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Commit 2983573e authored by Linus Torvalds's avatar Linus Torvalds
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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc 

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc: Allow handling signals when stack is corrupted.
parents 2da2c664 5598473a
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Showing with 468 additions and 233 deletions
arch/sparc/include/asm/sigcontext.h
View file @ 2983573e
...@@ -45,6 +45,19 @@ typedef struct { ...@@ -45,6 +45,19 @@ typedef struct {
int si_mask; int si_mask;
} __siginfo32_t; } __siginfo32_t;
#define __SIGC_MAXWIN 7
typedef struct {
unsigned long locals[8];
unsigned long ins[8];
} __siginfo_reg_window;
typedef struct {
int wsaved;
__siginfo_reg_window reg_window[__SIGC_MAXWIN];
unsigned long rwbuf_stkptrs[__SIGC_MAXWIN];
} __siginfo_rwin_t;
#ifdef CONFIG_SPARC64 #ifdef CONFIG_SPARC64
typedef struct { typedef struct {
unsigned int si_float_regs [64]; unsigned int si_float_regs [64];
...@@ -73,6 +86,7 @@ struct sigcontext { ...@@ -73,6 +86,7 @@ struct sigcontext {
unsigned long ss_size; unsigned long ss_size;
} sigc_stack; } sigc_stack;
unsigned long sigc_mask; unsigned long sigc_mask;
__siginfo_rwin_t * sigc_rwin_save;
}; };
#else #else
......
arch/sparc/kernel/Makefile
View file @ 2983573e
...@@ -32,6 +32,7 @@ obj-$(CONFIG_SPARC32) += sun4m_irq.o sun4c_irq.o sun4d_irq.o ...@@ -32,6 +32,7 @@ obj-$(CONFIG_SPARC32) += sun4m_irq.o sun4c_irq.o sun4d_irq.o
obj-y += process_$(BITS).o obj-y += process_$(BITS).o
obj-y += signal_$(BITS).o obj-y += signal_$(BITS).o
obj-y += sigutil_$(BITS).o
obj-$(CONFIG_SPARC32) += ioport.o obj-$(CONFIG_SPARC32) += ioport.o
obj-y += setup_$(BITS).o obj-y += setup_$(BITS).o
obj-y += idprom.o obj-y += idprom.o
......
arch/sparc/kernel/signal32.c
View file @ 2983573e
...@@ -29,6 +29,8 @@ ...@@ -29,6 +29,8 @@
#include <asm/visasm.h> #include <asm/visasm.h>
#include <asm/compat_signal.h> #include <asm/compat_signal.h>
#include "sigutil.h"
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
/* This magic should be in g_upper[0] for all upper parts /* This magic should be in g_upper[0] for all upper parts
...@@ -44,14 +46,14 @@ typedef struct { ...@@ -44,14 +46,14 @@ typedef struct {
struct signal_frame32 { struct signal_frame32 {
struct sparc_stackf32 ss; struct sparc_stackf32 ss;
__siginfo32_t info; __siginfo32_t info;
/* __siginfo_fpu32_t * */ u32 fpu_save; /* __siginfo_fpu_t * */ u32 fpu_save;
unsigned int insns[2]; unsigned int insns[2];
unsigned int extramask[_COMPAT_NSIG_WORDS - 1]; unsigned int extramask[_COMPAT_NSIG_WORDS - 1];
unsigned int extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */ unsigned int extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */
/* Only valid if (info.si_regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */ /* Only valid if (info.si_regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */
siginfo_extra_v8plus_t v8plus; siginfo_extra_v8plus_t v8plus;
__siginfo_fpu_t fpu_state; /* __siginfo_rwin_t * */u32 rwin_save;
}; } __attribute__((aligned(8)));
typedef struct compat_siginfo{ typedef struct compat_siginfo{
int si_signo; int si_signo;
...@@ -110,18 +112,14 @@ struct rt_signal_frame32 { ...@@ -110,18 +112,14 @@ struct rt_signal_frame32 {
compat_siginfo_t info; compat_siginfo_t info;
struct pt_regs32 regs; struct pt_regs32 regs;
compat_sigset_t mask; compat_sigset_t mask;
/* __siginfo_fpu32_t * */ u32 fpu_save; /* __siginfo_fpu_t * */ u32 fpu_save;
unsigned int insns[2]; unsigned int insns[2];
stack_t32 stack; stack_t32 stack;
unsigned int extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */ unsigned int extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */
/* Only valid if (regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */ /* Only valid if (regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */
siginfo_extra_v8plus_t v8plus; siginfo_extra_v8plus_t v8plus;
__siginfo_fpu_t fpu_state; /* __siginfo_rwin_t * */u32 rwin_save;
}; } __attribute__((aligned(8)));
/* Align macros */
#define SF_ALIGNEDSZ (((sizeof(struct signal_frame32) + 15) & (~15)))
#define RT_ALIGNEDSZ (((sizeof(struct rt_signal_frame32) + 15) & (~15)))
int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from) int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
{ {
...@@ -192,30 +190,13 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) ...@@ -192,30 +190,13 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
return 0; return 0;
} }
static int restore_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
{
unsigned long *fpregs = current_thread_info()->fpregs;
unsigned long fprs;
int err;
err = __get_user(fprs, &fpu->si_fprs);
fprs_write(0);
regs->tstate &= ~TSTATE_PEF;
if (fprs & FPRS_DL)
