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Added DARWIN_IOFBSETGAMMATABLE

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In DARWIN_IOFBSETCLUTWITHENTRIES, split big tables into 128 items chunks
so that they fit in the stackgap (currently 512 bytes)
This commit is contained in:
manu 2003-12-29 01:34:02 +00:00
parent 7ab97b2c76
commit 5c83b03a81
1 changed files with 75 additions and 35 deletions
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110
sys/compat/darwin/darwin_ioframebuffer.c
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@ -1,4 +1,4 @@
/* $NetBSD: darwin_ioframebuffer.c,v 1.30 2003/12/27 22:06:19 manu Exp $ */
/* $NetBSD: darwin_ioframebuffer.c,v 1.31 2003/12/29 01:34:02 manu Exp $ */
/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
@ -37,7 +37,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: darwin_ioframebuffer.c,v 1.30 2003/12/27 22:06:19 manu Exp $");
__KERNEL_RCSID(0, "$NetBSD: darwin_ioframebuffer.c,v 1.31 2003/12/29 01:34:02 manu Exp $");
#include <sys/types.h>
#include <sys/param.h>
@ -511,8 +511,8 @@ darwin_ioframebuffer_connect_map_memory(args)
struct vnode *vp;
/*
* Use unit given by sysctl emul.darwin.ioframebuffer_unit
* and emul.darwin.ioframebuffer_screen
* Use unit given by sysctl emul.darwin.ioframebuffer.unit
* and emul.darwin.ioframebuffer.screen
*/
unit = darwin_ioframebuffer_unit;
screen = darwin_ioframebuffer_screen;
@ -670,12 +670,32 @@ darwin_ioframebuffer_connect_method_scalari_structi(args)
break;
}
case DARWIN_IOFBSETGAMMATABLE: {
int entries;
int count;
int width;
int *data;
entries = req->req_in[0];
count = req->req_in[1];
width = req->req_in[2];
#ifdef DEBUG_DARWIN
printf("DARWIN_IOFBSETGAMMATABLE: entries = %d, "
"count = %d, width = %d\n", entries, count, width);
#endif
data = &req->req_in[3];
break;
}
case DARWIN_IOFBSETCLUTWITHENTRIES: {
int index;
int option;
struct darwin_iocolorentry *clut;
size_t clutlen;
size_t kcolorsize;
size_t tablen;
size_t kcolorsz;
caddr_t sg = stackgap_init(p, 0);
int error;
struct wsdisplay_cmap cmap;
@ -695,42 +715,17 @@ darwin_ioframebuffer_connect_method_scalari_structi(args)
clutlen = struct_len / sizeof(*clut);
clut = (struct darwin_iocolorentry *)struct_data;
if (clutlen == 0)
if ((clutlen == 0) || (index >= 256))
break;
if (clutlen >= 256)
return mach_msg_error(args, EINVAL);
#ifdef DEBUG_DARWIN
printf("DARWIN_IOFBSETCLUTWITHENTRIES: index = %d, "
"option = %d, clutlen = %d\n", index, option, clutlen);
#endif
kcolorsize = sizeof(u_char) * clutlen;
red = stackgap_alloc(p, &sg, kcolorsize);
green = stackgap_alloc(p, &sg, kcolorsize);
blue = stackgap_alloc(p, &sg, kcolorsize);
for (i = 0; i < clutlen; i++) {
kred[i] = (u_char)(clut->red >> 8);
kgreen[i] = (u_char)(clut->green >> 8);
kblue[i] = (u_char)(clut->blue >> 8);
clut++;
}
cmap.index = index;
cmap.count = clutlen;
cmap.red = red;
cmap.green = green;
cmap.blue = blue;
if (((error = copyout(kred, red, kcolorsize)) != 0) ||
((error = copyout(kgreen, green, kcolorsize)) != 0) ||
((error = copyout(kblue, blue, kcolorsize)) != 0))
return mach_msg_error(args, error);
/*
* Find wsdisplay. Use the screen given by sysctl
* emul.darwin.ioframebuffer_screen
* emul.darwin.ioframebuffer.screen
*/
unit = darwin_ioframebuffer_unit;
screen = darwin_ioframebuffer_screen;
@ -740,9 +735,54 @@ darwin_ioframebuffer_connect_method_scalari_structi(args)
if ((wsdisplay = cdevsw_lookup(dev)) == NULL)
return mach_msg_error(args, ENXIO);
if ((error = (wsdisplay->d_ioctl)(dev,
WSDISPLAYIO_PUTCMAP, (caddr_t)&cmap, 0, p)) != 0)
return mach_msg_error(args, error);
/*
* We only support 256 entries
*/
if (index + clutlen > 256)
clutlen = 256 - index;
/*
* Big tables will not fit in the stackgap.
* We have to split the data.
*/
if (clutlen <= 128)
tablen = clutlen;
else
tablen = 128;
kcolorsz = sizeof(u_char) * tablen;
red = stackgap_alloc(p, &sg, kcolorsz);
green = stackgap_alloc(p, &sg, kcolorsz);
blue = stackgap_alloc(p, &sg, kcolorsz);
do {
for (i = 0; i < tablen; i++) {
kred[i] = (u_char)(clut->red >> 8);
kgreen[i] = (u_char)(clut->green >> 8);
kblue[i] = (u_char)(clut->blue >> 8);
clut++;
}
cmap.index = index;
cmap.count = tablen;
cmap.red = red;
cmap.green = green;
cmap.blue = blue;
if (((error = copyout(kred, red, kcolorsz)) != 0) ||
((error = copyout(kgreen, green, kcolorsz)) != 0) ||
((error = copyout(kblue, blue, kcolorsz)) != 0))
return mach_msg_error(args, error);
if ((error = (wsdisplay->d_ioctl)(dev,
WSDISPLAYIO_PUTCMAP, (caddr_t)&cmap, 0, p)) != 0)
return mach_msg_error(args, error);
index += tablen;
clutlen -= tablen;
if (clutlen <= 128)
tablen = clutlen;
} while (clutlen > 0);
break;
}