Justin Mitchell
a86a644adc
Split heap gate into separate free-memory (50KB) and largest-block (20KB) thresholds based on field measurements. Enable wolfSSL single-precision ECC to use fixed 256-bit arrays instead of heap-allocated fast-math bignums, reducing TLS handshake memory footprint. Reclaim ~7KB by right-sizing ESP timer task stacks and move WiFi code out of IRAM to free ~25-30KB for heap. Add memory audit landmarks for font and EPUB allocations.
34 lines
964 B
Python
34 lines
964 B
Python
from pathlib import Path
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Import("env")
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PROJECT_DIR = Path(env.subst("$PROJECT_DIR"))
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MARKER = "/* CrossPoint wolfSSL compatibility overrides */"
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OVERRIDES = f"""
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{MARKER}
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#undef NO_DH
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#ifndef HAVE_FFDHE_2048
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#define HAVE_FFDHE_2048
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#endif
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/* MEMFIX-PORT: 8192 handles up to RSA-4096 keys (the public-CA maximum,
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ISRG Root X1 included) with half the per-bignum heap of 16384: with
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WOLFSSL_SMALL_STACK each fast-math temp is FP_MAX_BITS/8 * 2 bytes on the
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heap, and TLS cert verification allocates dozens at once. */
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#undef FP_MAX_BITS
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#define FP_MAX_BITS 8192
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"""
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def patch_user_settings(path: Path) -> None:
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text = path.read_text()
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if MARKER in text:
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text = text.split(MARKER, 1)[0].rstrip()
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path.write_text(text + OVERRIDES + "\n")
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print(f"Patched wolfSSL settings: {path.relative_to(PROJECT_DIR)}")
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for settings in PROJECT_DIR.glob(".pio/libdeps/*/Arduino-wolfSSL/src/user_settings.h"):
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patch_user_settings(settings)
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