|
| From: | Mikhail Abakumov |
| Subject: | [Qemu-devel] [PATCH 24/39] windbg: [de]serialization cpu context |
| Date: | Thu, 29 Nov 2018 17:29:45 +0300 |
| User-agent: | StGit/0.17.1-dirty |
Signed-off-by: Mikhail Abakumov <address@hidden>
Signed-off-by: Pavel Dovgalyuk <address@hidden>
---
target/i386/windbgstub.c | 374 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 372 insertions(+), 2 deletions(-)
diff --git a/target/i386/windbgstub.c b/target/i386/windbgstub.c
index 03807ce63e..60323a9369 100644
--- a/target/i386/windbgstub.c
+++ b/target/i386/windbgstub.c
@@ -280,7 +280,6 @@ static InitedAddr kdDebuggerDataBlock;
static InitedAddr kdVersion;
#endif /* TARGET_I386 */
-__attribute__ ((unused)) /* unused yet */
static void windbg_set_dr(CPUState *cs, int index, target_ulong value)
{
X86CPU *cpu = X86_CPU(cs);
@@ -300,7 +299,6 @@ static void windbg_set_dr(CPUState *cs, int index,
target_ulong value)
}
/* copy from gdbstub.c */
-__attribute__ ((unused)) /* unused yet */
static void windbg_set_sr(CPUState *cs, int sreg, uint16_t selector)
{
X86CPU *cpu = X86_CPU(cs);
@@ -403,6 +401,378 @@ static void windbg_set_sr(CPUState *cs, int sreg,
uint16_t selector)
CASE_FIELD(srct, field, field_size, block)
#endif /* TARGET_I386 */
+#define GEN_WINDBG_CONTEXT_RW(fun_name, is_read)
\
+static int fun_name(CPUState *cs, uint8_t *buf, int buf_size,
\
+ int offset, int len)
\
+{
\
+ X86CPU *cpu = X86_CPU(cs);
\
+ CPUX86State *env = &cpu->env;
\
+ uint32_t ctx_flags = CPU_CONTEXT_ALL;
\
+ uint32_t tmp32, i;
\
+ uint32_t f_size = 0;
\
+
\
+ if (len < 0 || len > buf_size) {
\
+ WINDBG_ERROR("" #fun_name ": incorrect length %d", len);
\
+ return 1;
\
+ }
\
+
\
+ if (offset < 0 || offset + len > sizeof(CPU_CONTEXT)) {
\
+ WINDBG_ERROR("" #fun_name ": incorrect offset %d", offset);
\
+ return 2;
\
+ }
\
+
\
+ len = MIN(len, sizeof(CPU_CONTEXT) - offset);
\
+
\
+ while (offset < len) {
\
+ switch (offset) {
\
+ CASE_FIELD(CPU_CONTEXT, ContextFlags, f_size, {
\
+ rwl_p(buf, ctx_flags, is_read);
\
+ });
\
+ /* DEBUG REGISTERS */
\
+ CASE_FIELD(CPU_CONTEXT, Dr0, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_DEBUG_REGISTERS) {
\
+ RW_DR(buf, cs, 0, is_read);
\
+ }
\
+ });
\
+ CASE_FIELD(CPU_CONTEXT, Dr1, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_DEBUG_REGISTERS) {
\
+ RW_DR(buf, cs, 1, is_read);
\
+ }
\
+ });
\
+ CASE_FIELD(CPU_CONTEXT, Dr2, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_DEBUG_REGISTERS) {
\
+ RW_DR(buf, cs, 2, is_read);
\
+ }
\
+ });
\
+ CASE_FIELD(CPU_CONTEXT, Dr3, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_DEBUG_REGISTERS) {
