void
mono_amd64_throw_exception (guint64 dummy1, guint64 dummy2, guint64 dummy3, guint64 dummy4,
guint64 dummy5, guint64 dummy6,
- MonoObject *exc, guint64 rip, guint64 rsp,
- guint64 rbx, guint64 rbp, guint64 r12, guint64 r13,
- guint64 r14, guint64 r15, guint64 rdi, guint64 rsi,
- guint64 rax, guint64 rcx, guint64 rdx,
- guint64 rethrow)
+ mgreg_t *regs, mgreg_t rip,
+ MonoObject *exc, gboolean rethrow)
{
static void (*restore_context) (MonoContext *);
MonoContext ctx;
if (!restore_context)
restore_context = mono_get_restore_context ();
- ctx.rsp = rsp;
+ ctx.rsp = regs [AMD64_RSP];
ctx.rip = rip;
- ctx.rbx = rbx;
- ctx.rbp = rbp;
- ctx.r12 = r12;
- ctx.r13 = r13;
- ctx.r14 = r14;
- ctx.r15 = r15;
- ctx.rdi = rdi;
- ctx.rsi = rsi;
- ctx.rax = rax;
- ctx.rcx = rcx;
- ctx.rdx = rdx;
+ ctx.rbx = regs [AMD64_RBX];
+ ctx.rbp = regs [AMD64_RBP];
+ ctx.r12 = regs [AMD64_R12];
+ ctx.r13 = regs [AMD64_R13];
+ ctx.r14 = regs [AMD64_R14];
+ ctx.r15 = regs [AMD64_R15];
+ ctx.rdi = regs [AMD64_RDI];
+ ctx.rsi = regs [AMD64_RSI];
+ ctx.rax = regs [AMD64_RAX];
+ ctx.rcx = regs [AMD64_RCX];
+ ctx.rdx = regs [AMD64_RDX];
if (mono_object_isinst (exc, mono_defaults.exception_class)) {
MonoException *mono_ex = (MonoException*)exc;
void
mono_amd64_throw_corlib_exception (guint64 dummy1, guint64 dummy2, guint64 dummy3, guint64 dummy4,
- guint64 dummy5, guint64 dummy6,
- guint32 ex_token_index,
- guint64 rip, guint64 rsp,
- guint64 rbx, guint64 rbp, guint64 r12, guint64 r13,
- guint64 r14, guint64 r15, guint64 rdi, guint64 rsi,
- guint64 rax, guint64 rcx, guint64 rdx,
- gint32 pc_offset)
+ guint64 dummy5, guint64 dummy6,
+ mgreg_t *regs, mgreg_t rip,
+ guint32 ex_token_index, gint64 pc_offset)
{
guint32 ex_token = MONO_TOKEN_TYPE_DEF | ex_token_index;
MonoException *ex;
rip -= pc_offset;
- mono_amd64_throw_exception (dummy1, dummy2, dummy3, dummy4, dummy5, dummy6, (MonoObject*)ex, rip, rsp, rbx, rbp, r12, r13, r14, r15, rdi, rsi, rax, rcx, rdx, FALSE);
+ /* Negate the ip adjustment done in mono_amd64_throw_exception () */
+ rip += 1;
+
+ mono_amd64_throw_exception (dummy1, dummy2, dummy3, dummy4, dummy5, dummy6, regs, rip, (MonoObject*)ex, FALSE);
+}
+
+static void
+mono_amd64_resume_unwind (guint64 dummy1, guint64 dummy2, guint64 dummy3, guint64 dummy4,
+ guint64 dummy5, guint64 dummy6,
+ mgreg_t *regs, mgreg_t rip,
+ guint32 dummy7, gint64 dummy8)
+{
+ /* Only the register parameters are valid */
+ MonoContext ctx;
+
+ ctx.rsp = regs [AMD64_RSP];
+ ctx.rip = rip;
+ ctx.rbx = regs [AMD64_RBX];
+ ctx.rbp = regs [AMD64_RBP];
+ ctx.r12 = regs [AMD64_R12];
+ ctx.r13 = regs [AMD64_R13];
+ ctx.r14 = regs [AMD64_R14];
+ ctx.r15 = regs [AMD64_R15];
+ ctx.rdi = regs [AMD64_RDI];
+ ctx.rsi = regs [AMD64_RSI];
+ ctx.rax = regs [AMD64_RAX];
+ ctx.rcx = regs [AMD64_RCX];
+ ctx.rdx = regs [AMD64_RDX];
+
+ mono_resume_unwind (&ctx);
}
/*
* mono_amd64_throw_corlib_exception.
