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https://gitlab.rtems.org/rtems/rtos/rtems.git
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Joel Sherrill
9b4422a251
Script does what is expected and tries to do it as smartly as possible. + remove occurrences of two blank comment lines next to each other after Id string line removed. + remove entire comment blocks which only exited to contain CVS Ids + If the processing left a blank line at the top of a file, it was removed.
36 lines
1.1 KiB
Plaintext
36 lines
1.1 KiB
Plaintext
--
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Overview of newlib support (newlib is from CYGNUS)
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Each task can have its own libc state including:
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open stdio files
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strtok
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multi precision arithmetic state
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etc.
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This is implemented by a reentrancy data structure for each task.
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When a task is "started" (in RTEMS sense) the reentrancy structure
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is allocated. Its address is stored in notepad[NOTEPAD_LAST].
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When task is switched to, the value of global variable _impure_ptr
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is changed to the value of the new tasks reentrancy structure.
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When a task is deleted
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atexit() processing (for that task) happens
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task's stdio buffers are flushed
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When exit(3) is called
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calling task's atexit processing done
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global libc state atexit processing done
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(this will include any atexit routines installed by drivers)
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executive is shutdown
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causes a context switch back to bsp land
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NOTE:
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libc extension are installed by bsp_libc_init()
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iff we are using clock interrupts.
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This hack is necessary to allow the tmtests to avoid
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timing the extensions.
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