\
+ RW_DR(buf, cs, 3, is_read);
\
+ }
\
+ });
\
+ CASE_FIELD(CPU_CONTEXT, Dr6, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_DEBUG_REGISTERS) {
\
+ RW_DR(buf, cs, 6, is_read);
\
+ }
\
+ });
\
+ CASE_FIELD(CPU_CONTEXT, Dr7, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_DEBUG_REGISTERS) {
\
+ RW_DR(buf, cs, 7, is_read);
\
+ }
\
+ });
\
+ /* SEGMENT REGISTERS */
\
+ CASE_FIELD(CPU_CONTEXT, SegCs, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_SEGMENTS) {
\
+ RW_SR(buf, cs, R_CS, is_read);
\
+ }
\
+ });
\
+ CASE_FIELD(CPU_CONTEXT, SegDs, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_SEGMENTS) {
\
+ RW_SR(buf, cs, R_DS, is_read);
\
+ }
\
+ });
\
+ CASE_FIELD(CPU_CONTEXT, SegEs, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_SEGMENTS) {
\
+ RW_SR(buf, cs, R_ES, is_read);
\
+ }
\
+ });
\
+ CASE_FIELD(CPU_CONTEXT, SegFs, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_SEGMENTS) {
\
+ RW_SR(buf, cs, R_FS, is_read);
\
+ }
\
+ });
\
+ CASE_FIELD(CPU_CONTEXT, SegGs, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_SEGMENTS) {
\
+ RW_SR(buf, cs, R_GS, is_read);
\
+ }
\
+ });
\
+ CASE_FIELD(CPU_CONTEXT, SegSs, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_SEGMENTS) {
\
+ RW_SR(buf, cs, R_SS, is_read);
\
+ }
\
+ });
\
+ /* INTEGER REGISTERS */
\
+ CASE_FIELD_X32_64(CPU_CONTEXT, Eax, Rax, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_INTEGER) {
\
+ rwtul_p(buf, env->regs[R_EAX], is_read);
\
+ }
\
+ });
\
+ CASE_FIELD_X32_64(CPU_CONTEXT, Ecx, Rcx, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_INTEGER) {
\
+ rwtul_p(buf, env->regs[R_ECX], is_read);
\
+ }
\
+ });
\
+ CASE_FIELD_X32_64(CPU_CONTEXT, Edx, Rdx, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_INTEGER) {
\
+ rwtul_p(buf, env->regs[R_EDX], is_read);
\
+ }
\
+ });
\
+ CASE_FIELD_X32_64(CPU_CONTEXT, Ebx, Rbx, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_INTEGER) {
\
+ rwtul_p(buf, env->regs[R_EBX], is_read);
\
+ }
\
+ });
\
+ CASE_FIELD_X32_64(CPU_CONTEXT, Esi, Rsi, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_INTEGER) {
\
+ rwtul_p(buf, env->regs[R_ESI], is_read);
\
+ }
\
+ });
\
+ CASE_FIELD_X32_64(CPU_CONTEXT, Edi, Rdi, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_INTEGER) {
\
+ rwtul_p(buf, env->regs[R_EDI], is_read);
\
+ }
\
+ });
\
+ CASE_FIELD_X64(CPU_CONTEXT, R8, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_INTEGER) {
\
+ rwtul_p(buf, env->regs[8], is_read);
\
+ }
\
+ });
\
+ CASE_FIELD_X64(CPU_CONTEXT, R9, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_INTEGER) {
\
+ rwtul_p(buf, env->regs[9], is_read);
