X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=mono%2Fmini%2Fexceptions-arm.c;h=12a14f33218c9e119160b256a9ed7d8e22d73213;hb=b291f31d3061adb6d75d3f477945775608daf751;hp=4c73c7ee64242dbe8822b2fe0a3a8af556e7f3ae;hpb=6f94553690b1cd6487bcc206aec7f58c99f77adb;p=mono.git diff --git a/mono/mini/exceptions-arm.c b/mono/mini/exceptions-arm.c index 4c73c7ee642..12a14f33218 100644 --- a/mono/mini/exceptions-arm.c +++ b/mono/mini/exceptions-arm.c @@ -12,7 +12,12 @@ #include #include #include +#ifdef HAVE_ASM_SIGCONTEXT_H +#include +#endif /* def HAVE_ASM_SIGCONTEXT_H */ +#ifdef HAVE_UCONTEXT_H #include +#endif /* def HAVE_UCONTEXT_H */ #include #include @@ -98,16 +103,6 @@ typedef struct my_ucontext { } my_ucontext; #endif -#define restore_regs_from_context(ctx_reg,ip_reg,tmp_reg) do { \ - int reg; \ - ARM_LDR_IMM (code, ip_reg, ctx_reg, G_STRUCT_OFFSET (MonoContext, eip)); \ - ARM_ADD_REG_IMM8 (code, tmp_reg, ctx_reg, G_STRUCT_OFFSET(MonoContext, regs)); \ - ARM_LDMIA (code, tmp_reg, MONO_ARM_REGSAVE_MASK); \ - } while (0) - -/* nothing to do */ -#define setup_context(ctx) - /* * arch_get_restore_context: * @@ -115,29 +110,47 @@ typedef struct my_ucontext { * The first argument in r0 is the pointer to the context. */ gpointer -mono_arch_get_restore_context (void) +mono_arch_get_restore_context (MonoTrampInfo **info, gboolean aot) { guint8 *code; - static guint8 start [128]; - static int inited = 0; + guint8 *start; + int ctx_reg; + MonoJumpInfo *ji = NULL; + GSList *unwind_ops = NULL; + + start = code = mono_global_codeman_reserve (128); - if (inited) - return start; - inited = 1; + /* + * Move things to their proper place so we can restore all the registers with + * one instruction. + */ - code = start; - restore_regs_from_context (ARMREG_R0, ARMREG_R1, ARMREG_R2); - /* restore also the stack pointer, FIXME: handle sp != fp */ - ARM_LDR_IMM (code, ARMREG_SP, ARMREG_R0, G_STRUCT_OFFSET (MonoContext, ebp)); - ARM_LDR_IMM (code, ARMREG_FP, ARMREG_R0, G_STRUCT_OFFSET (MonoContext, esp)); + ctx_reg = ARMREG_R0; + + /* move eip to PC */ + ARM_LDR_IMM (code, ARMREG_IP, ctx_reg, G_STRUCT_OFFSET (MonoContext, eip)); + ARM_STR_IMM (code, ARMREG_IP, ctx_reg, G_STRUCT_OFFSET (MonoContext, regs) + (ARMREG_PC * 4)); + /* move sp to SP */ + ARM_LDR_IMM (code, ARMREG_IP, ctx_reg, G_STRUCT_OFFSET (MonoContext, esp)); + ARM_STR_IMM (code, ARMREG_IP, ctx_reg, G_STRUCT_OFFSET (MonoContext, regs) + (ARMREG_SP * 4)); + /* move ebp to FP */ + ARM_LDR_IMM (code, ARMREG_IP, ctx_reg, G_STRUCT_OFFSET (MonoContext, ebp)); + ARM_STR_IMM (code, ARMREG_IP, ctx_reg, G_STRUCT_OFFSET (MonoContext, regs) + (ARMREG_FP * 4)); + + /* restore everything */ + ARM_ADD_REG_IMM8 (code, ARMREG_IP, ctx_reg, G_STRUCT_OFFSET(MonoContext, regs)); + ARM_LDM (code, ARMREG_IP, 0xffff); - /* jump to the saved IP */ - ARM_MOV_REG_REG (code, ARMREG_PC, ARMREG_R1); /* never reached */ ARM_DBRK (code); - g_assert ((code - start) < sizeof(start)); + g_assert ((code - start) < 128); + mono_arch_flush_icache (start, code - start); + + if (info) + *info = mono_tramp_info_create (g_strdup_printf ("restore_context"), start, code - start, ji, unwind_ops); + return start; } @@ -149,26 +162,26 @@ mono_arch_get_restore_context (void) * @exc object in this case). */ gpointer -mono_arch_get_call_filter (void) +mono_arch_get_call_filter (MonoTrampInfo **info, gboolean aot) { - static guint8 start [320]; - static int inited = 0; guint8 *code; - int alloc_size, pos, i; - - if (inited) - return start; + guint8* start; + int ctx_reg; + MonoJumpInfo *ji = NULL; + GSList *unwind_ops = NULL; - inited = 1; /* call_filter (MonoContext *ctx, unsigned long eip, gpointer exc) */ - code = start; + start = code = mono_global_codeman_reserve (320); /* save all the regs on the stack */ ARM_MOV_REG_REG (code, ARMREG_IP, ARMREG_SP); ARM_PUSH (code, MONO_ARM_REGSAVE_MASK); /* restore all the regs from ctx (in r0), but not sp, the stack pointer */ - restore_regs_from_context (ARMREG_R0, ARMREG_IP, ARMREG_LR); + ctx_reg = ARMREG_R0; + ARM_LDR_IMM (code, ARMREG_IP, ctx_reg, G_STRUCT_OFFSET (MonoContext, eip)); + ARM_ADD_REG_IMM8 (code, ARMREG_LR, ctx_reg, G_STRUCT_OFFSET(MonoContext, regs) + (4 * 4)); + ARM_LDM (code, ARMREG_LR, MONO_ARM_REGSAVE_MASK); /* call handler at eip (r1) and set the first arg with the exception (r2) */ ARM_MOV_REG_REG (code, ARMREG_R0, ARMREG_R2); ARM_MOV_REG_REG (code, ARMREG_LR, ARMREG_PC); @@ -177,32 +190,35 @@ mono_arch_get_call_filter (void) /* epilog */ ARM_POP_NWB (code, 0xff0 | ((1 << ARMREG_SP) | (1 << ARMREG_PC))); - g_assert ((code - start) < sizeof(start)); + g_assert ((code - start) < 320); + mono_arch_flush_icache (start, code - start); + + if (info) + *info = mono_tramp_info_create (g_strdup_printf ("call_filter"), start, code - start, ji, unwind_ops); + return start; } -static void -throw_exception (MonoObject *exc, unsigned long eip, unsigned long esp, gulong *int_regs, gdouble *fp_regs) +void +mono_arm_throw_exception (MonoObject *exc, unsigned long eip, unsigned long esp, gulong *int_regs, gdouble *fp_regs) { static void (*restore_context) (MonoContext *); MonoContext ctx; gboolean rethrow = eip & 1; if (!restore_context) - restore_context = mono_arch_get_restore_context (); + restore_context = mono_get_restore_context (); eip &= ~1; /* clear the optional rethrow bit */ /* adjust eip so that it point into the call instruction */ eip -= 4; - setup_context (&ctx); - /*printf ("stack in throw: %p\n", esp);*/ - MONO_CONTEXT_SET_BP (&ctx, esp); + MONO_CONTEXT_SET_BP (&ctx, int_regs [ARMREG_FP - 4]); MONO_CONTEXT_SET_SP (&ctx, esp); MONO_CONTEXT_SET_IP (&ctx, eip); - memcpy (&ctx.regs, int_regs, sizeof (gulong) * 8); + memcpy (((guint8*)&ctx.regs) + (4 * 4), int_regs, sizeof (gulong) * 8); /* memcpy (&ctx.fregs, fp_regs, sizeof (double) * MONO_SAVED_FREGS); */ if (mono_object_isinst (exc, mono_defaults.exception_class)) { @@ -215,6 +231,12 @@ throw_exception (MonoObject *exc, unsigned long eip, unsigned long esp, gulong * g_assert_not_reached (); } +void +mono_arm_throw_exception_by_token (guint32 type_token, unsigned long eip, unsigned long esp, gulong *int_regs, gdouble *fp_regs) +{ + mono_arm_throw_exception ((MonoObject*)mono_exception_from_token (mono_defaults.corlib, type_token), eip, esp, int_regs, fp_regs); +} + /** * arch_get_throw_exception_generic: * @@ -225,33 +247,24 @@ throw_exception (MonoObject *exc, unsigned long eip, unsigned long esp, gulong * * */ static gpointer -mono_arch_get_throw_exception_generic (guint8 *start, int size, int by_token, gboolean