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[PATCH] uml: system call path cleanup 

This merges two sets of files which had no business being split apart in the
first place.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jeff Dike 2005-09-03 15:57:42 -07:00 committed by Linus Torvalds
parent 08964c565b
commit e32dacb9f4
13 changed files with 131 additions and 215 deletions
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12
arch/um/include/syscall.h Normal file
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@ -0,0 +1,12 @@
/*
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#ifndef __SYSCALL_USER_H
#define __SYSCALL_USER_H
extern int record_syscall_start(int syscall);
extern void record_syscall_end(int index, long result);
#endif

23
arch/um/include/syscall_user.h
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@ -1,23 +0,0 @@
/*
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#ifndef __SYSCALL_USER_H
#define __SYSCALL_USER_H
extern int record_syscall_start(int syscall);
extern void record_syscall_end(int index, long result);
#endif
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
* adjust the settings for this buffer only. This must remain at the end
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
* c-file-style: "linux"
* End:
*/

2
arch/um/include/sysdep-i386/syscalls.h
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@ -16,6 +16,8 @@ extern syscall_handler_t sys_rt_sigaction;
extern syscall_handler_t old_mmap_i386;
extern syscall_handler_t *sys_call_table[];
#define EXECUTE_SYSCALL(syscall, regs) \
((long (*)(struct syscall_args)) (*sys_call_table[syscall]))(SYSCALL_ARGS(&regs->regs))

2
arch/um/include/sysdep-x86_64/syscalls.h
View File

@ -14,6 +14,8 @@ typedef long syscall_handler_t(void);
extern syscall_handler_t *ia32_sys_call_table[];
extern syscall_handler_t *sys_call_table[];
#define EXECUTE_SYSCALL(syscall, regs) \
(((long (*)(long, long, long, long, long, long)) \
(*sys_call_table[syscall]))(UPT_SYSCALL_ARG1(&regs->regs), \

2
arch/um/kernel/Makefile
View File

@ -18,7 +18,7 @@ obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o
obj-$(CONFIG_GPROF) += gprof_syms.o
obj-$(CONFIG_GCOV) += gmon_syms.o
obj-$(CONFIG_TTY_LOG) += tty_log.o
obj-$(CONFIG_SYSCALL_DEBUG) += syscall_user.o
obj-$(CONFIG_SYSCALL_DEBUG) += syscall.o
obj-$(CONFIG_MODE_TT) += tt/
obj-$(CONFIG_MODE_SKAS) += skas/

2
arch/um/kernel/skas/Makefile
View File

@ -4,7 +4,7 @@
#
obj-y := clone.o exec_kern.o mem.o mem_user.o mmu.o process.o process_kern.o \
syscall_kern.o syscall_user.o tlb.o trap_user.o uaccess.o \
syscall.o tlb.o trap_user.o uaccess.o
subdir- := util

50
arch/um/kernel/skas/syscall.c Normal file
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@ -0,0 +1,50 @@
/*
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#include "linux/sys.h"
#include "linux/ptrace.h"
#include "asm/errno.h"
#include "asm/unistd.h"
#include "asm/ptrace.h"
#include "asm/current.h"
#include "sysdep/syscalls.h"
#include "kern_util.h"
#include "syscall.h"
void handle_syscall(union uml_pt_regs *r)
{
struct pt_regs *regs = container_of(r, struct pt_regs, regs);
long result;
int syscall;
#ifdef UML_CONFIG_SYSCALL_DEBUG
int index;
index = record_syscall_start(UPT_SYSCALL_NR(r));
#endif
syscall_trace(r, 0);
current->thread.nsyscalls++;
nsyscalls++;
/* This should go in the declaration of syscall, but when I do that,
* strace -f -c bash -c 'ls ; ls' breaks, sometimes not tracing
* children at all, sometimes hanging when bash doesn't see the first
* ls exit.
* The assembly looks functionally the same to me. This is
* gcc version 4.0.1 20050727 (Red Hat 4.0.1-5)
* in case it's a compiler bug.
*/
syscall = UPT_SYSCALL_NR(r);
if((syscall >= NR_syscalls) || (syscall < 0))
result = -ENOSYS;
else result = EXECUTE_SYSCALL(syscall, regs);
REGS_SET_SYSCALL_RETURN(r->skas.regs, result);
syscall_trace(r, 1);
#ifdef UML_CONFIG_SYSCALL_DEBUG
record_syscall_end(index, result);
#endif
}

43
arch/um/kernel/skas/syscall_kern.c
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@ -1,43 +0,0 @@
/*
* Copyright (C) 2002 - 2003 Jeff Dike (jdike@addtoit.com)
* Licensed under the GPL
*/
#include "linux/sys.h"
#include "linux/ptrace.h"
#include "asm/errno.h"
#include "asm/unistd.h"
#include "asm/ptrace.h"
#include "asm/current.h"
#include "sysdep/syscalls.h"
#include "kern_util.h"
extern syscall_handler_t *sys_call_table[];
long execute_syscall_skas(void *r)
{
struct pt_regs *regs = r;
long res;
int syscall;
current->thread.nsyscalls++;
nsyscalls++;
syscall = UPT_SYSCALL_NR(&regs->regs);
if((syscall >= NR_syscalls) || (syscall < 0))
res = -ENOSYS;
else res = EXECUTE_SYSCALL(syscall, regs);
return(res);
}
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
* adjust the settings for this buffer only. This must remain at the end
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
* c-file-style: "linux"
* End:
*/