\
+ }
\
+ });
\
+ CASE_FIELD_X64(CPU_CONTEXT, R10, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_INTEGER) {
\
+ rwtul_p(buf, env->regs[10], is_read);
\
+ }
\
+ });
\
+ CASE_FIELD_X64(CPU_CONTEXT, R11, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_INTEGER) {
\
+ rwtul_p(buf, env->regs[11], is_read);
\
+ }
\
+ });
\
+ CASE_FIELD_X64(CPU_CONTEXT, R12, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_INTEGER) {
\
+ rwtul_p(buf, env->regs[12], is_read);
\
+ }
\
+ });
\
+ CASE_FIELD_X64(CPU_CONTEXT, R13, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_INTEGER) {
\
+ rwtul_p(buf, env->regs[13], is_read);
\
+ }
\
+ });
\
+ CASE_FIELD_X64(CPU_CONTEXT, R14, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_INTEGER) {
\
+ rwtul_p(buf, env->regs[14], is_read);
\
+ }
\
+ });
\
+ CASE_FIELD_X64(CPU_CONTEXT, R15, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_INTEGER) {
\
+ rwtul_p(buf, env->regs[15], is_read);
\
+ }
\
+ });
\
+ /* CONTROL REGISTERS */
\
+ CASE_FIELD_X32_64(CPU_CONTEXT, Esp, Rsp, f_size, {
\
+ if (ctx_flags & CONTEXT_CONTROL) {
\
+ rwtul_p(buf, env->regs[R_ESP], is_read);
\
+ }
\
+ });
\
+ CASE_FIELD_X32_64(CPU_CONTEXT, Ebp, Rbp, f_size, {
\
+ if (ctx_flags & CONTEXT_CONTROL) {
\
+ rwtul_p(buf, env->regs[R_EBP], is_read);
\
+ }
\
+ });
\
+ CASE_FIELD_X32_64(CPU_CONTEXT, Eip, Rip, f_size, {
\
+ if (ctx_flags & CONTEXT_CONTROL) {
\
+ rwtul_p(buf, env->eip, is_read);
\
+ }
\
+ });
\
+ CASE_FIELD(CPU_CONTEXT, EFlags, f_size, {
\
+ if (ctx_flags & CONTEXT_CONTROL) {
\
+ rwl_p(buf, env->eflags, is_read);
\
+ }
\
+ });
\
+ /* FLOAT REGISTERS */
\
+ CASE_FIELD(CPU_CONTEXT, FloatSave.ControlWord, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_FLOATING_POINT) {
\
+ if (is_read) {
\
+ cpu_set_fpuc(env, TARGET_SAFE(ldl_p, lduw_p)(buf));
\
+ } else {
\
+ TARGET_SAFE(stl_p, stw_p)(buf, env->fpuc);
\
+ }
\
+ }
\
+ });
\
+ CASE_FIELD(CPU_CONTEXT, FloatSave.StatusWord, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_FLOATING_POINT) {
\
+ if (is_read) {
\
+ tmp32 = TARGET_SAFE(ldl_p, lduw_p)(buf);
\
+ env->fpstt = (tmp32 >> 11) & 7;
\
+ env->fpus = tmp32 & ~0x3800;
\
+ } else {
\
+ tmp32 = env->fpus & ~(7 << 11);
\
+ tmp32 |= (env->fpstt & 7) << 11;
\
+ TARGET_SAFE(stl_p, stw_p)(buf, tmp32);
\
+ }
\
+ }
\
+ });
\
+ CASE_FIELD(CPU_CONTEXT, FloatSave.TagWord, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_FLOATING_POINT) {
\
+ if (is_read) {
\
+ tmp32 = TARGET_SAFE(ldl_p(buf), buf[0]);
\
+ for (i = 0; i < 8; ++i) {
\
+ env->fptags[i] = !((tmp32 >> i) & 1);
\
+ }
\
+ } else {
\
+ tmp32 = 0;
\
+ for (i = 0; i < 8; ++i) {
\
