/* Dynamic architecture support for GDB, the GNU debugger.
- Copyright (C) 1998-2017 Free Software Foundation, Inc.
+ Copyright (C) 1998-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include <vector>
#include "frame.h"
#include "dis-asm.h"
+#include "gdb_obstack.h"
struct floatformat;
struct ui_file;
struct agent_expr;
struct axs_value;
struct stap_parse_info;
-struct parser_state;
+struct expr_builder;
struct ravenscar_arch_ops;
struct mem_range;
struct syscalls_info;
/* Callback type for regset section iterators. The callback usually
invokes the REGSET's supply or collect method, to which it must
- pass a buffer with at least the given SIZE. SECT_NAME is a BFD
- section name, and HUMAN_NAME is used for diagnostic messages.
- CB_DATA should have been passed unchanged through the iterator. */
+ pass a buffer - for collects this buffer will need to be created using
+ COLLECT_SIZE, for supply the existing buffer being read from should
+ be at least SUPPLY_SIZE. SECT_NAME is a BFD section name, and HUMAN_NAME
+ is used for diagnostic messages. CB_DATA should have been passed
+ unchanged through the iterator. */
typedef void (iterate_over_regset_sections_cb)
- (const char *sect_name, int size, const struct regset *regset,
- const char *human_name, void *cb_data);
+ (const char *sect_name, int supply_size, int collect_size,
+ const struct regset *regset, const char *human_name, void *cb_data);
+
+/* For a function call, does the function return a value using a
+ normal value return or a structure return - passing a hidden
+ argument pointing to storage. For the latter, there are two
+ cases: language-mandated structure return and target ABI
+ structure return. */
+
+enum function_call_return_method
+{
+ /* Standard value return. */
+ return_method_normal = 0,
+
+ /* Language ABI structure return. This is handled
+ by passing the return location as the first parameter to
+ the function, even preceding "this". */
+ return_method_hidden_param,
+
+ /* Target ABI struct return. This is target-specific; for instance,
+ on ia64 the first argument is passed in out0 but the hidden
+ structure return pointer would normally be passed in r8. */
+ return_method_struct,
+};
+
/* The following are pre-initialized by GDBARCH. */
/* The following are initialized by the target dependent code. */
-/* The bit byte-order has to do just with numbering of bits in debugging symbols
- and such. Conceptually, it's quite separate from byte/word byte order. */
-
-extern int gdbarch_bits_big_endian (struct gdbarch *gdbarch);
-extern void set_gdbarch_bits_big_endian (struct gdbarch *gdbarch, int bits_big_endian);
-
/* Number of bits in a short or unsigned short for the target machine. */
extern int gdbarch_short_bit (struct gdbarch *gdbarch);
extern int gdbarch_long_long_bit (struct gdbarch *gdbarch);
extern void set_gdbarch_long_long_bit (struct gdbarch *gdbarch, int long_long_bit);
-/* Alignment of a long long or unsigned long long for the target
- machine. */
-
-extern int gdbarch_long_long_align_bit (struct gdbarch *gdbarch);
-extern void set_gdbarch_long_long_align_bit (struct gdbarch *gdbarch, int long_long_align_bit);
-
/* The ABI default bit-size and format for "half", "float", "double", and
"long double". These bit/format pairs should eventually be combined
into a single object. For the moment, just initialize them as a pair.