err |= copy_from_user(fpregs, &fpu->si_float_regs[0], (sizeof(unsigned int) * 32));
if (fprs & FPRS_DU)
err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32], (sizeof(unsigned int) * 32));
err |= __get_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
err |= __get_user(current_thread_info()->gsr[0], &fpu->si_gsr);
current_thread_info()->fpsaved[0] |= fprs;
return err;
}
void do_sigreturn32(struct pt_regs *regs) void do_sigreturn32(struct pt_regs *regs)
{ {
struct signal_frame32 __user *sf; struct signal_frame32 __user *sf;
compat_uptr_t fpu_save;
compat_uptr_t rwin_save;
unsigned int psr; unsigned int psr;
unsigned pc, npc, fpu_save; unsigned pc, npc;
sigset_t set; sigset_t set;
unsigned seta[_COMPAT_NSIG_WORDS]; unsigned seta[_COMPAT_NSIG_WORDS];
int err, i; int err, i;
...@@ -273,8 +254,13 @@ void do_sigreturn32(struct pt_regs *regs) ...@@ -273,8 +254,13 @@ void do_sigreturn32(struct pt_regs *regs)
pt_regs_clear_syscall(regs); pt_regs_clear_syscall(regs);
err |= __get_user(fpu_save, &sf->fpu_save); err |= __get_user(fpu_save, &sf->fpu_save);
if (fpu_save) if (!err && fpu_save)
err |= restore_fpu_state32(regs, &sf->fpu_state); err |= restore_fpu_state(regs, compat_ptr(fpu_save));
err |= __get_user(rwin_save, &sf->rwin_save);
if (!err && rwin_save) {
if (restore_rwin_state(compat_ptr(rwin_save)))
goto segv;
}
err |= __get_user(seta[0], &sf->info.si_mask); err |= __get_user(seta[0], &sf->info.si_mask);
err |= copy_from_user(seta+1, &sf->extramask, err |= copy_from_user(seta+1, &sf->extramask,
(_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int)); (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
...@@ -300,7 +286,9 @@ void do_sigreturn32(struct pt_regs *regs) ...@@ -300,7 +286,9 @@ void do_sigreturn32(struct pt_regs *regs)
asmlinkage void do_rt_sigreturn32(struct pt_regs *regs) asmlinkage void do_rt_sigreturn32(struct pt_regs *regs)
{ {
struct rt_signal_frame32 __user *sf; struct rt_signal_frame32 __user *sf;
unsigned int psr, pc, npc, fpu_save, u_ss_sp; unsigned int psr, pc, npc, u_ss_sp;
compat_uptr_t fpu_save;
compat_uptr_t rwin_save;
mm_segment_t old_fs; mm_segment_t old_fs;
sigset_t set; sigset_t set;
compat_sigset_t seta; compat_sigset_t seta;
...@@ -359,8 +347,8 @@ asmlinkage void do_rt_sigreturn32(struct pt_regs *regs) ...@@ -359,8 +347,8 @@ asmlinkage void do_rt_sigreturn32(struct pt_regs *regs)
pt_regs_clear_syscall(regs); pt_regs_clear_syscall(regs);
err |= __get_user(fpu_save, &sf->fpu_save); err |= __get_user(fpu_save, &sf->fpu_save);
if (fpu_save) if (!err && fpu_save)
err |= restore_fpu_state32(regs, &sf->fpu_state); err |= restore_fpu_state(regs, compat_ptr(fpu_save));
err |= copy_from_user(&seta, &sf->mask, sizeof(compat_sigset_t)); err |= copy_from_user(&seta, &sf->mask, sizeof(compat_sigset_t));
err |= __get_user(u_ss_sp, &sf->stack.ss_sp); err |= __get_user(u_ss_sp, &sf->stack.ss_sp);
st.ss_sp = compat_ptr(u_ss_sp); st.ss_sp = compat_ptr(u_ss_sp);
...@@ -376,6 +364,12 @@ asmlinkage void do_rt_sigreturn32(struct pt_regs *regs) ...@@ -376,6 +364,12 @@ asmlinkage void do_rt_sigreturn32(struct pt_regs *regs)
do_sigaltstack((stack_t __user *) &st, NULL, (unsigned long)sf); do_sigaltstack((stack_t __user *) &st, NULL, (unsigned long)sf);
set_fs(old_fs); set_fs(old_fs);
err |= __get_user(rwin_save, &sf->rwin_save);
if (!err && rwin_save) {
if (restore_rwin_state(compat_ptr(rwin_save)))
goto segv;
}
switch (_NSIG_WORDS) { switch (_NSIG_WORDS) {
case 4: set.sig[3] = seta.sig[6] + (((long)seta.sig[7]) << 32); case 4: set.sig[3] = seta.sig[6] + (((long)seta.sig[7]) << 32);
case 3: set.sig[2] = seta.sig[4] + (((long)seta.sig[5]) << 32); case 3: set.sig[2] = seta.sig[4] + (((long)seta.sig[5]) << 32);
...@@ -433,26 +427,6 @@ static void __user *get_sigframe(struct sigaction *sa, struct pt_regs *regs, uns ...@@ -433,26 +427,6 @@ static void __user *get_sigframe(struct sigaction *sa, struct pt_regs *regs, uns
return (void __user *) sp; return (void __user *) sp;
} }
static int save_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
{
unsigned long *fpregs = current_thread_info()->fpregs;
unsigned long fprs;
int err = 0;
fprs = current_thread_info()->fpsaved[0];
if (fprs & FPRS_DL)
err |= copy_to_user(&fpu->si_float_regs[0], fpregs,
(sizeof(unsigned int) * 32));
if (fprs & FPRS_DU)
err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16,
(sizeof(unsigned int) * 32));
err |= __put_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
err |= __put_user(current_thread_info()->gsr[0], &fpu->si_gsr);
err |= __put_user(fprs, &fpu->si_fprs);
return err;
}
/* The I-cache flush instruction only works in the primary ASI, which /* The I-cache flush instruction only works in the primary ASI, which
* right now is the nucleus, aka. kernel space. * right now is the nucleus, aka. kernel space.
