Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1 | /* ----------------------------------------------------------------------- |
Christian Heimes | 7864476 | 2008-03-04 23:39:23 +0000 | [diff] [blame] | 2 | ffi_darwin.c |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 3 | |
Christian Heimes | 7864476 | 2008-03-04 23:39:23 +0000 | [diff] [blame] | 4 | Copyright (C) 1998 Geoffrey Keating |
| 5 | Copyright (C) 2001 John Hornkvist |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 6 | Copyright (C) 2002, 2006, 2007, 2009, 2010 Free Software Foundation, Inc. |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 7 | |
Christian Heimes | 7864476 | 2008-03-04 23:39:23 +0000 | [diff] [blame] | 8 | FFI support for Darwin and AIX. |
| 9 | |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 10 | Permission is hereby granted, free of charge, to any person obtaining |
| 11 | a copy of this software and associated documentation files (the |
| 12 | ``Software''), to deal in the Software without restriction, including |
| 13 | without limitation the rights to use, copy, modify, merge, publish, |
| 14 | distribute, sublicense, and/or sell copies of the Software, and to |
| 15 | permit persons to whom the Software is furnished to do so, subject to |
| 16 | the following conditions: |
| 17 | |
| 18 | The above copyright notice and this permission notice shall be included |
| 19 | in all copies or substantial portions of the Software. |
| 20 | |
| 21 | THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 22 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 23 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 24 | IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 25 | OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 26 | ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 27 | OTHER DEALINGS IN THE SOFTWARE. |
| 28 | ----------------------------------------------------------------------- */ |
| 29 | |
| 30 | #include <ffi.h> |
| 31 | #include <ffi_common.h> |
| 32 | |
| 33 | #include <stdlib.h> |
| 34 | |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 35 | extern void ffi_closure_ASM (void); |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 36 | |
| 37 | enum { |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 38 | /* The assembly depends on these exact flags. |
| 39 | For Darwin64 (when FLAG_RETURNS_STRUCT is set): |
| 40 | FLAG_RETURNS_FP indicates that the structure embeds FP data. |
| 41 | FLAG_RETURNS_128BITS signals a special struct size that is not |
| 42 | expanded for float content. */ |
| 43 | FLAG_RETURNS_128BITS = 1 << (31-31), /* These go in cr7 */ |
| 44 | FLAG_RETURNS_NOTHING = 1 << (31-30), |
| 45 | FLAG_RETURNS_FP = 1 << (31-29), |
| 46 | FLAG_RETURNS_64BITS = 1 << (31-28), |
| 47 | |
| 48 | FLAG_RETURNS_STRUCT = 1 << (31-27), /* This goes in cr6 */ |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 49 | |
| 50 | FLAG_ARG_NEEDS_COPY = 1 << (31- 7), |
| 51 | FLAG_FP_ARGUMENTS = 1 << (31- 6), /* cr1.eq; specified by ABI */ |
| 52 | FLAG_4_GPR_ARGUMENTS = 1 << (31- 5), |
| 53 | FLAG_RETVAL_REFERENCE = 1 << (31- 4) |
| 54 | }; |
| 55 | |
| 56 | /* About the DARWIN ABI. */ |
| 57 | enum { |
| 58 | NUM_GPR_ARG_REGISTERS = 8, |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 59 | NUM_FPR_ARG_REGISTERS = 13, |
| 60 | LINKAGE_AREA_GPRS = 6 |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 61 | }; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 62 | |
| 63 | enum { ASM_NEEDS_REGISTERS = 4 }; /* r28-r31 */ |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 64 | |
| 65 | /* ffi_prep_args is called by the assembly routine once stack space |
| 66 | has been allocated for the function's arguments. |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 67 | |
| 68 | m32/m64 |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 69 | |
| 70 | The stack layout we want looks like this: |
| 71 | |
| 72 | | Return address from ffi_call_DARWIN | higher addresses |
| 73 | |--------------------------------------------| |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 74 | | Previous backchain pointer 4/8 | stack pointer here |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 75 | |--------------------------------------------|<+ <<< on entry to |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 76 | | ASM_NEEDS_REGISTERS=r28-r31 4*(4/8) | | ffi_call_DARWIN |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 77 | |--------------------------------------------| | |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 78 | | When we have any FP activity... the | | |
| 79 | | FPRs occupy NUM_FPR_ARG_REGISTERS slots | | |
| 80 | | here fp13 .. fp1 from high to low addr. | | |
| 81 | ~ ~ ~ |
| 82 | | Parameters (at least 8*4/8=32/64) | | NUM_GPR_ARG_REGISTERS |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 83 | |--------------------------------------------| | |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 84 | | TOC=R2 (AIX) Reserved (Darwin) 4/8 | | |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 85 | |--------------------------------------------| | stack | |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 86 | | Reserved 2*4/8 | | grows | |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 87 | |--------------------------------------------| | down V |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 88 | | Space for callee's LR 4/8 | | |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 89 | |--------------------------------------------| | lower addresses |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 90 | | Saved CR [low word for m64] 4/8 | | |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 91 | |--------------------------------------------| | stack pointer here |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 92 | | Current backchain pointer 4/8 |-/ during |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 93 | |--------------------------------------------| <<< ffi_call_DARWIN |
| 94 | |
| 95 | */ |
| 96 | |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 97 | #if defined(POWERPC_DARWIN64) |
| 98 | static void |
| 99 | darwin64_pass_struct_by_value |
| 100 | (ffi_type *, char *, unsigned, unsigned *, double **, unsigned long **); |
| 101 | #endif |
| 102 | |
| 103 | /* This depends on GPR_SIZE = sizeof (unsigned long) */ |
| 104 | |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 105 | void |
| 106 | ffi_prep_args (extended_cif *ecif, unsigned long *const stack) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 107 | { |
| 108 | const unsigned bytes = ecif->cif->bytes; |
| 109 | const unsigned flags = ecif->cif->flags; |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 110 | const unsigned nargs = ecif->cif->nargs; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 111 | #if !defined(POWERPC_DARWIN64) |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 112 | const ffi_abi abi = ecif->cif->abi; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 113 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 114 | |
| 115 | /* 'stacktop' points at the previous backchain pointer. */ |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 116 | unsigned long *const stacktop = stack + (bytes / sizeof(unsigned long)); |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 117 | |
| 118 | /* 'fpr_base' points at the space for fpr1, and grows upwards as |
| 119 | we use FPR registers. */ |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 120 | double *fpr_base = (double *) (stacktop - ASM_NEEDS_REGISTERS) - NUM_FPR_ARG_REGISTERS; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 121 | int gp_count = 0, fparg_count = 0; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 122 | |