extern int gdbarch_read_pc_p (struct gdbarch *gdbarch);
-typedef CORE_ADDR (gdbarch_read_pc_ftype) (struct regcache *regcache);
-extern CORE_ADDR gdbarch_read_pc (struct gdbarch *gdbarch, struct regcache *regcache);
+typedef CORE_ADDR (gdbarch_read_pc_ftype) (readable_regcache *regcache);
+extern CORE_ADDR gdbarch_read_pc (struct gdbarch *gdbarch, readable_regcache *regcache);
extern void set_gdbarch_read_pc (struct gdbarch *gdbarch, gdbarch_read_pc_ftype *read_pc);
extern int gdbarch_write_pc_p (struct gdbarch *gdbarch);
extern int gdbarch_pseudo_register_read_p (struct gdbarch *gdbarch);
-typedef enum register_status (gdbarch_pseudo_register_read_ftype) (struct gdbarch *gdbarch, struct regcache *regcache, int cookednum, gdb_byte *buf);
-extern enum register_status gdbarch_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache, int cookednum, gdb_byte *buf);
+typedef enum register_status (gdbarch_pseudo_register_read_ftype) (struct gdbarch *gdbarch, readable_regcache *regcache, int cookednum, gdb_byte *buf);
+extern enum register_status gdbarch_pseudo_register_read (struct gdbarch *gdbarch, readable_regcache *regcache, int cookednum, gdb_byte *buf);
extern void set_gdbarch_pseudo_register_read (struct gdbarch *gdbarch, gdbarch_pseudo_register_read_ftype *pseudo_register_read);
/* Read a register into a new struct value. If the register is wholly
extern int gdbarch_pseudo_register_read_value_p (struct gdbarch *gdbarch);
-typedef struct value * (gdbarch_pseudo_register_read_value_ftype) (struct gdbarch *gdbarch, struct regcache *regcache, int cookednum);
-extern struct value * gdbarch_pseudo_register_read_value (struct gdbarch *gdbarch, struct regcache *regcache, int cookednum);
+typedef struct value * (gdbarch_pseudo_register_read_value_ftype) (struct gdbarch *gdbarch, readable_regcache *regcache, int cookednum);
+extern struct value * gdbarch_pseudo_register_read_value (struct gdbarch *gdbarch, readable_regcache *regcache, int cookednum);
extern void set_gdbarch_pseudo_register_read_value (struct gdbarch *gdbarch, gdbarch_pseudo_register_read_value_ftype *pseudo_register_read_value);
extern int gdbarch_pseudo_register_write_p (struct gdbarch *gdbarch);
extern struct type * gdbarch_register_type (struct gdbarch *gdbarch, int reg_nr);
extern void set_gdbarch_register_type (struct gdbarch *gdbarch, gdbarch_register_type_ftype *register_type);
-extern int gdbarch_dummy_id_p (struct gdbarch *gdbarch);
+/* Generate a dummy frame_id for THIS_FRAME assuming that the frame is
+ a dummy frame. A dummy frame is created before an inferior call,
+ the frame_id returned here must match the frame_id that was built
+ for the inferior call. Usually this means the returned frame_id's
+ stack address should match the address returned by
+ gdbarch_push_dummy_call, and the returned frame_id's code address
+ should match the address at which the breakpoint was set in the dummy
+ frame. */
typedef struct frame_id (gdbarch_dummy_id_ftype) (struct gdbarch *gdbarch, struct frame_info *this_frame);
extern struct frame_id gdbarch_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame);
extern int gdbarch_push_dummy_call_p (struct gdbarch *gdbarch);
-typedef CORE_ADDR (gdbarch_push_dummy_call_ftype) (struct gdbarch *gdbarch, struct value *function, struct regcache *regcache, CORE_ADDR bp_addr, int nargs, struct value **args, CORE_ADDR sp, int struct_return, CORE_ADDR struct_addr);
-extern CORE_ADDR gdbarch_push_dummy_call (struct gdbarch *gdbarch, struct value *function, struct regcache *regcache, CORE_ADDR bp_addr, int nargs, struct value **args, CORE_ADDR sp, int struct_return, CORE_ADDR struct_addr);
+typedef CORE_ADDR (gdbarch_push_dummy_call_ftype) (struct gdbarch *gdbarch, struct value *function, struct regcache *regcache, CORE_ADDR bp_addr, int nargs, struct value **args, CORE_ADDR sp, function_call_return_method return_method, CORE_ADDR struct_addr);
+extern CORE_ADDR gdbarch_push_dummy_call (struct gdbarch *gdbarch, struct value *function, struct regcache *regcache, CORE_ADDR bp_addr, int nargs, struct value **args, CORE_ADDR sp, function_call_return_method return_method, CORE_ADDR struct_addr);
extern void set_gdbarch_push_dummy_call (struct gdbarch *gdbarch, gdbarch_push_dummy_call_ftype *push_dummy_call);
extern int gdbarch_call_dummy_location (struct gdbarch *gdbarch);
extern CORE_ADDR gdbarch_fetch_tls_load_module_address (struct gdbarch *gdbarch, struct objfile *objfile);
extern void set_gdbarch_fetch_tls_load_module_address (struct gdbarch *gdbarch, gdbarch_fetch_tls_load_module_address_ftype *fetch_tls_load_module_address);
+/* Return the thread-local address at OFFSET in the thread-local
+ storage for the thread PTID and the shared library or executable
+ file given by LM_ADDR. If that block of thread-local storage hasn't
+ been allocated yet, this function may throw an error. LM_ADDR may
+ be zero for statically linked multithreaded inferiors. */
+
