP(pc, name) ((name) == NULL && i386_linux_sigtramp (pc))
-
-extern int i386_linux_sigtramp PARAMS ((CORE_ADDR));
-
-/* We need our own version of sigtramp_saved_pc to get the saved PC in
- a sigtramp routine. */
-
-#define sigtramp_saved_pc i386_linux_sigtramp_saved_pc
-extern CORE_ADDR i386_linux_sigtramp_saved_pc PARAMS ((struct frame_info *));
-
-/* Signal trampolines don't have a meaningful frame. As in tm-i386.h,
- the frame pointer value we use is actually the frame pointer of the
- calling frame--that is, the frame which was in progress when the
- signal trampoline was entered. gdb mostly treats this frame
- pointer value as a magic cookie. We detect the case of a signal
- trampoline by looking at the SIGNAL_HANDLER_CALLER field, which is
- set based on IN_SIGTRAMP.
-
- When a signal trampoline is invoked from a frameless function, we
- essentially have two frameless functions in a row. In this case,
- we use the same magic cookie for three frames in a row. We detect
- this case by seeing whether the next frame has
- SIGNAL_HANDLER_CALLER set, and, if it does, checking whether the
- current frame is actually frameless. In this case, we need to get
- the PC by looking at the SP register value stored in the signal
- context.
-
- This should work in most cases except in horrible situations where
- a signal occurs just as we enter a function but before the frame
- has been set up. */
-
-#define FRAMELESS_SIGNAL(FRAME) \
- ((FRAME)->next != NULL \
- && (FRAME)->next->signal_handler_caller \
- && frameless_look_for_prologue (FRAME))
-
-#undef FRAME_CHAIN
-#define FRAME_CHAIN(FRAME) \
- ((FRAME)->signal_handler_caller \
- ? (FRAME)->frame \
- : (FRAMELESS_SIGNAL (FRAME) \
- ? (FRAME)->frame \
- : (!inside_entry_file ((FRAME)->pc) \
- ? read_memory_integer ((FRAME)->frame, 4) \
- : 0)))
-
-#undef FRAME_SAVED_PC
-#define FRAME_SAVED_PC(FRAME) \
- ((FRAME)->signal_handler_caller \
- ? sigtramp_saved_pc (FRAME) \
- : (FRAMELESS_SIGNAL (FRAME) \
- ? read_memory_integer (i386_linux_sigtramp_saved_sp ((FRAME)->next), 4) \
- : read_memory_integer ((FRAME)->frame + 4, 4)))
-
-extern CORE_ADDR i386_linux_sigtramp_saved_sp PARAMS ((struct frame_info *));
-
/* When we call a function in a shared library, and the PLT sends us
into the dynamic linker to find the function's real address, we
need to skip over the dynamic linker call. This function decides
projects / deliverable / binutils-gdb.git / blobdiff