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-rw-r--r--linux-user/alpha/target_signal.h24
-rw-r--r--linux-user/arm/target_signal.h24
-rw-r--r--linux-user/i386/target_signal.h24
-rw-r--r--linux-user/m68k/target_signal.h24
-rw-r--r--linux-user/mips/target_signal.h24
-rw-r--r--linux-user/ppc/target_signal.h24
-rw-r--r--linux-user/ppc64/target_signal.h24
-rw-r--r--linux-user/qemu.h4
-rw-r--r--linux-user/sh4/target_signal.h24
-rw-r--r--linux-user/signal.c156
-rw-r--r--linux-user/sparc/target_signal.h24
-rw-r--r--linux-user/sparc64/target_signal.h24
-rw-r--r--linux-user/syscall.c7
-rw-r--r--linux-user/x86_64/target_signal.h24
14 files changed, 388 insertions, 43 deletions
diff --git a/linux-user/alpha/target_signal.h b/linux-user/alpha/target_signal.h
new file mode 100644
index 0000000000..bf54ac71d8
--- /dev/null
+++ b/linux-user/alpha/target_signal.h
@@ -0,0 +1,24 @@
+#ifndef TARGET_SIGNAL_H
+#define TARGET_SIGNAL_H
+
+#include "cpu.h"
+
+/* this struct defines a stack used during syscall handling */
+
+typedef struct target_sigaltstack {
+ target_ulong ss_sp;
+ target_long ss_flags;
+ target_ulong ss_size;
+} target_stack_t;
+
+
+/*
+ * sigaltstack controls
+ */
+#define TARGET_SS_ONSTACK 1
+#define TARGET_SS_DISABLE 2
+
+#define TARGET_MINSIGSTKSZ 4096
+#define TARGET_SIGSTKSZ 16384
+
+#endif /* TARGET_SIGNAL_H */
diff --git a/linux-user/arm/target_signal.h b/linux-user/arm/target_signal.h
new file mode 100644
index 0000000000..eb4a0bb12c
--- /dev/null
+++ b/linux-user/arm/target_signal.h
@@ -0,0 +1,24 @@
+#ifndef TARGET_SIGNAL_H
+#define TARGET_SIGNAL_H
+
+#include "cpu.h"
+
+/* this struct defines a stack used during syscall handling */
+
+typedef struct target_sigaltstack {
+ target_ulong ss_sp;
+ target_long ss_flags;
+ target_ulong ss_size;
+} target_stack_t;
+
+
+/*
+ * sigaltstack controls
+ */
+#define TARGET_SS_ONSTACK 1
+#define TARGET_SS_DISABLE 2
+
+#define TARGET_MINSIGSTKSZ 2048
+#define TARGET_SIGSTKSZ 8192
+
+#endif /* TARGET_SIGNAL_H */
diff --git a/linux-user/i386/target_signal.h b/linux-user/i386/target_signal.h
new file mode 100644
index 0000000000..eb4a0bb12c
--- /dev/null
+++ b/linux-user/i386/target_signal.h
@@ -0,0 +1,24 @@
+#ifndef TARGET_SIGNAL_H
+#define TARGET_SIGNAL_H
+
+#include "cpu.h"
+
+/* this struct defines a stack used during syscall handling */
+
+typedef struct target_sigaltstack {
+ target_ulong ss_sp;
+ target_long ss_flags;
+ target_ulong ss_size;
+} target_stack_t;
+
+
+/*
+ * sigaltstack controls
+ */
+#define TARGET_SS_ONSTACK 1
+#define TARGET_SS_DISABLE 2
+
+#define TARGET_MINSIGSTKSZ 2048
+#define TARGET_SIGSTKSZ 8192
+
+#endif /* TARGET_SIGNAL_H */
diff --git a/linux-user/m68k/target_signal.h b/linux-user/m68k/target_signal.h
new file mode 100644
index 0000000000..b481195073
--- /dev/null
