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kernel: ldt support

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Matheus
2026-03-20 21:23:59 -03:00
parent a73c82f912
commit 41f97c6c61
17 changed files with 315 additions and 94 deletions
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kernel-src/include/x86-64/arch/signal.h
+11 -1
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@@ -66,6 +66,12 @@ static inline void arch_sigframe_init(sigframe_t *sigframe) {
sigframe->extracontext.xsave = sigframe->xsave;
}
#define CS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 0))
#define GS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 1))
#define FS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 2))
#define SS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 3))
static inline void arch_sigframe_prepare_mcontext(void *stack, sigframe_t *sigframe) {
context_t *context = &sigframe->context;
extracontext_t *extracontext = &sigframe->extracontext;
@@ -89,7 +95,7 @@ static inline void arch_sigframe_prepare_mcontext(void *stack, sigframe_t *sigfr
gregs[MCONTEXT_REG_RSP] = context->rsp;
gregs[MCONTEXT_REG_RIP] = context->rip;
gregs[MCONTEXT_REG_EFL] = context->rflags;
gregs[MCONTEXT_REG_CSGSFS] = 0;
gregs[MCONTEXT_REG_CSGSFS] = (uint64_t)context->cs | ((uint64_t)context->gs << 16) | ((uint64_t)context->fs << 32) | ((uint64_t)context->ss << 48);
gregs[MCONTEXT_REG_ERR] = context->error;
gregs[MCONTEXT_REG_TRAPNO] = context->irq;
gregs[MCONTEXT_REG_OLDMASK] = 0;
@@ -124,6 +130,10 @@ static inline void arch_sigframe_get_context_from_mcontext(sigframe_t *sigframe)
context->rflags = gregs[MCONTEXT_REG_EFL];
context->error = gregs[MCONTEXT_REG_ERR];
context->cr2 = gregs[MCONTEXT_REG_CR2];
context->cs = gregs[MCONTEXT_REG_CSGSFS] & 0xffff;
context->gs = (gregs[MCONTEXT_REG_CSGSFS] >> 16) & 0xffff;
context->fs = (gregs[MCONTEXT_REG_CSGSFS] >> 32) & 0xffff;
context->ss = (gregs[MCONTEXT_REG_CSGSFS] >> 48) & 0xffff;
}