diff options
38 files changed, 853 insertions, 265 deletions
diff --git a/arch/um/Kconfig_i386 b/arch/um/Kconfig_i386 index e41f3748d30..27c18a8d9d1 100644 --- a/arch/um/Kconfig_i386 +++ b/arch/um/Kconfig_i386 @@ -19,6 +19,18 @@ config 3_LEVEL_PGTABLES memory. All the memory that can't be mapped directly will be treated as high memory. +config STUB_CODE + hex + default 0xbfffe000 + +config STUB_DATA + hex + default 0xbffff000 + +config STUB_START + hex + default STUB_CODE + config ARCH_HAS_SC_SIGNALS bool default y diff --git a/arch/um/Kconfig_x86_64 b/arch/um/Kconfig_x86_64 index f162f50f0b1..735a047c890 100644 --- a/arch/um/Kconfig_x86_64 +++ b/arch/um/Kconfig_x86_64 @@ -14,6 +14,18 @@ config 3_LEVEL_PGTABLES bool default y +config STUB_CODE + hex + default 0x7fbfffe000 + +config STUB_DATA + hex + default 0x7fbffff000 + +config STUB_START + hex + default STUB_CODE + config ARCH_HAS_SC_SIGNALS bool default n diff --git a/arch/um/Makefile-i386 b/arch/um/Makefile-i386 index 29e182d5a83..301059062a3 100644 --- a/arch/um/Makefile-i386 +++ b/arch/um/Makefile-i386 @@ -8,7 +8,7 @@ ifeq ($(CONFIG_MODE_SKAS),y) endif endif -CFLAGS += -U__$(SUBARCH)__ -U$(SUBARCH) +CFLAGS += -U__$(SUBARCH)__ -U$(SUBARCH) $(STUB_CFLAGS) ARCH_USER_CFLAGS := ifneq ($(CONFIG_GPROF),y) diff --git a/arch/um/Makefile-x86_64 b/arch/um/Makefile-x86_64 index 32144562c27..d80bd0052e6 100644 --- a/arch/um/Makefile-x86_64 +++ b/arch/um/Makefile-x86_64 @@ -4,7 +4,7 @@ SUBARCH_LIBS := arch/um/sys-x86_64/ START := 0x60000000 -CFLAGS += -U__$(SUBARCH)__ -fno-builtin +CFLAGS += -U__$(SUBARCH)__ -fno-builtin $(STUB_CFLAGS) ARCH_USER_CFLAGS := -D__x86_64__ ELF_ARCH := i386:x86-64 diff --git a/arch/um/defconfig b/arch/um/defconfig index 4067c3aa5b6..80d30d19d75 100644 --- a/arch/um/defconfig +++ b/arch/um/defconfig @@ -1,7 +1,7 @@ # # Automatically generated make config: don't edit -# Linux kernel version: 2.6.12-rc3-skas3-v9-pre2 -# Sun Apr 24 19:46:10 2005 +# Linux kernel version: 2.6.12-rc6-mm1 +# Tue Jun 14 18:22:21 2005 # CONFIG_GENERIC_HARDIRQS=y CONFIG_UML=y @@ -13,23 +13,32 @@ CONFIG_GENERIC_CALIBRATE_DELAY=y # # UML-specific options # -CONFIG_MODE_TT=y +# CONFIG_MODE_TT is not set +# CONFIG_STATIC_LINK is not set CONFIG_MODE_SKAS=y CONFIG_UML_X86=y # CONFIG_64BIT is not set CONFIG_TOP_ADDR=0xc0000000 # CONFIG_3_LEVEL_PGTABLES is not set +CONFIG_STUB_CODE=0xbfffe000 +CONFIG_STUB_DATA=0xbffff000 +CONFIG_STUB_START=0xbfffe000 CONFIG_ARCH_HAS_SC_SIGNALS=y CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA=y -CONFIG_LD_SCRIPT_STATIC=y +CONFIG_SELECT_MEMORY_MODEL=y +CONFIG_FLATMEM_MANUAL=y +# CONFIG_DISCONTIGMEM_MANUAL is not set +# CONFIG_SPARSEMEM_MANUAL is not set +CONFIG_FLATMEM=y +CONFIG_FLAT_NODE_MEM_MAP=y +CONFIG_LD_SCRIPT_DYN=y CONFIG_NET=y CONFIG_BINFMT_ELF=y CONFIG_BINFMT_MISC=m -CONFIG_HOSTFS=y +# CONFIG_HOSTFS is not set CONFIG_MCONSOLE=y # CONFIG_MAGIC_SYSRQ is not set # CONFIG_HOST_2G_2G is not set -# CONFIG_SMP is not set CONFIG_NEST_LEVEL=0 CONFIG_KERNEL_HALF_GIGS=1 # CONFIG_HIGHMEM is not set @@ -63,6 +72,8 @@ CONFIG_IKCONFIG_PROC=y CONFIG_KALLSYMS=y # CONFIG_KALLSYMS_ALL is not set CONFIG_KALLSYMS_EXTRA_PASS=y +CONFIG_PRINTK=y +CONFIG_BUG=y CONFIG_BASE_FULL=y CONFIG_FUTEX=y CONFIG_EPOLL=y @@ -81,6 +92,7 @@ CONFIG_MODULES=y CONFIG_MODULE_UNLOAD=y # CONFIG_MODULE_FORCE_UNLOAD is not set CONFIG_OBSOLETE_MODPARM=y +# CONFIG_MODVERSIONS is not set # CONFIG_MODULE_SRCVERSION_ALL is not set CONFIG_KMOD=y @@ -115,6 +127,7 @@ CONFIG_UML_SOUND=m CONFIG_SOUND=m CONFIG_HOSTAUDIO=m CONFIG_UML_RANDOM=y +# CONFIG_MMAPPER is not set # # Block devices @@ -176,6 +189,17 @@ CONFIG_INET=y # CONFIG_INET_TUNNEL is not set CONFIG_IP_TCPDIAG=y # CONFIG_IP_TCPDIAG_IPV6 is not set + +# +# TCP congestion control +# +CONFIG_TCP_CONG_BIC=y +CONFIG_TCP_CONG_WESTWOOD=y +CONFIG_TCP_CONG_HTCP=y +# CONFIG_TCP_CONG_HSTCP is not set +# CONFIG_TCP_CONG_HYBLA is not set +# CONFIG_TCP_CONG_VEGAS is not set +# CONFIG_TCP_CONG_SCALABLE is not set # CONFIG_IPV6 is not set # CONFIG_NETFILTER is not set @@ -206,11 +230,15 @@ CONFIG_IP_TCPDIAG=y # Network testing # # CONFIG_NET_PKTGEN is not set +# CONFIG_KGDBOE is not set # CONFIG_NETPOLL is not set +# CONFIG_NETPOLL_RX is not set +# CONFIG_NETPOLL_TRAP is not set # CONFIG_NET_POLL_CONTROLLER is not set # CONFIG_HAMRADIO is not set # CONFIG_IRDA is not set # CONFIG_BT is not set +# CONFIG_IEEE80211 is not set CONFIG_DUMMY=m # CONFIG_BONDING is not set # CONFIG_EQUALIZER is not set @@ -227,6 +255,7 @@ CONFIG_PPP=m # CONFIG_PPP_SYNC_TTY is not set # CONFIG_PPP_DEFLATE is not set # CONFIG_PPP_BSDCOMP is not set +# CONFIG_PPP_MPPE is not set # CONFIG_PPPOE is not set CONFIG_SLIP=m # CONFIG_SLIP_COMPRESSED is not set @@ -240,10 +269,12 @@ CONFIG_SLIP=m # CONFIG_EXT2_FS=y # CONFIG_EXT2_FS_XATTR is not set +# CONFIG_EXT2_FS_XIP is not set CONFIG_EXT3_FS=y # CONFIG_EXT3_FS_XATTR is not set CONFIG_JBD=y # CONFIG_JBD_DEBUG is not set +# CONFIG_REISER4_FS is not set CONFIG_REISERFS_FS=y # CONFIG_REISERFS_CHECK is not set # CONFIG_REISERFS_PROC_INFO is not set @@ -256,6 +287,7 @@ CONFIG_REISERFS_FS=y # CONFIG_XFS_FS is not set # CONFIG_MINIX_FS is not set # CONFIG_ROMFS_FS is not set +CONFIG_INOTIFY=y CONFIG_QUOTA=y # CONFIG_QFMT_V1 is not set # CONFIG_QFMT_V2 is not set @@ -265,6 +297,12 @@ CONFIG_AUTOFS_FS=m CONFIG_AUTOFS4_FS=m # +# Caches +# +# CONFIG_FSCACHE is not set +# CONFIG_FUSE_FS is not set + +# # CD-ROM/DVD Filesystems # CONFIG_ISO9660_FS=m @@ -291,6 +329,8 @@ CONFIG_TMPFS=y # CONFIG_TMPFS_XATTR is not set # CONFIG_HUGETLB_PAGE is not set CONFIG_RAMFS=y +# CONFIG_CONFIGFS_FS is not set +# CONFIG_RELAYFS_FS is not set # # Miscellaneous filesystems @@ -319,6 +359,7 @@ CONFIG_RAMFS=y # CONFIG_NCP_FS is not set # CONFIG_CODA_FS is not set # CONFIG_AFS_FS is not set +# CONFIG_9P_FS is not set # # Partition Types @@ -404,14 +445,15 @@ CONFIG_CRC32=m # CONFIG_PRINTK_TIME is not set CONFIG_DEBUG_KERNEL=y CONFIG_LOG_BUF_SHIFT=14 +CONFIG_DETECT_SOFTLOCKUP=y # CONFIG_SCHEDSTATS is not set -# CONFIG_DEBUG_SLAB is not set +CONFIG_DEBUG_SLAB=y # CONFIG_DEBUG_SPINLOCK is not set # CONFIG_DEBUG_SPINLOCK_SLEEP is not set # CONFIG_DEBUG_KOBJECT is not set CONFIG_DEBUG_INFO=y # CONFIG_DEBUG_FS is not set CONFIG_FRAME_POINTER=y -CONFIG_PT_PROXY=y +# CONFIG_GPROF is not set # CONFIG_GCOV is not set # CONFIG_SYSCALL_DEBUG is not set diff --git a/arch/um/include/mem.h b/arch/um/include/mem.h index 10c46c38949..99d3ad4a03e 100644 --- a/arch/um/include/mem.h +++ b/arch/um/include/mem.h @@ -13,6 +13,7 @@ extern int physmem_subst_mapping(void *virt, int fd, __u64 offset, int w); extern int is_remapped(void *virt); extern int physmem_remove_mapping(void *virt); extern void physmem_forget_descriptor(int fd); +extern unsigned long to_phys(void *virt); #endif diff --git a/arch/um/include/registers.h b/arch/um/include/registers.h index 8744abb5224..0a35e6d0baa 100644 --- a/arch/um/include/registers.h +++ b/arch/um/include/registers.h @@ -14,6 +14,7 @@ extern int restore_fp_registers(int pid, unsigned long *fp_regs); extern void save_registers(int pid, union uml_pt_regs *regs); extern void restore_registers(int pid, union uml_pt_regs *regs); extern void init_registers(int pid); +extern void get_safe_registers(unsigned long * regs); #endif diff --git a/arch/um/include/sysdep-i386/ptrace_user.h b/arch/um/include/sysdep-i386/ptrace_user.h index eca8066e7a4..899aa4b2a78 100644 --- a/arch/um/include/sysdep-i386/ptrace_user.h +++ b/arch/um/include/sysdep-i386/ptrace_user.h @@ -20,11 +20,24 @@ #define PT_SYSCALL_ARG3_OFFSET PT_OFFSET(EDX) #define PT_SYSCALL_ARG4_OFFSET PT_OFFSET(ESI) #define PT_SYSCALL_ARG5_OFFSET PT_OFFSET(EDI) +#define PT_SYSCALL_ARG6_OFFSET PT_OFFSET(EBP) #define PT_SYSCALL_RET_OFFSET PT_OFFSET(EAX) +#define REGS_SYSCALL_NR EAX /* This is used before a system call */ +#define REGS_SYSCALL_ARG1 EBX +#define REGS_SYSCALL_ARG2 ECX +#define REGS_SYSCALL_ARG3 EDX +#define REGS_SYSCALL_ARG4 ESI +#define REGS_SYSCALL_ARG5 EDI +#define REGS_SYSCALL_ARG6 EBP + +#define REGS_IP_INDEX EIP +#define REGS_SP_INDEX UESP + #define PT_IP_OFFSET PT_OFFSET(EIP) #define PT_IP(regs) ((regs)[EIP]) +#define PT_SP_OFFSET PT_OFFSET(UESP) #define PT_SP(regs) ((regs)[UESP]) #ifndef FRAME_SIZE diff --git a/arch/um/include/sysdep-i386/stub.h b/arch/um/include/sysdep-i386/stub.h new file mode 100644 index 00000000000..fed9ff1cea5 --- /dev/null +++ b/arch/um/include/sysdep-i386/stub.h @@ -0,0 +1,18 @@ +/* + * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com) + * Licensed under the GPL + */ + +#ifndef __SYSDEP_STUB_H +#define __SYSDEP_STUB_H + +#include <asm/ptrace.h> +#include <asm/unistd.h> + +extern void stub_segv_handler(int sig); + +#define STUB_SYSCALL_RET EAX +#define STUB_MMAP_NR __NR_mmap2 +#define MMAP_OFFSET(o) ((o) >> PAGE_SHIFT) + +#endif diff --git a/arch/um/include/sysdep-x86_64/ptrace_user.h b/arch/um/include/sysdep-x86_64/ptrace_user.h index 31729973fb1..128faf02736 100644 --- a/arch/um/include/sysdep-x86_64/ptrace_user.h +++ b/arch/um/include/sysdep-x86_64/ptrace_user.h @@ -55,6 +55,20 @@ #define PTRACE_OLDSETOPTIONS 21 #endif +/* These are before the system call, so the the system call number is RAX + * rather than ORIG_RAX, and arg4 is R10 rather than RCX + */ +#define REGS_SYSCALL_NR PT_INDEX(RAX) +#define