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Merge branch 'for-um' of git://git.kernel.org/pub/scm/linux/kernel/gi…
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…t/viro/signal into for-3.5
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Richard Weinberger committed May 21, 2012
2 parents 8756826 + ffc51be commit 2ccf62b
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Showing 17 changed files with 174 additions and 299 deletions.
2 changes: 1 addition & 1 deletion arch/um/include/asm/thread_info.h
Original file line number Diff line number Diff line change
Expand Up @@ -71,13 +71,13 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_MEMDIE 5 /* is terminating due to OOM killer */
#define TIF_SYSCALL_AUDIT 6
#define TIF_RESTORE_SIGMASK 7
#define TIF_NOTIFY_RESUME 8

#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
#define _TIF_MEMDIE (1 << TIF_MEMDIE)
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)

#endif
10 changes: 8 additions & 2 deletions arch/um/kernel/process.c
Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@
#include <linux/seq_file.h>
#include <linux/tick.h>
#include <linux/threads.h>
#include <linux/tracehook.h>
#include <asm/current.h>
#include <asm/pgtable.h>
#include <asm/mmu_context.h>
Expand Down Expand Up @@ -114,8 +115,13 @@ void interrupt_end(void)
{
if (need_resched())
schedule();
if (test_tsk_thread_flag(current, TIF_SIGPENDING))
if (test_thread_flag(TIF_SIGPENDING))
do_signal();
if (test_and_clear_thread_flag(TIF_NOTIFY_RESUME)) {
tracehook_notify_resume(&current->thread.regs);
if (current->replacement_session_keyring)
key_replace_session_keyring();
}
}

void exit_thread(void)
Expand Down Expand Up @@ -190,7 +196,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
if (current->thread.forking) {
memcpy(&p->thread.regs.regs, &regs->regs,
sizeof(p->thread.regs.regs));
REGS_SET_SYSCALL_RETURN(p->thread.regs.regs.gp, 0);
UPT_SET_SYSCALL_RETURN(&p->thread.regs.regs, 0);
if (sp != 0)
REGS_SP(p->thread.regs.regs.gp) = sp;

Expand Down
14 changes: 5 additions & 9 deletions arch/um/kernel/signal.c
Original file line number Diff line number Diff line change
Expand Up @@ -29,9 +29,6 @@ static int handle_signal(struct pt_regs *regs, unsigned long signr,
unsigned long sp;
int err;

/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;

/* Did we come from a system call? */
if (PT_REGS_SYSCALL_NR(regs) >= 0) {
/* If so, check system call restarting.. */
Expand Down Expand Up @@ -77,15 +74,14 @@ static int kern_do_signal(struct pt_regs *regs)
{
struct k_sigaction ka_copy;
siginfo_t info;
sigset_t *oldset;
int sig, handled_sig = 0;

if (test_thread_flag(TIF_RESTORE_SIGMASK))
oldset = &current->saved_sigmask;
else
oldset = &current->blocked;

while ((sig = get_signal_to_deliver(&info, &ka_copy, regs, NULL)) > 0) {
sigset_t *oldset;
if (test_thread_flag(TIF_RESTORE_SIGMASK))
oldset = &current->saved_sigmask;
else
oldset = &current->blocked;
handled_sig = 1;
/* Whee! Actually deliver the signal. */
if (!handle_signal(regs, sig, &ka_copy, &info, oldset)) {
Expand Down
2 changes: 1 addition & 1 deletion arch/um/kernel/skas/syscall.c
Original file line number Diff line number Diff line change
Expand Up @@ -34,7 +34,7 @@ void handle_syscall(struct uml_pt_regs *r)
result = -ENOSYS;
else result = EXECUTE_SYSCALL(syscall, regs);

REGS_SET_SYSCALL_RETURN(r->gp, result);
UPT_SET_SYSCALL_RETURN(r, result);

syscall_trace(r, 1);
}
42 changes: 21 additions & 21 deletions arch/x86/um/asm/elf.h
Original file line number Diff line number Diff line change
Expand Up @@ -34,25 +34,25 @@
#define ELF_ARCH EM_386

