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asm-generic: asm/syscall.h cleanup

Browse source 
This is a single cleanup from Peter Collingbourne, removing
 some dead code.
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Merge tag 'asm-generic-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic cleanup from Arnd Bergmann:
 "This is a single cleanup from Peter Collingbourne, removing some dead
  code"

* tag 'asm-generic-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  arch: remove unused function syscall_set_arguments()
This commit is contained in:
Linus Torvalds 2021-11-10 11:22:03 -08:00
commit e8f023caee
18 changed files with 14 additions and 263 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
arch/arm/include/asm/syscall.h
View file

@ -77,16 +77,6 @@ static inline void syscall_get_arguments(struct task_struct *task,
memcpy(args, &regs->ARM_r0 + 1, 5 * sizeof(args[0])); memcpy(args, &regs->ARM_r0 + 1, 5 * sizeof(args[0]));
} }
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs,
const unsigned long *args)
{
regs->ARM_ORIG_r0 = args[0];
args++;
memcpy(&regs->ARM_r0 + 1, args, 5 * sizeof(args[0]));
}
static inline int syscall_get_arch(struct task_struct *task) static inline int syscall_get_arch(struct task_struct *task)
{ {
/* ARM tasks don't change audit architectures on the fly. */ /* ARM tasks don't change audit architectures on the fly. */

10
arch/arm64/include/asm/syscall.h
View file

@ -73,16 +73,6 @@ static inline void syscall_get_arguments(struct task_struct *task,
memcpy(args, &regs->regs[1], 5 * sizeof(args[0])); memcpy(args, &regs->regs[1], 5 * sizeof(args[0]));
} }
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs,
const unsigned long *args)
{
regs->orig_x0 = args[0];
args++;
memcpy(&regs->regs[1], args, 5 * sizeof(args[0]));
}
/* /*
* We don't care about endianness (__AUDIT_ARCH_LE bit) here because * We don't care about endianness (__AUDIT_ARCH_LE bit) here because
* AArch64 has the same system calls both on little- and big- endian. * AArch64 has the same system calls both on little- and big- endian.

9
arch/csky/include/asm/syscall.h
View file

@ -59,15 +59,6 @@ syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
memcpy(args, &regs->a1, 5 * sizeof(args[0])); memcpy(args, &regs->a1, 5 * sizeof(args[0]));
} }
static inline void
syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
const unsigned long *args)
{
regs->orig_a0 = args[0];
args++;
memcpy(&regs->a1, args, 5 * sizeof(regs->a1));
}
static inline int static inline int
syscall_get_arch(struct task_struct *task) syscall_get_arch(struct task_struct *task)
{ {

17
arch/ia64/include/asm/syscall.h
View file

@ -55,21 +55,8 @@ static inline void syscall_set_return_value(struct task_struct *task,
} }
} }
extern void ia64_syscall_get_set_arguments(struct task_struct *task, extern void syscall_get_arguments(struct task_struct *task,
struct pt_regs *regs, unsigned long *args, int rw); struct pt_regs *regs, unsigned long *args);
static inline void syscall_get_arguments(struct task_struct *task,
struct pt_regs *regs,
unsigned long *args)
{
ia64_syscall_get_set_arguments(task, regs, args, 0);
}
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs,
unsigned long *args)
{
ia64_syscall_get_set_arguments(task, regs, args, 1);
}
static inline int syscall_get_arch(struct task_struct *task) static inline int syscall_get_arch(struct task_struct *task)
{ {

