1 /* AMD64 calling conventions checking. 2 3 Copyright 2000, 2001, 2004, 2007 Free Software Foundation, Inc. 4 5 This file is part of the GNU MP Library. 6 7 The GNU MP Library is free software; you can redistribute it and/or modify 8 it under the terms of the GNU Lesser General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or (at your 10 option) any later version. 11 12 The GNU MP Library is distributed in the hope that it will be useful, but 13 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 15 License for more details. 16 17 You should have received a copy of the GNU Lesser General Public License 18 along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */ 19 20 #include <stdio.h> 21 #include "gmp.h" 22 #include "gmp-impl.h" 23 #include "tests.h" 24 25 26 /* Vector if constants and register values. We use one vector to allow access 27 via a base pointer, very beneficial for the PIC-enabled amd64call.asm. */ 28 mp_limb_t calling_conventions_values[23] = 29 { 30 CNST_LIMB(0x1234567887654321), /* want_rbx */ 31 CNST_LIMB(0x89ABCDEFFEDCBA98), /* want_rbp */ 32 CNST_LIMB(0xDEADBEEFBADECAFE), /* want_r12 */ 33 CNST_LIMB(0xFFEEDDCCBBAA9988), /* want_r13 */ 34 CNST_LIMB(0x0011223344556677), /* want_r14 */ 35 CNST_LIMB(0x1234432156788765), /* want_r15 */ 36 37 CNST_LIMB(0xFEEDABBACAAFBEED), /* JUNK_RAX */ 38 CNST_LIMB(0xAB78DE89FF5125BB), /* JUNK_R10 */ 39 CNST_LIMB(0x1238901890189031) /* JUNK_R11 */ 40 41 /* rest of array used for dynamic values. */ 42 }; 43 44 /* Index starts for various regions in above vector. */ 45 #define WANT 0 46 #define JUNK 6 47 #define SAVE 9 48 #define RETADDR 15 49 #define VAL 16 50 #define RFLAGS 22 51 52 /* values to check */ 53 struct { 54 int control; 55 int status; 56 int tag; 57 int other[4]; 58 } calling_conventions_fenv; 59 60 61 char *regname[6] = {"rbx", "rbp", "r12", "r13", "r14", "r15"}; 62 63 #define DIR_BIT(rflags) (((rflags) & (1<<10)) != 0) 64 65 66 /* Return 1 if ok, 0 if not */ 67 68 int 69 calling_conventions_check (void) 70 { 71 const char *header = "Violated calling conventions:\n"; 72 int ret = 1; 73 int i; 74 75 #define CHECK(callreg, regstr, value) \ 76 if (callreg != value) \ 77 { \ 78 printf ("%s %s got 0x%016lX want 0x%016lX\n", \ 79 header, regstr, callreg, value); \ 80 header = ""; \ 81 ret = 0; \ 82 } 83 84 for (i = 0; i < 6; i++) 85 { 86 CHECK (calling_conventions_values[VAL+i], regname[i], calling_conventions_values[WANT+i]); 87 } 88 89 if (DIR_BIT (calling_conventions_values[RFLAGS]) != 0) 90 { 91 printf ("%s rflags dir bit got %d want 0\n", 92 header, DIR_BIT (calling_conventions_values[RFLAGS])); 93 header = ""; 94 ret = 0; 95 } 96 97 if ((calling_conventions_fenv.tag & 0xFFFF) != 0xFFFF) 98 { 99 printf ("%s fpu tags got 0x%X want 0xFFFF\n", 100 header, calling_conventions_fenv.tag & 0xFFFF); 101 header = ""; 102 ret = 0; 103 } 104 105 return ret; 106 } 107