*/
static gpointer
-get_throw_trampoline (MonoTrampInfo **info, gboolean rethrow, gboolean corlib, gboolean aot)
+get_throw_trampoline (MonoTrampInfo **info, gboolean rethrow, gboolean corlib, gboolean llvm_abs, gboolean resume_unwind, const char *tramp_name, gboolean aot)
{
guint8* start;
guint8 *code;
MonoJumpInfo *ji = NULL;
GSList *unwind_ops = NULL;
+ int i, buf_size, stack_size, arg_offsets [16], regs_offset;
- start = code = mono_global_codeman_reserve (64);
+ buf_size = 256;
+ start = code = mono_global_codeman_reserve (buf_size);
- code = start;
+ /* The stack is unaligned on entry */
+ stack_size = 192 + 8;
- unwind_ops = mono_arch_get_cie_program ();
+ code = start;
- amd64_mov_reg_reg (code, AMD64_R11, AMD64_RSP, 8);
+ if (info)
+ unwind_ops = mono_arch_get_cie_program ();
- /* reverse order */
- if (corlib)
- amd64_push_reg (code, AMD64_ARG_REG2);
- else
- amd64_push_imm (code, rethrow);
- amd64_push_reg (code, AMD64_RDX);
- amd64_push_reg (code, AMD64_RCX);
- amd64_push_reg (code, AMD64_RAX);
- amd64_push_reg (code, AMD64_RSI);
- amd64_push_reg (code, AMD64_RDI);
- amd64_push_reg (code, AMD64_R15);
- amd64_push_reg (code, AMD64_R14);
- amd64_push_reg (code, AMD64_R13);
- amd64_push_reg (code, AMD64_R12);
- amd64_push_reg (code, AMD64_RBP);
- amd64_push_reg (code, AMD64_RBX);
+ /* Alloc frame */
+ amd64_alu_reg_imm (code, X86_SUB, AMD64_RSP, stack_size);
+ if (info)
+ mono_add_unwind_op_def_cfa_offset (unwind_ops, code, start, stack_size + 8);
- /* SP */
- amd64_lea_membase (code, AMD64_RAX, AMD64_R11, 8);
- amd64_push_reg (code, AMD64_RAX);
+ /*
+ * To hide linux/windows calling convention differences, we pass all arguments on
+ * the stack by passing 6 dummy values in registers.
+ */
- /* IP */
- amd64_push_membase (code, AMD64_R11, 0);
+ arg_offsets [0] = 0;
+ arg_offsets [1] = sizeof (gpointer);
+ arg_offsets [2] = sizeof (gpointer) * 2;
+ arg_offsets [3] = sizeof (gpointer) * 3;
+ regs_offset = sizeof (gpointer) * 4;
- if (corlib)
- /* exc type token */
- amd64_push_reg (code, AMD64_ARG_REG1);
+ /* Save registers */
+ for (i = 0; i < AMD64_NREG; ++i)
+ if (i != AMD64_RSP)
+ amd64_mov_membase_reg (code, AMD64_RSP, regs_offset + (i * sizeof (gpointer)), i, 8);
+ /* Save RSP */
+ amd64_lea_membase (code, AMD64_RAX, AMD64_RSP, stack_size + sizeof (gpointer));
+ amd64_mov_membase_reg (code, AMD64_RSP, regs_offset + (AMD64_RSP * sizeof (gpointer)), X86_EAX, 8);
+ /* Set arg1 == regs */
+ amd64_lea_membase (code, AMD64_RAX, AMD64_RSP, regs_offset);
+ amd64_mov_membase_reg (code, AMD64_RSP, arg_offsets [0], AMD64_RAX, 8);
+ /* Set arg2 == eip */
+ if (llvm_abs)
+ amd64_alu_reg_reg (code, X86_XOR, AMD64_RAX, AMD64_RAX);
else
- /* Exception */
- amd64_push_reg (code, AMD64_ARG_REG1);
-
- mono_add_unwind_op_def_cfa_offset (unwind_ops, code, start, (15 + 1) * sizeof (gpointer));
-
-#ifdef TARGET_WIN32
- /* align stack */
- amd64_push_imm (code, 0);
- amd64_push_imm (code, 0);
- amd64_push_imm (code, 0);
- amd64_push_imm (code, 0);
- amd64_push_imm (code, 0);