+++ b/linux-user/m68k/target_signal.h
@@ -0,0 +1,24 @@
+#ifndef TARGET_SIGNAL_H
+#define TARGET_SIGNAL_H
+
+#include "cpu.h"
+
+/* this struct defines a stack used during syscall handling */
+
+typedef struct target_sigaltstack {
+ target_ulong ss_sp;
+ target_long ss_flags;
+ target_ulong ss_size;
+} target_stack_t;
+
+
+/*
+ * sigaltstack controls
+ */
+#define TARGET_SS_ONSTACK 1
+#define TARGET_SS_DISABLE 2
+
+#define TARGET_MINSIGSTKSZ 2048
+#define TARGET_SIGSTKSZ 8192
+
+#endif /* TARGET_SIGNAL_H */
diff --git a/linux-user/mips/target_signal.h b/linux-user/mips/target_signal.h
new file mode 100644
index 0000000000..c94788497c
--- /dev/null
+++ b/linux-user/mips/target_signal.h
@@ -0,0 +1,24 @@
+#ifndef TARGET_SIGNAL_H
+#define TARGET_SIGNAL_H
+
+#include "cpu.h"
+
+/* this struct defines a stack used during syscall handling */
+
+typedef struct target_sigaltstack {
+ target_ulong ss_sp;
+ target_ulong ss_size;
+ target_long ss_flags;
+} target_stack_t;
+
+
+/*
+ * sigaltstack controls
+ */
+#define TARGET_SS_ONSTACK 1
+#define TARGET_SS_DISABLE 2
+
+#define TARGET_MINSIGSTKSZ 2048
+#define TARGET_SIGSTKSZ 8192
+
+#endif /* TARGET_SIGNAL_H */
diff --git a/linux-user/ppc/target_signal.h b/linux-user/ppc/target_signal.h
new file mode 100644
index 0000000000..e210e7a317
--- /dev/null
+++ b/linux-user/ppc/target_signal.h
@@ -0,0 +1,24 @@
+#ifndef TARGET_SIGNAL_H
+#define TARGET_SIGNAL_H
+
+#include "cpu.h"
+
+/* this struct defines a stack used during syscall handling */
+
+typedef struct target_sigaltstack {
+ target_ulong ss_sp;
+ target_long ss_flags;
+ target_ulong ss_size;
+} target_stack_t;
+
+
+/*
+ * sigaltstack controls
+ */
+#define TARGET_SS_ONSTACK 1
+#define TARGET_SS_DISABLE 2
+
+#define TARGET_MINSIGSTKSZ 2048
+#define TARGET_SIGSTKSZ 8192
+
+#endif /* TARGET_SIGNAL_H */
diff --git a/linux-user/ppc64/target_signal.h b/linux-user/ppc64/target_signal.h
new file mode 100644
index 0000000000..e210e7a317
--- /dev/null
+++ b/linux-user/ppc64/target_signal.h
@@ -0,0 +1,24 @@
+#ifndef TARGET_SIGNAL_H
+#define TARGET_SIGNAL_H
+
+#include "cpu.h"
+
+/* this struct defines a stack used during syscall handling */
+
+typedef struct target_sigaltstack {
+ target_ulong ss_sp;
+ target_long ss_flags;
+ target_ulong ss_size;
+} target_stack_t;
+
+
+/*
+ * sigaltstack controls
+ */
+#define TARGET_SS_ONSTACK 1
+#define TARGET_SS_DISABLE 2
+
+#define TARGET_MINSIGSTKSZ 2048
+#define TARGET_SIGSTKSZ 8192
+
+#endif /* TARGET_SIGNAL_H */
diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index 4b857f3d14..78e9ab34fa 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -9,6 +9,7 @@
#include "cpu.h"
#include "syscall.h"
+#include "target_signal.h"
#include "gdbstub.h"
/* This struct is used to hold certain information about the image.
