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ntdll: Use a stack_layout structure to build exception data on i386. 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2019-09-12 19:20:14 +02:00
parent 6e6711d773
commit 04c73a8930
1 changed files with 63 additions and 75 deletions
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138
dlls/ntdll/signal_i386.c
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@ -419,6 +419,18 @@ typedef struct trapframe ucontext_t;
#error You must define the signal context functions for your platform #error You must define the signal context functions for your platform
#endif /* linux */ #endif /* linux */
/* stack layout when calling an exception raise function */
struct stack_layout
{
void *ret_addr; /* return address from raise_func */
EXCEPTION_RECORD *rec_ptr; /* first arg for raise_func */
CONTEXT *context_ptr; /* second arg for raise_func */
CONTEXT context;
EXCEPTION_RECORD rec;
DWORD ebp;
DWORD eip;
};
typedef int (*wine_signal_handler)(unsigned int sig); typedef int (*wine_signal_handler)(unsigned int sig);
static const size_t teb_size = 4096; /* we reserve one page for the TEB */ static const size_t teb_size = 4096; /* we reserve one page for the TEB */
@ -1773,19 +1785,10 @@ static BOOL check_atl_thunk( EXCEPTION_RECORD *rec, CONTEXT *context )
* *
* Setup the exception record and context on the thread stack. * Setup the exception record and context on the thread stack.
*/ */
static EXCEPTION_RECORD *setup_exception_record( ucontext_t *sigcontext, void *stack_ptr, static struct stack_layout *setup_exception_record( ucontext_t *sigcontext, void *stack_ptr,
WORD fs, WORD gs, raise_func func ) WORD fs, WORD gs, raise_func func )
{ {
struct stack_layout struct stack_layout *stack = stack_ptr;
{
void *ret_addr; /* return address from raise_func */
EXCEPTION_RECORD *rec_ptr; /* first arg for raise_func */
CONTEXT *context_ptr; /* second arg for raise_func */
CONTEXT context;
EXCEPTION_RECORD rec;
DWORD ebp;
DWORD eip;
} *stack = stack_ptr;
DWORD exception_code = 0; DWORD exception_code = 0;
/* stack sanity checks */ /* stack sanity checks */
@ -1869,7 +1872,7 @@ static EXCEPTION_RECORD *setup_exception_record( ucontext_t *sigcontext, void *s
GS_sig(sigcontext) = wine_get_gs(); GS_sig(sigcontext) = wine_get_gs();
SS_sig(sigcontext) = wine_get_ss(); SS_sig(sigcontext) = wine_get_ss();
return stack->rec_ptr; return stack;
} }
@ -1880,7 +1883,7 @@ static EXCEPTION_RECORD *setup_exception_record( ucontext_t *sigcontext, void *s
* sigcontext so that the return from the signal handler will call * sigcontext so that the return from the signal handler will call
* the raise function. * the raise function.
*/ */
static EXCEPTION_RECORD *setup_exception( ucontext_t *sigcontext, raise_func func ) static struct stack_layout *setup_exception( ucontext_t *sigcontext, raise_func func )
{ {
WORD fs, gs; WORD fs, gs;
void *stack = init_handler( sigcontext, &fs, &gs ); void *stack = init_handler( sigcontext, &fs, &gs );
@ -1889,17 +1892,6 @@ static EXCEPTION_RECORD *setup_exception( ucontext_t *sigcontext, raise_func fun
} }
/***********************************************************************
* get_exception_context
*
* Get a pointer to the context built by setup_exception.
