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-rw-r--r--arch/um/kernel/Makefile2
-rw-r--r--arch/um/kernel/checksum.c0
-rw-r--r--arch/um/kernel/exec_kern.c1
-rw-r--r--arch/um/kernel/initrd.c (renamed from arch/um/kernel/initrd_kern.c)21
-rw-r--r--arch/um/kernel/initrd_user.c46
-rw-r--r--arch/um/kernel/ksyms.c1
-rw-r--r--arch/um/kernel/main.c40
-rw-r--r--arch/um/kernel/mem.c40
-rw-r--r--arch/um/kernel/process_kern.c36
-rw-r--r--arch/um/kernel/ptrace.c25
-rw-r--r--arch/um/kernel/sysrq.c21
-rw-r--r--arch/um/kernel/trap_kern.c37
-rw-r--r--arch/um/kernel/tt/ksyms.c1
-rw-r--r--arch/um/kernel/tt/process_kern.c8
-rw-r--r--arch/um/kernel/um_arch.c6
-rw-r--r--arch/um/kernel/uml.lds.S2
16 files changed, 102 insertions, 185 deletions
diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
index 9736ca27c5f..a8918e80df9 100644
--- a/arch/um/kernel/Makefile
+++ b/arch/um/kernel/Makefile
@@ -14,7 +14,7 @@ obj-y = config.o exec_kern.o exitcode.o \
tlb.o trap_kern.o trap_user.o uaccess_user.o um_arch.o umid.o \
user_util.o
-obj-$(CONFIG_BLK_DEV_INITRD) += initrd_kern.o initrd_user.o
+obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o
obj-$(CONFIG_GPROF) += gprof_syms.o
obj-$(CONFIG_GCOV) += gmon_syms.o
obj-$(CONFIG_TTY_LOG) += tty_log.o
diff --git a/arch/um/kernel/checksum.c b/arch/um/kernel/checksum.c
deleted file mode 100644
index e69de29bb2d..00000000000
--- a/arch/um/kernel/checksum.c
+++ /dev/null
diff --git a/arch/um/kernel/exec_kern.c b/arch/um/kernel/exec_kern.c
index 49ddabe69be..efd222ffe20 100644
--- a/arch/um/kernel/exec_kern.c
+++ b/arch/um/kernel/exec_kern.c
@@ -16,7 +16,6 @@
#include "kern.h"
#include "irq_user.h"
#include "tlb.h"
-#include "2_5compat.h"
#include "os.h"
#include "time_user.h"
#include "choose-mode.h"
diff --git a/arch/um/kernel/initrd_kern.c b/arch/um/kernel/initrd.c
index fc568af468b..82ecf904b09 100644
--- a/arch/um/kernel/initrd_kern.c
+++ b/arch/um/kernel/initrd.c
@@ -41,12 +41,31 @@ static int __init uml_initrd_setup(char *line, int *add)
return 0;
}
-__uml_setup("initrd=", uml_initrd_setup,
+__uml_setup("initrd=", uml_initrd_setup,
"initrd=<initrd image>\n"
" This is used to boot UML from an initrd image. The argument is the\n"
" name of the file containing the image.\n\n"
);
+int load_initrd(char *filename, void *buf, int size)
+{
+ int fd, n;
+
+ fd = os_open_file(filename, of_read(OPENFLAGS()), 0);
+ if(fd < 0){
+ printk("Opening '%s' failed - err = %d\n", filename, -fd);
+ return(-1);
+ }
+ n = os_read_file(fd, buf, size);
+ if(n != size){
+ printk("Read of %d bytes from '%s' failed, err = %d\n", size,
+ filename, -n);
+ return(-1);
+ }
+
+ os_close_file(fd);
+ return(0);
+}
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
diff --git a/arch/um/kernel/initrd_user.c b/arch/um/kernel/initrd_user.c
deleted file mode 100644
index cb90681e151..00000000000
--- a/arch/um/kernel/initrd_user.c