| 123 | /* 'next_arg' grows up as we put parameters in it. */ |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 124 | unsigned long *next_arg = stack + LINKAGE_AREA_GPRS; /* 6 reserved positions. */ |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 125 | |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 126 | int i; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 127 | double double_tmp; |
| 128 | void **p_argv = ecif->avalue; |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 129 | unsigned long gprvalue; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 130 | ffi_type** ptr = ecif->cif->arg_types; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 131 | #if !defined(POWERPC_DARWIN64) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 132 | char *dest_cpy; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 133 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 134 | unsigned size_al = 0; |
| 135 | |
| 136 | /* Check that everything starts aligned properly. */ |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 137 | FFI_ASSERT(((unsigned) (char *) stack & 0xF) == 0); |
| 138 | FFI_ASSERT(((unsigned) (char *) stacktop & 0xF) == 0); |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 139 | FFI_ASSERT((bytes & 0xF) == 0); |
| 140 | |
| 141 | /* Deal with return values that are actually pass-by-reference. |
| 142 | Rule: |
| 143 | Return values are referenced by r3, so r4 is the first parameter. */ |
| 144 | |
| 145 | if (flags & FLAG_RETVAL_REFERENCE) |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 146 | *next_arg++ = (unsigned long) (char *) ecif->rvalue; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 147 | |
| 148 | /* Now for the arguments. */ |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 149 | for (i = nargs; i > 0; i--, ptr++, p_argv++) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 150 | { |
| 151 | switch ((*ptr)->type) |
| 152 | { |
| 153 | /* If a floating-point parameter appears before all of the general- |
| 154 | purpose registers are filled, the corresponding GPRs that match |
| 155 | the size of the floating-point parameter are skipped. */ |
| 156 | case FFI_TYPE_FLOAT: |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 157 | double_tmp = *(float *) *p_argv; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 158 | if (fparg_count < NUM_FPR_ARG_REGISTERS) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 159 | *fpr_base++ = double_tmp; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 160 | #if defined(POWERPC_DARWIN) |
| 161 | *(float *)next_arg = *(float *) *p_argv; |
| 162 | #else |
| 163 | *(double *)next_arg = double_tmp; |
| 164 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 165 | next_arg++; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 166 | gp_count++; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 167 | fparg_count++; |
| 168 | FFI_ASSERT(flags & FLAG_FP_ARGUMENTS); |
| 169 | break; |
| 170 | |
| 171 | case FFI_TYPE_DOUBLE: |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 172 | double_tmp = *(double *) *p_argv; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 173 | if (fparg_count < NUM_FPR_ARG_REGISTERS) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 174 | *fpr_base++ = double_tmp; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 175 | *(double *)next_arg = double_tmp; |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 176 | #ifdef POWERPC64 |
| 177 | next_arg++; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 178 | gp_count++; |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 179 | #else |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 180 | next_arg += 2; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 181 | gp_count += 2; |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 182 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 183 | fparg_count++; |
| 184 | FFI_ASSERT(flags & FLAG_FP_ARGUMENTS); |
| 185 | break; |
| 186 | |
| 187 | #if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE |
| 188 | |
| 189 | case FFI_TYPE_LONGDOUBLE: |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 190 | # if defined(POWERPC64) && !defined(POWERPC_DARWIN64) |
| 191 | /* ??? This will exceed the regs count when the value starts at fp13 |
| 192 | and it will not put the extra bit on the stack. */ |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 193 | if (fparg_count < NUM_FPR_ARG_REGISTERS) |
| 194 | *(long double *) fpr_base++ = *(long double *) *p_argv; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 195 | else |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 196 | *(long double *) next_arg = *(long double *) *p_argv; |
| 197 | next_arg += 2; |
| 198 | fparg_count += 2; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 199 | # else |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 200 | double_tmp = ((double *) *p_argv)[0]; |
| 201 | if (fparg_count < NUM_FPR_ARG_REGISTERS) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 202 | *fpr_base++ = double_tmp; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 203 | *(double *) next_arg = double_tmp; |
| 204 | # if defined(POWERPC_DARWIN64) |
| 205 | next_arg++; |
| 206 | gp_count++; |
| 207 | # else |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 208 | next_arg += 2; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 209 | gp_count += 2; |
| 210 | # endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 211 | fparg_count++; |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 212 | double_tmp = ((double *) *p_argv)[1]; |
| 213 | if (fparg_count < NUM_FPR_ARG_REGISTERS) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 214 | *fpr_base++ = double_tmp; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 215 | *(double *) next_arg = double_tmp; |
| 216 | # if defined(POWERPC_DARWIN64) |
| 217 | next_arg++; |
| 218 | gp_count++; |
| 219 | # else |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 220 | next_arg += 2; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 221 | gp_count += 2; |
| 222 | # endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 223 | fparg_count++; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 224 | # endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 225 | FFI_ASSERT(flags & FLAG_FP_ARGUMENTS); |
| 226 | break; |
| 227 | #endif |
| 228 | case FFI_TYPE_UINT64: |
| 229 | case FFI_TYPE_SINT64: |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 230 | #ifdef POWERPC64 |
| 231 | gprvalue = *(long long *) *p_argv; |
| 232 | goto putgpr; |
| 233 | #else |
| 234 | *(long long *) next_arg = *(long long *) *p_argv; |
| 235 | next_arg += 2; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 236 | gp_count += 2; |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 237 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 238 | break; |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 239 | case FFI_TYPE_POINTER: |
| 240 | gprvalue = *(unsigned long *) *p_argv; |
| 241 | goto putgpr; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 242 | case FFI_TYPE_UINT8: |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 243 | gprvalue = *(unsigned char *) *p_argv; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 244 | goto putgpr; |
| 245 | case FFI_TYPE_SINT8: |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 246 | gprvalue = *(signed char *) *p_argv; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 247 | goto putgpr; |
| 248 | case FFI_TYPE_UINT16: |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 249 | gprvalue = *(unsigned short *) *p_argv; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 250 | goto putgpr; |
| 251 | case FFI_TYPE_SINT16: |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 252 | gprvalue = *(signed short *) *p_argv; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 253 | goto putgpr; |
| 254 | |
| 255 | case FFI_TYPE_STRUCT: |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 256 | size_al = (*ptr)->size; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 257 | #if defined(POWERPC_DARWIN64) |