+extern int gdbarch_get_thread_local_address_p (struct gdbarch *gdbarch);
+
+typedef CORE_ADDR (gdbarch_get_thread_local_address_ftype) (struct gdbarch *gdbarch, ptid_t ptid, CORE_ADDR lm_addr, CORE_ADDR offset);
+extern CORE_ADDR gdbarch_get_thread_local_address (struct gdbarch *gdbarch, ptid_t ptid, CORE_ADDR lm_addr, CORE_ADDR offset);
+extern void set_gdbarch_get_thread_local_address (struct gdbarch *gdbarch, gdbarch_get_thread_local_address_ftype *get_thread_local_address);
+
extern CORE_ADDR gdbarch_frame_args_skip (struct gdbarch *gdbarch);
extern void set_gdbarch_frame_args_skip (struct gdbarch *gdbarch, CORE_ADDR frame_args_skip);
-extern int gdbarch_unwind_pc_p (struct gdbarch *gdbarch);
-
typedef CORE_ADDR (gdbarch_unwind_pc_ftype) (struct gdbarch *gdbarch, struct frame_info *next_frame);
extern CORE_ADDR gdbarch_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame);
extern void set_gdbarch_unwind_pc (struct gdbarch *gdbarch, gdbarch_unwind_pc_ftype *unwind_pc);
-extern int gdbarch_unwind_sp_p (struct gdbarch *gdbarch);
-
typedef CORE_ADDR (gdbarch_unwind_sp_ftype) (struct gdbarch *gdbarch, struct frame_info *next_frame);
extern CORE_ADDR gdbarch_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame);
extern void set_gdbarch_unwind_sp (struct gdbarch *gdbarch, gdbarch_unwind_sp_ftype *unwind_sp);
extern CORE_ADDR gdbarch_addr_bits_remove (struct gdbarch *gdbarch, CORE_ADDR addr);
extern void set_gdbarch_addr_bits_remove (struct gdbarch *gdbarch, gdbarch_addr_bits_remove_ftype *addr_bits_remove);
+/* On some machines, not all bits of an address word are significant.
+ For example, on AArch64, the top bits of an address known as the "tag"
+ are ignored by the kernel, the hardware, etc. and can be regarded as
+ additional data associated with the address. */
+
+extern int gdbarch_significant_addr_bit (struct gdbarch *gdbarch);
+extern void set_gdbarch_significant_addr_bit (struct gdbarch *gdbarch, int significant_addr_bit);
+
/* FIXME/cagney/2001-01-18: This should be split in two. A target method that
indicates if the target needs software single step. An ISA method to
implement it.
extern int gdbarch_in_solib_return_trampoline (struct gdbarch *gdbarch, CORE_ADDR pc, const char *name);
extern void set_gdbarch_in_solib_return_trampoline (struct gdbarch *gdbarch, gdbarch_in_solib_return_trampoline_ftype *in_solib_return_trampoline);
+/* Return true if PC lies inside an indirect branch thunk. */
+
+typedef bool (gdbarch_in_indirect_branch_thunk_ftype) (struct gdbarch *gdbarch, CORE_ADDR pc);
+extern bool gdbarch_in_indirect_branch_thunk (struct gdbarch *gdbarch, CORE_ADDR pc);
+extern void set_gdbarch_in_indirect_branch_thunk (struct gdbarch *gdbarch, gdbarch_in_indirect_branch_thunk_ftype *in_indirect_branch_thunk);
+
/* A target might have problems with watchpoints as soon as the stack
frame of the current function has been destroyed. This mostly happens
as the first action in a function's epilogue. stack_frame_destroyed_p()
extern int gdbarch_cannot_step_breakpoint (struct gdbarch *gdbarch);
extern void set_gdbarch_cannot_step_breakpoint (struct gdbarch *gdbarch, int cannot_step_breakpoint);
+/* See comment in target.h about continuable, steppable and
+ non-steppable watchpoints. */
+
extern int gdbarch_have_nonsteppable_watchpoint (struct gdbarch *gdbarch);
extern void set_gdbarch_have_nonsteppable_watchpoint (struct gdbarch *gdbarch, int have_nonsteppable_watchpoint);
extern int gdbarch_core_pid_to_str_p (struct gdbarch *gdbarch);
-typedef const char * (gdbarch_core_pid_to_str_ftype) (struct gdbarch *gdbarch, ptid_t ptid);
-extern const char * gdbarch_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid);
+typedef std::string (gdbarch_core_pid_to_str_ftype) (struct gdbarch *gdbarch, ptid_t ptid);
+extern std::string gdbarch_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid);
extern void set_gdbarch_core_pid_to_str (struct gdbarch *gdbarch, gdbarch_core_pid_to_str_ftype *core_pid_to_str);
/* How the core target extracts the name of a thread from a core file. */
extern int gdbarch_get_syscall_number_p (struct gdbarch *gdbarch);
-typedef LONGEST (gdbarch_get_syscall_number_ftype) (struct gdbarch *gdbarch, ptid_t ptid);
-extern LONGEST gdbarch_get_syscall_number (struct gdbarch *gdbarch, ptid_t ptid);
+typedef LONGEST (gdbarch_get_syscall_number_ftype) (struct gdbarch *gdbarch, thread_info *thread);
+extern LONGEST gdbarch_get_syscall_number (struct gdbarch *gdbarch, thread_info *thread);
extern void set_gdbarch_get_syscall_number (struct gdbarch *gdbarch, gdbarch_get_syscall_number_ftype *get_syscall_number);
/* The filename of the XML syscall for this architecture. */
extern int gdbarch_stap_parse_special_token (struct gdbarch *gdbarch, struct stap_parse_info *p);
extern void set_gdbarch_stap_parse_special_token (struct gdbarch *gdbarch, gdbarch_stap_parse_special_token_ftype *stap_parse_special_token);
+/* Perform arch-dependent adjustments to a register name.
