Commit 00c2ca84 authored by Tiezhu Yang's avatar Tiezhu Yang Committed by Huacai Chen
Browse files

LoongArch: Use SYM_CODE_* to annotate exception handlers 



As described in include/linux/linkage.h,

  FUNC -- C-like functions (proper stack frame etc.)
  CODE -- non-C code (e.g. irq handlers with different, special stack etc.)

  SYM_FUNC_{START, END} -- use for global functions
  SYM_CODE_{START, END} -- use for non-C (special) functions

So use SYM_CODE_* to annotate exception handlers.

Signed-off-by: default avatarTiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 58720809

arch/loongarch/include/asm/linkage.h

+8 −0
Original line number Diff line number Diff line
@@ -33,4 +33,12 @@ 
	.cfi_endproc;					\

	SYM_END(name, SYM_T_FUNC)



#define SYM_CODE_START(name)				\

	SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)	\

	.cfi_startproc;



#define SYM_CODE_END(name)				\

	.cfi_endproc;					\

	SYM_END(name, SYM_T_NONE)



#endif

arch/loongarch/kernel/entry.S

+2 −2
Original line number Diff line number Diff line
@@ -18,7 +18,7 @@ 
	.text

	.cfi_sections	.debug_frame

	.align	5

SYM_FUNC_START(handle_syscall)

SYM_CODE_START(handle_syscall)

	csrrd		t0, PERCPU_BASE_KS

	la.pcrel	t1, kernelsp

	add.d		t1, t1, t0
@@ -71,7 +71,7 @@ SYM_FUNC_START(handle_syscall) 
	bl		do_syscall



	RESTORE_ALL_AND_RET

SYM_FUNC_END(handle_syscall)

SYM_CODE_END(handle_syscall)

_ASM_NOKPROBE(handle_syscall)



SYM_CODE_START(ret_from_fork)

arch/loongarch/kernel/genex.S

+8 −8
Original line number Diff line number Diff line
@@ -31,7 +31,7 @@ SYM_FUNC_START(__arch_cpu_idle) 
1:	jr	ra

SYM_FUNC_END(__arch_cpu_idle)



SYM_FUNC_START(handle_vint)

SYM_CODE_START(handle_vint)

	BACKUP_T0T1

	SAVE_ALL

	la_abs	t1, __arch_cpu_idle
@@ -46,11 +46,11 @@ SYM_FUNC_START(handle_vint) 
	la_abs	t0, do_vint

	jirl	ra, t0, 0

	RESTORE_ALL_AND_RET

SYM_FUNC_END(handle_vint)

SYM_CODE_END(handle_vint)



SYM_FUNC_START(except_vec_cex)

SYM_CODE_START(except_vec_cex)

	b	cache_parity_error

SYM_FUNC_END(except_vec_cex)

SYM_CODE_END(except_vec_cex)



	.macro	build_prep_badv

	csrrd	t0, LOONGARCH_CSR_BADV
@@ -66,7 +66,7 @@ SYM_FUNC_END(except_vec_cex) 


	.macro	BUILD_HANDLER exception handler prep

	.align	5

	SYM_FUNC_START(handle_\exception)

	SYM_CODE_START(handle_\exception)

	666:

	BACKUP_T0T1

	SAVE_ALL
@@ -76,7 +76,7 @@ SYM_FUNC_END(except_vec_cex) 
	jirl	ra, t0, 0

	668:

	RESTORE_ALL_AND_RET

	SYM_FUNC_END(handle_\exception)

	SYM_CODE_END(handle_\exception)

	SYM_DATA(unwind_hint_\exception, .word 668b - 666b)

	.endm
@@ -93,7 +93,7 @@ SYM_FUNC_END(except_vec_cex) 
	BUILD_HANDLER watch watch none

	BUILD_HANDLER reserved reserved none	/* others */



SYM_FUNC_START(handle_sys)

SYM_CODE_START(handle_sys)

	la_abs	t0, handle_syscall

	jr	t0

SYM_FUNC_END(handle_sys)
 
SYM_CODE_END(handle_sys)

arch/loongarch/mm/tlbex.S

+18 −18
Original line number Diff line number Diff line
@@ -17,7 +17,7 @@ 
#define PTRS_PER_PTE_BITS	(PAGE_SHIFT - 3)



	.macro tlb_do_page_fault, write

	SYM_FUNC_START(tlb_do_page_fault_\write)

	SYM_CODE_START(tlb_do_page_fault_\write)

