[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH 26/43] windbg: implemented windbg_read_context
From: |
Ladi Prosek |
Subject: |
Re: [Qemu-devel] [PATCH 26/43] windbg: implemented windbg_read_context |
Date: |
Tue, 3 Oct 2017 14:32:54 +0200 |
On Tue, Sep 26, 2017 at 1:06 PM, Mihail Abakumov
<address@hidden> wrote:
> Signed-off-by: Mihail Abakumov <address@hidden>
> Signed-off-by: Pavel Dovgalyuk <address@hidden>
> Signed-off-by: Dmitriy Koltunov <address@hidden>
> ---
> windbgstub-utils.c | 90
> +++++++++++++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 89 insertions(+), 1 deletion(-)
>
> diff --git a/windbgstub-utils.c b/windbgstub-utils.c
> index c3ae2ddf5b..23bf4be9f0 100755
> --- a/windbgstub-utils.c
> +++ b/windbgstub-utils.c
> @@ -280,7 +280,95 @@ static KDData *kd;
> static int windbg_read_context(CPUState *cpu, uint8_t *buf, int len,
> int offset)
> {
> - return 0;
> + const bool new_mem = (len != sizeof(CPU_CONTEXT) || offset != 0);
> + CPUArchState *env = cpu->env_ptr;
> + CPU_CONTEXT *cc;
> + int err = 0;
> +
> + if (new_mem) {
> + cc = g_new(CPU_CONTEXT, 1);
> + } else {
> + cc = (CPU_CONTEXT *) buf;
> + }
> +
> + memset(cc, 0, len);
This overruns the buffer if len > sizeof(CPU_CONTEXT).
> +
> + cc->ContextFlags = CPU_CONTEXT_ALL;
> +
> + if (cc->ContextFlags & CPU_CONTEXT_SEGMENTS) {
> + cc->SegCs = lduw_p(&env->segs[R_CS].selector);
> + cc->SegDs = lduw_p(&env->segs[R_DS].selector);
> + cc->SegEs = lduw_p(&env->segs[R_ES].selector);
> + cc->SegFs = lduw_p(&env->segs[R_FS].selector);
> + cc->SegGs = lduw_p(&env->segs[R_GS].selector);
> + cc->SegSs = lduw_p(&env->segs[R_SS].selector);
> + }
> +
> + if (cc->ContextFlags & CPU_CONTEXT_DEBUG_REGISTERS) {
> + cc->Dr0 = ldtul_p(&env->dr[0]);
> + cc->Dr1 = ldtul_p(&env->dr[1]);
> + cc->Dr2 = ldtul_p(&env->dr[2]);
> + cc->Dr3 = ldtul_p(&env->dr[3]);
> + cc->Dr6 = ldtul_p(&env->dr[6]);
> + cc->Dr7 = ldtul_p(&env->dr[7]);
> + }
> +
> + if (cc->ContextFlags & CPU_CONTEXT_INTEGER) {
> + cc->Edi = ldl_p(&env->regs[R_EDI]);
> + cc->Esi = ldl_p(&env->regs[R_ESI]);
> + cc->Ebx = ldl_p(&env->regs[R_EBX]);
> + cc->Edx = ldl_p(&env->regs[R_EDX]);
> + cc->Ecx = ldl_p(&env->regs[R_ECX]);
> + cc->Eax = ldl_p(&env->regs[R_EAX]);
> + cc->Ebp = ldl_p(&env->regs[R_EBP]);
> + cc->Esp = ldl_p(&env->regs[R_ESP]);
> +
> + cc->Eip = ldl_p(&env->eip);
> + cc->EFlags = ldl_p(&env->eflags);
> + }
> +
> + if (cc->ContextFlags & CPU_CONTEXT_FLOATING_POINT) {
> + uint32_t swd = 0, twd = 0;
> + swd = env->fpus & ~(7 << 11);
> + swd |= (env->fpstt & 7) << 11;
> + int i;
> + for (i = 0; i < 8; ++i) {
> + twd |= (!env->fptags[i]) << i;
> + }
> +
> + cc->FloatSave.ControlWord = ldl_p(&env->fpuc);
> + cc->FloatSave.StatusWord = ldl_p(&swd);
> + cc->FloatSave.TagWord = ldl_p(&twd);
> + cc->FloatSave.ErrorOffset = ldl_p(PTR(env->fpip));
> + cc->FloatSave.ErrorSelector = ldl_p(PTR(env->fpip) + 32);
> + cc->FloatSave.DataOffset = ldl_p(PTR(env->fpdp));
> + cc->FloatSave.DataSelector = ldl_p(PTR(env->fpdp) + 32);
> + cc->FloatSave.Cr0NpxState = ldl_p(&env->xcr0);
> +
> + for (i = 0; i < 8; ++i) {
> + memcpy(PTR(cc->FloatSave.RegisterArea[i * 10]),
> + PTR(env->fpregs[i]), 10);
> + }
> + }
> +
> + if (cc->ContextFlags & CPU_CONTEXT_EXTENDED_REGISTERS) {
> + uint8_t *ptr = cc->ExtendedRegisters + 160;
> + int i;
> + for (i = 0; i < 8; ++i, ptr += 16) {
> + stq_p(ptr, env->xmm_regs[i].ZMM_Q(0));
> + stq_p(ptr + 8, env->xmm_regs[i].ZMM_Q(1));
> + }
> +
> + stl_p(cc->ExtendedRegisters + 24, env->mxcsr);
> + }
> +
> + cc->ContextFlags = ldl_p(&cc->ContextFlags);
> +
> + if (new_mem) {
> + memcpy(buf, (uint8_t *) cc + offset, len);
> + g_free(cc);
> + }
> + return err;
> }
>
> static int windbg_write_context(CPUState *cpu, uint8_t *buf, int len,
>
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- Re: [Qemu-devel] [PATCH 26/43] windbg: implemented windbg_read_context,
Ladi Prosek <=