* *
...@@ -515,18 +489,23 @@ static int setup_frame32(struct k_sigaction *ka, struct pt_regs *regs, ...@@ -515,18 +489,23 @@ static int setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
int signo, sigset_t *oldset) int signo, sigset_t *oldset)
{ {
struct signal_frame32 __user *sf; struct signal_frame32 __user *sf;
int i, err, wsaved;
void __user *tail;
int sigframe_size; int sigframe_size;
u32 psr; u32 psr;
int i, err;
unsigned int seta[_COMPAT_NSIG_WORDS]; unsigned int seta[_COMPAT_NSIG_WORDS];
/* 1. Make sure everything is clean */ /* 1. Make sure everything is clean */
synchronize_user_stack(); synchronize_user_stack();
save_and_clear_fpu(); save_and_clear_fpu();
sigframe_size = SF_ALIGNEDSZ; wsaved = get_thread_wsaved();
if (!(current_thread_info()->fpsaved[0] & FPRS_FEF))
sigframe_size -= sizeof(__siginfo_fpu_t); sigframe_size = sizeof(*sf);
if (current_thread_info()->fpsaved[0] & FPRS_FEF)
sigframe_size += sizeof(__siginfo_fpu_t);
if (wsaved)
sigframe_size += sizeof(__siginfo_rwin_t);
sf = (struct signal_frame32 __user *) sf = (struct signal_frame32 __user *)
get_sigframe(&ka->sa, regs, sigframe_size); get_sigframe(&ka->sa, regs, sigframe_size);
...@@ -534,8 +513,7 @@ static int setup_frame32(struct k_sigaction *ka, struct pt_regs *regs, ...@@ -534,8 +513,7 @@ static int setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
if (invalid_frame_pointer(sf, sigframe_size)) if (invalid_frame_pointer(sf, sigframe_size))
goto sigill; goto sigill;
if (get_thread_wsaved() != 0) tail = (sf + 1);
goto sigill;
/* 2. Save the current process state */ /* 2. Save the current process state */
if (test_thread_flag(TIF_32BIT)) { if (test_thread_flag(TIF_32BIT)) {
...@@ -560,11 +538,22 @@ static int setup_frame32(struct k_sigaction *ka, struct pt_regs *regs, ...@@ -560,11 +538,22 @@ static int setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
&sf->v8plus.asi); &sf->v8plus.asi);
if (psr & PSR_EF) { if (psr & PSR_EF) {
err |= save_fpu_state32(regs, &sf->fpu_state); __siginfo_fpu_t __user *fp = tail;
err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save); tail += sizeof(*fp);
err |= save_fpu_state(regs, fp);
err |= __put_user((u64)fp, &sf->fpu_save);
} else { } else {
err |= __put_user(0, &sf->fpu_save); err |= __put_user(0, &sf->fpu_save);
} }
if (wsaved) {
__siginfo_rwin_t __user *rwp = tail;
tail += sizeof(*rwp);
err |= save_rwin_state(wsaved, rwp);
err |= __put_user((u64)rwp, &sf->rwin_save);
set_thread_wsaved(0);
} else {
err |= __put_user(0, &sf->rwin_save);
}
switch (_NSIG_WORDS) { switch (_NSIG_WORDS) {
case 4: seta[7] = (oldset->sig[3] >> 32); case 4: seta[7] = (oldset->sig[3] >> 32);
...@@ -580,10 +569,21 @@ static int setup_frame32(struct k_sigaction *ka, struct pt_regs *regs, ...@@ -580,10 +569,21 @@ static int setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
err |= __copy_to_user(sf->extramask, seta + 1, err |= __copy_to_user(sf->extramask, seta + 1,
(_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int)); (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
if (!wsaved) {
err |= copy_in_user((u32 __user *)sf, err |= copy_in_user((u32 __user *)sf,
(u32 __user *)(regs->u_regs[UREG_FP]), (u32 __user *)(regs->u_regs[UREG_FP]),
sizeof(struct reg_window32)); sizeof(struct reg_window32));
} else {
struct reg_window *rp;
rp = &current_thread_info()->reg_window[wsaved - 1];
for (i = 0; i < 8; i++)
err |= __put_user(rp->locals[i], &sf->ss.locals[i]);
for (i = 0; i < 6; i++)
err |= __put_user(rp->ins[i], &sf->ss.ins[i]);
err |= __put_user(rp->ins[6], &sf->ss.fp);
err |= __put_user(rp->ins[7], &sf->ss.callers_pc);
}
if (err) if (err)
goto sigsegv; goto sigsegv;
...@@ -613,7 +613,6 @@ static int setup_frame32(struct k_sigaction *ka, struct pt_regs *regs, ...@@ -613,7 +613,6 @@ static int setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
err |= __put_user(0x91d02010, &sf->insns[1]); /*t 0x10*/ err |= __put_user(0x91d02010, &sf->insns[1]); /*t 0x10*/
if (err) if (err)
goto sigsegv; goto sigsegv;
flush_signal_insns(address); flush_signal_insns(address);
} }
return 0; return 0;
...@@ -632,18 +631,23 @@ static int setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs, ...@@ -632,18 +631,23 @@ static int setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
siginfo_t *info) siginfo_t *info)
{ {
struct rt_signal_frame32 __user *sf; struct rt_signal_frame32 __user *sf;
int i, err, wsaved;
void __user *tail;
int sigframe_size; int sigframe_size;
u32 psr; u32 psr;
int i, err;
compat_sigset_t seta; compat_sigset_t seta;
/* 1. Make sure everything is clean */ /* 1. Make sure everything is clean */
synchronize_user_stack(); synchronize_user_stack();
save_and_clear_fpu(); save_and_clear_fpu();
sigframe_size = RT_ALIGNEDSZ; wsaved = get_thread_wsaved();
if (!(current_thread_info()->fpsaved[0] & FPRS_FEF))
sigframe_size -= sizeof(__siginfo_fpu_t); sigframe_size = sizeof(*sf);
if (current_thread_info()->fpsaved[0] & FPRS_FEF)
sigframe_size += sizeof(__siginfo_fpu_t);
if (wsaved)
sigframe_size += sizeof(__siginfo_rwin_t);
sf = (struct rt_signal_frame32 __user *) sf = (struct rt_signal_frame32 __user *)
get_sigframe(&ka->sa, regs, sigframe_size); get_sigframe(&ka->sa, regs, sigframe_size);
...@@ -651,8 +655,7 @@ static int setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs, ...@@ -651,8 +655,7 @@ static int setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
if (invalid_frame_pointer(sf, sigframe_size)) if (invalid_frame_pointer(sf, sigframe_size))
goto sigill; goto sigill;
if (get_thread_wsaved() != 0) tail = (sf + 1);
goto sigill;
/* 2. Save the current process state */ /* 2. Save the current process state */
if (test_thread_flag(TIF_32BIT)) { if (test_thread_flag(TIF_32BIT)) {
