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update hosts for cored target

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WIP: currently the hosts are not generic and don't support different
targets
This commit is contained in:
Christoph Urlacher
2026-04-07 20:22:12 +02:00
parent 39d2e1c51f
commit 28a3c37d41
8 changed files with 350 additions and 80 deletions
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38
targets/c-host/fail.c
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@ -1,4 +1,5 @@
#include "../lib.h"
#include "../lib_cored.h"
void fail_start_trace(void) {}
void fail_stop_trace(void) {}
@ -6,18 +7,47 @@ void fail_marker_positive(void) {}
void fail_marker_negative(void) {}
void fail_marker_detected(void) {}
void init_outputs(plain_t x_c, plain_t y_c, plain_t z_c);
int wasm_module(void);
enc_t get_cored_res(void);
MAIN() {
int result;
void os_main(void) {
init_outputs(100, 142, 100);
fail_start_trace();
result = wasm_module();
sign_t static_sig = wasm_module();
fail_stop_trace();
if (result == 100) {
sign_t vote_result_sig;
switch (static_sig) {
case SIG_s_XYZ:
case SIG_s_XY:
case SIG_s_XZ:
vote_result_sig = SIG_X;
break;
case SIG_s_YZ:
vote_result_sig = SIG_Y;
break;
default:
break;
}
// Inversely apply constant program flow signature.
enc_t cored_res = get_cored_res();
cored_res -= static_sig;
/* Validate Vote result */
if (!check(cored_res, THE_A, vote_result_sig)) {
fail_marker_detected();
return;
}
plain_t res = decode(cored_res, THE_A, vote_result_sig);
if (res == 100) {
fail_marker_positive();
return;
} else {
fail_marker_negative();
return;
}
}

49
targets/c-host/linux.c
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@ -1,15 +1,56 @@
#include "../lib_cored.h"
#include <stdio.h>
void init_outputs(plain_t x_c, plain_t y_c, plain_t z_c);
int wasm_module(void);
enc_t get_cored_res(void);
void fail_marker_detected(void) {}
int main(int argc, char *argv[]) {
int result = wasm_module();
init_outputs(100, 142, 100);
sign_t static_sig = wasm_module();
if (result == 100) {
printf("OK Marker\n");
sign_t vote_result_sig;
switch (static_sig) {
case SIG_s_XYZ:
case SIG_s_XY:
case SIG_s_XZ:
vote_result_sig = SIG_X;
break;
case SIG_s_YZ:
vote_result_sig = SIG_Y;
break;
default:
// printf("ERROR: Unknown static_sig %d\n", static_sig);
break;
}
// Inversely apply constant program flow signature.
enc_t cored_res = get_cored_res();
printf("Inversely apply: cored_res=%d static_sig=%d\n", cored_res,
static_sig);
cored_res -= static_sig;
/* Validate Vote result */
printf(
"Validating vote result: cored_res=%d THE_A=%d vote_result_sig = % d\n ",
cored_res, THE_A, vote_result_sig);
if (!check(cored_res, THE_A, vote_result_sig)) {
printf("Validation failed :(\n");
// fail_marker_detected();
return 1;
}
plain_t res = decode(cored_res, THE_A, vote_result_sig);
// printf("Decoded result: %d (%f)\n", res, q_to_float(res));
if (res == 100) {
// fail_marker_positive();
printf("Marker Positive\n");
return 0;
} else {
printf("FAIL Marker\n");
printf("Marker Negative\n");
// fail_marker_negative();
return 1;
}
}

