linux-user: fix 32bit g2h()/h2g()

sparc32plus has 64bit long type but only 32bit virtual address space.

For instance, "apt-get upgrade" failed because of a mmap()/msync()
sequence.

mmap() returned 0xff252000 but msync() used g2h(0xffffffffff252000)
to find the host address. The "(target_ulong)" in g2h() doesn't fix the
address because it is 64bit long.

This patch introduces an "abi_ptr" that is set to uint32_t
if the virtual address space is addressed using 32bit in the linux-user
case. It stays set to target_ulong with softmmu case.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20180814171217.14680-1-laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
[lv: added "%" in TARGET_ABI_FMT_ptr "%"PRIx64]

linux-user/syscall.c

@@ -7644,7 +7644,7 @@ static int open_self_maps(void *cpu_env, int fd)
             if (h2g(min) == ts->info->stack_limit) {
                 pstrcpy(path, sizeof(path), "      [stack]");
             }
-            dprintf(fd, TARGET_ABI_FMT_lx "-" TARGET_ABI_FMT_lx
+            dprintf(fd, TARGET_ABI_FMT_ptr "-" TARGET_ABI_FMT_ptr
                     " %c%c%c%c %08" PRIx64 " %02x:%02x %d %s%s\n",
                     h2g(min), h2g(max - 1) + 1, flag_r, flag_w,
                     flag_x, flag_p, offset, dev_maj, dev_min, inode,