...@@ -677,11 +680,22 @@ static int setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs, ...@@ -677,11 +680,22 @@ static int setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
&sf->v8plus.asi); &sf->v8plus.asi);
if (psr & PSR_EF) { if (psr & PSR_EF) {
err |= save_fpu_state32(regs, &sf->fpu_state); __siginfo_fpu_t __user *fp = tail;
err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save); tail += sizeof(*fp);
err |= save_fpu_state(regs, fp);
err |= __put_user((u64)fp, &sf->fpu_save);
} else { } else {
err |= __put_user(0, &sf->fpu_save); err |= __put_user(0, &sf->fpu_save);
} }
if (wsaved) {
__siginfo_rwin_t __user *rwp = tail;
tail += sizeof(*rwp);
err |= save_rwin_state(wsaved, rwp);
err |= __put_user((u64)rwp, &sf->rwin_save);
set_thread_wsaved(0);
} else {
err |= __put_user(0, &sf->rwin_save);
}
/* Update the siginfo structure. */ /* Update the siginfo structure. */
err |= copy_siginfo_to_user32(&sf->info, info); err |= copy_siginfo_to_user32(&sf->info, info);
...@@ -703,9 +717,21 @@ static int setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs, ...@@ -703,9 +717,21 @@ static int setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
} }
err |= __copy_to_user(&sf->mask, &seta, sizeof(compat_sigset_t)); err |= __copy_to_user(&sf->mask, &seta, sizeof(compat_sigset_t));
if (!wsaved) {
err |= copy_in_user((u32 __user *)sf, err |= copy_in_user((u32 __user *)sf,
(u32 __user *)(regs->u_regs[UREG_FP]), (u32 __user *)(regs->u_regs[UREG_FP]),
sizeof(struct reg_window32)); sizeof(struct reg_window32));
} else {
struct reg_window *rp;
rp = &current_thread_info()->reg_window[wsaved - 1];
for (i = 0; i < 8; i++)
err |= __put_user(rp->locals[i], &sf->ss.locals[i]);
for (i = 0; i < 6; i++)
err |= __put_user(rp->ins[i], &sf->ss.ins[i]);
err |= __put_user(rp->ins[6], &sf->ss.fp);
err |= __put_user(rp->ins[7], &sf->ss.callers_pc);
}
if (err) if (err)
goto sigsegv; goto sigsegv;
......
arch/sparc/kernel/signal_32.c
View file @ 2983573e
...@@ -26,6 +26,8 @@ ...@@ -26,6 +26,8 @@
#include <asm/pgtable.h> #include <asm/pgtable.h>
#include <asm/cacheflush.h> /* flush_sig_insns */ #include <asm/cacheflush.h> /* flush_sig_insns */
#include "sigutil.h"
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
extern void fpsave(unsigned long *fpregs, unsigned long *fsr, extern void fpsave(unsigned long *fpregs, unsigned long *fsr,
...@@ -39,8 +41,8 @@ struct signal_frame { ...@@ -39,8 +41,8 @@ struct signal_frame {
unsigned long insns[2] __attribute__ ((aligned (8))); unsigned long insns[2] __attribute__ ((aligned (8)));
unsigned int extramask[_NSIG_WORDS - 1]; unsigned int extramask[_NSIG_WORDS - 1];
unsigned int extra_size; /* Should be 0 */ unsigned int extra_size; /* Should be 0 */
__siginfo_fpu_t fpu_state; __siginfo_rwin_t __user *rwin_save;
}; } __attribute__((aligned(8)));
struct rt_signal_frame { struct rt_signal_frame {
struct sparc_stackf ss; struct sparc_stackf ss;
...@@ -51,8 +53,8 @@ struct rt_signal_frame { ...@@ -51,8 +53,8 @@ struct rt_signal_frame {
unsigned int insns[2]; unsigned int insns[2];
stack_t stack; stack_t stack;
unsigned int extra_size; /* Should be 0 */ unsigned int extra_size; /* Should be 0 */
__siginfo_fpu_t fpu_state; __siginfo_rwin_t __user *rwin_save;
}; } __attribute__((aligned(8)));
/* Align macros */ /* Align macros */
#define SF_ALIGNEDSZ (((sizeof(struct signal_frame) + 7) & (~7))) #define SF_ALIGNEDSZ (((sizeof(struct signal_frame) + 7) & (~7)))
...@@ -79,43 +81,13 @@ asmlinkage int sys_sigsuspend(old_sigset_t set) ...@@ -79,43 +81,13 @@ asmlinkage int sys_sigsuspend(old_sigset_t set)
return _sigpause_common(set); return _sigpause_common(set);
} }
static inline int
restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
{
int err;
#ifdef CONFIG_SMP
if (test_tsk_thread_flag(current, TIF_USEDFPU))
regs->psr &= ~PSR_EF;
#else
if (current == last_task_used_math) {
last_task_used_math = NULL;
regs->psr &= ~PSR_EF;
}
#endif
set_used_math();
clear_tsk_thread_flag(current, TIF_USEDFPU);
if (!access_ok(VERIFY_READ, fpu, sizeof(*fpu)))
return -EFAULT;
err = __copy_from_user(&current->thread.float_regs[0], &fpu->si_float_regs[0],
(sizeof(unsigned long) * 32));
err |= __get_user(current->thread.fsr, &fpu->si_fsr);
err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
if (current->thread.fpqdepth != 0)
err |= __copy_from_user(&current->thread.fpqueue[0],
&fpu->si_fpqueue[0],
((sizeof(unsigned long) +
(sizeof(unsigned long *)))*16));
return err;
}
asmlinkage void do_sigreturn(struct pt_regs *regs) asmlinkage void do_sigreturn(struct pt_regs *regs)
{ {
struct signal_frame __user *sf; struct signal_frame __user *sf;
unsigned long up_psr, pc, npc; unsigned long up_psr, pc, npc;
sigset_t set; sigset_t set;
__siginfo_fpu_t __user *fpu_save; __siginfo_fpu_t __user *fpu_save;
__siginfo_rwin_t __user *rwin_save;
int err; int err;
/* Always make any pending restarted system calls return -EINTR */ /* Always make any pending restarted system calls return -EINTR */
...@@ -150,9 +122,11 @@ asmlinkage void do_sigreturn(struct pt_regs *regs) ...@@ -150,9 +122,11 @@ asmlinkage void do_sigreturn(struct pt_regs *regs)
pt_regs_clear_syscall(regs); pt_regs_clear_syscall(regs);
err |= __get_user(fpu_save, &sf->fpu_save); err |= __get_user(fpu_save, &sf->fpu_save);
if (fpu_save) if (fpu_save)
err |= restore_fpu_state(regs, fpu_save); err |= restore_fpu_state(regs, fpu_save);
err |= __get_user(rwin_save, &sf->rwin_save);
if (rwin_save)
err |= restore_rwin_state(rwin_save);
/* This is pretty much atomic, no amount locking would prevent /* This is pretty much atomic, no amount locking would prevent
* the races which exist anyways. * the races which exist anyways.