REGS_SYSCALL_ARG1 PT_INDEX(RDI) +#define REGS_SYSCALL_ARG2 PT_INDEX(RSI) +#define REGS_SYSCALL_ARG3 PT_INDEX(RDX) +#define REGS_SYSCALL_ARG4 PT_INDEX(R10) +#define REGS_SYSCALL_ARG5 PT_INDEX(R8) +#define REGS_SYSCALL_ARG6 PT_INDEX(R9) + +#define REGS_IP_INDEX PT_INDEX(RIP) +#define REGS_SP_INDEX PT_INDEX(RSP) + #endif /* diff --git a/arch/um/include/sysdep-x86_64/stub.h b/arch/um/include/sysdep-x86_64/stub.h new file mode 100644 index 00000000000..6b5447ad590 --- /dev/null +++ b/arch/um/include/sysdep-x86_64/stub.h @@ -0,0 +1,19 @@ +/* + * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com) + * Licensed under the GPL + */ + +#ifndef __SYSDEP_STUB_H +#define __SYSDEP_STUB_H + +#include <asm/ptrace.h> +#include <asm/unistd.h> +#include <sysdep/ptrace_user.h> + +extern void stub_segv_handler(int sig); + +#define STUB_SYSCALL_RET PT_INDEX(RAX) +#define STUB_MMAP_NR __NR_mmap +#define MMAP_OFFSET(o) (o) + +#endif diff --git a/arch/um/include/tlb.h b/arch/um/include/tlb.h index da1097285b8..c6f9628f39b 100644 --- a/arch/um/include/tlb.h +++ b/arch/um/include/tlb.h @@ -37,31 +37,25 @@ struct host_vm_op { extern void mprotect_kernel_vm(int w); extern void force_flush_all(void); extern void fix_range_common(struct mm_struct *mm, unsigned long start_addr, - unsigned long end_addr, int force, int data, - void (*do_ops)(int, struct host_vm_op *, int)); + unsigned long end_addr, int force, + void (*do_ops)(union mm_context *, + struct host_vm_op *, int)); extern int flush_tlb_kernel_range_common(unsigned long start, unsigned long end); extern int add_mmap(unsigned long virt, unsigned long phys, unsigned long len, int r, int w, int x, struct host_vm_op *ops, int index, - int last_filled, int data, - void (*do_ops)(int, struct host_vm_op *, int)); + int last_filled, union mm_context *mmu, + void (*do_ops)(union mm_context *, struct host_vm_op *, + int)); extern int add_munmap(unsigned long addr, unsigned long len, struct host_vm_op *ops, int index, int last_filled, - int data, void (*do_ops)(int, struct host_vm_op *, int)); + union mm_context *mmu, + void (*do_ops)(union mm_context *, struct host_vm_op *, + int)); extern int add_mprotect(unsigned long addr, unsigned long len, int r, int w, int x, struct host_vm_op *ops, int index, - int last_filled, int data, - void (*do_ops)(int, struct host_vm_op *, int)); + int last_filled, union mm_context *mmu, + void (*do_ops)(union mm_context *, struct host_vm_op *, + int)); #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/kernel/dyn.lds.S b/arch/um/kernel/dyn.lds.S index 715b0838a68..3942a5f245d 100644 --- a/arch/um/kernel/dyn.lds.S +++ b/arch/um/kernel/dyn.lds.S @@ -67,6 +67,12 @@ SECTIONS *(.stub .text.* .gnu.linkonce.t.*) /* .gnu.warning sections are handled specially by elf32.em. */ *(.gnu.warning) + + . = ALIGN(4096); + __syscall_stub_start = .; + *(.