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <errno.h>
-
-#include "user_util.h"
-#include "kern_util.h"
-#include "user.h"
-#include "initrd.h"
-#include "os.h"
-
-int load_initrd(char *filename, void *buf, int size)
-{
- int fd, n;
-
- fd = os_open_file(filename, of_read(OPENFLAGS()), 0);
- if(fd < 0){
- printk("Opening '%s' failed - err = %d\n", filename, -fd);
- return(-1);
- }
- n = os_read_file(fd, buf, size);
- if(n != size){
- printk("Read of %d bytes from '%s' failed, err = %d\n", size,
- filename, -n);
- return(-1);
- }
-
- os_close_file(fd);
- return(0);
-}
-
-/*
- * 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/ksyms.c b/arch/um/kernel/ksyms.c
index 78d69dc74b2..99439fa15ef 100644
--- a/arch/um/kernel/ksyms.c
+++ b/arch/um/kernel/ksyms.c
@@ -57,6 +57,7 @@ EXPORT_SYMBOL(copy_to_user_tt);
EXPORT_SYMBOL(strncpy_from_user_skas);
EXPORT_SYMBOL(copy_to_user_skas);
EXPORT_SYMBOL(copy_from_user_skas);
+EXPORT_SYMBOL(clear_user_skas);
#endif
EXPORT_SYMBOL(uml_strdup);
diff --git a/arch/um/kernel/main.c b/arch/um/kernel/main.c
index a17c49703f9..e42e6364ca1 100644
--- a/arch/um/kernel/main.c
+++ b/arch/um/kernel/main.c
@@ -71,7 +71,7 @@ static __init void do_uml_initcalls(void)
static void last_ditch_exit(int sig)
{
- CHOOSE_MODE(kmalloc_ok = 0, (void) 0);
+ kmalloc_ok = 0;
signal(SIGINT, SIG_DFL);
signal(SIGTERM, SIG_DFL);
signal(SIGHUP, SIG_DFL);
@@ -87,7 +87,7 @@ int main(int argc, char **argv, char **envp)
{
char **new_argv;
sigset_t mask;
- int ret, i;
+ int ret, i, err;
/* Enable all signals except SIGIO - in some environments, we can
* enter with some signals blocked
@@ -160,27 +160,29 @@ int main(int argc, char **argv, char **envp)
*/
change_sig(SIGPROF, 0);
- /* Reboot */
- if(ret){
- int err;
-
- printf("\n");
+ /* 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();
+ /* 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);
+ /* 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();
+ /* 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){
+ printf("\n");
execvp(new_argv[0], new_argv);
perror("Failed to exec kernel");
ret = 1;
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index f156661781c..c22825f13e4 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -100,12 +100,37 @@ void mem_init(void)
#endif
}
+/*
+ * Create a page table and place a pointer to it in a middle page
+ * directory entry.
+ */
+static void __init one_page_table_init(pmd_t *pmd)
+{
+ if (pmd_none(*pmd)) {
+ pte_t *pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+ set_pmd(pmd, __pmd(_KERNPG_TABLE +
+ (unsigned long) __pa(pte)));
+ if (pte != pte_offset_kernel(pmd, 0))
+ BUG();
+ }
+}
+
+static void __init one_md_table_init(pud_t *pud)
+{
+#ifdef CONFIG_3_LEVEL_PGTABLES
+ pmd_t *pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+ set_pud(pud, __pud(_KERNPG_TABLE + (unsigned long) __pa(pmd_table)));