...@@ -180,6 +154,7 @@ asmlinkage void do_rt_sigreturn(struct pt_regs *regs) ...@@ -180,6 +154,7 @@ asmlinkage void do_rt_sigreturn(struct pt_regs *regs)
struct rt_signal_frame __user *sf; struct rt_signal_frame __user *sf;
unsigned int psr, pc, npc; unsigned int psr, pc, npc;
__siginfo_fpu_t __user *fpu_save; __siginfo_fpu_t __user *fpu_save;
__siginfo_rwin_t __user *rwin_save;
mm_segment_t old_fs; mm_segment_t old_fs;
sigset_t set; sigset_t set;
stack_t st; stack_t st;
...@@ -207,8 +182,7 @@ asmlinkage void do_rt_sigreturn(struct pt_regs *regs) ...@@ -207,8 +182,7 @@ asmlinkage void do_rt_sigreturn(struct pt_regs *regs)
pt_regs_clear_syscall(regs); pt_regs_clear_syscall(regs);
err |= __get_user(fpu_save, &sf->fpu_save); err |= __get_user(fpu_save, &sf->fpu_save);
if (!err && fpu_save)
if (fpu_save)
err |= restore_fpu_state(regs, fpu_save); err |= restore_fpu_state(regs, fpu_save);
err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t)); err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t));
...@@ -228,6 +202,12 @@ asmlinkage void do_rt_sigreturn(struct pt_regs *regs) ...@@ -228,6 +202,12 @@ asmlinkage void do_rt_sigreturn(struct pt_regs *regs)
do_sigaltstack((const stack_t __user *) &st, NULL, (unsigned long)sf); do_sigaltstack((const stack_t __user *) &st, NULL, (unsigned long)sf);
set_fs(old_fs); set_fs(old_fs);
err |= __get_user(rwin_save, &sf->rwin_save);
if (!err && rwin_save) {
if (restore_rwin_state(rwin_save))
goto segv;
}
sigdelsetmask(&set, ~_BLOCKABLE); sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock); spin_lock_irq(&current->sighand->siglock);
current->blocked = set; current->blocked = set;
...@@ -280,53 +260,23 @@ static inline void __user *get_sigframe(struct sigaction *sa, struct pt_regs *re ...@@ -280,53 +260,23 @@ static inline void __user *get_sigframe(struct sigaction *sa, struct pt_regs *re
return (void __user *) sp; return (void __user *) sp;
} }
static inline int
save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
{
int err = 0;
#ifdef CONFIG_SMP
if (test_tsk_thread_flag(current, TIF_USEDFPU)) {
put_psr(get_psr() | PSR_EF);
fpsave(&current->thread.float_regs[0], &current->thread.fsr,
&current->thread.fpqueue[0], &current->thread.fpqdepth);
regs->psr &= ~(PSR_EF);
clear_tsk_thread_flag(current, TIF_USEDFPU);
}
#else
if (current == last_task_used_math) {
put_psr(get_psr() | PSR_EF);
fpsave(&current->thread.float_regs[0], &current->thread.fsr,
&current->thread.fpqueue[0], &current->thread.fpqdepth);
last_task_used_math = NULL;
regs->psr &= ~(PSR_EF);
}
#endif
err |= __copy_to_user(&fpu->si_float_regs[0],
&current->thread.float_regs[0],
(sizeof(unsigned long) * 32));
err |= __put_user(current->thread.fsr, &fpu->si_fsr);
err |= __put_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
if (current->thread.fpqdepth != 0)
err |= __copy_to_user(&fpu->si_fpqueue[0],
&current->thread.fpqueue[0],
((sizeof(unsigned long) +
(sizeof(unsigned long *)))*16));
clear_used_math();
return err;
}
static int setup_frame(struct k_sigaction *ka, struct pt_regs *regs, static int setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
int signo, sigset_t *oldset) int signo, sigset_t *oldset)
{ {
struct signal_frame __user *sf; struct signal_frame __user *sf;
int sigframe_size, err; int sigframe_size, err, wsaved;
void __user *tail;
/* 1. Make sure everything is clean */ /* 1. Make sure everything is clean */
synchronize_user_stack(); synchronize_user_stack();
sigframe_size = SF_ALIGNEDSZ; wsaved = current_thread_info()->w_saved;
if (!used_math())
sigframe_size -= sizeof(__siginfo_fpu_t); sigframe_size = sizeof(*sf);
if (used_math())
sigframe_size += sizeof(__siginfo_fpu_t);
if (wsaved)
sigframe_size += sizeof(__siginfo_rwin_t);
sf = (struct signal_frame __user *) sf = (struct signal_frame __user *)
get_sigframe(&ka->sa, regs, sigframe_size); get_sigframe(&ka->sa, regs, sigframe_size);
...@@ -334,8 +284,7 @@ static int setup_frame(struct k_sigaction *ka, struct pt_regs *regs, ...@@ -334,8 +284,7 @@ static int setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
if (invalid_frame_pointer(sf, sigframe_size)) if (invalid_frame_pointer(sf, sigframe_size))
goto sigill_and_return; goto sigill_and_return;
if (current_thread_info()->w_saved != 0) tail = sf + 1;
goto sigill_and_return;
/* 2. Save the current process state */ /* 2. Save the current process state */
err = __copy_to_user(&sf->info.si_regs, regs, sizeof(struct pt_regs)); err = __copy_to_user(&sf->info.si_regs, regs, sizeof(struct pt_regs));
