Get an unsigned byte from guest memory image after translating from
guest virtual to host virtual address and verifying code read
permissions. -Jim
On Thu, Apr 5, 2012 at 1:26 PM, Davide wrote:
> What does "ldub_code(s->pc++);" do???
>
On Wed, Jan 25, 2012 at 11:10 AM, Xin Tong wrote:
> cpu_restore_state() calls gen_intermediate_code_pc() to
> request a retranslation of the TB with extra info to allow
> us to do a host-PC-to-guest-PC lookup
> * Note that gen_intermediate_code_pc() overwrites the generated
> code that already ex
Hello all, I have a quick question that I hope somebody can shed some
light on. Inside of helper functions, can you have a page fault that
must be serviced by the OS? I ask because I cannot see how the cpu
state is restored inside of a helper function. Inside tlb_fill, when
invoked not from a helpe
On Thu, Jan 19, 2012 at 2:32 AM, 陳韋任 wrote:
>> What i mean here is that in gen-icount.h, the icount_decr.u32 field is
>> exhausted and jumps out to the cpu-exec loop. This is where you would
>> fall into tb_add_jump with the second argument being 2, and only if
>> icount_extra was greater than zer
On Tue, Jan 17, 2012 at 7:22 PM, 陳韋任 wrote:
>> previously returned tb. This is usually 0/1. When running icount, you
>> can also get a 2 value in these least significant digits, indicating
>> that the translation block was restarted due to the
>> icount_decr.u16.low field being exhausted but havin
On Tue, Jan 17, 2012 at 7:03 PM, 陳韋任 wrote:
>> if (!tb->jmp_next[n]) { <--- what if n is 2?
>>
>> This is my question, if n is two, it would actually be checking the
>> jmp_first field immediatedly following the jmp_next array in the tb
>> structure. This function only updates the jmp_first field
On Tue, Jan 17, 2012 at 10:50 AM, Peter Maydell
wrote:
> 2012/1/13 James Greensky :
>> Sure, usually a tb chain is setup after a subsequent tb is
>> found/constructed in the loop in cpu_exec when a tb returns.
>> Taken/non-taken branch chaining is implemented by indicating th
On Tue, Jan 17, 2012 at 7:06 AM, 陳韋任 wrote:
>> a jump with the least significant bits = 2. This falls through to tb
>> add jump, which then updates the jmp_first field of the current tb.
>
> I don't know if tb_add_jump's second parameter will be two or not, but
> look at TranslationBlock (exec-al
; On Thu, Jan 12, 2012 at 11:00:43AM -0800, James Greensky wrote:
>> Hello all, I have a question about icount and tb chaining that I hope
>> somebody can clear up. In cpu-exec.c, when the icount_decr.u16.low
>> counter expires, it passes back the current tb as the next_tb and ad
Hello all, I have a question about icount and tb chaining that I hope
somebody can clear up. In cpu-exec.c, when the icount_decr.u16.low
counter expires, it passes back the current tb as the next_tb and add
a jump with the least significant bits = 2. This falls through to tb
add jump, which then u
Hello all, I have a question about icount and tb chaining that I hope
somebody can clear up. In cpu-exec.c, when the icount_decr.u16.low
counter expires, it passes back the current tb as the next_tb and add
a jump with the least significant bits = 2. This falls through to tb
add jump, which then u
You want to hook the tcg_gen_qemu_ functions such as tcg_gen_qemu_ld8s in
tcg-op.h
Jim
On Sat, Feb 26, 2011 at 8:25 AM, felix.matenaar@rwth-aachen <
felix.maten...@rwth-aachen.de> wrote:
> Hi *,
>
> i am currently trying to trace guest memory access (i386-softmmu). tcg
> README says tcg_gen_(st|
Hello, I am attempting to fold a cache model into Qemu. For this I need to
store the instructions executed between actual lds/sts to Qemu memory, for
performance reasons. I figured that a buffer in the CPUState
could accommodate this requirement, however tcg only gives the ability to
ld/st from h
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