mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-29 00:15:32 +08:00
6c80c45e30
* Imported beans and serialization * Updated IA-64 port * Miscellaneous bug fixes From-SVN: r34028
283 lines
8.2 KiB
C
283 lines
8.2 KiB
C
/* Header file for unwinding stack frames for exception handling. */
|
|
/* Compile this one with gcc. */
|
|
/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
|
|
Contributed by Jason Merrill <jason@cygnus.com>.
|
|
|
|
This file is part of GNU CC.
|
|
|
|
GNU CC 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, or (at your option)
|
|
any later version.
|
|
|
|
GNU CC is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU CC; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
|
|
/* Number of hardware registers known to the compiler.
|
|
We have 128 general registers, 128 floating point registers, 64 predicate
|
|
registers, 8 branch registers, and one frame pointer register. */
|
|
|
|
/* ??? Should add ar.lc, ar.ec and probably also ar.pfs. */
|
|
|
|
#define FIRST_PSEUDO_REGISTER 330
|
|
|
|
#ifndef DWARF_FRAME_REGISTERS
|
|
#define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
|
|
#endif
|
|
|
|
typedef struct frame_state
|
|
{
|
|
void *cfa;
|
|
void *eh_ptr;
|
|
long cfa_offset;
|
|
long args_size;
|
|
long reg_or_offset[DWARF_FRAME_REGISTERS+1];
|
|
unsigned short cfa_reg;
|
|
unsigned short retaddr_column;
|
|
char saved[DWARF_FRAME_REGISTERS+1];
|
|
} frame_state;
|
|
|
|
/* Values for 'saved' above. */
|
|
#define REG_UNSAVED 0
|
|
#define REG_SAVED_OFFSET 1
|
|
#define REG_SAVED_REG 2
|
|
|
|
/* The representation for an "object" to be searched for frame unwind info.
|
|
For targets with named sections, one object is an executable or shared
|
|
library; for other targets, one object is one translation unit.
|
|
|
|
A copy of this structure declaration is printed by collect2.c;
|
|
keep the copies synchronized! */
|
|
|
|
struct object {
|
|
#ifdef IA64_UNWIND_INFO
|
|
void *pc_base; /* This field will be set by __do_frame_setup. */
|
|
#endif
|
|
void *pc_begin;
|
|
void *pc_end;
|
|
struct dwarf_fde *fde_begin;
|
|
struct dwarf_fde **fde_array;
|
|
size_t count;
|
|
struct object *next;
|
|
};
|
|
|
|
/* Called from __throw to find the registers to restore for a given
|
|
PC_TARGET. The caller should allocate a local variable of `struct
|
|
frame_state' (declared in frame.h) and pass its address to STATE_IN.
|
|
Returns NULL on failure, otherwise returns STATE_IN. */
|
|
|
|
extern struct frame_state *__frame_state_for (void *, struct frame_state *);
|
|
|
|
#ifdef IA64_UNWIND_INFO
|
|
|
|
/* This is the information required for unwind records in an ia64
|
|
object file. This is required by GAS and the compiler runtime. */
|
|
|
|
/* These are the starting point masks for the various types of
|
|
unwind records. To create a record of type R3 for instance, one
|
|
starts by using the value UNW_R3 and or-ing in any other required values.
