From eb48ffcf0e55e511ae87e9d99117d5e2b9e27153 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 26 Sep 2012 19:44:26 -0400 Subject: sparc64: convert to generic execve We still have wrappers, but nowhere near as scary as they used to be. I'm not sure how necessary that flushw is now, TBH... Signed-off-by: Al Viro --- arch/sparc/include/asm/syscalls.h | 2 ++ arch/sparc/include/asm/unistd.h | 1 + arch/sparc/kernel/process_64.c | 29 ----------------------------- arch/sparc/kernel/sys_sparc32.c | 29 ----------------------------- arch/sparc/kernel/syscalls.S | 20 ++++++++------------ arch/sparc/kernel/systbls_64.S | 2 +- 6 files changed, 12 insertions(+), 71 deletions(-) (limited to 'arch/sparc') diff --git a/arch/sparc/include/asm/syscalls.h b/arch/sparc/include/asm/syscalls.h index 45a43f6..4b05df3 100644 --- a/arch/sparc/include/asm/syscalls.h +++ b/arch/sparc/include/asm/syscalls.h @@ -8,6 +8,8 @@ extern asmlinkage long sparc_do_fork(unsigned long clone_flags, struct pt_regs *regs, unsigned long stack_size); +#ifndef __arch64__ extern asmlinkage int sparc_execve(struct pt_regs *regs); +#endif #endif /* _SPARC64_SYSCALLS_H */ diff --git a/arch/sparc/include/asm/unistd.h b/arch/sparc/include/asm/unistd.h index 0ecea6e..32bd0aa 100644 --- a/arch/sparc/include/asm/unistd.h +++ b/arch/sparc/include/asm/unistd.h @@ -45,6 +45,7 @@ #define __ARCH_WANT_COMPAT_SYS_TIME #define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_COMPAT_SYS_SENDFILE +#define __ARCH_WANT_SYS_EXECVE #endif /* diff --git a/arch/sparc/kernel/process_64.c b/arch/sparc/kernel/process_64.c index 55aa68d..6b36e87 100644 --- a/arch/sparc/kernel/process_64.c +++ b/arch/sparc/kernel/process_64.c @@ -667,35 +667,6 @@ int dump_fpu (struct pt_regs * regs, elf_fpregset_t * fpregs) } EXPORT_SYMBOL(dump_fpu); -/* - * sparc_execve() executes a new program after the asm stub has set - * things up for us. This should basically do what I want it to. - */ -asmlinkage int sparc_execve(struct pt_regs *regs) -{ - int error, base = 0; - struct filename *filename; - - /* User register window flush is done by entry.S */ - - /* Check for indirect call. */ - if (regs->u_regs[UREG_G1] == 0) - base = 1; - - filename = getname((char __user *)regs->u_regs[base + UREG_I0]); - error = PTR_ERR(filename); - if (IS_ERR(filename)) - goto out; - error = do_execve(filename->name, - (const char __user *const __user *) - regs->u_regs[base + UREG_I1], - (const char __user *const __user *) - regs->u_regs[base + UREG_I2], regs); - putname(filename); -out: - return error; -} - unsigned long get_wchan(struct task_struct *task) { unsigned long pc, fp, bias = 0; diff --git a/arch/sparc/kernel/sys_sparc32.c b/arch/sparc/kernel/sys_sparc32.c index 2f116ff..03c7e92 100644 --- a/arch/sparc/kernel/sys_sparc32.c +++ b/arch/sparc/kernel/sys_sparc32.c @@ -396,35 +396,6 @@ asmlinkage long compat_sys_rt_sigaction(int sig, return ret; } -/* - * sparc32_execve() executes a new program after the asm stub has set - * things up for us. This should basically do what I want it to. - */ -asmlinkage long sparc32_execve(struct pt_regs *regs) -{ - int error, base = 0; - struct filename *filename; - - /* User register window flush is done by entry.S */ - - /* Check for indirect call. */ - if ((u32)regs->u_regs[UREG_G1] == 0) - base = 1; - - filename = getname(compat_ptr(regs->u_regs[base + UREG_I0])); - error = PTR_ERR(filename); - if (IS_ERR(filename)) - goto out; - - error = compat_do_execve(filename->name, - compat_ptr(regs->u_regs[base + UREG_I1]), - compat_ptr(regs->u_regs[base + UREG_I2]), regs); - - putname(filename); -out: - return error; -} - #ifdef CONFIG_MODULES asmlinkage long sys32_init_module(void __user *umod, u32 len, diff --git a/arch/sparc/kernel/syscalls.S b/arch/sparc/kernel/syscalls.S index f72c124..2ef41e6 100644 --- a/arch/sparc/kernel/syscalls.S +++ b/arch/sparc/kernel/syscalls.S @@ -1,23 +1,19 @@ /* SunOS's execv() call only specifies the argv argument, the * environment settings are the same as the calling processes. */ -sys_execve: - sethi %hi(sparc_execve), %g1 - ba,pt %xcc, execve_merge - or %g1, %lo(sparc_execve), %g1 +sys64_execve: + set sys_execve, %g1 + jmpl %g1, %g0 + flushw #ifdef CONFIG_COMPAT sunos_execv: - stx %g0, [%sp + PTREGS_OFF + PT_V9_I2] + mov %g0, %o2 sys32_execve: - sethi %hi(sparc32_execve), %g1 - or %g1, %lo(sparc32_execve), %g1 -#endif - -execve_merge: - flushw + set compat_sys_execve, %g1 jmpl %g1, %g0 - add %sp, PTREGS_OFF, %o0 + flushw +#endif .align 32 sys_sparc_pipe: diff --git a/arch/sparc/kernel/systbls_64.S b/arch/sparc/kernel/systbls_64.S index 3a58e0d..acad343 100644 --- a/arch/sparc/kernel/systbls_64.S +++ b/arch/sparc/kernel/systbls_64.S @@ -106,7 +106,7 @@ sys_call_table: /*40*/ .word sys_newlstat, sys_dup, sys_sparc_pipe, sys_times, sys_nis_syscall .word sys_umount, sys_setgid, sys_getgid, sys_signal, sys_geteuid /*50*/ .word sys_getegid, sys_acct, sys_memory_ordering, sys_nis_syscall, sys_ioctl - .word sys_reboot, sys_nis_syscall, sys_symlink, sys_readlink, sys_execve + .word sys_reboot, sys_nis_syscall, sys_symlink, sys_readlink, sys64_execve /*60*/ .word sys_umask, sys_chroot, sys_newfstat, sys_fstat64, sys_getpagesize .word sys_msync, sys_vfork, sys_pread64, sys_pwrite64, sys_nis_syscall /*70*/ .word sys_nis_syscall, sys_mmap, sys_nis_syscall, sys_64_munmap, sys_mprotect -- cgit v1.1