| 258 | next_arg = (unsigned long *)ALIGN((char *)next_arg, (*ptr)->alignment); |
| 259 | darwin64_pass_struct_by_value (*ptr, (char *) *p_argv, |
| 260 | (unsigned) size_al, |
| 261 | (unsigned int *) &fparg_count, |
| 262 | &fpr_base, &next_arg); |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 263 | #else |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 264 | dest_cpy = (char *) next_arg; |
| 265 | |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 266 | /* If the first member of the struct is a double, then include enough |
| 267 | padding in the struct size to align it to double-word. */ |
| 268 | if ((*ptr)->elements[0]->type == FFI_TYPE_DOUBLE) |
| 269 | size_al = ALIGN((*ptr)->size, 8); |
| 270 | |
| 271 | # if defined(POWERPC64) |
| 272 | FFI_ASSERT (abi != FFI_DARWIN); |
| 273 | memcpy ((char *) dest_cpy, (char *) *p_argv, size_al); |
| 274 | next_arg += (size_al + 7) / 8; |
| 275 | # else |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 276 | /* Structures that match the basic modes (QI 1 byte, HI 2 bytes, |
| 277 | SI 4 bytes) are aligned as if they were those modes. |
| 278 | Structures with 3 byte in size are padded upwards. */ |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 279 | if (size_al < 3 && abi == FFI_DARWIN) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 280 | dest_cpy += 4 - size_al; |
| 281 | |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 282 | memcpy((char *) dest_cpy, (char *) *p_argv, size_al); |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 283 | next_arg += (size_al + 3) / 4; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 284 | # endif |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 285 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 286 | break; |
| 287 | |
| 288 | case FFI_TYPE_INT: |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 289 | case FFI_TYPE_SINT32: |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 290 | gprvalue = *(signed int *) *p_argv; |
| 291 | goto putgpr; |
| 292 | |
| 293 | case FFI_TYPE_UINT32: |
| 294 | gprvalue = *(unsigned int *) *p_argv; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 295 | putgpr: |
| 296 | *next_arg++ = gprvalue; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 297 | gp_count++; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 298 | break; |
| 299 | default: |
| 300 | break; |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | /* Check that we didn't overrun the stack... */ |
| 305 | //FFI_ASSERT(gpr_base <= stacktop - ASM_NEEDS_REGISTERS); |
| 306 | //FFI_ASSERT((unsigned *)fpr_base |
| 307 | // <= stacktop - ASM_NEEDS_REGISTERS - NUM_GPR_ARG_REGISTERS); |
| 308 | //FFI_ASSERT(flags & FLAG_4_GPR_ARGUMENTS || intarg_count <= 4); |
| 309 | } |
| 310 | |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 311 | #if defined(POWERPC_DARWIN64) |
| 312 | |
| 313 | /* See if we can put some of the struct into fprs. |
| 314 | This should not be called for structures of size 16 bytes, since these are not |
| 315 | broken out this way. */ |
| 316 | static void |
| 317 | darwin64_scan_struct_for_floats (ffi_type *s, unsigned *nfpr) |
| 318 | { |
| 319 | int i; |
| 320 | |
| 321 | FFI_ASSERT (s->type == FFI_TYPE_STRUCT) |
| 322 | |
| 323 | for (i = 0; s->elements[i] != NULL; i++) |
| 324 | { |
| 325 | ffi_type *p = s->elements[i]; |
| 326 | switch (p->type) |
| 327 | { |
| 328 | case FFI_TYPE_STRUCT: |
| 329 | darwin64_scan_struct_for_floats (p, nfpr); |
| 330 | break; |
| 331 | case FFI_TYPE_LONGDOUBLE: |
| 332 | (*nfpr) += 2; |
| 333 | break; |
| 334 | case FFI_TYPE_DOUBLE: |
| 335 | case FFI_TYPE_FLOAT: |
| 336 | (*nfpr) += 1; |
| 337 | break; |
| 338 | default: |
| 339 | break; |
| 340 | } |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | static int |
| 345 | darwin64_struct_size_exceeds_gprs_p (ffi_type *s, char *src, unsigned *nfpr) |
| 346 | { |
| 347 | unsigned struct_offset=0, i; |
| 348 | |
| 349 | for (i = 0; s->elements[i] != NULL; i++) |
| 350 | { |
| 351 | char *item_base; |
| 352 | ffi_type *p = s->elements[i]; |
| 353 | /* Find the start of this item (0 for the first one). */ |
| 354 | if (i > 0) |
| 355 | struct_offset = ALIGN(struct_offset, p->alignment); |
| 356 | |
| 357 | item_base = src + struct_offset; |
| 358 | |
| 359 | switch (p->type) |
| 360 | { |
| 361 | case FFI_TYPE_STRUCT: |
| 362 | if (darwin64_struct_size_exceeds_gprs_p (p, item_base, nfpr)) |
| 363 | return 1; |
| 364 | break; |
| 365 | case FFI_TYPE_LONGDOUBLE: |
| 366 | if (*nfpr >= NUM_FPR_ARG_REGISTERS) |
| 367 | return 1; |
| 368 | (*nfpr) += 1; |
| 369 | item_base += 8; |
| 370 | /* FALL THROUGH */ |
| 371 | case FFI_TYPE_DOUBLE: |
| 372 | if (*nfpr >= NUM_FPR_ARG_REGISTERS) |
| 373 | return 1; |
| 374 | (*nfpr) += 1; |
| 375 | break; |
| 376 | case FFI_TYPE_FLOAT: |
| 377 | if (*nfpr >= NUM_FPR_ARG_REGISTERS) |
| 378 | return 1; |
| 379 | (*nfpr) += 1; |
| 380 | break; |
| 381 | default: |
| 382 | /* If we try and place any item, that is non-float, once we've |
| 383 | exceeded the 8 GPR mark, then we can't fit the struct. */ |
| 384 | if ((unsigned long)item_base >= 8*8) |
| 385 | return 1; |
| 386 | break; |
| 387 | } |
| 388 | /* now count the size of what we just used. */ |
| 389 | struct_offset += p->size; |
| 390 | } |
| 391 | return 0; |
| 392 | } |
| 393 | |
| 394 | /* Can this struct be returned by value? */ |
| 395 | int |
| 396 | darwin64_struct_ret_by_value_p (ffi_type *s) |
| 397 | { |
| 398 | unsigned nfp = 0; |
| 399 | |
| 400 | FFI_ASSERT (s && s->type == FFI_TYPE_STRUCT); |
| 401 | |
| 402 | /* The largest structure we can return is 8long + 13 doubles. */ |
| 403 | if (s->size > 168) |
| 404 | return 0; |
| 405 | |
| 406 | /* We can't pass more than 13 floats. */ |
| 407 | darwin64_scan_struct_for_floats (s, &nfp); |
| 408 | if (nfp > 13) |
| 409 | return 0; |
| 410 | |
| 411 | /* If there are not too many floats, and the struct is |
| 412 | small enough to accommodate in the GPRs, then it must be OK. */ |
| 413 | if (s->size <= 64) |
| 414 | return 1; |
| 415 | |
| 416 | /* Well, we have to look harder. */ |
| 417 | nfp = 0; |
| 418 | if (darwin64_struct_size_exceeds_gprs_p (s, NULL, &nfp)) |
| 419 | return 0; |
| 420 | |
| 421 | return 1; |
| 422 | } |
| 423 | |
| 424 | void |
| 425 | darwin64_pass_struct_floats (ffi_type *s, char *src, |
| 426 | unsigned *nfpr, double **fprs) |
| 427 | { |
| 428 | int i; |
| 429 | double *fpr_base = *fprs; |
| 430 | unsigned struct_offset = 0; |
| 431 | |
| 432 | /* We don't assume anything about the alignment of the source. */ |
| 433 | for (i = 0; s->elements[i] != NULL; i++) |
| 434 | { |
| 435 | char *item_base; |
| 436 | ffi_type *p = s->elements[i]; |
| 437 | /* Find the start of this item (0 for the first one). */ |
| 438 | if (i > 0) |
| 439 | struct_offset = ALIGN(struct_offset, p->alignment); |
| 440 | item_base = src + struct_offset; |
| 441 | |
| 442 | switch (p->type) |
| 443 | { |
| 444 | case FFI_TYPE_STRUCT: |
| 445 | darwin64_pass_struct_floats (p, item_base, nfpr, |
| 446 | &fpr_base); |
| 447 | break; |
| 448 | case FFI_TYPE_LONGDOUBLE: |
| 449 | if (*nfpr < NUM_FPR_ARG_REGISTERS) |
| 450 | *fpr_base++ = *(double *)item_base; |
| 451 | (*nfpr) += 1; |
| 452 | item_base += 8; |
| 453 | /* FALL THROUGH */ |
| 454 | case FFI_TYPE_DOUBLE: |
| 455 | if (*nfpr < NUM_FPR_ARG_REGISTERS) |
| 456 | *fpr_base++ = *(double *)item_base; |
| 457 | (*nfpr) += 1; |
| 458 | break; |
| 459 | case FFI_TYPE_FLOAT: |
| 460 | if (*nfpr < NUM_FPR_ARG_REGISTERS) |
| 461 | *fpr_base++ = (double) *(float *)item_base; |
| 462 | (*nfpr) += 1; |
| 463 | break; |
| 464 | default: |
| 465 | break; |
| 466 | } |
| 467 | /* now count the size of what we just used. */ |
| 468 | struct_offset += p->size; |
| 469 | } |
| 470 | /* Update the scores. */ |
| 471 | *fprs = fpr_base; |
| 472 | } |
| 473 | |
| 474 | /* Darwin64 special rules. |
| 475 | Break out a struct into params and float registers. */ |
| 476 | static void |