rethrow) +mono_arch_get_throw_exception_generic (int size, gboolean corlib, gboolean rethrow, MonoTrampInfo **info, gboolean aot) { + guint8 *start; guint8 *code; - int alloc_size, pos, i; + MonoJumpInfo *ji = NULL; + GSList *unwind_ops = NULL; - code = start; + code = start = mono_global_codeman_reserve (size); /* save all the regs on the stack */ ARM_MOV_REG_REG (code, ARMREG_IP, ARMREG_SP); ARM_PUSH (code, MONO_ARM_REGSAVE_MASK); - if (by_token) { - /* r0 has the type token of the exception: get the object */ - ARM_PUSH1 (code, ARMREG_R1); - ARM_MOV_REG_REG (code, ARMREG_R1, ARMREG_R0); - code = mono_arm_emit_load_imm (code, ARMREG_R0, GPOINTER_TO_UINT (mono_defaults.corlib)); - code = mono_arm_emit_load_imm (code, ARMREG_IP, GPOINTER_TO_UINT (mono_exception_from_token)); - ARM_MOV_REG_REG (code, ARMREG_LR, ARMREG_PC); - ARM_MOV_REG_REG (code, ARMREG_PC, ARMREG_IP); - ARM_POP1 (code, ARMREG_R1); - } - /* call throw_exception (exc, ip, sp, int_regs, fp_regs) */ /* caller sp */ ARM_ADD_REG_IMM8 (code, ARMREG_R2, ARMREG_SP, 10 * 4); /* 10 saved regs */ /* exc is already in place in r0 */ - if (by_token) { + if (corlib) { /* The caller ip is already in R1 */ } else { ARM_MOV_REG_REG (code, ARMREG_R1, ARMREG_LR); /* caller ip */ @@ -264,13 +277,26 @@ mono_arch_get_throw_exception_generic (guint8 *start, int size, int by_token, gb /* we encode rethrow in the ip, so we avoid args on the stack */ ARM_ORR_REG_IMM8 (code, ARMREG_R1, ARMREG_R1, rethrow); - code = mono_arm_emit_load_imm (code, ARMREG_IP, GPOINTER_TO_UINT (throw_exception)); + if (aot) { + ji = mono_patch_info_list_prepend (ji, code - start, MONO_PATCH_INFO_JIT_ICALL_ADDR, corlib ? "mono_arm_throw_exception_by_token" : "mono_arm_throw_exception"); + ARM_LDR_IMM (code, ARMREG_IP, ARMREG_PC, 0); + ARM_B (code, 0); + *(gpointer*)(gpointer)code = NULL; + code += 4; + ARM_LDR_REG_REG (code, ARMREG_IP, ARMREG_PC, ARMREG_IP); + } else { + code = mono_arm_emit_load_imm (code, ARMREG_IP, GPOINTER_TO_UINT (corlib ? (gpointer)mono_arm_throw_exception_by_token : (gpointer)mono_arm_throw_exception)); + } ARM_MOV_REG_REG (code, ARMREG_LR, ARMREG_PC); ARM_MOV_REG_REG (code, ARMREG_PC, ARMREG_IP); /* we should never reach this breakpoint */ ARM_DBRK (code); g_assert ((code - start) < size); mono_arch_flush_icache (start, code - start); + + if (info) + *info = mono_tramp_info_create (g_strdup_printf (corlib ? "throw_corlib_exception" : (rethrow ? "rethrow_exception" : "throw_exception")), start, code - start, ji, unwind_ops); + return start; } @@ -283,17 +309,11 @@ mono_arch_get_throw_exception_generic (guint8 *start, int size, int by_token, gb * */ gpointer -mono_arch_get_rethrow_exception (void) +mono_arch_get_rethrow_exception (MonoTrampInfo **info, gboolean aot) { - static guint8 start [132]; - static int inited = 0; - - if (inited) - return start; - mono_arch_get_throw_exception_generic (start, sizeof (start), FALSE, TRUE); - inited = 1; - return start; + return mono_arch_get_throw_exception_generic (132, FALSE, TRUE, info, aot); } + /** * arch_get_throw_exception: * @@ -307,34 +327,9 @@ mono_arch_get_rethrow_exception (void) * */ gpointer -mono_arch_get_throw_exception (void) +mono_arch_get_throw_exception (MonoTrampInfo **info, gboolean aot) { - static