[Xen-devel] [PATCH v6 13/17] xenctx: Add convert of more registers to symbols

[Don Slutz <dslutz@xxxxxxxxxxx>]

On 03/21/14 08:34, Don Slutz wrote:
> On 03/21/14 06:24, Jan Beulich wrote:
> >
> Looks like they can.
>
> > Also, using C99 (available as gcc extension) here may make this
> > a bit more legible:
> >
> > static const uint64_t cr_reg_mask[5] = { [2] = ~UINT64_C(0) };
> > static const uint64_t dr_reg_mask[8] = { [0 ... 3] = ~UINT64_C(0) };
> Will test that it works on CentOS 5.10 and a send a v6 of just this.
>
>    -Don Slutz
>
> > Jan
Here is v6:

From e418d907d55cdb5361879bbaea0c2b96443df846 Mon Sep 17 00:00:00 2001
From: Don Slutz <dslutz@xxxxxxxxxxx>
Date: Sat, 9 Nov 2013 20:32:40 -0500
Subject: [PATCH 13/17] xenctx: Add convert of more registers to symbols

For example can change:
 gs: 0000 @ ffffffff803ac000/0000000000000000
to
 gs: 0000 @ ffffffff803ac000/0000000000000000 boot_cpu_pda/

Signed-off-by: Don Slutz <dslutz@xxxxxxxxxxx>
---
 tools/xentrace/xenctx.c | 47 
+++++++++++++++++++++++++++++++++++------------
 1 file changed, 35 insertions(+), 12 deletions(-)

diff --git a/tools/xentrace/xenctx.c b/tools/xentrace/xenctx.c
index c574996..88dcaf7 100644
--- a/tools/xentrace/xenctx.c
+++ b/tools/xentrace/xenctx.c
@@ -106,6 +106,9 @@ unsigned long long kernel_start = 0xffffffff80000000UL;
 unsigned long long kernel_start = 0xffffff8000000000UL;
 #endif

+static const uint64_t cr_reg_mask[5] = { [2] = ~UINT64_C(0) };
+static const uint64_t dr_reg_mask[8] = { [0 ... 3] = ~UINT64_C(0) };
+
 static type_of_addr kernel_addr(guest_word_t addr)
 {
     if ( symbol_table == NULL )
@@ -330,17 +333,29 @@ static void print_flags(uint64_t flags)
     printf("\n");
 }

-static void print_special(void *regs, const char *name, unsigned int 
mask, int width)
+static void print_special(void *regs, const char *name, unsigned int mask,
+                          const uint64_t reg_is_addr_mask[], int width)
 {
     unsigned int i;

     printf("\n");
     for (i = 0; mask; mask >>= 1, ++i)
         if (mask & 1) {
-            if (width == 4)
-                printf("%s%u: %08"PRIx32"\n", name, i, ((uint32_t *) 
regs)[i]);
+            if ( width == 4 )
+            {
+                printf("%s%u: %08"PRIx32, name, i, ((uint32_t *) regs)[i]);
+                if ( reg_is_addr_mask[i] )
+                    print_symbol(reg_is_addr_mask[i] & ((uint32_t *) 
regs)[i],
+                                 KERNEL_DATA_ADDR);
+            }
             else
-                printf("%s%u: %08"PRIx64"\n", name, i, ((uint64_t *) 
regs)[i]);
+            {
+                printf("%s%u: %016"PRIx64, name, i, ((uint64_t *) 
regs)[i]);
+                if ( reg_is_addr_mask[i] )
+                    print_symbol(reg_is_addr_mask[i] & ((uint64_t *) 
regs)[i],
+                                 KERNEL_DATA_ADDR);
+            }
+            printf("\n");
         }
 }

@@ -368,8 +383,8 @@ static void print_ctx_32(vcpu_guest_context_x86_32_t 
*ctx)
     printf(" gs:     %04x\n", regs->gs);

     if (xenctx.disp_all) {
-        print_special(ctx->ctrlreg, "cr", 0x1d, 4);
-        print_special(ctx->debugreg, "dr", 0xcf, 4);
+        print_special(ctx->ctrlreg, "cr", 0x1d, cr_reg_mask, 4);
+        print_special(ctx->debugreg, "dr", 0xcf, dr_reg_mask, 4);
     }
 }

@@ -397,8 +412,8 @@ static void 
print_ctx_32on64(vcpu_guest_context_x86_64_t *ctx)
     printf(" gs:     %04x\n", regs->gs);

     if (xenctx.disp_all) {
-        print_special(ctx->ctrlreg, "cr", 0x1d, 4);
-        print_special(ctx->debugreg, "dr", 0xcf, 4);
+        print_special(ctx->ctrlreg, "cr", 0x1d, cr_reg_mask, 4);
+        print_special(ctx->debugreg, "dr", 0xcf, dr_reg_mask, 4);
     }
 }

@@ -436,13 +451,21 @@ static void 
print_ctx_64(vcpu_guest_context_x86_64_t *ctx)
     printf(" ds: %04x\t", regs->ds);
     printf(" es: %04x\n", regs->es);

-    printf(" fs: %04x @ %016"PRIx64"\n", regs->fs, ctx->fs_base);
-    printf(" gs: %04x @ %016"PRIx64"/%016"PRIx64"\n", regs->gs,
+    printf(" fs: %04x @ %016"PRIx64, regs->fs, ctx->fs_base);
+    print_symbol(ctx->fs_base, KERNEL_DATA_ADDR);
+    printf("\n");
+    printf(" gs: %04x @ %016"PRIx64"/%016"PRIx64, regs->gs,
            ctx->gs_base_kernel, ctx->gs_base_user);
+    if (symbol_table) {
+        print_symbol(ctx->gs_base_kernel, KERNEL_DATA_ADDR);
+        printf("/");
+        print_symbol(ctx->gs_base_user, KERNEL_DATA_ADDR);
+    }
+    printf("\n");

     if (xenctx.disp_all) {
-        print_special(ctx->ctrlreg, "cr", 0x1d, 8);
-        print_special(ctx->debugreg, "dr", 0xcf, 8);
+        print_special(ctx->ctrlreg, "cr", 0x1d, cr_reg_mask, 8);
+        print_special(ctx->debugreg, "dr", 0xcf, dr_reg_mask, 8);
     }
 }

--
1.7.11.7

   -Don Slutz

Attachment: 0013-xenctx-Add-convert-of-more-registers-to-symbols.patch
Description: Text Data

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