...@@ -343,17 +292,34 @@ static int setup_frame(struct k_sigaction *ka, struct pt_regs *regs, ...@@ -343,17 +292,34 @@ static int setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
err |= __put_user(0, &sf->extra_size); err |= __put_user(0, &sf->extra_size);
if (used_math()) { if (used_math()) {
err |= save_fpu_state(regs, &sf->fpu_state); __siginfo_fpu_t __user *fp = tail;
err |= __put_user(&sf->fpu_state, &sf->fpu_save); tail += sizeof(*fp);
err |= save_fpu_state(regs, fp);
err |= __put_user(fp, &sf->fpu_save);
} else { } else {
err |= __put_user(0, &sf->fpu_save); err |= __put_user(0, &sf->fpu_save);
} }
if (wsaved) {
__siginfo_rwin_t __user *rwp = tail;
tail += sizeof(*rwp);
err |= save_rwin_state(wsaved, rwp);
err |= __put_user(rwp, &sf->rwin_save);
} else {
err |= __put_user(0, &sf->rwin_save);
}
err |= __put_user(oldset->sig[0], &sf->info.si_mask); err |= __put_user(oldset->sig[0], &sf->info.si_mask);
err |= __copy_to_user(sf->extramask, &oldset->sig[1], err |= __copy_to_user(sf->extramask, &oldset->sig[1],
(_NSIG_WORDS - 1) * sizeof(unsigned int)); (_NSIG_WORDS - 1) * sizeof(unsigned int));
if (!wsaved) {
err |= __copy_to_user(sf, (char *) regs->u_regs[UREG_FP], err |= __copy_to_user(sf, (char *) regs->u_regs[UREG_FP],
sizeof(struct reg_window32)); sizeof(struct reg_window32));
} else {
struct reg_window32 *rp;
rp = &current_thread_info()->reg_window[wsaved - 1];
err |= __copy_to_user(sf, rp, sizeof(struct reg_window32));
}
if (err) if (err)
goto sigsegv; goto sigsegv;
...@@ -399,21 +365,24 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs, ...@@ -399,21 +365,24 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
int signo, sigset_t *oldset, siginfo_t *info) int signo, sigset_t *oldset, siginfo_t *info)
{ {
struct rt_signal_frame __user *sf; struct rt_signal_frame __user *sf;
int sigframe_size; int sigframe_size, wsaved;
void __user *tail;
unsigned int psr; unsigned int psr;
int err; int err;
synchronize_user_stack(); synchronize_user_stack();
sigframe_size = RT_ALIGNEDSZ; wsaved = current_thread_info()->w_saved;
if (!used_math()) sigframe_size = sizeof(*sf);
sigframe_size -= sizeof(__siginfo_fpu_t); if (used_math())
sigframe_size += sizeof(__siginfo_fpu_t);
if (wsaved)
sigframe_size += sizeof(__siginfo_rwin_t);
sf = (struct rt_signal_frame __user *) sf = (struct rt_signal_frame __user *)
get_sigframe(&ka->sa, regs, sigframe_size); get_sigframe(&ka->sa, regs, sigframe_size);
if (invalid_frame_pointer(sf, sigframe_size)) if (invalid_frame_pointer(sf, sigframe_size))
goto sigill; goto sigill;
if (current_thread_info()->w_saved != 0)
goto sigill;
tail = sf + 1;
err = __put_user(regs->pc, &sf->regs.pc); err = __put_user(regs->pc, &sf->regs.pc);
err |= __put_user(regs->npc, &sf->regs.npc); err |= __put_user(regs->npc, &sf->regs.npc);
err |= __put_user(regs->y, &sf->regs.y); err |= __put_user(regs->y, &sf->regs.y);
...@@ -425,11 +394,21 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs, ...@@ -425,11 +394,21 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
err |= __put_user(0, &sf->extra_size); err |= __put_user(0, &sf->extra_size);
if (psr & PSR_EF) { if (psr & PSR_EF) {
err |= save_fpu_state(regs, &sf->fpu_state); __siginfo_fpu_t *fp = tail;
err |= __put_user(&sf->fpu_state, &sf->fpu_save); tail += sizeof(*fp);
err |= save_fpu_state(regs, fp);
err |= __put_user(fp, &sf->fpu_save);
} else { } else {
err |= __put_user(0, &sf->fpu_save); err |= __put_user(0, &sf->fpu_save);
} }
if (wsaved) {
__siginfo_rwin_t *rwp = tail;
tail += sizeof(*rwp);
err |= save_rwin_state(wsaved, rwp);
err |= __put_user(rwp, &sf->rwin_save);
} else {
err |= __put_user(0, &sf->rwin_save);
}
err |= __copy_to_user(&sf->mask, &oldset->sig[0], sizeof(sigset_t)); err |= __copy_to_user(&sf->mask, &oldset->sig[0], sizeof(sigset_t));
/* Setup sigaltstack */ /* Setup sigaltstack */
...@@ -437,8 +416,15 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs, ...@@ -437,8 +416,15 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags); err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags);
err |= __put_user(current->sas_ss_size, &sf->stack.ss_size); err |= __put_user(current->sas_ss_size, &sf->stack.ss_size);
if (!wsaved) {
err |= __copy_to_user(sf, (char *) regs->u_regs[UREG_FP], err |= __copy_to_user(sf, (char *) regs->u_regs[UREG_FP],
sizeof(struct reg_window32)); sizeof(struct reg_window32));
} else {
struct reg_window32 *rp;
rp = &current_thread_info()->reg_window[wsaved - 1];
err |= __copy_to_user(sf, rp, sizeof(struct reg_window32));
}
err |= copy_siginfo_to_user(&sf->info, info); err |= copy_siginfo_to_user(&sf->info, info);
......
