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xcat-dep/gpxe/gpxe-0.9.7-iretfixes.patch
jbjohnso a60d90375d -Add several patches from gPXE git tree (all of this checkin is from gPXE git tree)
-Add workaround for use of Etherboot UNDI stack from git tree
-Add workaround for UNDI drivers that do not call the undi open call before attempting to use defive from git tree
-Change ProxyDHCP broadcast to go to port 67 (from git tree)
-Enable use of DHCP options when BOOTP fields are not present
-Report UNDI device to driver as a more standard interface type
-Workaround malformed OACK packets sent by certain PXE servers
-Avoid a spurious IRQ
-Add fix for e1000 driver
-Have the UNDI stack report UNDI capabilities
-Fix some places where interrupt handlers did not use iret to return
2009-08-22 02:03:07 +00:00

112 lines
3.4 KiB
Diff

diff -urN gpxe-0.9.7/src/arch/i386/firmware/pcbios/e820mangler.S gpxe-0.9.7-iretfixes/src/arch/i386/firmware/pcbios/e820mangler.S
--- gpxe-0.9.7/src/arch/i386/firmware/pcbios/e820mangler.S 2009-03-01 21:23:42.000000000 -0500
+++ gpxe-0.9.7-iretfixes/src/arch/i386/firmware/pcbios/e820mangler.S 2009-08-21 21:28:41.000000000 -0400
@@ -490,6 +490,18 @@
.size get_mangled_e820, . - get_mangled_e820
/****************************************************************************
+ * Set/clear CF on the stack as appropriate, assumes stack is as it should
+ * be immediately before IRET
+ ****************************************************************************
+ */
+patch_cf:
+ pushw %bp
+ movw %sp, %bp
+ setc 8(%bp) /* Set/reset CF; clears PF, AF, ZF, SF */
+ popw %bp
+ ret
+
+/****************************************************************************
* INT 15,e820 handler
****************************************************************************
*/
@@ -500,7 +512,8 @@
popw %ds
call get_mangled_e820
popw %ds
- lret $2
+ call patch_cf
+ iret
.size int15_e820, . - int15_e820
/****************************************************************************
@@ -512,7 +525,7 @@
/* Call previous handler */
pushfw
lcall *%cs:int15_vector
- pushfw
+ call patch_cf
/* Edit result */
pushw %ds
pushw %cs:rm_ds
@@ -524,9 +537,7 @@
xchgw %ax, %cx
xchgw %bx, %dx
popw %ds
- /* Restore flags returned by previous handler and return */
- popfw
- lret $2
+ iret
.size int15_e801, . - int15_e801
/****************************************************************************
@@ -538,16 +549,14 @@
/* Call previous handler */
pushfw
lcall *%cs:int15_vector
- pushfw
+ call patch_cf
/* Edit result */
pushw %ds
pushw %cs:rm_ds
popw %ds
call patch_1m
popw %ds
- /* Restore flags returned by previous handler and return */
- popfw
- lret $2
+ iret
.size int15_88, . - int15_88
/****************************************************************************
diff -urN gpxe-0.9.7/src/arch/i386/firmware/pcbios/fakee820.c gpxe-0.9.7-iretfixes/src/arch/i386/firmware/pcbios/fakee820.c
--- gpxe-0.9.7/src/arch/i386/firmware/pcbios/fakee820.c 2009-03-01 21:23:42.000000000 -0500
+++ gpxe-0.9.7-iretfixes/src/arch/i386/firmware/pcbios/fakee820.c 2009-08-21 21:28:41.000000000 -0400
@@ -63,6 +63,8 @@
"cmpl $0x534d4150, %%edx\n\t"
"jne 99f\n\t"
"pushaw\n\t"
+ "movw %%sp, %%bp\n\t"
+ "andb $~0x01, 22(%%bp)\n\t" /* Clear return CF */
"leaw e820map(%%bx), %%si\n\t"
"cs rep movsb\n\t"
"popaw\n\t"
@@ -73,8 +75,7 @@
"xorl %%ebx,%%ebx\n\t"
"\n1:\n\t"
"popfw\n\t"
- "clc\n\t"
- "lret $2\n\t"
+ "iret\n\t"
"\n99:\n\t"
"popfw\n\t"
"ljmp *%%cs:real_int15_vector\n\t" )
diff -urN gpxe-0.9.7/src/arch/i386/interface/pxe/pxe_entry.S gpxe-0.9.7-iretfixes/src/arch/i386/interface/pxe/pxe_entry.S
--- gpxe-0.9.7/src/arch/i386/interface/pxe/pxe_entry.S 2009-03-01 21:23:42.000000000 -0500
+++ gpxe-0.9.7-iretfixes/src/arch/i386/interface/pxe/pxe_entry.S 2009-08-21 21:28:41.000000000 -0400
@@ -199,9 +199,12 @@
shll $4, %edx
addl $pxenv, %edx
movw $0x564e, %ax
+ pushw %bp
+ movw %sp, %bp
+ andb $~0x01, 8(%bp) /* Clear CF on return */
+ popw %bp
popfw
- clc
- lret $2
+ iret
1: /* INT 1A,other - pass through */
popfw
ljmp *%cs:pxe_int_1a_vector