system/wine
system/wine
1
0
Fork 0
mirror of git://source.winehq.org/git/wine.git synced 2024-10-06 16:14:40 +00:00
Code Issues Packages Projects Releases Wiki Activity
wine/dlls/ntdll/unix/signal_arm.c
Alexandre Julliard a6bb3662dc ntdll: Implement a faster Unix call dispatcher on ARM.
2022-12-01 20:36:04 +01:00

1804 lines
59 KiB
C
Raw Blame History

/*
* ARM signal handling routines
*
* Copyright 2002 Marcus Meissner, SuSE Linux AG
* Copyright 2010-2013, 2015 André Hentschel
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#if 0
#pragma makedep unix
#endif
#ifdef __arm__
#include "config.h"
#include <assert.h>
#include <pthread.h>
#include <signal.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
#ifdef HAVE_SYSCALL_H
# include <syscall.h>
#else
# ifdef HAVE_SYS_SYSCALL_H
# include <sys/syscall.h>
# endif
#endif
#ifdef HAVE_SYS_SIGNAL_H
# include <sys/signal.h>
#endif
#ifdef HAVE_SYS_UCONTEXT_H
# include <sys/ucontext.h>
#endif
#ifdef HAVE_LIBUNWIND
# define UNW_LOCAL_ONLY
# include <libunwind.h>
#endif
#ifdef HAVE_LINK_H
# include <link.h>
#endif
#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winnt.h"
#include "winternl.h"
#include "wine/asm.h"
#include "unix_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(seh);
/***********************************************************************
* signal context platform-specific definitions
*/
#ifdef linux
#if defined(__ANDROID__) && !defined(HAVE_SYS_UCONTEXT_H)
typedef struct ucontext
{
unsigned long uc_flags;
struct ucontext *uc_link;
stack_t uc_stack;
struct sigcontext uc_mcontext;
sigset_t uc_sigmask;
unsigned long uc_regspace[128] __attribute__((__aligned__(8)));
} ucontext_t;
#endif
/* All Registers access - only for local access */
# define REG_sig(reg_name, context) ((context)->uc_mcontext.reg_name)
# define REGn_sig(reg_num, context) ((context)->uc_mcontext.arm_r##reg_num)
/* Special Registers access */
# define SP_sig(context) REG_sig(arm_sp, context) /* Stack pointer */
# define LR_sig(context) REG_sig(arm_lr, context) /* Link register */
# define PC_sig(context) REG_sig(arm_pc, context) /* Program counter */
# define CPSR_sig(context) REG_sig(arm_cpsr, context) /* Current State Register */
# define IP_sig(context) REG_sig(arm_ip, context) /* Intra-Procedure-call scratch register */
# define FP_sig(context) REG_sig(arm_fp, context) /* Frame pointer */
/* Exceptions */
# define ERROR_sig(context) REG_sig(error_code, context)
# define TRAP_sig(context) REG_sig(trap_no, context)
struct extended_ctx
{
unsigned long magic;
unsigned long size;
};
struct vfp_sigframe
{
struct extended_ctx ctx;
unsigned long long fpregs[32];
unsigned long fpscr;
};
static void *get_extended_sigcontext( const ucontext_t *sigcontext, unsigned int magic )
{
struct extended_ctx *ctx = (struct extended_ctx *)sigcontext->uc_regspace;
while ((char *)ctx < (char *)(sigcontext + 1) && ctx->magic && ctx->size)
{
if (ctx->magic == magic) return ctx;
ctx = (struct extended_ctx *)((char *)ctx + ctx->size);
}
return NULL;
}
static void save_fpu( CONTEXT *context, const ucontext_t *sigcontext )
{
struct vfp_sigframe *frame = get_extended_sigcontext( sigcontext, 0x56465001 );
if (!frame) return;
memcpy( context->u.D, frame->fpregs, sizeof(context->u.D) );
context->Fpscr = frame->fpscr;
}
static void restore_fpu( const CONTEXT *context, ucontext_t *sigcontext )
{
struct vfp_sigframe *frame = get_extended_sigcontext( sigcontext, 0x56465001 );
if (!frame) return;
memcpy( frame->fpregs, context->u.D, sizeof(context->u.D) );
frame->fpscr = context->Fpscr;
}
#elif defined(__FreeBSD__)
/* All Registers access - only for local access */
# define REGn_sig(reg_num, context) ((context)->uc_mcontext.__gregs[reg_num])
/* Special Registers access */
# define SP_sig(context) REGn_sig(_REG_SP, context) /* Stack pointer */
# define LR_sig(context) REGn_sig(_REG_LR, context) /* Link register */
# define PC_sig(context) REGn_sig(_REG_PC, context) /* Program counter */
# define CPSR_sig(context) REGn_sig(_REG_CPSR, context) /* Current State Register */
# define IP_sig(context) REGn_sig(_REG_R12, context) /* Intra-Procedure-call scratch register */
# define FP_sig(context) REGn_sig(_REG_FP, context) /* Frame pointer */
static void save_fpu( CONTEXT *context, const ucontext_t *sigcontext ) { }
static void restore_fpu( const CONTEXT *context, ucontext_t *sigcontext ) { }
#endif /* linux */
enum arm_trap_code
{
TRAP_ARM_UNKNOWN = -1, /* Unknown fault (TRAP_sig not defined) */
TRAP_ARM_PRIVINFLT = 6, /* Invalid opcode exception */
TRAP_ARM_PAGEFLT = 14, /* Page fault */
TRAP_ARM_ALIGNFLT = 17, /* Alignment check exception */
};
struct syscall_frame
{
UINT r0; /* 000 */
UINT r1; /* 004 */
UINT r2; /* 008 */
UINT r3; /* 00c */
UINT r4; /* 010 */
UINT r5; /* 014 */
UINT r6; /* 018 */
UINT r7; /* 01c */
UINT r8; /* 020 */
UINT r9; /* 024 */
UINT r10; /* 028 */
UINT r11; /* 02c */
UINT r12; /* 030 */
UINT pc; /* 034 */
UINT sp; /* 038 */
UINT lr; /* 03c */
UINT cpsr; /* 040 */
UINT restore_flags; /* 044 */
UINT fpscr; /* 048 */
struct syscall_frame *prev_frame; /* 04c */
SYSTEM_SERVICE_TABLE *syscall_table; /* 050 */
UINT align[3]; /* 054 */
ULONGLONG d[32]; /* 060 */
};
C_ASSERT( sizeof( struct syscall_frame ) == 0x160);
struct arm_thread_data
{
void *exit_frame; /* 1d4 exit frame pointer */
struct syscall_frame *syscall_frame; /* 1d8 frame pointer on syscall entry */
};
C_ASSERT( sizeof(struct arm_thread_data) <= sizeof(((struct ntdll_thread_data *)0)->cpu_data) );
C_ASSERT( offsetof( TEB, GdiTebBatch ) + offsetof( struct arm_thread_data, exit_frame ) == 0x1d4 );
C_ASSERT( offsetof( TEB, GdiTebBatch ) + offsetof( struct arm_thread_data, syscall_frame ) == 0x1d8 );