31
arch/ia64/kernel/ptrace.c
View file

@ -2001,17 +2001,16 @@ const struct user_regset_view *task_user_regset_view(struct task_struct *tsk)
return &user_ia64_view; return &user_ia64_view;
} }
struct syscall_get_set_args { struct syscall_get_args {
unsigned int i; unsigned int i;
unsigned int n; unsigned int n;
unsigned long *args; unsigned long *args;
struct pt_regs *regs; struct pt_regs *regs;
int rw;
}; };
static void syscall_get_set_args_cb(struct unw_frame_info *info, void *data) static void syscall_get_args_cb(struct unw_frame_info *info, void *data)
{ {
struct syscall_get_set_args *args = data; struct syscall_get_args *args = data;
struct pt_regs *pt = args->regs; struct pt_regs *pt = args->regs;
unsigned long *krbs, cfm, ndirty, nlocals, nouts; unsigned long *krbs, cfm, ndirty, nlocals, nouts;
int i, count; int i, count;
@ -2042,37 +2041,31 @@ static void syscall_get_set_args_cb(struct unw_frame_info *info, void *data)
/* Iterate over outs. */ /* Iterate over outs. */
for (i = 0; i < count; i++) { for (i = 0; i < count; i++) {
int j = ndirty + nlocals + i + args->i; int j = ndirty + nlocals + i + args->i;
if (args->rw) args->args[i] = *ia64_rse_skip_regs(krbs, j);
*ia64_rse_skip_regs(krbs, j) = args->args[i];
else
args->args[i] = *ia64_rse_skip_regs(krbs, j);
} }
if (!args->rw) { while (i < args->n) {
while (i < args->n) { args->args[i] = 0;
args->args[i] = 0; i++;
i++;
}
} }
} }
void ia64_syscall_get_set_arguments(struct task_struct *task, void syscall_get_arguments(struct task_struct *task,
struct pt_regs *regs, unsigned long *args, int rw) struct pt_regs *regs, unsigned long *args)
{ {
struct syscall_get_set_args data = { struct syscall_get_args data = {
.i = 0, .i = 0,
.n = 6, .n = 6,
.args = args, .args = args,
.regs = regs, .regs = regs,
.rw = rw,
}; };
if (task == current) if (task == current)
unw_init_running(syscall_get_set_args_cb, &data); unw_init_running(syscall_get_args_cb, &data);
else { else {
struct unw_frame_info ufi; struct unw_frame_info ufi;
memset(&ufi, 0, sizeof(ufi)); memset(&ufi, 0, sizeof(ufi));
unw_init_from_blocked_task(&ufi, task); unw_init_from_blocked_task(&ufi, task);
syscall_get_set_args_cb(&ufi, &data); syscall_get_args_cb(&ufi, &data);
} }
} }

33
arch/microblaze/include/asm/syscall.h
View file

@ -58,28 +58,6 @@ static inline microblaze_reg_t microblaze_get_syscall_arg(struct pt_regs *regs,
return ~0; return ~0;
} }
static inline void microblaze_set_syscall_arg(struct pt_regs *regs,
unsigned int n,
unsigned long val)
{
switch (n) {
case 5:
regs->r10 = val;
case 4:
regs->r9 = val;
case 3:
regs->r8 = val;
case 2:
regs->r7 = val;
case 1:
regs->r6 = val;
case 0:
regs->r5 = val;
default:
BUG();
}
}
static inline void syscall_get_arguments(struct task_struct *task, static inline void syscall_get_arguments(struct task_struct *task,
struct pt_regs *regs, struct pt_regs *regs,
unsigned long *args) unsigned long *args)
@ -91,17 +69,6 @@ static inline void syscall_get_arguments(struct task_struct *task,
*args++ = microblaze_get_syscall_arg(regs, i++); *args++ = microblaze_get_syscall_arg(regs, i++);
} }
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs,
const unsigned long *args)
{
unsigned int i = 0;
unsigned int n = 6;
while (n--)
microblaze_set_syscall_arg(regs, i++, *args++);
}
asmlinkage unsigned long do_syscall_trace_enter(struct pt_regs *regs); asmlinkage unsigned long do_syscall_trace_enter(struct pt_regs *regs);
asmlinkage void do_syscall_trace_leave(struct pt_regs *regs); asmlinkage void do_syscall_trace_leave(struct pt_regs *regs);

22
arch/nds32/include/asm/syscall.h
View file

@ -132,28 +132,6 @@ syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
memcpy(args, &regs->uregs[0] + 1, 5 * sizeof(args[0])); memcpy(args, &regs->uregs[0] + 1, 5 * sizeof(args[0]));
} }
/**
* syscall_set_arguments - change system call parameter value
* @task: task of interest, must be in system call entry tracing
* @regs: task_pt_regs() of @task
* @args: array of argument values to store
*
* Changes 6 arguments to the system call. The first argument gets value
* @args[0], and so on.
*
* It's only valid to call this when @task is stopped for tracing on
* entry to a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT.
*/
static inline void
syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
const unsigned long *args)
{
regs->orig_r0 = args[0];
args++;
memcpy(&regs->uregs[0] + 1, args, 5 * sizeof(args[0]));
}
static inline int static inline int
syscall_get_arch(struct task_struct *task) syscall_get_arch(struct task_struct *task)
{ {

