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debug messages: implement dynamic debug

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Heavily inspired off linux kernel's dynamic debug:
 * add a /sys/kernel/debug/dynamic_debug/control file
 (accessible from linux side in /sys/class/mcos/mcos0/sys/kernel/debug/dynamic_debug/control)
 * read from file to list debug statements (currently limited to 4k in size)
 * write to file with '[file foo ][func bar ][line [x][-[y]]] [+-]p' to change values

Side effects:
 * reindented all linker scripts, there is a new __verbose section
 * added string function strpbrk

Change-Id: I36d7707274dcc3ecaf200075a31a2f0f76021059
This commit is contained in:
Dominique Martinet
2018-05-24 18:17:45 +09:00
parent bc887aab44
commit 3185334c1c
48 changed files with 407 additions and 232 deletions
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8
arch/arm64/kernel/syscall.c
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@@ -14,6 +14,7 @@
#include <prctl.h>
#include <limits.h>
#include <syscall.h>
#include <debug.h>
extern void ptrace_report_signal(struct thread *thread, int sig);
extern void clear_single_step(struct thread *thread);
@@ -27,11 +28,8 @@ static void __check_signal(unsigned long rc, void *regs, int num, int irq_disabl
//#define DEBUG_PRINT_SC
#ifdef DEBUG_PRINT_SC
#define dkprintf kprintf
#define ekprintf(...) do { if (0) kprintf(__VA_ARGS__); } while (0)
#else
#define dkprintf(...) do { if (0) kprintf(__VA_ARGS__); } while (0)
#define ekprintf(...) do { if (0) kprintf(__VA_ARGS__); } while (0)
#undef DDEBUG_DEFAULT
#define DDEBUG_DEFAULT DDEBUG_PRINT
#endif
#define NOT_IMPLEMENTED() do { kprintf("%s is not implemented\n", __func__); while(1);} while(0)