diff options
Diffstat (limited to 'arch/um')
50 files changed, 855 insertions, 455 deletions
diff --git a/arch/um/Kconfig b/arch/um/Kconfig index cd06ed7d842d..3b5f47c46907 100644 --- a/arch/um/Kconfig +++ b/arch/um/Kconfig @@ -65,6 +65,30 @@ config STATIC_LINK chroot, and you disable CONFIG_MODE_TT, you probably want to say Y here. +config HOST_2G_2G + bool "2G/2G host address space split" + default n + depends on MODE_TT + help + This is needed when the host on which you run has a 2G/2G memory + split, instead of the customary 3G/1G. + + Note that to enable such a host + configuration, which makes sense only in some cases, you need special + host patches. + + So, if you do not know what to do here, say 'N'. + +config KERNEL_HALF_GIGS + int "Kernel address space size (in .5G units)" + default "1" + depends on MODE_TT + help + This determines the amount of address space that UML will allocate for + its own, measured in half Gigabyte units. The default is 1. + Change this only if you need to boot UML with an unusually large amount + of physical memory. + config MODE_SKAS bool "Separate Kernel Address Space support" default y @@ -182,19 +206,6 @@ config MAGIC_SYSRQ The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y unless you really know what this hack does. -config HOST_2G_2G - bool "2G/2G host address space split" - default n - help - This is needed when the host on which you run has a 2G/2G memory - split, instead of the customary 3G/1G. - - Note that to enable such a host - configuration, which makes sense only in some cases, you need special - host patches. - - So, if you do not know what to do here, say 'N'. - config SMP bool "Symmetric multi-processing support (EXPERIMENTAL)" default n @@ -241,15 +252,6 @@ config NEST_LEVEL set to the host's CONFIG_NEST_LEVEL + CONFIG_KERNEL_HALF_GIGS. Only change this if you are running nested UMLs. -config KERNEL_HALF_GIGS - int "Kernel address space size (in .5G units)" - default "1" - help - This determines the amount of address space that UML will allocate for - its own, measured in half Gigabyte units. The default is 1. - Change this only if you need to boot UML with an unusually large amount - of physical memory. - config HIGHMEM bool "Highmem support" depends on !64BIT diff --git a/arch/um/Makefile b/arch/um/Makefile index e1ffad224605..e55d32e903bc 100644 --- a/arch/um/Makefile +++ b/arch/um/Makefile @@ -60,7 +60,7 @@ AFLAGS += $(ARCH_INCLUDE) USER_CFLAGS := $(patsubst -I%,,$(CFLAGS)) USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \ - $(MODE_INCLUDE) + $(MODE_INCLUDE) -D_FILE_OFFSET_BITS=64 # -Derrno=kernel_errno - This turns all kernel references to errno into # kernel_errno to separate them from the libc errno. This allows -fno-common diff --git a/arch/um/Makefile-i386 b/arch/um/Makefile-i386 index aef7c50f8e13..1f7dcb064aee 100644 --- a/arch/um/Makefile-i386 +++ b/arch/um/Makefile-i386 @@ -17,8 +17,6 @@ ifeq ("$(origin SUBARCH)", "command line") ifneq ("$(shell uname -m | sed -e s/i.86/i386/)", "$(SUBARCH)") CFLAGS += $(call cc-option,-m32) USER_CFLAGS += $(call cc-option,-m32) -HOSTCFLAGS += $(call cc-option,-m32) -HOSTLDFLAGS += $(call cc-option,-m32) AFLAGS += $(call cc-option,-m32) LINK-y += $(call cc-option,-m32) UML_OBJCOPYFLAGS += -F $(ELF_FORMAT) diff --git a/arch/um/drivers/chan_user.c b/arch/um/drivers/chan_user.c index de3bce71aeb3..1c55d5802489 100644 --- a/arch/um/drivers/chan_user.c +++ b/arch/um/drivers/chan_user.c @@ -16,7 +16,6 @@ #include "user_util.h" #include "chan_user.h" #include "user.h" -#include "helper.h" #include "os.h" #include "choose-mode.h" #include "mode.h" diff --git a/arch/um/drivers/harddog_kern.c b/arch/um/drivers/harddog_kern.c index 147ec19f6bb9..49acb2badf32 100644 --- a/arch/um/drivers/harddog_kern.c +++ b/arch/um/drivers/harddog_kern.c @@ -46,7 +46,6 @@ #include <linux/smp_lock.h> #include <linux/init.h> #include <asm/uaccess.h> -#include "helper.h" #include "mconsole.h" MODULE_LICENSE("GPL"); diff --git a/arch/um/drivers/harddog_user.c b/arch/um/drivers/harddog_user.c index d934181b8d4c..def013b5a3c7 100644 --- a/arch/um/drivers/harddog_user.c +++ b/arch/um/drivers/harddog_user.c @@ -8,7 +8,6 @@ #include <errno.h> #include "user_util.h" #include "user.h" -#include "helper.h" #include "mconsole.h" #include "os.h" #include "choose-mode.h" diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c index 721e2601a75d..fe865d9a3721 100644 --- a/arch/um/drivers/net_kern.c +++ b/arch/um/drivers/net_kern.c @@ -96,7 +96,6 @@ irqreturn_t uml_net_interrupt(int irq, void *dev_id, struct pt_regs *regs) static int uml_net_open(struct net_device *dev) { struct uml_net_private *lp = dev->priv; - char addr[sizeof("255.255.255.255\0")]; int err; spin_lock(&lp->lock); @@ -107,7 +106,7 @@ static int uml_net_open(struct net_device *dev) } if(!lp->have_mac){ - dev_ip_addr(dev, addr, &lp->mac[2]); + dev_ip_addr(dev, &lp->mac[2]); set_ether_mac(dev, lp->mac); } @@ -664,8 +663,6 @@ static int uml_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) { struct in_ifaddr *ifa = ptr; - u32 addr = ifa->ifa_address; - u32 netmask = ifa->ifa_mask; struct net_device *dev = ifa->ifa_dev->dev; struct uml_net_private *lp; void (*proc)(unsigned char *, unsigned char *, void *); @@ -685,14 +682,8 @@ static int uml_inetaddr_event(struct notifier_block *this, unsigned long event, break; } if(proc != NULL){ - addr_buf[0] = addr & 0xff; - addr_buf[1] = (addr >> 8) & 0xff; - addr_buf[2] = (addr >> 16) & 0xff; - addr_buf[3] = addr >> 24; - netmask_buf[0] = netmask & 0xff; - netmask_buf[1] = (netmask >> 8) & 0xff; - netmask_buf[2] = (netmask >> 16) & 0xff; - netmask_buf[3] = netmask >> 24; + memcpy(addr_buf, &ifa->ifa_address, sizeof(addr_buf)); + memcpy(netmask_buf, &ifa->ifa_mask, sizeof(netmask_buf)); (*proc)(addr_buf, netmask_buf, &lp->user); } return(NOTIFY_DONE); @@ -774,27 +765,18 @@ int setup_etheraddr(char *str, unsigned char *addr) return(1); } -void dev_ip_addr(void *d, char *buf, char *bin_buf) +void dev_ip_addr(void *d, unsigned char *bin_buf) { struct net_device *dev = d; struct in_device *ip = dev->ip_ptr; struct in_ifaddr *in; - u32 addr; if((ip == NULL) || ((in = ip->ifa_list) == NULL)){ printk(KERN_WARNING "dev_ip_addr - device not assigned an " "IP address\n"); return; } - addr = in->ifa_address; - sprintf(buf, "%d.%d.%d.%d", addr & 0xff, (addr >> 8) & 0xff, - (addr >> 16) & 0xff, addr >> 24); - if(bin_buf){ - bin_buf[0] = addr & 0xff; - bin_buf[1] = (addr >> 8) & 0xff; - bin_buf[2] = (addr >> 16) & 0xff; - bin_buf[3] = addr >> 24; - } + memcpy(bin_buf, &in->ifa_address, sizeof(in->ifa_address)); } void set_ether_mac(void *d, unsigned char *addr) @@ -829,14 +811,8 @@ void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *, if(ip == NULL) return; in = ip->ifa_list; while(in != NULL){ - address[0] = in->ifa_address & 0xff; - address[1] = (in->ifa_address >> 8) & 0xff; - address[2] = (in->ifa_address >> 16) & 0xff; - address[3] = in->ifa_address >> 24; - netmask[0] = in->ifa_mask & 0xff; - netmask[1] = (in->ifa_mask >> 8) & 0xff; - netmask[2] = (in->ifa_mask >> 16) & 0xff; - netmask[3] = in->ifa_mask >> 24; + memcpy(address, &in->ifa_address, sizeof(address)); + memcpy(netmask, &in->ifa_mask, sizeof(netmask)); (*cb)(address, netmask, arg); in = in->ifa_next; } diff --git a/arch/um/drivers/net_user.c b/arch/um/drivers/net_user.c index 3730d4f12713..098fa65981ab 100644 --- a/arch/um/drivers/net_user.c +++ b/arch/um/drivers/net_user.c @@ -16,7 +16,6 @@ #include "user_util.h" #include "kern_util.h" #include "net_user.h" -#include "helper.h" #include "os.h" int tap_open_common(void *dev, char *gate_addr) diff --git a/arch/um/drivers/port_user.c b/arch/um/drivers/port_user.c index 14dd2002d2da..ed4a1a6c5d83 100644 --- a/arch/um/drivers/port_user.c +++ b/arch/um/drivers/port_user.c @@ -18,7 +18,6 @@ #include "user.h" #include "chan_user.h" #include "port.h" -#include "helper.h" #include "os.h" struct port_chan { diff --git a/arch/um/drivers/random.c b/arch/um/drivers/random.c index f9e22198e011..ba471f5864a6 100644 --- a/arch/um/drivers/random.c +++ b/arch/um/drivers/random.c @@ -58,10 +58,8 @@ static ssize_t rng_dev_read (struct file *filp, char __user *buf, size_t size, if (filp->f_flags & O_NONBLOCK) return ret ? : -EAGAIN; - if(need_resched()){ - current->state = TASK_INTERRUPTIBLE; - schedule_timeout(1); - } + if(need_resched()) + schedule_timeout_interruptible(1); } else return n; if (signal_pending (current)) diff --git a/arch/um/drivers/slip_user.c b/arch/um/drivers/slip_user.c index 71af444e591f..89fbec185cc1 100644 --- a/arch/um/drivers/slip_user.c +++ b/arch/um/drivers/slip_user.c @@ -14,7 +14,6 @@ #include "net_user.h" #include "slip.h" #include "slip_common.h" -#include "helper.h" #include "os.h" void slip_user_init(void *data, void *dev) diff --git a/arch/um/drivers/slirp_user.c b/arch/um/drivers/slirp_user.c index 8d91f663d82c..b94c66114bc8 100644 --- a/arch/um/drivers/slirp_user.c +++ b/arch/um/drivers/slirp_user.c @@ -13,7 +13,6 @@ #include "net_user.h" #include "slirp.h" #include "slip_common.h" -#include "helper.h" #include "os.h" void slirp_user_init(void *data, void *dev) diff --git a/arch/um/drivers/xterm.c b/arch/um/drivers/xterm.c index 90e0e5ff451e..b530f1a6540d 100644 --- a/arch/um/drivers/xterm.c +++ b/arch/um/drivers/xterm.c @@ -14,7 +14,6 @@ #include <sys/socket.h> #include "kern_util.h" #include "chan_user.h" -#include "helper.h" #include "user_util.h" #include "user.h" #include "os.h" diff --git a/arch/um/include/helper.h b/arch/um/include/helper.h deleted file mode 100644 index 162ac31192fd..000000000000 --- a/arch/um/include/helper.h +++ /dev/null @@ -1,27 +0,0 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#ifndef __HELPER_H__ -#define __HELPER_H__ - -extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv, - unsigned long *stack_out); -extern int run_helper_thread(int (*proc)(void *), void *arg, - unsigned int flags, unsigned long *stack_out, - int stack_order); -extern int helper_wait(int pid); - -#endif - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/include/mem_user.h b/arch/um/include/mem_user.h index 9fef4123a65a..a1064c5823bf 100644 --- a/arch/um/include/mem_user.h +++ b/arch/um/include/mem_user.h @@ -57,7 +57,7 @@ extern int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem); extern unsigned long get_vm(unsigned long len); extern void setup_physmem(unsigned long start, unsigned long usable, - unsigned long len, unsigned long highmem); + unsigned long len, unsigned long long highmem); extern void add_iomem(char *name, int fd, unsigned long size); extern unsigned long phys_offset(unsigned long phys); extern void unmap_physmem(void); diff --git a/arch/um/include/net_user.h b/arch/um/include/net_user.h index 89885a77a771..800c403920bc 100644 --- a/arch/um/include/net_user.h +++ b/arch/um/include/net_user.h @@ -25,7 +25,7 @@ struct net_user_info { }; extern void ether_user_init(void *data, void *dev); -extern void dev_ip_addr(void *d, char *buf, char *bin_buf); +extern void dev_ip_addr(void *d, unsigned char *bin_buf); extern void set_ether_mac(void *d, unsigned char *addr); extern void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *, void *), diff --git a/arch/um/include/os.h b/arch/um/include/os.h index 2e58e304b8be..2cccfa5b8ab5 100644 --- a/arch/um/include/os.h +++ b/arch/um/include/os.h @@ -167,7 +167,7 @@ extern int can_do_skas(void); #endif /* mem.c */ -extern int create_mem_file(unsigned long len); +extern int create_mem_file(unsigned long long len); /* process.c */ extern unsigned long os_process_pc(int pid); @@ -199,6 +199,20 @@ extern void forward_pending_sigio(int target); extern int start_fork_tramp(void *arg, unsigned long temp_stack, int clone_flags, int (*tramp)(void *)); +/* uaccess.c */ +extern unsigned long __do_user_copy(void *to, const void *from, int n, + void **fault_addr, void **fault_catcher, + void (*op)(void *to, const void *from, + int n), int *faulted_out); + +/* helper.c */ +extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv, + unsigned long *stack_out); +extern int run_helper_thread(int (*proc)(void *), void *arg, + unsigned int flags, unsigned long *stack_out, + int stack_order); +extern int helper_wait(int pid); + #endif /* diff --git a/arch/um/include/sysdep-i386/stub.h b/arch/um/include/sysdep-i386/stub.h index d3699fe1c613..a49ceb199ee5 100644 --- a/arch/um/include/sysdep-i386/stub.h +++ b/arch/um/include/sysdep-i386/stub.h @@ -16,45 +16,69 @@ extern void stub_clone_handler(void); #define STUB_MMAP_NR __NR_mmap2 #define MMAP_OFFSET(o) ((o) >> PAGE_SHIFT) +static inline long stub_syscall1(long syscall, long arg1) +{ + long ret; + + __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1)); + + return ret; +} + static inline long stub_syscall2(long syscall, long arg1, long arg2) { long ret; - __asm__("movl %0, %%ecx; " : : "g" (arg2) : "%ecx"); - __asm__("movl %0, %%ebx; " : : "g" (arg1) : "%ebx"); - __asm__("movl %0, %%eax; " : : "g" (syscall) : "%eax"); - __asm__("int $0x80;" : : : "%eax"); - __asm__ __volatile__("movl %%eax, %0; " : "=g" (ret) :); - return(ret); + __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1), + "c" (arg2)); + + return ret; } static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3) { - __asm__("movl %0, %%edx; " : : "g" (arg3) : "%edx"); - return(stub_syscall2(syscall, arg1, arg2)); + long ret; + + __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1), + "c" (arg2), "d" (arg3)); + + return ret; } static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3, long arg4) { - __asm__("movl %0, %%esi; " : : "g" (arg4) : "%esi"); - return(stub_syscall3(syscall, arg1, arg2, arg3)); + long ret; + + __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1), + "c" (arg2), "d" (arg3), "S" (arg4)); + + return ret; +} + +static inline long stub_syscall5(long syscall, long arg1, long arg2, long arg3, + long arg4, long arg5) +{ + long ret; + + __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1), + "c" (arg2), "d" (arg3), "S" (arg4), "D" (arg5)); + + return ret; } static inline long stub_syscall6(long syscall, long arg1, long arg2, long arg3, long arg4, long arg5, long arg6) { long ret; - __asm__("movl %0, %%eax; " : : "g" (syscall) : "%eax"); - __asm__("movl %0, %%ebx; " : : "g" (arg1) : "%ebx"); - __asm__("movl %0, %%ecx; " : : "g" (arg2) : "%ecx"); - __asm__("movl %0, %%edx; " : : "g" (arg3) : "%edx"); - __asm__("movl %0, %%esi; " : : "g" (arg4) : "%esi"); - __asm__("movl %0, %%edi; " : : "g" (arg5) : "%edi"); - __asm__ __volatile__("pushl %%ebp ; movl %1, %%ebp; " - "int $0x80; popl %%ebp ; " - "movl %%eax, %0; " : "=g" (ret) : "g" (arg6) : "%eax"); - return(ret); + + __asm__ volatile ("push %%ebp ; movl %%eax,%%ebp ; movl %1,%%eax ; " + "int $0x80 ; pop %%ebp" + : "=a" (ret) + : "g" (syscall), "b" (arg1), "c" (arg2), "d" (arg3), + "S" (arg4), "D" (arg5), "0" (arg6)); + + return ret; } static inline void trap_myself(void) diff --git a/arch/um/include/sysdep-x86_64/stub.h b/arch/um/include/sysdep-x86_64/stub.h index f599058d8263..2bd6e7a97286 100644 --- a/arch/um/include/sysdep-x86_64/stub.h +++ b/arch/um/include/sysdep-x86_64/stub.h @@ -17,37 +17,72 @@ extern void stub_clone_handler(void); #define STUB_MMAP_NR __NR_mmap #define MMAP_OFFSET(o) (o) +#define __syscall_clobber "r11","rcx","memory" +#define __syscall "syscall" + static inline long stub_syscall2(long syscall, long arg1, long arg2) { long ret; - __asm__("movq %0, %%rsi; " : : "g" (arg2) : "%rsi"); - __asm__("movq %0, %%rdi; " : : "g" (arg1) : "%rdi"); - __asm__("movq %0, %%rax; " : : "g" (syscall) : "%rax"); - __asm__("syscall;" : : : "%rax", "%r11", "%rcx"); - __asm__ __volatile__("movq %%rax, %0; " : "=g" (ret) :); - return(ret); + __asm__ volatile (__syscall + : "=a" (ret) + : "0" (syscall), "D" (arg1), "S" (arg2) : __syscall_clobber ); + + return ret; } static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3) { - __asm__("movq %0, %%rdx; " : : "g" (arg3) : "%rdx"); - return(stub_syscall2(syscall, arg1, arg2)); + long ret; + + __asm__ volatile (__syscall + : "=a" (ret) + : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3) + : __syscall_clobber ); + + return ret; } static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3, long arg4) { - __asm__("movq %0, %%r10; " : : "g" (arg4) : "%r10"); - return(stub_syscall3(syscall, arg1, arg2, arg3)); + long ret; + + __asm__ volatile ("movq %5,%%r10 ; " __syscall + : "=a" (ret) + : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3), + "g" (arg4) + : __syscall_clobber, "r10" ); + + return ret; +} + +static inline long stub_syscall5(long syscall, long arg1, long arg2, long arg3, + long arg4, long arg5) +{ + long ret; + + __asm__ volatile ("movq %5,%%r10 ; movq %6,%%r8 ; " __syscall + : "=a" (ret) + : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3), + "g" (arg4), "g" (arg5) + : __syscall_clobber, "r10", "r8" ); + + return ret; } static inline long stub_syscall6(long syscall, long arg1, long arg2, long arg3, long arg4, long arg5, long arg6) { - __asm__("movq %0, %%r9; " : : "g" (arg6) : "%r9"); - __asm__("movq %0, %%r8; " : : "g" (arg5) : "%r8"); - return(stub_syscall4(syscall, arg1, arg2, arg3, arg4)); + long ret; + + __asm__ volatile ("movq %5,%%r10 ; movq %6,%%r8 ; " + "movq %7, %%r9; " __syscall : "=a" (ret) + : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3), + "g" (arg4), "g" (arg5), "g" (arg6) + : __syscall_clobber, "r10", "r8", "r9" ); + + return ret; } static inline void trap_myself(void) diff --git a/arch/um/include/uml_uaccess.h b/arch/um/include/uml_uaccess.h index f77eb6428453..c0df11d06f5e 100644 --- a/arch/um/include/uml_uaccess.h +++ b/arch/um/include/uml_uaccess.h @@ -8,10 +8,6 @@ extern int __do_copy_to_user(void *to, const void *from, int n, void **fault_addr, void **fault_catcher); -extern unsigned long __do_user_copy(void *to, const void *from, int n, - void **fault_addr, void **fault_catcher, - void (*op)(void *to, const void *from, - int n), int *faulted_out); void __do_copy(void *to, const void *from, int n); #endif diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile index 1a0001b3850c..3de9d21e36bf 100644 --- a/arch/um/kernel/Makefile +++ b/arch/um/kernel/Makefile @@ -7,10 +7,10 @@ extra-y := vmlinux.lds clean-files := obj-y = config.o exec_kern.o exitcode.o \ - helper.o init_task.o irq.o irq_user.o ksyms.o main.o mem.o physmem.o \ + init_task.o irq.o irq_user.o ksyms.o mem.o physmem.o \ process_kern.o ptrace.o reboot.o resource.o sigio_user.o sigio_kern.o \ signal_kern.o signal_user.o smp.o syscall_kern.o sysrq.o time.o \ - time_kern.o tlb.o trap_kern.o trap_user.o uaccess_user.o um_arch.o \ + time_kern.o tlb.o trap_kern.o trap_user.o uaccess.o um_arch.o \ umid.o user_util.o obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o @@ -24,8 +24,7 @@ obj-$(CONFIG_MODE_SKAS) += skas/ user-objs-$(CONFIG_TTY_LOG) += tty_log.o -USER_OBJS := $(user-objs-y) config.o helper.o main.o time.o tty_log.o umid.o \ - user_util.o +USER_OBJS := $(user-objs-y) config.o time.o tty_log.o umid.o user_util.o include arch/um/scripts/Makefile.rules diff --git a/arch/um/kernel/ksyms.c b/arch/um/kernel/ksyms.c index a97a72e516aa..7713e7a6f476 100644 --- a/arch/um/kernel/ksyms.c +++ b/arch/um/kernel/ksyms.c @@ -20,7 +20,6 @@ #include "user_util.h" #include "mem_user.h" #include "os.h" -#include "helper.h" EXPORT_SYMBOL(stop); EXPORT_SYMBOL(uml_physmem); diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c index 462cc9d65386..fa4f915be5c5 100644 --- a/arch/um/kernel/mem.c +++ b/arch/um/kernel/mem.c @@ -234,8 +234,8 @@ void paging_init(void) empty_bad_page = (unsigned long *) alloc_bootmem_low_pages(PAGE_SIZE); for(i=0;i<sizeof(zones_size)/sizeof(zones_size[0]);i++) zones_size[i] = 0; - zones_size[0] = (end_iomem >> PAGE_SHIFT) - (uml_physmem >> PAGE_SHIFT); - zones_size[2] = highmem >> PAGE_SHIFT; + zones_size[ZONE_DMA] = (end_iomem >> PAGE_SHIFT) - (uml_physmem >> PAGE_SHIFT); + zones_size[ZONE_HIGHMEM] = highmem >> PAGE_SHIFT; free_area_init(zones_size); /* diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c index ea670fcc8af5..f3b583a878a6 100644 --- a/arch/um/kernel/physmem.c +++ b/arch/um/kernel/physmem.c @@ -246,7 +246,7 @@ int is_remapped(void *virt) /* Changed during early boot */ unsigned long high_physmem; -extern unsigned long physmem_size; +extern unsigned long long physmem_size; int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem) { @@ -321,7 +321,7 @@ void map_memory(unsigned long virt, unsigned long phys, unsigned long len, extern int __syscall_stub_start, __binary_start; void setup_physmem(unsigned long start, unsigned long reserve_end, - unsigned long len, unsigned long highmem) + unsigned long len, unsigned long long highmem) { unsigned long reserve = reserve_end - start; int pfn = PFN_UP(__pa(reserve_end)); diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c index 71af4d503899..98e09395c093 100644 --- a/arch/um/kernel/ptrace.c +++ b/arch/um/kernel/ptrace.c @@ -43,53 +43,10 @@ void ptrace_disable(struct task_struct *child) extern int peek_user(struct task_struct * child, long addr, long data); extern int poke_user(struct task_struct * child, long addr, long data); -long sys_ptrace(long request, long pid, long addr, long data) +long arch_ptrace(struct task_struct *child, long request, long addr, long data) { - struct task_struct *child; int i, ret; - lock_kernel(); - ret = -EPERM; - if (request == PTRACE_TRACEME) { - /* are we already being traced? */ - if (current->ptrace & PT_PTRACED) - goto out; - - ret = security_ptrace(current->parent, current); - if (ret) - goto out; - - /* set the ptrace bit in the process flags. */ - current->ptrace |= PT_PTRACED; - ret = 0; - goto out; - } - ret = -ESRCH; - read_lock(&tasklist_lock); - child = find_task_by_pid(pid); - if (child) - get_task_struct(child); - read_unlock(&tasklist_lock); - if (!child) - goto out; - - ret = -EPERM; - if (pid == 1) /* you may not mess with init */ - goto out_tsk; - - if (request == PTRACE_ATTACH) { - ret = ptrace_attach(child); - goto out_tsk; - } - -#ifdef SUBACH_PTRACE_SPECIAL - SUBARCH_PTRACE_SPECIAL(child,request,addr,data); -#endif - - ret = ptrace_check_attach(child, request == PTRACE_KILL); - if (ret < 0) - goto out_tsk; - switch (request) { /* when I and D space are separate, these will need to be fixed. */ case PTRACE_PEEKTEXT: /* read word at location addr. */ @@ -282,10 +239,7 @@ long sys_ptrace(long request, long pid, long addr, long data) ret = ptrace_request(child, request, addr, data); break; } - out_tsk: - put_task_struct(child); - out: - unlock_kernel(); + return ret; } diff --git a/arch/um/kernel/sigio_user.c b/arch/um/kernel/sigio_user.c index a52751108aa1..48b1f644b9a6 100644 --- a/arch/um/kernel/sigio_user.c +++ b/arch/um/kernel/sigio_user.c @@ -18,7 +18,6 @@ #include "kern_util.h" #include "user_util.h" #include "sigio.h" -#include "helper.h" #include "os.h" /* Changed during early boot */ @@ -225,7 +224,7 @@ static int need_poll(int n) next_poll.used = n; return(0); } - if(next_poll.poll != NULL) kfree(next_poll.poll); + kfree(next_poll.poll); next_poll.poll = um_kmalloc_atomic(n * sizeof(struct pollfd)); if(next_poll.poll == NULL){ printk("need_poll : failed to allocate new pollfds\n"); diff --git a/arch/um/kernel/skas/include/mmu-skas.h b/arch/um/kernel/skas/include/mmu-skas.h index 09536f81ee42..44110c521e49 100644 --- a/arch/um/kernel/skas/include/mmu-skas.h +++ b/arch/um/kernel/skas/include/mmu-skas.h @@ -8,6 +8,7 @@ #include "linux/config.h" #include "mm_id.h" +#include "asm/ldt.h" struct mmu_context_skas { struct mm_id id; @@ -15,6 +16,7 @@ struct mmu_context_skas { #ifdef CONFIG_3_LEVEL_PGTABLES unsigned long last_pmd; #endif + uml_ldt_t ldt; }; extern void switch_mm_skas(struct mm_id * mm_idp); diff --git a/arch/um/kernel/skas/include/skas.h b/arch/um/kernel/skas/include/skas.h index 060934740f9f..daa2f85b684c 100644 --- a/arch/um/kernel/skas/include/skas.h +++ b/arch/um/kernel/skas/include/skas.h @@ -10,7 +10,8 @@ #include "sysdep/ptrace.h" extern int userspace_pid[]; -extern int proc_mm, ptrace_faultinfo; +extern int proc_mm, ptrace_faultinfo, ptrace_ldt; +extern int skas_needs_stub; extern void switch_threads(void *me, void *next); extern void thread_wait(void *sw, void *fb); diff --git a/arch/um/kernel/skas/mem.c b/arch/um/kernel/skas/mem.c index 147466d7ff4f..88ab96c609ce 100644 --- a/arch/um/kernel/skas/mem.c +++ b/arch/um/kernel/skas/mem.c @@ -20,7 +20,7 @@ unsigned long set_task_sizes_skas(int arg, unsigned long *host_size_out, *task_size_out = CONFIG_HOST_TASK_SIZE; #else *host_size_out = top; - if (proc_mm && ptrace_faultinfo) + if (!skas_needs_stub) *task_size_out = top; else *task_size_out = CONFIG_STUB_START & PGDIR_MASK; #endif diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c index 9e5e39cea821..677871f1b37c 100644 --- a/arch/um/kernel/skas/mmu.c +++ b/arch/um/kernel/skas/mmu.c @@ -15,6 +15,7 @@ #include "asm/mmu.h" #include "asm/pgalloc.h" #include "asm/pgtable.h" +#include "asm/ldt.h" #include "os.h" #include "skas.h" @@ -74,13 +75,12 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc, int init_new_context_skas(struct task_struct *task, struct mm_struct *mm) { - struct mm_struct *cur_mm = current->mm; - struct mm_id *cur_mm_id = &cur_mm->context.skas.id; - struct mm_id *mm_id = &mm->context.skas.id; + struct mmu_context_skas *from_mm = NULL; + struct mmu_context_skas *to_mm = &mm->context.skas; unsigned long stack = 0; - int from, ret = -ENOMEM; + int from_fd, ret = -ENOMEM; - if(!proc_mm || !ptrace_faultinfo){ + if(skas_needs_stub){ stack = get_zeroed_page(GFP_KERNEL); if(stack == 0) goto out; @@ -102,33 +102,43 @@ int init_new_context_skas(struct task_struct *task, struct mm_struct *mm) mm->nr_ptes--; } - mm_id->stack = stack; + + to_mm->id.stack = stack; + if(current->mm != NULL && current->mm != &init_mm) + from_mm = ¤t->mm->context.skas; if(proc_mm){ - if((cur_mm != NULL) && (cur_mm != &init_mm)) - from = cur_mm_id->u.mm_fd; - else from = -1; + if(from_mm) + from_fd = from_mm->id.u.mm_fd; + else from_fd = -1; - ret = new_mm(from, stack); + ret = new_mm(from_fd, stack); if(ret < 0){ printk("init_new_context_skas - new_mm failed, " "errno = %d\n", ret); goto out_free; } - mm_id->u.mm_fd = ret; + to_mm->id.u.mm_fd = ret; } else { - if((cur_mm != NULL) && (cur_mm != &init_mm)) - mm_id->u.pid = copy_context_skas0(stack, - cur_mm_id->u.pid); - else mm_id->u.pid = start_userspace(stack); + if(from_mm) + to_mm->id.u.pid = copy_context_skas0(stack, + from_mm->id.u.pid); + else to_mm->id.u.pid = start_userspace(stack); + } + + ret = init_new_ldt(to_mm, from_mm); + if(ret < 0){ + printk("init_new_context_skas - init_ldt" + " failed, errno = %d\n", ret); + goto out_free; } return 0; out_free: - if(mm_id->stack != 0) - free_page(mm_id->stack); + if(to_mm->id.stack != 0) + free_page(to_mm->id.stack); out: return ret; } diff --git a/arch/um/kernel/skas/process.c b/arch/um/kernel/skas/process.c index 5cd0e9929789..599d679bd4fc 100644 --- a/arch/um/kernel/skas/process.c +++ b/arch/um/kernel/skas/process.c @@ -69,6 +69,17 @@ void wait_stub_done(int pid, int sig, char * fname) if((n < 0) || !WIFSTOPPED(status) || (WSTOPSIG(status) != SIGUSR1 && WSTOPSIG(status) != SIGTRAP)){ + unsigned long regs[FRAME_SIZE]; + if(ptrace(PTRACE_GETREGS, pid, 0, regs) < 0) + printk("Failed to get registers from stub, " + "errno = %d\n", errno); + else { + int i; + + printk("Stub registers -\n"); + for(i = 0; i < FRAME_SIZE; i++) + printk("\t%d - %lx\n", i, regs[i]); + } panic("%s : failed to wait for SIGUSR1/SIGTRAP, " "pid = %d, n = %d, errno = %d, status = 0x%x\n", fname, pid, n, errno, status); @@ -370,9 +381,9 @@ int copy_context_skas0(unsigned long new_stack, int pid) } /* - * This is used only, if proc_mm is available, while PTRACE_FAULTINFO - * isn't. Opening /proc/mm creates a new mm_context, which lacks the stub-pages - * Thus, we map them using /proc/mm-fd + * This is used only, if stub pages are needed, while proc_mm is + * availabl. Opening /proc/mm creates a new mm_context, which lacks + * the stub-pages. Thus, we map them using /proc/mm-fd */ void map_stub_pages(int fd, unsigned long code, unsigned long data, unsigned long stack) diff --git a/arch/um/kernel/skas/process_kern.c b/arch/um/kernel/skas/process_kern.c index efe92e8aa2a9..9c990253966c 100644 --- a/arch/um/kernel/skas/process_kern.c +++ b/arch/um/kernel/skas/process_kern.c @@ -145,7 +145,7 @@ int new_mm(int from, unsigned long stack) "err = %d\n", -n); } - if(!ptrace_faultinfo) + if(skas_needs_stub) map_stub_pages(fd, CONFIG_STUB_CODE, CONFIG_STUB_DATA, stack); return(fd); diff --git a/arch/um/kernel/tt/uaccess_user.c b/arch/um/kernel/tt/uaccess_user.c index 8c220f054b61..6c92bbccb49c 100644 --- a/arch/um/kernel/tt/uaccess_user.c +++ b/arch/um/kernel/tt/uaccess_user.c @@ -10,6 +10,7 @@ #include "uml_uaccess.h" #include "task.h" #include "kern_util.h" +#include "os.h" int __do_copy_from_user(void *to, const void *from, int n, void **fault_addr, void **fault_catcher) diff --git a/arch/um/kernel/uaccess.c b/arch/um/kernel/uaccess.c new file mode 100644 index 000000000000..054e3de0784e --- /dev/null +++ b/arch/um/kernel/uaccess.c @@ -0,0 +1,30 @@ +/* + * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk) + * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +/* These are here rather than tt/uaccess.c because skas mode needs them in + * order to do SIGBUS recovery when a tmpfs mount runs out of room. + */ + +#include <linux/string.h> +#include "os.h" + +void __do_copy(void *to, const void *from, int n) +{ + memcpy(to, from, n); +} + + +int __do_copy_to_user(void *to, const void *from, int n, + void **fault_addr, void **fault_catcher) +{ + unsigned long fault; + int faulted; + + fault = __do_user_copy(to, from, n, fault_addr, fault_catcher, + __do_copy, &faulted); + if(!faulted) return(0); + else return(n - (fault - (unsigned long) to)); +} diff --git a/arch/um/kernel/uaccess_user.c b/arch/um/kernel/uaccess_user.c deleted file mode 100644 index d035257ed0af..000000000000 --- a/arch/um/kernel/uaccess_user.c +++ /dev/null @@ -1,64 +0,0 @@ -/* - * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk) - * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include <setjmp.h> -#include <string.h> - -/* These are here rather than tt/uaccess.c because skas mode needs them in - * order to do SIGBUS recovery when a tmpfs mount runs out of room. - */ - -unsigned long __do_user_copy(void *to, const void *from, int n, - void **fault_addr, void **fault_catcher, - void (*op)(void *to, const void *from, - int n), int *faulted_out) -{ - unsigned long *faddrp = (unsigned long *) fault_addr, ret; - - sigjmp_buf jbuf; - *fault_catcher = &jbuf; - if(sigsetjmp(jbuf, 1) == 0){ - (*op)(to, from, n); - ret = 0; - *faulted_out = 0; - } - else { - ret = *faddrp; - *faulted_out = 1; - } - *fault_addr = NULL; - *fault_catcher = NULL; - return ret; -} - -void __do_copy(void *to, const void *from, int n) -{ - memcpy(to, from, n); -} - - -int __do_copy_to_user(void *to, const void *from, int n, - void **fault_addr, void **fault_catcher) -{ - unsigned long fault; - int faulted; - - fault = __do_user_copy(to, from, n, fault_addr, fault_catcher, - __do_copy, &faulted); - if(!faulted) return(0); - else return(n - (fault - (unsigned long) to)); -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c index 93dc782dc1cc..142a9493912b 100644 --- a/arch/um/kernel/um_arch.c +++ b/arch/um/kernel/um_arch.c @@ -137,7 +137,7 @@ static char *argv1_end = NULL; /* Set in early boot */ static int have_root __initdata = 0; -long physmem_size = 32 * 1024 * 1024; +long long physmem_size = 32 * 1024 * 1024; void set_cmdline(char *cmd) { @@ -402,7 +402,7 @@ int linux_main(int argc, char **argv) #ifndef CONFIG_HIGHMEM highmem = 0; printf("CONFIG_HIGHMEM not enabled - physical memory shrunk " - "to %ld bytes\n", physmem_size); + "to %lu bytes\n", physmem_size); #endif } @@ -414,8 +414,8 @@ int linux_main(int argc, char **argv) setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem); if(init_maps(physmem_size, iomem_size, highmem)){ - printf("Failed to allocate mem_map for %ld bytes of physical " - "memory and %ld bytes of highmem\n", physmem_size, + printf("Failed to allocate mem_map for %lu bytes of physical " + "memory and %lu bytes of highmem\n", physmem_size, highmem); exit(1); } @@ -426,7 +426,7 @@ int linux_main(int argc, char **argv) end_vm = start_vm + virtmem_size; if(virtmem_size < physmem_size) - printf("Kernel virtual memory size shrunk to %ld bytes\n", + printf("Kernel virtual memory size shrunk to %lu bytes\n", virtmem_size); uml_postsetup(); diff --git a/arch/um/kernel/user_util.c b/arch/um/kernel/user_util.c index 41d17c71511c..4c231161f257 100644 --- a/arch/um/kernel/user_util.c +++ b/arch/um/kernel/user_util.c @@ -27,7 +27,6 @@ #include "user.h" #include "mem_user.h" #include "init.h" -#include "helper.h" #include "ptrace_user.h" #include "uml-config.h" diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile index d15ec2af6a22..b83ac8e21c35 100644 --- a/arch/um/os-Linux/Makefile +++ b/arch/um/os-Linux/Makefile @@ -3,11 +3,12 @@ # Licensed under the GPL # -obj-y = aio.o elf_aux.o file.o mem.o process.o signal.o start_up.o time.o \ - tt.o tty.o user_syms.o drivers/ sys-$(SUBARCH)/ +obj-y = aio.o elf_aux.o file.o helper.o main.o mem.o process.o signal.o \ + start_up.o time.o tt.o tty.o uaccess.o user_syms.o drivers/ \ + sys-$(SUBARCH)/ -USER_OBJS := aio.o elf_aux.o file.o mem.o process.o signal.o start_up.o \ - time.o tt.o tty.o +USER_OBJS := aio.o elf_aux.o file.o helper.o main.o mem.o process.o signal.o \ + start_up.o time.o tt.o tty.o uaccess.o elf_aux.o: $(ARCH_DIR)/kernel-offsets.h CFLAGS_elf_aux.o += -I$(objtree)/arch/um diff --git a/arch/um/os-Linux/aio.c b/arch/um/os-Linux/aio.c index 41cfb0944201..ffa759addd3c 100644 --- a/arch/um/os-Linux/aio.c +++ b/arch/um/os-Linux/aio.c @@ -10,7 +10,6 @@ #include <sched.h> #include <sys/syscall.h> #include "os.h" -#include "helper.h" #include "aio.h" #include "init.h" #include "user.h" diff --git a/arch/um/os-Linux/drivers/ethertap_user.c b/arch/um/os-Linux/drivers/ethertap_user.c index cd4d6544da71..901b85e8a1c6 100644 --- a/arch/um/os-Linux/drivers/ethertap_user.c +++ b/arch/um/os-Linux/drivers/ethertap_user.c @@ -19,7 +19,6 @@ #include "user_util.h" #include "net_user.h" #include "etap.h" -#include "helper.h" #include "os.h" #define MAX_PACKET ETH_MAX_PACKET diff --git a/arch/um/os-Linux/drivers/tuntap_user.c b/arch/um/os-Linux/drivers/tuntap_user.c index 4ba9b17adf13..52945338b64d 100644 --- a/arch/um/os-Linux/drivers/tuntap_user.c +++ b/arch/um/os-Linux/drivers/tuntap_user.c @@ -20,7 +20,6 @@ #include "kern_util.h" #include "user_util.h" #include "user.h" -#include "helper.h" #include "os.h" #define MAX_PACKET ETH_MAX_PACKET diff --git a/arch/um/kernel/helper.c b/arch/um/os-Linux/helper.c index 33fb0bd3b11a..36cc8475bcda 100644 --- a/arch/um/kernel/helper.c +++ b/arch/um/os-Linux/helper.c @@ -1,4 +1,4 @@ -/* +/* * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) * Licensed under the GPL */ @@ -13,7 +13,6 @@ #include "user.h" #include "kern_util.h" #include "user_util.h" -#include "helper.h" #include "os.h" struct helper_data { @@ -46,7 +45,7 @@ static int helper_child(void *arg) errval = errno; printk("execvp of '%s' failed - errno = %d\n", argv[0], errno); os_write_file(data->fd, &errval, sizeof(errval)); - os_kill_process(os_getpid(), 0); + kill(os_getpid(), SIGKILL); return(0); } @@ -90,7 +89,7 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv, goto out_close; } - os_close_file(fds[1]); + close(fds[1]); fds[1] = -1; /*Read the errno value from the child.*/ @@ -98,7 +97,8 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv, if(n < 0){ printk("run_helper : read on pipe failed, ret = %d\n", -n); ret = n; - os_kill_process(pid, 1); + kill(pid, SIGKILL); + CATCH_EINTR(waitpid(pid, NULL, 0)); } else if(n != 0){ CATCH_EINTR(n = waitpid(pid, NULL, 0)); @@ -109,8 +109,8 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv, out_close: if (fds[1] != -1) - os_close_file(fds[1]); - os_close_file(fds[0]); + close(fds[1]); + close(fds[0]); out_free: if(stack_out == NULL) free_stack(stack, 0); @@ -118,7 +118,7 @@ out_free: return(ret); } -int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags, +int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags, unsigned long *stack_out, int stack_order) { unsigned long stack, sp; @@ -131,7 +131,7 @@ int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags, pid = clone(proc, (void *) sp, flags | SIGCHLD, arg); if(pid < 0){ err = -errno; - printk("run_helper_thread : clone failed, errno = %d\n", + printk("run_helper_thread : clone failed, errno = %d\n", errno); return err; } diff --git a/arch/um/kernel/main.c b/arch/um/os-Linux/main.c index d31027f0fe39..23da27d22569 100644 --- a/arch/um/kernel/main.c +++ b/arch/um/os-Linux/main.c @@ -157,25 +157,25 @@ int main(int argc, char **argv, char **envp) */ change_sig(SIGPROF, 0); - /* This signal stuff used to be in the reboot case. However, - * sometimes a SIGVTALRM can come in when we're halting (reproducably - * when writing out gcov information, presumably because