@@ -149,6 +150,9 @@ void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
long do_sigreturn(CPUState *env);
long do_rt_sigreturn(CPUState *env);
+int do_sigaltstack(const struct target_sigaltstack *uss,
+ struct target_sigaltstack *uoss,
+ target_ulong sp);
#ifdef TARGET_I386
/* vm86.c */
diff --git a/linux-user/sh4/target_signal.h b/linux-user/sh4/target_signal.h
new file mode 100644
index 0000000000..e210e7a317
--- /dev/null
+++ b/linux-user/sh4/target_signal.h
@@ -0,0 +1,24 @@
+#ifndef TARGET_SIGNAL_H
+#define TARGET_SIGNAL_H
+
+#include "cpu.h"
+
+/* this struct defines a stack used during syscall handling */
+
+typedef struct target_sigaltstack {
+ target_ulong ss_sp;
+ target_long ss_flags;
+ target_ulong ss_size;
+} target_stack_t;
+
+
+/*
+ * sigaltstack controls
+ */
+#define TARGET_SS_ONSTACK 1
+#define TARGET_SS_DISABLE 2
+
+#define TARGET_MINSIGSTKSZ 2048
+#define TARGET_SIGSTKSZ 8192
+
+#endif /* TARGET_SIGNAL_H */
diff --git a/linux-user/signal.c b/linux-user/signal.c
index 97f10957d4..945dd14e0c 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -26,6 +26,7 @@
#include <errno.h>
#include <sys/ucontext.h>
+#include "target_signal.h"
#include "qemu.h"
//#define DEBUG_SIGNAL
@@ -45,6 +46,12 @@ struct emulated_sigaction {
first signal, we put it here */
};
+struct target_sigaltstack target_sigaltstack_used = {
+ .ss_sp = 0,
+ .ss_size = 0,
+ .ss_flags = TARGET_SS_DISABLE,
+};
+
static struct emulated_sigaction sigact_table[TARGET_NSIG];
static struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */
static struct sigqueue *first_free; /* first free siginfo queue entry */
@@ -92,6 +99,18 @@ static uint8_t host_to_target_signal_table[65] = {
};
static uint8_t target_to_host_signal_table[65];
+static inline int on_sig_stack(unsigned long sp)
+{
+ return (sp - target_sigaltstack_used.ss_sp
+ < target_sigaltstack_used.ss_size);
+}
+
+static inline int sas_ss_flags(unsigned long sp)
+{
+ return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE
+ : on_sig_stack(sp) ? SS_ONSTACK : 0);
+}
+
static inline int host_to_target_signal(int sig)
{
return host_to_target_signal_table[sig];
@@ -419,6 +438,67 @@ static void host_signal_handler(int host_signum, siginfo_t *info,
}
}
+int do_sigaltstack(const struct target_sigaltstack *uss,
+ struct target_sigaltstack *uoss,
+ target_ulong sp)
+{
+ int ret;
+ struct target_sigaltstack oss;
+
+ /* XXX: test errors */
+ if(uoss)
+ {
+ __put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp);
+ __put_user(target_sigaltstack_used.ss_size, &oss.ss_size);
+ __put_user(sas_ss_flags(sp), &oss.ss_flags);
+ }
+
+ if(uss)
+ {
+ struct target_sigaltstack ss;
+
+ ret = -EFAULT;
+ if (!access_ok(VERIFY_READ, uss, sizeof(*uss))
+ || __get_user(ss.ss_sp, &uss->ss_sp)
+ || __get_user(ss.ss_size, &uss->ss_size)
+ || __get_user(ss.ss_flags, &uss->ss_flags))
+ goto out;
+
+ ret = -EPERM;
+ if (on_sig_stack(sp))
+ goto out;
+
+ ret = -EINVAL;
+ if (ss.ss_flags != TARGET_SS_DISABLE
+ && ss.ss_flags != TARGET_SS_ONSTACK
+ && ss.ss_flags != 0)
+ goto out;
+
+ if (ss.ss_flags == TARGET_SS_DISABLE) {
+ ss.ss_size = 0;
+ ss.ss_sp = 0;
+ } else {
+ ret = -ENOMEM;
+ if (ss.ss_size < MINSIGSTKSZ)
+ goto out;
+ }
+
+ target_sigaltstack_used.ss_sp = ss.ss_sp;
+ target_sigaltstack_used.ss_size = ss.ss_size;
+ }
+
+ if (uoss) {
+ ret = -EFAULT;
+ if (!access_ok(VERIFY_WRITE, uoss, sizeof(oss)))
+ goto out;
+ memcpy(uoss, &oss, sizeof(oss));
+ }
+
+ ret = 0;
+out:
+ return ret;
+}
+
int do_sigaction(int sig, const struct target_sigaction *act,
struct target_sigaction *oact)
{
@@ -551,12 +631,6 @@ struct target_sigcontext {
target_ulong cr2;
};
-typedef struct target_sigaltstack {
- target_ulong ss_sp;
- int ss_flags;
- target_ulong ss_size;
-} target_stack_t;
-
struct target_ucontext {
target_ulong tuc_flags;
target_ulong tuc_link;
@@ -640,16 +714,14 @@ get_sigframe(struct emulated_sigaction *ka, CPUX86State *env, size_t frame_size)
/* Default to using normal stack */