arch/sparc/kernel/signal_64.c
View file @ 2983573e
...@@ -34,6 +34,7 @@ ...@@ -34,6 +34,7 @@
#include "entry.h" #include "entry.h"
#include "systbls.h" #include "systbls.h"
#include "sigutil.h"
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
...@@ -236,7 +237,7 @@ struct rt_signal_frame { ...@@ -236,7 +237,7 @@ struct rt_signal_frame {
__siginfo_fpu_t __user *fpu_save; __siginfo_fpu_t __user *fpu_save;
stack_t stack; stack_t stack;
sigset_t mask; sigset_t mask;
__siginfo_fpu_t fpu_state; __siginfo_rwin_t *rwin_save;
}; };
static long _sigpause_common(old_sigset_t set) static long _sigpause_common(old_sigset_t set)
...@@ -266,33 +267,12 @@ asmlinkage long sys_sigsuspend(old_sigset_t set) ...@@ -266,33 +267,12 @@ asmlinkage long sys_sigsuspend(old_sigset_t set)
return _sigpause_common(set); return _sigpause_common(set);
} }
static inline int
restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
{
unsigned long *fpregs = current_thread_info()->fpregs;
unsigned long fprs;
int err;
err = __get_user(fprs, &fpu->si_fprs);
fprs_write(0);
regs->tstate &= ~TSTATE_PEF;
if (fprs & FPRS_DL)
err |= copy_from_user(fpregs, &fpu->si_float_regs[0],
(sizeof(unsigned int) * 32));
if (fprs & FPRS_DU)
err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32],
(sizeof(unsigned int) * 32));
err |= __get_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
err |= __get_user(current_thread_info()->gsr[0], &fpu->si_gsr);
current_thread_info()->fpsaved[0] |= fprs;
return err;
}
void do_rt_sigreturn(struct pt_regs *regs) void do_rt_sigreturn(struct pt_regs *regs)
{ {
struct rt_signal_frame __user *sf; struct rt_signal_frame __user *sf;
unsigned long tpc, tnpc, tstate; unsigned long tpc, tnpc, tstate;
__siginfo_fpu_t __user *fpu_save; __siginfo_fpu_t __user *fpu_save;
__siginfo_rwin_t __user *rwin_save;
sigset_t set; sigset_t set;
int err; int err;
...@@ -325,8 +305,8 @@ void do_rt_sigreturn(struct pt_regs *regs) ...@@ -325,8 +305,8 @@ void do_rt_sigreturn(struct pt_regs *regs)
regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC)); regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC));
err |= __get_user(fpu_save, &sf->fpu_save); err |= __get_user(fpu_save, &sf->fpu_save);
if (fpu_save) if (!err && fpu_save)
err |= restore_fpu_state(regs, &sf->fpu_state); err |= restore_fpu_state(regs, fpu_save);
err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t)); err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t));
err |= do_sigaltstack(&sf->stack, NULL, (unsigned long)sf); err |= do_sigaltstack(&sf->stack, NULL, (unsigned long)sf);
...@@ -334,6 +314,12 @@ void do_rt_sigreturn(struct pt_regs *regs) ...@@ -334,6 +314,12 @@ void do_rt_sigreturn(struct pt_regs *regs)
if (err) if (err)
goto segv; goto segv;
err |= __get_user(rwin_save, &sf->rwin_save);
if (!err && rwin_save) {
if (restore_rwin_state(rwin_save))
goto segv;
}
regs->tpc = tpc; regs->tpc = tpc;
regs->tnpc = tnpc; regs->tnpc = tnpc;
...@@ -351,34 +337,13 @@ void do_rt_sigreturn(struct pt_regs *regs) ...@@ -351,34 +337,13 @@ void do_rt_sigreturn(struct pt_regs *regs)
} }
/* Checks if the fp is valid */ /* Checks if the fp is valid */
static int invalid_frame_pointer(void __user *fp, int fplen) static int invalid_frame_pointer(void __user *fp)
{ {
if (((unsigned long) fp) & 15) if (((unsigned long) fp) & 15)
return 1; return 1;
return 0; return 0;
} }
static inline int
save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
{
unsigned long *fpregs = current_thread_info()->fpregs;
unsigned long fprs;
int err = 0;
fprs = current_thread_info()->fpsaved[0];
if (fprs & FPRS_DL)
err |= copy_to_user(&fpu->si_float_regs[0], fpregs,
(sizeof(unsigned int) * 32));
if (fprs & FPRS_DU)
err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16,
(sizeof(unsigned int) * 32));
err |= __put_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
err |= __put_user(current_thread_info()->gsr[0], &fpu->si_gsr);
err |= __put_user(fprs, &fpu->si_fprs);
return err;
}
static inline void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, unsigned long framesize) static inline void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, unsigned long framesize)
{ {
unsigned long sp = regs->u_regs[UREG_FP] + STACK_BIAS; unsigned long sp = regs->u_regs[UREG_FP] + STACK_BIAS;
...@@ -414,34 +379,48 @@ setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs, ...@@ -414,34 +379,48 @@ setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
int signo, sigset_t *oldset, siginfo_t *info) int signo, sigset_t *oldset, siginfo_t *info)
{ {
struct rt_signal_frame __user *sf; struct rt_signal_frame __user *sf;
int sigframe_size, err; int wsaved, err, sf_size;
void __user *tail;
/* 1. Make sure everything is clean */ /* 1. Make sure everything is clean */
synchronize_user_stack(); synchronize_user_stack();
save_and_clear_fpu(); save_and_clear_fpu();
sigframe_size = sizeof(struct rt_signal_frame); wsaved = get_thread_wsaved();
if (!(current_thread_info()->fpsaved[0] & FPRS_FEF))
sigframe_size -= sizeof(__siginfo_fpu_t);
sf_size = sizeof(struct rt_signal_frame);
if (current_thread_info()->fpsaved[0] & FPRS_FEF)
sf_size += sizeof(__siginfo_fpu_t);