| 477 | darwin64_pass_struct_by_value (ffi_type *s, char *src, unsigned size, |
| 478 | unsigned *nfpr, double **fprs, unsigned long **arg) |
| 479 | { |
| 480 | unsigned long *next_arg = *arg; |
| 481 | char *dest_cpy = (char *)next_arg; |
| 482 | |
| 483 | FFI_ASSERT (s->type == FFI_TYPE_STRUCT) |
| 484 | |
| 485 | if (!size) |
| 486 | return; |
| 487 | |
| 488 | /* First... special cases. */ |
| 489 | if (size < 3 |
| 490 | || (size == 4 |
| 491 | && s->elements[0] |
| 492 | && s->elements[0]->type != FFI_TYPE_FLOAT)) |
| 493 | { |
| 494 | /* Must be at least one GPR, padding is unspecified in value, |
| 495 | let's make it zero. */ |
| 496 | *next_arg = 0UL; |
| 497 | dest_cpy += 8 - size; |
| 498 | memcpy ((char *) dest_cpy, src, size); |
| 499 | next_arg++; |
| 500 | } |
| 501 | else if (size == 16) |
| 502 | { |
| 503 | memcpy ((char *) dest_cpy, src, size); |
| 504 | next_arg += 2; |
| 505 | } |
| 506 | else |
| 507 | { |
| 508 | /* now the general case, we consider embedded floats. */ |
| 509 | memcpy ((char *) dest_cpy, src, size); |
| 510 | darwin64_pass_struct_floats (s, src, nfpr, fprs); |
| 511 | next_arg += (size+7)/8; |
| 512 | } |
| 513 | |
| 514 | *arg = next_arg; |
| 515 | } |
| 516 | |
| 517 | double * |
| 518 | darwin64_struct_floats_to_mem (ffi_type *s, char *dest, double *fprs, unsigned *nf) |
| 519 | { |
| 520 | int i; |
| 521 | unsigned struct_offset = 0; |
| 522 | |
| 523 | /* We don't assume anything about the alignment of the source. */ |
| 524 | for (i = 0; s->elements[i] != NULL; i++) |
| 525 | { |
| 526 | char *item_base; |
| 527 | ffi_type *p = s->elements[i]; |
| 528 | /* Find the start of this item (0 for the first one). */ |
| 529 | if (i > 0) |
| 530 | struct_offset = ALIGN(struct_offset, p->alignment); |
| 531 | item_base = dest + struct_offset; |
| 532 | |
| 533 | switch (p->type) |
| 534 | { |
| 535 | case FFI_TYPE_STRUCT: |
| 536 | fprs = darwin64_struct_floats_to_mem (p, item_base, fprs, nf); |
| 537 | break; |
| 538 | case FFI_TYPE_LONGDOUBLE: |
| 539 | if (*nf < NUM_FPR_ARG_REGISTERS) |
| 540 | { |
| 541 | *(double *)item_base = *fprs++ ; |
| 542 | (*nf) += 1; |
| 543 | } |
| 544 | item_base += 8; |
| 545 | /* FALL THROUGH */ |
| 546 | case FFI_TYPE_DOUBLE: |
| 547 | if (*nf < NUM_FPR_ARG_REGISTERS) |
| 548 | { |
| 549 | *(double *)item_base = *fprs++ ; |
| 550 | (*nf) += 1; |
| 551 | } |
| 552 | break; |
| 553 | case FFI_TYPE_FLOAT: |
| 554 | if (*nf < NUM_FPR_ARG_REGISTERS) |
| 555 | { |
| 556 | *(float *)item_base = (float) *fprs++ ; |
| 557 | (*nf) += 1; |
| 558 | } |
| 559 | break; |
| 560 | default: |
| 561 | break; |
| 562 | } |
| 563 | /* now count the size of what we just used. */ |
| 564 | struct_offset += p->size; |
| 565 | } |
| 566 | return fprs; |
| 567 | } |
| 568 | |
| 569 | #endif |
| 570 | |
Christian Heimes | 7864476 | 2008-03-04 23:39:23 +0000 | [diff] [blame] | 571 | /* Adjust the size of S to be correct for Darwin. |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 572 | On Darwin m32, the first field of a structure has natural alignment. |
| 573 | On Darwin m64, all fields have natural alignment. */ |
Christian Heimes | 7864476 | 2008-03-04 23:39:23 +0000 | [diff] [blame] | 574 | |
| 575 | static void |
| 576 | darwin_adjust_aggregate_sizes (ffi_type *s) |
| 577 | { |
| 578 | int i; |
| 579 | |
| 580 | if (s->type != FFI_TYPE_STRUCT) |
| 581 | return; |
| 582 | |
| 583 | s->size = 0; |
| 584 | for (i = 0; s->elements[i] != NULL; i++) |
| 585 | { |
| 586 | ffi_type *p; |
| 587 | int align; |
| 588 | |
| 589 | p = s->elements[i]; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 590 | if (p->type == FFI_TYPE_STRUCT) |
| 591 | darwin_adjust_aggregate_sizes (p); |
| 592 | #if defined(POWERPC_DARWIN64) |
| 593 | /* Natural alignment for all items. */ |
| 594 | align = p->alignment; |
| 595 | #else |
| 596 | /* Natrual alignment for the first item... */ |
| 597 | if (i == 0) |
| 598 | align = p->alignment; |
Christian Heimes | 7864476 | 2008-03-04 23:39:23 +0000 | [diff] [blame] | 599 | else if (p->alignment == 16 || p->alignment < 4) |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 600 | /* .. subsequent items with vector or align < 4 have natural align. */ |
Christian Heimes | 7864476 | 2008-03-04 23:39:23 +0000 | [diff] [blame] | 601 | align = p->alignment; |
| 602 | else |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 603 | /* .. or align is 4. */ |
Christian Heimes | 7864476 | 2008-03-04 23:39:23 +0000 | [diff] [blame] | 604 | align = 4; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 605 | #endif |
| 606 | /* Pad, if necessary, before adding the current item. */ |
Christian Heimes | 7864476 | 2008-03-04 23:39:23 +0000 | [diff] [blame] | 607 | s->size = ALIGN(s->size, align) + p->size; |
| 608 | } |
| 609 | |
| 610 | s->size = ALIGN(s->size, s->alignment); |
| 611 | |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 612 | /* This should not be necessary on m64, but harmless. */ |
Christian Heimes | 7864476 | 2008-03-04 23:39:23 +0000 | [diff] [blame] | 613 | if (s->elements[0]->type == FFI_TYPE_UINT64 |
| 614 | || s->elements[0]->type == FFI_TYPE_SINT64 |
| 615 | || s->elements[0]->type == FFI_TYPE_DOUBLE |
| 616 | || s->elements[0]->alignment == 8) |
| 617 | s->alignment = s->alignment > 8 ? s->alignment : 8; |
| 618 | /* Do not add additional tail padding. */ |
| 619 | } |
| 620 | |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 621 | /* Adjust the size of S to be correct for AIX. |
| 622 | Word-align double unless it is the first member of a structure. */ |
| 623 | |
| 624 | static void |
| 625 | aix_adjust_aggregate_sizes (ffi_type *s) |
| 626 | { |
| 627 | int i; |
| 628 | |
| 629 | if (s->type != FFI_TYPE_STRUCT) |
| 630 | return; |
| 631 | |
| 632 | s->size = 0; |
| 633 | for (i = 0; s->elements[i] != NULL; i++) |
| 634 | { |
| 635 | ffi_type *p; |
| 636 | int align; |
| 637 | |
| 638 | p = s->elements[i]; |
| 639 | aix_adjust_aggregate_sizes (p); |
| 640 | align = p->alignment; |
| 641 | if (i != 0 && p->type == FFI_TYPE_DOUBLE) |
| 642 | align = 4; |
| 643 | s->size = ALIGN(s->size, align) + p->size; |
| 644 | } |
| 645 | |
| 646 | s->size = ALIGN(s->size, s->alignment); |
| 647 | |
| 648 | if (s->elements[0]->type == FFI_TYPE_UINT64 |
| 649 | || s->elements[0]->type == FFI_TYPE_SINT64 |
| 650 | || s->elements[0]->type == FFI_TYPE_DOUBLE |
| 651 | || s->elements[0]->alignment == 8) |
| 652 | s->alignment = s->alignment > 8 ? s->alignment : 8; |
| 653 | /* Do not add additional tail padding. */ |
| 654 | } |
| 655 | |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 656 | /* Perform machine dependent cif processing. */ |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 657 | ffi_status |
| 658 | ffi_prep_cif_machdep (ffi_cif *cif) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 659 | { |
| 660 | /* All this is for the DARWIN ABI. */ |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 661 | unsigned i; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 662 | ffi_type **ptr; |
| 663 | unsigned bytes; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 664 | unsigned fparg_count = 0, intarg_count = 0; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 665 | unsigned flags = 0; |
| 666 | unsigned size_al = 0; |
| 667 | |
| 668 | /* All the machine-independent calculation of cif->bytes will be wrong. |
Christian Heimes | 7864476 | 2008-03-04 23:39:23 +0000 | [diff] [blame] | 669 | All the calculation of structure sizes will also be wrong. |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 670 | Redo the calculation for DARWIN. */ |
| 671 | |
Christian Heimes | 7864476 | 2008-03-04 23:39:23 +0000 | [diff] [blame] | 672 | if (cif->abi == FFI_DARWIN) |
| 673 | { |
| 674 | darwin_adjust_aggregate_sizes (cif->rtype); |
| 675 | for (i = 0; i < cif->nargs; i++) |
| 676 | darwin_adjust_aggregate_sizes (cif->arg_types[i]); |
| 677 | } |
