marfrit
00d655187a
Three small functions extracted from the v1.19 conservative blob with
ground-truth C and per-tool (Ghidra / retdec / decomp.me) docs:
01_memset — byte memset, 28 B
02_memcpy32 — word-aligned memcpy, 36 B
03_magic_memset — magic check + tail-call to memset, 40 B
04_train_phy_block — first real poll-site function (104 B, 26 insts),
contains poll sites 12-15
Results in RESULTS.md:
- Ghidra: A on all four. Auto-decompile is close to final.
- retdec: A on #3, F on #1 and #2 (no register-arg inference on raw),
C on #4 (mistakes & 0xF0000000 for < 0x10000000).
GRIND_LOG.md (in 04_train_phy_block/) records the matching-decomp
iteration: 116-byte candidate.c at -Os vs vendor 104 bytes = 89.7%
size match on first real iteration. Remaining gap is GCC's choice of
`cmp w, w_const; b.ls` over vendor's `tst w, #imm; b.eq` for the
mask tests.
gdb_debug/ holds a native-aarch64 GDB single-stepper for the three
benchmark functions — boltzmann smoke test passed (memset:
buf[10] 0x00→0xab).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
39 lines
807 B
C
39 lines
807 B
C
//
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// This file was generated by the Retargetable Decompiler
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// Website: https://retdec.com
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//
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#include <stdint.h>
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// ------------------- Function Prototypes --------------------
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int64_t entry_point(void);
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// ------------------------ Functions -------------------------
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// Address range: 0x1200 - 0x1224
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int64_t entry_point(void) {
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// 0x1200
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int64_t result; // 0x1200
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int64_t v1 = result & 0xfffffffc; // 0x1200
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if (v1 == 0) {
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// 0x1210
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return result;
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}
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int64_t v2 = 0;
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int64_t v3 = v2 + 4; // 0x121c
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while (v3 != v1) {
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// 0x1214
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v2 = v3;
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v3 = v2 + 4;
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}
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// 0x1210
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return result;
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}
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// --------------------- Meta-Information ---------------------
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// Detected compiler/packer: starforce (3.x)
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// Detected functions: 1
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