esp = env->regs[R_ESP];
-#if 0
/* This is the X/Open sanctioned signal stack switching. */
- if (ka->sa.sa_flags & SA_ONSTACK) {
- if (sas_ss_flags(esp) == 0)
- esp = current->sas_ss_sp + current->sas_ss_size;
- }
+ if (ka->sa.sa_flags & TARGET_SA_ONSTACK) {
+ if (sas_ss_flags(esp) == 0)
+ esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
+ }
/* This is the legacy signal stack switching. */
else
-#endif
if ((env->segs[R_SS].selector & 0xffff) != __USER_DS &&
!(ka->sa.sa_flags & TARGET_SA_RESTORER) &&
ka->sa.sa_restorer) {
@@ -750,11 +822,11 @@ static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.tuc_flags);
err |= __put_user(0, &frame->uc.tuc_link);
- err |= __put_user(/*current->sas_ss_sp*/ 0,
+ err |= __put_user(target_sigaltstack_used.ss_sp,
&frame->uc.tuc_stack.ss_sp);
- err |= __put_user(/* sas_ss_flags(regs->esp) */ 0,
+ err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
&frame->uc.tuc_stack.ss_flags);
- err |= __put_user(/* current->sas_ss_size */ 0,
+ err |= __put_user(target_sigaltstack_used.ss_size,
&frame->uc.tuc_stack.ss_size);
err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate,
env, set->sig[0]);
@@ -880,7 +952,6 @@ long do_rt_sigreturn(CPUX86State *env)
{
struct rt_sigframe *frame = (struct rt_sigframe *)g2h(env->regs[R_ESP] - 4);
sigset_t set;
- // stack_t st;
int eax;
#if 0
@@ -893,13 +964,9 @@ long do_rt_sigreturn(CPUX86State *env)
if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
goto badframe;
-#if 0
- if (__copy_from_user(&st, &frame->uc.tuc_stack, sizeof(st)))
+ if (do_sigaltstack(&frame->uc.tuc_stack, NULL, get_sp_from_cpustate(env)) == -EFAULT)
goto badframe;
- /* It is more difficult to avoid calling this function than to
- call it and ignore errors. */
- do_sigaltstack(&st, NULL, regs->esp);
-#endif
+
return eax;
badframe:
@@ -933,12 +1000,6 @@ struct target_sigcontext {
target_ulong fault_address;
};
-typedef struct target_sigaltstack {
- target_ulong ss_sp;
- int ss_flags;
- target_ulong ss_size;
-} target_stack_t;
-
struct target_ucontext {
target_ulong tuc_flags;
target_ulong tuc_link;
@@ -1031,13 +1092,11 @@ get_sigframe(struct emulated_sigaction *ka, CPUState *regs, int framesize)
{
unsigned long sp = regs->regs[13];
-#if 0
/*
* This is the X/Open sanctioned signal stack switching.
*/
- if ((ka->sa.sa_flags & SA_ONSTACK) && !sas_ss_flags(sp))
- sp = current->sas_ss_sp + current->sas_ss_size;
-#endif
+ if ((ka->sa.sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
+ sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
/*
* ATPCS B01 mandates 8-byte alignment
*/
@@ -1074,8 +1133,8 @@ setup_return(CPUState *env, struct emulated_sigaction *ka,
else
cpsr &= ~T_BIT;
}
-#endif
-#endif
+#endif /* CONFIG_ARM_THUMB */
+#endif /* 0 */
#endif /* TARGET_CONFIG_CPU_32 */
if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
@@ -1132,6 +1191,7 @@ static void setup_rt_frame(int usig, struct emulated_sigaction *ka,
target_sigset_t *set, CPUState *env)
{
struct rt_sigframe *frame = get_sigframe(ka, env, sizeof(*frame));
+ struct target_sigaltstack stack;
int i, err = 0;
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
@@ -1144,6 +1204,15 @@ static void setup_rt_frame(int usig, struct emulated_sigaction *ka,
/* Clear all the bits of the ucontext we don't use. */
memset(&frame->uc, 0, offsetof(struct target_ucontext, tuc_mcontext));
+ memset(&stack, 0, sizeof(stack));
+ __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
+ __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
+ __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
+ if (!access_ok(VERIFY_WRITE, &frame->uc.tuc_stack, sizeof(stack)))
+ err = 1;
+ else
+ memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
+
err |= setup_sigcontext(&frame->uc.tuc_mcontext, /*&frame->fpstate,*/
env, set->sig[0]);
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
@@ -1270,6 +1339,9 @@ long do_rt_sigreturn(CPUState *env)
if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
goto badframe;
