mirror of
https://github.com/xcat2/xcat-dep.git
synced 2024-11-23 18:10:03 +00:00
112 lines
3.4 KiB
Diff
112 lines
3.4 KiB
Diff
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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
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--- gpxe-0.9.7/src/arch/i386/firmware/pcbios/e820mangler.S 2009-03-01 21:23:42.000000000 -0500
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+++ gpxe-0.9.7-iretfixes/src/arch/i386/firmware/pcbios/e820mangler.S 2009-08-21 21:28:41.000000000 -0400
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@@ -490,6 +490,18 @@
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.size get_mangled_e820, . - get_mangled_e820
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/****************************************************************************
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+ * Set/clear CF on the stack as appropriate, assumes stack is as it should
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+ * be immediately before IRET
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+ ****************************************************************************
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+ */
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+patch_cf:
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+ pushw %bp
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+ movw %sp, %bp
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+ setc 8(%bp) /* Set/reset CF; clears PF, AF, ZF, SF */
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+ popw %bp
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+ ret
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+
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+/****************************************************************************
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* INT 15,e820 handler
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****************************************************************************
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*/
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@@ -500,7 +512,8 @@
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popw %ds
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call get_mangled_e820
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popw %ds
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- lret $2
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+ call patch_cf
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+ iret
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.size int15_e820, . - int15_e820
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/****************************************************************************
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@@ -512,7 +525,7 @@
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/* Call previous handler */
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pushfw
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lcall *%cs:int15_vector
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- pushfw
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+ call patch_cf
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/* Edit result */
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pushw %ds
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pushw %cs:rm_ds
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@@ -524,9 +537,7 @@
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xchgw %ax, %cx
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xchgw %bx, %dx
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popw %ds
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- /* Restore flags returned by previous handler and return */
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- popfw
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- lret $2
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+ iret
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.size int15_e801, . - int15_e801
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/****************************************************************************
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@@ -538,16 +549,14 @@
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/* Call previous handler */
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pushfw
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lcall *%cs:int15_vector
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- pushfw
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+ call patch_cf
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/* Edit result */
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pushw %ds
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pushw %cs:rm_ds
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popw %ds
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call patch_1m
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popw %ds
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- /* Restore flags returned by previous handler and return */
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- popfw
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- lret $2
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+ iret
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.size int15_88, . - int15_88
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/****************************************************************************
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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
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--- gpxe-0.9.7/src/arch/i386/firmware/pcbios/fakee820.c 2009-03-01 21:23:42.000000000 -0500
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+++ gpxe-0.9.7-iretfixes/src/arch/i386/firmware/pcbios/fakee820.c 2009-08-21 21:28:41.000000000 -0400
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@@ -63,6 +63,8 @@
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"cmpl $0x534d4150, %%edx\n\t"
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"jne 99f\n\t"
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"pushaw\n\t"
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+ "movw %%sp, %%bp\n\t"
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+ "andb $~0x01, 22(%%bp)\n\t" /* Clear return CF */
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"leaw e820map(%%bx), %%si\n\t"
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"cs rep movsb\n\t"
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"popaw\n\t"
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@@ -73,8 +75,7 @@
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"xorl %%ebx,%%ebx\n\t"
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"\n1:\n\t"
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"popfw\n\t"
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- "clc\n\t"
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- "lret $2\n\t"
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+ "iret\n\t"
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"\n99:\n\t"
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"popfw\n\t"
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"ljmp *%%cs:real_int15_vector\n\t" )
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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
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--- gpxe-0.9.7/src/arch/i386/interface/pxe/pxe_entry.S 2009-03-01 21:23:42.000000000 -0500
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+++ gpxe-0.9.7-iretfixes/src/arch/i386/interface/pxe/pxe_entry.S 2009-08-21 21:28:41.000000000 -0400
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@@ -199,9 +199,12 @@
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shll $4, %edx
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addl $pxenv, %edx
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movw $0x564e, %ax
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+ pushw %bp
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+ movw %sp, %bp
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+ andb $~0x01, 8(%bp) /* Clear CF on return */
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+ popw %bp
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popfw
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- clc
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- lret $2
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+ iret
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1: /* INT 1A,other - pass through */
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popfw
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ljmp *%cs:pxe_int_1a_vector
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