core: use better malloc; add low memory malloc; fix com32 exit

Use a better malloc for the core.  In particular, use the same core
that we should eventually be able to use for the entire system in
Syslinux 5 -- with module awareness, etc.

This code can also accommodate multiple heaps.  Set up a separate heap
for lowmem; the intent is to use explicit lowmem allocations instead
of the static bounce buffer.  The lowmem allocation is also exported
via the pmapi mechanism, so modules can safely allocate lowmem.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/core/pmapi.c b/core/pmapi.c
index f45a7fc6..0cb664ec 100644
--- a/core/pmapi.c
+++ b/core/pmapi.c
@@ -19,5 +19,8 @@
 
 const struct com32_pmapi pm_api_vector =
 {
+    .lmalloc	= pmapi_lmalloc, /* Allocate low memory */
+    .lfree	= free,		 /* Free low memory */
+
     .read_file	= pmapi_read_file,
 };