*/
static inline CONTEXT *get_exception_context( EXCEPTION_RECORD *rec )
{
return (CONTEXT *)rec - 1; /* cf. stack_layout structure */
}
/********************************************************************** /**********************************************************************
* get_fpu_code * get_fpu_code
* *
@ -2042,14 +2034,14 @@ static void WINAPI raise_generic_exception( EXCEPTION_RECORD *rec, CONTEXT *cont
static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext ) static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{ {
WORD fs, gs; WORD fs, gs;
EXCEPTION_RECORD *rec; struct stack_layout *stack;
ucontext_t *context = sigcontext; ucontext_t *context = sigcontext;
void *stack = init_handler( sigcontext, &fs, &gs ); void *stack_ptr = init_handler( sigcontext, &fs, &gs );
/* check for exceptions on the signal stack caused by write watches */ /* check for exceptions on the signal stack caused by write watches */
if (get_trap_code(context) == TRAP_x86_PAGEFLT && if (get_trap_code(context) == TRAP_x86_PAGEFLT &&
(char *)stack >= (char *)get_signal_stack() && (char *)stack_ptr >= (char *)get_signal_stack() &&
(char *)stack < (char *)get_signal_stack() + signal_stack_size && (char *)stack_ptr < (char *)get_signal_stack() + signal_stack_size &&
!virtual_handle_fault( siginfo->si_addr, (get_error_code(context) >> 1) & 0x09, TRUE )) !virtual_handle_fault( siginfo->si_addr, (get_error_code(context) >> 1) & 0x09, TRUE ))
{ {
return; return;
@ -2063,55 +2055,54 @@ static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
case 1: /* handled */ case 1: /* handled */
return; return;
case -1: /* overflow */ case -1: /* overflow */
rec = setup_exception_record( context, stack, fs, gs, raise_segv_exception ); stack = setup_exception_record( context, stack_ptr, fs, gs, raise_segv_exception );
rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW; stack->rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
return; return;
} }
} }
rec = setup_exception_record( context, stack, fs, gs, raise_segv_exception ); stack = setup_exception_record( context, stack_ptr, fs, gs, raise_segv_exception );
if (rec->ExceptionCode == EXCEPTION_STACK_OVERFLOW) return; if (stack->rec.ExceptionCode == EXCEPTION_STACK_OVERFLOW) return;
switch(get_trap_code(context)) switch(get_trap_code(context))
{ {
case TRAP_x86_OFLOW: /* Overflow exception */ case TRAP_x86_OFLOW: /* Overflow exception */
rec->ExceptionCode = EXCEPTION_INT_OVERFLOW; stack->rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
break; break;
case TRAP_x86_BOUND: /* Bound range exception */ case TRAP_x86_BOUND: /* Bound range exception */
rec->ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED; stack->rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
break; break;
case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */ case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */
rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION; stack->rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break; break;
case TRAP_x86_STKFLT: /* Stack fault */ case TRAP_x86_STKFLT: /* Stack fault */
rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW; stack->rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
break; break;
case TRAP_x86_SEGNPFLT: /* Segment not present exception */ case TRAP_x86_SEGNPFLT: /* Segment not present exception */
case TRAP_x86_PROTFLT: /* General protection fault */ case TRAP_x86_PROTFLT: /* General protection fault */
case TRAP_x86_UNKNOWN: /* Unknown fault code */ case TRAP_x86_UNKNOWN: /* Unknown fault code */
{ {
CONTEXT *win_context = get_exception_context( rec );
WORD err = get_error_code(context); WORD err = get_error_code(context);
if (!err && (rec->ExceptionCode = is_privileged_instr( win_context ))) break; if (!err && (stack->rec.ExceptionCode = is_privileged_instr( &stack->context ))) break;
if ((err & 7) == 2 && handle_interrupt( err >> 3, rec, win_context )) break; if ((err & 7) == 2 && handle_interrupt( err >> 3, &stack->rec, &stack->context )) break;
rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION; stack->rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
rec->NumberParameters = 2; stack->rec.NumberParameters = 2;
rec->ExceptionInformation[0] = 0; stack->rec.ExceptionInformation[0] = 0;
/* if error contains a LDT selector, use that as fault address */ /* if error contains a LDT selector, use that as fault address */
if ((err & 7) == 4 && !wine_ldt_is_system( err | 7 )) if ((err & 7) == 4 && !wine_ldt_is_system( err | 7 ))
rec->ExceptionInformation[1] = err & ~7; stack->rec.ExceptionInformation[1] = err & ~7;
else else
rec->ExceptionInformation[1] = 0xffffffff; stack->rec.ExceptionInformation[1] = 0xffffffff;
} }
break; break;
case TRAP_x86_PAGEFLT: /* Page fault */ case TRAP_x86_PAGEFLT: /* Page fault */
rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION; stack->rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
rec->NumberParameters = 2; stack->rec.NumberParameters = 2;
rec->ExceptionInformation[0] = (get_error_code(context) >> 1) & 0x09; stack->rec.ExceptionInformation[0] = (get_error_code(context) >> 1) & 0x09;
rec->ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr; stack->rec.ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr;
break; break;
case TRAP_x86_ALIGNFLT: /* Alignment check exception */ case TRAP_x86_ALIGNFLT: /* Alignment check exception */
rec->ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT; stack->rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
break; break;
default: default:
WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context) ); WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context) );
