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* [glibc] generic/typesizes.h: Add support for 32-bit arches with 64-bit types
@ 2020-04-29 16:57 Alistair Francis
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From: Alistair Francis @ 2020-04-29 16:57 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=07fe93cd9850696f3f13a8fd0d0f7c37e3fe7f37
commit 07fe93cd9850696f3f13a8fd0d0f7c37e3fe7f37
Author: Alistair Francis <alistair.francis@wdc.com>
Date: Fri Feb 14 11:02:29 2020 -0800
generic/typesizes.h: Add support for 32-bit arches with 64-bit types
Update the default typesizes.h to match the new kernel sizes for 32-bit
architectures with a 64-bit time_t and friends. This follows the sizes
used for RV32 which is a y2038 safe architecture added after Linux 5.1.
Reviewed-by: Vineet Gupta <vgupta@synopsys.com>
Tested-by: Vineet Gupta <vgupta@synopsys.com>
Diff:
---
sysdeps/unix/sysv/linux/generic/bits/typesizes.h | 33 +++++++++++++++++-------
1 file changed, 23 insertions(+), 10 deletions(-)
diff --git a/sysdeps/unix/sysv/linux/generic/bits/typesizes.h b/sysdeps/unix/sysv/linux/generic/bits/typesizes.h
index 4fb246ac74..0a66818c54 100644
--- a/sysdeps/unix/sysv/linux/generic/bits/typesizes.h
+++ b/sysdeps/unix/sysv/linux/generic/bits/typesizes.h
@@ -26,31 +26,44 @@
/* See <bits/types.h> for the meaning of these macros. This file exists so
that <bits/types.h> need not vary across different GNU platforms. */
+#if __TIMESIZE == 64 && __WORDSIZE == 32
+/* These are the "new" y2038 types defined for architectures added after
+ the 5.1 kernel. */
+# define __INO_T_TYPE __UQUAD_TYPE
+# define __OFF_T_TYPE __SQUAD_TYPE
+# define __RLIM_T_TYPE __UQUAD_TYPE
+# define __BLKCNT_T_TYPE __SQUAD_TYPE
+# define __FSBLKCNT_T_TYPE __UQUAD_TYPE
+# define __FSFILCNT_T_TYPE __UQUAD_TYPE
+# define __TIME_T_TYPE __SQUAD_TYPE
+# define __SUSECONDS_T_TYPE __SQUAD_TYPE
+#else
+# define __INO_T_TYPE __ULONGWORD_TYPE
+# define __OFF_T_TYPE __SLONGWORD_TYPE
+# define __RLIM_T_TYPE __ULONGWORD_TYPE
+# define __BLKCNT_T_TYPE __SLONGWORD_TYPE
+# define __FSBLKCNT_T_TYPE __ULONGWORD_TYPE
+# define __FSFILCNT_T_TYPE __ULONGWORD_TYPE
+# define __TIME_T_TYPE __SLONGWORD_TYPE
+# define __SUSECONDS_T_TYPE __SLONGWORD_TYPE
+#endif
#define __DEV_T_TYPE __UQUAD_TYPE
#define __UID_T_TYPE __U32_TYPE
#define __GID_T_TYPE __U32_TYPE
-#define __INO_T_TYPE __ULONGWORD_TYPE
#define __INO64_T_TYPE __UQUAD_TYPE
#define __MODE_T_TYPE __U32_TYPE
#define __NLINK_T_TYPE __U32_TYPE
-#define __OFF_T_TYPE __SLONGWORD_TYPE
#define __OFF64_T_TYPE __SQUAD_TYPE
#define __PID_T_TYPE __S32_TYPE
-#define __RLIM_T_TYPE __ULONGWORD_TYPE
#define __RLIM64_T_TYPE __UQUAD_TYPE
-#define __BLKCNT_T_TYPE __SLONGWORD_TYPE
#define __BLKCNT64_T_TYPE __SQUAD_TYPE
-#define __FSBLKCNT_T_TYPE __ULONGWORD_TYPE
#define __FSBLKCNT64_T_TYPE __UQUAD_TYPE
-#define __FSFILCNT_T_TYPE __ULONGWORD_TYPE
#define __FSFILCNT64_T_TYPE __UQUAD_TYPE
#define __FSWORD_T_TYPE __SWORD_TYPE
#define __ID_T_TYPE __U32_TYPE
#define __CLOCK_T_TYPE __SLONGWORD_TYPE
-#define __TIME_T_TYPE __SLONGWORD_TYPE
#define __USECONDS_T_TYPE __U32_TYPE
-#define __SUSECONDS_T_TYPE __SLONGWORD_TYPE
#define __SUSECONDS64_T_TYPE __SQUAD_TYPE
#define __DADDR_T_TYPE __S32_TYPE
#define __KEY_T_TYPE __S32_TYPE
@@ -63,7 +76,7 @@
#define __SYSCALL_ULONG_TYPE __ULONGWORD_TYPE
#define __CPU_MASK_TYPE __ULONGWORD_TYPE
-#ifdef __LP64__
+#if defined __LP64__ || (__TIMESIZE == 64 && __WORDSIZE == 32)
/* Tell the libc code that off_t and off64_t are actually the same type
for all ABI purposes, even if possibly expressed as different base types
for C type-checking purposes. */
@@ -79,7 +92,7 @@
# define __STATFS_MATCHES_STATFS64 1
/* And for getitimer, setitimer and rusage */
-# define __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64 1
+# define __KERNEL_OLD_TIMEVAL_MATCHES_TIMEVAL64 (__WORDSIZE == 64)
#else
# define __RLIM_T_MATCHES_RLIM64_T 0
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2020-04-29 16:57 [glibc] generic/typesizes.h: Add support for 32-bit arches with 64-bit types Alistair Francis
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