+ if (pmd_table != pmd_offset(pud, 0))
+ BUG();
+#endif
+}
+
static void __init fixrange_init(unsigned long start, unsigned long end,
pgd_t *pgd_base)
{
pgd_t *pgd;
+ pud_t *pud;
pmd_t *pmd;
- pte_t *pte;
int i, j;
unsigned long vaddr;
@@ -115,15 +140,12 @@ static void __init fixrange_init(unsigned long start, unsigned long end,
pgd = pgd_base + i;
for ( ; (i < PTRS_PER_PGD) && (vaddr < end); pgd++, i++) {
- pmd = (pmd_t *)pgd;
+ pud = pud_offset(pgd, vaddr);
+ if (pud_none(*pud))
+ one_md_table_init(pud);
+ pmd = pmd_offset(pud, vaddr);
for (; (j < PTRS_PER_PMD) && (vaddr != end); pmd++, j++) {
- if (pmd_none(*pmd)) {
- pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
- set_pmd(pmd, __pmd(_KERNPG_TABLE +
- (unsigned long) __pa(pte)));
- if (pte != pte_offset_kernel(pmd, 0))
- BUG();
- }
+ one_page_table_init(pmd);
vaddr += PMD_SIZE;
}
j = 0;
diff --git a/arch/um/kernel/process_kern.c b/arch/um/kernel/process_kern.c
index c1adf7ba3fd..804c6bbdf67 100644
--- a/arch/um/kernel/process_kern.c
+++ b/arch/um/kernel/process_kern.c
@@ -43,7 +43,6 @@
#include "tlb.h"
#include "frame_kern.h"
#include "sigcontext.h"
-#include "2_5compat.h"
#include "os.h"
#include "mode.h"
#include "mode_kern.h"
@@ -55,18 +54,6 @@
*/
struct cpu_task cpu_tasks[NR_CPUS] = { [0 ... NR_CPUS - 1] = { -1, NULL } };
-struct task_struct *get_task(int pid, int require)
-{
- struct task_struct *ret;
-
- read_lock(&tasklist_lock);
- ret = find_task_by_pid(pid);
- read_unlock(&tasklist_lock);
-
- if(require && (ret == NULL)) panic("get_task couldn't find a task\n");
- return(ret);
-}
-
int external_pid(void *t)
{
struct task_struct *task = t ? t : current;
@@ -189,7 +176,6 @@ void default_idle(void)
while(1){
/* endless idle loop with no priority at all */
- SET_PRI(current);
/*
* although we are an idle CPU, we do not want to
@@ -212,11 +198,6 @@ int page_size(void)
return(PAGE_SIZE);
}
-unsigned long page_mask(void)
-{
- return(PAGE_MASK);
-}
-
void *um_virt_to_phys(struct task_struct *task, unsigned long addr,
pte_t *pte_out)
{
@@ -349,11 +330,6 @@ char *uml_strdup(char *string)
return(new);
}
-void *get_init_task(void)
-{
- return(&init_thread_union.thread_info.task);
-}
-
int copy_to_user_proc(void __user *to, void *from, int size)
{
return(copy_to_user(to, from, size));
@@ -480,15 +456,3 @@ unsigned long arch_align_stack(unsigned long sp)
return sp & ~0xf;
}
#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/ptrace.c b/arch/um/kernel/ptrace.c
index 2b75d8d9ba7..71af4d50389 100644
--- a/arch/um/kernel/ptrace.c
+++ b/arch/um/kernel/ptrace.c
@@ -28,9 +28,9 @@ static inline void set_singlestepping(struct task_struct *child, int on)
child->thread.singlestep_syscall = 0;
#ifdef SUBARCH_SET_SINGLESTEPPING
- SUBARCH_SET_SINGLESTEPPING(child, on)
+ SUBARCH_SET_SINGLESTEPPING(child, on);
#endif
- }
+}
/*
* Called by kernel/ptrace.c when detaching..
