| The Android Open Source Project | f6c3871 | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 1 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> |
| 2 | |
| 3 | <html> |
| 4 | |
| 5 | <head> |
| 6 | <title>move-exception</title> |
| 7 | <link rel=stylesheet href="opcode.css"> |
| 8 | </head> |
| 9 | |
| 10 | <body> |
| 11 | |
| 12 | <h1>move-exception</h1> |
| 13 | |
| 14 | <h2>Purpose</h2> |
| 15 | |
| 16 | <p> |
| 17 | Save a just-caught exception into the given register. This should be the first |
| 18 | instruction of any exception handler whose caught exception is not to be |
| 19 | ignored, and this instruction may only ever occur as the first instruction of an |
| Carl Shapiro | de75089 | 2010-06-08 16:37:12 -0700 | [diff] [blame] | 20 | exception handler; anywhere else is invalid. |
| The Android Open Source Project | f6c3871 | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 21 | </p> |
| 22 | |
| 23 | <h2>Details</h2> |
| 24 | |
| 25 | <table class="instruc"> |
| 26 | <thead> |
| 27 | <tr> |
| 28 | <th>Op & Format</th> |
| 29 | <th>Mnemonic / Syntax</th> |
| 30 | <th>Arguments</th> |
| 31 | </tr> |
| 32 | </thead> |
| 33 | <tbody> |
| 34 | <tr> |
| 35 | <td>0d 11x</td> |
| 36 | <td>move-exception vAA</td> |
| 37 | <td><code>A:</code> destination register (8 bits)</td> |
| 38 | </tr> |
| 39 | </tbody> |
| 40 | </table> |
| 41 | |
| 42 | <h2>Constraints</h2> |
| 43 | |
| 44 | <ul> |
| 45 | <li> |
| 46 | A must be a valid register index in the current stack frame. |
| 47 | </li> |
| 48 | <li> |
| 49 | The instruction must be the first instruction (in the code array) of an |
| 50 | instruction handler, that is, its offset in the code array must match one of |
| 51 | the handlers defined for the method in the Dex file. |
| 52 | </li> |
| 53 | </ul> |
| Carl Shapiro | de75089 | 2010-06-08 16:37:12 -0700 | [diff] [blame] | 54 | |
| The Android Open Source Project | f6c3871 | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 55 | <h2>Behavior</h2> |
| 56 | |
| 57 | <ul> |
| 58 | <li> |
| 59 | The active exception of the current thread is moved to register vA, that is, |
| 60 | vA' = exception. |
| 61 | </li> |
| 62 | <li> |
| 63 | If register v(A-1) is the lower half of a register pair, register v(A-1)' |
| 64 | becomes undefined. |
| 65 | </li> |
| 66 | <li> |
| 67 | If register v(A+1) is the upper half of a register pair, register v(A+1)' |
| 68 | becomes undefined. |
| 69 | </li> |
| 70 | </ul> |
| 71 | |
| 72 | <h2>Exceptions</h2> |
| 73 | |
| 74 | <p> |
| 75 | None. |
| 76 | </p> |
| 77 | |
| 78 | </body> |
| 79 | </html> |