Merge remote-tracking branch 'remotes/xtensa/tags/20180316-xtensa' into staging

target/xtensa linux-user support.

- small cleanup for xtensa registers dumping (-d cpu);
- add support for debugging linux-user process with xtensa-linux-gdb
  (as opposed to xtensa-elf-gdb), which can only access unprivileged
  registers;
- enable MTTCG for target/xtensa;
- cleanup in linux-user/mmap area making sure that it works correctly
  with limited 30-bit-wide user address space;
- import xtensa-specific definitions from the linux kernel,
  conditionalize user-only/softmmu-only code and add handlers for
  signals, exceptions, process/thread creation and core registers dumping.

# gpg: Signature made Fri 16 Mar 2018 16:46:19 GMT
# gpg:                using RSA key 51F9CC91F83FA044
# gpg: Good signature from "Max Filippov <filippov@cadence.com>"
# gpg:                 aka "Max Filippov <max.filippov@cogentembedded.com>"
# gpg:                 aka "Max Filippov <jcmvbkbc@gmail.com>"
# Primary key fingerprint: 2B67 854B 98E5 327D CDEB  17D8 51F9 CC91 F83F A044

* remotes/xtensa/tags/20180316-xtensa:
  MAINTAINERS: fix W: address for xtensa
  qemu-binfmt-conf.sh: add qemu-xtensa
  target/xtensa: add linux-user support
  linux-user: drop unused target_msync function
  linux-user: fix target_mprotect/target_munmap error return values
  linux-user: fix assertion in shmdt
  linux-user: fix mmap/munmap/mprotect/mremap/shmat
  target/xtensa: support MTTCG
  target/xtensa: use correct number of registers in gdbstub
  target/xtensa: mark register windows in the dump
  target/xtensa: dump correct physical registers

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

# Conflicts:
#	linux-user/syscall.c

1 files changed, 62 insertions, 3 deletions

diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index e53583e921..13fe840239 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -71,7 +71,8 @@
     || defined(TARGET_M68K) || defined(TARGET_CRIS) \
     || defined(TARGET_S390X) \
     || defined(TARGET_OPENRISC) || defined(TARGET_TILEGX) \
-    || defined(TARGET_NIOS2) || defined(TARGET_RISCV)
+    || defined(TARGET_NIOS2) || defined(TARGET_RISCV) \
+    || defined(TARGET_XTENSA)
 
 #define TARGET_IOC_SIZEBITS	14
 #define TARGET_IOC_DIRBITS	2
@@ -423,7 +424,7 @@ int do_sigaction(int sig, const struct target_sigaction *act,
     || defined(TARGET_MICROBLAZE) \
     || defined(TARGET_S390X) || defined(TARGET_OPENRISC) \
     || defined(TARGET_TILEGX) || defined(TARGET_HPPA) || defined(TARGET_NIOS2) \
-    || defined(TARGET_RISCV)
+    || defined(TARGET_RISCV) || defined(TARGET_XTENSA)
 
 #if defined(TARGET_SPARC)
 #define TARGET_SA_NOCLDSTOP    8u
@@ -1379,6 +1380,18 @@ struct target_winsize {
 #define TARGET_MAP_NONBLOCK	0x20000		/* do not block on IO */
 #define TARGET_MAP_STACK        0x40000         /* ignored */
 #define TARGET_MAP_HUGETLB      0x80000         /* create a huge page mapping */
+#elif defined(TARGET_XTENSA)
+#define TARGET_MAP_FIXED	0x10		/* Interpret addr exactly */
+#define TARGET_MAP_ANONYMOUS	0x0800		/* don't use a file */
+#define TARGET_MAP_GROWSDOWN	0x1000		/* stack-like segment */
+#define TARGET_MAP_DENYWRITE	0x2000		/* ETXTBSY */
+#define TARGET_MAP_EXECUTABLE	0x4000		/* mark it as an executable */
+#define TARGET_MAP_LOCKED	0x8000		/* pages are locked */
+#define TARGET_MAP_NORESERVE	0x0400		/* don't check for reservations */
+#define TARGET_MAP_POPULATE	0x10000		/* populate (prefault) pagetables */
+#define TARGET_MAP_NONBLOCK	0x20000		/* do not block on IO */
+#define TARGET_MAP_STACK	0x40000
+#define TARGET_MAP_HUGETLB  0x80000         /* create a huge page mapping */
 #else
 #define TARGET_MAP_FIXED	0x10		/* Interpret addr exactly */
 #define TARGET_MAP_ANONYMOUS	0x20		/* don't use a file */
@@ -2080,6 +2093,51 @@ struct target_stat {
     abi_ulong  target_st_ctime_nsec;
     unsigned int __unused[2];
 };
+#elif defined(TARGET_XTENSA)
+struct target_stat {
+    abi_ulong       st_dev;
+    abi_ulong       st_ino;
+    unsigned int    st_mode;
+    unsigned int    st_nlink;
+    unsigned int    st_uid;
+    unsigned int    st_gid;
+    abi_ulong       st_rdev;
+    abi_long        st_size;
+    abi_ulong       st_blksize;
+    abi_ulong       st_blocks;
+    abi_ulong       target_st_atime;
+    abi_ulong       target_st_atime_nsec;
+    abi_ulong       target_st_mtime;
+    abi_ulong       target_st_mtime_nsec;
+    abi_ulong       target_st_ctime;
+    abi_ulong       target_st_ctime_nsec;
+    abi_ulong       __unused4;
+    abi_ulong       __unused5;
+};
+
+#define TARGET_HAS_STRUCT_STAT64
+struct target_stat64  {
+    uint64_t st_dev;            /* Device */
+    uint64_t st_ino;            /* File serial number */
+    unsigned int  st_mode;      /* File mode. */
+    unsigned int  st_nlink;     /* Link count. */
+    unsigned int  st_uid;       /* User ID of the file's owner. */
+    unsigned int  st_gid;       /* Group ID of the file's group. */
+    uint64_t st_rdev;           /* Device number, if device. */
+    int64_t st_size;            /* Size of file, in bytes. */
+    abi_ulong st_blksize;       /* Optimal block size for I/O. */
+    abi_ulong __unused2;
+    uint64_t st_blocks;         /* Number 512-byte blocks allocated. */
+    abi_ulong target_st_atime;  /* Time of last access. */
+    abi_ulong target_st_atime_nsec;
+    abi_ulong target_st_mtime;  /* Time of last modification. */
+    abi_ulong target_st_mtime_nsec;
+    abi_ulong target_st_ctime;  /* Time of last status change. */
+    abi_ulong target_st_ctime_nsec;
+    abi_ulong __unused4;
+    abi_ulong __unused5;
+};
+
 #elif defined(TARGET_OPENRISC) || defined(TARGET_TILEGX) || \
       defined(TARGET_NIOS2) || defined(TARGET_RISCV)
 
@@ -2590,7 +2648,8 @@ struct target_flock64 {
     short  l_whence;
 #if defined(TARGET_PPC) || defined(TARGET_X86_64) || defined(TARGET_MIPS) \
     || defined(TARGET_SPARC) || defined(TARGET_HPPA) \
-    || defined(TARGET_MICROBLAZE) || defined(TARGET_TILEGX)
+    || defined(TARGET_MICROBLAZE) || defined(TARGET_TILEGX) \
+    || defined(TARGET_XTENSA)
     int __pad;
 #endif
     abi_llong l_start;