#define ELF_PLAT_INIT(regs, load_addr) do { \
PT_REGS_EBX(regs) = 0; \
PT_REGS_ECX(regs) = 0; \
PT_REGS_EDX(regs) = 0; \
PT_REGS_ESI(regs) = 0; \
PT_REGS_EDI(regs) = 0; \
PT_REGS_EBP(regs) = 0; \
PT_REGS_EAX(regs) = 0; \
PT_REGS_BX(regs) = 0; \
PT_REGS_CX(regs) = 0; \
PT_REGS_DX(regs) = 0; \
PT_REGS_SI(regs) = 0; \
PT_REGS_DI(regs) = 0; \
PT_REGS_BP(regs) = 0; \
PT_REGS_AX(regs) = 0; \
} while (0)

/* Shamelessly stolen from include/asm-i386/elf.h */

#define ELF_CORE_COPY_REGS(pr_reg, regs) do { \
pr_reg[0] = PT_REGS_EBX(regs); \
pr_reg[1] = PT_REGS_ECX(regs); \
pr_reg[2] = PT_REGS_EDX(regs); \
pr_reg[3] = PT_REGS_ESI(regs); \
pr_reg[4] = PT_REGS_EDI(regs); \
pr_reg[5] = PT_REGS_EBP(regs); \
pr_reg[6] = PT_REGS_EAX(regs); \
pr_reg[0] = PT_REGS_BX(regs); \
pr_reg[1] = PT_REGS_CX(regs); \
pr_reg[2] = PT_REGS_DX(regs); \
pr_reg[3] = PT_REGS_SI(regs); \
pr_reg[4] = PT_REGS_DI(regs); \
pr_reg[5] = PT_REGS_BP(regs); \
pr_reg[6] = PT_REGS_AX(regs); \
pr_reg[7] = PT_REGS_DS(regs); \
pr_reg[8] = PT_REGS_ES(regs); \
/* fake once used fs and gs selectors? */ \
Expand Down Expand Up @@ -130,13 +130,13 @@ do { \
#define ELF_ARCH EM_X86_64

#define ELF_PLAT_INIT(regs, load_addr) do { \
PT_REGS_RBX(regs) = 0; \
PT_REGS_RCX(regs) = 0; \
PT_REGS_RDX(regs) = 0; \
PT_REGS_RSI(regs) = 0; \
PT_REGS_RDI(regs) = 0; \
PT_REGS_RBP(regs) = 0; \
PT_REGS_RAX(regs) = 0; \
PT_REGS_BX(regs) = 0; \
PT_REGS_CX(regs) = 0; \
PT_REGS_DX(regs) = 0; \
PT_REGS_SI(regs) = 0; \
PT_REGS_DI(regs) = 0; \
PT_REGS_BP(regs) = 0; \
PT_REGS_AX(regs) = 0; \
PT_REGS_R8(regs) = 0; \
PT_REGS_R9(regs) = 0; \
PT_REGS_R10(regs) = 0; \
Expand Down
34 changes: 34 additions & 0 deletions arch/x86/um/asm/ptrace.h
Original file line number Diff line number Diff line change
@@ -1,5 +1,39 @@
#ifndef __UM_X86_PTRACE_H
#define __UM_X86_PTRACE_H

#ifdef CONFIG_X86_32
# include "ptrace_32.h"
#else
# include "ptrace_64.h"
#endif

#define PT_REGS_AX(r) UPT_AX(&(r)->regs)
#define PT_REGS_BX(r) UPT_BX(&(r)->regs)
#define PT_REGS_CX(r) UPT_CX(&(r)->regs)
#define PT_REGS_DX(r) UPT_DX(&(r)->regs)

#define PT_REGS_SI(r) UPT_SI(&(r)->regs)
#define PT_REGS_DI(r) UPT_DI(&(r)->regs)
#define PT_REGS_BP(r) UPT_BP(&(r)->regs)
#define PT_REGS_EFLAGS(r) UPT_EFLAGS(&(r)->regs)

#define PT_REGS_CS(r) UPT_CS(&(r)->regs)
#define PT_REGS_SS(r) UPT_SS(&(r)->regs)
#define PT_REGS_DS(r) UPT_DS(&(r)->regs)
#define PT_REGS_ES(r) UPT_ES(&(r)->regs)

