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linux/arch/sparc/include/asm/ptrace.h

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sparc: unify ptrace.h The two ptrace.h implementations are very alike but the small differences required two set of ifdef/else/endif pairs. The definition of reg_window32 could have been shared but that would have required several updates in sparc32 code as all printk formatting for example assume it is longs. sparc_stackf looked like anohter candidate to share if the 32 bit was renamed to sparc_stackf32. But it contains two pointers in the sparc32 version which would have been 64 bit in the sparc64 version so it was non-trivial. Using a set of accessor macros could do the trick if pursued later. The sparc64 specific definitions are not protected by ifdef - as it should not be required to do so. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 19:42:12 -08:00
#ifndef __SPARC_PTRACE_H
#define __SPARC_PTRACE_H
UAPI: (Scripted) Disintegrate arch/sparc/include/asm Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Michael Kerrisk <mtk.manpages@gmail.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dave Jones <davej@redhat.com>
2012-10-09 09:47:43 +01:00
#include <uapi/asm/ptrace.h>
sparc: unify ptrace.h The two ptrace.h implementations are very alike but the small differences required two set of ifdef/else/endif pairs. The definition of reg_window32 could have been shared but that would have required several updates in sparc32 code as all printk formatting for example assume it is longs. sparc_stackf looked like anohter candidate to share if the 32 bit was renamed to sparc_stackf32. But it contains two pointers in the sparc32 version which would have been 64 bit in the sparc64 version so it was non-trivial. Using a set of accessor macros could do the trick if pursued later. The sparc64 specific definitions are not protected by ifdef - as it should not be required to do so. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 19:42:12 -08:00
#if defined(__sparc__) && defined(__arch64__)
#ifndef __ASSEMBLY__
#include <linux/threads.h>
sparc: fix fallout from system.h split Fixes this build error: kernel/signal.c: In function 'ptrace_stop': kernel/signal.c:1860:3: error: implicit declaration of function 'synchronize_user_stack' [-Werror=implicit-function-declaration] Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-29 22:39:57 -07:00
#include <asm/switch_to.h>
sparc: unify ptrace.h The two ptrace.h implementations are very alike but the small differences required two set of ifdef/else/endif pairs. The definition of reg_window32 could have been shared but that would have required several updates in sparc32 code as all printk formatting for example assume it is longs. sparc_stackf looked like anohter candidate to share if the 32 bit was renamed to sparc_stackf32. But it contains two pointers in the sparc32 version which would have been 64 bit in the sparc64 version so it was non-trivial. Using a set of accessor macros could do the trick if pursued later. The sparc64 specific definitions are not protected by ifdef - as it should not be required to do so. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 19:42:12 -08:00
static inline int pt_regs_trap_type(struct pt_regs *regs)
{
return regs->magic & 0x1ff;
}
static inline bool pt_regs_is_syscall(struct pt_regs *regs)
{
return (regs->tstate & TSTATE_SYSCALL);
}
static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
{
return (regs->tstate &= ~TSTATE_SYSCALL);
}
#define arch_ptrace_stop_needed(exit_code, info) \
({ flush_user_windows(); \
get_thread_wsaved() != 0; \
})
#define arch_ptrace_stop(exit_code, info) \
synchronize_user_stack()
sparc64: switch to generic kernel_thread() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-05 22:37:01 -04:00
#define current_pt_regs() \
((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
sparc: unify ptrace.h The two ptrace.h implementations are very alike but the small differences required two set of ifdef/else/endif pairs. The definition of reg_window32 could have been shared but that would have required several updates in sparc32 code as all printk formatting for example assume it is longs. sparc_stackf looked like anohter candidate to share if the 32 bit was renamed to sparc_stackf32. But it contains two pointers in the sparc32 version which would have been 64 bit in the sparc64 version so it was non-trivial. Using a set of accessor macros could do the trick if pursued later. The sparc64 specific definitions are not protected by ifdef - as it should not be required to do so. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 19:42:12 -08:00
struct global_reg_snapshot {
unsigned long tstate;
unsigned long tpc;
unsigned long tnpc;
unsigned long o7;
unsigned long i7;
