server: Remove some no longer needed ptrace code to set registers.
Also make sure the debug registers are properly copied to the context when set.
This commit is contained in:
Alexandre Julliard
parent
2bfe47e852
commit
f6cb551d7f
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@ -58,19 +58,6 @@
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# endif
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#endif
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#ifndef PTRACE_GETREGS
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#define PTRACE_GETREGS PT_GETREGS
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#endif
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#ifndef PTRACE_GETFPREGS
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#define PTRACE_GETFPREGS PT_GETFPREGS
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#endif
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#ifndef PTRACE_SETREGS
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#define PTRACE_SETREGS PT_SETREGS
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#endif
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#ifndef PTRACE_SETFPREGS
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#define PTRACE_SETFPREGS PT_SETFPREGS
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#endif
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#ifdef PT_GETDBREGS
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#define PTRACE_GETDBREGS PT_GETDBREGS
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#endif
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@ -84,18 +71,6 @@
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# include <sys/user.h>
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#endif
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/* user_regs definitions from asm/user.h */
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struct kernel_user_regs_struct
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{
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long ebx, ecx, edx, esi, edi, ebp, eax;
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unsigned short ds, __ds, es, __es;
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unsigned short fs, __fs, gs, __gs;
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long orig_eax, eip;
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unsigned short cs, __cs;
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long eflags, esp;
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unsigned short ss, __ss;
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};
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/* debug register offset in struct user */
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#define DR_OFFSET(dr) ((int)((((struct user *)0)->u_debugreg) + (dr)))
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@ -114,390 +89,122 @@ static inline int get_debug_reg( int pid, int num, DWORD *data )
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return 0;
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}
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/* retrieve a thread context */
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static void get_thread_context_ptrace( struct thread *thread, unsigned int flags, CONTEXT *context )
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/* retrieve the thread x86 debug registers */
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static int get_thread_debug_regs( struct thread *thread, CONTEXT *context )
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{
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int pid = get_ptrace_pid(thread);
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if (flags & CONTEXT_FULL)
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{
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struct kernel_user_regs_struct regs;
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if (ptrace( PTRACE_GETREGS, pid, 0, ®s ) == -1) goto error;
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if (flags & CONTEXT_INTEGER)
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{
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context->Eax = regs.eax;
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context->Ebx = regs.ebx;
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context->Ecx = regs.ecx;
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context->Edx = regs.edx;
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context->Esi = regs.esi;
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context->Edi = regs.edi;
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}
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if (flags & CONTEXT_CONTROL)
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{
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context->Ebp = regs.ebp;
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context->Esp = regs.esp;
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context->Eip = regs.eip;
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context->SegCs = regs.cs;
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context->SegSs = regs.ss;
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context->EFlags = regs.eflags;
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}
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if (flags & CONTEXT_SEGMENTS)
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{
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context->SegDs = regs.ds;
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context->SegEs = regs.es;
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context->SegFs = regs.fs;
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context->SegGs = regs.gs;
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}
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context->ContextFlags |= flags & CONTEXT_FULL;
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}
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if (flags & CONTEXT_DEBUG_REGISTERS)
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{
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if (get_debug_reg( pid, 0, &context->Dr0 ) == -1) goto error;
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if (get_debug_reg( pid, 1, &context->Dr1 ) == -1) goto error;
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if (get_debug_reg( pid, 2, &context->Dr2 ) == -1) goto error;
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if (get_debug_reg( pid, 3, &context->Dr3 ) == -1) goto error;
