From 30286ef6e044bc3d9019c3d8b900572e3fa05e65 Mon Sep 17 00:00:00 2001 From: Paul Mackerras Date: Mon, 17 Oct 2005 20:10:13 +1000 Subject: powerpc: Merge syscalls.c and sys_ppc32.c. Signed-off-by: Paul Mackerras --- arch/powerpc/kernel/syscalls.c | 351 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 351 insertions(+) create mode 100644 arch/powerpc/kernel/syscalls.c (limited to 'arch/powerpc/kernel/syscalls.c') diff --git a/arch/powerpc/kernel/syscalls.c b/arch/powerpc/kernel/syscalls.c new file mode 100644 index 000000000000..3e3a4f67de96 --- /dev/null +++ b/arch/powerpc/kernel/syscalls.c @@ -0,0 +1,351 @@ +/* + * Implementation of various system calls for Linux/PowerPC + * + * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) + * + * Derived from "arch/i386/kernel/sys_i386.c" + * Adapted from the i386 version by Gary Thomas + * Modified by Cort Dougan (cort@cs.nmt.edu) + * and Paul Mackerras (paulus@cs.anu.edu.au). + * + * This file contains various random system calls that + * have a non-standard calling sequence on the Linux/PPC + * platform. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +extern unsigned long wall_jiffies; + + +/* + * sys_ipc() is the de-multiplexer for the SysV IPC calls.. + * + * This is really horribly ugly. + */ +int sys_ipc(uint call, int first, unsigned long second, long third, + void __user *ptr, long fifth) +{ + int version, ret; + + version = call >> 16; /* hack for backward compatibility */ + call &= 0xffff; + + ret = -ENOSYS; + switch (call) { + case SEMOP: + ret = sys_semtimedop(first, (struct sembuf __user *)ptr, + (unsigned)second, NULL); + break; + case SEMTIMEDOP: + ret = sys_semtimedop(first, (struct sembuf __user *)ptr, + (unsigned)second, + (const struct timespec __user *) fifth); + break; + case SEMGET: + ret = sys_semget (first, (int)second, third); + break; + case SEMCTL: { + union semun fourth; + + ret = -EINVAL; + if (!ptr) + break; + if ((ret = get_user(fourth.__pad, (void __user * __user *)ptr))) + break; + ret = sys_semctl(first, (int)second, third, fourth); + break; + } + case MSGSND: + ret = sys_msgsnd(first, (struct msgbuf __user *)ptr, + (size_t)second, third); + break; + case MSGRCV: + switch (version) { + case 0: { + struct ipc_kludge tmp; + + ret = -EINVAL; + if (!ptr) + break; + if ((ret = copy_from_user(&tmp, + (struct ipc_kludge __user *) ptr, + sizeof (tmp)) ? -EFAULT : 0)) + break; + ret = sys_msgrcv(first, tmp.msgp, (size_t) second, + tmp.msgtyp, third); + break; + } + default: + ret = sys_msgrcv (first, (struct msgbuf __user *) ptr, + (size_t)second, fifth, third); + break; + } + break; + case MSGGET: + ret = sys_msgget((key_t)first, (int)second); + break; + case MSGCTL: + ret = sys_msgctl(first, (int)second, + (struct msqid_ds __user *)ptr); + break; + case SHMAT: { + ulong raddr; + ret = do_shmat(first, (char __user *)ptr, (int)second, &raddr); + if (ret) + break; + ret = put_user(raddr, (ulong __user *) third); + break; + } + case SHMDT: + ret = sys_shmdt((char __user *)ptr); + break; + case SHMGET: + ret = sys_shmget(first, (size_t)second, third); + break; + case SHMCTL: + ret = sys_shmctl(first, (int)second, + (struct shmid_ds __user *)ptr); + break; + } + + return ret; +} + +/* + * sys_pipe() is the normal C calling standard for creating + * a pipe. It's not the way unix traditionally does this, though. + */ +int sys_pipe(int __user *fildes) +{ + int fd[2]; + int error; + + error = do_pipe(fd); + if (!error) { + if (copy_to_user(fildes, fd, 2*sizeof(int))) + error = -EFAULT; + } + return error; +} + +static inline unsigned long do_mmap2(unsigned long addr, size_t len, + unsigned long prot, unsigned long flags, + unsigned long fd, unsigned long off, int shift) +{ + struct file * file = NULL; + int ret = -EINVAL; + + if (shift) { + if (off & ((1 << shift) - 1)) + goto out; + off >>= shift; + } + + ret = -EBADF; + if (!(flags & MAP_ANONYMOUS)) { + if (!(file = fget(fd))) + goto out; + } + + flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); + + down_write(¤t->mm->mmap_sem); + ret = do_mmap_pgoff(file, addr, len, prot, flags, off); + up_write(¤t->mm->mmap_sem); + if (file) + fput(file); +out: + return ret; +} + +unsigned long sys_mmap2(unsigned long addr, size_t len, + unsigned long prot, unsigned long flags, + unsigned long fd, unsigned long pgoff) +{ + return do_mmap2(addr, len, prot, flags, fd, pgoff, PAGE_SHIFT-12); +} + +unsigned long sys_mmap(unsigned long addr, size_t len, + unsigned long prot, unsigned long flags, + unsigned long fd, off_t offset) +{ + return do_mmap2(addr, len, prot, flags, fd, offset, PAGE_SHIFT); +} + +#ifdef CONFIG_PPC32 +/* + * Due to some executables calling the wrong select we sometimes + * get wrong args. This determines how the args are being passed + * (a single ptr to them all args passed) then calls + * sys_select() with the appropriate args. -- Cort + */ +int +ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct timeval __user *tvp) +{ + if ( (unsigned long)n >= 4096 ) + { + unsigned long __user *buffer = (unsigned long __user *)n; + if (!access_ok(VERIFY_READ, buffer, 5*sizeof(unsigned long)) + || __get_user(n, buffer) + || __get_user(inp, ((fd_set __user * __user *)(buffer+1))) + || __get_user(outp, ((fd_set __user * __user *)(buffer+2))) + || __get_user(exp, ((fd_set __user * __user *)(buffer+3))) + || __get_user(tvp, ((struct timeval __user * __user *)(buffer+4)))) + return -EFAULT; + } + return sys_select(n, inp, outp, exp, tvp); +} +#endif + +#ifdef CONFIG_PPC64 +long ppc64_personality(unsigned long personality) +{ + long ret; + + if (personality(current->personality) == PER_LINUX32 + && personality == PER_LINUX) + personality = PER_LINUX32; + ret = sys_personality(personality); + if (ret == PER_LINUX32) + ret = PER_LINUX; + return ret; +} +#endif + +#ifdef CONFIG_PPC64 +#define OVERRIDE_MACHINE (personality(current->personality) == PER_LINUX32) +#else +#define OVERRIDE_MACHINE 0 +#endif + +static inline int override_machine(char *mach) +{ + if (OVERRIDE_MACHINE) { + /* change ppc64 to ppc */ + if (__put_user(0, mach+3) || __put_user(0, mach+4)) + return -EFAULT; + } + return 0; +} + +long ppc_newuname(struct new_utsname __user * name) +{ + int err = 0; + + down_read(&uts_sem); + if (copy_to_user(name, &system_utsname, sizeof(*name))) + err = -EFAULT; + up_read(&uts_sem); + if (!err) + err = override_machine(name->machine); + return err; +} + +int sys_uname(struct old_utsname __user *name) +{ + int err = 0; + + down_read(&uts_sem); + if (copy_to_user(name, &system_utsname, sizeof(*name))) + err = -EFAULT; + up_read(&uts_sem); + if (!err) + err = override_machine(name->machine); + return err; +} + +int sys_olduname(struct oldold_utsname __user *name) +{ + int error; + + if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname))) + return -EFAULT; + + down_read(&uts_sem); + error = __copy_to_user(&name->sysname, &system_utsname.sysname, + __OLD_UTS_LEN); + error |= __put_user(0, name->sysname + __OLD_UTS_LEN); + error |= __copy_to_user(&name->nodename, &system_utsname.nodename, + __OLD_UTS_LEN); + error |= __put_user(0, name->nodename + __OLD_UTS_LEN); + error |= __copy_to_user(&name->release, &system_utsname.release, + __OLD_UTS_LEN); + error |= __put_user(0, name->release + __OLD_UTS_LEN); + error |= __copy_to_user(&name->version, &system_utsname.version, + __OLD_UTS_LEN); + error |= __put_user(0, name->version + __OLD_UTS_LEN); + error |= __copy_to_user(&name->machine, &system_utsname.machine, + __OLD_UTS_LEN); + error |= override_machine(name->machine); + up_read(&uts_sem); + + return error? -EFAULT: 0; +} + +#ifdef CONFIG_PPC64 +time_t sys64_time(time_t __user * tloc) +{ + time_t secs; + time_t usecs; + + long tb_delta = tb_ticks_since(tb_last_stamp); + tb_delta += (jiffies - wall_jiffies) * tb_ticks_per_jiffy; + + secs = xtime.tv_sec; + usecs = (xtime.tv_nsec/1000) + tb_delta / tb_ticks_per_usec; + while (usecs >= USEC_PER_SEC) { + ++secs; + usecs -= USEC_PER_SEC; + } + + if (tloc) { + if (put_user(secs,tloc)) + secs = -EFAULT; + } + + return secs; +} +#endif + +void do_show_syscall(unsigned long r3, unsigned long r4, unsigned long r5, + unsigned long r6, unsigned long r7, unsigned long r8, + struct pt_regs *regs) +{ + printk("syscall %ld(%lx, %lx, %lx, %lx, %lx, %lx) regs=%p current=%p" + " cpu=%d\n", regs->gpr[0], r3, r4, r5, r6, r7, r8, regs, + current, smp_processor_id()); +} + +void do_show_syscall_exit(unsigned long r3) +{ + printk(" -> %lx, current=%p cpu=%d\n", r3, current, smp_processor_id()); +} -- cgit v1.2.3 From 77f543cb467c44960bafa6c91f5af75919d693e4 Mon Sep 17 00:00:00 2001 From: Paul Mackerras Date: Tue, 18 Oct 2005 14:19:41 +1000 Subject: powerpc: Fix various compile errors with ARCH=ppc, ppc64 and powerpc This makes ppc use the syscalls.c from arch/powerpc/kernel, exports copy_and_flush from head_32.S for use by prom_init.c (ARCH=powerpc), and consolidates the sys_fadvise64_64 implementations for 32-bit. Signed-off-by: Paul Mackerras --- arch/powerpc/Makefile | 1 - arch/powerpc/kernel/Makefile | 10 +++++----- arch/powerpc/kernel/head_32.S | 2 +- arch/powerpc/kernel/sys_ppc32.c | 7 ------- arch/powerpc/kernel/syscalls.c | 7 +++++++ arch/powerpc/kernel/systbl.S | 2 +- arch/ppc/kernel/Makefile | 2 +- arch/ppc64/kernel/misc.S | 2 +- 8 files changed, 16 insertions(+), 17 deletions(-) (limited to 'arch/powerpc/kernel/syscalls.c') diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index a5f2eb5f89ce..29cda0732703 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -121,7 +121,6 @@ head-$(CONFIG_4xx) := arch/powerpc/kernel/head_4xx.o head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o -head-$(CONFIG_6xx) += arch/powerpc/kernel/idle_6xx.o head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index 043ddd09521d..01b6d630edc9 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -10,7 +10,8 @@ CFLAGS_prom_init.o += -fPIC CFLAGS_btext.o += -fPIC endif -obj-y := semaphore.o cputable.o ptrace.o signal_32.o +obj-y := semaphore.o cputable.o ptrace.o syscalls.o \ + signal_32.o obj-$(CONFIG_PPC64) += binfmt_elf32.o sys_ppc32.o obj-$(CONFIG_ALTIVEC) += vecemu.o vector.o obj-$(CONFIG_POWER4) += idle_power4.o @@ -24,14 +25,13 @@ extra-$(CONFIG_40x) := head_4xx.o extra-$(CONFIG_44x) := head_44x.o extra-$(CONFIG_FSL_BOOKE) := head_fsl_booke.o extra-$(CONFIG_8xx) := head_8xx.o -extra-$(CONFIG_6xx) += idle_6xx.o extra-$(CONFIG_PPC64) += entry_64.o extra-$(CONFIG_PPC_FPU) += fpu.o extra-y += vmlinux.lds obj-y += process.o init_task.o \ - prom.o systbl.o traps.o syscalls.o -obj-$(CONFIG_PPC32) += entry_32.o setup_32.o misc_32.o + prom.o systbl.o traps.o +obj-$(CONFIG_PPC32) += entry_32.o idle_6xx.o setup_32.o misc_32.o obj-$(CONFIG_PPC64) += setup_64.o misc_64.o obj-$(CONFIG_PPC_OF) += prom_init.o obj-$(CONFIG_MODULES) += ppc_ksyms.o @@ -44,7 +44,7 @@ endif else # stuff used from here for ARCH=ppc or ARCH=ppc64 -obj-$(CONFIG_PPC64) += traps.o process.o init_task.o syscalls.o +obj-$(CONFIG_PPC64) += traps.o process.o init_task.o fpux-$(CONFIG_PPC32) += fpu.o extra-$(CONFIG_PPC_FPU) += $(fpux-y) diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S index 7ef9a3e3002b..cd51fe585fcd 100644 --- a/arch/powerpc/kernel/head_32.S +++ b/arch/powerpc/kernel/head_32.S @@ -831,7 +831,7 @@ relocate_kernel: * r3 = dest addr, r4 = source addr, r5 = copy limit, r6 = start offset * on exit, r3, r4, r5 are unchanged, r6 is updated to be >= r5. */ -copy_and_flush: +_GLOBAL(copy_and_flush) addi r5,r5,-4 addi r6,r6,-4 4: li r0,L1_CACHE_BYTES/4 diff --git a/arch/powerpc/kernel/sys_ppc32.c b/arch/powerpc/kernel/sys_ppc32.c