unsigned long rpc;
struct thread_info *thread;
unsigned long pad1;
};
sparc64: Add global PMU register dumping via sysrq. Signed-off-by: David S. Miller <davem@davemloft.net>
2012-10-16 09:34:01 -07:00
struct global_pmu_snapshot {
unsigned long pcr[4];
unsigned long pic[4];
};
union global_cpu_snapshot {
struct global_reg_snapshot reg;
struct global_pmu_snapshot pmu;
};
extern union global_cpu_snapshot global_cpu_snapshot[NR_CPUS];
sparc: unify ptrace.h The two ptrace.h implementations are very alike but the small differences required two set of ifdef/else/endif pairs. The definition of reg_window32 could have been shared but that would have required several updates in sparc32 code as all printk formatting for example assume it is longs. sparc_stackf looked like anohter candidate to share if the 32 bit was renamed to sparc_stackf32. But it contains two pointers in the sparc32 version which would have been 64 bit in the sparc64 version so it was non-trivial. Using a set of accessor macros could do the trick if pursued later. The sparc64 specific definitions are not protected by ifdef - as it should not be required to do so. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 19:42:12 -08:00
sparc64: clear syscall_noerror on the entry to syscall, not on the exit Move that sucker to just before TI_FPDEPTH and replace stb with sth in etrap_save(). Take current_ds to its old place, so that we don't push wsaved into TI_... flags. That allows to lose clearing syscall_noerror on return from syscall. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26 01:21:14 -04:00
#define force_successful_syscall_return() set_thread_noerror(1)
sparc: unify ptrace.h The two ptrace.h implementations are very alike but the small differences required two set of ifdef/else/endif pairs. The definition of reg_window32 could have been shared but that would have required several updates in sparc32 code as all printk formatting for example assume it is longs. sparc_stackf looked like anohter candidate to share if the 32 bit was renamed to sparc_stackf32. But it contains two pointers in the sparc32 version which would have been 64 bit in the sparc64 version so it was non-trivial. Using a set of accessor macros could do the trick if pursued later. The sparc64 specific definitions are not protected by ifdef - as it should not be required to do so. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 19:42:12 -08:00
#define user_mode(regs) (!((regs)->tstate & TSTATE_PRIV))
#define instruction_pointer(regs) ((regs)->tpc)
sparc64:Support User Probes for sparc Signed-off-by: Eric Saint Etienne <eric.saint.etienne@oracle.com> Signed-off-by: Allen Pais <allen.pais@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-13 10:06:13 +05:30
#define instruction_pointer_set(regs, val) do { \
(regs)->tpc = (val); \
(regs)->tnpc = (val)+4; \
} while (0)
sparc: unify ptrace.h The two ptrace.h implementations are very alike but the small differences required two set of ifdef/else/endif pairs. The definition of reg_window32 could have been shared but that would have required several updates in sparc32 code as all printk formatting for example assume it is longs. sparc_stackf looked like anohter candidate to share if the 32 bit was renamed to sparc_stackf32. But it contains two pointers in the sparc32 version which would have been 64 bit in the sparc64 version so it was non-trivial. Using a set of accessor macros could do the trick if pursued later. The sparc64 specific definitions are not protected by ifdef - as it should not be required to do so. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 19:42:12 -08:00
#define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
Audit: push audit success and retcode into arch ptrace.h The audit system previously expected arches calling to audit_syscall_exit to supply as arguments if the syscall was a success and what the return code was. Audit also provides a helper AUDITSC_RESULT which was supposed to simplify things by converting from negative retcodes to an audit internal magic value stating success or failure. This helper was wrong and could indicate that a valid pointer returned to userspace was a failed syscall. The fix is to fix the layering foolishness. We now pass audit_syscall_exit a struct pt_reg and it in turns calls back into arch code to collect the return value and to determine if the syscall was a success or failure. We also define a generic is_syscall_success() macro which determines success/failure based on if the value is < -MAX_ERRNO. This works for arches like x86 which do not use a separate mechanism to indicate syscall failure. We make both the is_syscall_success() and regs_return_value() static inlines instead of macros. The reason is because the audit function must take a void* for the