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Completely remove UVM32_STACK_PROTECTION unless enabled (requires manually changing crt0.S), as this saves 16 bytes on every .bin

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Toby Jaffey 2025-12-14 00:09:32 +00:00
parent c1399fbe86
commit 173d5056a5
17 changed files with 6 additions and 5 deletions
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4
uvm32/uvm32.c
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@ -273,8 +273,8 @@ uint32_t uvm32_run(uvm32_state_t *vmst, uvm32_evt_t *evt, uint32_t instr_meter)
case UVM32_SYSCALL_HALT:
setStatus(vmst, UVM32_STATUS_ENDED);
break;
case UVM32_SYSCALL_STACKPROTECT: {
#ifdef UVM32_STACK_PROTECTION
case UVM32_SYSCALL_STACKPROTECT: {
// don't allow errant code to change it once set
if (vmst->_stack_canary == (uint8_t *)NULL) {
uint32_t param0 = vmst->_core.regs[10]; // a0
@ -295,8 +295,8 @@ uint32_t uvm32_run(uvm32_state_t *vmst, uvm32_evt_t *evt, uint32_t instr_meter)
*vmst->_stack_canary = STACK_CANARY_VALUE;
}
}
#endif
} break;
#endif
default:
// user defined syscalls
vmst->_ioevt.typ = UVM32_EVT_SYSCALL;