RFR: 8285303: riscv: Incorrect register mask in call_native_base

[Feilong Jiang]

On Fri, 22 Apr 2022 03:14:56 GMT, Yadong Wang <yadongwang at openjdk.org> wrote:

>> In `MacroAssembler::call_native_base`, t0 and xmethod should be saved as expected:
>> 
>> 
>> void MacroAssembler::call_native_base(address entry_point, Label *retaddr) {
>>   Label E, L;
>>   int32_t offset = 0;
>>   push_reg(0x80000040, sp); // push << t0 & xmethod >> to sp
>>   movptr_with_offset(t0, entry_point, offset);
>>   jalr(x1, t0, offset);
>>   if (retaddr != NULL) {
>>     bind(*retaddr);
>>   }
>>   pop_reg(0x80000040, sp); // pop << t0 & xmethod >> from sp
>> }
>> 
>> 
>> Register mask of '0x80000040' operates << t1 & xmethod >> here, which should be '0x80000020' for << t0 & xmethod >>.
>> 
>> This PR also removes `MacroAssembler::call_native_base` and `MacroAssembler::call_native_base`, expands the definitions of `call_native_base` to `MacroAssembler::call_VM_leaf_base` directly.
>> 
>> Linux RISCV64 release hotspot/jdk tier1 tests are passed on QEMU.
>
> lgtm

@yadongw @RealFYang -- Thank you for the reviews.

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PR: https://git.openjdk.java.net/jdk/pull/8353