+ tmp32 |= (!env->fptags[i]) << i;
\
+ }
\
+ TARGET_SAFE(stl_p, stb_p)(buf, tmp32);
\
+ }
\
+ }
\
+ });
\
+ CASE_FIELD_X64(CPU_CONTEXT, FloatSave.Reserved1, f_size, {});
\
+ CASE_FIELD_X64(CPU_CONTEXT, FloatSave.ErrorOpcode, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_FLOATING_POINT) {
\
+ rwuw_p(buf, env->fpop, is_read);
\
+ }
\
+ });
\
+ CASE_FIELD(CPU_CONTEXT, FloatSave.ErrorOffset, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_FLOATING_POINT) {
\
+ if (is_read) {
\
+ env->fpip &= ~0xffffffffL;
\
+ env->fpip |= ldl_p(buf);
\
+ } else {
\
+ stl_p(buf, env->fpip & 0xffffffff);
\
+ }
\
+ }
\
+ });
\
+ CASE_FIELD(CPU_CONTEXT, FloatSave.ErrorSelector, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_FLOATING_POINT) {
\
+ if (is_read) {
\
+ env->fpip &= 0xffffffffL;
\
+ env->fpip |= ((uint64_t) ldl_p(buf)) << 32;
\
+ } else {
\
+ stl_p(buf, (env->fpip >> 32) & 0xffffffff);
\
+ }
\
+ }
\
+ });
\
+ CASE_FIELD_X64(CPU_CONTEXT, FloatSave.Reserved2, f_size, {});
\
+ CASE_FIELD(CPU_CONTEXT, FloatSave.DataOffset, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_FLOATING_POINT) {
\
+ if (is_read) {
\
+ env->fpdp &= ~0xffffffffL;
\
+ env->fpdp |= ldl_p(buf);
\
+ } else {
\
+ stl_p(buf, env->fpdp & 0xffffffff);
\
+ }
\
+ }
\
+ });
\
+ CASE_FIELD(CPU_CONTEXT, FloatSave.DataSelector, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_FLOATING_POINT) {
\
+ if (is_read) {
\
+ env->fpdp &= 0xffffffffL;
\
+ env->fpdp |= ((uint64_t) ldl_p(buf)) << 32;
\
+ } else {
\
+ stl_p(buf, (env->fpdp >> 32) & 0xffffffff);
\
+ }
\
+ }
\
+ });
\
+ CASE_FIELD_X64(CPU_CONTEXT, FloatSave.Reserved3, f_size, {});
\
+ CASE_FIELD_X32(CPU_CONTEXT, FloatSave.Cr0NpxState, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_FLOATING_POINT) {
\
+ rwl_p(buf, env->xcr0, is_read);
\
+ }
\
+ });
\
+ CASE_FIELD_X64(CPU_CONTEXT, FloatSave.MxCsr, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_FLOATING_POINT) {
\
+ rwl_p(buf, env->mxcsr, is_read);
\
+ }
\
+ });
\
+ CASE_FIELD_X64(CPU_CONTEXT, FloatSave.MxCsr_Mask, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_FLOATING_POINT) {
\
+ /* FIXME: this is unimplemented in qemu? */
\
+ /* rwl_p(buf, env->mxcsr_mask, is_read); */
\
+ }
\
+ });
\
+ CASE_FIELD_X32_64(CPU_CONTEXT, FloatSave.RegisterArea,
\
+ FloatSave.FloatRegisters, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_FLOATING_POINT) {
\
+ uint8_t *mem = buf;
\
+ for (i = 0; i < 8; ++i, mem += TARGET_SAFE(10, 16)) {
\
+ floatx80 fl = env->fpregs[i].d;
\
+ if (is_read) {
\
+ fl.low = ldq_p(mem);
\
+ fl.high = TARGET_SAFE(lduw_p, ldq_p)(mem + 8);
\
+ } else {
\
+ stq_p(mem, fl.low);
