summaryrefslogtreecommitdiff
path: root/fs/binfmt_elf_fdpic.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/binfmt_elf_fdpic.c')
-rw-r--r--fs/binfmt_elf_fdpic.c110
1 files changed, 55 insertions, 55 deletions
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index 96a8b13b57d9..7d35f0e1bc76 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -505,8 +505,9 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
char *k_platform, *k_base_platform;
char __user *u_platform, *u_base_platform, *p;
int loop;
- int nr; /* reset for each csp adjustment */
unsigned long flags = 0;
+ int ei_index;
+ elf_addr_t *elf_info;
#ifdef CONFIG_MMU
/* In some cases (e.g. Hyper-Threading), we want to avoid L1 evictions
@@ -591,6 +592,9 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
if (bprm->have_execfd)
nitems++;
+#ifdef ELF_HWCAP2
+ nitems++;
+#endif
csp = sp;
sp -= nitems * 2 * sizeof(unsigned long);
@@ -601,44 +605,24 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
csp -= sp & 15UL;
sp -= sp & 15UL;
- /* put the ELF interpreter info on the stack */
-#define NEW_AUX_ENT(id, val) \
- do { \
- struct { unsigned long _id, _val; } __user *ent, v; \
- \
- ent = (void __user *) csp; \
- v._id = (id); \
- v._val = (val); \
- if (copy_to_user(ent + nr, &v, sizeof(v))) \
- return -EFAULT; \
- nr++; \
+ /* Create the ELF interpreter info */
+ elf_info = (elf_addr_t *)mm->saved_auxv;
+ /* update AT_VECTOR_SIZE_BASE if the number of NEW_AUX_ENT() changes */
+#define NEW_AUX_ENT(id, val) \
+ do { \
+ *elf_info++ = id; \
+ *elf_info++ = val; \
} while (0)
- nr = 0;
- csp -= 2 * sizeof(unsigned long);
- NEW_AUX_ENT(AT_NULL, 0);
- if (k_platform) {
- nr = 0;
- csp -= 2 * sizeof(unsigned long);
- NEW_AUX_ENT(AT_PLATFORM,
- (elf_addr_t) (unsigned long) u_platform);
- }
-
- if (k_base_platform) {
- nr = 0;
- csp -= 2 * sizeof(unsigned long);
- NEW_AUX_ENT(AT_BASE_PLATFORM,
- (elf_addr_t) (unsigned long) u_base_platform);
- }
-
- if (bprm->have_execfd) {
- nr = 0;
- csp -= 2 * sizeof(unsigned long);
- NEW_AUX_ENT(AT_EXECFD, bprm->execfd);
- }
-
- nr = 0;
- csp -= DLINFO_ITEMS * 2 * sizeof(unsigned long);
+#ifdef ARCH_DLINFO
+ /*
+ * ARCH_DLINFO must come first so PPC can do its special alignment of
+ * AUXV.
+ * update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT() in
+ * ARCH_DLINFO changes
+ */
+ ARCH_DLINFO;
+#endif
NEW_AUX_ENT(AT_HWCAP, ELF_HWCAP);
#ifdef ELF_HWCAP2
NEW_AUX_ENT(AT_HWCAP2, ELF_HWCAP2);
@@ -659,17 +643,29 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
NEW_AUX_ENT(AT_EGID, (elf_addr_t) from_kgid_munged(cred->user_ns, cred->egid));
NEW_AUX_ENT(AT_SECURE, bprm->secureexec);
NEW_AUX_ENT(AT_EXECFN, bprm->exec);
+ if (k_platform)
+ 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->have_execfd)
+ NEW_AUX_ENT(AT_EXECFD, bprm->execfd);
+#undef NEW_AUX_ENT
+ /* AT_NULL is zero; clear the rest too */
+ memset(elf_info, 0, (char *)mm->saved_auxv +
+ sizeof(mm->saved_auxv) - (char *)elf_info);
-#ifdef ARCH_DLINFO
- nr = 0;
- csp -= AT_VECTOR_SIZE_ARCH * 2 * sizeof(unsigned long);
+ /* And advance past the AT_NULL entry. */
+ elf_info += 2;
- /* ARCH_DLINFO must come last so platform specific code can enforce
- * special alignment requirements on the AUXV if necessary (eg. PPC).
- */
- ARCH_DLINFO;
-#endif
-#undef NEW_AUX_ENT
+ ei_index = elf_info - (elf_addr_t *)mm->saved_auxv;
+ csp -= ei_index * sizeof(elf_addr_t);
+
+ /* Put the elf_info on the stack in the right place. */
+ if (copy_to_user((void __user *)csp, mm->saved_auxv,
+ ei_index * sizeof(elf_addr_t)))
+ return -EFAULT;
/* allocate room for argv[] and envv[] */
csp -= (bprm->envc + 1) * sizeof(elf_caddr_t);
@@ -899,10 +895,12 @@ static int elf_fdpic_map_file(struct elf_fdpic_params *params,
kdebug("- DYNAMIC[]: %lx", params->dynamic_addr);
seg = loadmap->segs;
for (loop = 0; loop < loadmap->nsegs; loop++, seg++)
- kdebug("- LOAD[%d] : %08x-%08x [va=%x ms=%x]",
+ kdebug("- LOAD[%d] : %08llx-%08llx [va=%llx ms=%llx]",
loop,
- seg->addr, seg->addr + seg->p_memsz - 1,
- seg->p_vaddr, seg->p_memsz);
+ (unsigned long long) seg->addr,
+ (unsigned long long) seg->addr + seg->p_memsz - 1,
+ (unsigned long long) seg->p_vaddr,
+ (unsigned long long) seg->p_memsz);
return 0;
@@ -1081,9 +1079,10 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
maddr = vm_mmap(file, maddr, phdr->p_memsz + disp, prot, flags,
phdr->p_offset - disp);
- kdebug("mmap[%d] <file> sz=%lx pr=%x fl=%x of=%lx --> %08lx",
- loop, phdr->p_memsz + disp, prot, flags,
- phdr->p_offset - disp, maddr);
+ kdebug("mmap[%d] <file> sz=%llx pr=%x fl=%x of=%llx --> %08lx",
+ loop, (unsigned long long) phdr->p_memsz + disp,
+ prot, flags, (unsigned long long) phdr->p_offset - disp,
+ maddr);
if (IS_ERR_VALUE(maddr))
return (int) maddr;
@@ -1145,8 +1144,9 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
#else
if (excess > 0) {
- kdebug("clear[%d] ad=%lx sz=%lx",
- loop, maddr + phdr->p_filesz, excess);
+ kdebug("clear[%d] ad=%llx sz=%lx", loop,
+ (unsigned long long) maddr + phdr->p_filesz,
+ excess);
if (clear_user((void *) maddr + phdr->p_filesz, excess))
return -EFAULT;
}
@@ -1355,7 +1355,7 @@ static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p,
SET_UID(psinfo->pr_uid, from_kuid_munged(cred->user_ns, cred->uid));
SET_GID(psinfo->pr_gid, from_kgid_munged(cred->user_ns, cred->gid));
rcu_read_unlock();
- strncpy(psinfo->pr_fname, p->comm, sizeof(psinfo->pr_fname));
+ get_task_comm(psinfo->pr_fname, p);
return 0;
}
generated by cgit v1.2.3 (git 2.39.0) at 2025-08-29 17:37:15 +0300