diff options
Diffstat (limited to 'arch/um')
| -rw-r--r-- | arch/um/Kconfig.common | 6 | ||||
| -rw-r--r-- | arch/um/Makefile | 4 | ||||
| -rw-r--r-- | arch/um/include/asm/common.lds.S | 2 | ||||
| -rw-r--r-- | arch/um/include/asm/irqflags.h | 18 | ||||
| -rw-r--r-- | arch/um/kernel/Makefile | 5 | ||||
| -rw-r--r-- | arch/um/kernel/initrd.c | 2 | ||||
| -rw-r--r-- | arch/um/kernel/skas/syscall.c | 13 | ||||
| -rw-r--r-- | arch/um/kernel/um_arch.c | 8 | ||||
| -rw-r--r-- | arch/um/os-Linux/Makefile | 3 | ||||
| -rw-r--r-- | arch/um/os-Linux/signal.c | 5 |
10 files changed, 33 insertions, 33 deletions
diff --git a/arch/um/Kconfig.common b/arch/um/Kconfig.common index cc0013475444..fd443852103c 100644 --- a/arch/um/Kconfig.common +++ b/arch/um/Kconfig.common @@ -1,14 +1,17 @@ config UML bool default y + select ARCH_HAS_KCOV select HAVE_ARCH_AUDITSYSCALL select HAVE_ARCH_SECCOMP_FILTER select HAVE_UID16 select HAVE_FUTEX_CMPXCHG if FUTEX + select HAVE_DEBUG_KMEMLEAK select GENERIC_IRQ_SHOW select GENERIC_CPU_DEVICES select GENERIC_IO select GENERIC_CLOCKEVENTS + select HAVE_GCC_PLUGINS select TTY # Needed for line.c config MMU @@ -30,10 +33,9 @@ config PCI config PCMCIA bool -# Yet to do! config TRACE_IRQFLAGS_SUPPORT bool - default n + default y config LOCKDEP_SUPPORT bool diff --git a/arch/um/Makefile b/arch/um/Makefile index e3abe6f3156d..0ca46ededfc7 100644 --- a/arch/um/Makefile +++ b/arch/um/Makefile @@ -78,8 +78,8 @@ include $(ARCH_DIR)/Makefile-os-$(OS) KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \ -I$(srctree)/$(HOST_DIR)/include/uapi \ - -I$(HOST_DIR)/include/generated \ - -I$(HOST_DIR)/include/generated/uapi + -I$(objtree)/$(HOST_DIR)/include/generated \ + -I$(objtree)/$(HOST_DIR)/include/generated/uapi # -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/include/asm/common.lds.S b/arch/um/include/asm/common.lds.S index 1dd5bd8a8c59..133055311dce 100644 --- a/arch/um/include/asm/common.lds.S +++ b/arch/um/include/asm/common.lds.S @@ -81,7 +81,7 @@ .altinstr_replacement : { *(.altinstr_replacement) } /* .exit.text is discard at runtime, not link time, to deal with references from .altinstructions and .eh_frame */ - .exit.text : { *(.exit.text) } + .exit.text : { EXIT_TEXT } .exit.data : { *(.exit.data) } .preinit_array : { diff --git a/arch/um/include/asm/irqflags.h b/arch/um/include/asm/irqflags.h index c780d8a16773..3bb221e1d5a4 100644 --- a/arch/um/include/asm/irqflags.h +++ b/arch/um/include/asm/irqflags.h @@ -6,37 +6,33 @@ extern int set_signals(int enable); extern void block_signals(void); extern void unblock_signals(void); +#define arch_local_save_flags arch_local_save_flags static inline unsigned long arch_local_save_flags(void) { return get_signals(); } +#define arch_local_irq_restore arch_local_irq_restore static inline void arch_local_irq_restore(unsigned long flags) { set_signals(flags); } +#define arch_local_irq_enable arch_local_irq_enable static inline void arch_local_irq_enable(void) { unblock_signals(); } +#define arch_local_irq_disable arch_local_irq_disable static inline void arch_local_irq_disable(void) { block_signals(); } -static inline unsigned long arch_local_irq_save(void) -{ - unsigned long flags; - flags = arch_local_save_flags(); - arch_local_irq_disable(); - return flags; -} +#define ARCH_IRQ_DISABLED 0 +#define ARCh_IRQ_ENABLED (SIGIO|SIGVTALRM) -static inline bool arch_irqs_disabled(void) -{ - return arch_local_save_flags() == 0; -} +#include <asm-generic/irqflags.h> #endif diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile index a6a5e42caaef..2f36d515762e 100644 --- a/arch/um/kernel/Makefile +++ b/arch/um/kernel/Makefile @@ -3,6 +3,11 @@ # Licensed under the GPL # +# Don't instrument UML-specific code; without this, we may crash when +# accessing the instrumentation buffer for the first