#define PT_REGS_ORIG_SYSCALL(r) PT_REGS_AX(r)
#define PT_REGS_SYSCALL_RET(r) PT_REGS_AX(r)

#define PT_FIX_EXEC_STACK(sp) do ; while(0)

#define profile_pc(regs) PT_REGS_IP(regs)

#define UPT_RESTART_SYSCALL(r) (UPT_IP(r) -= 2)
#define UPT_SET_SYSCALL_RETURN(r, res) (UPT_AX(r) = (res))

static inline long regs_return_value(struct uml_pt_regs *regs)
{
return UPT_AX(regs);
}
#endif /* __UM_X86_PTRACE_H */
23 changes: 0 additions & 23 deletions arch/x86/um/asm/ptrace_32.h
Original file line number Diff line number Diff line change
Expand Up @@ -11,29 +11,6 @@
#include "linux/compiler.h"
#include "asm/ptrace-generic.h"

#define PT_REGS_EAX(r) UPT_EAX(&(r)->regs)
#define PT_REGS_EBX(r) UPT_EBX(&(r)->regs)
#define PT_REGS_ECX(r) UPT_ECX(&(r)->regs)
#define PT_REGS_EDX(r) UPT_EDX(&(r)->regs)
#define PT_REGS_ESI(r) UPT_ESI(&(r)->regs)
#define PT_REGS_EDI(r) UPT_EDI(&(r)->regs)
#define PT_REGS_EBP(r) UPT_EBP(&(r)->regs)

#define PT_REGS_CS(r) UPT_CS(&(r)->regs)
#define PT_REGS_SS(r) UPT_SS(&(r)->regs)
#define PT_REGS_DS(r) UPT_DS(&(r)->regs)
#define PT_REGS_ES(r) UPT_ES(&(r)->regs)
#define PT_REGS_FS(r) UPT_FS(&(r)->regs)
#define PT_REGS_GS(r) UPT_GS(&(r)->regs)

#define PT_REGS_EFLAGS(r) UPT_EFLAGS(&(r)->regs)

#define PT_REGS_ORIG_SYSCALL(r) PT_REGS_EAX(r)
#define PT_REGS_SYSCALL_RET(r) PT_REGS_EAX(r)
#define PT_FIX_EXEC_STACK(sp) do ; while(0)

#define profile_pc(regs) PT_REGS_IP(regs)

#define user_mode(r) UPT_IS_USER(&(r)->regs)

/*
Expand Down
26 changes: 0 additions & 26 deletions arch/x86/um/asm/ptrace_64.h
Original file line number Diff line number Diff line change
Expand Up @@ -15,13 +15,6 @@

#define HOST_AUDIT_ARCH AUDIT_ARCH_X86_64

#define PT_REGS_RBX(r) UPT_RBX(&(r)->regs)
#define PT_REGS_RCX(r) UPT_RCX(&(r)->regs)
#define PT_REGS_RDX(r) UPT_RDX(&(r)->regs)
#define PT_REGS_RSI(r) UPT_RSI(&(r)->regs)
#define PT_REGS_RDI(r) UPT_RDI(&(r)->regs)
#define PT_REGS_RBP(r) UPT_RBP(&(r)->regs)
#define PT_REGS_RAX(r) UPT_RAX(&(r)->regs)
#define PT_REGS_R8(r) UPT_R8(&(r)->regs)
#define PT_REGS_R9(r) UPT_R9(&(r)->regs)
#define PT_REGS_R10(r) UPT_R10(&(r)->regs)
Expand All @@ -31,27 +24,8 @@
#define PT_REGS_R14(r) UPT_R14(&(r)->regs)
#define PT_REGS_R15(r) UPT_R15(&(r)->regs)

#define PT_REGS_FS(r) UPT_FS(&(r)->regs)
#define PT_REGS_GS(r) UPT_GS(&(r)->regs)
#define PT_REGS_DS(r) UPT_DS(&(r)->regs)
#define PT_REGS_ES(r) UPT_ES(&(r)->regs)
#define PT_REGS_SS(r) UPT_SS(&(r)->regs)
#define PT_REGS_CS(r) UPT_CS(&(r)->regs)