@ -2122,7 +2113,7 @@ static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
case TRAP_x86_TSSFLT: /* Invalid TSS exception */ case TRAP_x86_TSSFLT: /* Invalid TSS exception */
case TRAP_x86_MCHK: /* Machine check exception */ case TRAP_x86_MCHK: /* Machine check exception */
case TRAP_x86_CACHEFLT: /* Cache flush exception */ case TRAP_x86_CACHEFLT: /* Cache flush exception */
rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION; stack->rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break; break;
} }
} }
@ -2136,22 +2127,22 @@ static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext ) static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{ {
ucontext_t *context = sigcontext; ucontext_t *context = sigcontext;
EXCEPTION_RECORD *rec = setup_exception( context, raise_trap_exception ); struct stack_layout *stack = setup_exception( context, raise_trap_exception );
switch(get_trap_code(context)) switch(get_trap_code(context))
{ {
case TRAP_x86_TRCTRAP: /* Single-step exception */ case TRAP_x86_TRCTRAP: /* Single-step exception */
rec->ExceptionCode = EXCEPTION_SINGLE_STEP; stack->rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
break; break;
case TRAP_x86_BPTFLT: /* Breakpoint exception */ case TRAP_x86_BPTFLT: /* Breakpoint exception */
rec->ExceptionAddress = (char *)rec->ExceptionAddress - 1; /* back up over the int3 instruction */ stack->rec.ExceptionAddress = (char *)stack->rec.ExceptionAddress - 1; /* back up over the int3 instruction */
/* fall through */ /* fall through */
default: default:
rec->ExceptionCode = EXCEPTION_BREAKPOINT; stack->rec.ExceptionCode = EXCEPTION_BREAKPOINT;
rec->NumberParameters = is_wow64 ? 1 : 3; stack->rec.NumberParameters = is_wow64 ? 1 : 3;
rec->ExceptionInformation[0] = 0; stack->rec.ExceptionInformation[0] = 0;
rec->ExceptionInformation[1] = 0; /* FIXME */ stack->rec.ExceptionInformation[1] = 0; /* FIXME */
rec->ExceptionInformation[2] = 0; /* FIXME */ stack->rec.ExceptionInformation[2] = 0; /* FIXME */
break; break;
} }
} }
@ -2164,24 +2155,21 @@ static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext )
*/ */
static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext ) static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{ {
CONTEXT *win_context;
ucontext_t *context = sigcontext; ucontext_t *context = sigcontext;
EXCEPTION_RECORD *rec = setup_exception( context, raise_generic_exception ); struct stack_layout *stack = setup_exception( context, raise_generic_exception );
win_context = get_exception_context( rec );
switch(get_trap_code(context)) switch(get_trap_code(context))
{ {
case TRAP_x86_DIVIDE: /* Division by zero exception */ case TRAP_x86_DIVIDE: /* Division by zero exception */
rec->ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO; stack->rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
break; break;
case TRAP_x86_FPOPFLT: /* Coprocessor segment overrun */ case TRAP_x86_FPOPFLT: /* Coprocessor segment overrun */
rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION; stack->rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
break; break;
case TRAP_x86_ARITHTRAP: /* Floating point exception */ case TRAP_x86_ARITHTRAP: /* Floating point exception */
case TRAP_x86_UNKNOWN: /* Unknown fault code */ case TRAP_x86_UNKNOWN: /* Unknown fault code */
rec->ExceptionCode = get_fpu_code( win_context ); stack->rec.ExceptionCode = get_fpu_code( &stack->context );
rec->ExceptionAddress = (LPVOID)win_context->FloatSave.ErrorOffset; stack->rec.ExceptionAddress = (LPVOID)stack->context.FloatSave.ErrorOffset;
break; break;
case TRAP_x86_CACHEFLT: /* SIMD exception */ case TRAP_x86_CACHEFLT: /* SIMD exception */
/* TODO: /* TODO:
@ -2191,14 +2179,14 @@ static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
FIXME("untested SIMD exception: %#x. Might not work correctly\n", FIXME("untested SIMD exception: %#x. Might not work correctly\n",
siginfo->si_code); siginfo->si_code);
rec->ExceptionCode = STATUS_FLOAT_MULTIPLE_TRAPS; stack->rec.ExceptionCode = STATUS_FLOAT_MULTIPLE_TRAPS;
rec->NumberParameters = 1; stack->rec.NumberParameters = 1;
/* no idea what meaning is actually behind this but that's what native does */ /* no idea what meaning is actually behind this but that's what native does */
rec->ExceptionInformation[0] = 0; stack->rec.ExceptionInformation[0] = 0;
break; break;
default: default:
WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context) ); WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context) );
rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION; stack->rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
break; break;
} }
} }
@ -2217,8 +2205,8 @@ static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
init_handler( sigcontext, &fs, &gs ); init_handler( sigcontext, &fs, &gs );
if (!dispatch_signal(SIGINT)) if (!dispatch_signal(SIGINT))
{ {
EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception ); struct stack_layout *stack = setup_exception( sigcontext, raise_generic_exception );
rec->ExceptionCode = CONTROL_C_EXIT; stack->rec.ExceptionCode = CONTROL_C_EXIT;
} }
} }
@ -2229,9 +2217,9 @@ static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
*/ */
static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext ) static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{ {
EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception ); struct stack_layout *stack = setup_exception( sigcontext, raise_generic_exception );
rec->ExceptionCode = EXCEPTION_WINE_ASSERTION; stack->rec.ExceptionCode = EXCEPTION_WINE_ASSERTION;
rec->ExceptionFlags = EH_NONCONTINUABLE; stack->rec.ExceptionFlags = EH_NONCONTINUABLE;
} }