1 files changed, 63 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/sysdump/vesa.c b/contrib/syslinux-4.02/com32/sysdump/vesa.c
new file mode 100644
index 0000000..017f9e4
--- /dev/null
+++ b/contrib/syslinux-4.02/com32/sysdump/vesa.c
@@ -0,0 +1,63 @@
+#include <string.h>
+#include <stdio.h>
+#include "../lib/sys/vesa/vesa.h"
+#include "backend.h"
+#include "sysdump.h"
+
+void dump_vesa_tables(struct backend *be)
+{
+    com32sys_t rm;
+    struct vesa_info *vip;
+    struct vesa_general_info *gip, gi;
+    struct vesa_mode_info *mip, mi;
+    uint16_t mode, *mode_ptr;
+    char modefile[64];
+
+    printf("Scanning VESA BIOS... ");
+
+    /* Allocate space in the bounce buffer for these structures */
+    vip = lmalloc(sizeof *vip);
+    gip = &vip->gi;
+    mip = &vip->mi;
+
+    memset(&rm, 0, sizeof rm);
+    memset(gip, 0, sizeof *gip);
+
+    gip->signature = VBE2_MAGIC;	/* Get VBE2 extended data */
+    rm.eax.w[0] = 0x4F00;		/* Get SVGA general information */
+    rm.edi.w[0] = OFFS(gip);
+    rm.es = SEG(gip);
+    __intcall(0x10, &rm, &rm);
+    memcpy(&gi, gip, sizeof gi);
+
+    if (rm.eax.w[0] != 0x004F)
+	return;		/* Function call failed */
+    if (gi.signature != VESA_MAGIC)
+	return;		/* No magic */
+
+    cpio_mkdir(be, "vesa");
+
+    cpio_writefile(be, "vesa/global.bin", &gi, sizeof gi);
+
+    mode_ptr = GET_PTR(gi.video_mode_ptr);
+    while ((mode = *mode_ptr++) != 0xFFFF) {
+	memset(mip, 0, sizeof *mip);
+	rm.eax.w[0] = 0x4F01;	/* Get SVGA mode information */
+	rm.ecx.w[0] = mode;
+	rm.edi.w[0] = OFFS(mip);
+	rm.es = SEG(mip);
+	__intcall(0x10, &rm, &rm);
+
+	/* Must be a supported mode */
+	if (rm.eax.w[0] != 0x004f)
+	    continue;
+
+	memcpy(&mi, mip, sizeof mi);
+
+	sprintf(modefile, "vesa/mode%04x.bin", mode);
+	cpio_writefile(be, modefile, &mi, sizeof mi);
+    }
+
+    lfree(vip);
+    printf("done.\n");
+}