11
arch/nios2/include/asm/syscall.h
View file

@ -58,17 +58,6 @@ static inline void syscall_get_arguments(struct task_struct *task,
*args = regs->r9; *args = regs->r9;
} }
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs, const unsigned long *args)
{
regs->r4 = *args++;
regs->r5 = *args++;
regs->r6 = *args++;
regs->r7 = *args++;
regs->r8 = *args++;
regs->r9 = *args;
}
static inline int syscall_get_arch(struct task_struct *task) static inline int syscall_get_arch(struct task_struct *task)
{ {
return AUDIT_ARCH_NIOS2; return AUDIT_ARCH_NIOS2;

7
arch/openrisc/include/asm/syscall.h
View file

@ -57,13 +57,6 @@ syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
memcpy(args, &regs->gpr[3], 6 * sizeof(args[0])); memcpy(args, &regs->gpr[3], 6 * sizeof(args[0]));
} }
static inline void
syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
const unsigned long *args)
{
memcpy(&regs->gpr[3], args, 6 * sizeof(args[0]));
}
static inline int syscall_get_arch(struct task_struct *task) static inline int syscall_get_arch(struct task_struct *task)
{ {
return AUDIT_ARCH_OPENRISC; return AUDIT_ARCH_OPENRISC;

10
arch/powerpc/include/asm/syscall.h
View file

@ -103,16 +103,6 @@ static inline void syscall_get_arguments(struct task_struct *task,
} }
} }
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs,
const unsigned long *args)
{
memcpy(&regs->gpr[3], args, 6 * sizeof(args[0]));
/* Also copy the first argument into orig_gpr3 */
regs->orig_gpr3 = args[0];
}
static inline int syscall_get_arch(struct task_struct *task) static inline int syscall_get_arch(struct task_struct *task)
{ {
if (is_32bit_task()) if (is_32bit_task())

9
arch/riscv/include/asm/syscall.h
View file

@ -64,15 +64,6 @@ static inline void syscall_get_arguments(struct task_struct *task,
memcpy(args, &regs->a1, 5 * sizeof(args[0])); memcpy(args, &regs->a1, 5 * sizeof(args[0]));
} }
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs,
const unsigned long *args)
{
regs->orig_a0 = args[0];
args++;
memcpy(&regs->a1, args, 5 * sizeof(regs->a1));
}
static inline int syscall_get_arch(struct task_struct *task) static inline int syscall_get_arch(struct task_struct *task)
{ {
#ifdef CONFIG_64BIT #ifdef CONFIG_64BIT

12
arch/s390/include/asm/syscall.h
View file

@ -78,18 +78,6 @@ static inline void syscall_get_arguments(struct task_struct *task,
args[0] = regs->orig_gpr2 & mask; args[0] = regs->orig_gpr2 & mask;
} }
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs,
const unsigned long *args)
{
unsigned int n = 6;
while (n-- > 0)
if (n > 0)
regs->gprs[2 + n] = args[n];
regs->orig_gpr2 = args[0];
}
static inline int syscall_get_arch(struct task_struct *task) static inline int syscall_get_arch(struct task_struct *task)
{ {
#ifdef CONFIG_COMPAT #ifdef CONFIG_COMPAT

12
arch/sh/include/asm/syscall_32.h
View file

@ -57,18 +57,6 @@ static inline void syscall_get_arguments(struct task_struct *task,
args[0] = regs->regs[4]; args[0] = regs->regs[4];
} }
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs,
const unsigned long *args)
{
regs->regs[1] = args[5];
regs->regs[0] = args[4];
regs->regs[7] = args[3];
regs->regs[6] = args[2];
regs->regs[5] = args[1];
regs->regs[4] = args[0];
}
static inline int syscall_get_arch(struct task_struct *task) static inline int syscall_get_arch(struct task_struct *task)
{ {
int arch = AUDIT_ARCH_SH; int arch = AUDIT_ARCH_SH;

10
arch/sparc/include/asm/syscall.h
View file

@ -117,16 +117,6 @@ static inline void syscall_get_arguments(struct task_struct *task,
} }
} }
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs,
const unsigned long *args)
{
unsigned int i;
for (i = 0; i < 6; i++)
regs->u_regs[UREG_I0 + i] = args[i];
}
static inline int syscall_get_arch(struct task_struct *task) static inline int syscall_get_arch(struct task_struct *task)
{ {
#if defined(CONFIG_SPARC64) && defined(CONFIG_COMPAT) #if defined(CONFIG_SPARC64) && defined(CONFIG_COMPAT)