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if (get_debug_reg( pid, 6, &context->Dr6 ) == -1) goto error;
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if (get_debug_reg( pid, 7, &context->Dr7 ) == -1) goto error;
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context->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
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}
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if (flags & CONTEXT_FLOATING_POINT)
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{
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/* we can use context->FloatSave directly as it is using the */
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/* correct structure (the same as fsave/frstor) */
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if (ptrace( PTRACE_GETFPREGS, pid, 0, &context->FloatSave ) == -1) goto error;
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context->FloatSave.Cr0NpxState = 0; /* FIXME */
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context->ContextFlags |= CONTEXT_FLOATING_POINT;
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}
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return;
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if (get_debug_reg( pid, 0, &context->Dr0 ) == -1) goto error;
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if (get_debug_reg( pid, 1, &context->Dr1 ) == -1) goto error;
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if (get_debug_reg( pid, 2, &context->Dr2 ) == -1) goto error;
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if (get_debug_reg( pid, 3, &context->Dr3 ) == -1) goto error;
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if (get_debug_reg( pid, 6, &context->Dr6 ) == -1) goto error;
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if (get_debug_reg( pid, 7, &context->Dr7 ) == -1) goto error;
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return 1;
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error:
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file_set_error();
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return 0;
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}
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/* set a thread context */
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static void set_thread_context_ptrace( struct thread *thread, unsigned int flags, const CONTEXT *context )
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/* set the thread x86 debug registers */
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static int set_thread_debug_regs( struct thread *thread, const CONTEXT *context )
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{
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int pid = get_ptrace_pid(thread);
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if (flags & CONTEXT_FULL)
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{
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struct kernel_user_regs_struct regs;
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/* need to preserve some registers (at a minimum orig_eax must always be preserved) */
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if (ptrace( PTRACE_GETREGS, pid, 0, ®s ) == -1) goto error;
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if (flags & CONTEXT_INTEGER)
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{
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regs.eax = context->Eax;
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regs.ebx = context->Ebx;
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regs.ecx = context->Ecx;
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regs.edx = context->Edx;
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regs.esi = context->Esi;
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regs.edi = context->Edi;
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}
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if (flags & CONTEXT_CONTROL)
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{
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regs.ebp = context->Ebp;
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regs.esp = context->Esp;
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regs.eip = context->Eip;
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regs.cs = context->SegCs;
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regs.ss = context->SegSs;
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regs.eflags = context->EFlags;
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}
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if (flags & CONTEXT_SEGMENTS)
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{
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regs.ds = context->SegDs;
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regs.es = context->SegEs;
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regs.fs = context->SegFs;
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regs.gs = context->SegGs;
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}
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if (ptrace( PTRACE_SETREGS, pid, 0, ®s ) == -1) goto error;
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}
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if (flags & CONTEXT_DEBUG_REGISTERS)
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{
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if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(0), context->Dr0 ) == -1) goto error;
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if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(1), context->Dr1 ) == -1) goto error;
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if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(2), context->Dr2 ) == -1) goto error;
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if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(3), context->Dr3 ) == -1) goto error;
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if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(6), context->Dr6 ) == -1) goto error;
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if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->Dr7 ) == -1) goto error;
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}
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if (flags & CONTEXT_FLOATING_POINT)
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{