@@ -83,7 +83,7 @@ long sys_ptrace(long request, long pid, long addr, long data)
}
#ifdef SUBACH_PTRACE_SPECIAL
- SUBARCH_PTRACE_SPECIAL(child,request,addr,data)
+ SUBARCH_PTRACE_SPECIAL(child,request,addr,data);
#endif
ret = ptrace_check_attach(child, request == PTRACE_KILL);
@@ -322,11 +322,9 @@ void syscall_trace(union uml_pt_regs *regs, int entryexit)
UPT_SYSCALL_ARG2(regs),
UPT_SYSCALL_ARG3(regs),
UPT_SYSCALL_ARG4(regs));
- else {
- int res = UPT_SYSCALL_RET(regs);
- audit_syscall_exit(current, AUDITSC_RESULT(res),
- res);
- }
+ else audit_syscall_exit(current,
+ AUDITSC_RESULT(UPT_SYSCALL_RET(regs)),
+ UPT_SYSCALL_RET(regs));
}
/* Fake a debug trap */
@@ -356,14 +354,3 @@ void syscall_trace(union uml_pt_regs *regs, int entryexit)
current->exit_code = 0;
}
}
-
-/*
- * 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/sysrq.c b/arch/um/kernel/sysrq.c
index e630438f9e7..f80850091e7 100644
--- a/arch/um/kernel/sysrq.c
+++ b/arch/um/kernel/sysrq.c
@@ -3,6 +3,7 @@
* Licensed under the GPL
*/
+#include "linux/config.h"
#include "linux/sched.h"
#include "linux/kernel.h"
#include "linux/module.h"
@@ -12,14 +13,14 @@
#include "sysrq.h"
#include "user_util.h"
-void show_trace(unsigned long * stack)
+/* Catch non-i386 SUBARCH's. */
+#if !defined(CONFIG_UML_X86) || defined(CONFIG_64BIT)
+void show_trace(struct task_struct *task, unsigned long * stack)
{
- /* XXX: Copy the CONFIG_FRAME_POINTER stack-walking backtrace from
- * arch/i386/kernel/traps.c, and then move this to sys-i386/sysrq.c.*/
unsigned long addr;
if (!stack) {
- stack = (unsigned long*) &stack;
+ stack = (unsigned long*) &stack;
WARN_ON(1);
}
@@ -35,6 +36,7 @@ void show_trace(unsigned long * stack)
}
printk("\n");
}
+#endif
/*
* stack dumps generator - this is used by arch-independent code.
@@ -44,7 +46,7 @@ void dump_stack(void)
{
unsigned long stack;
- show_trace(&stack);
+ show_trace(current, &stack);
}
EXPORT_SYMBOL(dump_stack);
@@ -59,7 +61,11 @@ void show_stack(struct task_struct *task, unsigned long *esp)
int i;
if (esp == NULL) {
- if (task != current) {
+ if (task != current && task != NULL) {
+ /* XXX: Isn't this bogus? I.e. isn't this the
+ * *userspace* stack of this task? If not so, use this
+ * even when task == current (as in i386).
+ */
esp = (unsigned long *) KSTK_ESP(task);
/* Which one? No actual difference - just coding style.*/
//esp = (unsigned long *) PT_REGS_IP(&task->thread.regs);
@@ -77,5 +83,6 @@ void show_stack(struct task_struct *task, unsigned long *esp)
printk("%08lx ", *stack++);
}
- show_trace(esp);
+ printk("Call Trace: \n");
+ show_trace(current, esp);
}
diff --git a/arch/um/kernel/trap_kern.c b/arch/um/kernel/trap_kern.c
index 5fca2c61eb9..c20aef12059 100644
--- a/arch/um/kernel/trap_kern.c
+++ b/arch/um/kernel/trap_kern.c
@@ -23,7 +23,6 @@
#include "kern.h"
#include "chan_kern.h"
#include "mconsole_kern.h"
-#include "2_5compat.h"
#include "mem.h"
#include "mem_kern.h"
@@ -57,10 +56,11 @@ int handle_page_fault(unsigned long address, unsigned long ip,
*code_out = SEGV_ACCERR;
if(is_write && !(vma->vm_flags & VM_WRITE))
goto out;
+
+ if(!(vma->vm_flags & (VM_READ | VM_EXEC)))
+ goto out;
+
page = address & PAGE_MASK;
- pgd = pgd_offset(mm, page);
- pud = pud_offset(pgd, page);
- pmd = pmd_offset(pud, page);
do {
survive:
switch (handle_mm_fault(mm, vma, address, is_write)){
@@ -106,33 +106,6 @@ out_of_memory:
goto out;
}
-LIST_HEAD(physmem_remappers);
-
-void register_remapper(struct remapper *info)
-{
- list_add(&info->list, &physmem_remappers);
-}
-
-static int check_remapped_addr(unsigned long address, int is_write)
-{
- struct remapper *remapper;
- struct list_head *ele;
- __u64 offset;
- int fd;
-
- fd = phys_mapping(__pa(address), &offset);
- if(fd == -1)
- return(0);
-
- list_for_each(ele, &physmem_remappers){
- remapper = list_entry(ele, struct remapper, list);
- if((*remapper->proc)(fd, address, is_write, offset))
- return(1);
- }
-
- return(0);
-}
-
/*
* We give a *copy* of the faultinfo in the regs to segv.
