tm_cgpr_get(9)

💅 tm_cgpr_get(9) — a Kernel API Manual moment

okay bestie, welcome to tm_cgpr_get(9), straight out of the Kernel API Manual ✨ this one's a lil niche but it's giving main character energy for real 🎀

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✨ NAME ✨

tm_cgpr_get — get CGPR registers 🫶

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🌸 SYNOPSIS 🌸

int tm_cgpr_get (struct task_struct *target , const struct user_regset
*regset , struct membuf to );

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🦋 ARGUMENTS 🦋

• target — the target task, iykyk 👑
• regset — the user regset structure
• to — destination of copy, that's where the good stuff goes 💌

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💖 DESCRIPTION 💖

so this function gets transaction checkpointed GPR registers. literally what it says on the tin 💅

when the transaction is active, ckpt_regs holds all the checkpointed GPR register values for the current transaction to fall back on if it aborts in between 😭 (yes, the safety net era). this function gets those checkpointed GPR registers. no cap.

the userspace interface buffer layout is literally this:

struct data { struct pt_regs ckpt_regs; };

not me obsessed with a one-line struct 🍓

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🌈 SEE ALSO 🌈

kernel file ./arch/powerpc/kernel/ptrace/ptrace-tm.c + the whole friend group 💜:

• tm_cgpr_active(9)
• tm_cfpr_active(9)
• tm_cfpr_get(9)
• tm_cfpr_set(9)
• tm_cvmx_active(9)
• tm_cvmx_get(9)
• tm_cvmx_set(9)
• tm_cvsx_active(9)
• tm_cvsx_get(9)
• tm_cvsx_set(9)
• tm_spr_active(9)
• tm_spr_get(9)
• tm_spr_set(9)

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🧚 and that's the whole page, bestie — go read some registers, slay 💀🔥

⭐ sign-off time: this lil masterpiece lives in ./arch/powerpc/kernel/ptrace, dated October 2026, and it's called tm_cgpr_get(9) in case you forgot already 🙈 periodt 💅🎀