- amd64_push_imm (code, 0);
-#endif
+ amd64_mov_reg_membase (code, AMD64_RAX, AMD64_RSP, stack_size, 8);
+ amd64_mov_membase_reg (code, AMD64_RSP, arg_offsets [1], AMD64_RAX, 8);
+ /* Set arg3 == exc/ex_token_index */
+ if (resume_unwind)
+ amd64_mov_membase_imm (code, AMD64_RSP, arg_offsets [2], 0, 8);
+ else
+ amd64_mov_membase_reg (code, AMD64_RSP, arg_offsets [2], AMD64_ARG_REG1, 8);
+ /* Set arg4 == rethrow/pc offset */
+ if (resume_unwind) {
+ amd64_mov_membase_imm (code, AMD64_RSP, arg_offsets [3], 0, 8);
+ } else if (corlib) {
+ amd64_mov_membase_reg (code, AMD64_RSP, arg_offsets [3], AMD64_ARG_REG2, 8);
+ if (llvm_abs)
+ /*
+ * The caller is LLVM code which passes the absolute address not a pc offset,
+ * so compensate by passing 0 as 'rip' and passing the negated abs address as
+ * the pc offset.
+ */
+ amd64_neg_membase (code, AMD64_RSP, arg_offsets [3]);
+ } else {
+ amd64_mov_membase_imm (code, AMD64_RSP, arg_offsets [3], rethrow, 8);
+ }
if (aot) {
- ji = mono_patch_info_list_prepend (ji, code - start, MONO_PATCH_INFO_JIT_ICALL_ADDR, corlib ? "mono_amd64_throw_corlib_exception" : "mono_amd64_throw_exception");
+ ji = mono_patch_info_list_prepend (ji, code - start, MONO_PATCH_INFO_JIT_ICALL_ADDR, corlib ? (llvm_abs ? "mono_amd64_throw_corlib_exception_abs" : "mono_amd64_throw_corlib_exception") : "mono_amd64_throw_exception");
amd64_mov_reg_membase (code, AMD64_R11, AMD64_RIP, 0, 8);
} else {
- amd64_mov_reg_imm (code, AMD64_R11, corlib ? (gpointer)mono_amd64_throw_corlib_exception : (gpointer)mono_amd64_throw_exception);
+ amd64_mov_reg_imm (code, AMD64_R11, resume_unwind ? (mono_amd64_resume_unwind) : (corlib ? (gpointer)mono_amd64_throw_corlib_exception : (gpointer)mono_amd64_throw_exception));
}
amd64_call_reg (code, AMD64_R11);
amd64_breakpoint (code);
mono_arch_flush_icache (start, code - start);
- g_assert ((code - start) < 64);
-
- mono_save_trampoline_xdebug_info ("throw_exception_trampoline", start, code - start, unwind_ops);
+ g_assert ((code - start) < buf_size);
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);
+ *info = mono_tramp_info_create (g_strdup (tramp_name), start, code - start, ji, unwind_ops);
return start;
}
gpointer
mono_arch_get_throw_exception (MonoTrampInfo **info, gboolean aot)
{
- return get_throw_trampoline (info, FALSE, FALSE, aot);
+ return get_throw_trampoline (info, FALSE, FALSE, FALSE, FALSE, "throw_exception", aot);
}
gpointer
mono_arch_get_rethrow_exception (MonoTrampInfo **info, gboolean aot)
{
- return get_throw_trampoline (info, TRUE, FALSE, aot);
+ return get_throw_trampoline (info, TRUE, FALSE, FALSE, FALSE, "rethrow_exception", aot);
}
/**
gpointer
mono_arch_get_throw_corlib_exception (MonoTrampInfo **info, gboolean aot)
{
- return get_throw_trampoline (info, FALSE, TRUE, aot);
+ return get_throw_trampoline (info, FALSE, TRUE, FALSE, FALSE, "throw_corlib_exception", aot);
}
/*
- * mono_arch_find_jit_info_ext:
+ * mono_arch_find_jit_info:
*
* This function is used to gather information from @ctx, and store it in @frame_info.
