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refactor(esp_tee): Revised the secure service ID numbering scheme

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Also:
- Split the secure service table into two parts: one DRAM-resident and the
  other DROM-resident. The former holds the services invoked when the cache is
  disabled or suspended while the latter holds rest of the services.
This commit is contained in:
Laukik Hase
2025-01-15 18:27:56 +05:30
parent a745100bef
commit c4eec756f3
11 changed files with 137 additions and 115 deletions
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25
components/esp_tee/scripts/secure_service_tbl_parser.py
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@@ -5,6 +5,8 @@ import re
from typing import List
from typing import Tuple
SEC_SRV_TABLE_SPLIT_ID = 48
def parse_services(secure_service_tbl: str) -> List[Tuple[int, str, int]]:
services, service_ids = [], set()
@@ -37,8 +39,9 @@ extern "C" {
body = '\n'.join(f'#define SS_{name.upper()}\t{nr}' for nr, name, _ in services)
footer = f'\n#define MAX_SECURE_SERVICES_ID\t{services[-1][0] + 1 if services else 0}\n'
footer += f'#define SECURE_SERVICES_NUM\t{len(services)}\n\n'
footer += f'#define SECURE_SERVICES_SPLIT_ID\t{SEC_SRV_TABLE_SPLIT_ID}\n\n'
footer += '''typedef void (*secure_service_t)(void);
typedef struct { int id; secure_service_t func; int nargs; } secure_service_entry_t;
typedef struct { secure_service_t func; int nargs; } secure_service_entry_t;
'''
footer += '\n#ifdef __cplusplus\n}\n#endif\n'
with open(output_file, 'w') as f:
@@ -62,16 +65,22 @@ extern "C" {
f.write(header + body + footer)
def generate_table(services: List[Tuple[int, str, int]], output_file: str) -> None:
def generate_table_split(services: List[Tuple[int, str, int]], output_file_1: str, output_file_2: str) -> None:
header = '''/**
* THIS FILE WAS AUTOMATICALLY GENERATED. DO NOT EDIT!
*/
#pragma once
'''
body = '\n'.join(f'__SECURE_SERVICE({nr}, {name}, {nargs})' for nr, name, nargs in services)
with open(output_file, 'w') as f:
f.write(header + body)
services_1 = [service for service in services if service[0] < SEC_SRV_TABLE_SPLIT_ID]
services_2 = [service for service in services if service[0] >= SEC_SRV_TABLE_SPLIT_ID]
body_1 = '\n'.join(f'__SECURE_SERVICE({nr}, {name}, {nargs})' for nr, name, nargs in services_1)
body_2 = '\n'.join(f'__SECURE_SERVICE({nr}, {name}, {nargs})' for nr, name, nargs in services_2)
with open(output_file_1, 'w') as f1, open(output_file_2, 'w') as f2:
f1.write(header + body_1)
f2.write(header + body_2)
def generate_wrap_list(secure_service_tbl: str) -> None:
@@ -85,19 +94,19 @@ def main() -> None:
parser = argparse.ArgumentParser(description='Generate secure service outputs')
parser.add_argument('--wrap', action='store_true', help='Generate linker wrap options')
parser.add_argument('secure_service_tbl', type=str, help='Path to secure service table file')
parser.add_argument('output_files', nargs='*', help='Output files: [secure_service_num.h, secure_service_dec.h, secure_service.h]')
parser.add_argument('output_files', nargs='*', help='Output files: [secure_service_num.h, secure_service_dec.h, secure_service_1.h, secure_service_2.h]')
args = parser.parse_args()
if args.wrap:
generate_wrap_list(args.secure_service_tbl)
else:
if len(args.output_files) != 3:
if len(args.output_files) != 4:
parser.error('Missing output header files!')
services = parse_services(args.secure_service_tbl)
generate_num_header(services, args.output_files[0])
generate_dec_header(services, args.output_files[1])
generate_table(services, args.output_files[2])
generate_table_split(services, args.output_files[2], args.output_files[3])
if __name__ == '__main__':