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Author	SHA1	Message	Date
Boris Gjenero	4077eac839	Fix return address when data_abort_handler skips faulting instruction. When writing a value to PC, execution continues at that location, so subtracting 4 returns to the next instruction. Previously, two instructions after the faulting instruction were being skipped, causing safe_read functions to return true even if a data abort happened. Change-Id: I3fd02d54646323ea2050d0504e38f6d22f09c749	2013-05-23 19:51:19 -04:00
Amaury Pouly	1a4fa1603b	unwarminder: fix data_abort_handler (wrong address to UIE) Change-Id: I060735363f2e408c42a8e11ac1f31dc96e3cb2d6	2012-06-07 14:48:43 +02:00
Amaury Pouly	d4674ed3b7	arm: implement safe reads by intercepting the data abort handler. Implement functions to read from a memory location and indicate failure in case this is not possible. Since we do not have a MMU, intercept the data abort handler and simply return when the abort comes from the safe read routines. Change-Id: I08f2e59898dcac893319a8150d4cf626f3adabbd Reviewed-on: http://gerrit.rockbox.org/207 Reviewed-by: Marcin Bukat <marcin.bukat@gmail.com>	2012-04-06 13:48:09 +02:00

Author

SHA1

Message

Date

Boris Gjenero

4077eac839

Fix return address when data_abort_handler skips faulting instruction.

When writing a value to PC, execution continues at that location,
so subtracting 4 returns to the next instruction. Previously, two
instructions after the faulting instruction were being skipped, causing
safe_read functions to return true even if a data abort happened.

Change-Id: I3fd02d54646323ea2050d0504e38f6d22f09c749

2013-05-23 19:51:19 -04:00

Amaury Pouly

1a4fa1603b

unwarminder: fix data_abort_handler (wrong address to UIE)

Change-Id: I060735363f2e408c42a8e11ac1f31dc96e3cb2d6

2012-06-07 14:48:43 +02:00

Amaury Pouly

d4674ed3b7

arm: implement safe reads by intercepting the data abort handler.

Implement functions to read from a memory location and indicate
failure in case this is not possible. Since we do not have a MMU,
intercept the data abort handler and simply return when the abort
comes from the safe read routines.

Change-Id: I08f2e59898dcac893319a8150d4cf626f3adabbd
Reviewed-on: http://gerrit.rockbox.org/207
Reviewed-by: Marcin Bukat <marcin.bukat@gmail.com>

2012-04-06 13:48:09 +02:00

3 commits