__syscall_stub*) + __syscall_stub_end = .; + . = ALIGN(4096); } =0x90909090 .fini : { KEEP (*(.fini)) diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c index 420e6d51fa0..a24e3b7f4bf 100644 --- a/arch/um/kernel/physmem.c +++ b/arch/um/kernel/physmem.c @@ -353,6 +353,8 @@ void map_memory(unsigned long virt, unsigned long phys, unsigned long len, #define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT) +extern int __syscall_stub_start, __binary_start; + void setup_physmem(unsigned long start, unsigned long reserve_end, unsigned long len, unsigned long highmem) { @@ -371,6 +373,12 @@ void setup_physmem(unsigned long start, unsigned long reserve_end, exit(1); } + /* Special kludge - This page will be mapped in to userspace processes + * from physmem_fd, so it needs to be written out there. + */ + os_seek_file(physmem_fd, __pa(&__syscall_stub_start)); + os_write_file(physmem_fd, &__syscall_stub_start, PAGE_SIZE); + bootmap_size = init_bootmem(pfn, pfn + delta); free_bootmem(__pa(reserve_end) + bootmap_size, len - bootmap_size - reserve); diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c index 1b5ef3e96c7..c45a60e9c92 100644 --- a/arch/um/kernel/process.c +++ b/arch/um/kernel/process.c @@ -32,6 +32,7 @@ #include "uml-config.h" #include "choose-mode.h" #include "mode.h" +#include "tempfile.h" #ifdef UML_CONFIG_MODE_SKAS #include "skas.h" #include "skas_ptrace.h" @@ -358,11 +359,16 @@ void forward_pending_sigio(int target) kill(target, SIGIO); } +int ptrace_faultinfo = 0; +int proc_mm = 1; + +extern void *__syscall_stub_start, __syscall_stub_end; + #ifdef UML_CONFIG_MODE_SKAS -static inline int check_skas3_ptrace_support(void) +static inline void check_skas3_ptrace_support(void) { struct ptrace_faultinfo fi; - int pid, n, ret = 1; + int pid, n; printf("Checking for the skas3 patch in the host..."); pid = start_ptraced_child(); @@ -374,33 +380,31 @@ static inline int check_skas3_ptrace_support(void) else { perror("not found"); } - ret = 0; - } else { + } + else { + ptrace_faultinfo = 1; printf("found\n"); } init_registers(pid); stop_ptraced_child(pid, 1, 1); - - return(ret); } int can_do_skas(void) { - int ret = 1; - printf("Checking for /proc/mm..."); if (os_access("/proc/mm", OS_ACC_W_OK) < 0) { + proc_mm = 0; printf("not found\n"); - ret = 0; goto out; - } else { + } + else { printf("found\n"); } - ret = check_skas3_ptrace_support(); out: - return ret; + check_skas3_ptrace_support(); + return 1; } #else int can_do_skas(void) diff --git a/arch/um/kernel/skas/exec_kern.c b/arch/um/kernel/skas/exec_kern.c index c6b4d5dba78..77ed7bbab21 100644 --- a/arch/um/kernel/skas/exec_kern.c +++ b/arch/um/kernel/skas/exec_kern.c @@ -18,7 +18,7 @@ void flush_thread_skas(void) { force_flush_all(); - switch_mm_skas(current->mm->context.skas.mm_fd); + switch_mm_skas(¤t->mm->context.skas.id); } void start_thread_skas(struct pt_regs *regs, unsigned long eip, diff --git a/arch/um/kernel/skas/include/mm_id.h b/arch/um/kernel/skas/include/mm_id.h new file mode 100644 index 00000000000..48dd0989dda --- /dev/null +++ b/arch/um/kernel/skas/include/mm_id.h @@ -0,0 +1,17 @@ +/* + * Copyright (C) 2005 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#ifndef __MM_ID_H +#define __MM_ID_H + +struct mm_id { + union { + int mm_fd; + int pid; + } u; + unsigned