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/* we can use context->FloatSave directly as it is using the */
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/* correct structure (the same as fsave/frstor) */
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if (ptrace( PTRACE_SETFPREGS, pid, 0, &context->FloatSave ) == -1) goto error;
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}
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return;
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error:
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file_set_error();
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}
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#elif defined(__sun) || defined(__sun__)
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/* retrieve a thread context */
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static void get_thread_context_ptrace( struct thread *thread, unsigned int flags, CONTEXT *context )
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{
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int pid = get_ptrace_pid(thread);
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if (flags & CONTEXT_FULL)
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{
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struct regs regs;
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if (ptrace( PTRACE_GETREGS, pid, (int) ®s, 0 ) == -1) goto error;
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if (flags & CONTEXT_INTEGER)
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{
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context->Eax = regs.r_eax;
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context->Ebx = regs.r_ebx;
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context->Ecx = regs.r_ecx;
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context->Edx = regs.r_edx;
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context->Esi = regs.r_esi;
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context->Edi = regs.r_edi;
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}
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if (flags & CONTEXT_CONTROL)
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{
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context->Ebp = regs.r_ebp;
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context->Esp = regs.r_esp;
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context->Eip = regs.r_eip;
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context->SegCs = regs.r_cs & 0xffff;
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context->SegSs = regs.r_ss & 0xffff;
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context->EFlags = regs.r_efl;
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}
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if (flags & CONTEXT_SEGMENTS)
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{
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context->SegDs = regs.r_ds & 0xffff;
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context->SegEs = regs.r_es & 0xffff;
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context->SegFs = regs.r_fs & 0xffff;
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context->SegGs = regs.r_gs & 0xffff;
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}
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context->ContextFlags |= flags & CONTEXT_FULL;
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}
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if (flags & CONTEXT_DEBUG_REGISTERS)
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{
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/* FIXME: How is this done on Solaris? */
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}
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if (flags & CONTEXT_FLOATING_POINT)
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{
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/* we can use context->FloatSave directly as it is using the */
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/* correct structure (the same as fsave/frstor) */
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if (ptrace( PTRACE_GETFPREGS, pid, (int) &context->FloatSave, 0 ) == -1) goto error;
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context->FloatSave.Cr0NpxState = 0; /* FIXME */
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context->ContextFlags |= CONTEXT_FLOATING_POINT;
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}
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return;
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error:
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file_set_error();
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}
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/* set a thread context */
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static void set_thread_context_ptrace( struct thread *thread, unsigned int flags, const CONTEXT *context )
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{
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int pid = get_ptrace_pid(thread);
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if (flags & CONTEXT_FULL)
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{
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struct regs regs;
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if (((flags | CONTEXT_i386) & CONTEXT_FULL) != CONTEXT_FULL)
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{
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/* need to preserve some registers */
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if (ptrace( PTRACE_GETREGS, pid, (int) ®s, 0 ) == -1) goto error;
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}
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if (flags & CONTEXT_INTEGER)
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{
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regs.r_eax = context->Eax;
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regs.r_ebx = context->Ebx;
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regs.r_ecx = context->Ecx;
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regs.r_edx = context->Edx;
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regs.r_esi = context->Esi;
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regs.r_edi = context->Edi;
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}
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if (flags & CONTEXT_CONTROL)
