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/* sframe-dump.c - Textual dump of .sframe.
Copyright (C) 2022-2024 Free Software Foundation, Inc.
This file is part of libsframe.
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 3 of the License, or
(at your option) any later version.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include "sframe-impl.h"
#define SFRAME_HEADER_FLAGS_STR_MAX_LEN 50
/* Return TRUE if the SFrame section is associated with the aarch64 ABIs. */
static bool
is_sframe_abi_arch_aarch64 (sframe_decoder_ctx *sfd_ctx)
{
bool aarch64_p = false;
uint8_t abi_arch = sframe_decoder_get_abi_arch (sfd_ctx);
if (abi_arch == SFRAME_ABI_AARCH64_ENDIAN_BIG
|| abi_arch == SFRAME_ABI_AARCH64_ENDIAN_LITTLE)
aarch64_p = true;
return aarch64_p;
}
static void
dump_sframe_header (sframe_decoder_ctx *sfd_ctx)
{
uint8_t ver;
uint8_t flags;
char *flags_str;
const char *ver_str = NULL;
int8_t cfa_fixed_fp_offset;
int8_t cfa_fixed_ra_offset;
const sframe_header *header = &(sfd_ctx->sfd_header);
/* Prepare SFrame section version string. */
const char *version_names[]
= { "NULL",
"SFRAME_VERSION_1",
"SFRAME_VERSION_2" };
/* PS: Keep SFRAME_HEADER_FLAGS_STR_MAX_LEN in sync if adding more members to
this array. */
const char *flag_names[]
= { "SFRAME_F_FDE_SORTED",
"SFRAME_F_FRAME_POINTER" };
ver = sframe_decoder_get_version (sfd_ctx);
if (ver <= SFRAME_VERSION)
ver_str = version_names[ver];
/* Prepare SFrame section flags string. */
flags = header->sfh_preamble.sfp_flags;
flags_str = (char*) calloc (SFRAME_HEADER_FLAGS_STR_MAX_LEN, sizeof (char));
if (flags)
{
if (flags & SFRAME_F_FDE_SORTED)
strcpy (flags_str, flag_names[0]);
if (flags & SFRAME_F_FRAME_POINTER)
{
if (strlen (flags_str) > 0)
strcpy (flags_str, ",");
strcpy (flags_str, flag_names[1]);
}
}
else
strcpy (flags_str, "NONE");
/* CFA fixed FP and RA offsets. */
cfa_fixed_fp_offset = header->sfh_cfa_fixed_fp_offset;
cfa_fixed_ra_offset = header->sfh_cfa_fixed_ra_offset;
const char* subsec_name = "Header";
printf ("\n");
printf (" %s :\n", subsec_name);
printf ("\n");
printf (" Version: %s\n", ver_str);
printf (" Flags: %s\n", flags_str);
if (cfa_fixed_fp_offset != SFRAME_CFA_FIXED_FP_INVALID)
printf (" CFA fixed FP offset: %d\n", cfa_fixed_fp_offset);
if (cfa_fixed_ra_offset != SFRAME_CFA_FIXED_RA_INVALID)
printf (" CFA fixed RA offset: %d\n", cfa_fixed_ra_offset);
printf (" Num FDEs: %d\n", sframe_decoder_get_num_fidx (sfd_ctx));
printf (" Num FREs: %d\n", header->sfh_num_fres);
free (flags_str);
}
static void
dump_sframe_func_with_fres (sframe_decoder_ctx *sfd_ctx,
unsigned int funcidx,
uint64_t sec_addr)
{
uint32_t j = 0;
uint32_t num_fres = 0;
uint32_t func_size = 0;
int32_t func_start_address = 0;
unsigned char func_info = 0;
uint64_t func_start_pc_vma = 0;
uint64_t fre_start_pc_vma = 0;
const char *base_reg_str[] = {"fp", "sp"};
int32_t cfa_offset = 0;
int32_t fp_offset = 0;
int32_t ra_offset = 0;
uint8_t base_reg_id = 0;
int err[3] = {0, 0, 0};