|
|
These values are also unique (in context), so they can be used to identify
|
|
the various record types as well. UNW_Bx and some UNW_Px do have the
|
|
same value, but Px can only occur in a prologue context, and Bx in
|
|
a body context. */
|
|
|
|
#define UNW_R1 0x00
|
|
#define UNW_R2 0x40
|
|
#define UNW_R3 0x60
|
|
#define UNW_P1 0x80
|
|
#define UNW_P2 0xA0
|
|
#define UNW_P3 0xB0
|
|
#define UNW_P4 0xB8
|
|
#define UNW_P5 0xB9
|
|
#define UNW_P6 0xC0
|
|
#define UNW_P7 0xE0
|
|
#define UNW_P8 0xF0
|
|
#define UNW_P9 0xF1
|
|
#define UNW_P10 0xFF
|
|
#define UNW_X1 0xF9
|
|
#define UNW_X2 0xFA
|
|
#define UNW_X3 0xFB
|
|
#define UNW_X4 0xFC
|
|
#define UNW_B1 0x80
|
|
#define UNW_B2 0xC0
|
|
#define UNW_B3 0xE0
|
|
#define UNW_B4 0xF0
|
|
|
|
/* These are all the various types of unwind records. */
|
|
|
|
typedef enum
|
|
{
|
|
prologue, prologue_gr, body, mem_stack_f, mem_stack_v, psp_gr, psp_sprel,
|
|
rp_when, rp_gr, rp_br, rp_psprel, rp_sprel, pfs_when, pfs_gr, pfs_psprel,
|
|
pfs_sprel, preds_when, preds_gr, preds_psprel, preds_sprel,
|
|
fr_mem, frgr_mem, gr_gr, gr_mem, br_mem, br_gr, spill_base, spill_mask,
|
|
unat_when, unat_gr, unat_psprel, unat_sprel, lc_when, lc_gr, lc_psprel,
|
|
lc_sprel, fpsr_when, fpsr_gr, fpsr_psprel, fpsr_sprel,
|
|
priunat_when_gr, priunat_when_mem, priunat_gr, priunat_psprel,
|
|
priunat_sprel, bsp_when, bsp_gr, bsp_psprel, bsp_sprel, bspstore_when,
|
|
bspstore_gr, bspstore_psprel, bspstore_sprel, rnat_when, rnat_gr,
|
|
rnat_psprel, rnat_sprel, epilogue, label_state, copy_state,
|
|
spill_psprel, spill_sprel, spill_reg, spill_psprel_p, spill_sprel_p,
|
|
spill_reg_p
|
|
} unw_record_type;
|
|
|
|
|
|
/* These structures declare the fields that can be used in each of the
|
|
4 record formats, R, P, B and X. */
|
|
|
|
typedef struct unw_r_record
|
|
{
|
|
unsigned long rlen;
|
|
unsigned short mask;
|
|
unsigned short grsave;
|
|
} unw_r_record;
|
|
|
|
typedef struct unw_p_record
|
|
{
|
|
void *imask;
|
|
unsigned long t;
|
|
unsigned long size;
|
|
unsigned long spoff;
|
|
unsigned long br;
|
|
unsigned long pspoff;
|
|
unsigned short gr;
|
|
unsigned short rmask;
|
|
unsigned short grmask;
|
|
unsigned long frmask;
|
|
unsigned short brmask;
|
|
} unw_p_record;
|
|
|
|
typedef struct unw_b_record
|
|
{
|
|
unsigned long t;
|
|
unsigned long label;
|
|
unsigned short ecount;
|
|
} unw_b_record;
|
|
|
|
typedef struct unw_x_record
|
|
{
|
|
unsigned long t;
|
|
unsigned long spoff;
|
|
unsigned long pspoff;
|
|
unsigned short reg;
|
|
unsigned short treg;
|
|
unsigned short qp;
|
|
unsigned short xy; /* Value of the XY field.. */
|
|
} unw_x_record;
|
|
|
|
/* This structure is used to determine the specific record type and
|
|
its fields. */
|
|
typedef struct unwind_record
|
|
{
|
|
unw_record_type type;
|
|
union {
|
|
unw_r_record r;
|
|
unw_p_record p;
|
|
unw_b_record b;
|
|
unw_x_record x;
|
|
} record;
|
|
} unwind_record;
|
|
|
|
/* This structure represents the start of an unwind information pointer.
