summaryrefslogtreecommitdiff
path: root/arch/um/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'arch/um/kernel')
-rw-r--r--arch/um/kernel/Makefile2
-rw-r--r--arch/um/kernel/skas/Makefile2
-rw-r--r--arch/um/kernel/skas/syscall.c50
-rw-r--r--arch/um/kernel/skas/syscall_kern.c43
-rw-r--r--arch/um/kernel/skas/syscall_user.c44
-rw-r--r--arch/um/kernel/syscall.c36
-rw-r--r--arch/um/kernel/syscall_user.c48
-rw-r--r--arch/um/kernel/tt/syscall_kern.c47
-rw-r--r--arch/um/kernel/tt/syscall_user.c35
9 files changed, 115 insertions, 192 deletions
diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
index a8918e80df96..a9cdd00775a3 100644
--- a/arch/um/kernel/Makefile
+++ b/arch/um/kernel/Makefile
@@ -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/
diff --git a/arch/um/kernel/skas/Makefile b/arch/um/kernel/skas/Makefile
index d296d55ade4b..db36c7c95940 100644
--- a/arch/um/kernel/skas/Makefile
+++ b/arch/um/kernel/skas/Makefile
@@ -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
diff --git a/arch/um/kernel/skas/syscall.c b/arch/um/kernel/skas/syscall.c
new file mode 100644
index 000000000000..51fb94076fcf
--- /dev/null
+++ b/arch/um/kernel/skas/syscall.c
@@ -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
+}
diff --git a/arch/um/kernel/skas/syscall_kern.c b/arch/um/kernel/skas/syscall_kern.c
deleted file mode 100644
index bdf040ce5b8e..000000000000
--- a/arch/um/kernel/skas/syscall_kern.c
+++ /dev/null
@@ -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:
- */
diff --git a/arch/um/kernel/skas/syscall_user.c b/arch/um/kernel/skas/syscall_user.c
deleted file mode 100644
index 6b0664970147..000000000000
--- a/arch/um/kernel/skas/syscall_user.c
+++ /dev/null
@@ -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:
- */
diff --git a/arch/um/kernel/syscall.c b/arch/um/kernel/syscall.c
new file mode 100644
index 000000000000..1429c131879d
--- /dev/null
+++ b/arch/um/kernel/syscall.c
@@ -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();
+}
diff --git a/arch/um/kernel/syscall_user.c b/arch/um/kernel/syscall_user.c
deleted file mode 100644
index 01b711e00a85..000000000000
--- a/arch/um/kernel/syscall_user.c
+++ /dev/null
@@ -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:
- */
diff --git a/arch/um/kernel/tt/syscall_kern.c b/arch/um/kernel/tt/syscall_kern.c
index 2650a628719e..3d29c90514cc 100644
--- a/arch/um/kernel/tt/syscall_kern.c
+++ b/arch/um/kernel/tt/syscall_kern.c
@@ -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;
-/*
- * 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:
- */
+ SC_SET_SYSCALL_RETURN(sc, result);
+
+ syscall_trace(&regs->regs, 1);
+#ifdef CONFIG_SYSCALL_DEBUG
+ record_syscall_end(index, result);
+#endif
+}
diff --git a/arch/um/kernel/tt/syscall_user.c b/arch/um/kernel/tt/syscall_user.c
index b218316cfdb2..902987bf379b 100644
--- a/arch/um/kernel/tt/syscall_user.c
+++ b/arch/um/kernel/tt/syscall_user.c
@@ -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;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-15 19:30:29 +0000