aboutsummaryrefslogtreecommitdiffstats
path: root/com32/mboot/mem.c
diff options
context:
space:
mode:
authorErwan Velu <erwan@enovance.com>2014-01-22 23:57:12 +0100
committerErwan Velu <erwan@enovance.com>2014-01-22 23:57:12 +0100
commit3150c7839640859e8ec6ea0243002309e5f9c068 (patch)
tree275ff162a0252960548013afbe8ff7da7e9cffc0 /com32/mboot/mem.c
parent7a9978f280e1d291f6fac419e7c2a0178e9e5d6b (diff)
downloadsyslinux-3150c7839640859e8ec6ea0243002309e5f9c068.tar.gz
syslinux-3150c7839640859e8ec6ea0243002309e5f9c068.tar.xz
syslinux-3150c7839640859e8ec6ea0243002309e5f9c068.zip
com32sys_t inreg shall be zeroified prior intcall
As per commit f775e740a3a817a4ff5ba26bea99dbfd735456b3, inreg parameters of intcall() shall be zeroified. Having unclean inreg could trigger bad behaviors on some hosts. This patch is about adding memset() calls prior any intcall() : - some intcall didn't had any memset at all - some successive intcall() calls didn't memset inreg in between calls
Diffstat (limited to 'com32/mboot/mem.c')
-rw-r--r--com32/mboot/mem.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/com32/mboot/mem.c b/com32/mboot/mem.c
index 6e3995bf..e42b70ba 100644
--- a/com32/mboot/mem.c
+++ b/com32/mboot/mem.c
@@ -124,6 +124,7 @@ static int mboot_scan_memory(struct AddrRangeDesc **ardp, uint32_t * dosmem)
ard[0].Type = 1;
/* Next try INT 15h AX=E801h */
+ memset(&ireg, 0, sizeof ireg);
ireg.eax.w[0] = 0xe801;
__intcall(0x15, &ireg, &oreg);
@@ -147,6 +148,7 @@ static int mboot_scan_memory(struct AddrRangeDesc **ardp, uint32_t * dosmem)
}
/* Finally try INT 15h AH=88h */
+ memset(&ireg, 0, sizeof ireg);
ireg.eax.w[0] = 0x8800;
if (!(oreg.eflags.l & EFLAGS_CF) && oreg.eax.w[0]) {
ard[1].size = 20;