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Refactor stack pointer alignment in thread.cpp

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EnderIce2 2024-03-05 00:04:11 +02:00
parent 52ec0a25bf
commit afd9227f31
Signed by untrusted user who does not match committer: enderice2
GPG Key ID: EACC3AD603BAB4DD
1 changed files with 3 additions and 17 deletions
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20
tasking/thread.cpp
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@ -309,6 +309,9 @@ namespace Tasking
uintptr_t StackPointerReg = ((uintptr_t)this->Stack->GetStackTop() - SubtractStack);
// assert(!(StackPointerReg & 0xF));
/* Ensure StackPointerReg is aligned to the closest lower 16 bytes boundary */
StackPointerReg &= ~0xF;
#if defined(a64)
this->Registers.rsp = StackPointerReg;
#elif defined(a32)
@ -327,23 +330,6 @@ namespace Tasking
(void *)((uintptr_t)this->Stack->GetStackPhysicalTop() - (uintptr_t)SubtractStack),
SubtractStack);
#endif
#if defined(a64)
this->Registers.rdi = (uintptr_t)ArgvSize; // argc
this->Registers.rsi = (uintptr_t)(this->Registers.rsp + 8); // argv
this->Registers.rcx = (uintptr_t)EnvpSize; // envc
this->Registers.rdx = (uintptr_t)(this->Registers.rsp + 8 + (8 * ArgvSize) + 8); // envp
#elif defined(a32)
this->Registers.eax = (uintptr_t)ArgvSize; // argc
this->Registers.ebx = (uintptr_t)(this->Registers.esp + 4); // argv
this->Registers.ecx = (uintptr_t)EnvpSize; // envc
this->Registers.edx = (uintptr_t)(this->Registers.esp + 4 + (4 * ArgvSize) + 4); // envp
#elif defined(aa64)
this->Registers.x0 = (uintptr_t)ArgvSize; // argc
this->Registers.x1 = (uintptr_t)(this->Registers.sp + 8); // argv
this->Registers.x2 = (uintptr_t)EnvpSize; // envc
this->Registers.x3 = (uintptr_t)(this->Registers.sp + 8 + (8 * ArgvSize) + 8); // envp
#endif
}
void TCB::SetupUserStack_x86_32(const char **argv,