Merge tag 'pull-maintainer-updates-090224-1' of https://gitlab.com/stsquad/qemu into staging

testing, doc and gdbstub updates:

  - add sqlite3 to openSUSE image
  - mark CRIS as deprecated
  - re-enable the TCG plugin tests
  - use select for semihosting
  - implement syscall catching in gdbstub

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* tag 'pull-maintainer-updates-090224-1' of https://gitlab.com/stsquad/qemu:
  tests/tcg: Add the syscall catchpoint gdbstub test
  gdbstub: Implement catching syscalls
  gdbstub: Add syscall entry/return hooks
  gdbstub: Allow specifying a reason in stop packets
  gdbstub: Expose TARGET_SIGTRAP in a target-agnostic way
  kconfig: use "select" to enable semihosting
  Revert "hw/elf_ops: Ignore loadable segments with zero size"
  configure: run plugin TCG tests again
  docs: mark CRIS support as deprecated
  tests/docker: Add sqlite3 module to openSUSE Leap container

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

3 files changed, 68 insertions, 43 deletions

diff --git a/include/gdbstub/user.h b/include/gdbstub/user.h
index d392e51..68b6534 100644
--- a/include/gdbstub/user.h
+++ b/include/gdbstub/user.h
@@ -10,9 +10,10 @@
 #define GDBSTUB_USER_H
 
 /**
- * gdb_handlesig() - yield control to gdb
+ * gdb_handlesig_reason() - yield control to gdb
  * @cpu: CPU
  * @sig: if non-zero, the signal number which caused us to stop
+ * @reason: stop reason for stop reply packet or NULL
  *
  * This function yields control to gdb, when a user-mode-only target
  * needs to stop execution. If @sig is non-zero, then we will send a
@@ -24,7 +25,18 @@
  * or 0 if no signal should be delivered, ie the signal that caused
  * us to stop should be ignored.
  */
-int gdb_handlesig(CPUState *, int);
+int gdb_handlesig_reason(CPUState *, int, const char *);
+
+/**
+ * gdb_handlesig() - yield control to gdb
+ * @cpu CPU
+ * @sig: if non-zero, the signal number which caused us to stop
+ * @see gdb_handlesig_reason()
+ */
+static inline int gdb_handlesig(CPUState *cpu, int sig)
+{
+    return gdb_handlesig_reason(cpu, sig, NULL);
+}
 
 /**
  * gdb_signalled() - inform remote gdb of sig exit
@@ -39,5 +51,18 @@ void gdb_signalled(CPUArchState *as, int sig);
  */
 void gdbserver_fork(CPUState *cs);
 
+/**
+ * gdb_syscall_entry() - inform gdb of syscall entry and yield control to it
+ * @cs: CPU
+ * @num: syscall number
+ */
+void gdb_syscall_entry(CPUState *cs, int num);
+
+/**
+ * gdb_syscall_entry() - inform gdb of syscall return and yield control to it
+ * @cs: CPU
+ * @num: syscall number
+ */
+void gdb_syscall_return(CPUState *cs, int num);
 
 #endif /* GDBSTUB_USER_H */
diff --git a/include/hw/elf_ops.h b/include/hw/elf_ops.h
index 3e966dd..9c35d1b 100644
--- a/include/hw/elf_ops.h
+++ b/include/hw/elf_ops.h
@@ -427,16 +427,6 @@ static ssize_t glue(load_elf, SZ)(const char *name, int fd,
             file_size = ph->p_filesz; /* Size of the allocated data */
             data_offset = ph->p_offset; /* Offset where the data is located */
 
-            /*
-             * Some ELF files really do have segments of zero size;
-             * just ignore them rather than trying to set the wrong addr,
-             * or create empty ROM blobs, because the zero-length blob can
-             * falsely trigger the overlapping-ROM-blobs check.
-             */
-            if (mem_size == 0) {
-                continue;
-            }
-
             if (file_size > 0) {
                 if (g_mapped_file_get_length(mapped_file) <
                     file_size + data_offset) {
@@ -540,38 +530,45 @@ static ssize_t glue(load_elf, SZ)(const char *name, int fd,
                 *pentry = ehdr.e_entry - ph->p_vaddr + ph->p_paddr;
             }
 
