/* Common target dependent code for GDB on Alpha systems.
- Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2002 Free
- Software Foundation, Inc.
+ Copyright (C) 1993-2020 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef ALPHA_TDEP_H
#define ALPHA_TDEP_H
+struct regcache;
+
/* Say how long (ordinary) registers are. This is a piece of bogosity
- used in push_word and a few other places; REGISTER_RAW_SIZE is the
+ used in push_word and a few other places; register_size() is the
real way to know how big a register is. */
#define ALPHA_REGISTER_SIZE 8
/* Number of machine registers. */
-#define ALPHA_NUM_REGS 66
-
-/* Total amount of space needed to store our copies of the machine's
- register state. */
-#define ALPHA_REGISTER_BYTES (ALPHA_NUM_REGS * 8)
-
-/* Largest value REGISTER_RAW_SIZE can have. */
-#define ALPHA_MAX_REGISTER_RAW_SIZE 8
+#define ALPHA_NUM_REGS 67
-/* Largest value REGISTER_VIRTUAL_SIZE can have. */
-#define ALPHA_MAX_REGISTER_VIRTUAL_SIZE 8
-
-/* Register numbers of various important registers.
- Note that most of these values are "real" register numbers,
- and correspond to the general registers of the machine,
- and FP_REGNUM is a "phony" register number which is too large
- to be an actual register number as far as the user is concerned
- but serves to get the desired value when passed to read_register. */
+/* Register numbers of various important registers. Note that most of
+ these values are "real" register numbers, and correspond to the
+ general registers of the machine. */
#define ALPHA_V0_REGNUM 0 /* Function integer return value */
#define ALPHA_T7_REGNUM 8 /* Return address register for OSF/1 __add* */
+#define ALPHA_S0_REGNUM 9 /* First saved register */
#define ALPHA_GCC_FP_REGNUM 15 /* Used by gcc as frame register */
#define ALPHA_A0_REGNUM 16 /* Loc of first arg during a subr call */
#define ALPHA_T9_REGNUM 23 /* Return address register for OSF/1 __div* */
+#define ALPHA_RA_REGNUM 26 /* Contains return address value */
#define ALPHA_T12_REGNUM 27 /* Contains start addr of current proc */
+#define ALPHA_GP_REGNUM 29 /* Contains the global pointer */
#define ALPHA_SP_REGNUM 30 /* Contains address of top of stack */
-#define ALPHA_RA_REGNUM 26 /* Contains return address value */
#define ALPHA_ZERO_REGNUM 31 /* Read-only register, always 0 */
#define ALPHA_FP0_REGNUM 32 /* Floating point register 0 */
#define ALPHA_FPA0_REGNUM 48 /* First float arg during a subr call */
#define ALPHA_FPCR_REGNUM 63 /* Floating point control register */
#define ALPHA_PC_REGNUM 64 /* Contains program counter */
-#define ALPHA_FP_REGNUM 65 /* Virtual frame pointer */
+#define ALPHA_UNIQUE_REGNUM 66 /* PAL_rduniq value */
+
+/* Instruction size. */
+#define ALPHA_INSN_SIZE 4
/* The alpha has two different virtual pointers for arguments and locals.
The virtual argument pointer is pointing to the bottom of the argument
transfer area, which is located immediately below the virtual frame
- pointer. Its size is fixed for the native compiler, it is either zero
+ pointer. Its size is fixed for the native compiler, it is either zero
(for the no arguments case) or large enough to hold all argument registers.
- gcc uses a variable sized argument transfer area. As it has
+ gcc uses a variable sized argument transfer area. As it has
to stay compatible with the native debugging tools it has to use the same
virtual argument pointer and adjust the argument offsets accordingly.
pointer, the value of localoff is obtained from the PDR. */
#define ALPHA_NUM_ARG_REGS 6
-/* ABI variants that we know about. If you add to this enum, please
- update the table of names in alpha-tdep.c. */
-enum alpha_abi
-{
- ALPHA_ABI_UNKNOWN = 0,
- ALPHA_ABI_OSF1,
- ALPHA_ABI_LINUX,
- ALPHA_ABI_FREEBSD,
- ALPHA_ABI_NETBSD,
-
- ALPHA_ABI_INVALID /* Keep this last. */
-};
-
/* Target-dependent structure in gdbarch. */
struct gdbarch_tdep
{
- enum alpha_abi alpha_abi; /* OS/ABI of inferior. */
- const char *abi_name; /* Name of the above. */
-
- CORE_ADDR vm_min_address; /* used by heuristic_proc_start */
+ CORE_ADDR vm_min_address; /* Used by alpha_heuristic_proc_start. */
+
+ /* If PC is inside a dynamically-generated signal trampoline function
+ (i.e. one copied onto the user stack at run-time), return how many
+ bytes PC is beyond the start of that function. Otherwise, return -1. */
+ LONGEST (*dynamic_sigtramp_offset) (struct gdbarch *, CORE_ADDR);
+
+ /* Translate a signal handler stack base address into the address of
+ the sigcontext structure for that signal handler. */
+ CORE_ADDR (*sigcontext_addr) (struct frame_info *);
+
+ /* Does the PC fall in a signal trampoline. */
+ /* NOTE: cagney/2004-04-30: Do not copy/clone this code. Instead
+ look at tramp-frame.h and other simpler per-architecture
+ sigtramp unwinders. */
+ int (*pc_in_sigtramp) (struct gdbarch *gdbarch, CORE_ADDR pc,
+ const char *name);
+
+ /* If TYPE will be returned in memory, return true. */
+ int (*return_in_memory) (struct type *type);
+
+ /* Offset of registers in `struct sigcontext'. */
+ int sc_pc_offset;
+ int sc_regs_offset;
+ int sc_fpregs_offset;
+
+ int jb_pc; /* Offset to PC value in jump buffer.
+ If htis is negative, longjmp support
+ will be disabled. */
+ size_t jb_elt_size; /* And the size of each entry in the buf. */
};
-void alpha_gdbarch_register_os_abi (enum alpha_abi,
- void (*init_abi)(struct gdbarch_info,
- struct gdbarch *));
+extern unsigned int alpha_read_insn (struct gdbarch *gdbarch, CORE_ADDR pc);
+extern std::vector<CORE_ADDR> alpha_software_single_step
+ (struct regcache *regcache);
+extern CORE_ADDR alpha_after_prologue (CORE_ADDR pc);
+
+extern void alpha_mdebug_init_abi (struct gdbarch_info, struct gdbarch *);
+extern void alpha_dwarf2_init_abi (struct gdbarch_info, struct gdbarch *);
+
+extern void alpha_supply_int_regs (struct regcache *, int, const void *,
+ const void *, const void *);
+extern void alpha_fill_int_regs (const struct regcache *, int,
+ void *, void *, void *);
+extern void alpha_supply_fp_regs (struct regcache *, int,
+ const void *, const void *);
+extern void alpha_fill_fp_regs (const struct regcache *,
+ int, void *, void *);
#endif /* ALPHA_TDEP_H */
projects / deliverable / binutils-gdb.git / blobdiff