regs. (uml calls theirs struct uml_pt_regs instead of just struct pt_regs so audit_syscall_exit can't take a struct pt_regs). Since the audit function takes a void* we need to use static inlines to cast it back to the arch correct structure to dereference it. The other major change is that on some arches, like ia64, MIPS and ppc, we change regs_return_value() to give us the negative value on syscall failure. THE only other user of this macro, kretprobe_example.c, won't notice and it makes the value signed consistently for the audit functions across all archs. In arch/sh/kernel/ptrace_64.c I see that we were using regs[9] in the old audit code as the return value. But the ptrace_64.h code defined the macro regs_return_value() as regs[3]. I have no idea which one is correct, but this patch now uses the regs_return_value() function, so it now uses regs[3]. For powerpc we previously used regs->result but now use the regs_return_value() function which uses regs->gprs[3]. regs->gprs[3] is always positive so the regs_return_value(), much like ia64 makes it negative before calling the audit code when appropriate. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: H. Peter Anvin <hpa@zytor.com> [for x86 portion] Acked-by: Tony Luck <tony.luck@intel.com> [for ia64] Acked-by: Richard Weinberger <richard@nod.at> [for uml] Acked-by: David S. Miller <davem@davemloft.net> [for sparc] Acked-by: Ralf Baechle <ralf@linux-mips.org> [for mips] Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [for ppc]
2012-01-03 14:23:06 -05:00
static inline int is_syscall_success(struct pt_regs *regs)
{
return !(regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY));
}
static inline long regs_return_value(struct pt_regs *regs)
{
return regs->u_regs[UREG_I0];
}
sparc: unify ptrace.h The two ptrace.h implementations are very alike but the small differences required two set of ifdef/else/endif pairs. The definition of reg_window32 could have been shared but that would have required several updates in sparc32 code as all printk formatting for example assume it is longs. sparc_stackf looked like anohter candidate to share if the 32 bit was renamed to sparc_stackf32. But it contains two pointers in the sparc32 version which would have been 64 bit in the sparc64 version so it was non-trivial. Using a set of accessor macros could do the trick if pursued later. The sparc64 specific definitions are not protected by ifdef - as it should not be required to do so. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 19:42:12 -08:00
#ifdef CONFIG_SMP
sparc: drop use of extern for prototypes in arch/sparc/include/asm Drop extern for all prototypes and adjust alignment of parameters as required after the removal. In a few rare cases adjust linelength to conform to maximum 80 chars, and likewise in a few rare cases adjust alignment of parameters to static functions. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-16 23:25:50 +02:00
unsigned long profile_pc(struct pt_regs *);
sparc: unify ptrace.h The two ptrace.h implementations are very alike but the small differences required two set of ifdef/else/endif pairs. The definition of reg_window32 could have been shared but that would have required several updates in sparc32 code as all printk formatting for example assume it is longs. sparc_stackf looked like anohter candidate to share if the 32 bit was renamed to sparc_stackf32. But it contains two pointers in the sparc32 version which would have been 64 bit in the sparc64 version so it was non-trivial. Using a set of accessor macros could do the trick if pursued later. The sparc64 specific definitions are not protected by ifdef - as it should not be required to do so. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 19:42:12 -08:00
#else
#define profile_pc(regs) instruction_pointer(regs)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
#endif
sparc64:Support User Probes for sparc Signed-off-by: Eric Saint Etienne <eric.saint.etienne@oracle.com> Signed-off-by: Allen Pais <allen.pais@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-13 10:06:13 +05:30
#define MAX_REG_OFFSET (offsetof(struct pt_regs, magic))
sparc64: Fill in rest of HAVE_REGS_AND_STACK_ACCESS_API This lets us enable KPROBE_EVENTS. Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-23 17:15:51 -07:00
int regs_query_register_offset(const char *name);
unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);
sparc64:Support User Probes for sparc Signed-off-by: Eric Saint Etienne <eric.saint.etienne@oracle.com> Signed-off-by: Allen Pais <allen.pais@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-13 10:06:13 +05:30
/**
* regs_get_register() - get register value from its offset
* @regs: pt_regs from which register value is gotten
* @offset: offset number of the register.