+ if (do_sigaltstack(&frame->uc.tuc_stack, NULL, get_sp_from_cpustate(env)) == -EFAULT)
+ goto badframe;
+
#if 0
/* Send SIGTRAP if we're single-stepping */
if (ptrace_cancel_bpt(current))
@@ -1382,14 +1454,13 @@ static inline void *get_sigframe(struct emulated_sigaction *sa, CPUState *env, u
unsigned long sp;
sp = env->regwptr[UREG_FP];
-#if 0
/* This is the X/Open sanctioned signal stack switching. */
- if (sa->sa_flags & TARGET_SA_ONSTACK) {
- if (!on_sig_stack(sp) && !((current->sas_ss_sp + current->sas_ss_size) & 7))
- sp = current->sas_ss_sp + current->sas_ss_size;
+ if (sa->sa.sa_flags & TARGET_SA_ONSTACK) {
+ if (!on_sig_stack(sp)
+ && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7))
+ sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
}
-#endif
return g2h(sp - framesize);
}
@@ -1842,11 +1913,10 @@ get_sigframe(struct emulated_sigaction *ka, CPUState *regs, size_t frame_size)
*/
sp -= 32;
-#if 0
/* This is the X/Open sanctioned signal stack switching. */
- if ((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags (sp) == 0))
- sp = current->sas_ss_sp + current->sas_ss_size;
-#endif
+ if ((ka->sa.sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
+ sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
+ }
return g2h((sp - frame_size) & ~7);
}
diff --git a/linux-user/sparc/target_signal.h b/linux-user/sparc/target_signal.h
new file mode 100644
index 0000000000..bf54ac71d8
--- /dev/null
+++ b/linux-user/sparc/target_signal.h
@@ -0,0 +1,24 @@
+#ifndef TARGET_SIGNAL_H
+#define TARGET_SIGNAL_H
+
+#include "cpu.h"
+
+/* this struct defines a stack used during syscall handling */
+
+typedef struct target_sigaltstack {
+ target_ulong ss_sp;
+ target_long ss_flags;
+ target_ulong ss_size;
+} target_stack_t;
+
+
+/*
+ * sigaltstack controls
+ */
+#define TARGET_SS_ONSTACK 1
+#define TARGET_SS_DISABLE 2
+
+#define TARGET_MINSIGSTKSZ 4096
+#define TARGET_SIGSTKSZ 16384
+
+#endif /* TARGET_SIGNAL_H */
diff --git a/linux-user/sparc64/target_signal.h b/linux-user/sparc64/target_signal.h
new file mode 100644
index 0000000000..bf54ac71d8
--- /dev/null
+++ b/linux-user/sparc64/target_signal.h
@@ -0,0 +1,24 @@
+#ifndef TARGET_SIGNAL_H
+#define TARGET_SIGNAL_H
+
+#include "cpu.h"
+
+/* this struct defines a stack used during syscall handling */
+
+typedef struct target_sigaltstack {
+ target_ulong ss_sp;
+ target_long ss_flags;
+ target_ulong ss_size;
+} target_stack_t;
+
+
+/*
+ * sigaltstack controls
+ */
+#define TARGET_SS_ONSTACK 1
+#define TARGET_SS_DISABLE 2
+
+#define TARGET_MINSIGSTKSZ 4096
+#define TARGET_SIGSTKSZ 16384
+
+#endif /* TARGET_SIGNAL_H */
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 41d58da14f..5f1c804aaa 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -4318,7 +4318,14 @@ target_long do_syscall(void *cpu_env, int num, target_long arg1,
case TARGET_NR_capset:
goto unimplemented;
case TARGET_NR_sigaltstack:
+#if defined(TARGET_I386) || defined(TARGET_ARM) || defined(TARGET_SPARC)
+ ret = do_sigaltstack((struct target_sigaltstack *)arg1,
+ (struct target_sigaltstack *)arg2,
+ get_sp_from_cpustate((CPUState *)cpu_env));
+ break;
+#else
goto unimplemented;
+#endif
case TARGET_NR_sendfile:
goto unimplemented;
#ifdef TARGET_NR_getpmsg
diff --git a/linux-user/x86_64/target_signal.h b/linux-user/x86_64/target_signal.h
new file mode 100644
index 0000000000..eb4a0bb12c
--- /dev/null
+++ b/linux-user/x86_64/target_signal.h
@@ -0,0 +1,24 @@
+#ifndef TARGET_SIGNAL_H
+#define TARGET_SIGNAL_H
+
+#include "cpu.h"
+
+/* this struct defines a stack used during syscall handling */
+
+typedef struct target_sigaltstack {
+ target_ulong ss_sp;
+ target_long ss_flags;
+ target_ulong ss_size;
+} target_stack_t;
+
+
+/*
+ * sigaltstack controls
+ */
+#define TARGET_SS_ONSTACK 1
+#define TARGET_SS_DISABLE 2
+
+#define TARGET_MINSIGSTKSZ 2048
+#define TARGET_SIGSTKSZ 8192
+
+#endif /* TARGET_SIGNAL_H */
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-03 13:34:35 +0000