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new function offset gimple

This commit is contained in:
fanfuqiang 2018-09-28 10:11:58 +08:00
parent 8f27146c81
commit 99d6a2907b
1 changed files with 17 additions and 6 deletions
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23
src/rap_plugin/rap-fe-cfi.c
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@ -319,21 +319,32 @@ build_cfi_hash_tree (gimple cs, int direct)
/* This code fragment of compute target function hash offset comes
from Pax RAP. */
/* We need the forward offset. */
if (UNITS_PER_WORD == 8)
target_offset = 2 * sizeof(rap_hash_value_type);
{
target_offset = - 2 * sizeof(rap_hash_value_type);
type = long_integer_type_node;
}
else if (UNITS_PER_WORD == 4)
target_offset = sizeof(rap_hash_value_type);
{
target_offset = - sizeof(rap_hash_value_type);
type = integer_type_node;
}
else
gcc_unreachable();
/* Build the tree for : ((rap_hash_value_type *)target_function - 1)
This code is referenced from gcc source: gimplify_modify_expr_rhs() */
// integer_ptr_type_node
// func is the function pointer, ADDR_EXPR, pointer(function)
fold_build2 (MEM_REF, type, func,
build_int_cst_wide (integer_ptr_type_node,
TREE_INT_CST_LOW (target_offset),
TREE_INT_CST_HIGH (target_offset)));
}
}