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| author | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2019-04-12 16:26:52 +0100 |
|---|---|---|
| committer | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2019-05-01 10:46:59 +0100 |
| commit | 574d96933ceff60b2d13fe97602572fc7e95f7c6 (patch) | |
| tree | ec4a2ca2ebff19f5620c50a147d972562928866e | |
| parent | b4e492db03a25395087e867f8f944f7b2a2e1cef (diff) | |
| download | qemu-574d96933ceff60b2d13fe97602572fc7e95f7c6.zip qemu-574d96933ceff60b2d13fe97602572fc7e95f7c6.tar.gz qemu-574d96933ceff60b2d13fe97602572fc7e95f7c6.tar.bz2 | |
hmp: gva2gpa debug command
Add a gva2gpa command purely for debug which performs
address translation on the gva, the existing gpa2hva
command can then also be used to find it in the qemu
userspace; e.g.
(qemu) info registers
.... RSP=ffffffff81c03e98
....
(qemu) gva2gpa 0xffffffff81c03e98
gpa: 0x1c03e98
(qemu) gpa2hva 0x1c03e98
Host virtual address for 0x1c03e98 (pc.ram) is 0x7f0599a03e98
(qemu) x/10x 0xffffffff81c03e98
ffffffff81c03e98: 0x81c03eb8 0xffffffff 0x8101ea3f 0xffffffff
ffffffff81c03ea8: 0x81d27b00 0xffffffff 0x00000000 0x00000000
ffffffff81c03eb8: 0x81c03ec8 0xffffffff
gdb -p ...qemu...
(gdb) x/10x 0x7f0599a03e98
0x7f0599a03e98: 0x81c03eb8 0xffffffff 0x8101ea3f 0xffffffff
0x7f0599a03ea8: 0x81d27b00 0xffffffff 0x00000000 0x00000000
0x7f0599a03eb8: 0x81c03ec8 0xffffffff
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20190412152652.827-1-dgilbert@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
| -rw-r--r-- | hmp-commands.hx | 15 | ||||
| -rw-r--r-- | monitor.c | 22 | ||||
| -rw-r--r-- | tests/test-hmp.c | 1 |
3 files changed, 38 insertions, 0 deletions
diff --git a/hmp-commands.hx b/hmp-commands.hx index 9b40359..a2c3ffc 100644 --- a/hmp-commands.hx +++ b/hmp-commands.hx @@ -588,6 +588,21 @@ is mapped. ETEXI { + .name = "gva2gpa", + .args_type = "addr:l", + .params = "addr", + .help = "print the guest physical address corresponding to a guest virtual address", + .cmd = hmp_gva2gpa, + }, + +STEXI +@item gva2gpa @var{addr} +@findex gva2gpa +Print the guest physical address at which the guest's virtual address @var{addr} +is mapped based on the mapping for the current CPU. +ETEXI + + { .name = "p|print", .args_type = "fmt:/,val:l", .params = "/fmt expr", @@ -1673,6 +1673,28 @@ static void hmp_gpa2hva(Monitor *mon, const QDict *qdict) memory_region_unref(mr); } +static void hmp_gva2gpa(Monitor *mon, const QDict *qdict) +{ + target_ulong addr = qdict_get_int(qdict, "addr"); + MemTxAttrs attrs; + CPUState *cs = mon_get_cpu(); + hwaddr gpa; + + if (!cs) { + monitor_printf(mon, "No cpu\n"); + return; + } + + gpa = cpu_get_phys_page_attrs_debug(mon_get_cpu(), + addr & TARGET_PAGE_MASK, &attrs); + if (gpa == -1) { + monitor_printf(mon, "Unmapped\n"); + } else { + monitor_printf(mon, "gpa: %#" HWADDR_PRIx "\n", + gpa + (addr & ~TARGET_PAGE_MASK)); + } +} + #ifdef CONFIG_LINUX static uint64_t vtop(void *ptr, Error **errp) { diff --git a/tests/test-hmp.c b/tests/test-hmp.c index 54a0182..e344947 100644 --- a/tests/test-hmp.c +++ b/tests/test-hmp.c @@ -39,6 +39,7 @@ static const char *hmp_cmds[] = { "dump-guest-memory /dev/null 0 4096", "dump-guest-memory /dev/null", "gdbserver", + "gva2gpa 0", "hostfwd_add tcp::43210-:43210", "hostfwd_remove tcp::43210-:43210", "i /w 0", |