diff options
Diffstat (limited to 'src/fw/smm.c')
| -rw-r--r-- | src/fw/smm.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/src/fw/smm.c b/src/fw/smm.c index d90e43a..a0b50b2 100644 --- a/src/fw/smm.c +++ b/src/fw/smm.c @@ -59,6 +59,14 @@ struct smm_layout { struct smm_state cpu; }; +// Hack to supress some gcc array-bounds warnings +static void +memcpy_nowarn(void *d, const void *s, size_t len) +{ + asm("" : "+r"(d), "+r"(s)); + memcpy(d, s, len); +} + void VISIBLE32FLAT handle_smi(u16 cs) { @@ -85,8 +93,8 @@ handle_smi(u16 cs) if (CONFIG_CALL32_SMM) { // Backup current cpu state for SMM trampolining struct smm_layout *newsmm = (void*)BUILD_SMM_ADDR; - memcpy(&newsmm->backup1, &smm->cpu, sizeof(newsmm->backup1)); - memcpy(&newsmm->backup2, &smm->cpu, sizeof(newsmm->backup2)); + memcpy_nowarn(&newsmm->backup1, &smm->cpu, sizeof(newsmm->backup1)); + memcpy_nowarn(&newsmm->backup2, &smm->cpu, sizeof(newsmm->backup2)); HaveSmmCall32 = 1; } @@ -145,8 +153,8 @@ smm_save_and_copy(void) // save original memory content struct smm_layout *initsmm = (void*)BUILD_SMM_INIT_ADDR; struct smm_layout *smm = (void*)BUILD_SMM_ADDR; - memcpy(&smm->cpu, &initsmm->cpu, sizeof(smm->cpu)); - memcpy(&smm->codeentry, &initsmm->codeentry, sizeof(smm->codeentry)); + memcpy_nowarn(&smm->cpu, &initsmm->cpu, sizeof(smm->cpu)); + memcpy_nowarn(&smm->codeentry, &initsmm->codeentry, sizeof(smm->codeentry)); // Setup code entry point. initsmm->codeentry = SMI_INSN; @@ -168,8 +176,9 @@ smm_relocate_and_restore(void) /* restore original memory content */ struct smm_layout *initsmm = (void*)BUILD_SMM_INIT_ADDR; struct smm_layout *smm = (void*)BUILD_SMM_ADDR; - memcpy(&initsmm->cpu, &smm->cpu, sizeof(initsmm->cpu)); - memcpy(&initsmm->codeentry, &smm->codeentry, sizeof(initsmm->codeentry)); + memcpy_nowarn(&initsmm->cpu, &smm->cpu, sizeof(initsmm->cpu)); + memcpy_nowarn(&initsmm->codeentry, &smm->codeentry + , sizeof(initsmm->codeentry)); // Setup code entry point. smm->codeentry = SMI_INSN; |