arch/arm/probes/kprobes/actions-common.c

File Facts

System

Linux kernel

Corpus path

arch/arm/probes/kprobes/actions-common.c

Extension

.c

Size

4271 bytes

Lines

171

Domain

Architecture Layer

Bucket

arch/arm

Inferred role

Architecture Layer: implementation source

Status

source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/kernel.h
• linux/kprobes.h
• asm/opcodes.h
• core.h

Detected Declarations

• function Copyright
• function simulate_stm1_pc
• function simulate_ldm1_pc
• function emulate_generic_r0_12_noflags
• function emulate_generic_r2_14_noflags
• function emulate_ldm_r3_15
• function kprobe_decode_ldmstm

Annotated Snippet

if (is_ldm && (reglist & 0x8000)) {
			rn -= 3;
			reglist >>= 3;
			handler = emulate_ldm_r3_15;
		}
	}

	if (handler) {
		/* We can emulate the instruction in (possibly) modified form */
		asi->insn[0] = __opcode_to_mem_arm((insn & 0xfff00000) |
						   (rn << 16) | reglist);
		asi->insn_handler = handler;
		return INSN_GOOD;
	}

	/* Fallback to slower simulation... */
	if (reglist & 0x8000)
		handler = is_ldm ? simulate_ldm1_pc : simulate_stm1_pc;
	else
		handler = simulate_ldm1stm1;
	asi->insn_handler = handler;
	return INSN_GOOD_NO_SLOT;
}

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/kprobes.h`, `asm/opcodes.h`, `core.h`.
• Detected declarations: `function Copyright`, `function simulate_stm1_pc`, `function simulate_ldm1_pc`, `function emulate_generic_r0_12_noflags`, `function emulate_generic_r2_14_noflags`, `function emulate_ldm_r3_15`, `function kprobe_decode_ldmstm`.
• Atlas domain: Architecture Layer / arch/arm.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.