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linuxkm/x86_vector_register_glue.c, linuxkm/linuxkm_wc_port.h, wolfssl/wolfcrypt/memory.h: add WC_SVR_FLAG_FUZZ, implement support for DEBUG_VECTOR_REGISTER_ACCESS_FUZZING directly in the save/restore implementations, and properly reflect existing save state there and in the _FUZZING variants of SAVE_VECTOR_REGISTERS2().

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This commit is contained in:
Daniel Pouzzner
2026-06-27 14:21:00 -05:00
parent 4d46e1eb74
commit 8b5b6af44e
3 changed files with 29 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files
linuxkm/linuxkm_wc_port.h
+3 -11
View File
@@ -192,6 +192,7 @@
enum wc_svr_flags {
WC_SVR_FLAG_NONE = 0,
WC_SVR_FLAG_INHIBIT = 1,
WC_SVR_FLAG_FUZZ
};
#if defined(WOLFSSL_AESNI) || defined(USE_INTEL_SPEEDUP) || \
@@ -705,11 +706,7 @@
#endif
#endif
#ifndef CAN_SAVE_VECTOR_REGISTERS
#ifdef DEBUG_VECTOR_REGISTER_ACCESS_FUZZING
#define CAN_SAVE_VECTOR_REGISTERS() (wc_can_save_vector_registers_x86() && (SAVE_VECTOR_REGISTERS2_fuzzer() == 0))
#else
#define CAN_SAVE_VECTOR_REGISTERS() wc_can_save_vector_registers_x86()
#endif
#define CAN_SAVE_VECTOR_REGISTERS() wc_can_save_vector_registers_x86()
#endif
#ifndef SAVE_VECTOR_REGISTERS
#define SAVE_VECTOR_REGISTERS(fail_clause) { \
@@ -721,12 +718,7 @@
#endif
#ifndef SAVE_VECTOR_REGISTERS2
#ifdef DEBUG_VECTOR_REGISTER_ACCESS_FUZZING
#define SAVE_VECTOR_REGISTERS2() ({ \
int _fuzzer_ret = SAVE_VECTOR_REGISTERS2_fuzzer(); \
(_fuzzer_ret == 0) ? \
wc_save_vector_registers_x86(WC_SVR_FLAG_NONE) : \
_fuzzer_ret; \
})
#define SAVE_VECTOR_REGISTERS2() wc_save_vector_registers_x86(WC_SVR_FLAG_FUZZ)
#else
#define SAVE_VECTOR_REGISTERS2() wc_save_vector_registers_x86(WC_SVR_FLAG_NONE)
#endif
linuxkm/x86_vector_register_glue.c
+13
View File
@@ -323,6 +323,11 @@ WARN_UNUSED_RESULT int wc_can_save_vector_registers_x86(void)
}
}
#ifdef DEBUG_VECTOR_REGISTER_ACCESS_FUZZING
if (SAVE_VECTOR_REGISTERS2_fuzzer() != 0)
return 0;
#endif
if ((preempt_count() == 0) || may_use_simd())
return 1;
else
@@ -423,6 +428,14 @@ WARN_UNUSED_RESULT int wc_save_vector_registers_x86(enum wc_svr_flags flags)
return 0;
}
#ifdef DEBUG_VECTOR_REGISTER_ACCESS_FUZZING
if (flags & WC_SVR_FLAG_FUZZ) {
int ret = SAVE_VECTOR_REGISTERS2_fuzzer();
if (ret != 0)
return ret;
}
#endif
if ((preempt_count() == 0) || may_use_simd()) {
/* fpregs_lock() calls either local_bh_disable() or preempt_disable()
* depending on CONFIG_PREEMPT_RT -- we call both, explicitly.
wolfssl/wolfcrypt/memory.h
+13 -5
View File
@@ -356,9 +356,6 @@ WOLFSSL_LOCAL int wc_debug_CipherLifecycleFree(void **CipherLifecycleTag,
#ifndef WC_DEBUG_VECTOR_REGISTERS_FUZZING_SEED
#define WC_DEBUG_VECTOR_REGISTERS_FUZZING_SEED 0
#endif
#ifndef CAN_SAVE_VECTOR_REGISTERS
#define CAN_SAVE_VECTOR_REGISTERS() (SAVE_VECTOR_REGISTERS2_fuzzer() == 0)
#endif
#endif
#ifdef DEBUG_VECTOR_REGISTER_ACCESS
@@ -420,15 +417,26 @@ WOLFSSL_LOCAL int wc_debug_CipherLifecycleFree(void **CipherLifecycleTag,
} while (0)
#ifdef DEBUG_VECTOR_REGISTER_ACCESS_FUZZING
#ifndef CAN_SAVE_VECTOR_REGISTERS
#define CAN_SAVE_VECTOR_REGISTERS() \
((wc_svr_count > 0) ? 1 : \
SAVE_VECTOR_REGISTERS2_fuzzer() == 0)
#endif
#define SAVE_VECTOR_REGISTERS2(...) ({ \
int _svr2_val = SAVE_VECTOR_REGISTERS2_fuzzer(); \
int _svr2_val; \
if (wc_svr_count > 0) \
_svr2_val = 0; \
else \
_svr2_val = SAVE_VECTOR_REGISTERS2_fuzzer(); \
if (_svr2_val == 0) { \
++wc_svr_count; \
if (wc_svr_count > 5) { \
fprintf(stderr, \
("%s() %s @ L %d : incr : " \
"wc_svr_count %d (last op %s L %d)\n"), \
__FUNCTION__, \
__func__, \
__FILE__, \
__LINE__, \
wc_svr_count, \