static inline struct arm_thread_data *arm_thread_data(void)
{
return (struct arm_thread_data *)ntdll_get_thread_data()->cpu_data;
}
static BOOL is_inside_syscall( ucontext_t *sigcontext )
{
return ((char *)SP_sig(sigcontext) >= (char *)ntdll_get_thread_data()->kernel_stack &&
(char *)SP_sig(sigcontext) <= (char *)arm_thread_data()->syscall_frame);
}
extern void raise_func_trampoline( EXCEPTION_RECORD *rec, CONTEXT *context, void *dispatcher );
struct exidx_entry
{
uint32_t addr;
uint32_t data;
};
static uint32_t prel31_to_abs(const uint32_t *ptr)
{
uint32_t prel31 = *ptr;
uint32_t rel = prel31 | ((prel31 << 1) & 0x80000000);
return (uintptr_t)ptr + rel;
}
static uint8_t get_byte(const uint32_t *ptr, int offset, int bytes)
{
int word = offset >> 2;
int byte = offset & 0x3;
if (offset >= bytes)
return 0xb0; /* finish opcode */
return (ptr[word] >> (24 - 8*byte)) & 0xff;
}
static uint32_t get_uleb128(const uint32_t *ptr, int *offset, int bytes)
{
int shift = 0;
uint32_t val = 0;
while (1)
{
uint8_t byte = get_byte(ptr, (*offset)++, bytes);
val |= (byte & 0x7f) << shift;
if ((byte & 0x80) == 0)
break;
shift += 7;
}
return val;
}
static void pop_regs(CONTEXT *context, uint32_t regs)
{
int i;
DWORD new_sp = 0;
for (i = 0; i < 16; i++)
{
if (regs & (1U << i))
{
DWORD val = *(DWORD *)context->Sp;
if (i != 13)
(&context->R0)[i] = val;
else
new_sp = val;
context->Sp += 4;
}
}
if (regs & (1 << 13))
context->Sp = new_sp;
}
static void pop_vfp(CONTEXT *context, int first, int last)
{
int i;
for (i = first; i <= last; i++)
{
context->u.D[i] = *(ULONGLONG *)context->Sp;
context->Sp += 8;
}
}
static uint32_t regmask(int first_bit, int n_bits)
{
return ((1U << (n_bits + 1)) - 1) << first_bit;
}
/***********************************************************************
* ehabi_virtual_unwind
*/
static NTSTATUS ehabi_virtual_unwind( UINT ip, DWORD *frame, CONTEXT *context,
const struct exidx_entry *entry,
PEXCEPTION_ROUTINE *handler, void **handler_data )
{
const uint32_t *ptr;
const void *lsda = NULL;
int compact_inline = 0;
int offset = 0;
int bytes = 0;
int personality;
int extra_words;
int finish = 0;
int set_pc = 0;
UINT func_begin = prel31_to_abs(&entry->addr);
*frame = context->Sp;
TRACE( "ip %#x function %#x\n", ip, func_begin );
if (entry->data == 1)
{
ERR("EXIDX_CANTUNWIND\n");
return STATUS_UNSUCCESSFUL;
}
else if (entry->data & 0x80000000)
{
if ((entry->data & 0x7f000000) != 0)
{
ERR("compact inline EXIDX must have personality 0\n");
return STATUS_UNSUCCESSFUL;
}
ptr = &entry->data;
compact_inline = 1;
}
else
{
ptr = (uint32_t *)prel31_to_abs(&entry->data);
}
if ((*ptr & 0x80000000) == 0)
{
/* Generic */
void *personality_func = (void *)prel31_to_abs(ptr);
int words = (ptr[1] >> 24) & 0xff;
lsda = ptr + 1 + words + 1;
ERR("generic EHABI unwinding not supported\n");
(void)personality_func;
return STATUS_UNSUCCESSFUL;
}
/* Compact */
personality = (*ptr >> 24) & 0x0f;
switch (personality)
{
case 0:
if (!compact_inline)
lsda = ptr + 1;
extra_words = 0;
offset = 1;
break;
case 1:
extra_words = (*ptr >> 16) & 0xff;
lsda = ptr + extra_words + 1;
offset = 2;
break;
case 2:
extra_words = (*ptr >> 16) & 0xff;
lsda = ptr + extra_words + 1;
offset = 2;
break;
default:
ERR("unsupported compact EXIDX personality %d\n", personality);
return STATUS_UNSUCCESSFUL;
}
/* Not inspecting the descriptors */
(void)lsda;
bytes = 4 + 4*extra_words;
while (offset < bytes && !finish)
{
uint8_t byte = get_byte(ptr, offset++, bytes);
if ((byte & 0xc0) == 0x00)
{
/* Increment Sp */
context->Sp += (byte & 0x3f) * 4 + 4;
}
else if ((byte & 0xc0) == 0x40)
{
/* Decrement Sp */
context->Sp -= (byte & 0x3f) * 4 + 4;
}
else if ((byte & 0xf0) == 0x80)
{
/* Pop {r4-r15} based on register mask */
int regs = ((byte & 0x0f) << 8) | get_byte(ptr, offset++, bytes);
if (!regs)
{
ERR("refuse to unwind\n");
return STATUS_UNSUCCESSFUL;
}
regs <<= 4;
pop_regs(context, regs);
if (regs & (1 << 15))
set_pc = 1;
}
else if ((byte & 0xf0) == 0x90)
{
/* Restore Sp from other register */
int reg = byte & 0x0f;
if (reg == 13 || reg == 15)
{
ERR("reserved opcode\n");
return STATUS_UNSUCCESSFUL;
}
context->Sp = (&context->R0)[reg];
}
else if ((byte & 0xf0) == 0xa0)
{
/* Pop r4-r(4+n) (+lr) */
int n = byte & 0x07;
int regs = regmask(4, n);
if (byte & 0x08)
regs |= 1 << 14;
pop_regs(context, regs);
}
else if (byte == 0xb0)
{
finish = 1;
}
else if (byte == 0xb1)
{
/* Pop {r0-r3} based on register mask */
int regs = get_byte(ptr, offset++, bytes);
if (regs == 0 || (regs & 0xf0) != 0)
{
ERR("spare opcode\n");
return STATUS_UNSUCCESSFUL;
}
pop_regs(context, regs);
}
else if (byte == 0xb2)
{
/* Increment Sp by a larger amount */
int imm = get_uleb128(ptr, &offset, bytes);
context->Sp += 0x204 + imm * 4;
}
else if (byte == 0xb3)
{
/* Pop VFP registers as if saved by FSTMFDX; this opcode
* is deprecated. */
ERR("FSTMFDX unsupported\n");
return STATUS_UNSUCCESSFUL;
}
else if ((byte & 0xfc) == 0xb4)
{
ERR("spare opcode\n");
return STATUS_UNSUCCESSFUL;
}
else if ((byte & 0xf8) == 0xb8)
{
/* Pop VFP registers as if saved by FSTMFDX; this opcode
* is deprecated. */
ERR("FSTMFDX unsupported\n");
return STATUS_UNSUCCESSFUL;
}
else if ((byte & 0xf8) == 0xc0)
{
ERR("spare opcode / iWMMX\n");
return STATUS_UNSUCCESSFUL;
}
else if ((byte & 0xfe) == 0xc8)
{
/* Pop VFP registers d(16+ssss)-d(16+ssss+cccc), or
* d(0+ssss)-d(0+ssss+cccc) as if saved by VPUSH */
int first, last;
if ((byte & 0x01) == 0)
first = 16;
else
first = 0;
byte = get_byte(ptr, offset++, bytes);
first += (byte & 0xf0) >> 4;
last = first + (byte & 0x0f);
if (last >= 32)
{
ERR("reserved opcode\n");
return STATUS_UNSUCCESSFUL;
}