| 678 | |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 679 | if (cif->abi == FFI_AIX) |
| 680 | { |
| 681 | aix_adjust_aggregate_sizes (cif->rtype); |
| 682 | for (i = 0; i < cif->nargs; i++) |
| 683 | aix_adjust_aggregate_sizes (cif->arg_types[i]); |
| 684 | } |
| 685 | |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 686 | /* Space for the frame pointer, callee's LR, CR, etc, and for |
| 687 | the asm's temp regs. */ |
| 688 | |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 689 | bytes = (LINKAGE_AREA_GPRS + ASM_NEEDS_REGISTERS) * sizeof(unsigned long); |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 690 | |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 691 | /* Return value handling. |
| 692 | The rules m32 are as follows: |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 693 | - 32-bit (or less) integer values are returned in gpr3; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 694 | - structures of size <= 4 bytes also returned in gpr3; |
| 695 | - 64-bit integer values [??? and structures between 5 and 8 bytes] are |
| 696 | returned in gpr3 and gpr4; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 697 | - Single/double FP values are returned in fpr1; |
| 698 | - Long double FP (if not equivalent to double) values are returned in |
| 699 | fpr1 and fpr2; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 700 | m64: |
| 701 | - 64-bit or smaller integral values are returned in GPR3 |
| 702 | - Single/double FP values are returned in fpr1; |
| 703 | - Long double FP values are returned in fpr1 and fpr2; |
| 704 | m64 Structures: |
| 705 | - If the structure could be accommodated in registers were it to be the |
| 706 | first argument to a routine, then it is returned in those registers. |
| 707 | m32/m64 structures otherwise: |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 708 | - Larger structures values are allocated space and a pointer is passed |
| 709 | as the first argument. */ |
| 710 | switch (cif->rtype->type) |
| 711 | { |
| 712 | |
| 713 | #if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE |
| 714 | case FFI_TYPE_LONGDOUBLE: |
| 715 | flags |= FLAG_RETURNS_128BITS; |
| 716 | flags |= FLAG_RETURNS_FP; |
| 717 | break; |
| 718 | #endif |
| 719 | |
| 720 | case FFI_TYPE_DOUBLE: |
| 721 | flags |= FLAG_RETURNS_64BITS; |
| 722 | /* Fall through. */ |
| 723 | case FFI_TYPE_FLOAT: |
| 724 | flags |= FLAG_RETURNS_FP; |
| 725 | break; |
| 726 | |
| 727 | case FFI_TYPE_UINT64: |
| 728 | case FFI_TYPE_SINT64: |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 729 | #ifdef POWERPC64 |
| 730 | case FFI_TYPE_POINTER: |
| 731 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 732 | flags |= FLAG_RETURNS_64BITS; |
| 733 | break; |
| 734 | |
| 735 | case FFI_TYPE_STRUCT: |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 736 | #if defined(POWERPC_DARWIN64) |
| 737 | { |
| 738 | /* Can we fit the struct into regs? */ |
| 739 | if (darwin64_struct_ret_by_value_p (cif->rtype)) |
| 740 | { |
| 741 | unsigned nfpr = 0; |
| 742 | flags |= FLAG_RETURNS_STRUCT; |
| 743 | if (cif->rtype->size != 16) |
| 744 | darwin64_scan_struct_for_floats (cif->rtype, &nfpr) ; |
| 745 | else |
| 746 | flags |= FLAG_RETURNS_128BITS; |
| 747 | /* Will be 0 for 16byte struct. */ |
| 748 | if (nfpr) |
| 749 | flags |= FLAG_RETURNS_FP; |
| 750 | } |
| 751 | else /* By ref. */ |
| 752 | { |
| 753 | flags |= FLAG_RETVAL_REFERENCE; |
| 754 | flags |= FLAG_RETURNS_NOTHING; |
| 755 | intarg_count++; |
| 756 | } |
| 757 | } |
| 758 | #elif defined(DARWIN_PPC) |
| 759 | if (cif->rtype->size <= 4) |
| 760 | flags |= FLAG_RETURNS_STRUCT; |
| 761 | else /* else by reference. */ |
| 762 | { |
| 763 | flags |= FLAG_RETVAL_REFERENCE; |
| 764 | flags |= FLAG_RETURNS_NOTHING; |
| 765 | intarg_count++; |
| 766 | } |
| 767 | #else /* assume we pass by ref. */ |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 768 | flags |= FLAG_RETVAL_REFERENCE; |
| 769 | flags |= FLAG_RETURNS_NOTHING; |
| 770 | intarg_count++; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 771 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 772 | break; |
| 773 | case FFI_TYPE_VOID: |
| 774 | flags |= FLAG_RETURNS_NOTHING; |
| 775 | break; |
| 776 | |
| 777 | default: |
| 778 | /* Returns 32-bit integer, or similar. Nothing to do here. */ |
| 779 | break; |
| 780 | } |
| 781 | |
| 782 | /* The first NUM_GPR_ARG_REGISTERS words of integer arguments, and the |
| 783 | first NUM_FPR_ARG_REGISTERS fp arguments, go in registers; the rest |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 784 | goes on the stack. |
| 785 | ??? Structures are passed as a pointer to a copy of the structure. |
| 786 | Stuff on the stack needs to keep proper alignment. |
| 787 | For m64 the count is effectively of half-GPRs. */ |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 788 | for (ptr = cif->arg_types, i = cif->nargs; i > 0; i--, ptr++) |
| 789 | { |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 790 | unsigned align_words; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 791 | switch ((*ptr)->type) |
| 792 | { |
| 793 | case FFI_TYPE_FLOAT: |
| 794 | case FFI_TYPE_DOUBLE: |
| 795 | fparg_count++; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 796 | #if !defined(POWERPC_DARWIN64) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 797 | /* If this FP arg is going on the stack, it must be |
| 798 | 8-byte-aligned. */ |
| 799 | if (fparg_count > NUM_FPR_ARG_REGISTERS |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 800 | && (intarg_count & 0x01) != 0) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 801 | intarg_count++; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 802 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 803 | break; |
| 804 | |
| 805 | #if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 806 | case FFI_TYPE_LONGDOUBLE: |
| 807 | fparg_count += 2; |
| 808 | /* If this FP arg is going on the stack, it must be |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 809 | 16-byte-aligned. */ |
| 810 | if (fparg_count >= NUM_FPR_ARG_REGISTERS) |
| 811 | #if defined (POWERPC64) |
| 812 | intarg_count = ALIGN(intarg_count, 2); |
| 813 | #else |
| 814 | intarg_count = ALIGN(intarg_count, 4); |
| 815 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 816 | break; |
| 817 | #endif |
| 818 | |
| 819 | case FFI_TYPE_UINT64: |
| 820 | case FFI_TYPE_SINT64: |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 821 | #if defined(POWERPC64) |
| 822 | intarg_count++; |
| 823 | #else |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 824 | /* 'long long' arguments are passed as two words, but |
| 825 | either both words must fit in registers or both go |
| 826 | on the stack. If they go on the stack, they must |
| 827 | be 8-byte-aligned. */ |
| 828 | if (intarg_count == NUM_GPR_ARG_REGISTERS-1 |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 829 | || (intarg_count >= NUM_GPR_ARG_REGISTERS |
| 830 | && (intarg_count & 0x01) != 0)) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 831 | intarg_count++; |
| 832 | intarg_count += 2; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 833 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 834 | break; |
| 835 | |
| 836 | case FFI_TYPE_STRUCT: |
| 837 | size_al = (*ptr)->size; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 838 | #if defined(POWERPC_DARWIN64) |
| 839 | align_words = (*ptr)->alignment >> 3; |
| 840 | if (align_words) |
| 841 | intarg_count = ALIGN(intarg_count, align_words); |
| 842 | /* Base size of the struct. */ |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 843 | intarg_count += (size_al + 7) / 8; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 844 | /* If 16 bytes then don't worry about floats. */ |
| 845 | if (size_al != 16) |
| 846 | /* Scan through for floats to be placed in regs. */ |