#define PT_REGS_ORIG_RAX(r) UPT_ORIG_RAX(&(r)->regs)
#define PT_REGS_RIP(r) UPT_IP(&(r)->regs)
#define PT_REGS_SP(r) UPT_SP(&(r)->regs)

#define PT_REGS_EFLAGS(r) UPT_EFLAGS(&(r)->regs)

/* XXX */
#define user_mode(r) UPT_IS_USER(&(r)->regs)
#define PT_REGS_ORIG_SYSCALL(r) PT_REGS_RAX(r)
#define PT_REGS_SYSCALL_RET(r) PT_REGS_RAX(r)

#define PT_FIX_EXEC_STACK(sp) do ; while(0)

#define profile_pc(regs) PT_REGS_IP(regs)

struct user_desc;

Expand Down
67 changes: 63 additions & 4 deletions arch/x86/um/shared/sysdep/ptrace.h
Original file line number Diff line number Diff line change
@@ -1,15 +1,74 @@
#ifndef __SYSDEP_X86_PTRACE_H
#define __SYSDEP_X86_PTRACE_H

#include <generated/user_constants.h>
#include "sysdep/faultinfo.h"

#define MAX_REG_OFFSET (UM_FRAME_SIZE)
#define MAX_REG_NR ((MAX_REG_OFFSET) / sizeof(unsigned long))

#define REGS_IP(r) ((r)[HOST_IP])
#define REGS_SP(r) ((r)[HOST_SP])
#define REGS_EFLAGS(r) ((r)[HOST_EFLAGS])
#define REGS_AX(r) ((r)[HOST_AX])
#define REGS_BX(r) ((r)[HOST_BX])
#define REGS_CX(r) ((r)[HOST_CX])
#define REGS_DX(r) ((r)[HOST_DX])
#define REGS_SI(r) ((r)[HOST_SI])
#define REGS_DI(r) ((r)[HOST_DI])
#define REGS_BP(r) ((r)[HOST_BP])
#define REGS_CS(r) ((r)[HOST_CS])
#define REGS_SS(r) ((r)[HOST_SS])
#define REGS_DS(r) ((r)[HOST_DS])
#define REGS_ES(r) ((r)[HOST_ES])

#define UPT_IP(r) REGS_IP((r)->gp)
#define UPT_SP(r) REGS_SP((r)->gp)
#define UPT_EFLAGS(r) REGS_EFLAGS((r)->gp)
#define UPT_AX(r) REGS_AX((r)->gp)
#define UPT_BX(r) REGS_BX((r)->gp)
#define UPT_CX(r) REGS_CX((r)->gp)
#define UPT_DX(r) REGS_DX((r)->gp)
#define UPT_SI(r) REGS_SI((r)->gp)
#define UPT_DI(r) REGS_DI((r)->gp)
#define UPT_BP(r) REGS_BP((r)->gp)
#define UPT_CS(r) REGS_CS((r)->gp)
#define UPT_SS(r) REGS_SS((r)->gp)
#define UPT_DS(r) REGS_DS((r)->gp)
#define UPT_ES(r) REGS_ES((r)->gp)

#ifdef __i386__
#include "ptrace_32.h"
#else
#include "ptrace_64.h"
#endif

static inline long regs_return_value(struct uml_pt_regs *regs)
{
return UPT_SYSCALL_RET(regs);
}
struct syscall_args {
unsigned long args[6];
};

#define SYSCALL_ARGS(r) ((struct syscall_args) \
{ .args = { UPT_SYSCALL_ARG1(r), \
UPT_SYSCALL_ARG2(r), \
UPT_SYSCALL_ARG3(r), \
UPT_SYSCALL_ARG4(r), \
UPT_SYSCALL_ARG5(r), \
UPT_SYSCALL_ARG6(r) } } )

struct uml_pt_regs {
unsigned long gp[MAX_REG_NR];
unsigned long fp[MAX_FP_NR];
struct faultinfo faultinfo;
long syscall;
int is_user;
};

#define EMPTY_UML_PT_REGS { }

#define UPT_SYSCALL_NR(r) ((r)->syscall)
#define UPT_FAULTINFO(r) (&(r)->faultinfo)
#define UPT_IS_USER(r) ((r)->is_user)

extern int user_context(unsigned long sp);

#endif /* __SYSDEP_X86_PTRACE_H */
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