com32: wrapper functions for lowmem allocations

lmalloc(), lfree(), lstrdup()

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

diff --git a/com32/include/com32.h b/com32/include/com32.h
index 9334efb..abbb9bf 100644 (file)
--- a/com32/include/com32.h
+++ b/com32/include/com32.h
@@ -117,6 +117,13 @@ int __cfarcall(uint16_t __cs, uint16_t __ip,
 extern const com32sys_t __com32_zero_regs;
 
 /*
+ * Lowmem allocation functions
+ */
+void *lmalloc(size_t);
+void lfree(void *);
+char *lstrdup(const char *);
+
+/*
  * These functions convert between linear pointers in the range
  * 0..0xFFFFF and real-mode style SEG:OFFS pointers.  Note that a
  * 32-bit linear pointer is not compatible with a SEG:OFFS pointer

diff --git a/com32/lib/Makefile b/com32/lib/Makefile
index 8750579..8aad4f8 100644 (file)
--- a/com32/lib/Makefile
+++ b/com32/lib/Makefile
@@ -27,6 +27,8 @@ LIBOBJS = \
        asprintf.o vasprintf.o strlcpy.o strlcat.o                      \
        vsscanf.o zalloc.o                                              \
        \
+       lmalloc.o lstrdup.o                                             \
+       \
        dprintf.o vdprintf.o                                            \
        \
        opendir.o readdir.o closedir.o getcwd.o chdir.o fdopendir.o     \

diff --git a/com32/lib/lmalloc.c b/com32/lib/lmalloc.c
new file mode 100644 (file)
index 0000000..a73817e
--- /dev/null
+++ b/com32/lib/lmalloc.c
@@ -0,0 +1,40 @@
+/* ----------------------------------------------------------------------- *
+ *
+ *   Copyright 2010 Intel Corporation; author: H. Peter Anvin
+ *
+ *   Permission is hereby granted, free of charge, to any person
+ *   obtaining a copy of this software and associated documentation
+ *   files (the "Software"), to deal in the Software without
+ *   restriction, including without limitation the rights to use,
+ *   copy, modify, merge, publish, distribute, sublicense, and/or
+ *   sell copies of the Software, and to permit persons to whom
+ *   the Software is furnished to do so, subject to the following
+ *   conditions:
+ *
+ *   The above copyright notice and this permission notice shall
+ *   be included in all copies or substantial portions of the Software.
+ *
+ *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *   OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * ----------------------------------------------------------------------- */
+
+#include <com32.h>
+#include <stdlib.h>
+#include <syslinux/pmapi.h>
+
+void *lmalloc(size_t size)
+{
+    return __com32.cs_pm->lmalloc(size);
+}
+
+void lfree(void *ptr)
+{
+    __com32.cs_pm->lfree(ptr);
+}

diff --git a/com32/lib/lstrdup.c b/com32/lib/lstrdup.c
new file mode 100644 (file)
index 0000000..d11efe7
--- /dev/null
+++ b/com32/lib/lstrdup.c
@@ -0,0 +1,18 @@
+/*
+ * lstrdup.c
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <com32.h>
+
+char *lstrdup(const char *s)
+{
+    int l = strlen(s) + 1;
+    char *d = lmalloc(l);
+
+    if (d)
+       memcpy(d, s, l);
+
+    return d;
+}