pop_vfp(context, first, last);
}
else if ((byte & 0xf8) == 0xc8)
{
ERR("spare opcode\n");
return STATUS_UNSUCCESSFUL;
}
else if ((byte & 0xf8) == 0xd0)
{
/* Pop VFP registers d8-d(8+n) as if saved by VPUSH */
int n = byte & 0x07;
pop_vfp(context, 8, 8 + n);
}
else
{
ERR("spare opcode\n");
return STATUS_UNSUCCESSFUL;
}
}
if (offset > bytes)
{
ERR("truncated opcodes\n");
return STATUS_UNSUCCESSFUL;
}
*handler = NULL; /* personality */
*handler_data = NULL; /* lsda */
context->ContextFlags |= CONTEXT_UNWOUND_TO_CALL;
if (!set_pc)
context->Pc = context->Lr;
/* There's no need to check for raise_func_trampoline and manually restore
* Lr separately from Pc like with libunwind; the EHABI unwind info
* describes how both of them are restored separately, and as long as
* the unwind info restored Pc, it doesn't have to be set from Lr. */
TRACE( "next function pc=%08lx\n", context->Pc );
TRACE(" r0=%08lx r1=%08lx r2=%08lx r3=%08lx\n",
context->R0, context->R1, context->R2, context->R3 );
TRACE(" r4=%08lx r5=%08lx r6=%08lx r7=%08lx\n",
context->R4, context->R5, context->R6, context->R7 );
TRACE(" r8=%08lx r9=%08lx r10=%08lx r11=%08lx\n",
context->R8, context->R9, context->R10, context->R11 );
TRACE(" r12=%08lx sp=%08lx lr=%08lx pc=%08lx\n",
context->R12, context->Sp, context->Lr, context->Pc );
return STATUS_SUCCESS;
}
#ifdef linux
struct iterate_data
{
ULONG_PTR ip;
int failed;
struct exidx_entry *entry;
};
static int contains_addr(struct dl_phdr_info *info, const ElfW(Phdr) *phdr, struct iterate_data *data)
{
if (phdr->p_type != PT_LOAD)
return 0;
return data->ip >= info->dlpi_addr + phdr->p_vaddr && data->ip < info->dlpi_addr + phdr->p_vaddr + phdr->p_memsz;
}
static int check_exidx(struct dl_phdr_info *info, size_t info_size, void *arg)
{
struct iterate_data *data = arg;
int i;
int found_addr;
const ElfW(Phdr) *exidx = NULL;
struct exidx_entry *begin, *end;
if (info->dlpi_phnum == 0 || data->ip < info->dlpi_addr || data->failed)
return 0;
found_addr = 0;
for (i = 0; i < info->dlpi_phnum; i++)
{
const ElfW(Phdr) *phdr = &info->dlpi_phdr[i];
if (contains_addr(info, phdr, data))
found_addr = 1;
if (phdr->p_type == PT_ARM_EXIDX)
exidx = phdr;
}
if (!found_addr || !exidx)
{
if (found_addr)
{
TRACE("found matching address in %s, but no EXIDX\n", info->dlpi_name);
data->failed = 1;
}
return 0;
}
begin = (struct exidx_entry *)(info->dlpi_addr + exidx->p_vaddr);
end = (struct exidx_entry *)(info->dlpi_addr + exidx->p_vaddr + exidx->p_memsz);
if (data->ip < prel31_to_abs(&begin->addr))
{
TRACE("%lx before EXIDX start at %x\n", data->ip, prel31_to_abs(&begin->addr));
data->failed = 1;
return 0;
}
while (begin + 1 < end)
{
struct exidx_entry *mid = begin + (end - begin)/2;
uint32_t abs_addr = prel31_to_abs(&mid->addr);
if (abs_addr > data->ip)
{
end = mid;
}
else if (abs_addr < data->ip)
{
begin = mid;
}
else
{
begin = mid;
end = mid + 1;
}
}
data->entry = begin;
TRACE("found %lx in %s, base %x, entry %p with addr %x (rel %x) data %x\n",
data->ip, info->dlpi_name, info->dlpi_addr, begin,
prel31_to_abs(&begin->addr),
prel31_to_abs(&begin->addr) - info->dlpi_addr, begin->data);
return 1;
}
static const struct exidx_entry *find_exidx_entry( void *ip )
{
struct iterate_data data = {};
data.ip = (ULONG_PTR)ip;
data.failed = 0;
data.entry = NULL;
dl_iterate_phdr(check_exidx, &data);
return data.entry;
}
#endif
#ifdef HAVE_LIBUNWIND
static NTSTATUS libunwind_virtual_unwind( DWORD ip, DWORD *frame, CONTEXT *context,
PEXCEPTION_ROUTINE *handler, void **handler_data )
{
unw_context_t unw_context;
unw_cursor_t cursor;
unw_proc_info_t info;
int rc, i;
for (i = 0; i <= 12; i++)
unw_context.regs[i] = (&context->R0)[i];
unw_context.regs[13] = context->Sp;
unw_context.regs[14] = context->Lr;
unw_context.regs[15] = context->Pc;
rc = unw_init_local( &cursor, &unw_context );
if (rc != UNW_ESUCCESS)
{
WARN( "setup failed: %d\n", rc );
return STATUS_INVALID_DISPOSITION;
}
rc = unw_get_proc_info( &cursor, &info );
if (UNW_ENOINFO < 0) rc = -rc; /* LLVM libunwind has negative error codes */
if (rc != UNW_ESUCCESS && rc != -UNW_ENOINFO)
{
WARN( "failed to get info: %d\n", rc );
return STATUS_INVALID_DISPOSITION;
}
if (rc == -UNW_ENOINFO || ip < info.start_ip || ip > info.end_ip)
{
NTSTATUS status = context->Pc != context->Lr ?
STATUS_SUCCESS : STATUS_INVALID_DISPOSITION;
TRACE( "no info found for %x ip %x-%x, %s\n",
ip, info.start_ip, info.end_ip, status == STATUS_SUCCESS ?
"assuming leaf function" : "error, stuck" );
*handler = NULL;
*frame = context->Sp;
context->Pc = context->Lr;
context->ContextFlags |= CONTEXT_UNWOUND_TO_CALL;
return status;
}
TRACE( "ip %#x function %#lx-%#lx personality %#lx lsda %#lx fde %#lx\n",
ip, (unsigned long)info.start_ip, (unsigned long)info.end_ip, (unsigned long)info.handler,
(unsigned long)info.lsda, (unsigned long)info.unwind_info );
rc = unw_step( &cursor );
if (rc < 0)
{
WARN( "failed to unwind: %d %d\n", rc, UNW_ENOINFO );
return STATUS_INVALID_DISPOSITION;
}
*handler = (void *)info.handler;
*handler_data = (void *)info.lsda;
*frame = context->Sp;
for (i = 0; i <= 12; i++)
unw_get_reg( &cursor, UNW_ARM_R0 + i, (unw_word_t *)&(&context->R0)[i] );
unw_get_reg( &cursor, UNW_ARM_R13, (unw_word_t *)&context->Sp );
unw_get_reg( &cursor, UNW_ARM_R14, (unw_word_t *)&context->Lr );
unw_get_reg( &cursor, UNW_REG_IP, (unw_word_t *)&context->Pc );
context->ContextFlags |= CONTEXT_UNWOUND_TO_CALL;
if ((info.start_ip & ~(unw_word_t)1) ==
((unw_word_t)raise_func_trampoline & ~(unw_word_t)1)) {
/* raise_func_trampoline stores the original Lr at the bottom of the
* stack. The unwinder normally can't restore both Pc and Lr to
* individual values, thus do that manually here.