-            if (load_rom) {
-                g_autofree char *label =
-                    g_strdup_printf("%s ELF program header segment %d",
-                                    name, i);
-
-                /*
-                 * rom_add_elf_program() takes its own reference to
-                 * 'mapped_file'.
-                 */
-                rom_add_elf_program(label, mapped_file, data, file_size,
-                                    mem_size, addr, as);
-            } else {
-                MemTxResult res;
-
-                res = address_space_write(as ? as : &address_space_memory,
-                                          addr, MEMTXATTRS_UNSPECIFIED,
-                                          data, file_size);
-                if (res != MEMTX_OK) {
-                    goto fail;
-                }
-                /*
-                 * We need to zero'ify the space that is not copied
-                 * from file
-                 */
-                if (file_size < mem_size) {
-                    res = address_space_set(as ? as : &address_space_memory,
-                                            addr + file_size, 0,
-                                            mem_size - file_size,
-                                            MEMTXATTRS_UNSPECIFIED);
+            /* Some ELF files really do have segments of zero size;
+             * just ignore them rather than trying to create empty
+             * ROM blobs, because the zero-length blob can falsely
+             * trigger the overlapping-ROM-blobs check.
+             */
+            if (mem_size != 0) {
+                if (load_rom) {
+                    g_autofree char *label =
+                        g_strdup_printf("%s ELF program header segment %d",
+                                        name, i);
+
+                    /*
+                     * rom_add_elf_program() takes its own reference to
+                     * 'mapped_file'.
+                     */
+                    rom_add_elf_program(label, mapped_file, data, file_size,
+                                        mem_size, addr, as);
+                } else {
+                    MemTxResult res;
+
+                    res = address_space_write(as ? as : &address_space_memory,
+                                              addr, MEMTXATTRS_UNSPECIFIED,
+                                              data, file_size);
                     if (res != MEMTX_OK) {
                         goto fail;
                     }
+                    /*
+                     * We need to zero'ify the space that is not copied
+                     * from file
+                     */
+                    if (file_size < mem_size) {
+                        res = address_space_set(as ? as : &address_space_memory,
+                                                addr + file_size, 0,
+                                                mem_size - file_size,
+                                                MEMTXATTRS_UNSPECIFIED);
+                        if (res != MEMTX_OK) {
+                            goto fail;
+                        }
+                    }
                 }
             }
 
diff --git a/include/user/syscall-trace.h b/include/user/syscall-trace.h
index 557f881..b48b2b2 100644
--- a/include/user/syscall-trace.h
+++ b/include/user/syscall-trace.h
@@ -11,6 +11,7 @@
 #define SYSCALL_TRACE_H
 
 #include "exec/user/abitypes.h"
+#include "gdbstub/user.h"
 #include "qemu/plugin.h"
 #include "trace/trace-root.h"
 
@@ -20,7 +21,7 @@
  * could potentially unify the -strace code here as well.
  */
 
-static inline void record_syscall_start(void *cpu, int num,
+static inline void record_syscall_start(CPUState *cpu, int num,
                                         abi_long arg1, abi_long arg2,
                                         abi_long arg3, abi_long arg4,
                                         abi_long arg5, abi_long arg6,
@@ -29,11 +30,13 @@ static inline void record_syscall_start(void *cpu, int num,
     qemu_plugin_vcpu_syscall(cpu, num,
                              arg1, arg2, arg3, arg4,
                              arg5, arg6, arg7, arg8);
+    gdb_syscall_entry(cpu, num);
 }
 
-static inline void record_syscall_return(void *cpu, int num, abi_long ret)
+static inline void record_syscall_return(CPUState *cpu, int num, abi_long ret)
 {
     qemu_plugin_vcpu_syscall_ret(cpu, num, ret);
+    gdb_syscall_return(cpu, num);
 }