Merge remote-tracking branch 'remotes/stsquad/tags/pull-testing-and-gdbstub-170320-1' into staging

Testing and gdbstub updates:

  - docker updates for VirGL
  - re-factor gdbstub for static GDBState
  - re-factor gdbstub for dynamic arrays
  - add SVE support to arm gdbstub
  - add some guest debug tests to check-tcg
  - add aarch64 userspace register tests
  - remove packet size limit to gdbstub
  - simplify gdbstub monitor code
  - report vContSupported in gdbstub to use proper single-step

# gpg: Signature made Tue 17 Mar 2020 17:47:46 GMT
# gpg:                using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [full]
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8  DF35 FBD0 DB09 5A9E 2A44

* remotes/stsquad/tags/pull-testing-and-gdbstub-170320-1: (28 commits)
  gdbstub: Fix single-step issue by confirming 'vContSupported+' feature to gdb
  gdbstub: do not split gdb_monitor_write payload
  gdbstub: change GDBState.last_packet to GByteArray
  tests/tcg/aarch64: add test-sve-ioctl guest-debug test
  tests/tcg/aarch64: add SVE iotcl test
  tests/tcg/aarch64: add a gdbstub testcase for SVE registers
  tests/guest-debug: add a simple test runner
  configure: allow user to specify what gdb to use
  tests/tcg/aarch64: userspace system register test
  target/arm: don't bother with id_aa64pfr0_read for USER_ONLY
  target/arm: generate xml description of our SVE registers
  target/arm: default SVE length to 64 bytes for linux-user
  target/arm: explicitly encode regnum in our XML
  target/arm: prepare for multiple dynamic XMLs
  gdbstub: extend GByteArray to read register helpers
  target/i386: use gdb_get_reg helpers
  target/m68k: use gdb_get_reg helpers
  target/arm: use gdb_get_reg helpers
  gdbstub: add helper for 128 bit registers
  gdbstub: move mem_buf to GDBState and use GByteArray
  ...

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

1 files changed, 26 insertions, 22 deletions

diff --git a/target/ppc/gdbstub.c b/target/ppc/gdbstub.c
index 823759c92e..eb362dd9ae 100644
--- a/target/ppc/gdbstub.c
+++ b/target/ppc/gdbstub.c
@@ -114,10 +114,11 @@ void ppc_maybe_bswap_register(CPUPPCState *env, uint8_t *mem_buf, int len)
  * the FP regs zero size when talking to a newer gdb.
  */
 
-int ppc_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
+int ppc_cpu_gdb_read_register(CPUState *cs, GByteArray *buf, int n)
 {
     PowerPCCPU *cpu = POWERPC_CPU(cs);
     CPUPPCState *env = &cpu->env;
+    uint8_t *mem_buf;
     int r = ppc_gdb_register_len(n);
 
     if (!r) {
@@ -126,17 +127,17 @@ int ppc_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
 
     if (n < 32) {
         /* gprs */
-        gdb_get_regl(mem_buf, env->gpr[n]);
+        gdb_get_regl(buf, env->gpr[n]);
     } else if (n < 64) {
         /* fprs */
-        stfq_p(mem_buf, *cpu_fpr_ptr(env, n - 32));
+        gdb_get_reg64(buf, *cpu_fpr_ptr(env, n - 32));
     } else {
         switch (n) {
         case 64:
-            gdb_get_regl(mem_buf, env->nip);
+            gdb_get_regl(buf, env->nip);
             break;
         case 65:
-            gdb_get_regl(mem_buf, env->msr);
+            gdb_get_regl(buf, env->msr);
             break;
         case 66:
             {
@@ -145,31 +146,33 @@ int ppc_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
                 for (i = 0; i < 8; i++) {
                     cr |= env->crf[i] << (32 - ((i + 1) * 4));
                 }
-                gdb_get_reg32(mem_buf, cr);
+                gdb_get_reg32(buf, cr);
                 break;
             }
         case 67:
-            gdb_get_regl(mem_buf, env->lr);
+            gdb_get_regl(buf, env->lr);
             break;
         case 68:
-            gdb_get_regl(mem_buf, env->ctr);
+            gdb_get_regl(buf, env->ctr);
             break;
         case 69:
-            gdb_get_reg32(mem_buf, env->xer);
+            gdb_get_reg32(buf, env->xer);
             break;
         case 70:
-            gdb_get_reg32(mem_buf, env->fpscr);
+            gdb_get_reg32(buf, env->fpscr);
             break;
         }
     }
+    mem_buf = buf->data + buf->len - r;
     ppc_maybe_bswap_register(env, mem_buf, r);
     return r;
 }
 
-int ppc_cpu_gdb_read_register_apple(CPUState *cs, uint8_t *mem_buf, int n)
+int ppc_cpu_gdb_read_register_apple(CPUState *cs, GByteArray *buf, int n)
 {
     PowerPCCPU *cpu = POWERPC_CPU(cs);
     CPUPPCState *env = &cpu->env;
+    uint8_t *mem_buf;
     int r = ppc_gdb_register_len_apple(n);
 
     if (!r) {
@@ -178,21 +181,21 @@ int ppc_cpu_gdb_read_register_apple(CPUState *cs, uint8_t *mem_buf, int n)
 
     if (n < 32) {
         /* gprs */
-        gdb_get_reg64(mem_buf, env->gpr[n]);
+        gdb_get_reg64(buf, env->gpr[n]);
     } else if (n < 64) {
         /* fprs */
-        stfq_p(mem_buf, *cpu_fpr_ptr(env, n - 32));
+        gdb_get_reg64(buf, *cpu_fpr_ptr(env, n - 32));
     } else if (n < 96) {
         /* Altivec */
-        stq_p(mem_buf, n - 64);
-        stq_p(mem_buf + 8, 0);
+        gdb_get_reg64(buf, n - 64);
+        gdb_get_reg64(buf, 0);
     } else {
         switch (n) {
         case 64 + 32:
-            gdb_get_reg64(mem_buf, env->nip);
+            gdb_get_reg64(buf, env->nip);
             break;
         case 65 + 32:
-            gdb_get_reg64(mem_buf, env->msr);
+            gdb_get_reg64(buf, env->msr);
             break;
         case 66 + 32:
             {
@@ -201,23 +204,24 @@ int ppc_cpu_gdb_read_register_apple(CPUState *cs, uint8_t *mem_buf, int n)
                 for (i = 0; i < 8; i++) {
                     cr |= env->crf[i] << (32 - ((i + 1) * 4));
                 }
-                gdb_get_reg32(mem_buf, cr);
+                gdb_get_reg32(buf, cr);
                 break;
             }
         case 67 + 32:
-            gdb_get_reg64(mem_buf, env->lr);
+            gdb_get_reg64(buf, env->lr);
             break;
         case 68 + 32:
-            gdb_get_reg64(mem_buf, env->ctr);
+            gdb_get_reg64(buf, env->ctr);
             break;
         case 69 + 32:
-            gdb_get_reg32(mem_buf, env->xer);
+            gdb_get_reg32(buf, env->xer);
             break;
         case 70 + 32:
-            gdb_get_reg64(mem_buf, env->fpscr);
+            gdb_get_reg64(buf, env->fpscr);
             break;
         }
     }
+    mem_buf = buf->data + buf->len - r;
     ppc_maybe_bswap_register(env, mem_buf, r);
     return r;
 }