* (The function we unwind to might be a leaf function that hasn't
* backed up its own original Lr value on the stack.) */
const DWORD *orig_lr = (const DWORD *) *frame;
context->Lr = *orig_lr;
}
TRACE( "next function pc=%08lx%s\n", context->Pc, rc ? "" : " (last frame)" );
TRACE(" r0=%08lx r1=%08lx r2=%08lx r3=%08lx\n",
context->R0, context->R1, context->R2, context->R3 );
TRACE(" r4=%08lx r5=%08lx r6=%08lx r7=%08lx\n",
context->R4, context->R5, context->R6, context->R7 );
TRACE(" r8=%08lx r9=%08lx r10=%08lx r11=%08lx\n",
context->R8, context->R9, context->R10, context->R11 );
TRACE(" r12=%08lx sp=%08lx lr=%08lx pc=%08lx\n",
context->R12, context->Sp, context->Lr, context->Pc );
return STATUS_SUCCESS;
}
#endif
/***********************************************************************
* unwind_builtin_dll
*/
NTSTATUS unwind_builtin_dll( void *args )
{
struct unwind_builtin_dll_params *params = args;
DISPATCHER_CONTEXT *dispatch = params->dispatch;
CONTEXT *context = params->context;
DWORD ip = context->Pc - (dispatch->ControlPcIsUnwound ? 2 : 0);
#ifdef linux
const struct exidx_entry *entry = find_exidx_entry( (void *)ip );
if (entry)
return ehabi_virtual_unwind( ip, &dispatch->EstablisherFrame, context, entry,
&dispatch->LanguageHandler, &dispatch->HandlerData );
#endif
#ifdef HAVE_LIBUNWIND
return libunwind_virtual_unwind( ip, &dispatch->EstablisherFrame, context,
&dispatch->LanguageHandler, &dispatch->HandlerData );
#else
ERR("libunwind not available, unable to unwind\n");
return STATUS_INVALID_DISPOSITION;
#endif
}
/***********************************************************************
* get_trap_code
*
* Get the trap code for a signal.
*/
static inline enum arm_trap_code get_trap_code( int signal, const ucontext_t *sigcontext )
{
#ifdef TRAP_sig
enum arm_trap_code trap = TRAP_sig(sigcontext);
if (trap)
return trap;
#endif
switch (signal)
{
case SIGILL:
return TRAP_ARM_PRIVINFLT;
case SIGSEGV:
return TRAP_ARM_PAGEFLT;
case SIGBUS:
return TRAP_ARM_ALIGNFLT;
default:
return TRAP_ARM_UNKNOWN;
}
}
/***********************************************************************
* get_error_code
*
* Get the error code for a signal.
*/
static inline WORD get_error_code( const ucontext_t *sigcontext )
{
#ifdef ERROR_sig
return ERROR_sig(sigcontext);
#else
return 0;
#endif
}
/***********************************************************************
* get_udf_immediate
*
* Get the immediate operand if the PC is at a UDF instruction.
*/
static inline int get_udf_immediate( const ucontext_t *sigcontext )
{
if (CPSR_sig(sigcontext) & 0x20)
{
WORD thumb_insn = *(WORD *)PC_sig(sigcontext);
if ((thumb_insn >> 8) == 0xde) return thumb_insn & 0xff;
if ((thumb_insn & 0xfff0) == 0xf7f0) /* udf.w */
{
WORD ext = *(WORD *)(PC_sig(sigcontext) + 2);
if ((ext & 0xf000) == 0xa000) return ((thumb_insn & 0xf) << 12) | (ext & 0x0fff);
}
}
else
{
DWORD arm_insn = *(DWORD *)PC_sig(sigcontext);
if ((arm_insn & 0xfff000f0) == 0xe7f000f0)
{
return ((arm_insn >> 4) & 0xfff0) | (arm_insn & 0xf);
}
}
return -1;
}
/***********************************************************************
* save_context
*
* Set the register values from a sigcontext.
*/
static void save_context( CONTEXT *context, const ucontext_t *sigcontext )
{
#define C(x) context->R##x = REGn_sig(x,sigcontext)
/* Save normal registers */
C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
#undef C
context->ContextFlags = CONTEXT_FULL;
context->Sp = SP_sig(sigcontext); /* Stack pointer */
context->Lr = LR_sig(sigcontext); /* Link register */
context->Pc = PC_sig(sigcontext); /* Program Counter */
context->Cpsr = CPSR_sig(sigcontext); /* Current State Register */
context->R11 = FP_sig(sigcontext); /* Frame pointer */
context->R12 = IP_sig(sigcontext); /* Intra-Procedure-call scratch register */
if (CPSR_sig(sigcontext) & 0x20) context->Pc |= 1; /* Thumb mode */
save_fpu( context, sigcontext );
}
/***********************************************************************
* restore_context
*
* Build a sigcontext from the register values.
*/
static void restore_context( const CONTEXT *context, ucontext_t *sigcontext )
{
#define C(x) REGn_sig(x,sigcontext) = context->R##x
/* Restore normal registers */
C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
#undef C
SP_sig(sigcontext) = context->Sp; /* Stack pointer */
LR_sig(sigcontext) = context->Lr; /* Link register */
PC_sig(sigcontext) = context->Pc; /* Program Counter */
CPSR_sig(sigcontext) = context->Cpsr; /* Current State Register */
FP_sig(sigcontext) = context->R11; /* Frame pointer */
IP_sig(sigcontext) = context->R12; /* Intra-Procedure-call scratch register */
if (PC_sig(sigcontext) & 1) CPSR_sig(sigcontext) |= 0x20;
else CPSR_sig(sigcontext) &= ~0x20;
restore_fpu( context, sigcontext );
}
/***********************************************************************
* signal_set_full_context
*/
NTSTATUS signal_set_full_context( CONTEXT *context )
{
NTSTATUS status = NtSetContextThread( GetCurrentThread(), context );
if (!status && (context->ContextFlags & CONTEXT_INTEGER) == CONTEXT_INTEGER)
arm_thread_data()->syscall_frame->restore_flags |= CONTEXT_INTEGER;
return status;
}
/***********************************************************************
* get_native_context
*/
void *get_native_context( CONTEXT *context )
{
return context;
}
/***********************************************************************
* get_wow_context
*/
void *get_wow_context( CONTEXT *context )
{
return NULL;
}
/***********************************************************************
* NtSetContextThread (NTDLL.@)
* ZwSetContextThread (NTDLL.@)
*/
NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
{
NTSTATUS ret;
struct syscall_frame *frame = arm_thread_data()->syscall_frame;
DWORD flags = context->ContextFlags & ~CONTEXT_ARM;
BOOL self = (handle == GetCurrentThread());
if (!self)
{
ret = set_thread_context( handle, context, &self, IMAGE_FILE_MACHINE_ARMNT );
if (ret || !self) return ret;
}
if (flags & CONTEXT_INTEGER)
{
frame->r0 = context->R0;
frame->r1 = context->R1;
frame->r2 = context->R2;
frame->r3 = context->R3;
frame->r4 = context->R4;
frame->r5 = context->R5;
frame->r6 = context->R6;
frame->r7 = context->R7;
frame->r8 = context->R8;
frame->r9 = context->R9;
frame->r10 = context->R10;
frame->r11 = context->R11;
frame->r12 = context->R12;
}
if (flags & CONTEXT_CONTROL)
{
frame->sp = context->Sp;
frame->lr = context->Lr;