| 847 | darwin64_scan_struct_for_floats (*ptr, &fparg_count) ; |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 848 | #else |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 849 | align_words = (*ptr)->alignment >> 2; |
| 850 | if (align_words) |
| 851 | intarg_count = ALIGN(intarg_count, align_words); |
| 852 | /* If the first member of the struct is a double, then align |
| 853 | the struct to double-word. |
| 854 | if ((*ptr)->elements[0]->type == FFI_TYPE_DOUBLE) |
| 855 | size_al = ALIGN((*ptr)->size, 8); */ |
| 856 | # ifdef POWERPC64 |
| 857 | intarg_count += (size_al + 7) / 8; |
| 858 | # else |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 859 | intarg_count += (size_al + 3) / 4; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 860 | # endif |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 861 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 862 | break; |
| 863 | |
| 864 | default: |
| 865 | /* Everything else is passed as a 4-byte word in a GPR, either |
| 866 | the object itself or a pointer to it. */ |
| 867 | intarg_count++; |
| 868 | break; |
| 869 | } |
| 870 | } |
| 871 | |
| 872 | if (fparg_count != 0) |
| 873 | flags |= FLAG_FP_ARGUMENTS; |
| 874 | |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 875 | #if defined(POWERPC_DARWIN64) |
| 876 | /* Space to image the FPR registers, if needed - which includes when they might be |
| 877 | used in a struct return. */ |
| 878 | if (fparg_count != 0 |
| 879 | || ((flags & FLAG_RETURNS_STRUCT) |
| 880 | && (flags & FLAG_RETURNS_FP))) |
| 881 | bytes += NUM_FPR_ARG_REGISTERS * sizeof(double); |
| 882 | #else |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 883 | /* Space for the FPR registers, if needed. */ |
| 884 | if (fparg_count != 0) |
| 885 | bytes += NUM_FPR_ARG_REGISTERS * sizeof(double); |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 886 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 887 | |
| 888 | /* Stack space. */ |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 889 | #ifdef POWERPC64 |
| 890 | if ((intarg_count + fparg_count) > NUM_GPR_ARG_REGISTERS) |
| 891 | bytes += (intarg_count + fparg_count) * sizeof(long); |
| 892 | #else |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 893 | if ((intarg_count + 2 * fparg_count) > NUM_GPR_ARG_REGISTERS) |
| 894 | bytes += (intarg_count + 2 * fparg_count) * sizeof(long); |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 895 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 896 | else |
| 897 | bytes += NUM_GPR_ARG_REGISTERS * sizeof(long); |
| 898 | |
| 899 | /* The stack space allocated needs to be a multiple of 16 bytes. */ |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 900 | bytes = ALIGN(bytes, 16) ; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 901 | |
| 902 | cif->flags = flags; |
| 903 | cif->bytes = bytes; |
| 904 | |
| 905 | return FFI_OK; |
| 906 | } |
| 907 | |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 908 | extern void ffi_call_AIX(extended_cif *, long, unsigned, unsigned *, |
Christian Heimes | 7864476 | 2008-03-04 23:39:23 +0000 | [diff] [blame] | 909 | void (*fn)(void), void (*fn2)(void)); |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 910 | |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 911 | extern void ffi_call_DARWIN(extended_cif *, long, unsigned, unsigned *, |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 912 | void (*fn)(void), void (*fn2)(void), ffi_type*); |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 913 | |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 914 | void |
| 915 | ffi_call (ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 916 | { |
| 917 | extended_cif ecif; |
| 918 | |
| 919 | ecif.cif = cif; |
| 920 | ecif.avalue = avalue; |
| 921 | |
| 922 | /* If the return value is a struct and we don't have a return |
| 923 | value address then we need to make one. */ |
| 924 | |
| 925 | if ((rvalue == NULL) && |
| 926 | (cif->rtype->type == FFI_TYPE_STRUCT)) |
| 927 | { |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 928 | ecif.rvalue = alloca (cif->rtype->size); |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 929 | } |
| 930 | else |
| 931 | ecif.rvalue = rvalue; |
| 932 | |
| 933 | switch (cif->abi) |
| 934 | { |
| 935 | case FFI_AIX: |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 936 | ffi_call_AIX(&ecif, -(long)cif->bytes, cif->flags, ecif.rvalue, fn, |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 937 | FFI_FN(ffi_prep_args)); |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 938 | break; |
| 939 | case FFI_DARWIN: |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 940 | ffi_call_DARWIN(&ecif, -(long)cif->bytes, cif->flags, ecif.rvalue, fn, |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 941 | FFI_FN(ffi_prep_args), cif->rtype); |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 942 | break; |
| 943 | default: |
| 944 | FFI_ASSERT(0); |
| 945 | break; |
| 946 | } |
| 947 | } |
| 948 | |
| 949 | static void flush_icache(char *); |
| 950 | static void flush_range(char *, int); |
| 951 | |
| 952 | /* The layout of a function descriptor. A C function pointer really |
| 953 | points to one of these. */ |
| 954 | |
| 955 | typedef struct aix_fd_struct { |
| 956 | void *code_pointer; |
| 957 | void *toc; |
| 958 | } aix_fd; |
| 959 | |
| 960 | /* here I'd like to add the stack frame layout we use in darwin_closure.S |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 961 | and aix_closure.S |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 962 | |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 963 | m32/m64 |
| 964 | |
| 965 | The stack layout looks like this: |
| 966 | |
| 967 | | Additional params... | | Higher address |
| 968 | ~ ~ ~ |
| 969 | | Parameters (at least 8*4/8=32/64) | | NUM_GPR_ARG_REGISTERS |
| 970 | |--------------------------------------------| | |
| 971 | | TOC=R2 (AIX) Reserved (Darwin) 4/8 | | |
| 972 | |--------------------------------------------| | |
| 973 | | Reserved 2*4/8 | | |
| 974 | |--------------------------------------------| | |
| 975 | | Space for callee's LR 4/8 | | |
| 976 | |--------------------------------------------| | |
| 977 | | Saved CR [low word for m64] 4/8 | | |
| 978 | |--------------------------------------------| | |
| 979 | | Current backchain pointer 4/8 |-/ Parent's frame. |
| 980 | |--------------------------------------------| <+ <<< on entry to ffi_closure_ASM |
| 981 | | Result Bytes 16 | | |
| 982 | |--------------------------------------------| | |
| 983 | ~ padding to 16-byte alignment ~ ~ |
| 984 | |--------------------------------------------| | |
| 985 | | NUM_FPR_ARG_REGISTERS slots | | |
| 986 | | here fp13 .. fp1 13*8 | | |
| 987 | |--------------------------------------------| | |
| 988 | | R3..R10 8*4/8=32/64 | | NUM_GPR_ARG_REGISTERS |
| 989 | |--------------------------------------------| | |
| 990 | | TOC=R2 (AIX) Reserved (Darwin) 4/8 | | |
| 991 | |--------------------------------------------| | stack | |
| 992 | | Reserved [compiler,binder] 2*4/8 | | grows | |
| 993 | |--------------------------------------------| | down V |
| 994 | | Space for callee's LR 4/8 | | |
| 995 | |--------------------------------------------| | lower addresses |
| 996 | | Saved CR [low word for m64] 4/8 | | |
| 997 | |--------------------------------------------| | stack pointer here |
| 998 | | Current backchain pointer 4/8 |-/ during |
| 999 | |--------------------------------------------| <<< ffi_closure_ASM. |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1000 | |
| 1001 | */ |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1002 | |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1003 | ffi_status |
Christian Heimes | 7864476 | 2008-03-04 23:39:23 +0000 | [diff] [blame] | 1004 | ffi_prep_closure_loc (ffi_closure* closure, |
| 1005 | ffi_cif* cif, |
| 1006 | void (*fun)(ffi_cif*, void*, void**, void*), |
| 1007 | void *user_data, |
| 1008 | void *codeloc) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1009 | { |
