69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
#include <stdint.h>
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#include <stdio.h>
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#include "misc.h"
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#include "mpconfig.h"
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#include "gc.h"
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#if MICROPY_ENABLE_GC
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extern void *stack_top;
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// We capture here callee-save registers, i.e. ones which may contain
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// interesting values held there by our callers. It doesn't make sense
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// to capture caller-saved registers, because they, well, put on the
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// stack already by the caller.
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#ifdef __x86_64__
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typedef machine_uint_t regs_t[6];
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void gc_helper_get_regs(regs_t arr) {
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register long rbx asm ("rbx");
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register long rbp asm ("rbp");
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register long r12 asm ("r12");
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register long r13 asm ("r13");
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register long r14 asm ("r14");
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register long r15 asm ("r15");
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arr[0] = rbx;
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arr[1] = rbp;
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arr[2] = r12;
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arr[3] = r13;
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arr[4] = r14;
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arr[5] = r15;
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}
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#endif
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#ifdef __i386__
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typedef machine_uint_t regs_t[4];
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void gc_helper_get_regs(regs_t arr) {
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register long ebx asm ("ebx");
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register long esi asm ("esi");
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register long edi asm ("edi");
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register long ebp asm ("ebp");
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arr[0] = ebx;
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arr[1] = esi;
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arr[2] = edi;
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arr[3] = ebp;
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}
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#endif
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void gc_collect(void) {
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//gc_dump_info();
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gc_collect_start();
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// this traces .data and .bss sections
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extern char __bss_start, _end;
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//printf(".bss: %p-%p\n", &__bss_start, &_end);
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gc_collect_root((void**)&__bss_start, ((uint32_t)&_end - (uint32_t)&__bss_start) / sizeof(uint32_t));
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regs_t regs;
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gc_helper_get_regs(regs);
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// GC stack (and regs because we captured them)
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gc_collect_root((void**)®s, ((uint32_t)stack_top - (uint32_t)®s) / sizeof(uint32_t));
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gc_collect_end();
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//printf("-----\n");
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//gc_dump_info();
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}
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#endif //MICROPY_ENABLE_GC
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