31
targets/lib.h
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@ -4,37 +4,16 @@
#define INLINE __attribute__((always_inline)) inline
#define NOINLINE __attribute__((noinline))
#define __QUOTE(x) #x
#define QUOTE(x) __QUOTE(x)
#define MAIN() void os_main(void)
#define POSIX_PRINTF(...)
#define ARCH_ASM_CLOBBER_ALL "eax", "ebx", "ecx", "edx", "esi", "edi", "ebp"
#define MARKER(str) \
__asm__ volatile(QUOTE(str) ":" \
: /* no inputs */ \
: /* no outputs */ \
: "memory", ARCH_ASM_CLOBBER_ALL)
typedef __UINT8_TYPE__ uint8_t;
typedef __UINT16_TYPE__ uint16_t;
typedef __UINT32_TYPE__ uint32_t;
typedef __INT8_TYPE__ int8_t;
typedef __INT16_TYPE__ int16_t;
typedef __INT32_TYPE__ int32_t;
// Mark start of injection
void __attribute__((noinline)) fail_start_trace(void);
void NOINLINE fail_start_trace(void);
// Mark end of injection
void __attribute__((noinline)) fail_stop_trace(void);
void NOINLINE fail_stop_trace(void);
// everything ok: valid code and right values
void __attribute__((noinline)) fail_marker_positive(void);
void NOINLINE fail_marker_positive(void);
// everything ok: valid code but wrong values
void __attribute__((noinline)) fail_marker_negative(void);
void NOINLINE fail_marker_negative(void);
// invalid code
void __attribute__((noinline)) fail_marker_detected(void);
void NOINLINE fail_marker_detected(void);
#endif

37
targets/lib_cored.h Normal file
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@ -0,0 +1,37 @@
#ifndef _include_lib_cored_h
#define _include_lib_cored_h
#include <stdint.h>
#define SENSORS_COUNT 3
#define FILTER_COUNT 3
typedef uint16_t enc_t;
typedef uint8_t plain_t;
typedef int8_t sign_t;
#define check(vc, A, B) (((vc - B) % A) == 0)
#define encode(v, A, B) ((((plain_t)v) * ((sign_t)A)) + ((sign_t)B))
#define decode(vc, A, B) ((vc - B) / A)
#define equals(vc1, vc2, B1, B2) ((vc1 - vc2) == (B1 - B2))
#define THE_A 110
// CONSTANT Replica results signatures
#define SIG_X 32
#define SIG_Y 23
#define SIG_Z 67
#define SIG_MAX SIG_Z
// CONSTANT Voter Result Signatures
#define SIG_s_XYZ ((SIG_X - SIG_Y) + (SIG_X - SIG_Z))
#define SIG_s_XY (SIG_X - SIG_Y)
#define SIG_s_YZ (SIG_Y - SIG_Z)
#define SIG_s_XZ (SIG_X - SIG_Z)
#define XC filter_out[0]
#define YC filter_out[1]
#define ZC filter_out[2]
#endif