*
* regs_get_register returns the value of a register whose
* offset from @regs. The @offset is the offset of the register
* in struct pt_regs. If @offset is bigger than MAX_REG_OFFSET,
* this returns 0.
*/
static inline unsigned long regs_get_register(struct pt_regs *regs,
unsigned long offset)
{
if (unlikely(offset >= MAX_REG_OFFSET))
return 0;
if (offset == PT_V9_Y)
return *(unsigned int *)((unsigned long)regs + offset);
return *(unsigned long *)((unsigned long)regs + offset);
}
/* Valid only for Kernel mode traps. */
static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
{
return regs->u_regs[UREG_I6];
}
sparc: unify ptrace.h The two ptrace.h implementations are very alike but the small differences required two set of ifdef/else/endif pairs. The definition of reg_window32 could have been shared but that would have required several updates in sparc32 code as all printk formatting for example assume it is longs. sparc_stackf looked like anohter candidate to share if the 32 bit was renamed to sparc_stackf32. But it contains two pointers in the sparc32 version which would have been 64 bit in the sparc64 version so it was non-trivial. Using a set of accessor macros could do the trick if pursued later. The sparc64 specific definitions are not protected by ifdef - as it should not be required to do so. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 19:42:12 -08:00
#else /* __ASSEMBLY__ */
#endif /* __ASSEMBLY__ */
#else /* (defined(__sparc__) && defined(__arch64__)) */
#ifndef __ASSEMBLY__
sparc32: fix fallout from system.h removal Build failures for the typical configs I use Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-30 15:53:50 +02:00
#include <asm/switch_to.h>
sparc: unify ptrace.h The two ptrace.h implementations are very alike but the small differences required two set of ifdef/else/endif pairs. The definition of reg_window32 could have been shared but that would have required several updates in sparc32 code as all printk formatting for example assume it is longs. sparc_stackf looked like anohter candidate to share if the 32 bit was renamed to sparc_stackf32. But it contains two pointers in the sparc32 version which would have been 64 bit in the sparc64 version so it was non-trivial. Using a set of accessor macros could do the trick if pursued later. The sparc64 specific definitions are not protected by ifdef - as it should not be required to do so. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 19:42:12 -08:00
static inline bool pt_regs_is_syscall(struct pt_regs *regs)
{
return (regs->psr & PSR_SYSCALL);
}
static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
{
return (regs->psr &= ~PSR_SYSCALL);
}
#define arch_ptrace_stop_needed(exit_code, info) \
({ flush_user_windows(); \
current_thread_info()->w_saved != 0; \
})
#define arch_ptrace_stop(exit_code, info) \
synchronize_user_stack()
sparc32: switch to generic kernel_execve() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-28 14:20:01 -04:00
#define current_pt_regs() \
((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
sparc: unify ptrace.h The two ptrace.h implementations are very alike but the small differences required two set of ifdef/else/endif pairs. The definition of reg_window32 could have been shared but that would have required several updates in sparc32 code as all printk formatting for example assume it is longs. sparc_stackf looked like anohter candidate to share if the 32 bit was renamed to sparc_stackf32. But it contains two pointers in the sparc32 version which would have been 64 bit in the sparc64 version so it was non-trivial. Using a set of accessor macros could do the trick if pursued later. The sparc64 specific definitions are not protected by ifdef - as it should not be required to do so. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 19:42:12 -08:00
#define user_mode(regs) (!((regs)->psr & PSR_PS))
#define instruction_pointer(regs) ((regs)->pc)
#define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
unsigned long profile_pc(struct pt_regs *);
#else /* (!__ASSEMBLY__) */
#endif /* (!__ASSEMBLY__) */
#endif /* (defined(__sparc__) && defined(__arch64__)) */
#define STACK_BIAS 2047
/* global_reg_snapshot offsets */
#define GR_SNAP_TSTATE 0x00
#define GR_SNAP_TPC 0x08
#define GR_SNAP_TNPC 0x10
#define GR_SNAP_O7 0x18
#define GR_SNAP_I7 0x20
#define GR_SNAP_RPC 0x28
#define GR_SNAP_THREAD 0x30
#define GR_SNAP_PAD1 0x38
#endif /* !(__SPARC_PTRACE_H) */
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