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SVGA refdriver: compile fix for gcc strict aliasing

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Newer versions of GCC have additional strict alias checking,
and so the refdriver's IRQ handler would fail to compile.
Work around this problem (and avoid unwanted compiler
optimizations to boot) by using memcpy instead of struct
assignment.
This commit is contained in:
Micah Dowty 2009-07-01 21:02:40 +00:00
parent adf2dcf69d
commit 15fd4340d6
1 changed files with 3 additions and 3 deletions
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6
lib/refdriver/svga.c
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@ -1397,7 +1397,7 @@ SVGA_WaitForIRQ(void)
void void
SVGAInterruptHandler(int vector) // IN (unused) SVGAInterruptHandler(int vector) // IN (unused)
{ {
volatile IntrContext *context = Intr_GetContext(vector); IntrContext *context = Intr_GetContext(vector);
/* /*
* The SVGA_IRQSTATUS_PORT is a separate I/O port, not a register. * The SVGA_IRQSTATUS_PORT is a separate I/O port, not a register.
@ -1421,8 +1421,8 @@ SVGAInterruptHandler(int vector) // IN (unused)
Atomic_Or(gSVGA.irq.pending, irqFlags); Atomic_Or(gSVGA.irq.pending, irqFlags);
if (gSVGA.irq.switchContext) { if (gSVGA.irq.switchContext) {
gSVGA.irq.oldContext = *context; memcpy((void*) &gSVGA.irq.oldContext, context, sizeof *context);
*context = gSVGA.irq.newContext; memcpy(context, (void*) &gSVGA.irq.newContext, sizeof *context);
gSVGA.irq.switchContext = FALSE; gSVGA.irq.switchContext = FALSE;
} }
} }