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[Qemu-devel] [RESEND #2][PATCH] i386: Catch all non-present ptes in cpu_
From: |
Jan Kiszka |
Subject: |
[Qemu-devel] [RESEND #2][PATCH] i386: Catch all non-present ptes in cpu_get_phys_page_debug |
Date: |
Sun, 13 Jul 2008 14:43:00 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
It helps debugging guests when yet unmapped pages are correctly reported
as, well, unmapped.
Signed-off-by: Jan Kiszka <address@hidden>
---
target-i386/helper.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
Index: b/target-i386/helper.c
===================================================================
--- a/target-i386/helper.c
+++ b/target-i386/helper.c
@@ -1192,6 +1192,8 @@ target_phys_addr_t cpu_get_phys_page_deb
page_size = 4096;
pte = ldq_phys(pte_addr);
}
+ if (!(pte & PG_PRESENT_MASK))
+ return -1;
} else {
uint32_t pde;
@@ -1211,10 +1213,10 @@ target_phys_addr_t cpu_get_phys_page_deb
/* page directory entry */
pte_addr = ((pde & ~0xfff) + ((addr >> 10) & 0xffc)) &
env->a20_mask;
pte = ldl_phys(pte_addr);
- if (!(pte & PG_PRESENT_MASK))
- return -1;
page_size = 4096;
}
+ if (!(pte & PG_PRESENT_MASK))
+ return -1;
}
pte = pte & env->a20_mask;
}