From: Ian Munsie <imun...@au1.ibm.com> Certain system calls on PowerPC access to the registers through a 7th parameter, which will not fit into the model of the existing SYSCALL_DEFINE macros.
This patch a new class of macros to handle this situation, recording the metadata required for ftrace syscalls but still using the correct syntax to place the registers in the 7th parameter. Signed-off-by: Ian Munsie <imun...@au1.ibm.com> --- arch/powerpc/include/asm/syscalls.h | 54 +++++++++++++++++++++++++++++++++++ 1 files changed, 54 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/include/asm/syscalls.h b/arch/powerpc/include/asm/syscalls.h index be37ef8..72badaa 100644 --- a/arch/powerpc/include/asm/syscalls.h +++ b/arch/powerpc/include/asm/syscalls.h @@ -5,12 +5,66 @@ #include <linux/compiler.h> #include <linux/linkage.h> #include <linux/types.h> +#include <linux/syscalls.h> #include <asm/signal.h> struct pt_regs; struct rtas_args; struct sigaction; +#define __SC_DUMMY_ARGS0 unsigned long __dummy_arg_1, __SC_DUMMY_ARGS1 +#define __SC_DUMMY_ARGS1 unsigned long __dummy_arg_2, __SC_DUMMY_ARGS2 +#define __SC_DUMMY_ARGS2 unsigned long __dummy_arg_3, __SC_DUMMY_ARGS3 +#define __SC_DUMMY_ARGS3 unsigned long __dummy_arg_4, __SC_DUMMY_ARGS4 +#define __SC_DUMMY_ARGS4 unsigned long __dummy_arg_5, __SC_DUMMY_ARGS5 +#define __SC_DUMMY_ARGS5 unsigned long __dummy_arg_6, __SC_DUMMY_ARGS6 +#define __SC_DUMMY_ARGS6 + +/* Native syscalls that require register access */ +#define PPC_REGS_SYSCALL_DEFINE1_RET(ret, name, regs, ...) PPC_REGS_SYSCALL_DEFINEx(1, ret, sys_##name, _##name, regs, __VA_ARGS__) +#define PPC_REGS_SYSCALL_DEFINE2_RET(ret, name, regs, ...) PPC_REGS_SYSCALL_DEFINEx(2, ret, sys_##name, _##name, regs, __VA_ARGS__) +#define PPC_REGS_SYSCALL_DEFINE3_RET(ret, name, regs, ...) PPC_REGS_SYSCALL_DEFINEx(3, ret, sys_##name, _##name, regs, __VA_ARGS__) +#define PPC_REGS_SYSCALL_DEFINE4_RET(ret, name, regs, ...) PPC_REGS_SYSCALL_DEFINEx(4, ret, sys_##name, _##name, regs, __VA_ARGS__) +#define PPC_REGS_SYSCALL_DEFINE5_RET(ret, name, regs, ...) PPC_REGS_SYSCALL_DEFINEx(5, ret, sys_##name, _##name, regs, __VA_ARGS__) +#define PPC_REGS_SYSCALL_DEFINE6_RET(ret, name, regs, ...) PPC_REGS_SYSCALL_DEFINEx(6, ret, sys_##name, _##name, regs, __VA_ARGS__) + +#ifdef CONFIG_COMPAT + +/* 32bit compat syscalls that require register access */ +#define PPC_REGS_COMPAT_SYSCALL_DEFINE1_RET(ret, name, regs, ...) PPC_REGS_COMPAT_SYSCALL_DEFINEx(1, ret, compat_sys_##name, name, regs, __VA_ARGS__) +#define PPC_REGS_COMPAT_SYSCALL_DEFINE2_RET(ret, name, regs, ...) PPC_REGS_COMPAT_SYSCALL_DEFINEx(2, ret, compat_sys_##name, name, regs, __VA_ARGS__) +#define PPC_REGS_COMPAT_SYSCALL_DEFINE3_RET(ret, name, regs, ...) PPC_REGS_COMPAT_SYSCALL_DEFINEx(3, ret, compat_sys_##name, name, regs, __VA_ARGS__) +#define PPC_REGS_COMPAT_SYSCALL_DEFINE4_RET(ret, name, regs, ...) PPC_REGS_COMPAT_SYSCALL_DEFINEx(4, ret, compat_sys_##name, name, regs, __VA_ARGS__) +#define PPC_REGS_COMPAT_SYSCALL_DEFINE5_RET(ret, name, regs, ...) PPC_REGS_COMPAT_SYSCALL_DEFINEx(5, ret, compat_sys_##name, name, regs, __VA_ARGS__) +#define PPC_REGS_COMPAT_SYSCALL_DEFINE6_RET(ret, name, regs, ...) PPC_REGS_COMPAT_SYSCALL_DEFINEx(6, ret, compat_sys_##name, name, regs, __VA_ARGS__) + +#define PPC_REGS_COMPAT_SYSCALL_DEFINEx(x, ret, sysname, sname, regs, ...) \ + SYSCALL_METADATAx(sysname, compat_sys_##sname, x, compat_syscall, __VA_ARGS__);\ + __PPC_REGS_SYSCALL_DEFINEx(x, ret, sysname, regs, __VA_ARGS__) + +#define PPC_REGS_COMPAT_SYSCALL_DEFINE0_RET(ret, name, regs) \ + SYSCALL_METADATA0(compat_sys_##name, name, syscall) \ + __PPC_REGS_SYSCALL_DEFINE0(ret, compat_sys_##name, regs) + +#endif /*CONFIG_COMPAT */ + +#define PPC_REGS_SYSCALL_DEFINEx(x, ret, sysname, sname, regs, ...) \ + SYSCALL_METADATAx(sysname, sname, x, syscall, __VA_ARGS__); \ + __PPC_REGS_SYSCALL_DEFINEx(x, ret, sysname, regs, __VA_ARGS__) + +#define PPC_REGS_SYSCALL_DEFINE0_RET(ret, name, regs) \ + SYSCALL_METADATA0(sys_##name, name, syscall) \ + __PPC_REGS_SYSCALL_DEFINE0(ret, sys_##name, regs) + +#define __PPC_REGS_SYSCALL_DEFINEx(x, ret, sysname, regs, ...) \ + ret sysname(__SC_DECL##x(__VA_ARGS__), \ + __SC_DUMMY_ARGS##x \ + struct pt_regs *regs) + +#define __PPC_REGS_SYSCALL_DEFINE0(ret, sysname, regs) \ + ret sysname(__SC_DUMMY_ARGS0 struct pt_regs *regs) + + asmlinkage unsigned long sys_mmap(unsigned long addr, size_t len, unsigned long prot, unsigned long flags, unsigned long fd, off_t offset); -- 1.7.1 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev