Merge tag 'pull-10.0-gdb-plugins-doc-updates-170125-1' of https://gitlab.com/stsquad/qemu into staging

semihosting, plugin and doc updates:

  - log a guest_error for failed semihosting open()
  - clean up semihosting includes to reduce build duplication
  - re-factor misc device initialisation to fail with &error_exit
  - propagate Error * to gdbserver_start sub-functions
  - fix 32-bit build of plugins and re-enable by default
  - ensure IRQs don't preempt io recompiled instructions
  - remove usage of gcc_struct to enable clang builds
  - enable clang/lld to build plugins on windows
  - various small kdoc typo fixes
  - add perl scripts to editorconfig
  - remove unused field from MemoryRegion
  - make kdoc script a dependency so doc rebuilds get triggered
  - expand developer documentation:
    - notes on git-publish
    - describe usage of b4
    - setting up build dependencies
    - codebase layout
    - add a glossary of common terms
  -  optimise the windows ndis script

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* tag 'pull-10.0-gdb-plugins-doc-updates-170125-1' of https://gitlab.com/stsquad/qemu: (37 commits)
  scripts/nsis.py: Run dependency check for each DLL file only once
  docs: add a glossary
  docs/devel: add a codebase section
  docs/devel: add information on how to setup build environments
  docs/devel: add b4 for patch retrieval
  docs/devel: add git-publish for patch submitting
  docs/sphinx: include kernel-doc script as a dependency
  include/exec: remove warning_printed from MemoryRegion
  include/exec: fix some copy and paste errors in kdoc
  tests/qtest: fix some copy and paste errors in kdoc
  editorconfig: update for perl scripts
  plugins: fix kdoc annotation
  plugins: enable linking with clang/lld
  docs/devel/style: add a section about bitfield, and disallow them for packed structures
  win32: remove usage of attribute gcc_struct
  accel/tcg: also suppress asynchronous IRQs for cpu_io_recompile
  configure: reenable plugins by default for 32-bit hosts
  contrib/plugins/hotpages: fix 32-bit build
  contrib/plugins/hwprofile: fix 32-bit build
  contrib/plugins/cflow: fix 32-bit build
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 12 insertions, 10 deletions

diff --git a/gdbstub/user.c b/gdbstub/user.c
index 0b4bfa9c48..c2bdfc3d49 100644
--- a/gdbstub/user.c
+++ b/gdbstub/user.c
@@ -13,6 +13,7 @@
 #include "qemu/bitops.h"
 #include "qemu/cutils.h"
 #include "qemu/sockets.h"
+#include "qapi/error.h"
 #include "exec/hwaddr.h"
 #include "exec/tb-flush.h"
 #include "exec/gdbstub.h"
@@ -372,14 +373,14 @@ static bool gdb_accept_tcp(int gdb_fd)
     return true;
 }
 
-static int gdbserver_open_port(int port)
+static int gdbserver_open_port(int port, Error **errp)
 {
     struct sockaddr_in sockaddr;
     int fd, ret;
 
     fd = socket(PF_INET, SOCK_STREAM, 0);
     if (fd < 0) {
-        perror("socket");
+        error_setg_errno(errp, errno, "Failed to create socket");
         return -1;
     }
     qemu_set_cloexec(fd);
@@ -391,13 +392,13 @@ static int gdbserver_open_port(int port)
     sockaddr.sin_addr.s_addr = 0;
     ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr));
     if (ret < 0) {
-        perror("bind");
+        error_setg_errno(errp, errno, "Failed to bind socket");
         close(fd);
         return -1;
     }
     ret = listen(fd, 1);
     if (ret < 0) {
-        perror("listen");
+        error_setg_errno(errp, errno, "Failed to listen to socket");
         close(fd);
         return -1;
     }
@@ -405,31 +406,32 @@ static int gdbserver_open_port(int port)
     return fd;
 }
 
-int gdbserver_start(const char *port_or_path)
+bool gdbserver_start(const char *port_or_path, Error **errp)
 {
     int port = g_ascii_strtoull(port_or_path, NULL, 10);
     int gdb_fd;
 
     if (port > 0) {
-        gdb_fd = gdbserver_open_port(port);
+        gdb_fd = gdbserver_open_port(port, errp);
     } else {
         gdb_fd = gdbserver_open_socket(port_or_path);
     }
 
     if (gdb_fd < 0) {
-        return -1;
+        return false;
     }
 
     if (port > 0 && gdb_accept_tcp(gdb_fd)) {
-        return 0;
+        return true;
     } else if (gdb_accept_socket(gdb_fd)) {
         gdbserver_user_state.socket_path = g_strdup(port_or_path);
-        return 0;
+        return true;
     }
 
     /* gone wrong */
     close(gdb_fd);
-    return -1;
+    error_setg(errp, "gdbstub: failed to accept connection");
+    return false;
 }
 
 void gdbserver_fork_start(void)