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Commit c905929a authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 

Pull ARM fixes from Russell King:
 "Just two fixes: wire up the new system calls added during the last
  merge window, and fix another user access site"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: alignment: fix alignment handling for uaccess changes
  ARM: wire up new syscalls
parents 685b5f1d 274e91b8

arch/arm/include/asm/unistd.h

+1 −1
Original line number Diff line number Diff line
@@ -19,7 +19,7 @@ 
 * This may need to be greater than __NR_last_syscall+1 in order to

 * account for the padding in the syscall table

 */

#define __NR_syscalls  (388)

#define __NR_syscalls  (392)



/*

 * *NOTE*: This is a ghost syscall private to the kernel.  Only the

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

+2 −0
Original line number Diff line number Diff line
@@ -414,6 +414,8 @@ 
#define __NR_memfd_create		(__NR_SYSCALL_BASE+385)

#define __NR_bpf			(__NR_SYSCALL_BASE+386)

#define __NR_execveat			(__NR_SYSCALL_BASE+387)

#define __NR_userfaultfd		(__NR_SYSCALL_BASE+388)

#define __NR_membarrier			(__NR_SYSCALL_BASE+389)



/*

 * The following SWIs are ARM private.

arch/arm/kernel/calls.S

+2 −0
Original line number Diff line number Diff line
@@ -397,6 +397,8 @@ 
/* 385 */	CALL(sys_memfd_create)

		CALL(sys_bpf)

		CALL(sys_execveat)

		CALL(sys_userfaultfd)

		CALL(sys_membarrier)

#ifndef syscalls_counted

.equ syscalls_padding, ((NR_syscalls + 3) & ~3) - NR_syscalls

#define syscalls_counted

arch/arm/mm/alignment.c

+25 −5
Original line number Diff line number Diff line
@@ -365,15 +365,21 @@ do_alignment_ldrhstrh(unsigned long addr, unsigned long instr, struct pt_regs *r 
 user:

	if (LDST_L_BIT(instr)) {

		unsigned long val;

		unsigned int __ua_flags = uaccess_save_and_enable();



		get16t_unaligned_check(val, addr);

		uaccess_restore(__ua_flags);



		/* signed half-word? */

		if (instr & 0x40)

			val = (signed long)((signed short) val);



		regs->uregs[rd] = val;

	} else

	} else {

		unsigned int __ua_flags = uaccess_save_and_enable();

		put16t_unaligned_check(regs->uregs[rd], addr);

		uaccess_restore(__ua_flags);

	}



	return TYPE_LDST;
@@ -420,14 +426,21 @@ do_alignment_ldrdstrd(unsigned long addr, unsigned long instr, 


 user:

	if (load) {

		unsigned long val;

		unsigned long val, val2;

		unsigned int __ua_flags = uaccess_save_and_enable();



		get32t_unaligned_check(val, addr);

		get32t_unaligned_check(val2, addr + 4);



		uaccess_restore(__ua_flags);



		regs->uregs[rd] = val;

		get32t_unaligned_check(val, addr + 4);

		regs->uregs[rd2] = val;

		regs->uregs[rd2] = val2;

	} else {

		unsigned int __ua_flags = uaccess_save_and_enable();

		put32t_unaligned_check(regs->uregs[rd], addr);

		put32t_unaligned_check(regs->uregs[rd2], addr + 4);

		uaccess_restore(__ua_flags);

	}



	return TYPE_LDST;
@@ -458,10 +471,15 @@ do_alignment_ldrstr(unsigned long addr, unsigned long instr, struct pt_regs *reg 
 trans:

	if (LDST_L_BIT(instr)) {

		unsigned int val;

		unsigned int __ua_flags = uaccess_save_and_enable();

		get32t_unaligned_check(val, addr);

		uaccess_restore(__ua_flags);

		regs->uregs[rd] = val;

	} else

	} else {

		unsigned int __ua_flags = uaccess_save_and_enable();

		put32t_unaligned_check(regs->uregs[rd], addr);

		uaccess_restore(__ua_flags);

	}

	return TYPE_LDST;



 fault:
@@ -531,6 +549,7 @@ do_alignment_ldmstm(unsigned long addr, unsigned long instr, struct pt_regs *reg 
#endif



	if (user_mode(regs)) {

		unsigned int __ua_flags = uaccess_save_and_enable();

		for (regbits = REGMASK_BITS(instr), rd = 0; regbits;

		     regbits >>= 1, rd += 1)

			if (regbits & 1) {
@@ -542,6 +561,7 @@ do_alignment_ldmstm(unsigned long addr, unsigned long instr, struct pt_regs *reg 
					put32t_unaligned_check(regs->uregs[rd], eaddr);

				eaddr += 4;

			}

		uaccess_restore(__ua_flags);

	} else {

		for (regbits = REGMASK_BITS(instr), rd = 0; regbits;

		     regbits >>= 1, rd += 1)