	SAVE_ALL

	csrrd		a2, LOONGARCH_CSR_BADV

	move		a0, sp
@@ -25,13 +25,13 @@ 
	li.w		a1, \write

	bl		do_page_fault

	RESTORE_ALL_AND_RET

	SYM_FUNC_END(tlb_do_page_fault_\write)

	SYM_CODE_END(tlb_do_page_fault_\write)

	.endm



	tlb_do_page_fault 0

	tlb_do_page_fault 1



SYM_FUNC_START(handle_tlb_protect)

SYM_CODE_START(handle_tlb_protect)

	BACKUP_T0T1

	SAVE_ALL

	move		a0, sp
@@ -41,9 +41,9 @@ SYM_FUNC_START(handle_tlb_protect) 
	la_abs		t0, do_page_fault

	jirl		ra, t0, 0

	RESTORE_ALL_AND_RET

SYM_FUNC_END(handle_tlb_protect)

SYM_CODE_END(handle_tlb_protect)



SYM_FUNC_START(handle_tlb_load)

SYM_CODE_START(handle_tlb_load)

	csrwr		t0, EXCEPTION_KS0

	csrwr		t1, EXCEPTION_KS1

	csrwr		ra, EXCEPTION_KS2
@@ -187,16 +187,16 @@ nopage_tlb_load: 
	csrrd		ra, EXCEPTION_KS2

	la_abs		t0, tlb_do_page_fault_0

	jr		t0

SYM_FUNC_END(handle_tlb_load)

SYM_CODE_END(handle_tlb_load)



SYM_FUNC_START(handle_tlb_load_ptw)

SYM_CODE_START(handle_tlb_load_ptw)

	csrwr		t0, LOONGARCH_CSR_KS0

	csrwr		t1, LOONGARCH_CSR_KS1

	la_abs		t0, tlb_do_page_fault_0

	jr		t0

SYM_FUNC_END(handle_tlb_load_ptw)

SYM_CODE_END(handle_tlb_load_ptw)



SYM_FUNC_START(handle_tlb_store)

SYM_CODE_START(handle_tlb_store)

	csrwr		t0, EXCEPTION_KS0

	csrwr		t1, EXCEPTION_KS1

	csrwr		ra, EXCEPTION_KS2
@@ -343,16 +343,16 @@ nopage_tlb_store: 
	csrrd		ra, EXCEPTION_KS2

	la_abs		t0, tlb_do_page_fault_1

	jr		t0

SYM_FUNC_END(handle_tlb_store)

SYM_CODE_END(handle_tlb_store)



SYM_FUNC_START(handle_tlb_store_ptw)

SYM_CODE_START(handle_tlb_store_ptw)

	csrwr		t0, LOONGARCH_CSR_KS0

	csrwr		t1, LOONGARCH_CSR_KS1

	la_abs		t0, tlb_do_page_fault_1

	jr		t0

SYM_FUNC_END(handle_tlb_store_ptw)

SYM_CODE_END(handle_tlb_store_ptw)



SYM_FUNC_START(handle_tlb_modify)

SYM_CODE_START(handle_tlb_modify)

	csrwr		t0, EXCEPTION_KS0

	csrwr		t1, EXCEPTION_KS1

	csrwr		ra, EXCEPTION_KS2
@@ -497,16 +497,16 @@ nopage_tlb_modify: 
	csrrd		ra, EXCEPTION_KS2

	la_abs		t0, tlb_do_page_fault_1

	jr		t0

SYM_FUNC_END(handle_tlb_modify)

SYM_CODE_END(handle_tlb_modify)



SYM_FUNC_START(handle_tlb_modify_ptw)

SYM_CODE_START(handle_tlb_modify_ptw)

	csrwr		t0, LOONGARCH_CSR_KS0

	csrwr		t1, LOONGARCH_CSR_KS1

	la_abs		t0, tlb_do_page_fault_1

	jr		t0

SYM_FUNC_END(handle_tlb_modify_ptw)

SYM_CODE_END(handle_tlb_modify_ptw)



SYM_FUNC_START(handle_tlb_refill)

SYM_CODE_START(handle_tlb_refill)

	csrwr		t0, LOONGARCH_CSR_TLBRSAVE

	csrrd		t0, LOONGARCH_CSR_PGD

	lddir		t0, t0, 3
@@ -521,4 +521,4 @@ SYM_FUNC_START(handle_tlb_refill) 
	tlbfill

	csrrd		t0, LOONGARCH_CSR_TLBRSAVE

	ertn

SYM_FUNC_END(handle_tlb_refill)
 
SYM_CODE_END(handle_tlb_refill)