* This must be done, since nesting SEGVs could overwrite
@@ -151,8 +124,6 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user, void *sc)
flush_tlb_kernel_vm();
return(0);
}
- else if(check_remapped_addr(address & PAGE_MASK, is_write))
- return(0);
else if(current->mm == NULL)
panic("Segfault with no mm");
err = handle_page_fault(address, ip, is_write, is_user, &si.si_code);
diff --git a/arch/um/kernel/tt/ksyms.c b/arch/um/kernel/tt/ksyms.c
index 92ec85d67c7..84a9385a8fe 100644
--- a/arch/um/kernel/tt/ksyms.c
+++ b/arch/um/kernel/tt/ksyms.c
@@ -12,6 +12,7 @@ EXPORT_SYMBOL(__do_copy_to_user);
EXPORT_SYMBOL(__do_strncpy_from_user);
EXPORT_SYMBOL(__do_strnlen_user);
EXPORT_SYMBOL(__do_clear_user);
+EXPORT_SYMBOL(clear_user_tt);
EXPORT_SYMBOL(tracing_pid);
EXPORT_SYMBOL(honeypot);
diff --git a/arch/um/kernel/tt/process_kern.c b/arch/um/kernel/tt/process_kern.c
index df810ca8fc1..776310fd5b8 100644
--- a/arch/um/kernel/tt/process_kern.c
+++ b/arch/um/kernel/tt/process_kern.c
@@ -32,10 +32,6 @@ void *switch_to_tt(void *prev, void *next, void *last)
unsigned long flags;
int err, vtalrm, alrm, prof, cpu;
char c;
- /* jailing and SMP are incompatible, so this doesn't need to be
- * made per-cpu
- */
- static int reading;
from = prev;
to = next;
@@ -59,13 +55,11 @@ void *switch_to_tt(void *prev, void *next, void *last)
c = 0;
set_current(to);
- reading = 0;
err = os_write_file(to->thread.mode.tt.switch_pipe[1], &c, sizeof(c));
if(err != sizeof(c))
panic("write of switch_pipe failed, err = %d", -err);
- reading = 1;
- if(from->thread.mode.tt.switch_pipe[0] == -1)
+ if(from->thread.mode.tt.switch_pipe[0] == -1)
os_kill_process(os_getpid(), 0);
err = os_read_file(from->thread.mode.tt.switch_pipe[0], &c, sizeof(c));
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 4d10ec372a6..418427107b2 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -111,12 +111,6 @@ struct seq_operations cpuinfo_op = {
.show = show_cpuinfo,
};
-pte_t * __bad_pagetable(void)
-{
- panic("Someone should implement __bad_pagetable");
- return(NULL);
-}
-
/* Set in linux_main */
unsigned long host_task_size;
unsigned long task_size;
diff --git a/arch/um/kernel/uml.lds.S b/arch/um/kernel/uml.lds.S
index 76eadb30918..dd5355500bd 100644
--- a/arch/um/kernel/uml.lds.S
+++ b/arch/um/kernel/uml.lds.S
@@ -73,6 +73,8 @@ SECTIONS
.got : { *(.got.plt) *(.got) }
.dynamic : { *(.dynamic) }
+ .tdata : { *(.tdata .tdata.* .gnu.linkonce.td.*) }
+ .tbss : { *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) }
/* We want the small data sections together, so single-instruction offsets
can access them all, and initialized data all before uninitialized, so
we can shorten the on-disk segment size. */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 21:10:09 +0000