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{
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regs.r_ebp = context->Ebp;
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regs.r_esp = context->Esp;
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regs.r_eip = context->Eip;
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regs.r_cs = context->SegCs;
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regs.r_ss = context->SegSs;
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regs.r_efl = context->EFlags;
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}
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if (flags & CONTEXT_SEGMENTS)
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{
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regs.r_ds = context->SegDs;
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regs.r_es = context->SegEs;
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regs.r_fs = context->SegFs;
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regs.r_gs = context->SegGs;
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}
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if (ptrace( PTRACE_SETREGS, pid, (int) ®s, 0 ) == -1) goto error;
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}
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if (flags & CONTEXT_DEBUG_REGISTERS)
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{
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/* FIXME: How is this done on Solaris? */
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}
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if (flags & CONTEXT_FLOATING_POINT)
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{
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/* we can use context->FloatSave directly as it is using the */
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/* correct structure (the same as fsave/frstor) */
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if (ptrace( PTRACE_SETFPREGS, pid, (int) &context->FloatSave, 0 ) == -1) goto error;
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}
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return;
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if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(0), context->Dr0 ) == -1) goto error;
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if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(1), context->Dr1 ) == -1) goto error;
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if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(2), context->Dr2 ) == -1) goto error;
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if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(3), context->Dr3 ) == -1) goto error;
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if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(6), context->Dr6 ) == -1) goto error;
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if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->Dr7 ) == -1) goto error;
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return 1;
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error:
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file_set_error();
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return 0;
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}
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#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__NetBSD__)
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#include <machine/reg.h>
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/* retrieve a thread context */
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static void get_thread_context_ptrace( struct thread *thread, unsigned int flags, CONTEXT *context )
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/* retrieve the thread x86 debug registers */
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static int get_thread_debug_regs( struct thread *thread, CONTEXT *context )
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{
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int pid = get_ptrace_pid(thread);
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if (flags & CONTEXT_FULL)
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{
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struct reg regs;
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if (ptrace( PTRACE_GETREGS, pid, (caddr_t) ®s, 0 ) == -1) goto error;
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if (flags & CONTEXT_INTEGER)
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{
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context->Eax = regs.r_eax;
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context->Ebx = regs.r_ebx;
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context->Ecx = regs.r_ecx;
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context->Edx = regs.r_edx;
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context->Esi = regs.r_esi;
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context->Edi = regs.r_edi;
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}
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if (flags & CONTEXT_CONTROL)
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{
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context->Ebp = regs.r_ebp;
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context->Esp = regs.r_esp;
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context->Eip = regs.r_eip;
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context->SegCs = regs.r_cs & 0xffff;
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context->SegSs = regs.r_ss & 0xffff;
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context->EFlags = regs.r_eflags;
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}
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if (flags & CONTEXT_SEGMENTS)
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{
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context->SegDs = regs.r_ds & 0xffff;
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context->SegEs = regs.r_es & 0xffff;
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context->SegFs = regs.r_fs & 0xffff;
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context->SegGs = regs.r_gs & 0xffff;
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}
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context->ContextFlags |= flags & CONTEXT_FULL;
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}
