#include <glib.h>
#include <signal.h>
#include <string.h>
+
+#ifndef MONO_CROSS_COMPILE
+#ifdef HAVE_ASM_SIGCONTEXT_H
+#include <asm/sigcontext.h>
+#endif /* def HAVE_ASM_SIGCONTEXT_H */
+#endif
+
+#ifdef HAVE_UCONTEXT_H
#include <ucontext.h>
+#endif /* def HAVE_UCONTEXT_H */
#include <mono/arch/arm/arm-codegen.h>
+#include <mono/arch/arm/arm-vfp-codegen.h>
#include <mono/metadata/appdomain.h>
#include <mono/metadata/tabledefs.h>
#include <mono/metadata/threads.h>
#include "mini.h"
#include "mini-arm.h"
-
-static gboolean arch_handle_exception (MonoContext *ctx, gpointer obj, gboolean test_only);
-
-/*
-
-struct sigcontext {
- unsigned long trap_no;
- unsigned long error_code;
- unsigned long oldmask;
- unsigned long arm_r0;
- unsigned long arm_r1;
- unsigned long arm_r2;
- unsigned long arm_r3;
- unsigned long arm_r4;
- unsigned long arm_r5;
- unsigned long arm_r6;
- unsigned long arm_r7;
- unsigned long arm_r8;
- unsigned long arm_r9;
- unsigned long arm_r10;
- unsigned long arm_fp;
- unsigned long arm_ip;
- unsigned long arm_sp;
- unsigned long arm_lr;
- unsigned long arm_pc;
- unsigned long arm_cpsr;
- unsigned long fault_address;
-};
-
-gregs below is this struct
-struct user_regs {
- unsigned long int uregs[18];
-};
-
-the companion user_fpregs has just 8 double registers
-(it's valid for FPA mode, will need changes for VFP)
-
-typedef struct {
- gregset_t gregs;
- fpregset_t fpregs;
-} mcontext_t;
-
-typedef struct ucontext {
- unsigned long int uc_flags;
- struct ucontext *uc_link;
- __sigset_t uc_sigmask;
- stack_t uc_stack;
- mcontext_t uc_mcontext;
- long int uc_filler[5];
-} ucontext_t;
-
-*/
-
-/*
- * So, it turns out that the ucontext struct defined by libc is incorrect.
- * We define our own version here and use it instead.
- */
-
-typedef struct my_ucontext {
- unsigned long uc_flags;
- struct my_ucontext *uc_link;
- struct {
- void *p;
- int flags;
- size_t size;
- } sstack_data;
- struct sigcontext sig_ctx;
- /* some 2.6.x kernel has fp data here after a few other fields
- * we don't use them for now...
- */
-} my_ucontext;
-
-#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)
+#include "mono/utils/mono-sigcontext.h"
/*
* arch_get_restore_context:
* 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;
-
- if (inited)
- return start;
- inited = 1;
-
- 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));
- /* jump to the saved IP */
- ARM_MOV_REG_REG (code, ARMREG_PC, ARMREG_R1);
+ guint8 *start;
+ int ctx_reg;
+ MonoJumpInfo *ji = NULL;
+ GSList *unwind_ops = NULL;
+
+ start = code = mono_global_codeman_reserve (128);
+
+ /*
+ * Move things to their proper place so we can restore all the registers with
+ * one instruction.