long stack; +}; + +#endif diff --git a/arch/um/kernel/skas/include/mmu-skas.h b/arch/um/kernel/skas/include/mmu-skas.h index 4cd60d7213f..278b72f1d9a 100644 --- a/arch/um/kernel/skas/include/mmu-skas.h +++ b/arch/um/kernel/skas/include/mmu-skas.h @@ -6,10 +6,15 @@ #ifndef __SKAS_MMU_H #define __SKAS_MMU_H +#include "mm_id.h" + struct mmu_context_skas { - int mm_fd; + struct mm_id id; + unsigned long last_page_table; }; +extern void switch_mm_skas(struct mm_id * mm_idp); + #endif /* diff --git a/arch/um/kernel/skas/include/skas.h b/arch/um/kernel/skas/include/skas.h index 96b51dba347..d91a60f3830 100644 --- a/arch/um/kernel/skas/include/skas.h +++ b/arch/um/kernel/skas/include/skas.h @@ -6,9 +6,11 @@ #ifndef __SKAS_H #define __SKAS_H +#include "mm_id.h" #include "sysdep/ptrace.h" extern int userspace_pid[]; +extern int proc_mm, ptrace_faultinfo; extern void switch_threads(void *me, void *next); extern void thread_wait(void *sw, void *fb); @@ -22,16 +24,17 @@ extern void new_thread_proc(void *stack, void (*handler)(int sig)); extern void remove_sigstack(void); extern void new_thread_handler(int sig); extern void handle_syscall(union uml_pt_regs *regs); -extern void map(int fd, unsigned long virt, unsigned long len, int r, int w, - int x, int phys_fd, unsigned long long offset); -extern int unmap(int fd, void *addr, unsigned long len); -extern int protect(int fd, unsigned long addr, unsigned long len, - int r, int w, int x); +extern int map(struct mm_id * mm_idp, unsigned long virt, unsigned long len, + int r, int w, int x, int phys_fd, unsigned long long offset); +extern int unmap(struct mm_id * mm_idp, void *addr, unsigned long len); +extern int protect(struct mm_id * mm_idp, unsigned long addr, + unsigned long len, int r, int w, int x); extern void user_signal(int sig, union uml_pt_regs *regs, int pid); extern int new_mm(int from); -extern void start_userspace(int cpu); +extern int start_userspace(unsigned long stub_stack); extern void get_skas_faultinfo(int pid, struct faultinfo * fi); extern long execute_syscall_skas(void *r); +extern unsigned long current_stub_stack(void); #endif diff --git a/arch/um/kernel/skas/mem.c b/arch/um/kernel/skas/mem.c index 438db2f4345..147466d7ff4 100644 --- a/arch/um/kernel/skas/mem.c +++ b/arch/um/kernel/skas/mem.c @@ -5,7 +5,9 @@ #include "linux/config.h" #include "linux/mm.h" +#include "asm/pgtable.h" #include "mem_user.h" +#include "skas.h" unsigned long set_task_sizes_skas(int arg, unsigned long *host_size_out, unsigned long *task_size_out) @@ -18,7 +20,9 @@ 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; - *task_size_out = top; + if (proc_mm && ptrace_faultinfo) + *task_size_out = top; + else *task_size_out = CONFIG_STUB_START & PGDIR_MASK; #endif return(((unsigned long) set_task_sizes_skas) & ~0xffffff); } diff --git a/arch/um/kernel/skas/mem_user.c b/arch/um/kernel/skas/mem_user.c index 1310bf1e88d..b0980ff3bd9 100644 --- a/arch/um/kernel/skas/mem_user.c +++ b/arch/um/kernel/skas/mem_user.c @@ -3,100 +3,171 @@ * Licensed under the GPL */ +#include <signal.h> #include <errno.h> #include <sys/mman.h> +#include <sys/wait.h> +#include <asm/page.h> +#include <asm/unistd.h> #include "mem_user.h" #include "mem.h" +#include "mm_id.h" #include "user.h" #include "os.h" #include "proc_mm.h" - -void map(int fd, unsigned long virt, unsigned long len, int r, int w, - int x, int phys_fd, unsigned long long offset) +#include "ptrace_user.h" +#include "user_util.h" +#include "kern_util.h" +#include "task.h" +#include "registers.h" +#include "uml-config.h" +#include "sysdep/ptrace.h" +#include "sysdep/stub.h" +#include "skas.h" + +extern unsigned long syscall_stub, __syscall_stub_start; + +extern void wait_stub_done(int pid, int sig, char * fname); + +static long run_syscall_stub(struct mm_id * mm_idp, int syscall, + unsigned long *args) { - struct proc_mm_op map; - int prot, n; - - prot = (r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) | - (x ? PROT_EXEC : 0); - - map = ((struct proc_mm_op) { .op = MM_MMAP, - .u = - { .mmap = - { .addr = virt, - .len = len, - .prot = prot, - .flags = MAP_SHARED | - MAP_FIXED, - .fd = phys_fd, - .offset = offset - } } } ); - n = os_write_file(fd, &map, sizeof(map)); - if(n != sizeof(map)) - printk("map : /proc/mm map failed, err = %d\n", -n); + int n, pid = mm_idp->u.pid; + unsigned long regs[MAX_REG_NR]; + + get_safe_registers(regs); + regs[REGS_IP_INDEX] = UML_CONFIG_STUB_CODE + + ((unsigned long) &syscall_stub - + (unsigned long) &__syscall_stub_start); + /* XXX Don't have a define for starting a syscall */ + regs[REGS_SYSCALL_NR] = syscall; + regs[REGS_SYSCALL_ARG1] = args[0]; + regs[REGS_SYSCALL_ARG2] = args[1]; + regs[REGS_SYSCALL_ARG3] = args[2]; + regs[REGS_SYSCALL_ARG4] = args[3]; + regs[REGS_SYSCALL_ARG5] = args[4]; + regs[REGS_SYSCALL_ARG6] = args[5]; + n = ptrace_setregs(pid, regs); + if(n < 0){ + printk("run_syscall_stub : PTRACE_SETREGS failed, " + "errno = %d\n", n); + return(n); + } + + wait_stub_done(pid, 0, "run_syscall_stub"); + + return(*((unsigned long *) mm_idp->stack)); } -int unmap(int fd, void *addr, unsigned long len) +int map(struct mm_id *mm_idp, unsigned long virt, unsigned long len, + int r, int w, int x, int phys_fd, unsigned long long offset) { - struct proc_mm_op unmap; - int n; - - unmap = ((struct proc_mm_op) { .op = MM_MUNMAP, - .u = - { .munmap = - { .addr = (unsigned long) addr, - .len = len } } } ); - n = os_write_file(fd, &unmap, sizeof(unmap)); - if(n != sizeof(unmap)) { - if(n < 0) - return(n); - else if(n > 0) - return(-EIO); - } - - return(0); + int prot, n; + + prot = (r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) | + (x ? PROT_EXEC : 0); + + if(proc_mm){ + struct proc_mm_op map; + int fd = mm_idp->u.mm_fd; + map = ((struct proc_mm_op) { .op = MM_MMAP, + .u = + { .mmap = + { .addr = virt, + .len = len, + .prot = prot, + .flags = MAP_SHARED | + MAP_FIXED, + .fd = phys_fd, + .offset= offset + } } } ); + n = os_write_file(fd, &map, sizeof(map)); + if(n != sizeof(map)) + printk("map : /proc/mm map failed, err = %d\n", -n); + } + else { + long res; + unsigned long args[] = { virt, len, prot, + MAP_SHARED | MAP_FIXED, ph |