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Increase size of Voodoo dirty_line array to 2048 lines, and add some

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bounds checking before accessing. Fixes crash running 3DMark 2001 on
Voodoo 3.
This commit is contained in:
SarahW 2020-11-17 08:32:12 +00:00
commit 8cfb60608e
6 changed files with 13 additions and 10 deletions
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10
src/vid_voodoo_banshee.c
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@ -1929,14 +1929,16 @@ static void banshee_overlay_draw(svga_t *svga, int displine)
if (svga->render == svga_render_null &&
!svga->changedvram[src_addr >> 12] && !svga->changedvram[src_addr2 >> 12] &&
!svga->fullchange && !voodoo->dirty_line[voodoo->overlay.src_y >> 20] &&
!svga->fullchange &&
((voodoo->overlay.src_y >> 20) < 2048 && !voodoo->dirty_line[voodoo->overlay.src_y >> 20]) &&
!(banshee->vidProcCfg & VIDPROCCFG_V_SCALE_ENABLE))
{
voodoo->overlay.src_y += (1 << 20);
return;
}
voodoo->dirty_line[voodoo->overlay.src_y >> 20] = 0;
if ((voodoo->overlay.src_y >> 20) < 2048)
voodoo->dirty_line[voodoo->overlay.src_y >> 20] = 0;
// pclog("displine=%i addr=%08x %08x %08x %08x\n", displine, svga->overlay_latch.addr, src_addr, voodoo->overlay.vidOverlayDvdy, *(uint32_t *)src);
// if (src_addr >= 0x800000)
// fatal("overlay out of range!\n");
@ -2214,7 +2216,7 @@ void banshee_set_overlay_addr(void *p, uint32_t addr)
banshee->svga.overlay.addr = banshee->voodoo->leftOverlayBuf & 0xfffffff;
banshee->svga.overlay_latch.addr = banshee->voodoo->leftOverlayBuf & 0xfffffff;
memset(voodoo->dirty_line, 1, 1024);
memset(voodoo->dirty_line, 1, sizeof(voodoo->dirty_line));
}
static void banshee_vsync_callback(svga_t *svga)
@ -2231,7 +2233,7 @@ static void banshee_vsync_callback(svga_t *svga)
voodoo->swap_pending = 0;
thread_unlock_mutex(voodoo->swap_mutex);
memset(voodoo->dirty_line, 1, 1024);
memset(voodoo->dirty_line, 1, sizeof(voodoo->dirty_line));
voodoo->retrace_count = 0;
banshee_set_overlay_addr(banshee, voodoo->swap_offset);
thread_set_event(voodoo->wake_fifo_thread);