+ */
+
+ ctx_reg = ARMREG_R0;
+
+#if defined(ARM_FPU_VFP)
+ ARM_ADD_REG_IMM8 (code, ARMREG_IP, ctx_reg, G_STRUCT_OFFSET (MonoContext, fregs));
+ ARM_FLDMD (code, ARM_VFP_D0, 16, ARMREG_IP);
+#endif
+
+ /* move pc to PC */
+ ARM_LDR_IMM (code, ARMREG_IP, ctx_reg, G_STRUCT_OFFSET (MonoContext, pc));
+ ARM_STR_IMM (code, ARMREG_IP, ctx_reg, G_STRUCT_OFFSET (MonoContext, regs) + (ARMREG_PC * sizeof (mgreg_t)));
+
+ /* restore everything */
+ ARM_ADD_REG_IMM8 (code, ARMREG_IP, ctx_reg, G_STRUCT_OFFSET(MonoContext, regs));
+ ARM_LDM (code, ARMREG_IP, 0xffff);
+
/* 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;
}
* @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;
+ guint8* start;
+ int ctx_reg;
+ MonoJumpInfo *ji = NULL;
+ GSList *unwind_ops = NULL;
- if (inited)
- return start;
-
- 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, pc));
+ ARM_ADD_REG_IMM8 (code, ARMREG_LR, ctx_reg, G_STRUCT_OFFSET(MonoContext, regs) + (MONO_ARM_FIRST_SAVED_REG * sizeof (mgreg_t)));
+ 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);
/* 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, mgreg_t pc, mgreg_t sp, mgreg_t *int_regs, gdouble *fp_regs)
{
static void (*restore_context) (MonoContext *);
MonoContext ctx;
- gboolean rethrow = eip & 1;
+ gboolean rethrow = pc & 1;
if (!restore_context)
- restore_context = mono_arch_get_restore_context ();
+ restore_context = mono_get_restore_context ();
- eip &= ~1; /* clear the optional rethrow bit */
+ pc &= ~1; /* clear the optional rethrow bit */
/* adjust eip so that it point into the call instruction */
- eip -= 4;
-
- setup_context (&ctx);
+ pc -= 4;
/*printf ("stack in throw: %p\n", esp);*/
- MONO_CONTEXT_SET_BP (&ctx, esp);
- MONO_CONTEXT_SET_IP (&ctx, eip);
- memcpy (&ctx.regs, int_regs, sizeof (gulong) * 8);
- /* memcpy (&ctx.fregs, fp_regs, sizeof (double) * MONO_SAVED_FREGS); */
+ MONO_CONTEXT_SET_BP (&ctx, int_regs [ARMREG_FP - 4]);
+ MONO_CONTEXT_SET_SP (&ctx, sp);
+ MONO_CONTEXT_SET_IP (&ctx, pc);
+ memcpy (((guint8*)&ctx.regs) + (ARMREG_R4 * sizeof (mgreg_t)), int_regs, 8 * sizeof (mgreg_t));
+ memcpy (&ctx.fregs, fp_regs, sizeof (double) * 16);
if (mono_object_isinst (exc, mono_defaults.exception_class)) {
MonoException *mono_ex = (MonoException*)exc;
if (!rethrow)
mono_ex->stack_trace = NULL;
}
- mono_handle_exception (&ctx, exc, (gpointer)(eip + 4), FALSE);
+ mono_handle_exception (&ctx, exc);
restore_context (&ctx);
g_assert_not_reached ();
}
+void
+mono_arm_throw_exception_by_token (guint32 type_token, mgreg_t pc, mgreg_t sp, mgreg_t *int_regs, gdouble *fp_regs)
+{
+ /* Clear thumb bit */
+ pc &= ~1;
+
+ mono_arm_throw_exception ((MonoObject*)mono_exception_from_token (mono_defaults.corlib, type_token), pc, sp, int_regs, fp_regs);
+}
+
+void
+mono_arm_resume_unwind (guint32 dummy1, mgreg_t pc, mgreg_t sp, mgreg_t *int_regs, gdouble *fp_regs)
+{
+ MonoContext ctx;
+
+ pc &= ~1; /* clear the optional rethrow bit */
+ /* adjust eip so that it point into the call instruction */
+ pc -= 4;
+
+ MONO_CONTEXT_SET_BP (&ctx, int_regs [ARMREG_FP - 4]);