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if (flags & CONTEXT_DEBUG_REGISTERS)
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{
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#ifdef PTRACE_GETDBREGS
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struct dbreg dbregs;
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if (ptrace( PTRACE_GETDBREGS, pid, (caddr_t) &dbregs, 0 ) == -1)
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goto error;
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#ifdef DBREG_DRX
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/* needed for FreeBSD, the structure fields have changed under 5.x */
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context->Dr0 = DBREG_DRX((&dbregs), 0);
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context->Dr1 = DBREG_DRX((&dbregs), 1);
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context->Dr2 = DBREG_DRX((&dbregs), 2);
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context->Dr3 = DBREG_DRX((&dbregs), 3);
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context->Dr6 = DBREG_DRX((&dbregs), 6);
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context->Dr7 = DBREG_DRX((&dbregs), 7);
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#else
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context->Dr0 = dbregs.dr0;
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context->Dr1 = dbregs.dr1;
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context->Dr2 = dbregs.dr2;
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context->Dr3 = dbregs.dr3;
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context->Dr6 = dbregs.dr6;
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context->Dr7 = dbregs.dr7;
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#endif
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context->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
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#endif
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}
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if (flags & CONTEXT_FLOATING_POINT)
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{
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/* we can use context->FloatSave directly as it is using the */
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/* correct structure (the same as fsave/frstor) */
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if (ptrace( PTRACE_GETFPREGS, pid, (caddr_t) &context->FloatSave, 0 ) == -1) goto error;
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context->FloatSave.Cr0NpxState = 0; /* FIXME */
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context->ContextFlags |= CONTEXT_FLOATING_POINT;
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}
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return;
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error:
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file_set_error();
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}
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/* set a thread context */
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static void set_thread_context_ptrace( struct thread *thread, unsigned int flags, const CONTEXT *context )
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{
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int pid = get_ptrace_pid(thread);
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if (flags & CONTEXT_FULL)
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{
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struct reg regs;
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if (((flags | CONTEXT_i386) & CONTEXT_FULL) != CONTEXT_FULL)
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{
|
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/* need to preserve some registers */
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if (ptrace( PTRACE_GETREGS, pid, (caddr_t) ®s, 0 ) == -1) goto error;
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}
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if (flags & CONTEXT_INTEGER)
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{
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regs.r_eax = context->Eax;
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regs.r_ebx = context->Ebx;
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regs.r_ecx = context->Ecx;
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regs.r_edx = context->Edx;
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regs.r_esi = context->Esi;
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regs.r_edi = context->Edi;
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}
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if (flags & CONTEXT_CONTROL)
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{
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regs.r_ebp = context->Ebp;
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regs.r_esp = context->Esp;
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regs.r_eip = context->Eip;
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regs.r_cs = context->SegCs;
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regs.r_ss = context->SegSs;
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regs.r_eflags = context->EFlags;
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}
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if (flags & CONTEXT_SEGMENTS)
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{
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regs.r_ds = context->SegDs;
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regs.r_es = context->SegEs;
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regs.r_fs = context->SegFs;
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regs.r_gs = context->SegGs;
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}
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if (ptrace( PTRACE_SETREGS, pid, (caddr_t) ®s, 0 ) == -1) goto error;
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}
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if (flags & CONTEXT_DEBUG_REGISTERS)
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{
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#ifdef PTRACE_SETDBREGS
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struct dbreg dbregs;
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struct dbreg dbregs;