112
targets/wasm-host/fail.c
View File

@ -1,4 +1,5 @@
#include "../lib.h"
#include "../lib_cored.h"
#include "bh_platform.h"
#include "wasm_export.h"
@ -11,16 +12,18 @@ void fail_marker_positive(void) {}
void fail_marker_negative(void) {}
void fail_marker_detected(void) {}
void fail_start_trace_wasm(wasm_exec_env_t exec_env) {}
void fail_stop_trace_wasm(wasm_exec_env_t exec_env) {}
void fail_marker_positive_wasm(wasm_exec_env_t exec_env) {}
void fail_marker_negative_wasm(wasm_exec_env_t exec_env) {}
void fail_marker_detected_wasm(wasm_exec_env_t exec_env) {}
#define STACK_SIZE (4 * 1024)
#define HEAP_SIZE STACK_SIZE
#define RUNTIME_POOL_SIZE 4 * STACK_SIZE
MAIN() {
void os_main() {
char error_buf[128];
wasm_module_t module;
wasm_module_inst_t module_inst;
wasm_function_inst_t func;
wasm_exec_env_t exec_env;
/* initialize the wasm runtime */
static char global_heap_buf[RUNTIME_POOL_SIZE];
@ -35,42 +38,109 @@ MAIN() {
return;
}
static NativeSymbol native_symbols[] = {
{"fail_start_trace", fail_start_trace_wasm, "()"},
{"fail_stop_trace", fail_stop_trace_wasm, "()"},
{"fail_marker_positive", fail_marker_positive_wasm, "()"},
{"fail_marker_negative", fail_marker_negative_wasm, "()"},
{"fail_marker_detected", fail_marker_detected_wasm, "()"},
};
int n_native_symbols = sizeof(native_symbols) / sizeof(NativeSymbol);
if (!wasm_runtime_register_natives("env", native_symbols, n_native_symbols)) {
return;
}
/* parse the WASM file from buffer and create a WASM module */
module = wasm_runtime_load(__WASM_ARRAY__, __WASM_ARRAY_LEN__, error_buf,
sizeof(error_buf));
wasm_module_t module = wasm_runtime_load(__WASM_ARRAY__, __WASM_ARRAY_LEN__,
error_buf, sizeof(error_buf));
if (!module) {
return;
}
/* create an instance of the WASM module (WASM linear memory is ready) */
module_inst = wasm_runtime_instantiate(module, STACK_SIZE, HEAP_SIZE,
error_buf, sizeof(error_buf));
wasm_module_inst_t module_inst = wasm_runtime_instantiate(
module, STACK_SIZE, HEAP_SIZE, error_buf, sizeof(error_buf));
if (!module_inst) {
return;
}
/* lookup a WASM function by its name, the function signature can NULL here */
func = wasm_runtime_lookup_function(module_inst, "wasm_module");
// Single exec_env for all functions (probably'd need a single one per
// thread?)
wasm_exec_env_t exec_env =
wasm_runtime_create_exec_env(module_inst, STACK_SIZE);
uint32_t args[FILTER_COUNT];
/* create an execution environment to execute arbitrary WASM functions */
exec_env = wasm_runtime_create_exec_env(module_inst, STACK_SIZE);
// Place encoded input values for cored voter.
// They'll be broken by FAIL* on read, so I don't need to inject this (?)
// fail_start_trace();
wasm_function_inst_t init_func =
wasm_runtime_lookup_function(module_inst, "init_outputs");
args[0] = 100;
args[1] = 142;
args[2] = 100;
if (!wasm_runtime_call_wasm(exec_env, init_func, 3, args)) {
return;
}
/* arguments are always transferred in 32-bit element */
uint32_t args[1] = {0};
/* call an arbitrary WASM function */
// CoRed vote
wasm_function_inst_t func =
wasm_runtime_lookup_function(module_inst, "wasm_module");
args[0] = 0;
args[1] = 0;
args[2] = 0;
fail_start_trace();
if (!wasm_runtime_call_wasm(exec_env, func, 0, args)) {
/* function wasn't called correctly */
return;
}
fail_stop_trace();
sign_t static_sig = args[0];
/* the return value is stored in args[0] */
uint32_t result = args[0];
// Obtain dynamic signature produced by CoRed
wasm_function_inst_t cored_res_func =
wasm_runtime_lookup_function(module_inst, "get_cored_res");
args[0] = 0;
args[1] = 0;
args[2] = 0;
if (!wasm_runtime_call_wasm(exec_env, cored_res_func, 0, args)) {
return;
}
enc_t cored_res = args[0];
if (result == 100) {
sign_t vote_result_sig;
switch (static_sig) {
case SIG_s_XYZ:
case SIG_s_XY:
case SIG_s_XZ:
vote_result_sig = SIG_X;
break;
case SIG_s_YZ:
vote_result_sig = SIG_Y;
break;
default:
// printf("ERROR: Unknown static_sig %d\n", static_sig);
break;
}
// Inversely apply constant program flow signature.
// printf("Inversely apply: cored_res=%d static_sig=%d\n", cored_res,
// static_sig);
cored_res -= static_sig;
/* Validate Vote result */
// printf(
// "Validating vote result: cored_res=%d THE_A=%d vote_result_sig = % d\n
// ", cored_res, THE_A, vote_result_sig);
if (!check(cored_res, THE_A, vote_result_sig)) {
// printf("Validation failed :(\n");
fail_marker_detected();
return;
}
plain_t res = decode(cored_res, THE_A, vote_result_sig);
// printf("Decoded result: %d (%f)\n", res, q_to_float(res));
if (res == 100) {
fail_marker_positive();
} else {
fail_marker_negative();