sframe_frame_row_entry fre;
/* Get the SFrame function descriptor. */
sframe_decoder_get_funcdesc (sfd_ctx, funcidx, &num_fres,
&func_size, &func_start_address, &func_info);
/* Calculate the virtual memory address for function start pc. */
func_start_pc_vma = func_start_address + sec_addr;
/* Mark FDEs with [m] where the FRE start address is interpreted as a
mask. */
int fde_type_addrmask_p = (SFRAME_V1_FUNC_FDE_TYPE (func_info)
== SFRAME_FDE_TYPE_PCMASK);
const char *fde_type_marker
= (fde_type_addrmask_p ? "[m]" : " ");
printf ("\n func idx [%d]: pc = 0x%"PRIx64 ", size = %d bytes",
funcidx,
func_start_pc_vma,
func_size);
if (is_sframe_abi_arch_aarch64 (sfd_ctx)
&& (SFRAME_V1_FUNC_PAUTH_KEY (func_info) == SFRAME_AARCH64_PAUTH_KEY_B))
printf (", pauth = B key");
char temp[100];
printf ("\n %-7s%-8s %-10s%-10s%-13s",
"STARTPC", fde_type_marker, "CFA", "FP", "RA");
for (j = 0; j < num_fres; j++)
{
sframe_decoder_get_fre (sfd_ctx, funcidx, j, &fre);
fre_start_pc_vma = (fde_type_addrmask_p
? fre.fre_start_addr
: func_start_pc_vma + fre.fre_start_addr);
/* FIXME - fixup the err caching in array.
assert no error for base reg id. */
base_reg_id = sframe_fre_get_base_reg_id (&fre, &err[0]);
cfa_offset = sframe_fre_get_cfa_offset (sfd_ctx, &fre, &err[0]);
fp_offset = sframe_fre_get_fp_offset (sfd_ctx, &fre, &err[1]);
ra_offset = sframe_fre_get_ra_offset (sfd_ctx, &fre, &err[2]);
/* Dump CFA info. */
printf ("\n");
printf (" %016"PRIx64, fre_start_pc_vma);
sprintf (temp, "%s+%d", base_reg_str[base_reg_id], cfa_offset);
printf (" %-10s", temp);
/* Dump SP/FP info. */
if (err[1] == 0)
sprintf (temp, "c%+d", fp_offset);
else
strcpy (temp, "u");
printf ("%-10s", temp);
/* Dump RA info.
If an ABI does not track RA offset, e.g., AMD64, display 'f',
else display the offset d as 'c+-d'. */
if (sframe_decoder_get_fixed_ra_offset (sfd_ctx)
!= SFRAME_CFA_FIXED_RA_INVALID)
strcpy (temp, "f");
else if (err[2] == 0)
sprintf (temp, "c%+d", ra_offset);
else
strcpy (temp, "u");
/* Mark SFrame FRE's RA information with "[s]" if the RA is mangled
with signature bits. */
const char *ra_mangled_p_str
= ((sframe_fre_get_ra_mangled_p (sfd_ctx, &fre, &err[2]))
? "[s]" : " ");
strcat (temp, ra_mangled_p_str);
printf ("%-13s", temp);
}
}
static void
dump_sframe_functions (sframe_decoder_ctx *sfd_ctx, uint64_t sec_addr)
{
uint32_t i;
uint32_t num_fdes;
const char* subsec_name = "Function Index";
printf ("\n %s :\n", subsec_name);
num_fdes = sframe_decoder_get_num_fidx (sfd_ctx);
for (i = 0; i < num_fdes; i++)
{
dump_sframe_func_with_fres (sfd_ctx, i, sec_addr);
printf ("\n");
}
}
void
dump_sframe (sframe_decoder_ctx *sfd_ctx, uint64_t sec_addr)
{
uint8_t ver;
dump_sframe_header (sfd_ctx);
ver = sframe_decoder_get_version (sfd_ctx);
if (ver == SFRAME_VERSION)
dump_sframe_functions (sfd_ctx, sec_addr);
else
printf ("\n No further information can be displayed. %s",
"SFrame version not supported\n");
}
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