frame->pc = context->Pc & ~1;
frame->cpsr = context->Cpsr;
if (context->Cpsr & 0x20) frame->pc |= 1; /* thumb */
}
if (flags & CONTEXT_FLOATING_POINT)
{
frame->fpscr = context->Fpscr;
memcpy( frame->d, context->u.D, sizeof(context->u.D) );
}
frame->restore_flags |= flags & ~CONTEXT_INTEGER;
return STATUS_SUCCESS;
}
/***********************************************************************
* NtGetContextThread (NTDLL.@)
* ZwGetContextThread (NTDLL.@)
*/
NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
{
struct syscall_frame *frame = arm_thread_data()->syscall_frame;
DWORD needed_flags = context->ContextFlags & ~CONTEXT_ARM;
BOOL self = (handle == GetCurrentThread());
if (!self)
{
NTSTATUS ret = get_thread_context( handle, &context, &self, IMAGE_FILE_MACHINE_ARMNT );
if (ret || !self) return ret;
}
if (needed_flags & CONTEXT_INTEGER)
{
context->R0 = frame->r0;
context->R1 = frame->r1;
context->R2 = frame->r2;
context->R3 = frame->r3;
context->R4 = frame->r4;
context->R5 = frame->r5;
context->R6 = frame->r6;
context->R7 = frame->r7;
context->R8 = frame->r8;
context->R9 = frame->r9;
context->R10 = frame->r10;
context->R11 = frame->r11;
context->R12 = frame->r12;
context->ContextFlags |= CONTEXT_INTEGER;
}
if (needed_flags & CONTEXT_CONTROL)
{
context->Sp = frame->sp;
context->Lr = frame->lr;
context->Pc = frame->pc;
context->Cpsr = frame->cpsr;
context->ContextFlags |= CONTEXT_CONTROL;
}
if (needed_flags & CONTEXT_FLOATING_POINT)
{
context->Fpscr = frame->fpscr;
memcpy( context->u.D, frame->d, sizeof(frame->d) );
context->ContextFlags |= CONTEXT_FLOATING_POINT;
}
return STATUS_SUCCESS;
}
/***********************************************************************
* set_thread_wow64_context
*/
NTSTATUS set_thread_wow64_context( HANDLE handle, const void *ctx, ULONG size )
{
return STATUS_INVALID_INFO_CLASS;
}
/***********************************************************************
* get_thread_wow64_context
*/
NTSTATUS get_thread_wow64_context( HANDLE handle, void *ctx, ULONG size )
{
return STATUS_INVALID_INFO_CLASS;
}
__ASM_GLOBAL_FUNC( raise_func_trampoline,
"push {r12,lr}\n\t" /* (Padding +) Pc in the original frame */
"ldr r3, [r1, #0x38]\n\t" /* context->Sp */
"push {r3}\n\t" /* Original Sp */
__ASM_CFI(".cfi_escape 0x0f,0x03,0x7D,0x04,0x06\n\t") /* CFA, DW_OP_breg13 + 0x04, DW_OP_deref */
__ASM_CFI(".cfi_escape 0x10,0x0e,0x02,0x7D,0x0c\n\t") /* LR, DW_OP_breg13 + 0x0c */
__ASM_EHABI(".save {sp}\n\t")
__ASM_EHABI(".pad #-12\n\t")
__ASM_EHABI(".save {pc}\n\t")
__ASM_EHABI(".pad #8\n\t")
__ASM_EHABI(".save {lr}\n\t")
/* We can't express restoring both Pc and Lr with CFI
* directives, but we manually load Lr from the stack
* in unwind_builtin_dll above. */
"ldr r3, [r1, #0x3c]\n\t" /* context->Lr */
"push {r3}\n\t" /* Original Lr */
"blx r2\n\t"
"udf #0")
/***********************************************************************
* setup_exception
*
* Modify the signal context to call the exception raise function.
*/
static void setup_exception( ucontext_t *sigcontext, EXCEPTION_RECORD *rec )
{
struct
{
CONTEXT context;
EXCEPTION_RECORD rec;
} *stack;
void *stack_ptr = (void *)(SP_sig(sigcontext) & ~3);
CONTEXT context;
NTSTATUS status;
rec->ExceptionAddress = (void *)PC_sig(sigcontext);
save_context( &context, sigcontext );
status = send_debug_event( rec, &context, TRUE );
if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
{
restore_context( &context, sigcontext );
return;
}
stack = virtual_setup_exception( stack_ptr, sizeof(*stack), rec );
stack->rec = *rec;
stack->context = context;
/* now modify the sigcontext to return to the raise function */
SP_sig(sigcontext) = (DWORD)stack;
LR_sig(sigcontext) = context.Pc;
PC_sig(sigcontext) = (DWORD)raise_func_trampoline;
if (PC_sig(sigcontext) & 1) CPSR_sig(sigcontext) |= 0x20;
else CPSR_sig(sigcontext) &= ~0x20;
REGn_sig(0, sigcontext) = (DWORD)&stack->rec; /* first arg for KiUserExceptionDispatcher */
REGn_sig(1, sigcontext) = (DWORD)&stack->context; /* second arg for KiUserExceptionDispatcher */
REGn_sig(2, sigcontext) = (DWORD)pKiUserExceptionDispatcher;
}
/***********************************************************************
* call_user_apc_dispatcher
*/
NTSTATUS call_user_apc_dispatcher( CONTEXT *context, ULONG_PTR arg1, ULONG_PTR arg2, ULONG_PTR arg3,
PNTAPCFUNC func, NTSTATUS status )
{
struct syscall_frame *frame = arm_thread_data()->syscall_frame;
ULONG sp = context ? context->Sp : frame->sp;
struct apc_stack_layout
{
void *func;
void *align;
CONTEXT context;
} *stack;
sp &= ~15;
stack = (struct apc_stack_layout *)sp - 1;
if (context)
{
memmove( &stack->context, context, sizeof(stack->context) );
NtSetContextThread( GetCurrentThread(), &stack->context );
}
else
{
stack->context.ContextFlags = CONTEXT_FULL;
NtGetContextThread( GetCurrentThread(), &stack->context );
stack->context.R0 = status;
}
frame->sp = (DWORD)stack;
frame->pc = (DWORD)pKiUserApcDispatcher;
frame->r0 = (DWORD)&stack->context;
frame->r1 = arg1;
frame->r2 = arg2;
frame->r3 = arg3;
stack->func = func;
frame->restore_flags |= CONTEXT_CONTROL | CONTEXT_INTEGER;
return status;
}
/***********************************************************************
* call_raise_user_exception_dispatcher
*/
void call_raise_user_exception_dispatcher(void)
{
arm_thread_data()->syscall_frame->pc = (DWORD)pKiRaiseUserExceptionDispatcher;
}
/***********************************************************************
* call_user_exception_dispatcher
*/
NTSTATUS call_user_exception_dispatcher( EXCEPTION_RECORD *rec, CONTEXT *context )
{
struct syscall_frame *frame = arm_thread_data()->syscall_frame;
DWORD lr = frame->lr;
DWORD sp = frame->sp;
NTSTATUS status = NtSetContextThread( GetCurrentThread(), context );
if (status) return status;
frame->r0 = (DWORD)rec;
frame->r1 = (DWORD)context;
frame->pc = (DWORD)pKiUserExceptionDispatcher;
frame->lr = lr;
frame->sp = sp;
frame->restore_flags |= CONTEXT_INTEGER | CONTEXT_CONTROL;
return status;
}
/***********************************************************************
* call_user_mode_callback
*/
extern NTSTATUS CDECL call_user_mode_callback( void *func, void *stack, void **ret_ptr,
ULONG *ret_len, TEB *teb );
__ASM_GLOBAL_FUNC( call_user_mode_callback,
"push {r2-r12,lr}\n\t"
"ldr r4, [sp, #0x30]\n\t" /* teb */
"ldr r5, [r4]\n\t" /* teb->Tib.ExceptionList */
"str r5, [sp, #0x28]\n\t"
#ifndef __SOFTFP__
"sub sp, sp, #0x90\n\t"
"mov r5, sp\n\t"
"vmrs r6, fpscr\n\t"
