3rd-party/linux-kernel-module-cheat
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avm svc: fully study and understand QEMU traces

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Preparation for timer. Timer is almost working it seems, just need to
ACK the interrupt most likely: it is firing like mad that's all.
This commit is contained in:
Ciro Santilli 六四事件 法轮功
2019-07-30 00:00:01 +00:00
parent 8f73910dd1
commit 3b93a2d65a
5 changed files with 166 additions and 38 deletions
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18
lkmc/aarch64.h
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@@ -65,6 +65,11 @@ main: \
main_after_prologue: \
;
/* Counter: https://github.com/cirosantilli/linux-kernel-module-cheat#arm-timer */
#define LKMC_CNTV_CTL_ENABLE (1 << 0)
#define LKMC_CNTV_CTL_IMASK (1 << 1)
#define LKMC_CNTV_CTL_ISTATUS (1 << 2)
/* LKMC_VECTOR_TABLE
*
* Adapted from: https://github.com/takeharukato/sample-tsk-sw/blob/ce7973aa5d46c9eedb58309de43df3b09d4f8d8d/hal/aarch64/vector.S
@@ -104,7 +109,8 @@ main_after_prologue: \
#define LKMC_VECTOR_SYMBOL_PREFIX lkmc_vector_
/* Push several registers on the stack to match LkmcVectorExceptionFrame. */
#define LKMC_VECTOR_BUILD_TRAPFRAME(exc_type) \
#define LKMC_VECTOR_BUILD_TRAPFRAME(exc_type, func_name) \
LKMC_GLOBAL(LKMC_CONCAT(LKMC_CONCAT(LKMC_VECTOR_SYMBOL_PREFIX, build_trapframe_), func_name)) \
stp x29, x30, [sp, -16]!; \
stp x27, x28, [sp, -16]!; \
stp x25, x26, [sp, -16]!; \
@@ -170,12 +176,12 @@ main_after_prologue: \
#define LKMC_VECTOR_ENTRY(func_name) \
.align 7; \
b LKMC_VECTOR_SYMBOL_PREFIX ## func_name
b LKMC_CONCAT(LKMC_CONCAT(LKMC_VECTOR_SYMBOL_PREFIX, entry_), func_name)
#define LKMC_VECTOR_FUNC(func_name, func_id) \
LKMC_VECTOR_FUNC_ALIGN; \
LKMC_VECTOR_SYMBOL_PREFIX ## func_name:; \
LKMC_VECTOR_BUILD_TRAPFRAME(func_id); \
LKMC_CONCAT(LKMC_CONCAT(LKMC_VECTOR_SYMBOL_PREFIX, entry_), func_name):; \
LKMC_VECTOR_BUILD_TRAPFRAME(func_id, func_name); \
LKMC_VECTOR_STORE_TRAPED_SP; \
LKMC_VECTOR_CALL_TRAP_HANDLER; \
LKMC_VECTOR_RESTORE_TRAPED_SP; \
@@ -183,8 +189,8 @@ LKMC_VECTOR_SYMBOL_PREFIX ## func_name:; \
#define LKMC_VECTOR_FUNC_NESTED(func_name, func_id) \
LKMC_VECTOR_FUNC_ALIGN; \
LKMC_VECTOR_SYMBOL_PREFIX ## func_name:; \
LKMC_VECTOR_BUILD_TRAPFRAME(func_id); \
LKMC_CONCAT(LKMC_CONCAT(LKMC_VECTOR_SYMBOL_PREFIX, entry_), func_name):; \
LKMC_VECTOR_BUILD_TRAPFRAME(func_id, func_name); \
LKMC_VECTOR_STORE_NESTED_SP; \
LKMC_VECTOR_CALL_TRAP_HANDLER; \
LKMC_VECTOR_RESTORE_TRAPFRAME