X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=mono%2Fmini%2Ftramp-amd64.c;h=3c108f307cf0cd91a1141a645ff4eef6f9295454;hb=9852e7da8c00f2bcbf483211832563a63178101a;hp=fe113203de038492c05f30be5109727514ddc54b;hpb=49b8f80b4051c2de87d8ba4af47afaa5879fbc34;p=mono.git diff --git a/mono/mini/tramp-amd64.c b/mono/mini/tramp-amd64.c index fe113203de0..3c108f307cf 100644 --- a/mono/mini/tramp-amd64.c +++ b/mono/mini/tramp-amd64.c @@ -6,6 +6,8 @@ * Zoltan Varga (vargaz@gmail.com) * * (C) 2001 Ximian, Inc. + * Copyright 2003-2011 Novell, Inc (http://www.novell.com) + * Copyright 2011 Xamarin, Inc (http://www.xamarin.com) */ #include @@ -15,15 +17,21 @@ #include #include #include +#include +#include +#include #include -#ifdef HAVE_VALGRIND_MEMCHECK_H -#include -#endif +#include #include "mini.h" #include "mini-amd64.h" +#if defined(__native_client_codegen__) && defined(__native_client__) +#include +#include +#endif + #define IS_REX(inst) (((inst) >= 0x40) && ((inst) <= 0x4f)) static guint8* nullified_class_init_trampoline; @@ -45,11 +53,9 @@ mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr) MonoDomain *domain = mono_domain_get (); - this_reg = mono_arch_get_this_arg_reg (mono_method_signature (m), NULL); + this_reg = mono_arch_get_this_arg_reg (NULL); - mono_domain_lock (domain); - start = code = mono_code_manager_reserve (domain->code_mp, 20); - mono_domain_unlock (domain); + start = code = mono_domain_code_reserve (domain, 20); amd64_alu_reg_imm (code, X86_ADD, this_reg, sizeof (MonoObject)); /* FIXME: Optimize this */ @@ -57,6 +63,72 @@ mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr) amd64_jump_reg (code, AMD64_RAX); g_assert ((code - start) < 20); + nacl_domain_code_validate (domain, &start, 20, &code); + + mono_arch_flush_icache (start, code - start); + + return start; +} + +/* + * mono_arch_get_static_rgctx_trampoline: + * + * Create a trampoline which sets RGCTX_REG to MRGCTX, then jumps to ADDR. + */ +gpointer +mono_arch_get_static_rgctx_trampoline (MonoMethod *m, MonoMethodRuntimeGenericContext *mrgctx, gpointer addr) +{ + guint8 *code, *start; + int buf_len; + + MonoDomain *domain = mono_domain_get (); + +#ifdef MONO_ARCH_NOMAP32BIT + buf_len = 32; +#else + /* AOTed code could still have a non-32 bit address */ + if ((((guint64)addr) >> 32) == 0) + buf_len = 16; + else + buf_len = 30; +#endif + + start = code = mono_domain_code_reserve (domain, buf_len); + + amd64_mov_reg_imm (code, MONO_ARCH_RGCTX_REG, mrgctx); + amd64_jump_code (code, addr); + g_assert ((code - start) < buf_len); + + nacl_domain_code_validate (domain, &start, buf_len, &code); + mono_arch_flush_icache (start, code - start); + + return start; +} + +gpointer +mono_arch_get_llvm_imt_trampoline (MonoDomain *domain, MonoMethod *m, int vt_offset) +{ + guint8 *code, *start; + int buf_len; + int this_reg; + + buf_len = 32; + + start = code = mono_domain_code_reserve (domain, buf_len); + + this_reg = mono_arch_get_this_arg_reg (NULL); + + /* Set imt arg */ + amd64_mov_reg_imm (code, MONO_ARCH_IMT_REG, m); + /* Load vtable address */ + amd64_mov_reg_membase (code, AMD64_RAX, this_reg, 0, 8); + amd64_jump_membase (code, AMD64_RAX, vt_offset); + amd64_ret (code); + + g_assert ((code - start) < buf_len); + + nacl_domain_code_validate (domain, &start, buf_len, &code); + mono_arch_flush_icache (start, code - start); return start; @@ -71,18 +143,25 @@ mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr) void mono_arch_patch_callsite (guint8 *method_start, guint8 *orig_code, guint8 *addr) { +#if defined(__default_codegen__) guint8 *code; guint8 buf [16]; gboolean can_write = mono_breakpoint_clean_code (method_start, orig_code, 14, buf, sizeof (buf)); code = buf + 14; + /* mov 64-bit imm into r11 (followed by call reg?) or direct call*/ if (((code [-13] == 0x49) && (code [-12] == 0xbb)) || (code [-5] == 0xe8)) { if (code [-5] != 0xe8) { - if (can_write) + if (can_write) { InterlockedExchangePointer ((gpointer*)(orig_code - 11), addr); + VALGRIND_DISCARD_TRANSLATIONS (orig_code - 11, sizeof (gpointer)); + } } else { - if ((((guint64)(addr)) >> 32) != 0) { + gboolean disp_32bit = ((((gint64)addr - (gint64)orig_code)) < (1 << 30)) && ((((gint64)addr - (gint64)orig_code)) > -(1 << 30)); + + if ((((guint64)(addr)) >> 32) != 0 && !disp_32bit) { +#ifdef MONO_ARCH_NOMAP32BIT /* Print some diagnostics */ MonoJitInfo *ji = mono_jit_info_table_find (mono_domain_get (), (char*)orig_code); if (ji) @@ -92,26 +171,75 @@ mono_arch_patch_callsite (guint8 *method_start, guint8 *orig_code, guint8 *addr) if (ji) fprintf (stderr, "Callee: %s\n", mono_method_full_name (ji->method, TRUE)); g_assert_not_reached (); +#else + /* + * This might happen when calling AOTed code. Create a thunk. + */ + guint8 *thunk_start, *thunk_code; + + thunk_start = thunk_code = mono_domain_code_reserve (mono_domain_get (), 32); + amd64_jump_membase (thunk_code, AMD64_RIP, 0); + *(guint64*)thunk_code = (guint64)addr; + addr = thunk_start; + g_assert ((((guint64)(addr)) >> 32) == 0); + mono_arch_flush_icache (thunk_start, thunk_code - thunk_start); +#endif } - g_assert ((((guint64)(orig_code)) >> 32) == 0); - if (can_write) + if (can_write) { InterlockedExchange ((gint32*)(orig_code - 4), ((gint64)addr - (gint64)orig_code)); + VALGRIND_DISCARD_TRANSLATIONS (orig_code - 5, 4); + } } } else if ((code [-7] == 0x41) && (code [-6] == 0xff) && (code [-5] == 0x15)) { /* call *(%rip) */ gpointer *got_entry = (gpointer*)((guint8*)orig_code + (*(guint32*)(orig_code - 4))); - if (can_write) + if (can_write) { InterlockedExchangePointer (got_entry, addr); + VALGRIND_DISCARD_TRANSLATIONS (orig_code - 5, sizeof (gpointer)); + } + } +#elif defined(__native_client__) + /* These are essentially the same 2 cases as above, modified for NaCl*/ + + /* Target must be bundle-aligned */ + g_assert (((guint32)addr & kNaClAlignmentMask) == 0); + /* Return target must be bundle-aligned */ + g_assert (((guint32)orig_code & kNaClAlignmentMask) == 0); + + if (orig_code[-5] == 0xe8) { + /* Direct call */ + int ret; + gint32 offset = (gint32)addr - (gint32)orig_code; + guint8 buf[sizeof(gint32)]; + *((gint32*)(buf)) = offset; + ret = nacl_dyncode_modify (orig_code - sizeof(gint32), buf, sizeof(gint32)); + g_assert (ret == 0); + } + + else if (is_nacl_call_reg_sequence (orig_code - 10) && orig_code[-16] == 0x41 && orig_code[-15] == 0xbb) { + int ret; + guint8 buf[sizeof(gint32)]; + *((gint32 *)(buf)) = addr; + /* orig_code[-14] is the start of the immediate. */ + ret = nacl_dyncode_modify (orig_code - 14, buf, sizeof(gint32)); + g_assert (ret == 0); + } + else { + g_assert_not_reached (); } + + return; +#endif } void -mono_arch_patch_plt_entry (guint8 *code, guint8 *addr) +mono_arch_patch_plt_entry (guint8 *code, gpointer *got, mgreg_t *regs, guint8 *addr) { gint32 disp; gpointer *plt_jump_table_entry; +#if defined(__default_codegen__) /* A PLT entry: jmp *(%rip) */ g_assert (code [0] == 0xff); g_assert (code [1] == 0x25); @@ -119,210 +247,322 @@ mono_arch_patch_plt_entry (guint8 *code, guint8 *addr) disp = *(gint32*)(code + 2); plt_jump_table_entry = (gpointer*)(code + 6 + disp); +#elif defined(__native_client_codegen__) + /* A PLT entry: */ + /* mov (%rip), %r11d */ + /* nacljmp *%r11 */ + + /* Verify the 'mov' */ + g_assert (code [0] == 0x45); + g_assert (code [1] == 0x8b); + g_assert (code [2] == 0x1d); + + disp = *(gint32*)(code + 3); + + /* 7 = 3 (mov opcode) + 4 (disp) */ + /* This needs to resolve to the target of the RIP-relative offset */ + plt_jump_table_entry = (gpointer*)(code + 7 + disp); + +#endif /* __native_client_codegen__ */ + InterlockedExchangePointer (plt_jump_table_entry, addr); } +static gpointer +get_vcall_slot (guint8 *code, mgreg_t *regs, int *displacement) +{ + guint8 buf [10]; + gint32 disp; + MonoJitInfo *ji = NULL; + +#ifdef ENABLE_LLVM + /* code - 9 might be before the start of the method */ + /* FIXME: Avoid this expensive call somehow */ + ji = mono_jit_info_table_find (mono_domain_get (), (char*)code); +#endif + + mono_breakpoint_clean_code (ji ? ji->code_start : NULL, code, 9, buf, sizeof (buf)); + code = buf + 9; + + *displacement = 0; + + code -= 7; + + if ((code [0] == 0x41) && (code [1] == 0xff) && (code [2] == 0x15)) { + /* call OFFSET(%rip) */ + g_assert_not_reached (); + *displacement = *(guint32*)(code + 3); + return (gpointer*)(code + disp + 7); + } else { + g_assert_not_reached (); + return NULL; + } +} + +static gpointer* +get_vcall_slot_addr (guint8* code, mgreg_t *regs) +{ + gpointer vt; + int displacement; + vt = get_vcall_slot (code, regs, &displacement); + if (!vt) + return NULL; + return (gpointer*)((char*)vt + displacement); +} + void -mono_arch_nullify_class_init_trampoline (guint8 *code, gssize *regs) +mono_arch_nullify_class_init_trampoline (guint8 *code, mgreg_t *regs) { guint8 buf [16]; - gboolean can_write = mono_breakpoint_clean_code (NULL, code, 7, buf, sizeof (buf)); + MonoJitInfo *ji = NULL; + gboolean can_write; + + if (mono_use_llvm) { + /* code - 7 might be before the start of the method */ + /* FIXME: Avoid this expensive call somehow */ + ji = mono_jit_info_table_find (mono_domain_get (), (char*)code); + } + + can_write = mono_breakpoint_clean_code (ji ? ji->code_start : NULL, code, 7, buf, sizeof (buf)); if (!can_write) return; - code -= 3; - /* * A given byte sequence can match more than case here, so we have to be * really careful about the ordering of the cases. Longer sequences * come first. */ - if ((code [-4] == 0x41) && (code [-3] == 0xff) && (code [-2] == 0x15)) { + if ((buf [0] == 0x41) && (buf [1] == 0xff) && (buf [2] == 0x15)) { gpointer *vtable_slot; /* call *(%rip) */ - vtable_slot = mono_arch_get_vcall_slot_addr (code + 3, (gpointer*)regs); + vtable_slot = get_vcall_slot_addr (code, regs); g_assert (vtable_slot); *vtable_slot = nullified_class_init_trampoline; - } else if (code [-2] == 0xe8) { + } else if (buf [2] == 0xe8) { /* call */ - guint8 *buf = code - 2; - + //guint8 *buf = code - 2; + + /* + * It would be better to replace the call with nops, but that doesn't seem + * to work on SMP machines even when the whole call is inside a cache line. + * Patching the call address seems to work. + */ + /* buf [0] = 0x66; buf [1] = 0x66; buf [2] = 0x90; buf [3] = 0x66; buf [4] = 0x90; - } else if ((code [0] == 0x41) && (code [1] == 0xff)) { - /* call */ - /* happens on machines without MAP_32BIT like freebsd */ - /* amd64_set_reg_template is 10 bytes long */ - guint8* buf = code - 10; - - /* FIXME: Make this thread safe */ - /* Padding code suggested by the AMD64 Opt Manual */ - buf [0] = 0x66; - buf [1] = 0x66; - buf [2] = 0x66; - buf [3] = 0x90; - buf [4] = 0x66; - buf [5] = 0x66; - buf [6] = 0x66; - buf [7] = 0x90; - buf [8] = 0x66; - buf [9] = 0x66; - buf [10] = 0x90; - buf [11] = 0x66; - buf [12] = 0x90; - } else if (code [0] == 0x90 || code [0] == 0xeb || code [0] == 0x66) { + */ + + mono_arch_patch_callsite (code - 5, code, nullified_class_init_trampoline); + } else if ((buf [5] == 0xff) && x86_modrm_mod (buf [6]) == 3 && x86_modrm_reg (buf [6]) == 2) { + /* call * */ + /* Generated by the LLVM JIT or on platforms without MAP_32BIT set */ + mono_arch_patch_callsite (code - 13, code, nullified_class_init_trampoline); + } else if (buf [4] == 0x90 || buf [5] == 0xeb || buf [6] == 0x66) { /* Already changed by another thread */ ; } else { - printf ("Invalid trampoline sequence: %x %x %x %x %x %x %x\n", code [0], code [1], code [2], code [3], - code [4], code [5], code [6]); + printf ("Invalid trampoline sequence: %x %x %x %x %x %x %x\n", buf [0], buf [1], buf [2], buf [3], + buf [4], buf [5], buf [6]); g_assert_not_reached (); } } void -mono_arch_nullify_plt_entry (guint8 *code) +mono_arch_nullify_plt_entry (guint8 *code, mgreg_t *regs) +{ + if (mono_aot_only && !nullified_class_init_trampoline) + nullified_class_init_trampoline = mono_aot_get_trampoline ("nullified_class_init_trampoline"); + + mono_arch_patch_plt_entry (code, NULL, regs, nullified_class_init_trampoline); +} + +static void +stack_unaligned (MonoTrampolineType tramp_type) { - mono_arch_patch_plt_entry (code, nullified_class_init_trampoline); + printf ("%d\n", tramp_type); + g_assert_not_reached (); } guchar* -mono_arch_create_trampoline_code (MonoTrampolineType tramp_type) +mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot) { guint8 *buf, *code, *tramp, *br [2], *r11_save_code, *after_r11_save_code; - int i, lmf_offset, offset, res_offset, arg_offset, tramp_offset, saved_regs_offset; - int saved_fpregs_offset, rbp_offset, framesize, orig_rsp_to_rbp_offset; + int i, lmf_offset, offset, res_offset, arg_offset, rax_offset, tramp_offset, saved_regs_offset; + int