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-rw-r--r--arch/um/os-Linux/skas/mem.c35
-rw-r--r--arch/um/os-Linux/skas/process.c76
2 files changed, 57 insertions, 54 deletions
diff --git a/arch/um/os-Linux/skas/mem.c b/arch/um/os-Linux/skas/mem.c
index 484e68f9f7a..689b18db798 100644
--- a/arch/um/os-Linux/skas/mem.c
+++ b/arch/um/os-Linux/skas/mem.c
@@ -8,19 +8,16 @@
#include <errno.h>
#include <string.h>
#include <sys/mman.h>
-#include "init.h"
-#include "kern_constants.h"
-#include "as-layout.h"
-#include "mm_id.h"
-#include "os.h"
-#include "proc_mm.h"
-#include "ptrace_user.h"
-#include "registers.h"
-#include "skas.h"
-#include "user.h"
-#include "sysdep/ptrace.h"
-#include "sysdep/stub.h"
-#include "uml-config.h"
+#include <init.h>
+#include <as-layout.h>
+#include <mm_id.h>
+#include <os.h>
+#include <proc_mm.h>
+#include <ptrace_user.h>
+#include <registers.h>
+#include <skas.h>
+#include <sysdep/ptrace.h>
+#include <sysdep/stub.h>
extern unsigned long batch_syscall_stub, __syscall_stub_start;
@@ -40,7 +37,7 @@ static unsigned long syscall_regs[MAX_REG_NR];
static int __init init_syscall_regs(void)
{
- get_safe_registers(syscall_regs);
+ get_safe_registers(syscall_regs, NULL);
syscall_regs[REGS_IP_INDEX] = STUB_CODE +
((unsigned long) &batch_syscall_stub -
(unsigned long) &__syscall_stub_start);
@@ -51,10 +48,6 @@ __initcall(init_syscall_regs);
extern int proc_mm;
-int single_count = 0;
-int multi_count = 0;
-int multi_op_count = 0;
-
static inline long do_syscall_stub(struct mm_id * mm_idp, void **addr)
{
int n, i;
@@ -67,8 +60,6 @@ static inline long do_syscall_stub(struct mm_id * mm_idp, void **addr)
/* FIXME: Need to look up userspace_pid by cpu */
pid = userspace_pid[0];
- multi_count++;
-
n = ptrace_setregs(pid, syscall_regs);
if (n < 0) {
printk(UM_KERN_ERR "Registers - \n");
@@ -129,9 +120,6 @@ long run_syscall_stub(struct mm_id * mm_idp, int syscall,
{
unsigned long *stack = check_init_stack(mm_idp, *addr);
- if (done && *addr == NULL)
- single_count++;
-
*stack += sizeof(long);
stack += *stack / sizeof(long);
@@ -144,7 +132,6 @@ long run_syscall_stub(struct mm_id * mm_idp, int syscall,
*stack++ = args[5];
*stack++ = expected;
*stack = 0;
- multi_op_count++;
if (!done && ((((unsigned long) stack) & ~UM_KERN_PAGE_MASK) <
UM_KERN_PAGE_SIZE - 10 * sizeof(long))) {
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index d6e0a2234b8..908579f2b0a 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -9,31 +9,23 @@
#include <errno.h>
#include <string.h>
#include <sys/mman.h>
-#include <sys/ptrace.h>
#include <sys/wait.h>
#include <asm/unistd.h>
-#include "as-layout.h"
-#include "chan_user.h"
-#include "kern_constants.h"
-#include "kern_util.h"
-#include "mem.h"
-#include "os.h"
-#include "process.h"
-#include "proc_mm.h"
-#include "ptrace_user.h"
-#include "registers.h"
-#include "skas.h"
-#include "skas_ptrace.h"
-#include "user.h"
-#include "sysdep/stub.h"
+#include <as-layout.h>
+#include <init.h>
+#include <kern_util.h>
+#include <mem.h>
+#include <os.h>
+#include <proc_mm.h>
+#include <ptrace_user.h>
+#include <registers.h>
+#include <skas.h>
+#include <skas_ptrace.h>
+#include <sysdep/stub.h>
int is_skas_winch(int pid, int fd, void *data)
{
- if (pid != getpgrp())
- return 0;
-
- register_winch_irq(-1, fd, -1, data, 0);
- return 1;
+ return pid == getpgrp();
}
static int ptrace_dump_regs(int pid)
@@ -169,7 +161,7 @@ static void handle_trap(int pid, struct uml_pt_regs *regs,
if (!local_using_sysemu)
{
- err = ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET,
+ err = ptrace(PTRACE_POKEUSER, pid, PT_SYSCALL_NR_OFFSET,
__NR_getpid);
if (err < 0) {