time from the +# kernel. +KCOV_INSTRUMENT := n + CPPFLAGS_vmlinux.lds := -DSTART=$(LDS_START) \ -DELF_ARCH=$(LDS_ELF_ARCH) \ -DELF_FORMAT=$(LDS_ELF_FORMAT) \ diff --git a/arch/um/kernel/initrd.c b/arch/um/kernel/initrd.c index 55cead809b18..48bae81f8dca 100644 --- a/arch/um/kernel/initrd.c +++ b/arch/um/kernel/initrd.c @@ -37,8 +37,6 @@ static int __init read_initrd(void) } area = alloc_bootmem(size); - if (area == NULL) - return 0; if (load_initrd(initrd, area, size) == -1) return 0; diff --git a/arch/um/kernel/skas/syscall.c b/arch/um/kernel/skas/syscall.c index 48b0dcbd87be..b783ac87d98a 100644 --- a/arch/um/kernel/skas/syscall.c +++ b/arch/um/kernel/skas/syscall.c @@ -20,19 +20,14 @@ void handle_syscall(struct uml_pt_regs *r) UPT_SYSCALL_NR(r) = PT_SYSCALL_NR(r->gp); PT_REGS_SET_SYSCALL_RETURN(regs, -ENOSYS); - /* Do the secure computing check first; failures should be fast. */ - if (secure_computing() == -1) - return; - if (syscall_trace_enter(regs)) goto out; - /* Update the syscall number after orig_ax has potentially been updated - * with ptrace. - */ - UPT_SYSCALL_NR(r) = PT_SYSCALL_NR(r->gp); - syscall = UPT_SYSCALL_NR(r); + /* Do the seccomp check after ptrace; failures should be fast. */ + if (secure_computing(NULL) == -1) + goto out; + syscall = UPT_SYSCALL_NR(r); if (syscall >= 0 && syscall <= __NR_syscall_max) PT_REGS_SET_SYSCALL_RETURN(regs, EXECUTE_SYSCALL(syscall, regs)); diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c index 16630e75f056..e8175a8aa22c 100644 --- a/arch/um/kernel/um_arch.c +++ b/arch/um/kernel/um_arch.c @@ -319,9 +319,6 @@ int __init linux_main(int argc, char **argv) start_vm = VMALLOC_START; - setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem); - mem_total_pages(physmem_size, iomem_size, highmem); - virtmem_size = physmem_size; stack = (unsigned long) argv; stack &= ~(1024 * 1024 - 1); @@ -334,7 +331,6 @@ int __init linux_main(int argc, char **argv) printf("Kernel virtual memory size shrunk to %lu bytes\n", virtmem_size); - stack_protections((unsigned long) &init_thread_info); os_flush_stdout(); return start_uml(); @@ -342,6 +338,10 @@ int __init linux_main(int argc, char **argv) void __init setup_arch(char **cmdline_p) { + stack_protections((unsigned long) &init_thread_info); + setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem); + mem_total_pages(physmem_size, iomem_size, highmem); + paging_init(); strlcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); *cmdline_p = command_line; diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile index 08ff5094fcdd..ada473bf6f46 100644 --- a/arch/um/os-Linux/Makefile +++ b/arch/um/os-Linux/Makefile @@ -3,6 +3,9 @@ # Licensed under the GPL # +# Don't instrument UML-specific code +KCOV_INSTRUMENT := n + obj-y = aio.o execvp.o file.o helper.o irq.o main.o mem.o process.o \ registers.o sigio.o signal.o start_up.o time.o tty.o \ umid.o user_syms.o util.o drivers/ skas/ diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c index 8acaf4e384c0..a86d7cc2c2d8 100644 --- a/arch/um/os-Linux/signal.c +++ b/arch/um/os-Linux/signal.c @@ -15,6 +15,7 @@ #include <kern_util.h> #include <os.h> #include <sysdep/mcontext.h> +#include <um_malloc.h> void (*sig_info[NSIG])(int, struct siginfo *, struct uml_pt_regs *) = { [SIGTRAP] = relay_signal, @@ -32,7 +33,7 @@ static void sig_handler_common(int sig, struct siginfo *si, mcontext_t *mc) struct uml_pt_regs *r; int save_errno = errno; - r = malloc(sizeof(struct uml_pt_regs)); + r = uml_kmalloc(sizeof(struct uml_pt_regs), UM_GFP_ATOMIC); if (!r) panic("out of memory"); @@ -91,7 +92,7 @@ static void timer_real_alarm_handler(mcontext_t *mc) { struct uml_pt_regs *regs; - regs = malloc(sizeof(struct uml_pt_regs)); + regs = uml_kmalloc(sizeof(struct uml_pt_regs), UM_GFP_ATOMIC); if (!regs) panic("out of memory"); |