117
targets/wasm-host/linux.c
View File

@ -1,19 +1,23 @@
#include "../lib_cored.h"
#include "bh_platform.h"
#include "wasm_export.h"
#include "__WASM_ARRAY_FILE__"
#include <stdio.h>
void fail_start_trace_wasm(wasm_exec_env_t exec_env) {}
void fail_stop_trace_wasm(wasm_exec_env_t exec_env) {}
void fail_marker_positive_wasm(wasm_exec_env_t exec_env) {}
void fail_marker_negative_wasm(wasm_exec_env_t exec_env) {}
void fail_marker_detected_wasm(wasm_exec_env_t exec_env) {}
#define STACK_SIZE (4 * 1024)
#define HEAP_SIZE STACK_SIZE
#define RUNTIME_POOL_SIZE 4 * STACK_SIZE
int main(int argc, char *argv[]) {
char error_buf[128];
wasm_module_t module;
wasm_module_inst_t module_inst;
wasm_function_inst_t func;
wasm_exec_env_t exec_env;
/* initialize the wasm runtime */
static char global_heap_buf[RUNTIME_POOL_SIZE];
@ -29,9 +33,21 @@ int main(int argc, char *argv[]) {
return 1;
}
static NativeSymbol native_symbols[] = {
{"fail_start_trace", fail_start_trace_wasm, "()"},
{"fail_stop_trace", fail_stop_trace_wasm, "()"},
{"fail_marker_positive", fail_marker_positive_wasm, "()"},
{"fail_marker_negative", fail_marker_negative_wasm, "()"},
{"fail_marker_detected", fail_marker_detected_wasm, "()"},
};
int n_native_symbols = sizeof(native_symbols) / sizeof(NativeSymbol);
if (!wasm_runtime_register_natives("env", native_symbols, n_native_symbols)) {
return 1;
}
/* parse the WASM file from buffer and create a WASM module */
module = wasm_runtime_load(__WASM_ARRAY__, __WASM_ARRAY_LEN__, error_buf,
sizeof(error_buf));
wasm_module_t module = wasm_runtime_load(__WASM_ARRAY__, __WASM_ARRAY_LEN__,
error_buf, sizeof(error_buf));
if (!module) {
printf("Load failed: %s\n", error_buf);
@ -39,42 +55,93 @@ int main(int argc, char *argv[]) {
}
/* create an instance of the WASM module (WASM linear memory is ready) */
module_inst = wasm_runtime_instantiate(module, STACK_SIZE, HEAP_SIZE,
error_buf, sizeof(error_buf));
wasm_module_inst_t module_inst = wasm_runtime_instantiate(
module, STACK_SIZE, HEAP_SIZE, error_buf, sizeof(error_buf));
if (!module_inst) {
printf("Inst failed: %s\n", error_buf);
return 1;
}
/* lookup a WASM function by its name, the function signature can NULL here */
func = wasm_runtime_lookup_function(module_inst, "wasm_module");
wasm_exec_env_t exec_env =
wasm_runtime_create_exec_env(module_inst, STACK_SIZE);
uint32_t args[FILTER_COUNT];
/* create an execution environment to execute arbitrary WASM functions */
exec_env = wasm_runtime_create_exec_env(module_inst, STACK_SIZE);
/* arguments are always transferred in 32-bit element */
uint32_t args[1] = {0};
/* call an arbitrary WASM function */
if (!wasm_runtime_call_wasm(exec_env, func, 0, args)) {
/* function wasn't called correctly */
printf("Failed to call function 'wasm_module'!\n");
wasm_function_inst_t init_func =
wasm_runtime_lookup_function(module_inst, "init_outputs");
args[0] = 100;
args[1] = 142;
args[2] = 100;
if (!wasm_runtime_call_wasm(exec_env, init_func, 3, args)) {
printf("Failed to call init_outputs\n");
return 1;
}
/* the return value is stored in args[0] */
uint32_t result = args[0];
// CoRed vote
wasm_function_inst_t func =
wasm_runtime_lookup_function(module_inst, "wasm_module");
args[0] = 0;
args[1] = 0;
args[2] = 0;
if (!wasm_runtime_call_wasm(exec_env, func, 0, args)) {
printf("Failed to call wasm_module\n");
return 1;
}
sign_t static_sig = args[0];
// Obtain dynamic signature produced by CoRed
wasm_function_inst_t cored_res_func =
wasm_runtime_lookup_function(module_inst, "get_cored_res");
args[0] = 0;
args[1] = 0;
args[2] = 0;
if (!wasm_runtime_call_wasm(exec_env, cored_res_func, 0, args)) {
printf("Failed to call get_cored_res\n");
return 1;
}
enc_t cored_res = args[0];
wasm_runtime_destroy_exec_env(exec_env);
wasm_runtime_deinstantiate(module_inst);
wasm_runtime_unload(module);
wasm_runtime_destroy();
if (result == 100) {
printf("OK Marker\n");
sign_t vote_result_sig;
switch (static_sig) {
case SIG_s_XYZ:
case SIG_s_XY:
case SIG_s_XZ:
vote_result_sig = SIG_X;
break;
case SIG_s_YZ:
vote_result_sig = SIG_Y;
break;
default:
printf("ERROR: Unknown static_sig %d\n", static_sig);
break;
}
// Inversely apply constant program flow signature.
printf("Inversely apply: cored_res=%d static_sig=%d\n", cored_res,
static_sig);
cored_res -= static_sig;
/* Validate Vote result */
printf(
"Validating vote result: cored_res=%d THE_A=%d vote_result_sig = % d\n ",
cored_res, THE_A, vote_result_sig);
if (!check(cored_res, THE_A, vote_result_sig)) {
printf("Validation failed :(\n");
return 1;
}
plain_t res = decode(cored_res, THE_A, vote_result_sig);
// printf("Decoded result: %d (%f)\n", res, q_to_float(res));
if (res == 100) {
printf("Marker Positive\n");
return 0;
} else {
printf("FAIL Marker\n");
printf("Marker Negative\n");
return 1;
}
}