+ MONO_CONTEXT_SET_SP (&ctx, sp);
+ MONO_CONTEXT_SET_IP (&ctx, pc);
+ memcpy (((guint8*)&ctx.regs) + (ARMREG_R4 * sizeof (mgreg_t)), int_regs, 8 * sizeof (mgreg_t));
+
+ mono_resume_unwind (&ctx);
+}
+
/**
- * arch_get_throw_exception_generic:
+ * get_throw_trampoline:
*
* Returns a function pointer which can be used to raise
* exceptions. The returned function has the following
* signature: void (*func) (MonoException *exc); or
- * void (*func) (char *exc_name);
+ * void (*func) (guint32 ex_token, guint8* ip);
*
*/
static gpointer
-mono_arch_get_throw_exception_generic (guint8 *start, int size, int by_name, gboolean rethrow)
+get_throw_trampoline (int size, gboolean corlib, gboolean rethrow, gboolean llvm, gboolean resume_unwind, const char *tramp_name, MonoTrampInfo **info, gboolean aot)
{
+ guint8 *start;
guint8 *code;
- int alloc_size, pos, i;
+ MonoJumpInfo *ji = NULL;
+ GSList *unwind_ops = NULL;
+ int cfa_offset;
- code = start;
+ code = start = mono_global_codeman_reserve (size);
+
+ mono_add_unwind_op_def_cfa (unwind_ops, code, start, ARMREG_SP, 0);
/* 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_name) {
- /* r0 has the name of the exception: get the object */
- ARM_MOV_REG_REG (code, ARMREG_R2, 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_R1, GPOINTER_TO_UINT ("System"));
- code = mono_arm_emit_load_imm (code, ARMREG_IP, GPOINTER_TO_UINT (mono_exception_from_name));
- ARM_MOV_REG_REG (code, ARMREG_LR, ARMREG_PC);
- ARM_MOV_REG_REG (code, ARMREG_PC, ARMREG_IP);
- }
+ cfa_offset = MONO_ARM_NUM_SAVED_REGS * sizeof (mgreg_t);
+ mono_add_unwind_op_def_cfa (unwind_ops, code, start, ARMREG_SP, cfa_offset);
+ mono_add_unwind_op_offset (unwind_ops, code, start, ARMREG_LR, - sizeof (mgreg_t));
+
+ /* Save fp regs */
+ ARM_SUB_REG_IMM8 (code, ARMREG_SP, ARMREG_SP, sizeof (double) * 16);
+ cfa_offset += sizeof (double) * 16;
+ mono_add_unwind_op_def_cfa_offset (unwind_ops, code, start, cfa_offset);
+#if defined(ARM_FPU_VFP)
+ ARM_FSTMD (code, ARM_VFP_D0, 16, ARMREG_SP);
+#endif
+
+ /* Param area */
+ ARM_SUB_REG_IMM8 (code, ARMREG_SP, ARMREG_SP, 8);
+ cfa_offset += 8;
+ mono_add_unwind_op_def_cfa_offset (unwind_ops, code, start, cfa_offset);
/* 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 */
+ ARM_ADD_REG_IMM8 (code, ARMREG_R2, ARMREG_SP, cfa_offset);
/* exc is already in place in r0 */
- if (by_name)
- ARM_LDR_IMM (code, ARMREG_R1, ARMREG_SP, 9 * 4); /* pos on the stack were lr was saved */
- else
+ if (corlib) {
+ /* The caller ip is already in R1 */
+ if (llvm)
+ /* Negate the ip adjustment done in mono_arm_throw_exception */
+ ARM_ADD_REG_IMM8 (code, ARMREG_R1, ARMREG_R1, 4);
+ } else {
ARM_MOV_REG_REG (code, ARMREG_R1, ARMREG_LR); /* caller ip */
- /* FIXME: pointer to the saved fp regs */
- /*pos = alloc_size - sizeof (double) * MONO_SAVED_FREGS;
- ppc_addi (code, ppc_r7, ppc_sp, pos);*/
- /* pointer to the saved int regs */
- ARM_MOV_REG_REG (code, ARMREG_R3, ARMREG_SP); /* the pushed regs */
- /* we encode rethrow in the ip, so we avoid args on the stack */
+ }
+ /* int regs */
