From 1972341ab1369233c55bd10762117b405e1fbfa9 Mon Sep 17 00:00:00 2001
From: Faraz Shahbazker <faraz.shahbazker@mediatek.com>
Date: Thu, 8 Aug 2024 15:22:40 +0800
Subject: [PATCH] [Y2K38] Support 64-bit time_t as a multilib in headers and
 libraries

The header definition of time_t changes depending on whether
__nanomips_64bit_time_t__ is defined. The compiler is expected
to define this macro when compiling for 64-bit time_t.

Change-Id: I8358cd9666071fac46b6e396b14ec9bd7d3d9eb7
---
 libgloss/mips/uhi/uhi_fstat.c    | 17 +++++++++++++++--
 libgloss/mips/uhi/yamon_fstat.c  | 19 ++++++++++++++++---
 newlib/libc/include/sys/config.h |  3 +++
 3 files changed, 34 insertions(+), 5 deletions(-)

diff --git a/libgloss/mips/uhi/uhi_fstat.c b/libgloss/mips/uhi/uhi_fstat.c
index d097af78c2..56dbb3da0b 100644
--- a/libgloss/mips/uhi/uhi_fstat.c
+++ b/libgloss/mips/uhi/uhi_fstat.c
@@ -97,7 +97,6 @@ fstat (int file, struct stat *sbuf)
   __check (__LINE__, offsetof (struct stat, st_blocks) == 80);
   __check (__LINE__, offsetof (struct stat, st_spare4) == 88);
 #else
-  __check (__LINE__, sizeof (struct stat) == 60);
   __check (__LINE__, offsetof (struct stat, st_dev) == 0);
   __check (__LINE__, offsetof (struct stat, st_ino) == 2);
   __check (__LINE__, offsetof (struct stat, st_mode) == 4);
@@ -105,7 +104,8 @@ fstat (int file, struct stat *sbuf)
   __check (__LINE__, offsetof (struct stat, st_uid) == 10);
   __check (__LINE__, offsetof (struct stat, st_gid) == 12);
   __check (__LINE__, offsetof (struct stat, st_rdev) == 14);
-  __check (__LINE__, offsetof (struct stat, st_size) == 16);
+#ifdef _USE_LONG_TIME_T
+  __check (__LINE__, sizeof (struct stat) == 60);
   __check (__LINE__, offsetof (struct stat, st_atim) == 20);
   //  __check (__LINE__, offsetof (struct stat, st_spare1) == 24);
   __check (__LINE__, offsetof (struct stat, st_mtim) == 28);
@@ -115,6 +115,19 @@ fstat (int file, struct stat *sbuf)
   __check (__LINE__, offsetof (struct stat, st_blksize) == 44);
   __check (__LINE__, offsetof (struct stat, st_blocks) == 48);
   __check (__LINE__, offsetof (struct stat, st_spare4) == 52);
+#else // Using 64-bit time_t
+  __check (__LINE__, sizeof (struct stat) == 88);
+  __check (__LINE__, offsetof (struct stat, st_size) == 16);
+  __check (__LINE__, offsetof (struct stat, st_atim) == 24);
+  //  __check (__LINE__, offsetof (struct stat, st_spare1) == 32);
+  __check (__LINE__, offsetof (struct stat, st_mtim) == 40);
+  //__check (__LINE__, offsetof (struct stat, st_spare2) == 48);
+  __check (__LINE__, offsetof (struct stat, st_ctim) == 56);
+  //__check (__LINE__, offsetof (struct stat, st_spare3) == 64);
+  __check (__LINE__, offsetof (struct stat, st_blksize) == 72);
+  __check (__LINE__, offsetof (struct stat, st_blocks) == 76);
+  __check (__LINE__, offsetof (struct stat, st_spare4) == 80);
+#endif
 #endif
 
   __asm__ __volatile__ (" # %0,%1 = fstat(%2, %3) op=%4\n"
diff --git a/libgloss/mips/uhi/yamon_fstat.c b/libgloss/mips/uhi/yamon_fstat.c
index e107248652..742f080919 100644
--- a/libgloss/mips/uhi/yamon_fstat.c
+++ b/libgloss/mips/uhi/yamon_fstat.c
@@ -98,7 +98,6 @@ fstat (int file, struct stat *sbuf)
   __check (__LINE__, offsetof (struct stat, st_blocks) == 80);
   __check (__LINE__, offsetof (struct stat, st_spare4) == 88);
 #else
-  __check (__LINE__, sizeof (struct stat) == 60);
   __check (__LINE__, offsetof (struct stat, st_dev) == 0);
   __check (__LINE__, offsetof (struct stat, st_ino) == 2);
   __check (__LINE__, offsetof (struct stat, st_mode) == 4);
@@ -106,9 +105,10 @@ fstat (int file, struct stat *sbuf)
   __check (__LINE__, offsetof (struct stat, st_uid) == 10);
   __check (__LINE__, offsetof (struct stat, st_gid) == 12);
   __check (__LINE__, offsetof (struct stat, st_rdev) == 14);
-  __check (__LINE__, offsetof (struct stat, st_size) == 16);
+#ifdef _USE_LONG_TIME_T
+  __check (__LINE__, sizeof (struct stat) == 60);
   __check (__LINE__, offsetof (struct stat, st_atim) == 20);
-  //__check (__LINE__, offsetof (struct stat, st_spare1) == 24);
+  //  __check (__LINE__, offsetof (struct stat, st_spare1) == 24);
   __check (__LINE__, offsetof (struct stat, st_mtim) == 28);
   //__check (__LINE__, offsetof (struct stat, st_spare2) == 32);
   __check (__LINE__, offsetof (struct stat, st_ctim) == 36);
@@ -116,6 +116,19 @@ fstat (int file, struct stat *sbuf)
   __check (__LINE__, offsetof (struct stat, st_blksize) == 44);
   __check (__LINE__, offsetof (struct stat, st_blocks) == 48);
   __check (__LINE__, offsetof (struct stat, st_spare4) == 52);
+#else // Using 64-bit time_t
+  __check (__LINE__, sizeof (struct stat) == 88);
+  __check (__LINE__, offsetof (struct stat, st_size) == 16);
+  __check (__LINE__, offsetof (struct stat, st_atim) == 24);
+  //  __check (__LINE__, offsetof (struct stat, st_spare1) == 32);
+  __check (__LINE__, offsetof (struct stat, st_mtim) == 40);
+  //__check (__LINE__, offsetof (struct stat, st_spare2) == 48);
+  __check (__LINE__, offsetof (struct stat, st_ctim) == 56);
+  //__check (__LINE__, offsetof (struct stat, st_spare3) == 64);
+  __check (__LINE__, offsetof (struct stat, st_blksize) == 72);
+  __check (__LINE__, offsetof (struct stat, st_blocks) == 76);
+  __check (__LINE__, offsetof (struct stat, st_spare4) == 80);
+#endif
 #endif
 
   if (file == 0 || file == 1 || file == 2)
diff --git a/newlib/libc/include/sys/config.h b/newlib/libc/include/sys/config.h
index c4355f6c13..501a5c93a8 100644
--- a/newlib/libc/include/sys/config.h
+++ b/newlib/libc/include/sys/config.h
@@ -290,6 +290,9 @@
 #endif
 #endif
 
+#if defined(__nanomips_64bit_time_t__)
+#undef _WANT_USE_LONG_TIME_T
+#endif
 #ifdef _WANT_USE_LONG_TIME_T
 #ifndef _USE_LONG_TIME_T
 #define _USE_LONG_TIME_T