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better error message when xsave context is too small

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This commit is contained in:
Adrien Destugues
2020-08-05 12:31:10 +02:00
parent daf10ef340
commit d077ef8a1a
1 changed files with 5 additions and 1 deletions
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src/system/kernel/arch/x86/64/thread.cpp
+5 -1
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@@ -144,7 +144,11 @@ arch_thread_init(kernel_args* args)
// Save one global valid FPU state; it will be copied in the arch dependent // Save one global valid FPU state; it will be copied in the arch dependent
// part of each new thread. // part of each new thread.
if (gHasXsave || gHasXsavec) { if (gHasXsave || gHasXsavec) {
ASSERT(gFPUSaveLength <= sizeof(sInitialState.fpu_state)); if (gFPUSaveLength > sizeof(sInitialState.fpu_state)) {
panic("XSAVE FPU context is larger than allowed "
"(need at least %" B_PRIu64 " bytes)", gFPUSaveLength);
return B_ERROR;
}
memset(sInitialState.fpu_state, 0, gFPUSaveLength); memset(sInitialState.fpu_state, 0, gFPUSaveLength);
if (gHasXsavec) { if (gHasXsavec) {
asm volatile ( asm volatile (