* It unwinds one stack frame, and stores the resulting context into @new_ctx. @lmf
* is modified if needed.
* Returns TRUE on success, FALSE otherwise.
- * This function is a version of mono_arch_find_jit_info () where all the results are
- * returned in a StackFrameInfo structure.
*/
gboolean
-mono_arch_find_jit_info_ext (MonoDomain *domain, MonoJitTlsData *jit_tls,
+mono_arch_find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls,
MonoJitInfo *ji, MonoContext *ctx,
MonoContext *new_ctx, MonoLMF **lmf,
StackFrameInfo *frame)
gboolean
mono_arch_handle_exception (void *sigctx, gpointer obj, gboolean test_only)
{
-#if defined(MONO_ARCH_USE_SIGACTION) && defined(UCONTEXT_GREGS)
+#if defined(MONO_ARCH_USE_SIGACTION)
+ ucontext_t *ctx = (ucontext_t*)sigctx;
+
/*
* 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_RSP (sigctx);
+ guint64 sp = UCONTEXT_REG_RSP (ctx);
/* Pass the ctx parameter in TLS */
- mono_arch_sigctx_to_monoctx (sigctx, &jit_tls->ex_ctx);
+ mono_arch_sigctx_to_monoctx (ctx, &jit_tls->ex_ctx);
/* The others in registers */
- UCONTEXT_REG_RDI (sigctx) = (guint64)obj;
- UCONTEXT_REG_RSI (sigctx) = test_only;
+ UCONTEXT_REG_RDI (ctx) = (guint64)obj;
+ UCONTEXT_REG_RSI (ctx) = test_only;
/* Allocate a stack frame below the red zone */
sp -= 128;
/* The stack should be unaligned */
if (sp % 8 == 0)
sp -= 8;
- UCONTEXT_REG_RSP (sigctx) = sp;
+ UCONTEXT_REG_RSP (ctx) = sp;
- UCONTEXT_REG_RIP (sigctx) = (guint64)handle_signal_exception;
+ UCONTEXT_REG_RIP (ctx) = (guint64)handle_signal_exception;
return TRUE;
#else
void
mono_arch_exceptions_init (void)
{
+ guint8 *tramp;
+
if (mono_aot_only) {
throw_pending_exception = mono_aot_get_trampoline ("throw_pending_exception");
} else {
/* Call this to avoid initialization races */
throw_pending_exception = mono_arch_get_throw_pending_exception (NULL, FALSE);
+
+ /* LLVM needs different throw trampolines */
+ tramp = get_throw_trampoline (NULL, FALSE, TRUE, FALSE, FALSE, "llvm_throw_corlib_exception_trampoline", FALSE);
+ mono_register_jit_icall (tramp, "llvm_throw_corlib_exception_trampoline", NULL, TRUE);
+
+ tramp = get_throw_trampoline (NULL, FALSE, TRUE, TRUE, FALSE, "llvm_throw_corlib_exception_abs_trampoline", FALSE);
+ mono_register_jit_icall (tramp, "llvm_throw_corlib_exception_abs_trampoline", NULL, TRUE);
+
+ tramp = get_throw_trampoline (NULL, FALSE, TRUE, TRUE, TRUE, "llvm_resume_unwind_trampoline", FALSE);
+ mono_register_jit_icall (tramp, "llvm_resume_unwind_trampoline", NULL, TRUE);
}
}
projects / mono.git / blobdiff