@@ -213,6 +213,7 @@ extern void arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr,
extern void uprobe_handle_trampoline(struct pt_regs *regs);
extern void *arch_uretprobe_trampoline(unsigned long *psize);
extern unsigned long uprobe_get_trampoline_vaddr(void);
+extern void uprobe_copy_from_page(struct page *page, unsigned long vaddr, void *dst, int len);
#else /* !CONFIG_UPROBES */
struct uprobes_state {
};
@@ -249,14 +249,14 @@ bool __weak is_trap_insn(uprobe_opcode_t *insn)
return is_swbp_insn(insn);
}
-static void copy_from_page(struct page *page, unsigned long vaddr, void *dst, int len)
+void uprobe_copy_from_page(struct page *page, unsigned long vaddr, void *dst, int len)
{
void *kaddr = kmap_atomic(page);
memcpy(dst, kaddr + (vaddr & ~PAGE_MASK), len);
kunmap_atomic(kaddr);
}
-static void copy_to_page(struct page *page, unsigned long vaddr, const void *src, int len)
+static void uprobe_copy_to_page(struct page *page, unsigned long vaddr, const void *src, int len)
{
void *kaddr = kmap_atomic(page);
memcpy(kaddr + (vaddr & ~PAGE_MASK), src, len);
@@ -277,7 +277,7 @@ static int verify_opcode(struct page *page, unsigned long vaddr, uprobe_opcode_t
* is a trap variant; uprobes always wins over any other (gdb)
* breakpoint.
*/
- copy_from_page(page, vaddr, &old_opcode, UPROBE_SWBP_INSN_SIZE);
+ uprobe_copy_from_page(page, vaddr, &old_opcode, UPROBE_SWBP_INSN_SIZE);
is_swbp = is_swbp_insn(&old_opcode);
if (is_swbp_insn(new_opcode)) {
@@ -524,7 +524,7 @@ int uprobe_write_opcode(struct arch_uprobe *auprobe, struct mm_struct *mm,
__SetPageUptodate(new_page);
copy_highpage(new_page, old_page);
- copy_to_page(new_page, vaddr, &opcode, UPROBE_SWBP_INSN_SIZE);
+ uprobe_copy_to_page(new_page, vaddr, &opcode, UPROBE_SWBP_INSN_SIZE);
if (!is_register) {
struct page *orig_page;
@@ -1026,7 +1026,7 @@ static int __copy_insn(struct address_space *mapping, struct file *filp,
if (IS_ERR(page))
return PTR_ERR(page);
- copy_from_page(page, offset, insn, nbytes);
+ uprobe_copy_from_page(page, offset, insn, nbytes);
put_page(page);
return 0;
@@ -1367,7 +1367,7 @@ struct uprobe *uprobe_register(struct inode *inode,
return ERR_PTR(-EINVAL);
/*
- * This ensures that copy_from_page(), copy_to_page() and
+ * This ensures that uprobe_copy_from_page(), uprobe_copy_to_page() and
* __update_ref_ctr() can't cross page boundary.
*/
if (!IS_ALIGNED(offset, UPROBE_SWBP_INSN_SIZE))
@@ -1856,7 +1856,7 @@ void __weak arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr,
void *src, unsigned long len)
{
/* Initialize the slot */
- copy_to_page(page, vaddr, src, len);
+ uprobe_copy_to_page(page, vaddr, src, len);
/*
* We probably need flush_icache_user_page() but it needs vma.
@@ -2287,7 +2287,7 @@ static int is_trap_at_addr(struct mm_struct *mm, unsigned long vaddr)
if (result < 0)
return result;
- copy_from_page(page, vaddr, &opcode, UPROBE_SWBP_INSN_SIZE);
+ uprobe_copy_from_page(page, vaddr, &opcode, UPROBE_SWBP_INSN_SIZE);
put_page(page);
out:
/* This needs to return true for any variant of the trap insn */
Making copy_from_page global and adding uprobe prefix. Adding the uprobe prefix to copy_to_page as well for symmetry. Signed-off-by: Jiri Olsa <jolsa@kernel.org> --- include/linux/uprobes.h | 1 + kernel/events/uprobes.c | 16 ++++++++-------- 2 files changed, 9 insertions(+), 8 deletions(-)