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Re: [Qemu-devel] PC value translation from guest VA to host VA.
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From: |
Hu Tao |
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Subject: |
Re: [Qemu-devel] PC value translation from guest VA to host VA. |
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Date: |
Thu, 13 Feb 2014 09:48:58 +0800 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Wed, Feb 12, 2014 at 05:42:00PM +0530, Gaurav Sharma wrote:
> To elaborate a bit more ...
> If the target is arm, in disas_arm_insn function we fetch the opcode as per
> the
> pc value :
> insn = arm_ldl_code(env, s->pc, s->bswap_code)
>
> This PC value i could trace back and see actually come from the cpu register
> set for arm regs[15]. which is the pc value.
> Is this PC value a target virtual address or the host virtual address ?
> How is the translation done ?
It's target virtual address, translated to target physical address by
softmmu. Target physical address is mapped to host virtual address by
qemu memory model, see docs/memory.txt.