Index: chromium-120.0.6099.71/third_party/lss/linux_syscall_support.h
===================================================================
--- chromium-120.0.6099.71.orig/third_party/lss/linux_syscall_support.h
+++ chromium-120.0.6099.71/third_party/lss/linux_syscall_support.h
@@ -87,7 +87,7 @@
  * Porting to other related platforms should not be difficult.
  */
 #if (defined(__i386__) || defined(__x86_64__) || defined(__ARM_ARCH_3__) ||   \
-     defined(__mips__) || defined(__PPC__) || defined(__ARM_EABI__) || \
+     defined(__mips__) || defined(__PPC__) || defined(__powerpc64__) || defined(__ARM_EABI__) || \
      defined(__aarch64__) || defined(__s390__) || defined(__e2k__) ||  \
      (defined(__riscv) && __riscv_xlen == 64) || defined(__loongarch_lp64))  \
   && (defined(__linux) || defined(__ANDROID__))
@@ -399,7 +399,7 @@ struct kernel_stat64 {
   unsigned           __pad2;
   unsigned long long st_blocks;
 };
-#elif defined __PPC__
+#elif defined __PPC__ && !defined(__powerpc64__)
 struct kernel_stat64 {
   unsigned long long st_dev;
   unsigned long long st_ino;
@@ -421,6 +421,28 @@ struct kernel_stat64 {
   unsigned long      __unused4;
   unsigned long      __unused5;
 };
+#elif defined(__powerpc64__)
+struct kernel_stat64 {
+  unsigned long int  st_dev;
+  unsigned long int  st_ino;
+  unsigned int       st_mode;
+  unsigned long int  st_nlink;
+  unsigned int       st_uid;
+  unsigned int       st_gid;
+  unsigned long int  st_rdev;
+  unsigned short int __pad2;
+  long int           st_size;
+  long int           st_blksize;
+  long int           st_blocks;
+  long int           st_atime_;
+  unsigned long int  st_atime_nsec_;
+  long int           st_mtime_;
+  unsigned long int  st_mtime_nsec_;
+  long int           st_ctime_;
+  unsigned long int  st_ctime_nsec_;
+  unsigned long int  __unused4;
+  unsigned long int  __unused5;
+};
 #elif defined(__e2k__)
 struct kernel_stat64 {
   unsigned long long st_dev;
@@ -537,7 +559,7 @@ struct kernel_stat {
   uint64_t           st_ctime_nsec_;
   int64_t            __unused4[3];
 };
-#elif defined(__PPC__)
+#elif defined(__PPC__) && !defined(__powerpc64__)
 typedef unsigned long kernel_blkcnt_t;
 typedef unsigned long kernel_blksize_t;
 typedef unsigned kernel_dev_t;
@@ -568,6 +590,37 @@ struct kernel_stat {
   unsigned long      __unused4;
   unsigned long      __unused5;
 };
+#elif defined(__powerpc64__)
+typedef long int kernel_blkcnt_t;
+typedef long int kernel_blksize_t;
+typedef unsigned long int kernel_dev_t;
+typedef unsigned int kernel_gid_t;
+typedef unsigned long int kernel_ino_t;
+typedef unsigned int kernel_mode_t;
+typedef unsigned long int kernel_nlink_t;
+typedef long int kernel_off_t;
+typedef long int kernel_time_t;
+typedef unsigned int kernel_uid_t;
+struct kernel_stat {
+  kernel_dev_t       st_dev;
+  kernel_ino_t       st_ino;
+  kernel_mode_t      st_mode;
+  kernel_nlink_t     st_nlink;
+  kernel_uid_t       st_uid;
+  kernel_gid_t       st_gid;
+  kernel_dev_t       st_rdev;
+  kernel_off_t       st_size;
+  kernel_blksize_t   st_blksize;
+  kernel_blkcnt_t    st_blocks;
+  kernel_time_t      st_atime_;
+  unsigned long int  st_atime_nsec_;
+  kernel_time_t      st_mtime_;
+  unsigned long int  st_mtime_nsec_;
+  kernel_time_t      st_ctime_;
+  unsigned long int  st_ctime_nsec_;
+  unsigned long int  __unused4;
+  unsigned long int  __unused5;
+};
 #elif (defined(__mips__) && _MIPS_SIM != _MIPS_SIM_ABI64)
 typedef int kernel_blkcnt_t;
 typedef int kernel_blksize_t;
@@ -1824,6 +1877,28 @@ struct kernel_statx {
 #ifndef __NR_getcpu
 #define __NR_getcpu             302
 #endif
+
+/* Linux commit 86250b9d12caa1a3dee12a7cf638b7dd70eaadb6 (2010) adds
+ * direct socket system calls to PPC */
+#ifndef __NR_socket
+#define __NR_socket             326
+#endif
+#ifndef __NR_socketpair
+#define __NR_socketpair         333
+#endif
+#ifndef __NR_sendto
+#define __NR_sendto             335
+#endif
+#ifndef __NR_shutdown
+#define __NR_shutdown           338
+#endif
+#ifndef __NR_sendmsg
+#define __NR_sendmsg            341
+#endif
+#ifndef __NR_recvmsg
+#define __NR_recvmsg            342
+#endif
+
 /* End of powerpc defininitions                                              */
 #elif defined(__s390__)
 #ifndef __NR_quotactl
@@ -3363,6 +3438,11 @@ struct kernel_statx {
     /* TODO(csilvers): consider wrapping some args up in a struct, like we
      * do for i386's _syscall6, so we can compile successfully on gcc 2.95
      */
+    #ifdef __powerpc64__
+    /* TODO: implement clone() for ppc64.
+     * until then, use system libc */
+    #define sys_clone clone
+    #else
     LSS_INLINE int LSS_NAME(clone)(int (*fn)(void *), void *child_stack,
                                    int flags, void *arg, int *parent_tidptr,
                                    void *newtls, int *child_tidptr) {
@@ -3433,6 +3513,7 @@ struct kernel_statx {
       }
       LSS_RETURN(int, __ret, __err);
     }
+    #endif
   #elif defined(__s390__)
     #undef  LSS_REG
     #define LSS_REG(r, a) register unsigned long __r##r __asm__("r"#r) = (unsigned long) a
@@ -4783,7 +4864,7 @@ struct kernel_statx {
     LSS_INLINE _syscall6(void*, mmap, void*, addr, size_t, length, int, prot,
                          int, flags, int, fd, int64_t, offset)
   #endif
-  #if defined(__PPC__)
+  #if defined(__PPC__) && !defined(__powerpc64__)
     #undef LSS_SC_LOADARGS_0
     #define LSS_SC_LOADARGS_0(dummy...)
     #undef LSS_SC_LOADARGS_1
@@ -5173,7 +5254,11 @@ struct kernel_statx {
 #endif
 
 #if !defined(__NR_pipe)
+#if defined(__powerpc64__)
+  LSS_INLINE pid_t LSS_NAME(pipe)(int *pipefd) {
+#else
   LSS_INLINE int LSS_NAME(pipe)(int *pipefd) {
+#endif
     return LSS_NAME(pipe2)(pipefd, 0);
   }
 #endif