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Diffstat (limited to 'lib/utils/gchelper_generic.c')
| -rw-r--r-- | lib/utils/gchelper_generic.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/lib/utils/gchelper_generic.c b/lib/utils/gchelper_generic.c deleted file mode 100644 index 3e7e33ab1..000000000 --- a/lib/utils/gchelper_generic.c +++ /dev/null @@ -1,183 +0,0 @@ -/* - * This file is part of the MicroPython project, http://micropython.org/ - * - * The MIT License (MIT) - * - * Copyright (c) 2013, 2014 Damien P. George - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#include <stdio.h> - -#include "py/mpstate.h" -#include "py/gc.h" -#include "lib/utils/gchelper.h" - -#if MICROPY_ENABLE_GC - -// Even if we have specific support for an architecture, it is -// possible to force use of setjmp-based implementation. -#if !MICROPY_GCREGS_SETJMP - -// We capture here callee-save registers, i.e. ones which may contain -// interesting values held there by our callers. It doesn't make sense -// to capture caller-saved registers, because they, well, put on the -// stack already by the caller. -#if defined(__x86_64__) - -STATIC void gc_helper_get_regs(gc_helper_regs_t arr) { - register long rbx asm ("rbx"); - register long rbp asm ("rbp"); - register long r12 asm ("r12"); - register long r13 asm ("r13"); - register long r14 asm ("r14"); - register long r15 asm ("r15"); - #ifdef __clang__ - // TODO: - // This is dirty workaround for Clang. It tries to get around - // uncompliant (wrt to GCC) behavior of handling register variables. - // Application of this patch here is random, and done only to unbreak - // MacOS build. Better, cross-arch ways to deal with Clang issues should - // be found. - asm ("" : "=r" (rbx)); - asm ("" : "=r" (rbp)); - asm ("" : "=r" (r12)); - asm ("" : "=r" (r13)); - asm ("" : "=r" (r14)); - asm ("" : "=r" (r15)); - #endif - arr[0] = rbx; - arr[1] = rbp; - arr[2] = r12; - arr[3] = r13; - arr[4] = r14; - arr[5] = r15; -} - -#elif defined(__i386__) - -STATIC void gc_helper_get_regs(gc_helper_regs_t arr) { - register long ebx asm ("ebx"); - register long esi asm ("esi"); - register long edi asm ("edi"); - register long ebp asm ("ebp"); - #ifdef __clang__ - // TODO: - // This is dirty workaround for Clang. It tries to get around - // uncompliant (wrt to GCC) behavior of handling register variables. - // Application of this patch here is random, and done only to unbreak - // MacOS build. Better, cross-arch ways to deal with Clang issues should - // be found. - asm ("" : "=r" (ebx)); - asm ("" : "=r" (esi)); - asm ("" : "=r" (edi)); - asm ("" : "=r" (ebp)); - #endif - arr[0] = ebx; - arr[1] = esi; - arr[2] = edi; - arr[3] = ebp; -} - -#elif defined(__thumb2__) || defined(__thumb__) || defined(__arm__) - -// Fallback implementation, prefer gchelper_m0.s or gchelper_m3.s - -STATIC void gc_helper_get_regs(gc_helper_regs_t arr) { - register long r4 asm ("r4"); - register long r5 asm ("r5"); - register long r6 asm ("r6"); - register long r7 asm ("r7"); - register long r8 asm ("r8"); - register long r9 asm ("r9"); - register long r10 asm ("r10"); - register long r11 asm ("r11"); - register long r12 asm ("r12"); - register long r13 asm ("r13"); - arr[0] = r4; - arr[1] = r5; - arr[2] = r6; - arr[3] = r7; - arr[4] = r8; - arr[5] = r9; - arr[6] = r10; - arr[7] = r11; - arr[8] = r12; - arr[9] = r13; -} - -#elif defined(__aarch64__) - -STATIC void gc_helper_get_regs(gc_helper_regs_t arr) { - const register long x19 asm ("x19"); - const register long x20 asm ("x20"); - const register long x21 asm ("x21"); - const register long x22 asm ("x22"); - const register long x23 asm ("x23"); - const register long x24 asm ("x24"); - const register long x25 asm ("x25"); - const register long x26 asm ("x26"); - const register long x27 asm ("x27"); - const register long x28 asm ("x28"); - const register long x29 asm ("x29"); - arr[0] = x19; - arr[1] = x20; - arr[2] = x21; - arr[3] = x22; - arr[4] = x23; - arr[5] = x24; - arr[6] = x25; - arr[7] = x26; - arr[8] = x27; - arr[9] = x28; - arr[10] = x29; -} - -#else - -#error "Architecture not supported for gc_helper_get_regs. Set MICROPY_GCREGS_SETJMP to use the fallback implementation." - -#endif - -#else // !MICROPY_GCREGS_SETJMP - -// Even if we have specific support for an architecture, it is -// possible to force use of setjmp-based implementation. - -STATIC void gc_helper_get_regs(gc_helper_regs_t arr) { - setjmp(arr); -} - -#endif // MICROPY_GCREGS_SETJMP - -// Explicitly mark this as noinline to make sure the regs variable -// is effectively at the top of the stack: otherwise, in builds where -// LTO is enabled and a lot of inlining takes place we risk a stack -// layout where regs is lower on the stack than pointers which have -// just been allocated but not yet marked, and get incorrectly sweeped. -MP_NOINLINE void gc_helper_collect_regs_and_stack(void) { - gc_helper_regs_t regs; - gc_helper_get_regs(regs); - // GC stack (and regs because we captured them) - void **regs_ptr = (void **)(void *)®s; - gc_collect_root(regs_ptr, ((uintptr_t)MP_STATE_THREAD(stack_top) - (uintptr_t)®s) / sizeof(uintptr_t)); -} - -#endif // MICROPY_ENABLE_GC |