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Clear registers on handoff

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This commit is contained in:
Jozef Nagy 2025-05-25 14:55:20 +02:00
parent 6eb04c8c40
commit 02e846f1ab
Signed by untrusted user who does not match committer: crz
GPG key ID: 459A4811CEAC7068
1 changed files with 20 additions and 1 deletions
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21
boot/arch/x86_64/common/proto/aurix/handoff.c
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@ -87,7 +87,26 @@ void aurix_arch_handoff(void *kernel_entry, pagetable *pm, void *stack, uint32_t
"movq %[pml4], %%cr3\n" "movq %[pml4], %%cr3\n"
"movq %[stack], %%rsp\n" "movq %[stack], %%rsp\n"
"movq %[params], %%rdi\n" "movq %[params], %%rdi\n"
"callq *%[entry]\n" "movq %[entry], %%rsi\n"
// rsi = kernel entry point addr
// rdi = kernel parameters
"xor %%rax, %%rax\n"
"xor %%rbx, %%rbx\n"
"xor %%rcx, %%rcx\n"
"xor %%rdx, %%rdx\n"
//"xor %%rdi, %%rdi\n"
//"xor %%rsi, %%rsi\n"
"xor %%r8, %%r8\n"
"xor %%r9, %%r9\n"
"xor %%r10, %%r10\n"
"xor %%r11, %%r11\n"
"xor %%r12, %%r12\n"
"xor %%r13, %%r13\n"
"xor %%r14, %%r14\n"
"xor %%r15, %%r15\n"
"callq *%%rsi\n"
:: [gdtr]"g"(gdtr), [tss]"r"((uint16_t)__builtin_offsetof(struct gdt, tss)), :: [gdtr]"g"(gdtr), [tss]"r"((uint16_t)__builtin_offsetof(struct gdt, tss)),
[idt]"g"(idtr), [idt]"g"(idtr),
[pml4]"r"(pm), [stack]"r"(stack + stack_size), [pml4]"r"(pm), [stack]"r"(stack + stack_size),