| 1010 | unsigned int *tramp; |
| 1011 | struct ffi_aix_trampoline_struct *tramp_aix; |
| 1012 | aix_fd *fd; |
| 1013 | |
| 1014 | switch (cif->abi) |
| 1015 | { |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1016 | case FFI_DARWIN: |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1017 | |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1018 | FFI_ASSERT (cif->abi == FFI_DARWIN); |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1019 | |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1020 | tramp = (unsigned int *) &closure->tramp[0]; |
| 1021 | #if defined(POWERPC_DARWIN64) |
| 1022 | tramp[0] = 0x7c0802a6; /* mflr r0 */ |
| 1023 | tramp[1] = 0x429f0015; /* bcl- 20,4*cr7+so, +0x18 (L1) */ |
| 1024 | /* We put the addresses here. */ |
| 1025 | tramp[6] = 0x7d6802a6; /*L1: mflr r11 */ |
| 1026 | tramp[7] = 0xe98b0000; /* ld r12,0(r11) function address */ |
| 1027 | tramp[8] = 0x7c0803a6; /* mtlr r0 */ |
| 1028 | tramp[9] = 0x7d8903a6; /* mtctr r12 */ |
| 1029 | tramp[10] = 0xe96b0008; /* lwz r11,8(r11) static chain */ |
| 1030 | tramp[11] = 0x4e800420; /* bctr */ |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1031 | |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1032 | *((unsigned long *)&tramp[2]) = (unsigned long) ffi_closure_ASM; /* function */ |
| 1033 | *((unsigned long *)&tramp[4]) = (unsigned long) codeloc; /* context */ |
| 1034 | #else |
| 1035 | tramp[0] = 0x7c0802a6; /* mflr r0 */ |
| 1036 | tramp[1] = 0x429f000d; /* bcl- 20,4*cr7+so,0x10 */ |
| 1037 | tramp[4] = 0x7d6802a6; /* mflr r11 */ |
| 1038 | tramp[5] = 0x818b0000; /* lwz r12,0(r11) function address */ |
| 1039 | tramp[6] = 0x7c0803a6; /* mtlr r0 */ |
| 1040 | tramp[7] = 0x7d8903a6; /* mtctr r12 */ |
| 1041 | tramp[8] = 0x816b0004; /* lwz r11,4(r11) static chain */ |
| 1042 | tramp[9] = 0x4e800420; /* bctr */ |
| 1043 | tramp[2] = (unsigned long) ffi_closure_ASM; /* function */ |
| 1044 | tramp[3] = (unsigned long) codeloc; /* context */ |
| 1045 | #endif |
| 1046 | closure->cif = cif; |
| 1047 | closure->fun = fun; |
| 1048 | closure->user_data = user_data; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1049 | |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1050 | /* Flush the icache. Only necessary on Darwin. */ |
| 1051 | flush_range(codeloc, FFI_TRAMPOLINE_SIZE); |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1052 | |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1053 | break; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1054 | |
| 1055 | case FFI_AIX: |
| 1056 | |
| 1057 | tramp_aix = (struct ffi_aix_trampoline_struct *) (closure->tramp); |
| 1058 | fd = (aix_fd *)(void *)ffi_closure_ASM; |
| 1059 | |
| 1060 | FFI_ASSERT (cif->abi == FFI_AIX); |
| 1061 | |
| 1062 | tramp_aix->code_pointer = fd->code_pointer; |
| 1063 | tramp_aix->toc = fd->toc; |
Christian Heimes | 7864476 | 2008-03-04 23:39:23 +0000 | [diff] [blame] | 1064 | tramp_aix->static_chain = codeloc; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1065 | closure->cif = cif; |
| 1066 | closure->fun = fun; |
| 1067 | closure->user_data = user_data; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1068 | break; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1069 | |
| 1070 | default: |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1071 | return FFI_BAD_ABI; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1072 | break; |
| 1073 | } |
| 1074 | return FFI_OK; |
| 1075 | } |
| 1076 | |
| 1077 | static void |
| 1078 | flush_icache(char *addr) |
| 1079 | { |
| 1080 | #ifndef _AIX |
| 1081 | __asm__ volatile ( |
| 1082 | "dcbf 0,%0\n" |
| 1083 | "\tsync\n" |
| 1084 | "\ticbi 0,%0\n" |
| 1085 | "\tsync\n" |
| 1086 | "\tisync" |
| 1087 | : : "r"(addr) : "memory"); |
| 1088 | #endif |
| 1089 | } |
| 1090 | |
| 1091 | static void |
| 1092 | flush_range(char * addr1, int size) |
| 1093 | { |
| 1094 | #define MIN_LINE_SIZE 32 |
| 1095 | int i; |
| 1096 | for (i = 0; i < size; i += MIN_LINE_SIZE) |
| 1097 | flush_icache(addr1+i); |
| 1098 | flush_icache(addr1+size-1); |
| 1099 | } |
| 1100 | |
| 1101 | typedef union |
| 1102 | { |
| 1103 | float f; |
| 1104 | double d; |
| 1105 | } ffi_dblfl; |
| 1106 | |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1107 | ffi_type * |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1108 | ffi_closure_helper_DARWIN (ffi_closure *, void *, |
| 1109 | unsigned long *, ffi_dblfl *); |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1110 | |
| 1111 | /* Basically the trampoline invokes ffi_closure_ASM, and on |
| 1112 | entry, r11 holds the address of the closure. |
| 1113 | After storing the registers that could possibly contain |
| 1114 | parameters to be passed into the stack frame and setting |
| 1115 | up space for a return value, ffi_closure_ASM invokes the |
| 1116 | following helper function to do most of the work. */ |
| 1117 | |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1118 | ffi_type * |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1119 | ffi_closure_helper_DARWIN (ffi_closure *closure, void *rvalue, |
| 1120 | unsigned long *pgr, ffi_dblfl *pfr) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1121 | { |
| 1122 | /* rvalue is the pointer to space for return value in closure assembly |
| 1123 | pgr is the pointer to where r3-r10 are stored in ffi_closure_ASM |
| 1124 | pfr is the pointer to where f1-f13 are stored in ffi_closure_ASM. */ |
| 1125 | |
| 1126 | typedef double ldbits[2]; |
| 1127 | |
| 1128 | union ldu |
| 1129 | { |
| 1130 | ldbits lb; |
| 1131 | long double ld; |
| 1132 | }; |
| 1133 | |
| 1134 | void ** avalue; |
| 1135 | ffi_type ** arg_types; |
| 1136 | long i, avn; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1137 | ffi_cif * cif; |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1138 | ffi_dblfl * end_pfr = pfr + NUM_FPR_ARG_REGISTERS; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1139 | unsigned size_al; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1140 | #if defined(POWERPC_DARWIN64) |
| 1141 | unsigned fpsused = 0; |
| 1142 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1143 | |
| 1144 | cif = closure->cif; |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1145 | avalue = alloca (cif->nargs * sizeof(void *)); |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1146 | |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1147 | if (cif->rtype->type == FFI_TYPE_STRUCT) |
| 1148 | { |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1149 | #if defined(POWERPC_DARWIN64) |
| 1150 | if (!darwin64_struct_ret_by_value_p (cif->rtype)) |
| 1151 | { |
| 1152 | /* Won't fit into the regs - return by ref. */ |
| 1153 | rvalue = (void *) *pgr; |
| 1154 | pgr++; |
| 1155 | } |
| 1156 | #elif defined(DARWIN_PPC) |
| 1157 | if (cif->rtype->size > 4) |
| 1158 | { |
| 1159 | rvalue = (void *) *pgr; |
| 1160 | pgr++; |
| 1161 | } |
| 1162 | #else /* assume we return by ref. */ |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1163 | rvalue = (void *) *pgr; |
| 1164 | pgr++; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1165 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1166 | } |
| 1167 | |
| 1168 | i = 0; |
| 1169 | avn = cif->nargs; |
| 1170 | arg_types = cif->arg_types; |
| 1171 | |
| 1172 | /* Grab the addresses of the arguments from the stack frame. */ |
| 1173 | while (i < avn) |
| 1174 | { |
| 1175 | switch (arg_types[i]->type) |
| 1176 | { |
| 1177 | case FFI_TYPE_SINT8: |
| 1178 | case FFI_TYPE_UINT8: |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1179 | #if defined(POWERPC64) |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1180 | avalue[i] = (char *) pgr + 7; |
| 1181 | #else |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1182 | avalue[i] = (char *) pgr + 3; |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1183 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1184 | pgr++; |
