arch/openrisc/include/asm/syscall.h

File Facts

System

Linux kernel

Corpus path

arch/openrisc/include/asm/syscall.h

Extension

.h

Size

1777 bytes

Lines

78

Domain

Architecture Layer

Bucket

arch/openrisc

Inferred role

Architecture Layer: syscall or user/kernel boundary

Status

core 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 participates in a user/kernel boundary; inspect argument validation, copy_from_user/copy_to_user, credentials, and dispatch target.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• uapi/linux/audit.h
• linux/err.h
• linux/sched.h

Detected Declarations

• function Copyright
• function syscall_set_nr
• function syscall_rollback
• function syscall_get_error
• function syscall_get_return_value
• function syscall_set_return_value
• function syscall_get_arguments
• function syscall_set_arguments
• function syscall_get_arch

Annotated Snippet

#ifndef __ASM_OPENRISC_SYSCALL_H__
#define __ASM_OPENRISC_SYSCALL_H__

#include <uapi/linux/audit.h>
#include <linux/err.h>
#include <linux/sched.h>

static inline int
syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
{
	return regs->orig_gpr11;
}

static inline void
syscall_set_nr(struct task_struct *task, struct pt_regs *regs, int nr)
{
	regs->orig_gpr11 = nr;
}

static inline void
syscall_rollback(struct task_struct *task, struct pt_regs *regs)
{
	regs->gpr[11] = regs->orig_gpr11;
}

static inline long
syscall_get_error(struct task_struct *task, struct pt_regs *regs)
{
	return IS_ERR_VALUE(regs->gpr[11]) ? regs->gpr[11] : 0;
}

static inline long
syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
{
	return regs->gpr[11];
}

static inline void
syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
			 int error, long val)
{
	regs->gpr[11] = (long) error ?: val;
}

static inline void
syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
		      unsigned long *args)
{
	memcpy(args, &regs->gpr[3], 6 * sizeof(args[0]));
}

static inline void
syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
		      const unsigned long *args)
{
	memcpy(&regs->gpr[3], args, 6 * sizeof(args[0]));
}

static inline int syscall_get_arch(struct task_struct *task)
{
	return AUDIT_ARCH_OPENRISC;
}
#endif

Annotation

• Immediate include surface: `uapi/linux/audit.h`, `linux/err.h`, `linux/sched.h`.
• Detected declarations: `function Copyright`, `function syscall_set_nr`, `function syscall_rollback`, `function syscall_get_error`, `function syscall_get_return_value`, `function syscall_set_return_value`, `function syscall_get_arguments`, `function syscall_set_arguments`, `function syscall_get_arch`.
• Atlas domain: Architecture Layer / arch/openrisc.
• Implementation status: core 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.