index 9babe055356e..2f1e41a82876 100644 --- a/arch/powerpc/kernel/sys_ppc32.c +++ b/arch/powerpc/kernel/sys_ppc32.c @@ -1069,13 +1069,6 @@ long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low, advice); } -long ppc32_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low, - u32 len_high, u32 len_low) -{ - return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, - (u64)len_high << 32 | len_low, advice); -} - long ppc32_timer_create(clockid_t clock, struct compat_sigevent __user *ev32, timer_t __user *timer_id) diff --git a/arch/powerpc/kernel/syscalls.c b/arch/powerpc/kernel/syscalls.c index 3e3a4f67de96..7a23721365a6 100644 --- a/arch/powerpc/kernel/syscalls.c +++ b/arch/powerpc/kernel/syscalls.c @@ -336,6 +336,13 @@ time_t sys64_time(time_t __user * tloc) } #endif +long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low, + u32 len_high, u32 len_low) +{ + return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, + (u64)len_high << 32 | len_low, advice); +} + void do_show_syscall(unsigned long r3, unsigned long r4, unsigned long r5, unsigned long r6, unsigned long r7, unsigned long r8, struct pt_regs *regs) diff --git a/arch/powerpc/kernel/systbl.S b/arch/powerpc/kernel/systbl.S index b364141ec01c..1b807f79d5da 100644 --- a/arch/powerpc/kernel/systbl.S +++ b/arch/powerpc/kernel/systbl.S @@ -297,7 +297,7 @@ SYSCALL32(tgkill) SYSCALL32(utimes) COMPAT_SYS(statfs64) COMPAT_SYS(fstatfs64) -SYSX(sys_ni_syscall, ppc32_fadvise64_64, sys_fadvise64_64) +SYSX(sys_ni_syscall, ppc_fadvise64_64, ppc_fadvise64_64) PPC_SYS(rtas) OLDSYS(debug_setcontext) SYSCALL(ni_syscall) diff --git a/arch/ppc/kernel/Makefile b/arch/ppc/kernel/Makefile index c178397c50af..5a742c7b0509 100644 --- a/arch/ppc/kernel/Makefile +++ b/arch/ppc/kernel/Makefile @@ -14,7 +14,7 @@ extra-y += vmlinux.lds obj-y := entry.o traps.o irq.o idle.o time.o misc.o \ process.o align.o \ - syscalls.o setup.o \ + setup.o \ ppc_htab.o perfmon.o obj-$(CONFIG_6xx) += l2cr.o cpu_setup_6xx.o obj-$(CONFIG_SOFTWARE_SUSPEND) += swsusp.o diff --git a/arch/ppc64/kernel/misc.S b/arch/ppc64/kernel/misc.S index eb407c429bb0..755d73f222e2 100644 --- a/arch/ppc64/kernel/misc.S +++ b/arch/ppc64/kernel/misc.S @@ -1175,7 +1175,7 @@ _GLOBAL(sys_call_table32) .llong .sys32_utimes .llong .compat_sys_statfs64 .llong .compat_sys_fstatfs64 - .llong .ppc32_fadvise64_64 /* 32bit only fadvise64_64 */ + .llong .ppc_fadvise64_64 /* 32bit only fadvise64_64 */ .llong .ppc_rtas /* 255 */ .llong .sys_ni_syscall /* 256 reserved for sys_debug_setcontext */ .llong .sys_ni_syscall /* 257 reserved for vserver */ -- cgit v1.2.3 From 05d84681abcb33fe34accb5982c413daeb4208c4 Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Fri, 21 Oct 2005 16:01:34 +1000 Subject: [PATCH] powerpc: Fix mmap returning 64 bit addresses The merge of syscalls.c & sys_ppc32.c (30286ef6e044bc3d9019c3d8b900572e3fa05e65) broke mmap, if the mmap returned a 64 bit address. do_mmap2 was taking the return value from do_mmap_pgoff (an unsigned long), and storing it in an int, before returning it to sys_mmap as an unsigned long. So we were losing the high bits of the address. You would have thought the compiler could catch this for us ... Signed-off-by: Michael Ellerman Signed-off-by: Paul Mackerras --- arch/powerpc/kernel/syscalls.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/powerpc/kernel/syscalls.c') diff --git a/arch/powerpc/kernel/syscalls.c b/arch/powerpc/kernel/syscalls.c index 7a23721365a6..f72ced11212d 100644 --- a/arch/powerpc/kernel/syscalls.c +++ b/arch/powerpc/kernel/syscalls.c @@ -162,7 +162,7 @@ static inline unsigned long do_mmap2(unsigned long addr, size_t len, unsigned long fd, unsigned long off, int shift) { struct file * file = NULL; - int ret = -EINVAL; + unsigned long ret = -EINVAL; if (shift) { if (off & ((1 << shift) - 1)) -- cgit v1.2.3