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Reported-by: Dark Raven <drdarkraven at gmail.com>
Signed-off-by: Raphael S. Carvalho <raphael.scarv at gmail.com>
---
com32/lib/syslinux/disk.c | 22 ++++++++++++++--------
1 files changed, 14 insertions(+), 8 deletions(-)
diff --git a/com32/lib/syslinux/disk.c b/com32/lib/syslinux/disk.c
index 0b0c737..47ecb52 100644
--- a/com32/lib/syslinux/disk.c
+++ b/com32/lib/syslinux/disk.c
@@ -171,22 +171,28 @@ out:
static void *ebios_setup(const struct disk_info *const diskinfo, com32sys_t *inreg,
uint64_t lba, uint8_t count, uint8_t op_code)
{
- static __lowmem struct disk_ebios_dapa dapa;
+ static struct disk_ebios_dapa *dapa = NULL;
void *buf;
+ if (!dapa) {
+ dapa = lmalloc(sizeof *dapa);
+ if (!dapa)
+ return NULL;
+ }
+
buf = lmalloc(count * diskinfo->bps);
if (!buf)
return NULL;
- dapa.len = sizeof(dapa);
- dapa.count = count;
- dapa.off = OFFS(buf);
- dapa.seg = SEG(buf);
- dapa.lba = lba;
+ dapa->len = sizeof(*dapa);
+ dapa->count = count;
+ dapa->off = OFFS(buf);
+ dapa->seg = SEG(buf);
+ dapa->lba = lba;
inreg->eax.b[1] = op_code;
- inreg->esi.w[0] = OFFS(&dapa);
- inreg->ds = SEG(&dapa);
+ inreg->esi.w[0] = OFFS(dapa);
+ inreg->ds = SEG(dapa);
inreg->edx.b[0] = diskinfo->disk;
return buf;
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