"vstm r5, {d8-d15}\n\t"
"str r6, [r5, #0x80]\n\t"
#endif
"sub sp, sp, #0x160\n\t" /* sizeof(struct syscall_frame) + registers */
"ldr r5, [r4, #0x1d8]\n\t" /* arm_thread_data()->syscall_frame */
"str r5, [sp, #0x4c]\n\t" /* frame->prev_frame */
"str sp, [r4, #0x1d8]\n\t" /* arm_thread_data()->syscall_frame */
"ldr r6, [r5, #0x50]\n\t" /* prev_frame->syscall_table */
"str r6, [sp, #0x50]\n\t" /* frame->syscall_table */
"mov ip, r0\n\t"
"mov sp, r1\n\t"
"pop {r0-r3}\n\t"
"bx ip" )
/***********************************************************************
* user_mode_callback_return
*/
extern void CDECL DECLSPEC_NORETURN user_mode_callback_return( void *ret_ptr, ULONG ret_len,
NTSTATUS status, TEB *teb );
__ASM_GLOBAL_FUNC( user_mode_callback_return,
"ldr r4, [r3, #0x1d8]\n\t" /* arm_thread_data()->syscall_frame */
"ldr r5, [r4, #0x4c]\n\t" /* frame->prev_frame */
"str r5, [r3, #0x1d8]\n\t" /* arm_thread_data()->syscall_frame */
"add r5, r4, #0x160\n\t"
#ifndef __SOFTFP__
"vldm r5, {d8-d15}\n\t"
"ldr r6, [r5, #0x80]\n\t"
"vmsr fpscr, r6\n\t"
"add r5, r5, #0x90\n\t"
#endif
"mov sp, r5\n\t"
"ldr r5, [sp, #0x28]\n\t"
"str r5, [r3]\n\t" /* teb->Tib.ExceptionList */
"pop {r5, r6}\n\t" /* ret_ptr, ret_len */
"str r0, [r5]\n\t" /* ret_ptr */
"str r1, [r6]\n\t" /* ret_len */
"mov r0, r2\n\t" /* status */
"pop {r4-r12,pc}" )
/***********************************************************************
* KeUserModeCallback
*/
NTSTATUS WINAPI KeUserModeCallback( ULONG id, const void *args, ULONG len, void **ret_ptr, ULONG *ret_len )
{
struct syscall_frame *frame = arm_thread_data()->syscall_frame;
void *args_data = (void *)((frame->sp - len) & ~15);
ULONG_PTR *stack = args_data;
/* if we have no syscall frame, call the callback directly */
if ((char *)&frame < (char *)ntdll_get_thread_data()->kernel_stack ||
(char *)&frame > (char *)arm_thread_data()->syscall_frame)
{
NTSTATUS (WINAPI *func)(const void *, ULONG) = ((void **)NtCurrentTeb()->Peb->KernelCallbackTable)[id];
return func( args, len );
}
if ((char *)ntdll_get_thread_data()->kernel_stack + min_kernel_stack > (char *)&frame)
return STATUS_STACK_OVERFLOW;
memcpy( args_data, args, len );
*(--stack) = 0;
*(--stack) = len;
*(--stack) = (ULONG_PTR)args_data;
*(--stack) = id;
return call_user_mode_callback( pKiUserCallbackDispatcher, stack, ret_ptr, ret_len, NtCurrentTeb() );
}
/***********************************************************************
* NtCallbackReturn (NTDLL.@)
*/
NTSTATUS WINAPI NtCallbackReturn( void *ret_ptr, ULONG ret_len, NTSTATUS status )
{
if (!arm_thread_data()->syscall_frame->prev_frame) return STATUS_NO_CALLBACK_ACTIVE;
user_mode_callback_return( ret_ptr, ret_len, status, NtCurrentTeb() );
}
/***********************************************************************
* handle_syscall_fault
*
* Handle a page fault happening during a system call.
*/
static BOOL handle_syscall_fault( ucontext_t *context, EXCEPTION_RECORD *rec )
{
struct syscall_frame *frame = arm_thread_data()->syscall_frame;
UINT i;
if (!is_inside_syscall( context ) && !ntdll_get_thread_data()->jmp_buf) return FALSE;
TRACE( "code=%lx flags=%lx addr=%p pc=%08lx\n",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress, (DWORD)PC_sig(context) );
for (i = 0; i < rec->NumberParameters; i++)
TRACE( " info[%d]=%08lx\n", i, rec->ExceptionInformation[i] );
TRACE( " r0=%08lx r1=%08lx r2=%08lx r3=%08lx r4=%08lx r5=%08lx\n",
(DWORD)REGn_sig(0, context), (DWORD)REGn_sig(1, context), (DWORD)REGn_sig(2, context),
(DWORD)REGn_sig(3, context), (DWORD)REGn_sig(4, context), (DWORD)REGn_sig(5, context) );
TRACE( " r6=%08lx r7=%08lx r8=%08lx r9=%08lx r10=%08lx r11=%08lx\n",
(DWORD)REGn_sig(6, context), (DWORD)REGn_sig(7, context), (DWORD)REGn_sig(8, context),
(DWORD)REGn_sig(9, context), (DWORD)REGn_sig(10, context), (DWORD)FP_sig(context) );
TRACE( " r12=%08lx sp=%08lx lr=%08lx pc=%08lx cpsr=%08lx\n",
(DWORD)IP_sig(context), (DWORD)SP_sig(context), (DWORD)LR_sig(context),
(DWORD)PC_sig(context), (DWORD)CPSR_sig(context) );
if (ntdll_get_thread_data()->jmp_buf)
{
TRACE( "returning to handler\n" );
REGn_sig(0, context) = (DWORD)ntdll_get_thread_data()->jmp_buf;
REGn_sig(1, context) = 1;
PC_sig(context) = (DWORD)__wine_longjmp;
ntdll_get_thread_data()->jmp_buf = NULL;
}
else
{
TRACE( "returning to user mode ip=%08x ret=%08lx\n", frame->pc, rec->ExceptionCode );
REGn_sig(0, context) = (DWORD)frame;
REGn_sig(1, context) = rec->ExceptionCode;
PC_sig(context) = (DWORD)__wine_syscall_dispatcher_return;
}
return TRUE;
}
/**********************************************************************
* segv_handler
*
* Handler for SIGSEGV and related errors.
*/
static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD rec = { 0 };
ucontext_t *context = sigcontext;
switch (get_trap_code(signal, context))
{
case TRAP_ARM_PRIVINFLT: /* Invalid opcode exception */
switch (get_udf_immediate( context ))
{
case 0xfb: /* __fastfail */
{
CONTEXT ctx;
save_context( &ctx, sigcontext );
rec.ExceptionCode = STATUS_STACK_BUFFER_OVERRUN;
rec.ExceptionAddress = (void *)ctx.Pc;
rec.ExceptionFlags = EH_NONCONTINUABLE;
rec.NumberParameters = 1;
rec.ExceptionInformation[0] = ctx.R0;
NtRaiseException( &rec, &ctx, FALSE );
return;
}
case 0xfe: /* breakpoint */
rec.ExceptionCode = EXCEPTION_BREAKPOINT;
rec.NumberParameters = 1;
break;
default:
rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break;
}
break;
case TRAP_ARM_PAGEFLT: /* Page fault */
rec.NumberParameters = 2;
rec.ExceptionInformation[0] = (get_error_code(context) & 0x800) != 0;
rec.ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr;
rec.ExceptionCode = virtual_handle_fault( siginfo->si_addr, rec.ExceptionInformation[0],
(void *)SP_sig(context) );
if (!rec.ExceptionCode) return;
break;
case TRAP_ARM_ALIGNFLT: /* Alignment check exception */
rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
break;
case TRAP_ARM_UNKNOWN: /* Unknown fault code */
rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
rec.NumberParameters = 2;
rec.ExceptionInformation[0] = 0;
rec.ExceptionInformation[1] = 0xffffffff;
break;
default:
ERR("Got unexpected trap %d\n", get_trap_code(signal, context));
rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break;
}
if (handle_syscall_fault( context, &rec )) return;
setup_exception( context, &rec );
}
/**********************************************************************
* trap_handler
*
* Handler for SIGTRAP.
