…1257)

no functional changes are intended.

cf.
https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#General-Query-Packets

Enhance the hw bound check reported in #1262:

When registering signal handlers for SIGSEGV & SIGBUS in boundary
check with hardware trap, preserve the previous handlers for signal
SIGSEGV and SIGBUS, and forward the signal to the preserved signal
handlers if it isn't handled by hw bound check.

Remove unnecessary memset after mmap to decrease the number of
page faults, as reported in #1269.

…#1279)

Sub module's auxiliary stack boundary and bottom may be different from
main module's counterpart, so when calling sub module, its aux stack info
should be gotten and set to exec_env firstly, or aux stack overflow and out
of bounds memory access exception may be thrown when calling sub
module's function.
Fix the issue reported in PR #1278.

Fix the issue reported in #1282.
When i32/i64 rotate (rotl/rotr) with 0, the LLVM IRs translated are:
left<<0 | left>>64 and left >>0 | left<<64
The value of left >> 64 and left <<64 in LLVM are treated as poison,
which causes invalid result when executing the aot function.

Directly return left when right is 0 to fix the issue.

The existing validation didn't work as expected; e.g. for address
pool: 8.8.8.8/24 the application had access to the 127.0.0.1 address (which
should not).

Add API wasm_runtime_set_module_inst, per request from #1275

Set noexecstack CXX link flags for wamrc to avoid generating binary
with exec stack.

According to import subtyping validation:
  https://webassembly.github.io/spec/core/valid/types.html#import-subtyping
wasm-c-api needs to check types when linking.

Fix libc-wasi poll_oneoff hang issue
Fix libc-uvwasi environ_get sanity check issue