mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-21 01:12:32 +08:00
536119a44c
The following generic warning message, which is printed whenever the
assembler skips generation of SFrame FDE, is not very helpful for the
user:
skipping SFrame FDE; CFI insn <name> (0x<hexval>)
Whenever possible print meaningful warning messages, when the assembler
skips generation of SFrame FDE:
- skipping SFrame FDE; non-SP/FP register <regno> in .cfi_def_cfa
- skipping SFrame FDE; non-SP/FP register <regno> in
.cfi_def_cfa_register
- skipping SFrame FDE; .cfi_def_cfa_offset without CFA base register
in effect
- skipping SFrame FDE; {FP|RA} register <regno> in .cfi_val_offset
- skipping SFrame FDE; {SP|FP|RA} register <regno> in in .cfi_register
- skipping SFrame FDE; .cfi_remember_state without prior SFrame FRE
state
- skipping SFrame FDE; non-default RA register <regno>
gas/
* gen-sframe.h (SFRAME_FRE_BASE_REG_INVAL): New macro for
invalid SFrame FRE CFA base register value of -1.
* gen-sframe.c: User readable warnings if SFrame FDE is not
generated.
gas/testsuite/
* gas/cfi-sframe/common-empty-1.d: Update generic SFrame test
case to updated warning message texts.
* gas/cfi-sframe/common-empty-2.d: Likewise.
* gas/cfi-sframe/common-empty-3.d: Likewise.
Signed-off-by: Jens Remus <jremus@linux.ibm.com>
160 lines
4.8 KiB
C
160 lines
4.8 KiB
C
/* gen-sframe.h - Support for generating SFrame.
|
|
Copyright (C) 2022-2024 Free Software Foundation, Inc.
|
|
|
|
This file is part of GAS, the GNU Assembler.
|
|
|
|
GAS 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 3, or (at your option)
|
|
any later version.
|
|
|
|
GAS 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 GAS; see the file COPYING. If not, write to the Free
|
|
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
|
|
02110-1301, USA. */
|
|
|
|
#ifndef GENSFRAME_H
|
|
#define GENSFRAME_H
|
|
|
|
#define SFRAME_FRE_ELEM_LOC_REG 0
|
|
#define SFRAME_FRE_ELEM_LOC_STACK 1
|
|
|
|
#define SFRAME_FRE_BASE_REG_INVAL ((unsigned int)-1)
|
|
|
|
/* SFrame Frame Row Entry (FRE).
|
|
|
|
A frame row entry is a slice of the frame and can be valid for a set of
|
|
program instructions. It keeps all information needed to retrieve the CFA
|
|
and the Return Address (RA) if tracked.
|
|
|
|
A frame row entry effectively stores accumulated information gathered by
|
|
interpreting multiple CFI instructions. More precisely, it is a
|
|
self-sufficient record in its own right. Only the subset of information
|
|
necessary for unwinding is stored: Given a PC, how to retrieve the CFA and
|
|
the RA.
|
|
*/
|
|
|
|
struct sframe_row_entry
|
|
{
|
|
/* A linked list. */
|
|
struct sframe_row_entry *next;
|
|
|
|
/* Start and end of the frame row entry. */
|
|
symbolS *pc_begin;
|
|
symbolS *pc_end;
|
|
|
|
/* A frame row entry is a merge candidate if new information can be updated
|
|
on it. */
|
|
bool merge_candidate;
|
|
|
|
/* Whether the return address is mangled with pauth code. */
|
|
bool mangled_ra_p;
|
|
|
|
/* Track CFA base (architectural) register ID. */
|
|
unsigned int cfa_base_reg;
|
|
/* Offset from the CFA base register for recovering CFA. */
|
|
offsetT cfa_offset;
|
|
|
|
/* Track the other register used as base register for CFA. Specify whether
|
|
it is in register or memory. */
|
|
unsigned int base_reg;
|
|
unsigned int bp_loc;
|
|
/* If the other register is stashed on stack, note the offset. */
|
|
offsetT bp_offset;
|
|
|
|
/* Track RA location. Specify whether it is in register or memory. */
|
|
unsigned int ra_loc;
|
|
/* If RA is stashed on stack, note the offset. */
|
|
offsetT ra_offset;
|
|
};
|
|
|
|
/* SFrame Function Description Entry. */
|
|
|
|
struct sframe_func_entry
|
|
{
|
|
/* A linked list. */
|
|
struct sframe_func_entry *next;
|
|
|
|
/* Reference to the FDE created from CFI in dw2gencfi. Some information
|
|
like the start_address and the segment is made available via this
|
|
member. */
|
|
const struct fde_entry *dw_fde;
|
|
|
|
/* Reference to the first FRE for this function. */
|
|
struct sframe_row_entry *sframe_fres;
|
|
|
|
unsigned int num_fres;
|
|
};
|
|
|
|
/* SFrame Function Description Entry Translation Context. */
|
|
|
|
struct sframe_xlate_ctx
|
|
{
|
|
/* Reference to the FDE created from CFI in dw2gencfi. Information
|
|
like the FDE start_address, end_address and the cfi insns are
|
|
made available via this member. */
|
|
const struct fde_entry *dw_fde;
|
|
|
|
/* List of FREs in the current FDE translation context, bounded by first_fre
|
|
and last_fre. */
|
|
|
|
/* Keep track of the first FRE for the purpose of restoring state if
|
|
necessary (for DW_CFA_restore). */
|
|
struct sframe_row_entry *first_fre;
|
|
/* The last FRE in the list. */
|
|
struct sframe_row_entry *last_fre;
|
|
|
|
/* The current FRE under construction. */
|
|
struct sframe_row_entry *cur_fre;
|
|
/* Remember FRE for an eventual restore. */
|
|
struct sframe_row_entry *remember_fre;
|
|
|
|
unsigned num_xlate_fres;
|
|
};
|
|
|
|
/* Error codes for SFrame translation context. */
|
|
enum sframe_xlate_err
|
|
{
|
|
/* Success. */
|
|
SFRAME_XLATE_OK = 0,
|
|
/* Error. */
|
|
SFRAME_XLATE_ERROR = 1,
|
|
/* Detailed error codes. */
|
|
SFRAME_XLATE_ERR_INVAL = -1,
|
|
SFRAME_XLATE_ERR_NOTREPRESENTED = -2,
|
|
};
|
|
|
|
/* Callback to create the abi/arch identifier for SFrame section. */
|
|
|
|
unsigned char
|
|
sframe_get_abi_arch_callback (const char *target_arch,
|
|
int big_endian_p);
|
|
|
|
/* The list of all FDEs with data in SFrame internal representation. */
|
|
|
|
extern struct sframe_func_entry *all_sframe_fdes;
|
|
|
|
/* SFrame version specific operations structure. */
|
|
|
|
struct sframe_version_ops
|
|
{
|
|
unsigned char format_version; /* SFrame format version. */
|
|
/* set SFrame FRE info. */
|
|
unsigned char (*set_fre_info) (unsigned int, unsigned int, unsigned int,
|
|
bool);
|
|
/* set SFrame Func info. */
|
|
unsigned char (*set_func_info) (unsigned int, unsigned int, unsigned int);
|
|
};
|
|
|
|
/* Generate SFrame stack trace info and prepare contents for the output.
|
|
outout_sframe () is called at the end of file. */
|
|
|
|
extern void output_sframe (segT sframe_seg);
|
|
|
|
#endif /* GENSFRAME_H */
|