+ ARM_ADD_REG_IMM8 (code, ARMREG_R3, ARMREG_SP, (cfa_offset - (MONO_ARM_NUM_SAVED_REGS * sizeof (mgreg_t))));
+ /* we encode rethrow in the ip */
ARM_ORR_REG_IMM8 (code, ARMREG_R1, ARMREG_R1, rethrow);
-
- code = mono_arm_emit_load_imm (code, ARMREG_IP, GPOINTER_TO_UINT (throw_exception));
+ /* fp regs */
+ ARM_ADD_REG_IMM8 (code, ARMREG_LR, ARMREG_SP, 8);
+ ARM_STR_IMM (code, ARMREG_LR, ARMREG_SP, 0);
+
+ if (aot) {
+ const char *icall_name;
+
+ if (resume_unwind)
+ icall_name = "mono_arm_resume_unwind";
+ else if (corlib)
+ icall_name = "mono_arm_throw_exception_by_token";
+ else
+ icall_name = "mono_arm_throw_exception";
+
+ ji = mono_patch_info_list_prepend (ji, code - start, MONO_PATCH_INFO_JIT_ICALL_ADDR, icall_name);
+ 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 (resume_unwind ? (gpointer)mono_arm_resume_unwind : (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);
- return start;
-}
-/**
- * mono_arch_get_rethrow_exception:
- *
- * Returns a function pointer which can be used to rethrow
- * exceptions. The returned function has the following
- * signature: void (*func) (MonoException *exc);
- *
- */
-gpointer
-mono_arch_get_rethrow_exception (void)
-{
- static guint8 start [132];
- static int inited = 0;
+ if (info)
+ *info = mono_tramp_info_create (g_strdup_printf (tramp_name), start, code - start, ji, unwind_ops);
- if (inited)
- return start;
- mono_arch_get_throw_exception_generic (start, sizeof (start), FALSE, TRUE);
- inited = 1;
return start;
}
+
/**
* arch_get_throw_exception:
*
*
*/
gpointer
-mono_arch_get_throw_exception (void)
+mono_arch_get_throw_exception (MonoTrampInfo **info, gboolean aot)
{
- static guint8 start [132];
- static int inited = 0;
+ return get_throw_trampoline (132, FALSE, FALSE, FALSE, FALSE, "throw_exception", info, aot);
+}
- if (inited)
- return start;
- mono_arch_get_throw_exception_generic (start, sizeof (start), FALSE, FALSE);
- inited = 1;
- return start;
+/**
+ * mono_arch_get_rethrow_exception:
+ *
+ * Returns a function pointer which can be used to rethrow
+ * exceptions. The returned function has the following
+ * signature: void (*func) (MonoException *exc);
+ *
+ */
+gpointer
+mono_arch_get_rethrow_exception (MonoTrampInfo **info, gboolean aot)
+{
+ return get_throw_trampoline (132, FALSE, TRUE, FALSE, FALSE, "rethrow_exception", info, aot);
}
/**
- * arch_get_throw_exception_by_name:
+ * mono_arch_get_throw_corlib_exception:
*
* Returns a function pointer which can be used to raise
* corlib exceptions. The returned function has the following
- * signature: void (*func) (char *exc_name);
- * For example to raise an arithmetic exception you can use:
- *
- * x86_push_imm (code, "ArithmeticException");
- * x86_call_code (code, arch_get_throw_exception_by_name ());
- *
+ * signature: void (*func) (guint32 ex_token, guint32 offset);
+ * Here, offset is the offset which needs to be substracted from the caller IP
+ * to get the IP of the throw. Passing the offset has the advantage that it
+ * needs no relocations in the caller.
+ * On ARM, the ip is passed instead of an offset.