printk(UM_KERN_ERR "handle_trap - nullifying syscall "
@@ -257,8 +249,8 @@ static int userspace_tramp(void *stack)
set_sigstack((void *) STUB_DATA, UM_KERN_PAGE_SIZE);
sigemptyset(&sa.sa_mask);
- sa.sa_flags = SA_ONSTACK | SA_NODEFER;
- sa.sa_handler = (void *) v;
+ sa.sa_flags = SA_ONSTACK | SA_NODEFER | SA_SIGINFO;
+ sa.sa_sigaction = (void *) v;
sa.sa_restorer = NULL;
if (sigaction(SIGSEGV, &sa, NULL) < 0) {
printk(UM_KERN_ERR "userspace_tramp - setting SIGSEGV "
@@ -354,6 +346,10 @@ void userspace(struct uml_pt_regs *regs)
int err, status, op, pid = userspace_pid[0];
/* To prevent races if using_sysemu changes under us.*/
int local_using_sysemu;
+ siginfo_t si;
+
+ /* Handle any immediate reschedules or signals */
+ interrupt_end();
if (getitimer(ITIMER_VIRTUAL, &timer))
printk(UM_KERN_ERR "Failed to get itimer, errno = %d\n", errno);
@@ -373,6 +369,9 @@ void userspace(struct uml_pt_regs *regs)
if (ptrace(PTRACE_SETREGS, pid, 0, regs->gp))
fatal_sigsegv();
+ if (put_fp_registers(pid, regs->fp))
+ fatal_sigsegv();
+
/* Now we set local_using_sysemu to be used for one loop */
local_using_sysemu = get_using_sysemu();
@@ -399,17 +398,27 @@ void userspace(struct uml_pt_regs *regs)
fatal_sigsegv();
}
+ if (get_fp_registers(pid, regs->fp)) {
+ printk(UM_KERN_ERR "userspace - get_fp_registers failed, "
+ "errno = %d\n", errno);
+ fatal_sigsegv();
+ }
+
UPT_SYSCALL_NR(regs) = -1; /* Assume: It's not a syscall */
if (WIFSTOPPED(status)) {
int sig = WSTOPSIG(status);
+
+ ptrace(PTRACE_GETSIGINFO, pid, 0, (struct siginfo *)&si);
+
switch (sig) {
case SIGSEGV:
if (PTRACE_FULL_FAULTINFO ||
!ptrace_faultinfo) {
get_skas_faultinfo(pid,
&regs->faultinfo);
- (*sig_info[SIGSEGV])(SIGSEGV, regs);
+ (*sig_info[SIGSEGV])(SIGSEGV, (struct siginfo *)&si,
+ regs);
}
else handle_segv(pid, regs);
break;
@@ -417,14 +426,14 @@ void userspace(struct uml_pt_regs *regs)
handle_trap(pid, regs, local_using_sysemu);
break;
case SIGTRAP:
- relay_signal(SIGTRAP, regs);
+ relay_signal(SIGTRAP, (struct siginfo *)&si, regs);
break;
case SIGVTALRM:
now = os_nsecs();
if (now < nsecs)
break;
block_signals();
- (*sig_info[sig])(sig, regs);
+ (*sig_info[sig])(sig, (struct siginfo *)&si, regs);
unblock_signals();
nsecs = timer.it_value.tv_sec *
UM_NSEC_PER_SEC +
@@ -438,7 +447,7 @@ void userspace(struct uml_pt_regs *regs)
case SIGFPE:
case SIGWINCH:
block_signals();
- (*sig_info[sig])(sig, regs);
+ (*sig_info[sig])(sig, (struct siginfo *)&si, regs);
unblock_signals();
break;
default:
@@ -457,10 +466,11 @@ void userspace(struct uml_pt_regs *regs)
}
static unsigned long thread_regs[MAX_REG_NR];
+static unsigned long thread_fp_regs[FP_SIZE];
static int __init init_thread_regs(void)
{
- get_safe_registers(thread_regs);
+ get_safe_registers(thread_regs, thread_fp_regs);
/* Set parent's instruction pointer to start of clone-stub */
thread_regs[REGS_IP_INDEX] = STUB_CODE +
(unsigned long) stub_clone_handler -
@@ -503,6 +513,13 @@ int copy_context_skas0(unsigned long new_stack, int pid)
return err;
}
+ err = put_fp_registers(pid, thread_fp_regs);
+ if (err < 0) {
+ printk(UM_KERN_ERR "copy_context_skas0 : put_fp_registers "
+ "failed, pid = %d, err = %d\n", pid, err);
+ return err;
+ }
+
/* set a well known return code for detection of child write failure */
child_data->err = 12345678;
@@ -644,8 +661,7 @@ int start_idle_thread(void *stack, jmp_buf *switch_buf)
{
int n;
- set_handler(SIGWINCH, (__sighandler_t) sig_handler,
- SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGVTALRM, -1);
+ set_handler(SIGWINCH);
/*
* Can't use UML_SETJMP or UML_LONGJMP here because they save
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-10 05:05:36 +0000