that takes - * some time) and cause a segfault. - */ - - /* stop timers and set SIG*ALRM to be ignored */ - disable_timer(); - - /* disable SIGIO for the fds and set SIGIO to be ignored */ - err = deactivate_all_fds(); - if(err) - printf("deactivate_all_fds failed, errno = %d\n", -err); - - /* Let any pending signals fire now. This ensures - * that they won't be delivered after the exec, when - * they are definitely not expected. - */ - unblock_signals(); + /* This signal stuff used to be in the reboot case. However, + * sometimes a SIGVTALRM can come in when we're halting (reproducably + * when writing out gcov information, presumably because that takes + * some time) and cause a segfault. + */ + + /* stop timers and set SIG*ALRM to be ignored */ + disable_timer(); + + /* disable SIGIO for the fds and set SIGIO to be ignored */ + err = deactivate_all_fds(); + if(err) + printf("deactivate_all_fds failed, errno = %d\n", -err); + + /* Let any pending signals fire now. This ensures + * that they won't be delivered after the exec, when + * they are definitely not expected. + */ + unblock_signals(); /* Reboot */ if(ret){ @@ -257,14 +257,3 @@ void __wrap_free(void *ptr) } else __real_free(ptr); } - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/os-Linux/mem.c b/arch/um/os-Linux/mem.c index 8e71edaaf80b..9d7d69a523bb 100644 --- a/arch/um/os-Linux/mem.c +++ b/arch/um/os-Linux/mem.c @@ -88,7 +88,7 @@ int make_tempfile(const char *template, char **out_tempname, int do_unlink) * This proc is used in start_up.c * So it isn't 'static'. */ -int create_tmp_file(unsigned long len) +int create_tmp_file(unsigned long long len) { int fd, err; char zero; @@ -121,7 +121,7 @@ int create_tmp_file(unsigned long len) return(fd); } -static int create_anon_file(unsigned long len) +static int create_anon_file(unsigned long long len) { void *addr; int fd; @@ -144,7 +144,7 @@ static int create_anon_file(unsigned long len) extern int have_devanon; -int create_mem_file(unsigned long len) +int create_mem_file(unsigned long long len) { int err, fd; diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c index b99ab414542f..37517d49c4ae 100644 --- a/arch/um/os-Linux/start_up.c +++ b/arch/um/os-Linux/start_up.c @@ -135,7 +135,9 @@ static int stop_ptraced_child(int pid, void *stack, int exitcode, } int ptrace_faultinfo = 1; +int ptrace_ldt = 1; int proc_mm = 1; +int skas_needs_stub = 0; static int __init skas0_cmd_param(char *str, int* add) { @@ -294,7 +296,7 @@ static void __init check_ptrace(void) check_sysemu(); } -extern int create_tmp_file(unsigned long len); +extern int create_tmp_file(unsigned long long len); static void check_tmpexec(void) { @@ -352,14 +354,26 @@ __uml_setup("noptracefaultinfo", noptracefaultinfo_cmd_param, " it. To support PTRACE_FAULTINFO, the host needs to be patched\n" " using the current skas3 patch.\n\n"); +static int __init noptraceldt_cmd_param(char *str, int* add) +{ + ptrace_ldt = 0; + return 0; +} + +__uml_setup("noptraceldt", noptraceldt_cmd_param, +"noptraceldt\n" +" Turns off usage of PTRACE_LDT, even if host supports it.\n" +" To support PTRACE_LDT, the host needs to be patched using\n" +" the current skas3 patch.\n\n"); + #ifdef UML_CONFIG_MODE_SKAS -static inline void check_skas3_ptrace_support(void) +static inline void check_skas3_ptrace_faultinfo(void) { struct ptrace_faultinfo fi; void *stack; int pid, n; - printf("Checking for the skas3 patch in the host..."); + printf(" - PTRACE_FAULTINFO..."); pid = start_ptraced_child(&stack); n = ptrace(PTRACE_FAULTINFO, pid, 0, &fi); @@ -381,9 +395,49 @@ static inline void check_skas3_ptrace_support(void) stop_ptraced_child(pid, stack, 1, 1); } -int can_do_skas(void) +static inline void check_skas3_ptrace_ldt(void) +{ +#ifdef PTRACE_LDT + void *stack; + int pid, n; + unsigned char ldtbuf[40]; + struct ptrace_ldt ldt_op = (struct ptrace_ldt) { + .func = 2, /* read default ldt */ + .ptr = ldtbuf, + .bytecount = sizeof(ldtbuf)}; + + printf(" - PTRACE_LDT..."); + pid = start_ptraced_child(&stack); + + n = ptrace(PTRACE_LDT, pid, 0, (unsigned long) &ldt_op); + if (n < 0) { + if(errno == EIO) + printf("not found\n"); + else { + perror("not found"); + } + ptrace_ldt = 0; + } + else { + if(ptrace_ldt) + printf("found\n"); + else + printf("found, but use is disabled\n"); + } + + stop_ptraced_child(pid, stack, 1, 1); +#else + /* PTRACE_LDT might be disabled via cmdline option. + * We want to override this, else we might use the stub + * without real need + */ + ptrace_ldt = 1; +#endif +} + +static inline void check_skas3_proc_mm(void) { - printf("Checking for /proc/mm..."); + printf(" - /proc/mm..."); if (os_access("/proc/mm", OS_ACC_W_OK) < 0) { proc_mm = 0; printf("not found\n"); @@ -394,8 +448,19 @@ int can_do_skas(void) else printf("found\n"); } +} + +int can_do_skas(void) +{ + printf("Checking for the skas3 patch in the host:\n"); + + check_skas3_proc_mm(); + check_skas3_ptrace_faultinfo(); + check_skas3_ptrace_ldt(); + + if(!proc_mm || !ptrace_faultinfo || !ptrace_ldt) + skas_needs_stub = 1; - check_skas3_ptrace_support(); return 1; } #else diff --git a/arch/um/os-Linux/uaccess.c b/arch/um/os-Linux/uaccess.c new file mode 100644 index 000000000000..38d710158c3d --- /dev/null +++ b/arch/um/os-Linux/uaccess.c @@ -0,0 +1,32 @@ +/* + * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk) + * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#include <setjmp.h> +#include <string.h> + +unsigned long __do_user_copy(void *to, const void *from, int n, + void **fault_addr, void **fault_catcher, + void (*op)(void *to, const void *from, + int n), int *faulted_out) +{ + unsigned long *faddrp = (unsigned long *) fault_addr, ret; + + sigjmp_buf jbuf; + *fault_catcher = &jbuf; + if(sigsetjmp(jbuf, 1) == 0){ + (*op)(to, from, n); + ret = 0; + *faulted_out = 0; + } + else { + ret = *faddrp; + *faulted_out = 1; + } + *fault_addr = NULL; + *fault_catcher = NULL; + return ret; +} + diff --git a/arch/um/scripts/Makefile.rules b/arch/um/scripts/Makefile.rules index 651d9d88b656..b3fbf125709b 100644 --- a/arch/um/scripts/Makefile.rules +++ b/arch/um/scripts/Makefile.rules @@ -26,8 +26,13 @@ define unprofile $(patsubst -pg,,$(patsubst -fprofile-arcs -ftest-coverage,,$(1))) endef +# cmd_make_link checks to see if the $(foo-dir) variable starts with a /. If +# so, it's considered to be a path relative to $(srcdir) rather than +# $(srcdir)/arch/$(SUBARCH). This is because x86_64 wants to get ldt.c from +# arch/um/sys-i386 rather than arch/i386 like the other borrowed files. So, +# it sets $(ldt.c-dir) to /arch/um/sys-i386. quiet_cmd_make_link = SYMLINK $@ -cmd_make_link = ln -sf $(srctree)/arch/$(SUBARCH)/$($(notdir $@)-dir)/$(notdir $@) $@ +cmd_make_link = rm -f $@; ln -sf $(srctree)$(if $(filter-out /%,$($(notdir $@)-dir)),/arch/$(SUBARCH))/$($(notdir $@)-dir)/$(notdir $@) $@ # this needs to be before the foreach, because targets does not accept # complete paths like $(obj)/$(f). To make sure this works, use a := assignment diff --git a/arch/um/sys-i386/ldt.c b/arch/um/sys-i386/ldt.c index 36b5c2c13289..6360f1c958d0 100644 --- a/arch/um/sys-i386/ldt.c +++ b/arch/um/sys-i386/ldt.c @@ -3,53 +3,26 @@ * Licensed under the GPL */ +#include "linux/stddef.h" #include "linux/config.h" #include "linux/sched.h" #include "linux/slab.h" #include "linux/types.h" +#include "linux/errno.h" #include "asm/uaccess.h" -#include "asm/ptrace.h" #include "asm/smp.h" #include "asm/ldt.h" +#include "asm/unistd.h" #include "choose-mode.h" #include "kern.h" #include "mode_kern.h" -#ifdef CONFIG_MODE_TT - extern int modify_ldt(int func, void *ptr, unsigned long bytecount); -static int do_modify_ldt_tt(int func, void *ptr, unsigned long bytecount) -{ - return modify_ldt(func, ptr, bytecount); -} - -#endif - -#ifdef CONFIG_MODE_SKAS - -#include "skas.h" -#include "skas_ptrace.h" - -static int do_modify_ldt_skas(int func, void *ptr, unsigned long bytecount) -{ - struct ptrace_ldt ldt; - u32 cpu; - int res; - - ldt = ((struct ptrace_ldt) { .func = func, - .ptr = ptr, - .bytecount = bytecount }); - - cpu = get_cpu(); - res = ptrace(PTRACE_LDT, userspace_pid[cpu], 0, (unsigned long) &ldt); - put_cpu(); - - return res; -} -#endif +#ifdef CONFIG_MODE_TT -int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount) +static long do_modify_ldt_tt(int func, void __user *ptr, + unsigned long bytecount) { struct user_desc info; int res = 0; @@ -89,8 +62,7 @@ int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount) goto out; } - res = CHOOSE_MODE_PROC(do_modify_ldt_tt, do_modify_ldt_skas, func, - p, bytecount); + res = modify_ldt(func, p, bytecount); if(res < 0) goto out; @@ -108,3 +80,467 @@ out: kfree(buf); return res; } + +#endif + +#ifdef CONFIG_MODE_SKAS + +#include "skas.h" +#include "skas_ptrace.h" +#include "asm/mmu_context.h" + +long write_ldt_entry(struct mm_id * mm_idp, int func, struct user_desc * desc, + void **addr, int done) +{ + long res; + + if(proc_mm){ + /* This is a special handling for the case, that the mm to + * modify isn't current->active_mm. + * If this is called directly by modify_ldt, + * (current->active_mm->context.skas.u == mm_idp) + * will be true. So no call to switch_mm_skas(mm_idp) is done. + * If this is called in case of init_new_ldt or PTRACE_LDT, + * mm_idp won't belong to current->active_mm, but child->mm. + * So we need to switch child's mm into our userspace, then + * later switch back. + * + * Note: I'm unshure: should interrupts be disabled here? + */ + if(!current->active_mm || current->active_mm == &init_mm || + mm_idp != ¤t->active_mm->context.skas.id) + switch_mm_skas(mm_idp); + } + + if(ptrace_ldt) { + struct ptrace_ldt ldt_op = (struct ptrace_ldt) { + .func = func, + .ptr = desc, + .bytecount = sizeof(*desc)}; + u32 cpu; + int pid; + + if(!proc_mm) + pid = mm_idp->u.pid; + else { + cpu = get_cpu(); + pid = userspace_pid[cpu]; + } + + res = ptrace(PTRACE_LDT, pid, 0, (unsigned long) &ldt_op); + if(res) + res = errno; + + if(proc_mm) + put_cpu(); + } + else { + void *stub_addr; + res = syscall_stub_data(mm_idp, (unsigned long *)desc, + (sizeof(*desc) + sizeof(long) - 1) & + ~(sizeof(long) - 1), + addr, &stub_addr); + if(!res){ + unsigned long args[] = { func, + (unsigned long)stub_addr, + sizeof(*desc), + 0, 0, 0 }; + res = run_syscall_stub(mm_idp, __NR_modify_ldt, args, + 0, addr, done); + } + } + + if(proc_mm){ + /* This is the second part of special handling, that makes + * PTRACE_LDT possible to implement. + */ + if(current->active_mm && current->active_mm != &init_mm && + mm_idp != ¤t->active_mm->context.skas.id) + switch_mm_skas(¤t->active_mm->context.skas.id); + } + + return res; +} + +static long read_ldt_from_host(void __user * ptr, unsigned long bytecount) +{ + int res, n; + struct ptrace_ldt ptrace_ldt = (struct ptrace_ldt) { + .func = 0, + .bytecount = bytecount, + .ptr = (void *)kmalloc(bytecount, GFP_KERNEL)}; + u32 cpu; + + if(ptrace_ldt.ptr == NULL) + return -ENOMEM; + + /* This is called from sys_modify_ldt only, so userspace_pid gives + * us the right number + */ + + cpu = get_cpu(); + res = ptrace(PTRACE_LDT, userspace_pid[cpu], 0, + (unsigned long) &ptrace_ldt); + put_cpu(); + if(res < 0) + goto out; + + n = copy_to_user(ptr, ptrace_ldt.ptr, res); + if(n != 0) + res = -EFAULT; + + out: + kfree(ptrace_ldt.ptr); + + return res; +} + +/* + * In skas mode, we hold our own ldt data in UML. + * Thus, the code implementing sys_modify_ldt_skas + * is very similar to (and mostly stolen from) sys_modify_ldt + * for arch/i386/kernel/ldt.c + * The routines copied and modified in part are: + * - read_ldt + * - read_default_ldt + * - write_ldt + * - sys_modify_ldt_skas + */ + +static int read_ldt(void __user * ptr, unsigned long bytecount) +{ + int i, err = 0; + unsigned long size; + uml_ldt_t * ldt = ¤t->mm->context.skas.ldt; + + if(!ldt->entry_count) + goto out; + if(bytecount > LDT_ENTRY_SIZE*LDT_ENTRIES) + bytecount = LDT_ENTRY_SIZE*LDT_ENTRIES; + err = bytecount; + + if(ptrace_ldt){ + return read_ldt_from_host(ptr, bytecount); + } + + down(&ldt->semaphore); + if(ldt->entry_count <= LDT_DIRECT_ENTRIES){ + size = LDT_ENTRY_SIZE*LDT_DIRECT_ENTRIES; + if(size > bytecount) + size = bytecount; + if(copy_to_user(ptr, ldt->entries, size)) + err = -EFAULT; + bytecount -= size; + ptr += size; + } + else { + for(i=0; i<ldt->entry_count/LDT_ENTRIES_PER_PAGE && bytecount; + i++){ + size = PAGE_SIZE; + if(size > bytecount) + size = bytecount; + if(copy_to_user(ptr, ldt->pages[i], size)){ + err = -EFAULT; + break; + } + bytecount -= size; + ptr += size; + } + } + up(&ldt->semaphore); + + if(bytecount == 0 || err == -EFAULT) + goto out; + + if(clear_user(ptr, bytecount)) + err = -EFAULT; + +out: + return err; +} + +static int read_default_ldt(void __user * ptr, unsigned long bytecount) +{ + int err; + + if(bytecount > 5*LDT_ENTRY_SIZE) + bytecount = 5*LDT_ENTRY_SIZE; + + err = bytecount; + /* UML doesn't support lcall7 and lcall27. + * So, we don't really have a default ldt, but emulate + * an empty ldt of common host default ldt size. + */ + if(clear_user(ptr, bytecount)) + err = -EFAULT; + + return err; +} + +static int write_ldt(void __user * ptr, unsigned long bytecount, int func) +{ + uml_ldt_t * ldt = ¤t->mm->context.skas.ldt; + struct mm_id * mm_idp = ¤t->mm->context.skas.id; + int i, err; + struct user_desc ldt_info; + struct ldt_entry entry0, *ldt_p; + void *addr = NULL; + + err = -EINVAL; + if(bytecount != sizeof(ldt_info)) + goto out; + err = -EFAULT; + if(copy_from_user(&ldt_info, ptr, sizeof(ldt_info))) + goto out; + + err = -EINVAL; + if(ldt_info.entry_number >= LDT_ENTRIES) + goto out; + if(ldt_info.contents == 3){ + if (func == 1) + goto out; + if (ldt_info.seg_not_present == 0) + goto out; + } + + if(!ptrace_ldt) + down(&ldt->semaphore); + + err = write_ldt_entry(mm_idp, func, &ldt_info, &addr, 1); + if(err) + goto out_unlock; + else if(ptrace_ldt) { + /* With PTRACE_LDT available, this is used as a flag only */ + ldt->entry_count = 1; + goto out; + } + + if(ldt_info.entry_number >= ldt->entry_count && + ldt_info.entry_number >= LDT_DIRECT_ENTRIES){ + for(i=ldt->entry_count/LDT_ENTRIES_PER_PAGE; + i*LDT_ENTRIES_PER_PAGE <= ldt_info.entry_number; + i++){ + if(i == 0) + memcpy(&entry0, ldt->entries, sizeof(entry0)); + ldt->pages[i] = (struct ldt_entry *) + __get_free_page(GFP_KERNEL|__GFP_ZERO); + if(!ldt->pages[i]){ + err = -ENOMEM; + /* Undo the change in host */ + memset(&ldt_info, 0, sizeof(ldt_info)); + write_ldt_entry(mm_idp, 1, &ldt_info, &addr, 1); + goto out_unlock; + } + if(i == 0) { + memcpy(ldt->pages[0], &entry0, sizeof(entry0)); + memcpy(ldt->pages[0]+1, ldt->entries+1, + sizeof(entry0)*(LDT_DIRECT_ENTRIES-1)); + } + ldt->entry_count = (i + 1) * LDT_ENTRIES_PER_PAGE; + } + } + if(ldt->entry_count <= ldt_info.entry_number) + ldt->entry_count = ldt_info.entry_number + 1; + + if(ldt->entry_count <= LDT_DIRECT_ENTRIES) + ldt_p = ldt->entries + ldt_info.entry_number; + else + ldt_p = ldt->pages[ldt_info.entry_number/LDT_ENTRIES_PER_PAGE] + + ldt_info.entry_number%LDT_ENTRIES_PER_PAGE; + + if(ldt_info.base_addr == 0 && ldt_info.limit == 0 && + (func == 1 || LDT_empty(&ldt_info))){ + ldt_p->a = 0; + ldt_p->b = 0; + } + else{ + if (func == 1) + ldt_info.useable = 0; + ldt_p->a = LDT_entry_a(&ldt_info); + ldt_p->b = LDT_entry_b(&ldt_info); + } + err = 0; + +out_unlock: + up(&ldt->semaphore); +out: + return err; +} + +static long do_modify_ldt_skas(int func, void __user *ptr, + unsigned long bytecount) +{ + int ret = -ENOSYS; + + switch (func) { + case 0: + ret = read_ldt(ptr, bytecount); + break; + case 1: + case 0x11: + ret = write_ldt(ptr, bytecount, func); + break; + case 2: + ret = read_default_ldt(ptr, bytecount); + break; + } + return ret; +} + +short dummy_list[9] = {0, -1}; +short * host_ldt_entries = NULL; + +void ldt_get_host_info(void) +{ + long ret; + struct ldt_entry * ldt; + int i, size, k, order; + + host_ldt_entries = dummy_list+1; + + for(i = LDT_PAGES_MAX-1, order=0; i; i>>=1, order++); + + ldt = (struct ldt_entry *) + __get_free_pages(GFP_KERNEL|__GFP_ZERO, order); + if(ldt == NULL) { + printk("ldt_get_host_info: couldn't allocate buffer for host ldt\n"); + return; + } + + ret = modify_ldt(0, ldt, (1<<order)*PAGE_SIZE); + if(ret < 0) { + printk("ldt_get_host_info: couldn't read host ldt\n"); + goto out_free; + } + if(ret == 0) { + /* default_ldt is active, simply write an empty entry 0 */ + host_ldt_entries = dummy_list; + goto out_free; + } + + for(i=0, size=0; i<ret/LDT_ENTRY_SIZE; i++){ + if(ldt[i].a != 0 || ldt[i].b != 0) + size++; + } + + if(size < sizeof(dummy_list)/sizeof(dummy_list[0])) { + host_ldt_entries = dummy_list; + } + else { + size = (size + 1) * sizeof(dummy_list[0]); + host_ldt_entries = (short *)kmalloc(size, GFP_KERNEL); + if(host_ldt_entries == NULL) { + printk("ldt_get_host_info: couldn't allocate host ldt list\n"); + goto out_free; + } + } + + for(i=0, k=0; i<ret/LDT_ENTRY_SIZE; i++){ + if(ldt[i].a != 0 || ldt[i].b != 0) { + host_ldt_entries[k++] = i; + } + } + host_ldt_entries[k] = -1; + +out_free: + free_pages((unsigned long)ldt, order); +} + +long init_new_ldt(struct mmu_context_skas * new_mm, + struct mmu_context_skas * from_mm) +{ + struct user_desc desc; + short * num_p; + int i; + long page, err=0; + void *addr = NULL; + + memset(&desc, 0, sizeof(desc)); + + if(!ptrace_ldt) + init_MUTEX(&new_mm->ldt.semaphore); + + if(!from_mm){ + /* + * We have to initialize a clean ldt. + */ + if(proc_mm) { + /* + * If the new mm was created using proc_mm, host's + * default-ldt currently is assigned, which normally + * contains the call-gates for lcall7 and lcall27. + * To remove these gates, we simply write an empty + * entry as number 0 to the host. + */ + err = write_ldt_entry(&new_mm->id, 1, &desc, + &addr, 1); + } + else{ + /* + * Now we try to retrieve info about the ldt, we + * inherited from the host. All ldt-entries found + * will be reset in the following loop + */ + if(host_ldt_entries == NULL) + ldt_get_host_info(); + for(num_p=host_ldt_entries; *num_p != -1; num_p++){ + desc.entry_number = *num_p; + err = write_ldt_entry(&new_mm->id, 1, &desc, + &addr, *(num_p + 1) == -1); + if(err) + break; + } + } + new_mm->ldt.entry_count = 0; + } + else if (!ptrace_ldt) { + /* Our local LDT is used to supply the data for + * modify_ldt(READLDT), if PTRACE_LDT isn't available, + * i.e., we have to use the stub for modify_ldt, which + * can't handle the big read buffer of up to 64kB. + */ + down(&from_mm->ldt.semaphore); + if(from_mm->ldt.entry_count <= LDT_DIRECT_ENTRIES){ + memcpy(new_mm->ldt.entries, from_mm->ldt.entries, + sizeof(new_mm->ldt.entries)); + } + else{ + i = from_mm->ldt.entry_count / LDT_ENTRIES_PER_PAGE; + while(i-->0){ + page = __get_free_page(GFP_KERNEL|__GFP_ZERO); + if (!page){ + err = -ENOMEM; + break; + } + new_mm->ldt.pages[i] = (struct ldt_entry*)page; + memcpy(new_mm->ldt.pages[i], + from_mm->ldt.pages[i], PAGE_SIZE); + } + } + new_mm->ldt.entry_count = from_mm->ldt.entry_count; + up(&from_mm->ldt.semaphore); + } + + return err; +} + + +void free_ldt(struct mmu_context_skas * mm) +{ + int i; + + if(!ptrace_ldt && mm->ldt.entry_count > LDT_DIRECT_ENTRIES){ + i = mm->ldt.entry_count / LDT_ENTRIES_PER_PAGE; + while(i-- > 0){ + free_page((long )mm->ldt.pages[i]); + } + } + mm->ldt.entry_count = 0; +} +#endif + +int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount) +{ + return(CHOOSE_MODE_PROC(do_modify_ldt_tt, do_modify_ldt_skas, func, + ptr, bytecount)); +} diff --git a/arch/um/sys-x86_64/Makefile b/arch/um/sys-x86_64/Makefile index 06c3633457a2..ea977df395a1 100644 --- a/arch/um/sys-x86_64/Makefile +++ b/arch/um/sys-x86_64/Makefile @@ -5,7 +5,7 @@ # #XXX: why into lib-y? -lib-y = bitops.o bugs.o csum-partial.o delay.o fault.o mem.o memcpy.o \ +lib-y = bitops.o bugs.o csum-partial.o delay.o fault.o ldt.o mem.o memcpy.o \ ptrace.o ptrace_user.o sigcontext.o signal.o stub.o \ stub_segv.o syscalls.o syscall_table.o sysrq.o thunk.o @@ -14,7 +14,7 @@ obj-$(CONFIG_MODULES) += module.o um_module.o USER_OBJS := ptrace_user.o sigcontext.o -SYMLINKS = bitops.c csum-copy.S csum-partial.c csum-wrappers.c memcpy.S \ +SYMLINKS = bitops.c csum-copy.S csum-partial.c csum-wrappers.c ldt.c memcpy.S \ thunk.S module.c include arch/um/scripts/Makefile.rules @@ -23,6 +23,7 @@ bitops.c-dir = lib csum-copy.S-dir = lib csum-partial.c-dir = lib csum-wrappers.c-dir = lib +ldt.c-dir = /arch/um/sys-i386 memcpy.S-dir = lib thunk.S-dir = lib module.c-dir = kernel diff --git a/arch/um/sys-x86_64/syscalls.c b/arch/um/sys-x86_64/syscalls.c index 3259a4db4534..6acee5c4ada6 100644 --- a/arch/um/sys-x86_64/syscalls.c +++ b/arch/um/sys-x86_64/syscalls.c @@ -29,81 +29,6 @@ asmlinkage long sys_uname64(struct new_utsname __user * name) } #ifdef CONFIG_MODE_TT -extern int modify_ldt(int func, void *ptr, unsigned long bytecount); - -long sys_modify_ldt_tt(int func, void *ptr, unsigned long bytecount) -{ - /* XXX This should check VERIFY_WRITE depending on func, check this - * in i386 as well. - */ - if (!access_ok(VERIFY_READ, ptr, bytecount)) - return -EFAULT; - return(modify_ldt(func, ptr, bytecount)); -} -#endif - -#ifdef CONFIG_MODE_SKAS -extern int userspace_pid[]; - -#include "skas_ptrace.h" - -long sys_modify_ldt_skas(int func, void *ptr, unsigned long bytecount) -{ - struct ptrace_ldt ldt; - void *buf; - int res, n; - - buf = kmalloc(bytecount, GFP_KERNEL); - if(buf == NULL) - return(-ENOMEM); - - res = 0; - - switch(func){ - case 1: - case 0x11: - res = copy_from_user(buf, ptr, bytecount); - break; - } - - if(res != 0){ - res = -EFAULT; - goto out; - } - - ldt = ((struct ptrace_ldt) { .func = func, - .ptr = buf, - .bytecount = bytecount }); -#warning Need to look up userspace_pid by cpu - res = ptrace(PTRACE_LDT, userspace_pid[0], 0, (unsigned long) &ldt); - if(res < 0) - goto out; - - switch(func){ - case 0: - case 2: - n = res; - res = copy_to_user(ptr, buf, n); - if(res != 0) - res = -EFAULT; - else - res = n; - break; - } - - out: - kfree(buf); - return(res); -} -#endif - -long sys_modify_ldt(int func, void *ptr, unsigned long bytecount) -{ - return(CHOOSE_MODE_PROC(sys_modify_ldt_tt, sys_modify_ldt_skas, func, - ptr, bytecount)); -} - -#ifdef CONFIG_MODE_TT extern long arch_prctl(int code, unsigned long addr); static long arch_prctl_tt(int code, unsigned long addr) |