44
arch/um/kernel/skas/syscall_user.c
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@ -1,44 +0,0 @@
/*
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#include <stdlib.h>
#include <signal.h>
#include "kern_util.h"
#include "uml-config.h"
#include "syscall_user.h"
#include "sysdep/ptrace.h"
#include "sysdep/sigcontext.h"
#include "skas.h"
void handle_syscall(union uml_pt_regs *regs)
{
long result;
#ifdef UML_CONFIG_SYSCALL_DEBUG
int index;
index = record_syscall_start(UPT_SYSCALL_NR(regs));
#endif
syscall_trace(regs, 0);
result = execute_syscall_skas(regs);
REGS_SET_SYSCALL_RETURN(regs->skas.regs, result);
syscall_trace(regs, 1);
#ifdef UML_CONFIG_SYSCALL_DEBUG
record_syscall_end(index, result);
#endif
}
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
* adjust the settings for this buffer only. This must remain at the end
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
* c-file-style: "linux"
* End:
*/

36
arch/um/kernel/syscall.c Normal file
View File

@ -0,0 +1,36 @@
/*
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#include "kern_util.h"
#include "syscall.h"
#include "os.h"
struct {
int syscall;
int pid;
long result;
unsigned long long start;
unsigned long long end;
} syscall_record[1024];
int record_syscall_start(int syscall)
{
int max, index;
max = sizeof(syscall_record)/sizeof(syscall_record[0]);
index = next_syscall_index(max);
syscall_record[index].syscall = syscall;
syscall_record[index].pid = current_pid();
syscall_record[index].result = 0xdeadbeef;
syscall_record[index].start = os_usecs();
return(index);
}
void record_syscall_end(int index, long result)
{
syscall_record[index].result = result;
syscall_record[index].end = os_usecs();
}

48
arch/um/kernel/syscall_user.c
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@ -1,48 +0,0 @@
/*
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#include <stdlib.h>
#include <sys/time.h>
#include "kern_util.h"
#include "syscall_user.h"
struct {
int syscall;
int pid;
long result;
struct timeval start;
struct timeval end;
} syscall_record[1024];
int record_syscall_start(int syscall)
{
int max, index;
max = sizeof(syscall_record)/sizeof(syscall_record[0]);
index = next_syscall_index(max);
syscall_record[index].syscall = syscall;
syscall_record[index].pid = current_pid();
syscall_record[index].result = 0xdeadbeef;
gettimeofday(&syscall_record[index].start, NULL);
return(index);
}
void record_syscall_end(int index, long result)
{
syscall_record[index].result = result;
gettimeofday(&syscall_record[index].end, NULL);
}
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
* adjust the settings for this buffer only. This must remain at the end
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
* c-file-style: "linux"
* End:
*/

47
arch/um/kernel/tt/syscall_kern.c
View File

@ -12,36 +12,41 @@
#include "asm/uaccess.h"
#include "asm/stat.h"
#include "sysdep/syscalls.h"
#include "sysdep/sigcontext.h"
#include "kern_util.h"
#include "syscall.h"
extern syscall_handler_t *sys_call_table[];
long execute_syscall_tt(void *r)
void syscall_handler_tt(int sig, struct pt_regs *regs)
{
struct pt_regs *regs = r;
long res;
void *sc;
long result;
int syscall;
#ifdef CONFIG_SYSCALL_DEBUG
int index;
index = record_syscall_start(syscall);
#endif
sc = UPT_SC(&regs->regs);
SC_START_SYSCALL(sc);
syscall_trace(&regs->regs, 0);
current->thread.nsyscalls++;
nsyscalls++;
#endif
syscall = UPT_SYSCALL_NR(&regs->regs);
if((syscall >= NR_syscalls) || (syscall < 0))
res = -ENOSYS;
else res = EXECUTE_SYSCALL(syscall, regs);
result = -ENOSYS;
else result = EXECUTE_SYSCALL(syscall, regs);
return(res);
/* regs->sc may have changed while the system call ran (there may
* have been an interrupt or segfault), so it needs to be refreshed.
*/
UPT_SC(&regs->regs) = sc;
SC_SET_SYSCALL_RETURN(sc, result);
syscall_trace(&regs->regs, 1);
#ifdef CONFIG_SYSCALL_DEBUG
record_syscall_end(index, result);
#endif
}
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
* adjust the settings for this buffer only. This must remain at the end
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
* c-file-style: "linux"
* End:
*/

35
arch/um/kernel/tt/syscall_user.c
View File

@ -13,42 +13,9 @@
#include "task.h"
#include "user_util.h"
#include "kern_util.h"
#include "syscall_user.h"
#include "syscall.h"
#include "tt.h"
void syscall_handler_tt(int sig, union uml_pt_regs *regs)
{
void *sc;
long result;
int syscall;
#ifdef UML_CONFIG_DEBUG_SYSCALL
int index;
#endif
syscall = UPT_SYSCALL_NR(regs);
sc = UPT_SC(regs);
SC_START_SYSCALL(sc);
#ifdef UML_CONFIG_DEBUG_SYSCALL
index = record_syscall_start(syscall);
#endif
syscall_trace(regs, 0);
result = execute_syscall_tt(regs);
/* regs->sc may have changed while the system call ran (there may
* have been an interrupt or segfault), so it needs to be refreshed.
*/
UPT_SC(regs) = sc;
SC_SET_SYSCALL_RETURN(sc, result);
syscall_trace(regs, 1);
#ifdef UML_CONFIG_DEBUG_SYSCALL
record_syscall_end(index, result);
#endif
}
void do_sigtrap(void *task)
{
UPT_SYSCALL_NR(TASK_REGS(task)) = -1;