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syscall doesn't need RPL 3 bits on kernel code
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This commit is contained in:
Kamil Kowalczyk
2026-01-14 21:21:20 +01:00
parent e5cc3a64d3
commit 55166f9d5f
2 changed files with 4 additions and 2 deletions
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3
init/init.c
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@@ -25,4 +25,7 @@ void app_main (void) {
proc_mutex_lock (mutex_rid); proc_mutex_lock (mutex_rid);
proc_test ('b'); proc_test ('b');
proc_mutex_unlock (mutex_rid); proc_mutex_unlock (mutex_rid);
for (;;)
;
} }

3
kernel/amd64/syscall.c
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@@ -34,8 +34,7 @@ int amd64_syscall_dispatch (void* stack_ptr) {
} }
void syscall_init (void) { void syscall_init (void) {
amd64_wrmsr (MSR_STAR, amd64_wrmsr (MSR_STAR, ((uint64_t)GDT_KCODE << 32) | ((uint64_t)(GDT_KDATA | 0x03) << 48));
((uint64_t)(GDT_KCODE | 0x03) << 32) | ((uint64_t)(GDT_KDATA | 0x03) << 48));
amd64_wrmsr (MSR_LSTAR, (uint64_t)&amd64_syscall_entry); amd64_wrmsr (MSR_LSTAR, (uint64_t)&amd64_syscall_entry);
amd64_wrmsr (MSR_SYSCALL_MASK, (1ULL << 9)); amd64_wrmsr (MSR_SYSCALL_MASK, (1ULL << 9));
amd64_wrmsr (MSR_EFER, amd64_rdmsr (MSR_EFER) | EFER_SCE); amd64_wrmsr (MSR_EFER, amd64_rdmsr (MSR_EFER) | EFER_SCE);