Android: Improve :dm to find DEX files mapped in memory

[enovella]

R2Frida memory maps listing doesn't show up the filetype

[0x00000000]> :dm~0x7baa1dd000
[0x00000000]> :dm~7baa1dd000
0x0000007baa1bd000 - 0x0000007baa1dd000 rw-
0x0000007baa1dd000 - 0x0000007baa1fe000 r--
[0x00000000]> x 16 @ 0x7baa1dd000
- offset -     0 1  2 3  4 5  6 7  8 9  A B  C D  E F  0123456789ABCDEF
0x7baa1dd000  6465 780a 3033 3700 4283 41de bc18 0649  dex.037.B.A....I
[0x00000000]> x 16 @ 0x7c2cc71000
- offset -     0 1  2 3  4 5  6 7  8 9  A B  C D  E F  0123456789ABCDEF
0x7c2cc71000  6465 780a 3033 3700 66ce 2964 f478 4193  dex.037.f.)d.xA.
[0x00000000]> :dm~7c2cc71000
0x0000007c2cc70000 - 0x0000007c2cc71000 r-- /apex/com.android.art/lib64/libopenjdkjvm.so
0x0000007c2cc71000 - 0x0000007c2cc75000 r--

DEX files in memory maps

$ adb shell
$ grep dalvik-DEX /proc/25943/maps
7b8cf77000-7b8cf89000 r--p 00000000 00:00 0                              [anon:dalvik-DEX data]
7bab48e000-7bab4af000 r--p 00000000 00:00 0                              [anon:dalvik-DEX data]
7c1cfb0000-7c1cfc0000 r--p 00000000 00:00 0                              [anon:dalvik-DEX data]
7c1d203000-7c1d21c000 r--p 00000000 00:00 0                              [anon:dalvik-DEX data]
7c1d220000-7c1d224000 r--p 00000000 00:00 0                              [anon:dalvik-DEX data]
7c23d19000-7c23d21000 r--p 00000000 00:00 0                              [anon:dalvik-DEX data]
7c24a73000-7c24a79000 r--p 00000000 00:00 0                              [anon:dalvik-DEX data]
7c24fa3000-7c24fa7000 r--p 00000000 00:00 0                              [anon:dalvik-DEX data]
7c2c566000-7c2c56a000 r--p 00000000 00:00 0                              [anon:dalvik-DEX data]
7c2c998000-7c2c99c000 r--p 00000000 00:00 0                              [anon:dalvik-DEX data]
7c2cc3a000-7c2cc3e000 r--p 00000000 00:00 0                              [anon:dalvik-DEX data]
7c2cc71000-7c2cc75000 r--p 00000000 00:00 0                              [anon:dalvik-DEX data]
7c2e4fe000-7c2e502000 r--p 00000000 00:00 0                              [anon:dalvik-DEX data]
7c2e531000-7c2e535000 r--p 00000000 00:00 0                              [anon:dalvik-DEX data]
7c2e6c0000-7c2e6c4000 r--p 00000000 00:00 0                              [anon:dalvik-DEX data]
7c2e71c000-7c2e720000 r--p 00000000 00:00 0                              [anon:dalvik-DEX data]

Workaround

[trufae]

This required changes in Frida iirc @oleavr