guint8 start [132]; - static int inited = 0; - - if (inited) - return start; - mono_arch_get_throw_exception_generic (start, sizeof (start), FALSE, FALSE); - inited = 1; - return start; -} - -gpointer -mono_arch_get_throw_exception_by_name (void) -{ - static guint8* start; - static gboolean inited = FALSE; - guint8 *code; - - if (inited) - return start; - - start = code = mono_global_codeman_reserve (64); - - /* Not used on ARM */ - ARM_DBRK (code); - - return start; + return mono_arch_get_throw_exception_generic (132, FALSE, FALSE, info, aot); } /** @@ -349,170 +344,200 @@ mono_arch_get_throw_exception_by_name (void) * On ARM, the ip is passed instead of an offset. */ gpointer -mono_arch_get_throw_corlib_exception (void) +mono_arch_get_throw_corlib_exception (MonoTrampInfo **info, gboolean aot) { - static guint8 start [168]; - static int inited = 0; - - if (inited) - return start; - mono_arch_get_throw_exception_generic (start, sizeof (start), TRUE, FALSE); - inited = 1; - return start; + return mono_arch_get_throw_exception_generic (168, TRUE, FALSE, info, aot); } -/* mono_arch_find_jit_info: +/* + * mono_arch_find_jit_info_ext: * - * This function is used to gather information from @ctx. It return the - * MonoJitInfo of the corresponding function, unwinds one stack frame and - * stores the resulting context into @new_ctx. It also stores a string - * describing the stack location into @trace (if not NULL), and modifies - * the @lmf if necessary. @native_offset return the IP offset from the - * start of the function or -1 if that info is not available. + * See exceptions-amd64.c for docs; */ -MonoJitInfo * -mono_arch_find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, - MonoContext *ctx, MonoContext *new_ctx, char **trace, MonoLMF **lmf, - int *native_offset, gboolean *managed) +gboolean +mono_arch_find_jit_info_ext (MonoDomain *domain, MonoJitTlsData *jit_tls, + MonoJitInfo *ji, MonoContext *ctx, + MonoContext *new_ctx, MonoLMF **lmf, + StackFrameInfo *frame) { - MonoJitInfo *ji; gpointer ip = MONO_CONTEXT_GET_IP (ctx); - /* Avoid costly table lookup during stack overflow */ - if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size))) - ji = prev_ji; - else - ji = mono_jit_info_table_find (domain, ip); + memset (frame, 0, sizeof (StackFrameInfo)); + frame->ji = ji; + frame->managed = FALSE; - if (managed) - *managed = FALSE; + *new_ctx = *ctx; if (ji != NULL) { - int offset; - - *new_ctx = *ctx; - - if (managed) - if (!ji->method->wrapper_type) - *managed = TRUE; - - /* - * Some managed methods like pinvoke wrappers might have save_lmf set. - * In this case, register save/restore code is not generated by the - * JIT, so we have to restore callee saved registers from the lmf. - */ - if (ji->method->save_lmf) { - /* - * We only need to do this if the exception was raised in managed - * code, since otherwise the lmf was already popped of the stack. - */ - if (*lmf && (MONO_CONTEXT_GET_BP (ctx) >= (gpointer)(*lmf)->ebp)) { - memcpy (&new_ctx->regs [0], &(*lmf)->iregs [4], sizeof (gulong) * MONO_SAVED_GREGS); - } - new_ctx->esp = (*lmf)->iregs [12]; - new_ctx->eip = (*lmf)->iregs [13]; - new_ctx->ebp = new_ctx->esp; - } else { - int i; - char* sp; - offset = ji->used_regs >> 16; - offset <<= 2; - /* the