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/* encode-1.c -- Test for encoder in libsframe.
Copyright (C) 2022-2026 Free Software Foundation, Inc.
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 "sframe-test.h"
static int
add_fde1 (sframe_encoder_ctx *encode, int64_t start_pc_vaddr,
int64_t sframe_vaddr, int idx, uint32_t *func_size)
{
#define FDE1_NUM_FRES 4
/* A contiguous block containing 4 FREs. */
sframe_frame_row_entry fres[]
= { {0x0, {0x8, 0, 0}, 0x3},
{0x1, {0x10, 0xf0, 0}, 0x5},
{0x4, {0x10, 0xf0, 0}, 0x4},
{0x1a, {0x8, 0xf0, 0}, 0x5}
};
/* Function size in bytes. P.S. Must be a value greater than the
fre_start_addr of the last FRE above (0x1a). */
*func_size = 0x1b;
uint32_t offsetof_fde_in_sec
= sframe_encoder_get_offsetof_fde_start_addr (encode, idx, NULL);
int64_t func1_start_addr = (start_pc_vaddr
- (sframe_vaddr + offsetof_fde_in_sec));
unsigned char finfo = sframe_fde_create_func_info (SFRAME_FRE_TYPE_ADDR1,
SFRAME_V3_FDE_PCTYPE_INC);
int err = sframe_encoder_add_funcdesc_v3 (encode, func1_start_addr,
*func_size, finfo, 0, 0,
FDE1_NUM_FRES);
if (err == -1)
return err;
for (unsigned int i = 0; i < FDE1_NUM_FRES; i++)
if (sframe_encoder_add_fre (encode, idx, fres + i) == SFRAME_ERR)
return -1;
return 0;
}
static int
add_fde2 (sframe_encoder_ctx *encode, int64_t start_pc_vaddr,
int64_t sframe_vaddr, int idx, uint32_t *func_size)
{
/* A contiguous block containing 4 FREs. */
#define FDE2_NUM_FRES 4
sframe_frame_row_entry fres[]
= { {0x0, {0x8, 0, 0}, 0x3},
{0x1, {0x10, 0xf0, 0}, 0x5},
{0x4, {0x10, 0xf0, 0}, 0x4},
{0xf, {0x8, 0xf0, 0}, 0x5}
};
/* Function size in bytes. P.S. Must be a value greater than the
fre_start_addr of the last FRE above (0xf). */
*func_size = 0x10;
uint32_t offsetof_fde_in_sec
= sframe_encoder_get_offsetof_fde_start_addr (encode, idx, NULL);
int64_t func1_start_addr = (start_pc_vaddr
- (sframe_vaddr + offsetof_fde_in_sec));
unsigned char finfo = sframe_fde_create_func_info (SFRAME_FRE_TYPE_ADDR1,
SFRAME_V3_FDE_PCTYPE_INC);
int err = sframe_encoder_add_funcdesc_v3 (encode, func1_start_addr,
*func_size, finfo, 0, 0,
FDE1_NUM_FRES);
if (err == -1)
return err;
for (unsigned int i = 0; i < FDE1_NUM_FRES; i++)
if (sframe_encoder_add_fre (encode, idx, fres + i) == SFRAME_ERR)
return -1;
return 0;
}
/*
* SFrame info from the following source (2 fdes, 4 fres in each fde):
* static int cnt;
* int foo() { return ++cnt; }
* int main() { return foo(); }
*/
#define DATA "DATA2"
static int
data_match (char *sframe_buf, size_t sz)
{
FILE *fp;
struct stat st;
char *sf_buf;
size_t sf_size;
int diffs;
fp = fopen (DATA, "r");
if (fp == NULL)
return 0;
if (fstat (fileno (fp), &st) < 0)
{
perror ("fstat");
fclose (fp);
return 0;
}
sf_buf = malloc (st.st_size);
if (sf_buf == NULL)
{
perror ("malloc");
return 0;
}
sf_size = fread (sf_buf, 1, st.st_size, fp);
fclose (fp);
if (sf_size == 0 || sf_buf == NULL)
{
fprintf (stderr, "Encode: Read section failed\n");
return 0;
}
if (sf_size != sz)
return 0;
diffs = memcmp (sf_buf, sframe_buf, sz);
free (sf_buf);
return diffs == 0;
}
int main (void)
{
sframe_encoder_ctx *encode;
sframe_frame_row_entry frep;
int64_t sframe_vaddr;
int64_t func1_start_vaddr;
int64_t func2_start_vaddr;
uint32_t func1_size = 0;
uint32_t func2_size = 0;
char *sframe_buf;
size_t sf_size;
int err = 0;
unsigned int fde_cnt = 0;
int match_p = 0;
sframe_vaddr = 0x4020c8;
encode = sframe_encode (SFRAME_VERSION,
SFRAME_F_FDE_FUNC_START_PCREL,
SFRAME_ABI_AMD64_ENDIAN_LITTLE,
SFRAME_CFA_FIXED_FP_INVALID,
-8, /* Fixed RA offset for AMD64. */
&err);
fde_cnt = sframe_encoder_get_num_fidx (encode);
TEST (fde_cnt == 0, "encode-1: Encoder FDE count at init");
err = sframe_encoder_add_fre (encode, 1, &frep);
TEST (err == SFRAME_ERR, "encode-1: Encoder update workflow");
func1_start_vaddr = 0x401106;
err = add_fde1 (encode, func1_start_vaddr, sframe_vaddr, 0, &func1_size);
TEST (err == 0, "encode-1: Encoder adding FDE1");
/* Function 2 is placed after 0x0 bytes from the end of Function 1. */
func2_start_vaddr = func1_start_vaddr + func1_size + 0x0;
err = add_fde2 (encode, func2_start_vaddr, sframe_vaddr, 1, &func2_size);
TEST (err == 0, "encode-1: Encoder adding FDE2");
fde_cnt = sframe_encoder_get_num_fidx (encode);
TEST (fde_cnt == 2, "encode-1: Encoder FDE count post addition");
sframe_buf = sframe_encoder_write (encode, &sf_size, true, &err);
TEST (err == 0, "encode-1: Encoder write");
match_p = data_match (sframe_buf, sf_size);
TEST (match_p == 1, "encode-1: Encode buffer match");
sframe_encoder_free (&encode);
return 0;
}
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