| 1185 | break; |
| 1186 | |
| 1187 | case FFI_TYPE_SINT16: |
| 1188 | case FFI_TYPE_UINT16: |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1189 | #if defined(POWERPC64) |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1190 | avalue[i] = (char *) pgr + 6; |
| 1191 | #else |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1192 | avalue[i] = (char *) pgr + 2; |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1193 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1194 | pgr++; |
| 1195 | break; |
| 1196 | |
| 1197 | case FFI_TYPE_SINT32: |
| 1198 | case FFI_TYPE_UINT32: |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1199 | #if defined(POWERPC64) |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1200 | avalue[i] = (char *) pgr + 4; |
| 1201 | #else |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1202 | case FFI_TYPE_POINTER: |
| 1203 | avalue[i] = pgr; |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1204 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1205 | pgr++; |
| 1206 | break; |
| 1207 | |
| 1208 | case FFI_TYPE_STRUCT: |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1209 | size_al = arg_types[i]->size; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1210 | #if defined(POWERPC_DARWIN64) |
| 1211 | pgr = (unsigned long *)ALIGN((char *)pgr, arg_types[i]->alignment); |
| 1212 | if (size_al < 3 || size_al == 4) |
| 1213 | { |
| 1214 | avalue[i] = ((char *)pgr)+8-size_al; |
| 1215 | if (arg_types[i]->elements[0]->type == FFI_TYPE_FLOAT |
| 1216 | && fpsused < NUM_FPR_ARG_REGISTERS) |
| 1217 | { |
| 1218 | *(float *)pgr = (float) *(double *)pfr; |
| 1219 | pfr++; |
| 1220 | fpsused++; |
| 1221 | } |
| 1222 | } |
| 1223 | else |
| 1224 | { |
| 1225 | if (size_al != 16) |
| 1226 | pfr = (ffi_dblfl *) |
| 1227 | darwin64_struct_floats_to_mem (arg_types[i], (char *)pgr, |
| 1228 | (double *)pfr, &fpsused); |
| 1229 | avalue[i] = pgr; |
| 1230 | } |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1231 | pgr += (size_al + 7) / 8; |
| 1232 | #else |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1233 | /* If the first member of the struct is a double, then align |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1234 | the struct to double-word. */ |
| 1235 | if (arg_types[i]->elements[0]->type == FFI_TYPE_DOUBLE) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1236 | size_al = ALIGN(arg_types[i]->size, 8); |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1237 | # if defined(POWERPC64) |
| 1238 | FFI_ASSERT (cif->abi != FFI_DARWIN); |
| 1239 | avalue[i] = pgr; |
| 1240 | pgr += (size_al + 7) / 8; |
| 1241 | # else |
| 1242 | /* Structures that match the basic modes (QI 1 byte, HI 2 bytes, |
| 1243 | SI 4 bytes) are aligned as if they were those modes. */ |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1244 | if (size_al < 3 && cif->abi == FFI_DARWIN) |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1245 | avalue[i] = (char*) pgr + 4 - size_al; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1246 | else |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1247 | avalue[i] = pgr; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1248 | pgr += (size_al + 3) / 4; |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1249 | # endif |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1250 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1251 | break; |
| 1252 | |
| 1253 | case FFI_TYPE_SINT64: |
| 1254 | case FFI_TYPE_UINT64: |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1255 | #if defined(POWERPC64) |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1256 | case FFI_TYPE_POINTER: |
| 1257 | avalue[i] = pgr; |
| 1258 | pgr++; |
| 1259 | break; |
| 1260 | #else |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1261 | /* Long long ints are passed in two gpr's. */ |
| 1262 | avalue[i] = pgr; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1263 | pgr += 2; |
| 1264 | break; |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1265 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1266 | |
| 1267 | case FFI_TYPE_FLOAT: |
| 1268 | /* A float value consumes a GPR. |
| 1269 | There are 13 64bit floating point registers. */ |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1270 | if (pfr < end_pfr) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1271 | { |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1272 | double temp = pfr->d; |
| 1273 | pfr->f = (float) temp; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1274 | avalue[i] = pfr; |
| 1275 | pfr++; |
| 1276 | } |
| 1277 | else |
| 1278 | { |
| 1279 | avalue[i] = pgr; |
| 1280 | } |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1281 | pgr++; |
| 1282 | break; |
| 1283 | |
| 1284 | case FFI_TYPE_DOUBLE: |
| 1285 | /* A double value consumes two GPRs. |
| 1286 | There are 13 64bit floating point registers. */ |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1287 | if (pfr < end_pfr) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1288 | { |
| 1289 | avalue[i] = pfr; |
| 1290 | pfr++; |
| 1291 | } |
| 1292 | else |
| 1293 | { |
| 1294 | avalue[i] = pgr; |
| 1295 | } |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1296 | #ifdef POWERPC64 |
| 1297 | pgr++; |
| 1298 | #else |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1299 | pgr += 2; |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1300 | #endif |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1301 | break; |
| 1302 | |
| 1303 | #if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE |
| 1304 | |
| 1305 | case FFI_TYPE_LONGDOUBLE: |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1306 | #ifdef POWERPC64 |
| 1307 | if (pfr + 1 < end_pfr) |
| 1308 | { |
| 1309 | avalue[i] = pfr; |
| 1310 | pfr += 2; |
| 1311 | } |
| 1312 | else |
| 1313 | { |
| 1314 | if (pfr < end_pfr) |
| 1315 | { |
| 1316 | *pgr = *(unsigned long *) pfr; |
| 1317 | pfr++; |
| 1318 | } |
| 1319 | avalue[i] = pgr; |
| 1320 | } |
| 1321 | pgr += 2; |
| 1322 | #else /* POWERPC64 */ |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1323 | /* A long double value consumes four GPRs and two FPRs. |
| 1324 | There are 13 64bit floating point registers. */ |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1325 | if (pfr + 1 < end_pfr) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1326 | { |
| 1327 | avalue[i] = pfr; |
| 1328 | pfr += 2; |
| 1329 | } |
| 1330 | /* Here we have the situation where one part of the long double |
| 1331 | is stored in fpr13 and the other part is already on the stack. |
| 1332 | We use a union to pass the long double to avalue[i]. */ |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1333 | else if (pfr + 1 == end_pfr) |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1334 | { |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1335 | union ldu temp_ld; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1336 | memcpy (&temp_ld.lb[0], pfr, sizeof(ldbits)); |
| 1337 | memcpy (&temp_ld.lb[1], pgr + 2, sizeof(ldbits)); |
| 1338 | avalue[i] = &temp_ld.ld; |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1339 | pfr++; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1340 | } |
| 1341 | else |
| 1342 | { |
| 1343 | avalue[i] = pgr; |
| 1344 | } |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1345 | pgr += 4; |
Matthias Klose | a834975 | 2010-03-15 13:25:28 +0000 | [diff] [blame] | 1346 | #endif /* POWERPC64 */ |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1347 | break; |
| 1348 | #endif |
| 1349 | default: |
| 1350 | FFI_ASSERT(0); |
| 1351 | } |
| 1352 | i++; |
| 1353 | } |
| 1354 | |
| 1355 | (closure->fun) (cif, rvalue, avalue, closure->user_data); |
| 1356 | |
| 1357 | /* Tell ffi_closure_ASM to perform return type promotions. */ |
doko@ubuntu.com | 2a91876 | 2012-06-26 17:56:44 +0200 | [diff] [blame] | 1358 | return cif->rtype; |
Thomas Heller | d4c9320 | 2006-03-08 19:35:11 +0000 | [diff] [blame] | 1359 | } |