+
+ In very specific situations, it may be necessary for the register
+ name present in a SystemTap probe's argument to be handled in a
+ special way. For example, on i386, GCC may over-optimize the
+ register allocation and use smaller registers than necessary. In
+ such cases, the client that is reading and evaluating the SystemTap
+ probe (ourselves) will need to actually fetch values from the wider
+ version of the register in question.
+
+ To illustrate the example, consider the following probe argument
+ (i386):
+
+ 4@%ax
+
+ This argument says that its value can be found at the %ax register,
+ which is a 16-bit register. However, the argument's prefix says
+ that its type is "uint32_t", which is 32-bit in size. Therefore, in
+ this case, GDB should actually fetch the probe's value from register
+ %eax, not %ax. In this scenario, this function would actually
+ replace the register name from %ax to %eax.
+
+ The rationale for this can be found at PR breakpoints/24541. */
+
+extern int gdbarch_stap_adjust_register_p (struct gdbarch *gdbarch);
+
+typedef std::string (gdbarch_stap_adjust_register_ftype) (struct gdbarch *gdbarch, struct stap_parse_info *p, const std::string ®name, int regnum);
+extern std::string gdbarch_stap_adjust_register (struct gdbarch *gdbarch, struct stap_parse_info *p, const std::string ®name, int regnum);
+extern void set_gdbarch_stap_adjust_register (struct gdbarch *gdbarch, gdbarch_stap_adjust_register_ftype *stap_adjust_register);
+
/* DTrace related functions.
The expression to compute the NARTGth+1 argument to a DTrace USDT probe.
NARG must be >= 0. */
extern int gdbarch_dtrace_parse_probe_argument_p (struct gdbarch *gdbarch);
-typedef void (gdbarch_dtrace_parse_probe_argument_ftype) (struct gdbarch *gdbarch, struct parser_state *pstate, int narg);
-extern void gdbarch_dtrace_parse_probe_argument (struct gdbarch *gdbarch, struct parser_state *pstate, int narg);
+typedef void (gdbarch_dtrace_parse_probe_argument_ftype) (struct gdbarch *gdbarch, struct expr_builder *builder, int narg);
+extern void gdbarch_dtrace_parse_probe_argument (struct gdbarch *gdbarch, struct expr_builder *builder, int narg);
extern void set_gdbarch_dtrace_parse_probe_argument (struct gdbarch *gdbarch, gdbarch_dtrace_parse_probe_argument_ftype *dtrace_parse_probe_argument);
/* True if the given ADDR does not contain the instruction sequence
/* True if a fast tracepoint can be set at an address. */
-typedef int (gdbarch_fast_tracepoint_valid_at_ftype) (struct gdbarch *gdbarch, CORE_ADDR addr, char **msg);
-extern int gdbarch_fast_tracepoint_valid_at (struct gdbarch *gdbarch, CORE_ADDR addr, char **msg);
+typedef int (gdbarch_fast_tracepoint_valid_at_ftype) (struct gdbarch *gdbarch, CORE_ADDR addr, std::string *msg);
+extern int gdbarch_fast_tracepoint_valid_at (struct gdbarch *gdbarch, CORE_ADDR addr, std::string *msg);
extern void set_gdbarch_fast_tracepoint_valid_at (struct gdbarch *gdbarch, gdbarch_fast_tracepoint_valid_at_ftype *fast_tracepoint_valid_at);
/* Guess register state based on tracepoint location. Used for tracepoints
/* Return string (caller has to use xfree for it) with options for GCC
to produce code for this target, typically "-m64", "-m32" or "-m31".
