com32: replace hard-coded bounce buffer use in com32/libsyslinux-4.00-pre25

Replace hard-coded bounce buffer uses in com32/lib with lmalloc/lfree.

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

1 files changed, 16 insertions, 10 deletions

diff --git a/com32/lib/syslinux/runimage.c b/com32/lib/syslinux/runimage.c
index 0184df37..29e9aadd 100644
--- a/com32/lib/syslinux/runimage.c
+++ b/com32/lib/syslinux/runimage.c
@@ -40,26 +40,32 @@ void syslinux_run_kernel_image(const char *filename, const char *cmdline,
 			       uint32_t ipappend_flags, uint32_t type)
 {
     static com32sys_t ireg;
-    char *bbfilename, *bbcmdline, *bbptr;
+    char *bbfilename = NULL;
+    char *bbcmdline  = NULL;
     int bytes;
 
-    bbptr = __com32.cs_bounce;
+    bbfilename = lstrdup(filename);
+    if (!bbfilename)
+	goto fail;
 
-    bytes = strlen(filename) + 1;
-    memcpy(bbfilename = bbptr, filename, bytes);
-    bbptr += bytes;
+    bbcmdline = lstrdup(cmdline);
+    if (!bbcmdline)
+	goto fail;
 
-    bytes = strlen(cmdline) + 1;
-    memcpy(bbcmdline = bbptr, filename, bytes);
-    bbptr += bytes;
 
     ireg.eax.w[0] = 0x0016;
     ireg.ds = SEG(bbfilename);
-    ireg.esi.w[0] = OFFS(bbfilename);
+    /* ireg.esi.w[0] = OFFS(bbfilename); */
     ireg.es = SEG(bbcmdline);
-    ireg.ebx.w[0] = OFFS(bbcmdline);
+    /* ireg.ebx.w[0] = OFFS(bbcmdline); */
     ireg.ecx.l = ipappend_flags;
     ireg.edx.l = type;
 
     __intcall(0x22, &ireg, 0);
+
+fail:
+    if (bbcmdline)
+	lfree(bbcmdline);
+    if (bbfilename)
+	lfree(bbfilename);
 }