|
|
'unwind_descriptors' is the beginninng of the unwind descriptors, which
|
|
use up 'length' bytes of storage. */
|
|
|
|
typedef struct unwind_info_ptr
|
|
{
|
|
unsigned short version;
|
|
unsigned short flags;
|
|
unsigned int length;
|
|
unsigned char unwind_descriptors[1];
|
|
} unwind_info_ptr;
|
|
|
|
|
|
#define IA64_UNW_LOC_TYPE_NONE 0
|
|
#define IA64_UNW_LOC_TYPE_MEM 1
|
|
#define IA64_UNW_LOC_TYPE_GR 2
|
|
#define IA64_UNW_LOC_TYPE_FR 3
|
|
#define IA64_UNW_LOC_TYPE_BR 4
|
|
#define IA64_UNW_LOC_TYPE_SPOFF 5
|
|
#define IA64_UNW_LOC_TYPE_PSPOFF 6
|
|
#define IA64_UNW_LOC_TYPE_OFFSET 7
|
|
#define IA64_UNW_LOC_TYPE_SPILLBASE 8
|
|
|
|
typedef struct ia64_reg_loc
|
|
{
|
|
long when; /* PC relative offset from start of function. */
|
|
union { /* In memory or another register? */
|
|
void *mem;
|
|
int regno;
|
|
int offset;
|
|
} l;
|
|
short loc_type; /* Where to find value. */
|
|
short reg_size;
|
|
} ia64_reg_loc;
|
|
|
|
/* Frame information record. */
|
|
|
|
typedef struct ia64_frame_state
|
|
{
|
|
ia64_reg_loc gr[4]; /* gr4 to gr7. */
|
|
ia64_reg_loc fr[20]; /* fr2 to fr5, fr16 to fr31. */
|
|
ia64_reg_loc br[5]; /* br1 to br5. */
|
|
ia64_reg_loc rp;
|
|
ia64_reg_loc fpsr;
|
|
ia64_reg_loc bsp;
|
|
ia64_reg_loc bspstore;
|
|
ia64_reg_loc rnat;
|
|
ia64_reg_loc pfs;
|
|
ia64_reg_loc unat;
|
|
ia64_reg_loc lc;
|
|
ia64_reg_loc pr;
|
|
ia64_reg_loc priunat;
|
|
ia64_reg_loc sp;
|
|
ia64_reg_loc psp;
|
|
ia64_reg_loc spill_base;
|
|
void *my_sp;
|
|
void *my_bsp;
|
|
} ia64_frame_state;
|
|
|
|
|
|
extern unwind_info_ptr *build_ia64_frame_state (unsigned char *, ia64_frame_state *,
|
|
void *, void *);
|
|
extern void *get_real_reg_value (ia64_reg_loc *);
|
|
extern void *get_personality (unwind_info_ptr *);
|
|
extern void *get_except_table (unwind_info_ptr *);
|
|
extern void set_real_reg_value (ia64_reg_loc *, void *);
|
|
void *calc_caller_bsp (long, unsigned char *);
|
|
|
|
#endif /* IA64_UNWIND_INFO */
|
|
|
|
/* Note the following routines are exported interfaces from libgcc; do not
|
|
change these interfaces. Instead create new interfaces. Also note
|
|
references to these functions may be made weak in files where they
|
|
are referenced. */
|
|
|
|
extern void __register_frame (void * );
|
|
extern void __register_frame_table (void *);
|
|
extern void __deregister_frame (void *);
|
|
|
|
/* Called either from crtbegin.o or a static constructor to register the
|
|
unwind info for an object or translation unit, respectively. */
|
|
|
|
extern void __register_frame_info (void *, struct object *);
|
|
|
|
/* Similar, but BEGIN is actually a pointer to a table of unwind entries
|
|
for different translation units. Called from the file generated by
|
|
collect2. */
|
|
extern void __register_frame_info_table (void *, struct object *);
|
|
|
|
/* Called from crtend.o to deregister the unwind info for an object. */
|
|
|
|
extern void *__deregister_frame_info (void *);
|
|
|
|
|