KThreadContext: Difference between revisions

(One intermediate revision by the same user not shown)

Line 37:

| u8[4]

| Debug info (read by the SVC handler):

0: Bit0: reschedule. Bit1: switch context. If non zero, and depending on <code>currentThread->shallTerminate</code>, send thread exit debug events after handling valid/authorized SVCs (except 0xFF). Cleared to zero after handling.

0: Bit0: reschedule. Bit1: switch context. If non zero, and depending on <code>currentThread->shallTerminate</code>, send thread exit debug events after handling valid/authorized SVCs (except 0xFF). Cleared to zero after handling. Bit2: lock debug features

1: "Allow debug" flag from the process's exheader. If set, <code>{r0-r7, r12, lr}</code> will be pushed (they'll always be when handling invalid/unauthorized SVCs/SVC 0xFF).

1: "Allow debug" flag from the process's exheader. If set, <code>{r0-r7, r12, lr_svc}</code> will be pushed (they'll always be when handling invalid/unauthorized SVCs/SVC 0xFF). Needed for svcGetThreadContext and svcSetThreadContext to work properly in contexts other than exception handling (incl. hardware breakpoints). If lr_svc is set to one in this frame, the registers are reloaded from it (used with svcBreak, svc 0xff, etc).

2: ?

3: ID of the SVC being handled (reset to 0 when done).

|-

~~| 0xF4C (page_end - 0xB4)~~

~~| u32~~

~~| If non-zero, reloads <code>{r0-r7, r12, lr}</code> (otherwise skipped) from the stack after handling a SVC.~~

|-

| 0xF50 (page_end - 0xB0)

@@ Line 37: / Line 37: @@
 | u8[4]
 | Debug info (read by the SVC handler):
-: Bit0: reschedule.  Bit1: switch context. If non zero, and depending on <code>currentThread->shallTerminate</code>, send thread exit debug events after handling valid/authorized SVCs (except 0xFF). Cleared to zero after handling.
+: Bit0: reschedule.  Bit1: switch context. If non zero, and depending on <code>currentThread->shallTerminate</code>, send thread exit debug events after handling valid/authorized SVCs (except 0xFF). Cleared to zero after handling. Bit2: lock debug features
-: "Allow debug" flag from the process's exheader. If set, <code>{r0-r7, r12, lr}</code> will be pushed (they'll always be when handling invalid/unauthorized SVCs/SVC 0xFF).
+: "Allow debug" flag from the process's exheader. If set, <code>{r0-r7, r12, lr_svc}</code> will be pushed (they'll always be when handling invalid/unauthorized SVCs/SVC 0xFF). Needed for svcGetThreadContext and svcSetThreadContext to work properly in contexts other than exception handling (incl. hardware breakpoints). If lr_svc is set to one in this frame, the registers are reloaded from it (used with svcBreak, svc 0xff, etc).
 : ?
 : ID of the SVC being handled (reset to 0 when done).
-|-
-| 0xF4C (page_end - 0xB4)
-| u32
-| If non-zero, reloads <code>{r0-r7, r12, lr}</code> (otherwise skipped) from the stack after handling a SVC.
 |-
 | 0xF50 (page_end - 0xB0)