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| author | Justus Winter <4winter@informatik.uni-hamburg.de> | 2015-05-23 18:51:56 +0200 |
|---|---|---|
| committer | Justus Winter <4winter@informatik.uni-hamburg.de> | 2015-05-23 18:51:56 +0200 |
| commit | 6af2316771841cd4d2770fae00d3d147aa11a5d9 (patch) | |
| tree | b8249bcb86a40abd559883b351019d80eb63096b | |
| parent | 96ade86f9f410cee6377f60530bcc3aa89b20402 (diff) | |
i386: avoid breaking the strict-aliasing rules
* i386/i386/pcb.c (switch_ktss): Cleanly convert the value.
| -rw-r--r-- | i386/i386/pcb.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/i386/i386/pcb.c b/i386/i386/pcb.c index dabe4814..3a0eba0f 100644 --- a/i386/i386/pcb.c +++ b/i386/i386/pcb.c @@ -193,8 +193,14 @@ void switch_ktss(pcb_t pcb) for (i=0; i < USER_GDT_SLOTS; i++) { if (memcmp(gdt_desc_p (mycpu, USER_GDT + (i << 3)), &pcb->ims.user_gdt[i], sizeof pcb->ims.user_gdt[i])) { + union { + struct real_descriptor real_descriptor; + uint64_t descriptor; + } user_gdt; + user_gdt.real_descriptor = pcb->ims.user_gdt[i]; + if (hyp_do_update_descriptor(kv_to_ma(gdt_desc_p (mycpu, USER_GDT + (i << 3))), - *(uint64_t *) &pcb->ims.user_gdt[i])) + user_gdt.descriptor)) panic("couldn't set user gdt %d\n",i); } } |