segfault on ARM64

[jwhere]

#include <stdio.h>

#include "sljit/sljitLir.h"

typedef void(SLJIT_FUNC* entry)(void);

static void SLJIT_FUNC foo(void* p) {
  (void)(p);
}

int main(int argc, char* argv[]) {

  struct sljit_compiler* compiler = sljit_create_compiler(NULL);

  sljit_emit_enter(compiler, 0, SLJIT_ARGS0V(), 1, 1, 64);

  // stack[16] = 1i64
  sljit_emit_op1(compiler, SLJIT_MOV, SLJIT_MEM1(SLJIT_SP), 16, SLJIT_IMM, 1);
  // stack[24] = 2i64
  sljit_emit_op1(compiler, SLJIT_MOV, SLJIT_MEM1(SLJIT_SP), 24, SLJIT_IMM, 2);

  // stack[0] = 0i64
  sljit_emit_op1(compiler, SLJIT_MOV, SLJIT_MEM1(SLJIT_SP), 0, SLJIT_IMM, 0);
  // stack[8] = &stack[16]
  sljit_get_local_base(compiler, SLJIT_MEM1(SLJIT_SP), 8, 16);

  // foo(&stack[0])
  sljit_get_local_base(compiler, SLJIT_R0, 0, 0);
  sljit_emit_icall(compiler, SLJIT_CALL, SLJIT_ARGS1V(P), SLJIT_IMM, SLJIT_FUNC_ADDR(foo));
  sljit_emit_return_void(compiler);

  entry f = (entry)sljit_generate_code(compiler, 0, NULL);
  f();

  sljit_free_code(f, NULL);
  sljit_free_compiler(compiler);

}

The above code works fine on X86_64 but causes a segfault on ARM64

[zherczeg]

Thank you for the report. It looks like sljit_get_local_base was bad on ARM64. #282 fixed it.