saved_fpregs_offset, rbp_offset, framesize, orig_rsp_to_rbp_offset, cfa_offset; gboolean has_caller; + GSList *unwind_ops = NULL; + MonoJumpInfo *ji = NULL; + const guint kMaxCodeSize = NACL_SIZE (600, 600*2); + +#if defined(__native_client_codegen__) + const guint kNaClTrampOffset = 17; +#endif - if (tramp_type == MONO_TRAMPOLINE_JUMP) + if (tramp_type == MONO_TRAMPOLINE_JUMP || tramp_type == MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD) has_caller = FALSE; else has_caller = TRUE; - code = buf = mono_global_codeman_reserve (512); + code = buf = mono_global_codeman_reserve (kMaxCodeSize); - framesize = 512 + sizeof (MonoLMF); + framesize = kMaxCodeSize + sizeof (MonoLMF); framesize = (framesize + (MONO_ARCH_FRAME_ALIGNMENT - 1)) & ~ (MONO_ARCH_FRAME_ALIGNMENT - 1); - if (tramp_type == MONO_TRAMPOLINE_GENERIC_CLASS_INIT) { - static int byte_offset = -1; - static guint8 bitmask; - - guint8 *jump; - - if (byte_offset < 0) - mono_marshal_find_bitfield_offset (MonoVTable, initialized, &byte_offset, &bitmask); - - amd64_test_membase_imm_size (code, MONO_ARCH_VTABLE_REG, byte_offset, bitmask, 1); - jump = code; - amd64_branch8 (code, X86_CC_Z, -1, 1); - - amd64_ret (code); - - x86_patch (jump, code); - } - orig_rsp_to_rbp_offset = 0; r11_save_code = code; /* Reserve 5 bytes for the mov_membase_reg to save R11 */ code += 5; after_r11_save_code = code; - /* - * The generic class init trampoline is called directly by - * JITted code, there is no specific trampoline. The lazy - * fetch trampolines behave like generic class init - * trampolines. - */ - if (tramp_type != MONO_TRAMPOLINE_GENERIC_CLASS_INIT && - tramp_type != MONO_TRAMPOLINE_RGCTX_LAZY_FETCH) { - /* Pop the return address off the stack */ - amd64_pop_reg (code, AMD64_R11); - orig_rsp_to_rbp_offset += 8; - } + // CFA = sp + 16 (the trampoline address is on the stack) + cfa_offset = 16; + mono_add_unwind_op_def_cfa (unwind_ops, code, buf, AMD64_RSP, 16); + // IP saved at CFA - 8 + mono_add_unwind_op_offset (unwind_ops, code, buf, AMD64_RIP, -8); + + /* Pop the return address off the stack */ + amd64_pop_reg (code, AMD64_R11); + orig_rsp_to_rbp_offset += sizeof(mgreg_t); + + cfa_offset -= sizeof(mgreg_t); + mono_add_unwind_op_def_cfa_offset (unwind_ops, code, buf, cfa_offset); /* * Allocate a new stack frame */ amd64_push_reg (code, AMD64_RBP); - orig_rsp_to_rbp_offset -= 8; - amd64_mov_reg_reg (code, AMD64_RBP, AMD64_RSP, 8); + cfa_offset += sizeof(mgreg_t); + mono_add_unwind_op_def_cfa_offset (unwind_ops, code, buf, cfa_offset); + mono_add_unwind_op_offset (unwind_ops, code, buf, AMD64_RBP, - cfa_offset); + + orig_rsp_to_rbp_offset -= sizeof(mgreg_t); + amd64_mov_reg_reg (code, AMD64_RBP, AMD64_RSP, sizeof(mgreg_t)); + mono_add_unwind_op_def_cfa_reg (unwind_ops, code, buf, AMD64_RBP); amd64_alu_reg_imm (code, X86_SUB, AMD64_RSP, framesize); offset = 0; rbp_offset = - offset; - offset += 8; + offset += sizeof(mgreg_t); + rax_offset = - offset; + + offset += sizeof(mgreg_t); tramp_offset = - offset; - offset += 8; + offset += sizeof(gpointer); arg_offset = - offset; - if (tramp_type != MONO_TRAMPOLINE_GENERIC_CLASS_INIT && - tramp_type != MONO_TRAMPOLINE_RGCTX_LAZY_FETCH) { - /* Compute the trampoline address from the return address */ + /* Compute the trampoline address from the return address */ + if (aot) { +#if defined(__default_codegen__) + /* 7 = length of call *(rip) */ + amd64_alu_reg_imm (code, X86_SUB, AMD64_R11, 7); +#elif defined(__native_client_codegen__) + amd64_alu_reg_imm (code, X86_SUB, AMD64_R11, kNaClTrampOffset); +#endif + } else { /* 5 = length of amd64_call_membase () */ amd64_alu_reg_imm (code, X86_SUB, AMD64_R11, 5); - amd64_mov_membase_reg (code, AMD64_RBP, tramp_offset, AMD64_R11, 8); - } else { - amd64_mov_membase_imm (code, AMD64_RBP, tramp_offset, 0, 8); } + amd64_mov_membase_reg (code, AMD64_RBP, tramp_offset, AMD64_R11, sizeof(gpointer)); - offset += 8; + offset += sizeof(mgreg_t); res_offset = - offset; /* Save all registers */ - offset += AMD64_NREG * 8; + offset += AMD64_NREG * sizeof(mgreg_t); saved_regs_offset = - offset; for (i = 0; i < AMD64_NREG; ++i) { if (i == AMD64_RBP) { /* RAX is already saved */ - amd64_mov_reg_membase (code, AMD64_RAX, AMD64_RBP, rbp_offset, 8); - amd64_mov_membase_reg (code, AMD64_RBP, saved_regs_offset + (i * 8), AMD64_RAX, 8); + amd64_mov_reg_membase (code, AMD64_RAX, AMD64_RBP, rbp_offset, sizeof(mgreg_t)); + amd64_mov_membase_reg (code, AMD64_RBP, saved_regs_offset + (i * sizeof(mgreg_t)), AMD64_RAX, sizeof(mgreg_t)); } else if (i != AMD64_R11) { - amd64_mov_membase_reg (code, AMD64_RBP, saved_regs_offset + (i * 8), i, 8); + amd64_mov_membase_reg (code, AMD64_RBP, saved_regs_offset + (i * sizeof(mgreg_t)), i, sizeof(mgreg_t)); } else { - /* We have to save R11 right at the start of the trampoline code because it's used as a scratch register */ - amd64_mov_membase_reg (r11_save_code, AMD64_RSP, saved_regs_offset + orig_rsp_to_rbp_offset + (i * 8), i, 8); + amd64_mov_membase_reg (r11_save_code, AMD64_RSP, saved_regs_offset + orig_rsp_to_rbp_offset + (i * sizeof(mgreg_t)), i, sizeof(mgreg_t)); g_assert (r11_save_code == after_r11_save_code); } } - offset += 8 * 8; + offset += 8 * sizeof(mgreg_t); saved_fpregs_offset = - offset; for (i = 0; i < 8; ++i) - amd64_movsd_membase_reg (code, AMD64_RBP, saved_fpregs_offset + (i * 8), i); + amd64_movsd_membase_reg (code, AMD64_RBP, saved_fpregs_offset + (i * sizeof(mgreg_t)), i); + + /* Check that the stack is aligned */ +#if defined(__default_codegen__) + amd64_mov_reg_reg (code, AMD64_R11, AMD64_RSP, sizeof (mgreg_t)); + amd64_alu_reg_imm (code, X86_AND, AMD64_R11, 15); + amd64_alu_reg_imm (code, X86_CMP, AMD64_R11, 0); + br [0] = code; + amd64_branch_disp (code, X86_CC_Z, 0, FALSE); + if (aot) { + amd64_mov_reg_imm (code, AMD64_R11, 0); + amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, 0, 8); + } else { + amd64_mov_reg_imm (code, AMD64_RDI, tramp_type); + amd64_mov_reg_imm (code, AMD64_R11, stack_unaligned); + amd64_call_reg (code, AMD64_R11); + } + mono_amd64_patch (br [0], code); + //amd64_breakpoint (code); +#endif if (tramp_type != MONO_TRAMPOLINE_GENERIC_CLASS_INIT && - tramp_type != MONO_TRAMPOLINE_RGCTX_LAZY_FETCH) { + tramp_type != MONO_TRAMPOLINE_MONITOR_ENTER && + tramp_type != MONO_TRAMPOLINE_MONITOR_EXIT && + tramp_type != MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD) { /* Obtain the trampoline argument which is encoded in the instruction stream */ - amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, tramp_offset, 8); - amd64_mov_reg_membase (code, AMD64_RAX, AMD64_R11, 5, 1); - amd64_widen_reg (code, AMD64_RAX, AMD64_RAX, TRUE, FALSE); - amd64_alu_reg_imm_size (code, X86_CMP, AMD64_RAX, 4, 1); - br [0] = code; - x86_branch8 (code, X86_CC_NE, 6, FALSE); - /* 32 bit immediate */ - amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, 6, 4); - br [1] = code; - x86_jump8 (code, 10); - /* 64 bit immediate */ - mono_amd64_patch (br [0], code); - amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, 6, 8); - mono_amd64_patch (br [1], code); - amd64_mov_membase_reg (code, AMD64_RBP, arg_offset, AMD64_R11, 8); + if (aot) { + /* Load the GOT offset */ + amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, tramp_offset, sizeof(gpointer)); +#if defined(__default_codegen__) + amd64_mov_reg_membase (code, AMD64_RAX, AMD64_R11, 7, 4); +#elif defined(__native_client_codegen__) + /* The arg is hidden in a "push imm32" instruction, */ + /* add one to skip the opcode. */ + amd64_mov_reg_membase (code, AMD64_RAX, AMD64_R11, kNaClTrampOffset+1, 4); +#endif + /* Compute the address of the GOT slot */ + amd64_alu_reg_reg_size (code, X86_ADD, AMD64_R11, AMD64_RAX, sizeof(gpointer)); + /* Load the value */ + amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, 0, sizeof(gpointer)); + } else { + amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, tramp_offset, sizeof(gpointer)); +#if defined(__default_codegen__) + amd64_mov_reg_membase (code, AMD64_RAX, AMD64_R11, 5, 1); + amd64_widen_reg (code, AMD64_RAX, AMD64_RAX, TRUE, FALSE); + amd64_alu_reg_imm_size (code, X86_CMP, AMD64_RAX, 4, 1); + br [0] = code; + x86_branch8 (code, X86_CC_NE, 6, FALSE); + /* 32 bit immediate */ + amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, 6, 4); + br [1] = code; + x86_jump8 (code, 10); + /* 64 bit immediate */ + mono_amd64_patch (br [0], code); + amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, 6, 8); + mono_amd64_patch (br [1], code); +#elif defined(__native_client_codegen__) + /* All args are 32-bit pointers in NaCl */ + amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, 6, 4); +#endif + } + amd64_mov_membase_reg (code, AMD64_RBP, arg_offset, AMD64_R11, sizeof(gpointer)); } else { - amd64_mov_membase_reg (code, AMD64_RBP, arg_offset, MONO_ARCH_VTABLE_REG, 8); + amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, saved_regs_offset + (MONO_AMD64_ARG_REG1 * sizeof(mgreg_t)), sizeof(mgreg_t)); + amd64_mov_membase_reg (code, AMD64_RBP, arg_offset, AMD64_R11, sizeof(gpointer)); } /* Save LMF begin */ @@ -332,48 +572,52 @@ mono_arch_create_trampoline_code (MonoTrampolineType tramp_type) /* Save ip */ if (has_caller) - amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, 8, 8); + amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, 8, sizeof(gpointer)); else amd64_mov_reg_imm (code, AMD64_R11, 0); - amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, rip), AMD64_R11, 8); + amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, rip), AMD64_R11, sizeof(mgreg_t)); /* Save fp */ - amd64_mov_reg_membase (code, AMD64_R11, AMD64_RSP, framesize, 8); - amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, rbp), AMD64_R11, 8); + amd64_mov_reg_membase (code, AMD64_R11, AMD64_RSP, framesize, sizeof(mgreg_t)); + amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, rbp), AMD64_R11, sizeof(mgreg_t)); /* Save sp */ - amd64_mov_reg_reg (code, AMD64_R11, AMD64_RSP, 8); + amd64_mov_reg_reg (code, AMD64_R11, AMD64_RSP, sizeof(mgreg_t)); amd64_alu_reg_imm (code, X86_ADD, AMD64_R11, framesize + 16); - amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, rsp), AMD64_R11, 8); + amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, rsp), AMD64_R11, sizeof(mgreg_t)); /* Save method */ - if (tramp_type == MONO_TRAMPOLINE_GENERIC || tramp_type == MONO_TRAMPOLINE_JUMP) { - amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, arg_offset, 8); - amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, method), AMD64_R11, 8); + if (tramp_type == MONO_TRAMPOLINE_JIT || tramp_type == MONO_TRAMPOLINE_JUMP) { + amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, arg_offset, sizeof(gpointer)); + amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, method), AMD64_R11, sizeof(gpointer)); } else { - amd64_mov_membase_imm (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, method), 0, 8); + amd64_mov_membase_imm (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, method), 0, sizeof(gpointer)); } /* Save callee saved regs */ -#ifdef PLATFORM_WIN32 - amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, rdi), AMD64_RDI, 8); - amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, rsi), AMD64_RSI, 8); +#ifdef TARGET_WIN32 + amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, rdi), AMD64_RDI, sizeof(mgreg_t)); + amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, rsi), AMD64_RSI, sizeof(mgreg_t)); #endif - amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, rbx), AMD64_RBX, 8); - amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, r12), AMD64_R12, 8); - amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, r13), AMD64_R13, 8); - amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, r14), AMD64_R14, 8); - amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, r15), AMD64_R15, 8); - - amd64_mov_reg_imm (code, AMD64_R11, mono_get_lmf_addr); + amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, rbx), AMD64_RBX, sizeof(mgreg_t)); + amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, r12), AMD64_R12, sizeof(mgreg_t)); + amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, r13), AMD64_R13, sizeof(mgreg_t)); + amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, r14), AMD64_R14, sizeof(mgreg_t)); + amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, r15), AMD64_R15, sizeof(mgreg_t)); + + if (aot) { + code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_get_lmf_addr"); + } else { + amd64_mov_reg_imm (code, AMD64_R11, mono_get_lmf_addr); + } amd64_call_reg (code, AMD64_R11); /* Save lmf_addr */ - amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, lmf_addr), AMD64_RAX, 8); + amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, lmf_addr), AMD64_RAX, sizeof(gpointer)); /* Save previous_lmf */ /* Set the lowest bit to 1 to signal that this LMF has the ip field set */ - amd64_mov_reg_membase (code, AMD64_R11, AMD64_RAX, 0, 8); - amd64_alu_reg_imm_size (code, X86_ADD, AMD64_R11, 1, 8); - amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, previous_lmf), AMD64_R11, 8); + amd64_mov_reg_membase (code, AMD64_R11, AMD64_RAX, 0, sizeof(gpointer)); + amd64_alu_reg_imm_size (code, X86_ADD, AMD64_R11, 1, sizeof(gpointer)); + amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, previous_lmf), AMD64_R11, sizeof(gpointer)); /* Set new lmf */ amd64_lea_membase (code, AMD64_R11, AMD64_RBP, lmf_offset); - amd64_mov_membase_reg (code, AMD64_RAX, 0, AMD64_R11, 8); + amd64_mov_membase_reg (code, AMD64_RAX, 0, AMD64_R11, sizeof(gpointer)); /* Save LMF end */ @@ -382,65 +626,109 @@ mono_arch_create_trampoline_code (MonoTrampolineType tramp_type) /* Arg2 is the address of the calling code */ if (has_caller) - amd64_mov_reg_membase (code, AMD64_ARG_REG2, AMD64_RBP, 8, 8); + amd64_mov_reg_membase (code, AMD64_ARG_REG2, AMD64_RBP, 8, sizeof(gpointer)); else amd64_mov_reg_imm (code, AMD64_ARG_REG2, 0); /* Arg3 is the method/vtable ptr */ - amd64_mov_reg_membase (code, AMD64_ARG_REG3, AMD64_RBP, arg_offset, 8); + amd64_mov_reg_membase (code, AMD64_ARG_REG3, AMD64_RBP, arg_offset, sizeof(gpointer)); /* Arg4 is the trampoline address */ - amd64_mov_reg_membase (code, AMD64_ARG_REG4, AMD64_RBP, tramp_offset, 8); + amd64_mov_reg_membase (code, AMD64_ARG_REG4, AMD64_RBP, tramp_offset, sizeof(gpointer)); - tramp = (guint8*)mono_get_trampoline_func (tramp_type); - amd64_mov_reg_imm (code, AMD64_RAX, tramp); - amd64_call_reg (code, AMD64_RAX); + if (aot) { + char *icall_name = g_strdup_printf ("trampoline_func_%d", tramp_type); + code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, icall_name); + } else { + tramp = (guint8*)mono_get_trampoline_func (tramp_type); + amd64_mov_reg_imm (code, AMD64_R11, tramp); + } + amd64_call_reg (code, AMD64_R11); /* Check for thread interruption */ /* This is not perf critical code so no need to check the interrupt flag */ - amd64_mov_membase_reg (code, AMD64_RBP, res_offset, AMD64_RAX, 8); - amd64_mov_reg_imm (code, AMD64_RAX, (guint8*)mono_thread_interruption_checkpoint); - amd64_call_reg (code, AMD64_RAX); - amd64_mov_reg_membase (code, AMD64_RAX, AMD64_RBP, res_offset, 8); + /* + * Have to call the _force_ variant, since there could be a protected wrapper on the top of the stack. + */ + amd64_mov_membase_reg (code, AMD64_RBP, res_offset, AMD64_RAX, sizeof(mgreg_t)); + if (aot) { + code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_thread_force_interruption_checkpoint"); + } else { + amd64_mov_reg_imm (code, AMD64_R11, (guint8*)mono_thread_force_interruption_checkpoint); + } + amd64_call_reg (code, AMD64_R11); + + amd64_mov_reg_membase (code, AMD64_RAX, AMD64_RBP, res_offset, sizeof(mgreg_t)); /* Restore LMF */ - amd64_mov_reg_membase (code, AMD64_RCX, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, previous_lmf), 8); - amd64_alu_reg_imm_size (code, X86_SUB, AMD64_RCX, 1, 8); - amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, lmf_addr), 8); - amd64_mov_membase_reg (code, AMD64_R11, 0, AMD64_RCX, 8); + amd64_mov_reg_membase (code, AMD64_RCX, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, previous_lmf), sizeof(gpointer)); + amd64_alu_reg_imm_size (code, X86_SUB, AMD64_RCX, 1, sizeof(gpointer)); + amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, lmf_addr), sizeof(gpointer)); + amd64_mov_membase_reg (code, AMD64_R11, 0, AMD64_RCX, sizeof(gpointer)); + + /* + * Save rax to the stack, after the leave instruction, this will become part of + * the red zone. + */ + amd64_mov_membase_reg (code, AMD64_RBP, rax_offset, AMD64_RAX, sizeof(mgreg_t)); - /* Restore argument registers, r10 (needed to pass rgctx to - static shared generic methods) and r11 (imt register for - interface calls). */ + /* Restore argument registers, r10 (imt method/rgxtx) + and rax (needed for direct calls to C vararg functions). */ for (i = 0; i < AMD64_NREG; ++i) - if (AMD64_IS_ARGUMENT_REG (i) || i == AMD64_R10 || i == AMD64_R11) - amd64_mov_reg_membase (code, i, AMD64_RBP, saved_regs_offset + (i * 8), 8); + if (AMD64_IS_ARGUMENT_REG (i) || i == AMD64_R10 || i == AMD64_RAX) + amd64_mov_reg_membase (code, i, AMD64_RBP, saved_regs_offset + (i * sizeof(mgreg_t)), sizeof(mgreg_t)); for (i = 0; i < 8; ++i) - amd64_movsd_reg_membase (code, i, AMD64_RBP, saved_fpregs_offset + (i * 8)); + amd64_movsd_reg_membase (code, i, AMD64_RBP, saved_fpregs_offset + (i * sizeof(mgreg_t))); /* Restore stack */ amd64_leave (code); - if (tramp_type == MONO_TRAMPOLINE_CLASS_INIT || - tramp_type == MONO_TRAMPOLINE_GENERIC_CLASS_INIT || - tramp_type == MONO_TRAMPOLINE_RGCTX_LAZY_FETCH) + if (MONO_TRAMPOLINE_TYPE_MUST_RETURN (tramp_type)) { + /* Load result */ + amd64_mov_reg_membase (code, AMD64_RAX, AMD64_RSP, rax_offset - sizeof(mgreg_t), sizeof(mgreg_t)); amd64_ret (code); - else - /* call the compiled method */ - amd64_jump_reg (code, X86_EAX); + } else { + /* call the compiled method using the saved rax */ + amd64_jump_membase (code, AMD64_RSP, rax_offset - sizeof(mgreg_t)); + } - g_assert ((code - buf) <= 512); + g_assert ((code - buf) <= kMaxCodeSize); + + nacl_global_codeman_validate (&buf, kMaxCodeSize, &code); mono_arch_flush_icache (buf, code - buf); if (tramp_type == MONO_TRAMPOLINE_CLASS_INIT) { /* Initialize the nullified class init trampoline used in the AOT case */ - nullified_class_init_trampoline = code = mono_global_codeman_reserve (16); - x86_ret (code); + nullified_class_init_trampoline = mono_arch_get_nullified_class_init_trampoline (NULL); } + if (info) + *info = mono_tramp_info_create (mono_get_generic_trampoline_name (tramp_type), buf, code - buf, ji, unwind_ops); + + return buf; +} + +gpointer +mono_arch_get_nullified_class_init_trampoline (MonoTrampInfo **info) +{ + guint8 *code, *buf; + + code = buf = mono_global_codeman_reserve (16); + amd64_ret (code); + + nacl_global_codeman_validate(&buf, 16, &code); + + mono_arch_flush_icache (buf, code - buf); + + if (info) + *info = mono_tramp_info_create (g_strdup_printf ("nullified_class_init_trampoline"), buf, code - buf, NULL, NULL); + + if (mono_jit_map_is_enabled ()) + mono_emit_jit_tramp (buf, code - buf, "nullified_class_init_trampoline"); + return buf; } @@ -449,20 +737,43 @@ mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_ty { guint8 *code, *buf, *tramp; int size; + gboolean far_addr = FALSE; tramp = mono_get_trampoline_code (tramp_type); +#if defined(__default_codegen__) if ((((guint64)arg1) >> 32) == 0) size = 5 + 1 + 4; else size = 5 + 1 + 8; - mono_domain_lock (domain); - code = buf = mono_code_manager_reserve_align (domain->code_mp, size, 1); - mono_domain_unlock (domain); + code = buf = mono_domain_code_reserve_align (domain, size, 1); - amd64_call_code (code, tramp); + if (((gint64)tramp - (gint64)code) >> 31 != 0 && ((gint64)tramp - (gint64)code) >> 31 != -1) { +#ifndef MONO_ARCH_NOMAP32BIT + g_assert_not_reached (); +#endif + far_addr = TRUE; + size += 16; + code = buf = mono_domain_code_reserve_align (domain, size, 1); + } +#elif defined(__native_client_codegen__) + size = 5 + 1 + 4; + /* Aligning the call site below could */ + /* add up to kNaClAlignment-1 bytes */ + size += (kNaClAlignment-1); + buf = mono_domain_code_reserve_align (domain, size, kNaClAlignment); + code = buf; +#endif + + if (far_addr) { + amd64_mov_reg_imm (code, AMD64_R11, tramp); + amd64_call_reg (code, AMD64_R11); + } else { + amd64_call_code (code, tramp); + } /* The trampoline code will obtain the argument from the instruction stream */ +#if defined(__default_codegen__) if ((((guint64)arg1) >> 32) == 0) { *code = 0x4; *(guint32*)(code + 1) = (gint64)arg1; @@ -472,96 +783,414 @@ mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_ty *(guint64*)(code + 1) = (gint64)arg1; code += 9; } +#elif defined(__native_client_codegen__) + /* For NaCl, all tramp args are 32-bit because they're pointers */ + *code = 0x68; /* push imm32 */ + *(guint32*)(code + 1) = (gint32)arg1; + code += 5; +#endif g_assert ((code - buf) <= size); if (code_len) *code_len = size; + nacl_domain_code_validate(domain, &buf, size, &code); + mono_arch_flush_icache (buf, size); return buf; } gpointer -mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot) +mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info, gboolean aot) { - guint8 *tramp = mono_get_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH); + guint8 *tramp; guint8 *code, *buf; guint8 **rgctx_null_jumps; int tramp_size; int depth, index; int i; - - g_assert (tramp); - - index = slot; + gboolean mrgctx; + MonoJumpInfo *ji = NULL; + GSList *unwind_ops = NULL; + + mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot); + index = MONO_RGCTX_SLOT_INDEX (slot); + if (mrgctx) + index += MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT / sizeof (gpointer); for (depth = 0; ; ++depth) { - int size = mono_class_rgctx_get_array_size (depth); + int size = mono_class_rgctx_get_array_size (depth, mrgctx); if (index < size - 1) break; index -= size - 1; } - tramp_size = 32 + 8 * depth; + tramp_size = NACL_SIZE (64 + 8 * depth, 128 + 8 * depth); code = buf = mono_global_codeman_reserve (tramp_size); + unwind_ops = mono_arch_get_cie_program (); + rgctx_null_jumps = g_malloc (sizeof (guint8*) * (depth + 2)); - /* load rgctx ptr from vtable */ - amd64_mov_reg_membase (buf, AMD64_RAX, AMD64_ARG_REG1, G_STRUCT_OFFSET (MonoVTable, runtime_generic_context), 8); - /* is the rgctx ptr null? */ - amd64_test_reg_reg (buf, AMD64_RAX, AMD64_RAX); - /* if yes, jump to actual trampoline */ - rgctx_null_jumps [0] = buf; - amd64_branch8 (buf, X86_CC_Z, -1, 1); + if (mrgctx) { + /* get mrgctx ptr */ + amd64_mov_reg_reg (code, AMD64_RAX, AMD64_ARG_REG1, 8); + } else { + /* load rgctx ptr from vtable */ + amd64_mov_reg_membase (code, AMD64_RAX, AMD64_ARG_REG1, G_STRUCT_OFFSET (MonoVTable, runtime_generic_context), sizeof(gpointer)); + /* is the rgctx ptr null? */ + amd64_test_reg_reg (code, AMD64_RAX, AMD64_RAX); + /* if yes, jump to actual trampoline */ + rgctx_null_jumps [0] = code; + amd64_branch8 (code, X86_CC_Z, -1, 1); + } for (i = 0; i < depth; ++i) { /* load ptr to next array */ - amd64_mov_reg_membase (buf, AMD64_RAX, AMD64_RAX, 0, 8); + if (mrgctx && i == 0) + amd64_mov_reg_membase (code, AMD64_RAX, AMD64_RAX, MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT, sizeof(gpointer)); + else + amd64_mov_reg_membase (code, AMD64_RAX, AMD64_RAX, 0, sizeof(gpointer)); /* is the ptr null? */ - amd64_test_reg_reg (buf, AMD64_RAX, AMD64_RAX); + amd64_test_reg_reg (code, AMD64_RAX, AMD64_RAX); /* if yes, jump to actual trampoline */ - rgctx_null_jumps [i + 1] = buf; - amd64_branch8 (buf, X86_CC_Z, -1, 1); + rgctx_null_jumps [i + 1] = code; + amd64_branch8 (code, X86_CC_Z, -1, 1); } /* fetch slot */ - amd64_mov_reg_membase (buf, AMD64_RAX, AMD64_RAX, sizeof (gpointer) * (index + 1), 8); + amd64_mov_reg_membase (code, AMD64_RAX, AMD64_RAX, sizeof (gpointer) * (index + 1), sizeof(gpointer)); /* is the slot null? */ - amd64_test_reg_reg (buf, AMD64_RAX, AMD64_RAX); + amd64_test_reg_reg (code, AMD64_RAX, AMD64_RAX); /* if yes, jump to actual trampoline */ - rgctx_null_jumps [depth + 1] = buf; - amd64_branch8 (buf, X86_CC_Z, -1, 1); + rgctx_null_jumps [depth + 1] = code; + amd64_branch8 (code, X86_CC_Z, -1, 1); /* otherwise return */ - amd64_ret (buf); + amd64_ret (code); - for (i = 0; i <= depth + 1; ++i) - x86_patch (rgctx_null_jumps [i], buf); + for (i = mrgctx ? 1 : 0; i <= depth + 1; ++i) + mono_amd64_patch (rgctx_null_jumps [i], code); g_free (rgctx_null_jumps); /* move the rgctx pointer to the VTABLE register */ - amd64_mov_reg_reg (buf, MONO_ARCH_VTABLE_REG, AMD64_ARG_REG1, 8); - /* store the slot in RAX */ - amd64_mov_reg_imm (buf, AMD64_RAX, slot); + amd64_mov_reg_reg (code, MONO_ARCH_VTABLE_REG, AMD64_ARG_REG1, sizeof(gpointer)); + + if (aot) { + code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, g_strdup_printf ("specific_trampoline_lazy_fetch_%u", slot)); + amd64_jump_reg (code, AMD64_R11); + } else { + tramp = mono_arch_create_specific_trampoline (GUINT_TO_POINTER (slot), MONO_TRAMPOLINE_RGCTX_LAZY_FETCH, mono_get_root_domain (), NULL); + + /* jump to the actual trampoline */ + amd64_jump_code (code, tramp); + } + + nacl_global_codeman_validate (&buf, tramp_size, &code); + mono_arch_flush_icache (buf, code - buf); + + g_assert (code - buf <= tramp_size); + + if (info) + *info = mono_tramp_info_create (mono_get_rgctx_fetch_trampoline_name (slot), buf, code - buf, ji, unwind_ops); + + return buf; +} + +gpointer +mono_arch_create_generic_class_init_trampoline (MonoTrampInfo **info, gboolean aot) +{ + guint8 *tramp; + guint8 *code, *buf; + static int byte_offset = -1; + static guint8 bitmask; + guint8 *jump; + int tramp_size; + GSList *unwind_ops = NULL; + MonoJumpInfo *ji = NULL; + + tramp_size = 64; + + code = buf = mono_global_codeman_reserve (tramp_size); + + if (byte_offset < 0) + mono_marshal_find_bitfield_offset (MonoVTable, initialized, &byte_offset, &bitmask); + + amd64_test_membase_imm_size (code, MONO_AMD64_ARG_REG1, byte_offset, bitmask, 1); + jump = code; + amd64_branch8 (code, X86_CC_Z, -1, 1); + + amd64_ret (code); + + x86_patch (jump, code); + + if (aot) { + code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "specific_trampoline_generic_class_init"); + amd64_jump_reg (code, AMD64_R11); + } else { + tramp = mono_arch_create_specific_trampoline (NULL, MONO_TRAMPOLINE_GENERIC_CLASS_INIT, mono_get_root_domain (), NULL); + + /* jump to the actual trampoline */ + amd64_jump_code (code, tramp); + } + + nacl_global_codeman_validate (&buf, tramp_size, &code); + + mono_arch_flush_icache (buf, code - buf); + + g_assert (code - buf <= tramp_size); + + if (info) + *info = mono_tramp_info_create (g_strdup_printf ("generic_class_init_trampoline"), buf, code - buf, ji, unwind_ops); + + return buf; +} + +#ifdef MONO_ARCH_MONITOR_OBJECT_REG + +gpointer +mono_arch_create_monitor_enter_trampoline (MonoTrampInfo **info, gboolean aot) +{ + guint8 *tramp; + guint8 *code, *buf; + guint8 *jump_obj_null, *jump_sync_null, *jump_cmpxchg_failed, *jump_other_owner, *jump_tid, *jump_sync_thin_hash = NULL; + int tramp_size; + int owner_offset, nest_offset, dummy; + MonoJumpInfo *ji = NULL; + GSList *unwind_ops = NULL; + + g_assert (MONO_ARCH_MONITOR_OBJECT_REG == AMD64_RDI); + + mono_monitor_threads_sync_members_offset (&owner_offset, &nest_offset, &dummy); + g_assert (MONO_THREADS_SYNC_MEMBER_SIZE (owner_offset) == sizeof (gpointer)); + g_assert (MONO_THREADS_SYNC_MEMBER_SIZE (nest_offset) == sizeof (guint32)); + owner_offset = MONO_THREADS_SYNC_MEMBER_OFFSET (owner_offset); + nest_offset = MONO_THREADS_SYNC_MEMBER_OFFSET (nest_offset); + + tramp_size = 96; + + code = buf = mono_global_codeman_reserve (tramp_size); + + unwind_ops = mono_arch_get_cie_program (); + + if (mono_thread_get_tls_offset () != -1) { + /* MonoObject* obj is in RDI */ + /* is obj null? */ + amd64_test_reg_reg (code, AMD64_RDI, AMD64_RDI); + /* if yes, jump to actual trampoline */ + jump_obj_null = code; + amd64_branch8 (code, X86_CC_Z, -1, 1); + + /* load obj->synchronization to RCX */ + amd64_mov_reg_membase (code, AMD64_RCX, AMD64_RDI, G_STRUCT_OFFSET (MonoObject, synchronisation), 8); + + if (mono_gc_is_moving ()) { + /*if bit zero is set it's a thin hash*/ + /*FIXME use testb encoding*/ + amd64_test_reg_imm (code, AMD64_RCX, 0x01); + jump_sync_thin_hash = code; + amd64_branch8 (code, X86_CC_NE, -1, 1); + + /*clear bits used by the gc*/ + amd64_alu_reg_imm (code, X86_AND, AMD64_RCX, ~0x3); + } + + /* is synchronization null? */ + amd64_test_reg_reg (code, AMD64_RCX, AMD64_RCX); + /* if yes, jump to actual trampoline */ + jump_sync_null = code; + amd64_branch8 (code, X86_CC_Z, -1, 1); + + /* load MonoInternalThread* into RDX */ + code = mono_amd64_emit_tls_get (code, AMD64_RDX, mono_thread_get_tls_offset ()); + /* load TID into RDX */ + amd64_mov_reg_membase (code, AMD64_RDX, AMD64_RDX, G_STRUCT_OFFSET (MonoInternalThread, tid), 8); + + /* is synchronization->owner null? */ + amd64_alu_membase_imm_size (code, X86_CMP, AMD64_RCX, owner_offset, 0, 8); + /* if not, jump to next case */ + jump_tid = code; + amd64_branch8 (code, X86_CC_NZ, -1, 1); + + /* if yes, try a compare-exchange with the TID */ + /* zero RAX */ + amd64_alu_reg_reg (code, X86_XOR, AMD64_RAX, AMD64_RAX); + /* compare and exchange */ + amd64_prefix (code, X86_LOCK_PREFIX); + amd64_cmpxchg_membase_reg_size (code, AMD64_RCX, owner_offset, AMD64_RDX, 8); + /* if not successful, jump to actual trampoline */ + jump_cmpxchg_failed = code; + amd64_branch8 (code, X86_CC_NZ, -1, 1); + /* if successful, return */ + amd64_ret (code); + + /* next case: synchronization->owner is not null */ + x86_patch (jump_tid, code); + /* is synchronization->owner == TID? */ + amd64_alu_membase_reg_size (code, X86_CMP, AMD64_RCX, owner_offset, AMD64_RDX, 8); + /* if not, jump to actual trampoline */ + jump_other_owner = code; + amd64_branch8 (code, X86_CC_NZ, -1, 1); + /* if yes, increment nest */ + amd64_inc_membase_size (code, AMD64_RCX, nest_offset, 4); + /* return */ + amd64_ret (code); + + x86_patch (jump_obj_null, code); + if (jump_sync_thin_hash) + x86_patch (jump_sync_thin_hash, code); + x86_patch (jump_sync_null, code); + x86_patch (jump_cmpxchg_failed, code); + x86_patch (jump_other_owner, code); + } + /* jump to the actual trampoline */ - amd64_jump_code (buf, tramp); +#if MONO_AMD64_ARG_REG1 != AMD64_RDI + amd64_mov_reg_reg (code, MONO_AMD64_ARG_REG1, AMD64_RDI); +#endif + + if (aot) { + code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "specific_trampoline_monitor_enter"); + amd64_jump_reg (code, AMD64_R11); + } else { + tramp = mono_arch_create_specific_trampoline (NULL, MONO_TRAMPOLINE_MONITOR_ENTER, mono_get_root_domain (), NULL); - mono_arch_flush_icache (code, buf - code); + /* jump to the actual trampoline */ + amd64_jump_code (code, tramp); + } - g_assert (buf - code <= tramp_size); + nacl_global_codeman_validate (&buf, tramp_size, &code); - return code; + mono_arch_flush_icache (code, code - buf); + g_assert (code - buf <= tramp_size); + + if (info) + *info = mono_tramp_info_create (g_strdup_printf ("monitor_enter_trampoline"), buf, code - buf, ji, unwind_ops); + + return buf; } -guint32 -mono_arch_get_rgctx_lazy_fetch_offset (gpointer *regs) +gpointer +mono_arch_create_monitor_exit_trampoline (MonoTrampInfo **info, gboolean aot) { - return (guint32)(gulong)(regs [AMD64_RAX]); + guint8 *tramp; + guint8 *code, *buf; + guint8 *jump_obj_null, *jump_have_waiters, *jump_sync_null, *jump_not_owned, *jump_sync_thin_hash = NULL; + guint8 *jump_next; + int tramp_size; + int owner_offset, nest_offset, entry_count_offset; + MonoJumpInfo *ji = NULL; + GSList *unwind_ops = NULL; + + g_assert (MONO_ARCH_MONITOR_OBJECT_REG == AMD64_RDI); + + mono_monitor_threads_sync_members_offset (&owner_offset, &nest_offset, &entry_count_offset); + g_assert (MONO_THREADS_SYNC_MEMBER_SIZE (owner_offset) == sizeof (gpointer)); + g_assert (MONO_THREADS_SYNC_MEMBER_SIZE (nest_offset) == sizeof (guint32)); + g_assert (MONO_THREADS_SYNC_MEMBER_SIZE (entry_count_offset) == sizeof (gint32)); + owner_offset = MONO_THREADS_SYNC_MEMBER_OFFSET (owner_offset); + nest_offset = MONO_THREADS_SYNC_MEMBER_OFFSET (nest_offset); + entry_count_offset = MONO_THREADS_SYNC_MEMBER_OFFSET (entry_count_offset); + + tramp_size = 112; + + code = buf = mono_global_codeman_reserve (tramp_size); + + unwind_ops = mono_arch_get_cie_program (); + + if (mono_thread_get_tls_offset () != -1) { + /* MonoObject* obj is in RDI */ + /* is obj null? */ + amd64_test_reg_reg (code, AMD64_RDI, AMD64_RDI); + /* if yes, jump to actual trampoline */ + jump_obj_null = code; + amd64_branch8 (code, X86_CC_Z, -1, 1); + + /* load obj->synchronization to RCX */ + amd64_mov_reg_membase (code, AMD64_RCX, AMD64_RDI, G_STRUCT_OFFSET (MonoObject, synchronisation), 8); + + if (mono_gc_is_moving ()) { + /*if bit zero is set it's a thin hash*/ + /*FIXME use testb encoding*/ + amd64_test_reg_imm (code, AMD64_RCX, 0x01); + jump_sync_thin_hash = code; + amd64_branch8 (code, X86_CC_NE, -1, 1); + + /*clear bits used by the gc*/ + amd64_alu_reg_imm (code, X86_AND, AMD64_RCX, ~0x3); + } + + /* is synchronization null? */ + amd64_test_reg_reg (code, AMD64_RCX, AMD64_RCX); + /* if yes, jump to actual trampoline */ + jump_sync_null = code; + amd64_branch8 (code, X86_CC_Z, -1, 1); + + /* next case: synchronization is not null */ + /* load MonoInternalThread* into RDX */ + code = mono_amd64_emit_tls_get (code, AMD64_RDX, mono_thread_get_tls_offset ()); + /* load TID into RDX */ + amd64_mov_reg_membase (code, AMD64_RDX, AMD64_RDX, G_STRUCT_OFFSET (MonoInternalThread, tid), 8); + /* is synchronization->owner == TID */ + amd64_alu_membase_reg_size (code, X86_CMP, AMD64_RCX, owner_offset, AMD64_RDX, 8); + /* if no, jump to actual trampoline */ + jump_not_owned = code; + amd64_branch8 (code, X86_CC_NZ, -1, 1); + + /* next case: synchronization->owner == TID */ + /* is synchronization->nest == 1 */ + amd64_alu_membase_imm_size (code, X86_CMP, AMD64_RCX, nest_offset, 1, 4); + /* if not, jump to next case */ + jump_next = code; + amd64_branch8 (code, X86_CC_NZ, -1, 1); + /* if yes, is synchronization->entry_count zero? */ + amd64_alu_membase_imm_size (code, X86_CMP, AMD64_RCX, entry_count_offset, 0, 4); + /* if not, jump to actual trampoline */ + jump_have_waiters = code; + amd64_branch8 (code, X86_CC_NZ, -1 , 1); + /* if yes, set synchronization->owner to null and return */ + amd64_mov_membase_imm (code, AMD64_RCX, owner_offset, 0, 8); + amd64_ret (code); + + /* next case: synchronization->nest is not 1 */ + x86_patch (jump_next, code); + /* decrease synchronization->nest and return */ + amd64_dec_membase_size (code, AMD64_RCX, nest_offset, 4); + amd64_ret (code); + + x86_patch (jump_obj_null, code); + x86_patch (jump_have_waiters, code); + x86_patch (jump_not_owned, code); + x86_patch (jump_sync_null, code); + } + + /* jump to the actual trampoline */ +#if MONO_AMD64_ARG_REG1 != AMD64_RDI + amd64_mov_reg_reg (code, MONO_AMD64_ARG_REG1, AMD64_RDI); +#endif + + if (aot) { + code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "specific_trampoline_monitor_exit"); + amd64_jump_reg (code, AMD64_R11); + } else { + tramp = mono_arch_create_specific_trampoline (NULL, MONO_TRAMPOLINE_MONITOR_EXIT, mono_get_root_domain (), NULL); + amd64_jump_code (code, tramp); + } + + nacl_global_codeman_validate (&buf, tramp_size, &code); + + mono_arch_flush_icache (code, code - buf); + g_assert (code - buf <= tramp_size); + + if (info) + *info = mono_tramp_info_create (g_strdup_printf ("monitor_exit_trampoline"), buf, code - buf, ji, unwind_ops); + + return buf; } +#endif void mono_arch_invalidate_method (MonoJitInfo *ji, void *func, gpointer func_arg) @@ -575,3 +1204,81 @@ mono_arch_invalidate_method (MonoJitInfo *ji, void *func, gpointer func_arg) x86_push_imm (code, (guint64)func_arg); amd64_call_reg (code, AMD64_R11); } + + +static void +handler_block_trampoline_helper (gpointer *ptr) +{ + MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id); + *ptr = jit_tls->handler_block_return_address; +} + +gpointer +mono_arch_create_handler_block_trampoline (void) +{ + guint8 *tramp = mono_get_trampoline_code (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD); + guint8 *code, *buf; + int tramp_size = 64; + code = buf = mono_global_codeman_reserve (tramp_size); + + /* + This trampoline restore the call chain of the handler block then jumps into the code that deals with it. + */ + + if (mono_get_jit_tls_offset () != -1) { + code = mono_amd64_emit_tls_get (code, AMD64_RDI, mono_get_jit_tls_offset ()); + amd64_mov_reg_membase (code, AMD64_RDI, AMD64_RDI, G_STRUCT_OFFSET (MonoJitTlsData, handler_block_return_address), 8); + /* Simulate a call */ + amd64_push_reg (code, AMD64_RAX); + amd64_jump_code (code, tramp); + } else { + /*Slow path uses a c helper*/ + amd64_mov_reg_reg (code, AMD64_RDI, AMD64_RSP, 8); + amd64_mov_reg_imm (code, AMD64_RAX, tramp); + amd64_push_reg (code, AMD64_RAX); + amd64_jump_code (code, handler_block_trampoline_helper); + } + + mono_arch_flush_icache (buf, code - buf); + g_assert (code - buf <= tramp_size); + + if (mono_jit_map_is_enabled ()) + mono_emit_jit_tramp (buf, code - buf, "handler_block_trampoline"); + + return buf; +} + +/* + * mono_arch_get_call_target: + * + * Return the address called by the code before CODE if exists. + */ +guint8* +mono_arch_get_call_target (guint8 *code) +{ + if (code [-5] == 0xe8) { + guint32 disp = *(guint32*)(code - 4); + guint8 *target = code + disp; + + return target; + } else { + return NULL; + } +} + +/* + * mono_arch_get_plt_info_offset: + * + * Return the PLT info offset belonging to the plt entry PLT_ENTRY. + */ +guint32 +mono_arch_get_plt_info_offset (guint8 *plt_entry, mgreg_t *regs, guint8 *code) +{ +#if defined(__native_client__) || defined(__native_client_codegen__) + /* 18 = 3 (mov opcode) + 4 (disp) + 10 (nacljmp) + 1 (push opcode) */ + /* See aot-compiler.c arch_emit_plt_entry for details. */ + return *(guint32*)(plt_entry + 18); +#else + return *(guint32*)(plt_entry + 6); +#endif +}