\
+ TARGET_SAFE(stw_p, stq_p)(mem + 8, fl.high);
\
+ }
\
+ }
\
+ }
\
+ });
\
+ CASE_FIELD_X64(CPU_CONTEXT, FloatSave.XmmRegisters, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_FLOATING_POINT) {
\
+ uint8_t *mem = buf;
\
+ if (is_read) {
\
+ for (i = 0; i < CPU_NB_REGS; ++i, mem += 16) {
\
+ env->xmm_regs[i].ZMM_Q(0) = ldl_p(mem);
\
+ env->xmm_regs[i].ZMM_Q(1) = ldl_p(mem + 8);
\
+ }
\
+ } else {
\
+ for (i = 0; i < CPU_NB_REGS; ++i, mem += 16) {
\
+ stq_p(mem, env->xmm_regs[i].ZMM_Q(0));
\
+ stq_p(mem + 8, env->xmm_regs[i].ZMM_Q(1));
\
+ }
\
+ }
\
+ }
\
+ });
\
+ CASE_FIELD_X64(CPU_CONTEXT, FloatSave.Reserved4, f_size, {});
\
+ /* EXTENDED REGISTERS I386 */
\
+ CASE_FIELD_X32(CPU_CONTEXT, ExtendedRegisters, f_size, {
\
+ if (ctx_flags & CPU_CONTEXT_EXTENDED_REGISTERS) {
\
+ uint8_t *mem = buf + 160;
\
+ if (is_read) {
\
+ for (i = 0; i < CPU_NB_REGS; ++i, mem += 16) {
\
+ env->xmm_regs[i].ZMM_Q(0) = ldl_p(mem);
\
+ env->xmm_regs[i].ZMM_Q(1) = ldl_p(mem + 8);
\
+ }
\
+ cpu_set_mxcsr(env, ldl_p(mem + 24));
\
+ } else {
\
+ for (i = 0; i < CPU_NB_REGS; ++i, mem += 16) {
\
+ stq_p(mem, env->xmm_regs[i].ZMM_Q(0));
\
+ stq_p(mem + 8, env->xmm_regs[i].ZMM_Q(1));
\
+ }
\
+ stl_p(mem + 24, env->mxcsr);
\
+ }
\
+ }
\
+ });
\
+ /* UNKNOWN REGISTERS */
\
+ CASE_FIELD_X64(CPU_CONTEXT, P1Home, f_size, {});
\
+ CASE_FIELD_X64(CPU_CONTEXT, P2Home, f_size, {});
\
+ CASE_FIELD_X64(CPU_CONTEXT, P3Home, f_size, {});
\
+ CASE_FIELD_X64(CPU_CONTEXT, P4Home, f_size, {});
\
+ CASE_FIELD_X64(CPU_CONTEXT, P5Home, f_size, {});
\
+ CASE_FIELD_X64(CPU_CONTEXT, P6Home, f_size, {});
\
+ CASE_FIELD_X64(CPU_CONTEXT, MxCsr, f_size, {
\
+ if (is_read) {
\
+ cpu_set_mxcsr(env, ldl_p(buf));
\
+ } else {
\
+ stl_p(buf, env->mxcsr);
\
+ }
\
+ });
\
+ CASE_FIELD_X64(CPU_CONTEXT, VectorRegister, f_size, {});
\
+ CASE_FIELD_X64(CPU_CONTEXT, VectorControl, f_size, {});
\
+ CASE_FIELD_X64(CPU_CONTEXT, DebugControl, f_size, {});
\
+ CASE_FIELD_X64(CPU_CONTEXT, LastBranchToRip, f_size, {});
\
+ CASE_FIELD_X64(CPU_CONTEXT, LastBranchFromRip, f_size, {});
\
+ CASE_FIELD_X64(CPU_CONTEXT, LastExceptionToRip, f_size, {});
\
+ CASE_FIELD_X64(CPU_CONTEXT, LastExceptionFromRip, f_size, {});
\
+ default:
\
+ f_size = 1;
\
+ }
\
+ offset += f_size;
\
+ buf += f_size;
\
+ }
\
+ return 0;
\
+}
+
+__attribute__ ((unused)) /* unused yet */
+GEN_WINDBG_CONTEXT_RW(windbg_read_context, false)
+
+__attribute__ ((unused)) /* unused yet */
+GEN_WINDBG_CONTEXT_RW(windbg_write_context, true)
+
static bool find_KPCR(CPUState *cs)
{
X86CPU *cpu = X86_CPU(cs);
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