saved regs are at sp + offset */ - /* restore caller saved registers */ - sp = (char*)ctx->ebp; - sp += offset; - for (i = 4; i < 16; ++i) { - if (ji->used_regs & (1 << i)) { - new_ctx->regs [i - 4] = *(gulong*)sp; - sp += sizeof (gulong); - } - } - /* IP and LR */ - new_ctx->esp = *(gulong*)sp; - sp += sizeof (gulong); - new_ctx->eip = *(gulong*)sp; - sp += sizeof (gulong); - new_ctx->ebp = new_ctx->esp; - } + int i; + gssize regs [MONO_MAX_IREGS + 1]; + guint8 *cfa; + guint32 unwind_info_len; + guint8 *unwind_info; + + frame->type = FRAME_TYPE_MANAGED; + + if (!ji->method->wrapper_type || ji->method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD) + frame->managed = TRUE; + + if (ji->from_aot) + unwind_info = mono_aot_get_unwind_info (ji, &unwind_info_len); + else + unwind_info = mono_get_cached_unwind_info (ji->used_regs, &unwind_info_len); + + for (i = 0; i < 16; ++i) + regs [i] = new_ctx->regs [i]; + regs [ARMREG_SP] = new_ctx->esp; + + mono_unwind_frame (unwind_info, unwind_info_len, ji->code_start, + (guint8*)ji->code_start + ji->code_size, + ip, regs, MONO_MAX_IREGS, &cfa); + + for (i = 0; i < 16; ++i) + new_ctx->regs [i] = regs [i]; + new_ctx->eip = regs [ARMREG_LR]; + new_ctx->esp = (gsize)cfa; + new_ctx->ebp = new_ctx->esp; if (*lmf && (MONO_CONTEXT_GET_BP (ctx) >= (gpointer)(*lmf)->ebp)) { /* remove any unused lmf */ - *lmf = (*lmf)->previous_lmf; + *lmf = (gpointer)(((gsize)(*lmf)->previous_lmf) & ~3); } /* we substract 1, so that the IP points into the call instruction */ new_ctx->eip--; - return ji; + return TRUE; } else if (*lmf) { - - *new_ctx = *ctx; - if ((ji = mono_jit_info_table_find (domain, (gpointer)(*lmf)->eip))) { + if (((gsize)(*lmf)->previous_lmf) & 2) { + /* + * This LMF entry is created by the soft debug code to mark transitions to + * managed code done during invokes. + */ + MonoLMFExt *ext = (MonoLMFExt*)(*lmf); + + g_assert (ext->debugger_invoke); + + memcpy (new_ctx, &ext->ctx, sizeof (MonoContext)); + + *lmf = (gpointer)(((gsize)(*lmf)->previous_lmf) & ~3); + + frame->type = FRAME_TYPE_DEBUGGER_INVOKE; + + return TRUE; + } + + frame->type = FRAME_TYPE_MANAGED_TO_NATIVE; + + if ((ji = mini_jit_info_table_find (domain, (gpointer)(*lmf)->eip, NULL))) { + frame->ji = ji; } else { if (!(*lmf)->method) - return (gpointer)-1; - memset (res, 0, sizeof (MonoJitInfo)); - res->method = (*lmf)->method; + return FALSE; + frame->method = (*lmf)->method; } - memcpy (&new_ctx->regs [0], &(*lmf)->iregs [4], sizeof (gulong) * MONO_SAVED_GREGS); - new_ctx->esp = (*lmf)->iregs [12]; + memcpy (&new_ctx->regs [0], &(*lmf)->iregs [0], sizeof (gulong) * 13); + /* SP is skipped */ + new_ctx->regs [ARMREG_LR] = (*lmf)->iregs [ARMREG_LR - 1]; + /* This is the sp for the current frame */ + new_ctx->esp = (*lmf)->iregs [ARMREG_FP]; new_ctx->eip = (*lmf)->iregs [13]; new_ctx->ebp = new_ctx->esp; - *lmf = (*lmf)->previous_lmf; + *lmf = (gpointer)(((gsize)(*lmf)->previous_lmf) & ~3); - return ji ? ji : res; + return TRUE; } - return NULL; + return FALSE; } void mono_arch_sigctx_to_monoctx (void *sigctx, MonoContext *mctx) { #if BROKEN_LINUX - struct ucontext *uc = sigctx; - - mctx->eip = uc->uc_mcontext.gregs [ARMREG_PC]; - mctx->ebp = uc->uc_mcontext.gregs [ARMREG_SP]; - memcpy (&mctx->regs, &uc->uc_mcontext.gregs [ARMREG_R4], sizeof (gulong) * 8); - /* memcpy (&mctx->fregs, &uc->uc_mcontext.uc_regs->fpregs.fpregs [14], sizeof (double) * MONO_SAVED_FREGS);*/ + g_assert_not_reached (); #else my_ucontext *my_uc = sigctx; mctx->eip = UCONTEXT_REG_PC (my_uc); - mctx->ebp = UCONTEXT_REG_SP (my_uc); - memcpy (&mctx->regs, &UCONTEXT_REG_R4 (my_uc), sizeof (gulong) * 8); + mctx->esp = UCONTEXT_REG_SP (my_uc); + memcpy (&mctx->regs, &UCONTEXT_REG_R0 (my_uc), sizeof (gulong) * 16); #endif + mctx->ebp = mctx->regs [ARMREG_FP]; } void mono_arch_monoctx_to_sigctx (MonoContext *mctx, void *ctx) { #if BROKEN_LINUX - struct ucontext *uc = ctx; - - uc->uc_mcontext.gregs [ARMREG_PC] = mctx->eip; - uc->uc_mcontext.gregs [ARMREG_SP] = mctx->ebp; - memcpy (&uc->uc_mcontext.gregs [ARMREG_R4], &mctx->regs, sizeof (gulong) * 8); - /* memcpy (&uc->uc_mcontext.uc_regs->fpregs.fpregs [14], &mctx->fregs, sizeof (double) * MONO_SAVED_FREGS);*/ + g_assert_not_reached (); #else my_ucontext *my_uc = ctx; UCONTEXT_REG_PC (my_uc) = mctx->eip; UCONTEXT_REG_SP (my_uc) = mctx->ebp; - memcpy (&UCONTEXT_REG_R4 (my_uc), &mctx->regs, sizeof (gulong) * 8); + /* The upper registers are not guaranteed to be valid */ + memcpy (&UCONTEXT_REG_R0 (my_uc), &mctx->regs, sizeof (gulong) * 12); #endif } +/* + * handle_exception: + * + * Called by resuming from a signal handler. + */ +static void +handle_signal_exception (gpointer obj, gboolean test_only) +{ + MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id); + MonoContext ctx; + static void (*restore_context) (MonoContext *); + + if (!restore_context) + restore_context = mono_get_restore_context (); + + memcpy (&ctx, &jit_tls->ex_ctx, sizeof (MonoContext)); + + mono_handle_exception (&ctx, obj, MONO_CONTEXT_GET_IP (&ctx), test_only); + + restore_context (&ctx); +} + /* * This is the function called from the signal handler */ gboolean mono_arch_handle_exception (void *ctx, gpointer obj, gboolean test_only) { +#if defined(MONO_CROSS_COMPILE) + g_assert_not_reached (); +#elif defined(MONO_ARCH_USE_SIGACTION) + my_ucontext *sigctx = ctx; + /* + * Handling the exception in the signal handler is problematic, since the original + * signal is disabled, and we could run arbitrary code though the debugger. So + * resume into the normal stack and do most work there if possible. + */ + MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id); + guint64 sp = UCONTEXT_REG_SP (sigctx); + + /* Pass the ctx parameter in TLS */ + mono_arch_sigctx_to_monoctx (sigctx, &jit_tls->ex_ctx); + /* The others in registers */ + UCONTEXT_REG_R0 (sigctx) = (gsize)obj; + UCONTEXT_REG_R1 (sigctx) = test_only; + + /* Allocate a stack frame */ + sp -= 16; + UCONTEXT_REG_SP (sigctx) = sp; + + UCONTEXT_REG_PC (sigctx) = (gsize)handle_signal_exception; + + return TRUE; +#else MonoContext mctx; gboolean result; @@ -524,14 +549,14 @@ mono_arch_handle_exception (void *ctx, gpointer obj, gboolean test_only) */ mono_arch_monoctx_to_sigctx (&mctx, ctx); return result; +#endif } gpointer mono_arch_ip_from_context (void *sigctx) { #if BROKEN_LINUX - struct ucontext *uc = sigctx; - return (gpointer)uc->uc_mcontext.gregs [ARMREG_PC]; + g_assert_not_reached (); #else my_ucontext *my_uc = sigctx; return (void*) UCONTEXT_REG_PC (my_uc);