*/
gpointer
-mono_arch_get_throw_exception_by_name (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 get_throw_trampoline (168, TRUE, FALSE, FALSE, FALSE, "throw_corlib_exception", info, aot);
}
-static MonoArray *
-glist_to_array (GList *list, MonoClass *eclass)
+GSList*
+mono_arm_get_exception_trampolines (gboolean aot)
{
- MonoDomain *domain = mono_domain_get ();
- MonoArray *res;
- int len, i;
+ MonoTrampInfo *info;
+ GSList *tramps = NULL;
- if (!list)
- return NULL;
+ /* LLVM uses the normal trampolines, but with a different name */
+ get_throw_trampoline (168, TRUE, FALSE, FALSE, FALSE, "llvm_throw_corlib_exception_trampoline", &info, aot);
+ tramps = g_slist_prepend (tramps, info);
+
+ get_throw_trampoline (168, TRUE, FALSE, TRUE, FALSE, "llvm_throw_corlib_exception_abs_trampoline", &info, aot);
+ tramps = g_slist_prepend (tramps, info);
- len = g_list_length (list);
- res = mono_array_new (domain, eclass, len);
+ get_throw_trampoline (168, FALSE, FALSE, FALSE, TRUE, "llvm_resume_unwind_trampoline", &info, aot);
+ tramps = g_slist_prepend (tramps, info);
- for (i = 0; list; list = list->next, i++)
- mono_array_set (res, gpointer, i, list->data);
+ return tramps;
+}
- return res;
+void
+mono_arch_exceptions_init (void)
+{
+ guint8 *tramp;
+ GSList *tramps, *l;
+
+ if (mono_aot_only) {
+ tramp = mono_aot_get_trampoline ("llvm_throw_corlib_exception_trampoline");
+ mono_register_jit_icall (tramp, "llvm_throw_corlib_exception_trampoline", NULL, TRUE);
+ tramp = mono_aot_get_trampoline ("llvm_throw_corlib_exception_abs_trampoline");
+ mono_register_jit_icall (tramp, "llvm_throw_corlib_exception_abs_trampoline", NULL, TRUE);
+ tramp = mono_aot_get_trampoline ("llvm_resume_unwind_trampoline");
+ mono_register_jit_icall (tramp, "llvm_resume_unwind_trampoline", NULL, TRUE);
+ } else {
+ tramps = mono_arm_get_exception_trampolines (FALSE);
+ for (l = tramps; l; l = l->next) {
+ MonoTrampInfo *info = l->data;
+
+ mono_register_jit_icall (info->code, g_strdup (info->name), NULL, TRUE);
+ mono_save_trampoline_xdebug_info (info);
+ mono_tramp_info_free (info);
+ }
+ g_slist_free (tramps);
+ }
}
-/* mono_arch_find_jit_info:
+/*
+ * mono_arch_find_jit_info:
*
- * 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 (MonoDomain *domain, MonoJitTlsData *jit_tls,
+ MonoJitInfo *ji, MonoContext *ctx,
+ MonoContext *new_ctx, MonoLMF **lmf,
+ mgreg_t **save_locations,
+ 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;
- if (managed)
- *managed = FALSE;
+ *new_ctx = *ctx;
if (ji != NULL) {
- int offset;
+ int i;
+ gssize regs [MONO_MAX_IREGS + 1];
+ guint8 *cfa;
+ guint32 unwind_info_len;
+ guint8 *unwind_info;
- *new_ctx = *ctx;
+ frame->type = FRAME_TYPE_MANAGED;
- if (managed)
- if (!ji->method->wrapper_type)
