Commit 14338e63 authored by Huacai Chen's avatar Huacai Chen
Browse files

LoongArch: Adjust system call for 32BIT/64BIT 



Adjust system call for both 32BIT and 64BIT, including: add the uapi
unistd_{32,64}.h and syscall_table_{32,64}.h inclusion, add sys_mmap2()
definition, change the system call entry routines, etc.

Reviewed-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarJiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 3f63ac8d

arch/loongarch/include/asm/Kbuild

+1 −0
Original line number Diff line number Diff line 
# SPDX-License-Identifier: GPL-2.0

syscall-y += syscall_table_32.h

syscall-y += syscall_table_64.h

generated-y += orc_hash.h

arch/loongarch/include/uapi/asm/Kbuild

+1 −0
Original line number Diff line number Diff line 
# SPDX-License-Identifier: GPL-2.0

syscall-y += unistd_32.h

syscall-y += unistd_64.h

arch/loongarch/include/uapi/asm/unistd.h

+6 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */



#include <asm/bitsperlong.h>



#if __BITS_PER_LONG == 32

#include <asm/unistd_32.h>

#else

#include <asm/unistd_64.h>

#endif

arch/loongarch/kernel/Makefile.syscalls

+1 −0
Original line number Diff line number Diff line 
# SPDX-License-Identifier: GPL-2.0



# No special ABIs on loongarch so far

syscall_abis_32 +=

syscall_abis_64 +=

arch/loongarch/kernel/entry.S

+11 −11
Original line number Diff line number Diff line
@@ -23,24 +23,24 @@ SYM_CODE_START(handle_syscall) 
	UNWIND_HINT_UNDEFINED

	csrrd		t0, PERCPU_BASE_KS

	la.pcrel	t1, kernelsp

	add.d		t1, t1, t0

	PTR_ADD		t1, t1, t0

	move		t2, sp

	ld.d		sp, t1, 0

	PTR_L		sp, t1, 0



	addi.d		sp, sp, -PT_SIZE

	PTR_ADDI	sp, sp, -PT_SIZE

	cfi_st		t2, PT_R3

	cfi_rel_offset	sp, PT_R3

	st.d		zero, sp, PT_R0

	LONG_S		zero, sp, PT_R0

	csrrd		t2, LOONGARCH_CSR_PRMD

	st.d		t2, sp, PT_PRMD

	LONG_S		t2, sp, PT_PRMD

	csrrd		t2, LOONGARCH_CSR_CRMD

	st.d		t2, sp, PT_CRMD

	LONG_S		t2, sp, PT_CRMD

	csrrd		t2, LOONGARCH_CSR_EUEN

	st.d		t2, sp, PT_EUEN

	LONG_S		t2, sp, PT_EUEN

	csrrd		t2, LOONGARCH_CSR_ECFG

	st.d		t2, sp, PT_ECFG

	LONG_S		t2, sp, PT_ECFG

	csrrd		t2, LOONGARCH_CSR_ESTAT

	st.d		t2, sp, PT_ESTAT

	LONG_S		t2, sp, PT_ESTAT

	cfi_st		ra, PT_R1

	cfi_st		a0, PT_R4

	cfi_st		a1, PT_R5
@@ -51,7 +51,7 @@ SYM_CODE_START(handle_syscall) 
	cfi_st		a6, PT_R10

	cfi_st		a7, PT_R11

	csrrd		ra, LOONGARCH_CSR_ERA

	st.d		ra, sp, PT_ERA

	LONG_S		ra, sp, PT_ERA

	cfi_rel_offset	ra, PT_ERA



	cfi_st		tp, PT_R2
@@ -67,7 +67,7 @@ SYM_CODE_START(handle_syscall) 
#endif



	move		u0, t0

	li.d		tp, ~_THREAD_MASK

	LONG_LI		tp, ~_THREAD_MASK

	and		tp, tp, sp



	move		a0, sp