fix crash in ecp_nistz256_point_add_affine()

The .rodata section with precomputed constant `ecp_nistz256_precomputed` needs to be
terminated by .text, because the ecp_nistz256_precomputed' happens to be the
first section in the file. The lack of .text makes code to arrive into the same
.rodata section where ecp_nistz256_precomputed is found. The exception is raised
as soon as CPU attempts to execute the code from read only section.

Fixes openssl#24184

.github/workflows/windows.yml

@@ -183,3 +183,67 @@ jobs:
 # Disable testing for now. TBD: Need local cygwin installation to debug .
 #    - name: Run openssl tests
 #      run: bash -c "cd openssl && make V=1 test"
+  mingw:
+    # Run a job for each of the specified target architectures:
+    # copied and modified from shared. Instead of installing nasm we
+    # install mingw and cygwin.
+    #
+    strategy:
+      matrix:
+        os:
+          - windows-2022
+        platform:
+          - arch: win64
+            config: enable-tests no-fips
+    runs-on: ${{ github.server_url == 'https://github.com' && matrix.os || format('{0}-self-hosted', matrix.os) }}
+    steps:
+    - uses: actions/checkout@v4
+    - uses: cygwin/cygwin-install-action@master
+      with:
+         packages: perl git make gcc-core gcc
+    - name: Check repo
+      run: cygcheck -V
+    - name: Full cygcheck status
+      run: cygcheck -s -v -r -h
+    - name: Install MinGW
+      uses: egor-tensin/setup-mingw@v2
+      with:
+        platform: x64
+        cygwin: 1
+    - name: prepare the build directory
+      run: mkdir _build
+    - name: config
+      working-directory: _build
+      run: |
+         bash -c "gcc --version && perl ../Configure ${{ matrix.platform.config }}"
+         bash -c "perl configdata.pm --dump"
+    - name: build
+      working-directory: _build
+      run: |
+         bash -c  "make -j 4"
+    - name: save artifacts
+      uses: actions/upload-artifact@v3
+      with:
+        name: "ci@-${{ matrix.os }}"
+        path: _build
+        if-no-files-found: ignore
+        retention-days: 2
+    - name: download coreinfo
+      uses: suisei-cn/actions-download-file@v1.6.0
+      with:
+        url: "https://download.sysinternals.com/files/Coreinfo.zip"
+        target: _build/coreinfo/
+    - name: get cpu info
+      working-directory: _build
+      continue-on-error: true
+      run: |
+        7z.exe x coreinfo/Coreinfo.zip
+        ./Coreinfo64.exe -accepteula -f
+        ./apps/openssl.exe version -c
+    - name: Check platform symbol usage
+      working-directory: _build
+      run: perl ../util/checkplatformsyms.pl ../util/platform_symbols/windows-symbols.txt libcrypto-3-x64.dll ./libssl-3-x64.dll
+    - name: test
+      working-directory: _build
+      run: |
+         bash -c "make test VERBOSE_FAILURE=yes HARNESS_JOBS=4"