These options are put before CU's DW_AT_producer compilation options so that
- they can override it. Method may also return NULL. */
+ they can override it. */
-typedef char * (gdbarch_gcc_target_options_ftype) (struct gdbarch *gdbarch);
-extern char * gdbarch_gcc_target_options (struct gdbarch *gdbarch);
+typedef std::string (gdbarch_gcc_target_options_ftype) (struct gdbarch *gdbarch);
+extern std::string gdbarch_gcc_target_options (struct gdbarch *gdbarch);
extern void set_gdbarch_gcc_target_options (struct gdbarch *gdbarch, gdbarch_gcc_target_options_ftype *gcc_target_options);
/* Return a regular expression that matches names used by this
/* Functions for allowing a target to modify its disassembler options. */
+extern const char * gdbarch_disassembler_options_implicit (struct gdbarch *gdbarch);
+extern void set_gdbarch_disassembler_options_implicit (struct gdbarch *gdbarch, const char * disassembler_options_implicit);
+
extern char ** gdbarch_disassembler_options (struct gdbarch *gdbarch);
extern void set_gdbarch_disassembler_options (struct gdbarch *gdbarch, char ** disassembler_options);
-extern const disasm_options_t * gdbarch_valid_disassembler_options (struct gdbarch *gdbarch);
-extern void set_gdbarch_valid_disassembler_options (struct gdbarch *gdbarch, const disasm_options_t * valid_disassembler_options);
+extern const disasm_options_and_args_t * gdbarch_valid_disassembler_options (struct gdbarch *gdbarch);
+extern void set_gdbarch_valid_disassembler_options (struct gdbarch *gdbarch, const disasm_options_and_args_t * valid_disassembler_options);
+
+/* Type alignment override method. Return the architecture specific
+ alignment required for TYPE. If there is no special handling
+ required for TYPE then return the value 0, GDB will then apply the
+ default rules as laid out in gdbtypes.c:type_align. */
+
+typedef ULONGEST (gdbarch_type_align_ftype) (struct gdbarch *gdbarch, struct type *type);
+extern ULONGEST gdbarch_type_align (struct gdbarch *gdbarch, struct type *type);
+extern void set_gdbarch_type_align (struct gdbarch *gdbarch, gdbarch_type_align_ftype *type_align);
-/* Definition for an unknown syscall, used basically in error-cases. */
-#define UNKNOWN_SYSCALL (-1)
+/* Return a string containing any flags for the given PC in the given FRAME. */
+
+typedef std::string (gdbarch_get_pc_address_flags_ftype) (frame_info *frame, CORE_ADDR pc);
+extern std::string gdbarch_get_pc_address_flags (struct gdbarch *gdbarch, frame_info *frame, CORE_ADDR pc);
+extern void set_gdbarch_get_pc_address_flags (struct gdbarch *gdbarch, gdbarch_get_pc_address_flags_ftype *get_pc_address_flags);
extern struct gdbarch_tdep *gdbarch_tdep (struct gdbarch *gdbarch);
extern void gdbarch_free (struct gdbarch *);
+/* Get the obstack owned by ARCH. */
+
+extern obstack *gdbarch_obstack (gdbarch *arch);
/* Helper function. Allocate memory from the ``struct gdbarch''
obstack. The memory is freed when the corresponding architecture
is also freed. */
-extern void *gdbarch_obstack_zalloc (struct gdbarch *gdbarch, long size);
-#define GDBARCH_OBSTACK_CALLOC(GDBARCH, NR, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), (NR) * sizeof (TYPE)))
-#define GDBARCH_OBSTACK_ZALLOC(GDBARCH, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), sizeof (TYPE)))
+#define GDBARCH_OBSTACK_CALLOC(GDBARCH, NR, TYPE) obstack_calloc<TYPE> (gdbarch_obstack ((GDBARCH)), (NR))
+
+#define GDBARCH_OBSTACK_ZALLOC(GDBARCH, TYPE) obstack_zalloc<TYPE> (gdbarch_obstack ((GDBARCH)))
/* Duplicate STRING, returning an equivalent string that's allocated on the
obstack associated with GDBARCH. The string is freed when the corresponding
extern void gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file);
+/* Return the number of cooked registers (raw + pseudo) for ARCH. */
+
+static inline int
+gdbarch_num_cooked_regs (gdbarch *arch)
+{
+ return gdbarch_num_regs (arch) + gdbarch_num_pseudo_regs (arch);
+}
+
#endif
projects / deliverable / binutils-gdb.git / blobdiff