/* 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 intadd_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 intadd_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 intdata_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;}