1 files changed, 77 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/lib/syslinux/shuffle_pm.c b/contrib/syslinux-4.02/com32/lib/syslinux/shuffle_pm.c
new file mode 100644
index 0000000..5e3183b
--- /dev/null
+++ b/contrib/syslinux-4.02/com32/lib/syslinux/shuffle_pm.c
@@ -0,0 +1,77 @@
+/* ----------------------------------------------------------------------- *
+ *
+ *   Copyright 2007-2009 H. Peter Anvin - All Rights Reserved
+ *   Copyright 2009 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.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * shuffle_pm.c
+ *
+ * Shuffle and boot to protected mode code
+ */
+
+#include <inttypes.h>
+#include <syslinux/movebits.h>
+#include <syslinux/bootpm.h>
+
+int syslinux_shuffle_boot_pm(struct syslinux_movelist *fraglist,
+			     struct syslinux_memmap *memmap,
+			     uint16_t bootflags, struct syslinux_pm_regs *regs)
+{
+    uint8_t handoff_code[9 * 5], *p;
+    const uint32_t *rp;
+    int i, rv;
+    struct syslinux_memmap *tmap;
+    addr_t regstub, stublen;
+
+    tmap = syslinux_target_memmap(fraglist, memmap);
+    if (!tmap)
+	return -1;
+
+    regstub = 0x800;		/* Locate anywhere above this point */
+    stublen = sizeof handoff_code;
+    rv = syslinux_memmap_find(tmap, SMT_FREE, &regstub, &stublen, 1);
+    syslinux_free_memmap(tmap);
+    if (rv)
+	return -1;
+
+    /* Build register-setting stub */
+    p = handoff_code;
+    rp = (const uint32_t *)regs;
+    for (i = 0; i < 8; i++) {
+	*p = 0xb8 + i;		/* MOV gpr,imm32 */
+	*(uint32_t *) (p + 1) = *rp++;
+	p += 5;
+    }
+    *p = 0xe9;			/* JMP */
+    *(uint32_t *) (p + 1) = regs->eip - regstub - sizeof handoff_code;
+
+    /* Add register-setting stub to shuffle list */
+    if (syslinux_add_movelist(&fraglist, regstub, (addr_t) handoff_code,
+			      sizeof handoff_code))
+	return -1;
+
+    return syslinux_do_shuffle(fraglist, memmap, regstub, 1, bootflags);
+}