In ARM_EABI mode, the pread64 syscall parameters are aligned on
64-bits. This syscall is used in rtld when processing FDPIC
relocations.
* ldso/include/dl-syscall.h (__syscall_pread): Fix definition.
(__dl_pread): Fix syscall invocation.
* ldso/ldso/fdpic/dl-sysdep.h (__DL_PREAD): Handle __NR_pread64.
Signed-off-by: Mickaël Guêné <mickael.gu...@st.com>
Signed-off-by: Christophe Lyon <christophe.l...@st.com>
diff --git a/ldso/include/dl-syscall.h b/ldso/include/dl-syscall.h
index 5ba8c87..9d80c6a 100644
--- a/ldso/include/dl-syscall.h
+++ b/ldso/include/dl-syscall.h
@@ -159,14 +159,25 @@ static __always_inline _syscall4(int, _dl_readlink, int,
id, const char *, path,
#ifdef __NR_pread64
#define __NR___syscall_pread __NR_pread64
+#ifdef __UCLIBC_SYSCALL_ALIGN_64BIT__
+static __always_inline _syscall6(ssize_t, __syscall_pread, int, fd, void *,
buf, size_t, dummy,
+ size_t, count, off_t, offset_hi, off_t, offset_lo)
+
+static __always_inline ssize_t
+_dl_pread(int fd, void *buf, size_t count, off_t offset)
+{
+ return __syscall_pread(fd, buf, count, 0, __LONG_LONG_PAIR((offset >>
32), (offset & 0xffffffff)));
+}
+#else
static __always_inline _syscall5(ssize_t, __syscall_pread, int, fd, void *,
buf,
size_t, count, off_t, offset_hi, off_t, offset_lo)
static __always_inline ssize_t
_dl_pread(int fd, void *buf, size_t count, off_t offset)
{
- return __syscall_pread(fd, buf, count, offset, offset >> 31);
+ return __syscall_pread(fd, buf, count, __LONG_LONG_PAIR(offset >> 31,
offset));
}
+#endif
#elif defined __NR_pread
#define __NR___syscall_pread __NR_pread
static __always_inline _syscall5(ssize_t, __syscall_pread, int, fd, void *,
buf,
diff --git a/ldso/ldso/fdpic/dl-sysdep.h b/ldso/ldso/fdpic/dl-sysdep.h
index 546811a..6ab303b 100644
--- a/ldso/ldso/fdpic/dl-sysdep.h
+++ b/ldso/ldso/fdpic/dl-sysdep.h
@@ -96,7 +96,7 @@ struct funcdesc_ht;
elfinterp.c. */
#define DL_SKIP_BOOTSTRAP_RELOC(SYMTAB, INDEX, STRTAB) 0
-#ifdef __NR_pread
+#if defined(__NR_pread) || defined(__NR_pread64)
#define _DL_PREAD(FD, BUF, SIZE, OFFSET) \
(_dl_pread((FD), (BUF), (SIZE), (OFFSET)))
#endif
--
2.6.3
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