*/
static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD rec = { 0 };
switch (siginfo->si_code)
{
case TRAP_TRACE:
rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
break;
case TRAP_BRKPT:
default:
rec.ExceptionCode = EXCEPTION_BREAKPOINT;
rec.NumberParameters = 1;
break;
}
setup_exception( sigcontext, &rec );
}
/**********************************************************************
* fpe_handler
*
* Handler for SIGFPE.
*/
static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD rec = { 0 };
switch (siginfo->si_code & 0xffff )
{
#ifdef FPE_FLTSUB
case FPE_FLTSUB:
rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
break;
#endif
#ifdef FPE_INTDIV
case FPE_INTDIV:
rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
break;
#endif
#ifdef FPE_INTOVF
case FPE_INTOVF:
rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
break;
#endif
#ifdef FPE_FLTDIV
case FPE_FLTDIV:
rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
break;
#endif
#ifdef FPE_FLTOVF
case FPE_FLTOVF:
rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
break;
#endif
#ifdef FPE_FLTUND
case FPE_FLTUND:
rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
break;
#endif
#ifdef FPE_FLTRES
case FPE_FLTRES:
rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
break;
#endif
#ifdef FPE_FLTINV
case FPE_FLTINV:
#endif
default:
rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
break;
}
setup_exception( sigcontext, &rec );
}
/**********************************************************************
* int_handler
*
* Handler for SIGINT.
*/
static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
HANDLE handle;
if (!p__wine_ctrl_routine) return;
if (!NtCreateThreadEx( &handle, THREAD_ALL_ACCESS, NULL, NtCurrentProcess(),
p__wine_ctrl_routine, 0 /* CTRL_C_EVENT */, 0, 0, 0, 0, NULL ))
NtClose( handle );
}
/**********************************************************************
* abrt_handler
*
* Handler for SIGABRT.
*/
static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD rec = { EXCEPTION_WINE_ASSERTION, EH_NONCONTINUABLE };
setup_exception( sigcontext, &rec );
}
/**********************************************************************
* quit_handler
*
* Handler for SIGQUIT.
*/
static void quit_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
abort_thread(0);
}
/**********************************************************************
* usr1_handler
*
* Handler for SIGUSR1, used to signal a thread that it got suspended.
*/
static void usr1_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
CONTEXT context;
if (is_inside_syscall( sigcontext ))
{
context.ContextFlags = CONTEXT_FULL;
NtGetContextThread( GetCurrentThread(), &context );
wait_suspend( &context );
NtSetContextThread( GetCurrentThread(), &context );
}
else
{
save_context( &context, sigcontext );
wait_suspend( &context );
restore_context( &context, sigcontext );
}
}
/**********************************************************************
* get_thread_ldt_entry
*/
NTSTATUS get_thread_ldt_entry( HANDLE handle, void *data, ULONG len, ULONG *ret_len )
{
return STATUS_NOT_IMPLEMENTED;
}
/******************************************************************************
* NtSetLdtEntries (NTDLL.@)
* ZwSetLdtEntries (NTDLL.@)
*/
NTSTATUS WINAPI NtSetLdtEntries( ULONG sel1, LDT_ENTRY entry1, ULONG sel2, LDT_ENTRY entry2 )
{
return STATUS_NOT_IMPLEMENTED;
}
/**********************************************************************
* signal_init_threading
*/
void signal_init_threading(void)
{
}
/**********************************************************************
* signal_alloc_thread
*/
NTSTATUS signal_alloc_thread( TEB *teb )
{
teb->WOW32Reserved = __wine_syscall_dispatcher;
return STATUS_SUCCESS;
}
/**********************************************************************
* signal_free_thread
*/
void signal_free_thread( TEB *teb )
{
}
/**********************************************************************
* signal_init_process
*/
void signal_init_process(void)
{
struct sigaction sig_act;
void *kernel_stack = (char *)ntdll_get_thread_data()->kernel_stack + kernel_stack_size;
arm_thread_data()->syscall_frame = (struct syscall_frame *)kernel_stack - 1;
sig_act.sa_mask = server_block_set;
sig_act.sa_flags = SA_RESTART | SA_SIGINFO | SA_ONSTACK;
sig_act.sa_sigaction = int_handler;
if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = fpe_handler;
if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = abrt_handler;
if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = quit_handler;
if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = usr1_handler;
if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = trap_handler;
if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = segv_handler;
if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error;
if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error;
if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error;
return;
error:
perror("sigaction");
exit(1);
}
/***********************************************************************
* call_init_thunk
*/
void DECLSPEC_HIDDEN call_init_thunk( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend, TEB *teb )
{
struct arm_thread_data *thread_data = (struct arm_thread_data *)&teb->GdiTebBatch;
struct syscall_frame *frame = thread_data->syscall_frame;
CONTEXT *ctx, context = { CONTEXT_ALL };
__asm__ __volatile__( "mcr p15, 0, %0, c13, c0, 2" : : "r" (teb) );
context.R0 = (DWORD)entry;
context.R1 = (DWORD)arg;
context.Sp = (DWORD)teb->Tib.StackBase;
context.Pc = (DWORD)pRtlUserThreadStart;
if (context.Pc & 1) context.Cpsr |= 0x20; /* thumb mode */
if ((ctx = get_cpu_area( IMAGE_FILE_MACHINE_ARMNT ))) *ctx = context;
if (suspend) wait_suspend( &context );
