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Use mempy to perform type punning for setting gdt entry 

Signed-off-by: Brennan Ashton <bashton@brennanashton.com>
This commit is contained in:
Brennan Ashton 2020-04-29 20:58:03 -07:00 committed by patacongo
parent 4c24d91b4a
commit 2405901bf2
1 changed files with 4 additions and 1 deletions
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arch/x86_64/src/intel64/up_irq.c
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@ -190,7 +190,10 @@ static void up_ist_init(void)
tss_h = (((uintptr_t)ist64 >> 32) & 0xffffffff); /* High address */ tss_h = (((uintptr_t)ist64 >> 32) & 0xffffffff); /* High address */
gdt64[X86_GDT_ISTL_SEL_NUM] = tss_l; gdt64[X86_GDT_ISTL_SEL_NUM] = tss_l;
gdt64[X86_GDT_ISTH_SEL_NUM] = *((struct gdt_entry_s *)&tss_h);
/* memcpy used to handle type punning compiler warning */
memcpy((void *)&gdt64[X86_GDT_ISTH_SEL_NUM], (void *)&tss_h, sizeof(gdt64[0]));
ist64->IST1 = (uintptr_t)g_interrupt_stack_end; ist64->IST1 = (uintptr_t)g_interrupt_stack_end;
ist64->IST2 = (uintptr_t)g_isr_stack_end; ist64->IST2 = (uintptr_t)g_isr_stack_end;