tracehook: exec

[linux-2.6-omap-h63xx.git] / fs / binfmt_elf.c

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 639d2d8b57106ac6e524c4ab7c940ea2fad895da..655ed8d30a86ef7e963414a9cb56d6ed7dc5d3c4 100644 (file)
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -131,6 +131,15 @@ static int padzero(unsigned long elf_bss)
 #define STACK_ALLOC(sp, len) ({ sp -= len ; sp; })
 #endif
 
+#ifndef ELF_BASE_PLATFORM
+/*
+ * AT_BASE_PLATFORM indicates the "real" hardware/microarchitecture.
+ * If the arch defines ELF_BASE_PLATFORM (in asm/elf.h), the value
+ * will be copied to the user stack in the same manner as AT_PLATFORM.
+ */
+#define ELF_BASE_PLATFORM NULL
+#endif
+
 static int
 create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
                unsigned long load_addr, unsigned long interp_load_addr)
@@ -142,7 +151,9 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
        elf_addr_t __user *envp;
        elf_addr_t __user *sp;
        elf_addr_t __user *u_platform;
+       elf_addr_t __user *u_base_platform;
        const char *k_platform = ELF_PLATFORM;
+       const char *k_base_platform = ELF_BASE_PLATFORM;
        int items;
        elf_addr_t *elf_info;
        int ei_index = 0;
@@ -172,6 +183,19 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
                        return -EFAULT;
        }
 
+       /*
+        * If this architecture has a "base" platform capability
+        * string, copy it to userspace.
+        */
+       u_base_platform = NULL;
+       if (k_base_platform) {
+               size_t len = strlen(k_base_platform) + 1;
+
+               u_base_platform = (elf_addr_t __user *)STACK_ALLOC(p, len);
+               if (__copy_to_user(u_base_platform, k_base_platform, len))
+                       return -EFAULT;
+       }
+
        /* Create the ELF interpreter info */
        elf_info = (elf_addr_t *)current->mm->saved_auxv;
        /* update AT_VECTOR_SIZE_BASE if the number of NEW_AUX_ENT() changes */
@@ -209,6 +233,10 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
                NEW_AUX_ENT(AT_PLATFORM,
                            (elf_addr_t)(unsigned long)u_platform);
        }
+       if (k_base_platform) {
+               NEW_AUX_ENT(AT_BASE_PLATFORM,
+                           (elf_addr_t)(unsigned long)u_base_platform);
+       }
        if (bprm->interp_flags & BINPRM_FLAGS_EXECFD) {
                NEW_AUX_ENT(AT_EXECFD, bprm->interp_data);
        }
@@ -975,12 +1003,6 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
 #endif
 
        start_thread(regs, elf_entry, bprm->p);
-       if (unlikely(current->ptrace & PT_PTRACED)) {
-               if (current->ptrace & PT_TRACE_EXEC)
-                       ptrace_notify ((PTRACE_EVENT_EXEC << 8) | SIGTRAP);
-               else
-                       send_sig(SIGTRAP, current, 0);
-       }
        retval = 0;
 out:
        kfree(loc);
@@ -1478,7 +1500,7 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
        const struct user_regset_view *view = task_user_regset_view(dump_task);
        struct elf_thread_core_info *t;
        struct elf_prpsinfo *psinfo;
-       struct task_struct *g, *p;
+       struct core_thread *ct;
        unsigned int i;
 
        info->size = 0;
@@ -1517,31 +1539,26 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
        /*
         * Allocate a structure for each thread.
         */
-       rcu_read_lock();
-       do_each_thread(g, p)
-               if (p->mm == dump_task->mm) {
-                       t = kzalloc(offsetof(struct elf_thread_core_info,
-                                            notes[info->thread_notes]),
-                                   GFP_ATOMIC);
-                       if (unlikely(!t)) {
-                               rcu_read_unlock();
-                               return 0;
-                       }
-                       t->task = p;
-                       if (p == dump_task || !info->thread) {
-                               t->next = info->thread;
-                               info->thread = t;
-                       } else {
-                               /*
-                                * Make sure to keep the original task at
-                                * the head of the list.
-                                */
-                               t->next = info->thread->next;
-                               info->thread->next = t;
-                       }
+       for (ct = &dump_task->mm->core_state->dumper; ct; ct = ct->next) {
+               t = kzalloc(offsetof(struct elf_thread_core_info,
+                                    notes[info->thread_notes]),
+                           GFP_KERNEL);
+               if (unlikely(!t))
+                       return 0;
+
+               t->task = ct->task;
+               if (ct->task == dump_task || !info->thread) {
+                       t->next = info->thread;
+                       info->thread = t;
+               } else {
+                       /*
+                        * Make sure to keep the original task at
+                        * the head of the list.
+                        */
+                       t->next = info->thread->next;
+                       info->thread->next = t;
                }
-       while_each_thread(g, p);
-       rcu_read_unlock();
+       }
 
        /*
         * Now fill in each thread's information.
@@ -1688,7 +1705,6 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
 {
 #define        NUM_NOTES       6
        struct list_head *t;
-       struct task_struct *g, *p;
 
        info->notes = NULL;
        info->prstatus = NULL;
@@ -1720,20 +1736,19 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
 
        info->thread_status_size = 0;
        if (signr) {
+               struct core_thread *ct;
                struct elf_thread_status *ets;
-               rcu_read_lock();
-               do_each_thread(g, p)
-                       if (current->mm == p->mm && current != p) {
-                               ets = kzalloc(sizeof(*ets), GFP_ATOMIC);
-                               if (!ets) {
-                                       rcu_read_unlock();
-                                       return 0;
-                               }
-                               ets->thread = p;
-                               list_add(&ets->list, &info->thread_list);
-                       }
-               while_each_thread(g, p);
-               rcu_read_unlock();
+
+               for (ct = current->mm->core_state->dumper.next;
+                                               ct; ct = ct->next) {
+                       ets = kzalloc(sizeof(*ets), GFP_KERNEL);
+                       if (!ets)
+                               return 0;
+
+                       ets->thread = ct->task;
+                       list_add(&ets->list, &info->thread_list);
+               }
+
                list_for_each(t, &info->thread_list) {
                        int sz;