- *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);
- /*
- * 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;
- }
+ for (i = 0; i < 16; ++i)
+ regs [i] = new_ctx->regs [i];
+
+ mono_unwind_frame (unwind_info, unwind_info_len, ji->code_start,
+ (guint8*)ji->code_start + ji->code_size,
+ ip, regs, MONO_MAX_IREGS,
+ save_locations, MONO_MAX_IREGS, &cfa);
- if (*lmf && (MONO_CONTEXT_GET_BP (ctx) >= (gpointer)(*lmf)->ebp)) {
+ for (i = 0; i < 16; ++i)
+ new_ctx->regs [i] = regs [i];
+ new_ctx->pc = regs [ARMREG_LR];
+ new_ctx->regs [ARMREG_SP] = (gsize)cfa;
+
+ if (*lmf && (MONO_CONTEXT_GET_SP (ctx) >= (gpointer)(*lmf)->sp)) {
/* remove any unused lmf */
- *lmf = (*lmf)->previous_lmf;
+ *lmf = (gpointer)(((gsize)(*lmf)->previous_lmf) & ~3);
}
+ /* Clear thumb bit */
+ new_ctx->pc &= ~1;
+
/* we substract 1, so that the IP points into the call instruction */
- new_ctx->eip--;
+ new_ctx->pc--;
- return ji;
+ return TRUE;
} else if (*lmf) {
-
- *new_ctx = *ctx;
- if (!(*lmf)->method)
- return (gpointer)-1;
+ 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));
- if ((ji = mono_jit_info_table_find (domain, (gpointer)(*lmf)->eip))) {
+ *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)->ip, NULL))) {
+ frame->ji = ji;
} else {
- memset (res, 0, sizeof (MonoJitInfo));
- res->method = (*lmf)->method;
+ if (!(*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];
- new_ctx->eip = (*lmf)->iregs [13];
- new_ctx->ebp = new_ctx->esp;
+ /*
+ * The LMF is saved at the start of the method using:
+ * ARM_MOV_REG_REG (code, ARMREG_IP, ARMREG_SP)
+ * ARM_PUSH (code, 0x5ff0);
+ * So it stores the register state as it existed at the caller. We need to
+ * produce the register state which existed at the time of the call which
+ * transitioned to native call, so we save the sp/fp/ip in the LMF.
+ */
+ memcpy (&new_ctx->regs [0], &(*lmf)->iregs [0], sizeof (mgreg_t) * 13);
+ new_ctx->pc = (*lmf)->ip;
+ new_ctx->regs [ARMREG_SP] = (*lmf)->sp;
+ new_ctx->regs [ARMREG_FP] = (*lmf)->fp;
+
+ /* Clear thumb bit */
+ new_ctx->pc &= ~1;
- *lmf = (*lmf)->previous_lmf;
+ /* we substract 1, so that the IP points into the call instruction */
+ new_ctx->pc--;
- return ji ? ji : res;
+ *lmf = (gpointer)(((gsize)(*lmf)->previous_lmf) & ~3);
+
+ return TRUE;
}
- return NULL;
+ return FALSE;
+}
+
+#if MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
+void
+mono_arch_sigctx_to_monoctx (void *sigctx, MonoContext *mctx)
+{
+ mono_sigctx_to_monoctx (sigctx, mctx);
+}
+
+void
+mono_arch_monoctx_to_sigctx (MonoContext *mctx, void *ctx)
+{
+ mono_monoctx_to_sigctx (mctx, ctx);
+}
+#endif /* MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX */
+
+/*
+ * handle_exception:
+ *
+ * Called by resuming from a signal handler.