45
targets/wasm-module/cored.c Normal file
View File

@ -0,0 +1,45 @@
#include "../lib.h"
#include "../lib_cored.h"
static enc_t cored_res;
static enc_t filter_out[FILTER_COUNT];
void init_outputs(plain_t x_c, plain_t y_c, plain_t z_c) {
/* Replicated Filtersteps */
XC = encode(x_c, THE_A, SIG_X);
YC = encode(y_c, THE_A, SIG_Y);
ZC = encode(z_c, THE_A, SIG_Z);
}
enc_t INLINE apply(enc_t vc, sign_t bdyn) {
if (bdyn > SIG_MAX) {
fail_marker_detected();
}
return vc + bdyn;
}
sign_t wasm_module(void) {
if (equals(XC, YC, SIG_X, SIG_Y)) {
if (equals(XC, ZC, SIG_X, SIG_Z)) {
cored_res = apply(XC, (XC - YC) + (XC - ZC));
return SIG_s_XYZ;
} else {
cored_res = apply(XC, (XC - YC));
return SIG_s_XY;
}
} else if (equals(YC, ZC, SIG_Y, SIG_Z)) {
cored_res = apply(YC, (YC - ZC));
return SIG_s_YZ;
} else if (equals(XC, ZC, SIG_X, SIG_Z)) {
cored_res = apply(XC, (XC - ZC));
return SIG_s_XZ;
} else {
fail_marker_detected();
return 0;
}
}
enc_t get_cored_res() { return cored_res; }
// enc_t get_xc() { return XC; }
// enc_t get_yc() { return YC; }
// enc_t get_zc() { return ZC; }

1
wasm.just
View File

@ -15,6 +15,7 @@ WASI_CFLAGS := "\
-Wl,--initial-memory=65536 \
-Wl,--export=__heap_base \
-Wl,--export=__data_end \
-Wl,--allow-undefined \
"
CROSS_CFLAGS_NOWASM := "\
-O0 \