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if (ptrace( PTRACE_GETDBREGS, pid, (caddr_t) &dbregs, 0 ) == -1)
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goto error;
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#ifdef DBREG_DRX
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/* needed for FreeBSD, the structure fields have changed under 5.x */
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DBREG_DRX((&dbregs), 0) = context->Dr0;
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DBREG_DRX((&dbregs), 1) = context->Dr1;
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DBREG_DRX((&dbregs), 2) = context->Dr2;
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DBREG_DRX((&dbregs), 3) = context->Dr3;
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||||
DBREG_DRX((&dbregs), 4) = 0;
|
||||
DBREG_DRX((&dbregs), 5) = 0;
|
||||
DBREG_DRX((&dbregs), 6) = context->Dr6;
|
||||
DBREG_DRX((&dbregs), 7) = context->Dr7;
|
||||
/* needed for FreeBSD, the structure fields have changed under 5.x */
|
||||
context->Dr0 = DBREG_DRX((&dbregs), 0);
|
||||
context->Dr1 = DBREG_DRX((&dbregs), 1);
|
||||
context->Dr2 = DBREG_DRX((&dbregs), 2);
|
||||
context->Dr3 = DBREG_DRX((&dbregs), 3);
|
||||
context->Dr6 = DBREG_DRX((&dbregs), 6);
|
||||
context->Dr7 = DBREG_DRX((&dbregs), 7);
|
||||
#else
|
||||
dbregs.dr0 = context->Dr0;
|
||||
dbregs.dr1 = context->Dr1;
|
||||
dbregs.dr2 = context->Dr2;
|
||||
dbregs.dr3 = context->Dr3;
|
||||
dbregs.dr4 = 0;
|
||||
dbregs.dr5 = 0;
|
||||
dbregs.dr6 = context->Dr6;
|
||||
dbregs.dr7 = context->Dr7;
|
||||
context->Dr0 = dbregs.dr0;
|
||||
context->Dr1 = dbregs.dr1;
|
||||
context->Dr2 = dbregs.dr2;
|
||||
context->Dr3 = dbregs.dr3;
|
||||
context->Dr6 = dbregs.dr6;
|
||||
context->Dr7 = dbregs.dr7;
|
||||
#endif
|
||||
if (ptrace( PTRACE_SETDBREGS, pid, (caddr_t) &dbregs, 0 ) == -1)
|
||||
goto error;
|
||||
#endif
|
||||
}
|
||||
if (flags & CONTEXT_FLOATING_POINT)
|
||||
{
|
||||
/* we can use context->FloatSave directly as it is using the */
|
||||
/* correct structure (the same as fsave/frstor) */
|
||||
if (ptrace( PTRACE_SETFPREGS, pid, (caddr_t) &context->FloatSave, 0 ) == -1) goto error;
|
||||
}
|
||||
return;
|
||||
return 1;
|
||||
error:
|
||||
file_set_error();
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
#else /* linux || __sun__ || __FreeBSD__ */
|
||||
#error You must implement get/set_thread_context_ptrace for your platform
|
||||
#endif /* linux || __sun__ || __FreeBSD__ */
|
||||
/* set the thread x86 debug registers */
|
||||
static int set_thread_debug_regs( struct thread *thread, const CONTEXT *context )
|
||||
{
|
||||
#ifdef PTRACE_SETDBREGS
|
||||
int pid = get_ptrace_pid(thread);
|
||||
struct dbreg dbregs;
|
||||
#ifdef DBREG_DRX
|
||||
/* needed for FreeBSD, the structure fields have changed under 5.x */
|
||||
DBREG_DRX((&dbregs), 0) = context->Dr0;
|
||||
DBREG_DRX((&dbregs), 1) = context->Dr1;
|
||||
DBREG_DRX((&dbregs), 2) = context->Dr2;
|
||||
DBREG_DRX((&dbregs), 3) = context->Dr3;
|
||||
DBREG_DRX((&dbregs), 4) = 0;
|
||||
DBREG_DRX((&dbregs), 5) = 0;
|
||||
DBREG_DRX((&dbregs), 6) = context->Dr6;
|
||||
DBREG_DRX((&dbregs), 7) = context->Dr7;
|
||||
#else
|
||||
dbregs.dr0 = context->Dr0;
|
||||
dbregs.dr1 = context->Dr1;
|
||||
dbregs.dr2 = context->Dr2;
|
||||
dbregs.dr3 = context->Dr3;
|
||||
dbregs.dr4 = 0;
|
||||
dbregs.dr5 = 0;
|
||||
dbregs.dr6 = context->Dr6;
|
||||
dbregs.dr7 = context->Dr7;
|
||||
#endif
|
||||
if (ptrace( PTRACE_SETDBREGS, pid, (caddr_t) &dbregs, 0 ) != -1) return 1;
|
||||
file_set_error();
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
#else /* linux || __FreeBSD__ */
|
||||
|
||||
/* retrieve the thread x86 debug registers */
|
||||
static int get_thread_debug_regs( struct thread *thread, CONTEXT *context )
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* set the thread x86 debug registers */
|
||||
static int set_thread_debug_regs( struct thread *thread, const CONTEXT *context )
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif /* linux || __FreeBSD__ */
|
||||
|
||||
|
||||
/* copy a context structure according to the flags */
|
||||
|
|
@ -532,9 +239,16 @@ static void copy_context( CONTEXT *to, const CONTEXT *from, unsigned int flags )
|
|||
{
|
||||
to->FloatSave = from->FloatSave;
|
||||
}
|
||||
/* we don't bother copying the debug registers, since they */
|
||||
/* always need to be accessed by ptrace anyway */
|
||||
to->ContextFlags |= flags & ~CONTEXT_DEBUG_REGISTERS;
|
||||
if (flags & CONTEXT_DEBUG_REGISTERS)
|
||||
{
|
||||
to->Dr0 = from->Dr0;
|
||||
to->Dr1 = from->Dr1;
|
||||
to->Dr2 = from->Dr2;
|
||||
to->Dr3 = from->Dr3;
|
||||
to->Dr6 = from->Dr6;
|
||||
to->Dr7 = from->Dr7;
|
||||
}
|
||||
to->ContextFlags |= flags;
|
||||
}
|
||||
|
||||
/* retrieve the current instruction pointer of a context */
|
||||
|
|
@ -550,13 +264,11 @@ void get_thread_context( struct thread *thread, CONTEXT *context, unsigned int f
|
|||
flags &= ~CONTEXT_i386; /* get rid of CPU id */
|
||||
|
||||
if (thread->context) /* thread is inside an exception event or suspended */
|
||||
copy_context( context, thread->context, flags );
|
||||
copy_context( context, thread->context, flags & ~CONTEXT_DEBUG_REGISTERS );
|
||||
|
||||
flags &= CONTEXT_DEBUG_REGISTERS;
|
||||
|
||||
if (flags && suspend_for_ptrace( thread ))
|
||||
if ((flags & CONTEXT_DEBUG_REGISTERS) && suspend_for_ptrace( thread ))
|
||||
{
|
||||
get_thread_context_ptrace( thread, flags, context );
|
||||
if (get_thread_debug_regs( thread, context )) context->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
|
||||
resume_after_ptrace( thread );
|
||||
}
|
||||
}
|
||||
|
|
@ -566,16 +278,13 @@ void set_thread_context( struct thread *thread, const CONTEXT *context, unsigned
|
|||
{
|
||||
flags &= ~CONTEXT_i386; /* get rid of CPU id */
|
||||
|
||||
if (thread->context) /* thread is inside an exception event or suspended */
|
||||
copy_context( thread->context, context, flags );
|
||||
|
||||
flags &= CONTEXT_DEBUG_REGISTERS; /* the other registers are handled on the client side */
|
||||
|
||||
if (flags && suspend_for_ptrace( thread ))
|
||||
if ((flags & CONTEXT_DEBUG_REGISTERS) && suspend_for_ptrace( thread ))
|
||||
{
|
||||
set_thread_context_ptrace( thread, flags, context );
|
||||
if (!set_thread_debug_regs( thread, context )) flags &= ~CONTEXT_DEBUG_REGISTERS;
|
||||
resume_after_ptrace( thread );
|
||||
}
|
||||
|
||||
if (thread->context) copy_context( thread->context, context, flags );
|
||||
}
|
||||
|
||||
#endif /* __i386__ */
|
||||
|
|
|
|||
Loading…
Reference in New Issue