ctx = (CONTEXT *)((ULONG_PTR)context.Sp & ~15) - 1;
*ctx = context;
ctx->ContextFlags = CONTEXT_FULL;
memset( frame, 0, sizeof(*frame) );
NtSetContextThread( GetCurrentThread(), ctx );
frame->sp = (DWORD)ctx;
frame->pc = (DWORD)pLdrInitializeThunk;
frame->r0 = (DWORD)ctx;
frame->prev_frame = NULL;
frame->restore_flags |= CONTEXT_INTEGER;
frame->syscall_table = KeServiceDescriptorTable;
pthread_sigmask( SIG_UNBLOCK, &server_block_set, NULL );
__wine_syscall_dispatcher_return( frame, 0 );
}
/***********************************************************************
* signal_start_thread
*/
__ASM_GLOBAL_FUNC( signal_start_thread,
__ASM_EHABI(".cantunwind\n\t")
"push {r4-r12,lr}\n\t"
/* store exit frame */
"str sp, [r3, #0x1d4]\n\t" /* arm_thread_data()->exit_frame */
/* set syscall frame */
"ldr r6, [r3, #0x1d8]\n\t" /* arm_thread_data()->syscall_frame */
"cbnz r6, 1f\n\t"
"sub r6, sp, #0x160\n\t" /* sizeof(struct syscall_frame) */
"str r6, [r3, #0x1d8]\n\t" /* arm_thread_data()->syscall_frame */
"1:\tmov sp, r6\n\t"
"bl " __ASM_NAME("call_init_thunk") )
/***********************************************************************
* signal_exit_thread
*/
__ASM_GLOBAL_FUNC( signal_exit_thread,
__ASM_EHABI(".cantunwind\n\t")
"ldr r3, [r2, #0x1d4]\n\t" /* arm_thread_data()->exit_frame */
"mov ip, #0\n\t"
"str ip, [r2, #0x1d4]\n\t"
"cmp r3, ip\n\t"
"it ne\n\t"
"movne sp, r3\n\t"
"blx r1" )
/***********************************************************************
* __wine_syscall_dispatcher
*/
__ASM_GLOBAL_FUNC( __wine_syscall_dispatcher,
__ASM_EHABI(".cantunwind\n\t")
"mrc p15, 0, r1, c13, c0, 2\n\t" /* NtCurrentTeb() */
"ldr r1, [r1, #0x1d8]\n\t" /* arm_thread_data()->syscall_frame */
"add r0, r1, #0x10\n\t"
"stm r0, {r4-r12,lr}\n\t"
"add r2, sp, #0x10\n\t"
"str r2, [r1, #0x38]\n\t"
"str r3, [r1, #0x3c]\n\t"
"mrs r0, CPSR\n\t"
"bfi r0, lr, #5, #1\n\t" /* set thumb bit */
"str r0, [r1, #0x40]\n\t"
"mov r0, #0\n\t"
"str r0, [r1, #0x44]\n\t" /* frame->restore_flags */
#ifndef __SOFTFP__
"vmrs r0, fpscr\n\t"
"str r0, [r1, #0x48]\n\t"
"add r0, r1, #0x60\n\t"
"vstm r0, {d0-d15}\n\t"
#endif
"mov r6, sp\n\t"
"mov sp, r1\n\t"
"mov r8, r1\n\t"
"ldr r5, [r1, #0x50]\n\t" /* frame->syscall_table */
"ubfx r4, ip, #12, #2\n\t" /* syscall table number */
"bfc ip, #12, #20\n\t" /* syscall number */
"add r4, r5, r4, lsl #4\n\t"
"ldr r5, [r4, #8]\n\t" /* table->ServiceLimit */
"cmp ip, r5\n\t"
"bcs 5f\n\t"
"ldr r5, [r4, #12]\n\t" /* table->ArgumentTable */
"ldrb r5, [r5, ip]\n\t"
"cmp r5, #16\n\t"
"it le\n\t"
"movle r5, #16\n\t"
"sub r0, sp, r5\n\t"
"and r0, #~7\n\t"
"mov sp, r0\n"
"2:\tsubs r5, r5, #4\n\t"
"ldr r0, [r6, r5]\n\t"
"str r0, [sp, r5]\n\t"
"bgt 2b\n\t"
"pop {r0-r3}\n\t" /* first 4 args are in registers */
"ldr r5, [r4]\n\t" /* table->ServiceTable */
"ldr ip, [r5, ip, lsl #2]\n\t"
"blx ip\n"
".L__wine_syscall_dispatcher_return:\n\t"
"ldr ip, [r8, #0x44]\n\t" /* frame->restore_flags */
#ifndef __SOFTFP__
"tst ip, #4\n\t" /* CONTEXT_FLOATING_POINT */
"beq 3f\n\t"
"ldr r4, [r8, #0x48]\n\t"
"vmsr fpscr, r4\n\t"
"add r4, r8, #0x60\n\t"
"vldm r4, {d0-d15}\n"
"3:\n\t"
#endif
"tst ip, #2\n\t" /* CONTEXT_INTEGER */
"it ne\n\t"
"ldmne r8, {r0-r3}\n\t"
"ldr lr, [r8, #0x3c]\n\t"
"ldr sp, [r8, #0x38]\n\t"
"add r8, r8, #0x10\n\t"
"ldm r8, {r4-r12,pc}\n"
"5:\tmovw r0, #0x000d\n\t" /* STATUS_INVALID_PARAMETER */
"movt r0, #0xc000\n\t"
"add sp, sp, #0x10\n\t"
"b .L__wine_syscall_dispatcher_return\n\t"
".globl " __ASM_NAME("__wine_syscall_dispatcher_return") "\n"
__ASM_NAME("__wine_syscall_dispatcher_return") ":\n\t"
"mov r8, r0\n\t"
"mov r0, r1\n\t"
"b .L__wine_syscall_dispatcher_return" )
/***********************************************************************
* __wine_unix_call_dispatcher
*/
__ASM_GLOBAL_FUNC( __wine_unix_call_dispatcher,
__ASM_EHABI(".cantunwind\n\t")
"mrc p15, 0, r1, c13, c0, 2\n\t" /* NtCurrentTeb() */
"ldr r1, [r1, #0x1d8]\n\t" /* arm_thread_data()->syscall_frame */
"add ip, r1, #0x10\n\t"
"stm ip, {r4-r12,lr}\n\t"
"str sp, [r1, #0x38]\n\t"
"str lr, [r1, #0x3c]\n\t"
"mrs r4, CPSR\n\t"
"bfi r4, lr, #5, #1\n\t" /* set thumb bit */
"str r4, [r1, #0x40]\n\t"
"mov r4, #0\n\t"
"str r4, [r1, #0x44]\n\t" /* frame->restore_flags */
#ifndef __SOFTFP__
"vmrs r4, fpscr\n\t"
"str r4, [r1, #0x48]\n\t"
"add r4, r1, #0x60\n\t"
"vstm r4, {d0-d15}\n\t"
#endif
"ldr ip, [r0, r2, lsl #2]\n\t"
"mov sp, r1\n\t"
"mov r0, r3\n\t" /* args */
"blx ip\n"
"mov r8, sp\n\t"
"ldr r1, [r8, #0x44]\n\t" /* frame->restore_flags */
"cbnz r1, 1f\n\t"
"ldr sp, [r8, #0x38]\n\t"
"add r8, r8, #0x10\n\t"
"ldm r8, {r4-r12,pc}\n\t"
"1:\tb .L__wine_syscall_dispatcher_return" )
/***********************************************************************
* __wine_setjmpex
*/
__ASM_GLOBAL_FUNC( __wine_setjmpex,
__ASM_EHABI(".cantunwind\n\t")
"stm r0, {r1,r4-r11}\n" /* jmp_buf->Frame,R4..R11 */
"str sp, [r0, #0x24]\n\t" /* jmp_buf->Sp */
"str lr, [r0, #0x28]\n\t" /* jmp_buf->Pc */
#ifndef __SOFTFP__
"vmrs r2, fpscr\n\t"
"str r2, [r0, #0x2c]\n\t" /* jmp_buf->Fpscr */
"add r0, r0, #0x30\n\t"
"vstm r0, {d8-d15}\n\t" /* jmp_buf->D[0..7] */
#endif
"mov r0, #0\n\t"
"bx lr" )
/***********************************************************************
* __wine_longjmp
*/
__ASM_GLOBAL_FUNC( __wine_longjmp,
__ASM_EHABI(".cantunwind\n\t")
"ldm r0, {r3-r11}\n\t" /* jmp_buf->Frame,R4..R11 */
"ldr sp, [r0, #0x24]\n\t" /* jmp_buf->Sp */
"ldr r2, [r0, #0x28]\n\t" /* jmp_buf->Pc */
#ifndef __SOFTFP__
"ldr r3, [r0, #0x2c]\n\t" /* jmp_buf->Fpscr */
"vmsr fpscr, r3\n\t"
"add r0, r0, #0x30\n\t"
"vldm r0, {d8-d15}\n\t" /* jmp_buf->D[0..7] */
#endif
"mov r0, r1\n\t" /* retval */
"bx r2" )
#endif /* __arm__ */
Reference in a new issue View git blame Copy permalink