bct_dump(1)

💅 bct_dump — the tegra BCT disassembly tool, bestie

okay so you found bct_dump(1) from the NVIDIA Tegra BCT Disassembly Tool and honestly? it's giving niche-but-iconic. let's get into it. ✨

🎀 NAME 🎀

bct_dump — the tegra BCT disassembly tool. that's it, that's the whole vibe.

🦋 SYNOPSIS 🦋

bct_dump bctfile

one file, one argument, no drama. we love a low-maintenance queen. 💖

🌸 DESCRIPTION 🌸

so here's the tea, bestie: this program takes a binary Tegra Boot Configuration Table (aka a BCT, iykyk) and disassembles it into a text format — and not just any text format, a text format that's suitable to be compiled with cbootimage(1). it's basically the glow-up pipeline: binary goes in, cute readable text comes out, cbootimage takes it from there. 🔥

👑 Platforms supported

not everyone gets an invite to this party. here's the guest list:

• Tegra20
• Tegra30
• Tegra114
• Tegra124
• Tegra132
• Tegra210

no cap, that's the whole roster. 💅

✨ OPTIONS ✨

just the one, and she serves:

• bctfile — specify the BCT file to disassemble. that's the file you're pulling apart, bestie. give her a name. 🫶

🌈 EXAMPLES 🌈

say you wanna disassemble the BCT file for a Tegra124 Jetson-TK1. periodt, here's how:

$ bct_dump PM375_Hynix_2GB_H5TC4G63AFR_RDA_924MHz.bct
Version       = 0x00400001;
BlockSize     = 0x00004000;
PageSize      = 0x00000200;
PartitionSize = 0x01000000;
OdmData       = 0x800d8000;
JtagCtrl      = 0x00000000;
ChipUid       = 0x00000000000000000000000000000000;
# Bootloader used       = 0;
# Bootloaders max       = 4;
# BCT size              = 8192;
 ...

look at that output. main character energy fr fr. those # lines? comments, bestie, they're just narrating. 😭✨

💀 RETURN VALUE 💀

if any error occurs, a non zero exit status is returned. so like, if it's not 0, something went wrong and you should go check on her. 🙈

🧚 SEE ALSO 🧚

go be nosy, these two are in the group chat too:

• tegrarcm(1)
• cbootimage(1)

⭐ little reminder: bct_dump is the disassembler half of the BCT duo — it reads the binary and spits out text for cbootimage(1), it does not do the compiling itself. keep your lanes, keep your facts. 💜

and that's the whole page, bestie!! this one's from bct_dump-1.8, dated 6 October 2015 — vintage, but she still ate. 🎀🦋💖 slay, bye!!