+ */
+static void
+handle_signal_exception (gpointer obj)
+{
+ MonoJitTlsData *jit_tls = mono_native_tls_get_value (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);
+
+ restore_context (&ctx);
+}
+
+/*
+ * This works around a gcc 4.5 bug:
+ * https://bugs.launchpad.net/ubuntu/+source/gcc-4.5/+bug/721531
+ */
+#if defined(__GNUC__)
+__attribute__((noinline))
+#endif
+static gpointer
+get_handle_signal_exception_addr (void)
+{
+ return handle_signal_exception;
}
/*
* This is the function called from the signal handler
*/
gboolean
-mono_arch_handle_exception (void *ctx, gpointer obj, gboolean test_only)
+mono_arch_handle_exception (void *ctx, gpointer obj)
{
-#if BROKEN_LINUX
- struct ucontext *uc = ctx;
-#else
- my_ucontext *my_uc = ctx;
+#if defined(MONO_CROSS_COMPILE) || !defined(MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX)
+ g_assert_not_reached ();
+#elif defined(MONO_ARCH_USE_SIGACTION)
+ arm_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 = mono_native_tls_get_value (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;
+
+ /* Allocate a stack frame */
+ sp -= 16;
+ UCONTEXT_REG_SP (sigctx) = sp;
+
+ UCONTEXT_REG_PC (sigctx) = (gsize)get_handle_signal_exception_addr ();
+#ifdef UCONTEXT_REG_CPSR
+ if ((gsize)UCONTEXT_REG_PC (sigctx) & 1)
+ /* Transition to thumb */
+ UCONTEXT_REG_CPSR (sigctx) |= (1 << 5);
+ else
+ /* Transition to ARM */
+ UCONTEXT_REG_CPSR (sigctx) &= ~(1 << 5);
#endif
+
+ return TRUE;
+#else
MonoContext mctx;
gboolean result;
-#if BROKEN_LINUX
- 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);*/
-#else
- mctx.eip = my_uc->sig_ctx.arm_pc;
- mctx.ebp = my_uc->sig_ctx.arm_sp;
- memcpy (&mctx.regs, &my_uc->sig_ctx.arm_r4, sizeof (gulong) * 8);
-#endif
+ mono_arch_sigctx_to_monoctx (ctx, &mctx);
- result = mono_handle_exception (&mctx, obj, (gpointer)mctx.eip, test_only);
+ result = mono_handle_exception (&mctx, obj);
/* restore the context so that returning from the signal handler will invoke
* the catch clause
*/
-#if BROKEN_LINUX
- 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);*/
-#else
- my_uc->sig_ctx.arm_pc = mctx.eip;
- my_uc->sig_ctx.arm_sp = mctx.ebp;
- memcpy (&my_uc->sig_ctx.arm_r4, &mctx.regs, sizeof (gulong) * 8);
-#endif
+ 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];
+#ifdef MONO_CROSS_COMPILE
+ g_assert_not_reached ();
+#elif defined(__native_client__)
+ g_assert_not_reached ();
#else
- my_ucontext *my_uc = sigctx;
- return (void*)my_uc->sig_ctx.arm_pc;
+ arm_ucontext *my_uc = sigctx;
+ return (void*) UCONTEXT_REG_PC (my_uc);
#endif
}
-gboolean
-mono_arch_has_unwind_info (gconstpointer addr)
+void
+mono_arch_setup_async_callback (MonoContext *ctx, void (*async_cb)(void *fun), gpointer user_data)
{
- return FALSE;
+ mgreg_t sp = (mgreg_t)MONO_CONTEXT_GET_SP (ctx);
+
+ // FIXME:
+ g_assert (!user_data);
+
+ /* Allocate a stack frame */
+ sp -= 16;
+ MONO_CONTEXT_SET_SP (ctx, sp);
+ MONO_CONTEXT_SET_IP (ctx, async_cb);
+
+ // FIXME: thumb/arm
}
+/*
+ * mono_arch_setup_resume_sighandler_ctx:
+ *
+ * Setup CTX so execution continues at FUNC.
+ */
+void
+mono_arch_setup_resume_sighandler_ctx (MonoContext *ctx, gpointer func)
+{
+ MONO_CONTEXT_SET_IP (ctx,func);
+ if ((mgreg_t)MONO_CONTEXT_GET_IP (ctx) & 1)
+ /* Transition to thumb */
+ ctx->cpsr |= (1 << 5);
+ else
+ /* Transition to ARM */
+ ctx->cpsr &= ~(1 << 5);
+}
projects / mono.git / blobdiff