arch/powerpc/include/asm/syscalls_32.h

Source file repositories/reference/linux-study-clean/arch/powerpc/include/asm/syscalls_32.h

File Facts

System
Linux kernel
Corpus path
arch/powerpc/include/asm/syscalls_32.h
Extension
.h
Size
1618 bytes
Lines
61
Domain
Architecture Layer
Bucket
arch/powerpc
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.

Dependency Surface

Detected Declarations

Annotated Snippet

struct pt_regs32 {
	unsigned int gpr[32];
	unsigned int nip;
	unsigned int msr;
	unsigned int orig_gpr3;		/* Used for restarting system calls */
	unsigned int ctr;
	unsigned int link;
	unsigned int xer;
	unsigned int ccr;
	unsigned int mq;		/* 601 only (not used at present) */
	unsigned int trap;		/* Reason for being here */
	unsigned int dar;		/* Fault registers */
	unsigned int dsisr;
	unsigned int result;		/* Result of a system call */
};

struct sigcontext32 {
	unsigned int	_unused[4];
	int		signal;
	compat_uptr_t	handler;
	unsigned int	oldmask;
	compat_uptr_t	regs;  /* 4 byte pointer to the pt_regs32 structure. */
};

struct mcontext32 {
	elf_gregset_t32		mc_gregs;
	elf_fpregset_t		mc_fregs;
	unsigned int		mc_pad[2];
	elf_vrregset_t32	mc_vregs __attribute__((__aligned__(16)));
	elf_vsrreghalf_t32      mc_vsregs __attribute__((__aligned__(16)));
};

struct ucontext32 { 
	unsigned int	  	uc_flags;
	unsigned int 	  	uc_link;
	compat_stack_t	 	uc_stack;
	int		 	uc_pad[7];
	compat_uptr_t		uc_regs;	/* points to uc_mcontext field */
	compat_sigset_t	 	uc_sigmask;	/* mask last for extensibility */
	/* glibc has 1024-bit signal masks, ours are 64-bit */
	int		 	uc_maskext[30];
	int		 	uc_pad2[3];
	struct mcontext32	uc_mcontext;
};

#endif  // _ASM_POWERPC_SYSCALLS_32_H

Annotation

Implementation Notes