14
arch/um/include/asm/syscall-generic.h
View file

@ -62,20 +62,6 @@ static inline void syscall_get_arguments(struct task_struct *task,
*args = UPT_SYSCALL_ARG6(r); *args = UPT_SYSCALL_ARG6(r);
} }
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs,
const unsigned long *args)
{
struct uml_pt_regs *r = &regs->regs;
UPT_SYSCALL_ARG1(r) = *args++;
UPT_SYSCALL_ARG2(r) = *args++;
UPT_SYSCALL_ARG3(r) = *args++;
UPT_SYSCALL_ARG4(r) = *args++;
UPT_SYSCALL_ARG5(r) = *args++;
UPT_SYSCALL_ARG6(r) = *args;
}
/* See arch/x86/um/asm/syscall.h for syscall_get_arch() definition. */ /* See arch/x86/um/asm/syscall.h for syscall_get_arch() definition. */
#endif /* __UM_SYSCALL_GENERIC_H */ #endif /* __UM_SYSCALL_GENERIC_H */

33
arch/x86/include/asm/syscall.h
View file

@ -87,15 +87,6 @@ static inline void syscall_get_arguments(struct task_struct *task,
memcpy(args, &regs->bx, 6 * sizeof(args[0])); memcpy(args, &regs->bx, 6 * sizeof(args[0]));
} }
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs,
unsigned int i, unsigned int n,
const unsigned long *args)
{
BUG_ON(i + n > 6);
memcpy(&regs->bx + i, args, n * sizeof(args[0]));
}
static inline int syscall_get_arch(struct task_struct *task) static inline int syscall_get_arch(struct task_struct *task)
{ {
return AUDIT_ARCH_I386; return AUDIT_ARCH_I386;
@ -127,30 +118,6 @@ static inline void syscall_get_arguments(struct task_struct *task,
} }
} }
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs,
const unsigned long *args)
{
# ifdef CONFIG_IA32_EMULATION
if (task->thread_info.status & TS_COMPAT) {
regs->bx = *args++;
regs->cx = *args++;
regs->dx = *args++;
regs->si = *args++;
regs->di = *args++;
regs->bp = *args;
} else
# endif
{
regs->di = *args++;
regs->si = *args++;
regs->dx = *args++;
regs->r10 = *args++;
regs->r8 = *args++;
regs->r9 = *args;
}
}
static inline int syscall_get_arch(struct task_struct *task) static inline int syscall_get_arch(struct task_struct *task)
{ {
/* x32 tasks should be considered AUDIT_ARCH_X86_64. */ /* x32 tasks should be considered AUDIT_ARCH_X86_64. */

11
arch/xtensa/include/asm/syscall.h
View file

@ -68,17 +68,6 @@ static inline void syscall_get_arguments(struct task_struct *task,
args[i] = regs->areg[reg[i]]; args[i] = regs->areg[reg[i]];
} }
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs,
const unsigned long *args)
{
static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
unsigned int i;
for (i = 0; i < 6; ++i)
regs->areg[reg[i]] = args[i];
}
asmlinkage long xtensa_rt_sigreturn(void); asmlinkage long xtensa_rt_sigreturn(void);
asmlinkage long xtensa_shmat(int, char __user *, int); asmlinkage long xtensa_shmat(int, char __user *, int);
asmlinkage long xtensa_fadvise64_64(int, int, asmlinkage long xtensa_fadvise64_64(int, int,

16
include/asm-generic/syscall.h
View file

@ -117,22 +117,6 @@ void syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
void syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, void syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
unsigned long *args); unsigned long *args);
/**
* syscall_set_arguments - change system call parameter value
* @task: task of interest, must be in system call entry tracing
* @regs: task_pt_regs() of @task
* @args: array of argument values to store
*
* Changes 6 arguments to the system call.
* The first argument gets value @args[0], and so on.
*
* It's only valid to call this when @task is stopped for tracing on
* entry to a system call, due to %SYSCALL_WORK_SYSCALL_TRACE or
* %SYSCALL_WORK_SYSCALL_AUDIT.
*/
void syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
const unsigned long *args);
/** /**
* syscall_get_arch - return the AUDIT_ARCH for the current system call * syscall_get_arch - return the AUDIT_ARCH for the current system call
* @task: task of interest, must be blocked * @task: task of interest, must be blocked