if (wsaved)
sf_size += sizeof(__siginfo_rwin_t);
sf = (struct rt_signal_frame __user *) sf = (struct rt_signal_frame __user *)
get_sigframe(ka, regs, sigframe_size); get_sigframe(ka, regs, sf_size);
if (invalid_frame_pointer (sf, sigframe_size)) if (invalid_frame_pointer (sf))
goto sigill; goto sigill;
if (get_thread_wsaved() != 0) tail = (sf + 1);
goto sigill;
/* 2. Save the current process state */ /* 2. Save the current process state */
err = copy_to_user(&sf->regs, regs, sizeof (*regs)); err = copy_to_user(&sf->regs, regs, sizeof (*regs));
if (current_thread_info()->fpsaved[0] & FPRS_FEF) { if (current_thread_info()->fpsaved[0] & FPRS_FEF) {
err |= save_fpu_state(regs, &sf->fpu_state); __siginfo_fpu_t __user *fpu_save = tail;
err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save); tail += sizeof(__siginfo_fpu_t);
err |= save_fpu_state(regs, fpu_save);
err |= __put_user((u64)fpu_save, &sf->fpu_save);
} else { } else {
err |= __put_user(0, &sf->fpu_save); err |= __put_user(0, &sf->fpu_save);
} }
if (wsaved) {
__siginfo_rwin_t __user *rwin_save = tail;
tail += sizeof(__siginfo_rwin_t);
err |= save_rwin_state(wsaved, rwin_save);
err |= __put_user((u64)rwin_save, &sf->rwin_save);
set_thread_wsaved(0);
} else {
err |= __put_user(0, &sf->rwin_save);
}
/* Setup sigaltstack */ /* Setup sigaltstack */
err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp); err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp);
...@@ -450,10 +429,17 @@ setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs, ...@@ -450,10 +429,17 @@ setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
err |= copy_to_user(&sf->mask, oldset, sizeof(sigset_t)); err |= copy_to_user(&sf->mask, oldset, sizeof(sigset_t));
if (!wsaved) {
err |= copy_in_user((u64 __user *)sf, err |= copy_in_user((u64 __user *)sf,
(u64 __user *)(regs->u_regs[UREG_FP]+STACK_BIAS), (u64 __user *)(regs->u_regs[UREG_FP] +
STACK_BIAS),
sizeof(struct reg_window)); sizeof(struct reg_window));
} else {
struct reg_window *rp;
rp = &current_thread_info()->reg_window[wsaved - 1];
err |= copy_to_user(sf, rp, sizeof(struct reg_window));
}
if (info) if (info)
err |= copy_siginfo_to_user(&sf->info, info); err |= copy_siginfo_to_user(&sf->info, info);
else { else {
......
arch/sparc/kernel/sigutil.h 0 → 100644
View file @ 2983573e
#ifndef _SIGUTIL_H
#define _SIGUTIL_H
int save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu);
int restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu);
int save_rwin_state(int wsaved, __siginfo_rwin_t __user *rwin);
int restore_rwin_state(__siginfo_rwin_t __user *rp);
#endif /* _SIGUTIL_H */
arch/sparc/kernel/sigutil_32.c 0 → 100644
View file @ 2983573e
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/thread_info.h>
#include <linux/uaccess.h>
#include <linux/sched.h>
#include <asm/sigcontext.h>
#include <asm/fpumacro.h>
#include <asm/ptrace.h>
#include "sigutil.h"
int save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
{
int err = 0;
#ifdef CONFIG_SMP
if (test_tsk_thread_flag(current, TIF_USEDFPU)) {
put_psr(get_psr() | PSR_EF);
fpsave(&current->thread.float_regs[0], &current->thread.fsr,
&current->thread.fpqueue[0], &current->thread.fpqdepth);
regs->psr &= ~(PSR_EF);
clear_tsk_thread_flag(current, TIF_USEDFPU);
}
#else
if (current == last_task_used_math) {
put_psr(get_psr() | PSR_EF);
fpsave(&current->thread.float_regs[0], &current->thread.fsr,
&current->thread.fpqueue[0], &current->thread.fpqdepth);
last_task_used_math = NULL;
regs->psr &= ~(PSR_EF);
}
#endif
err |= __copy_to_user(&fpu->si_float_regs[0],
&current->thread.float_regs[0],
(sizeof(unsigned long) * 32));
err |= __put_user(current->thread.fsr, &fpu->si_fsr);
err |= __put_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
if (current->thread.fpqdepth != 0)
err |= __copy_to_user(&fpu->si_fpqueue[0],
&current->thread.fpqueue[0],
((sizeof(unsigned long) +
(sizeof(unsigned long *)))*16));
clear_used_math();
return err;
}
int restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
{
int err;
#ifdef CONFIG_SMP
if (test_tsk_thread_flag(current, TIF_USEDFPU))
regs->psr &= ~PSR_EF;
#else
if (current == last_task_used_math) {
last_task_used_math = NULL;
regs->psr &= ~PSR_EF;
}
#endif
set_used_math();
clear_tsk_thread_flag(current, TIF_USEDFPU);
if (!access_ok(VERIFY_READ, fpu, sizeof(*fpu)))
return -EFAULT;
err = __copy_from_user(&current->thread.float_regs[0], &fpu->si_float_regs[0],
(sizeof(unsigned long) * 32));
err |= __get_user(current->thread.fsr, &fpu->si_fsr);
err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
if (current->thread.fpqdepth != 0)
err |= __copy_from_user(&current->thread.fpqueue[0],
&fpu->si_fpqueue[0],
((sizeof(unsigned long) +
(sizeof(unsigned long *)))*16));
return err;
}
int save_rwin_state(int wsaved, __siginfo_rwin_t __user *rwin)
{
int i, err = __put_user(wsaved, &rwin->wsaved);
for (i = 0; i < wsaved; i++) {
struct reg_window32 *rp;
unsigned long fp;
rp = &current_thread_info()->reg_window[i];
fp = current_thread_info()->rwbuf_stkptrs[i];
err |= copy_to_user(&rwin->reg_window[i], rp,
sizeof(struct reg_window32));
err |= __put_user(fp, &rwin->rwbuf_stkptrs[i]);
}
return err;
}
int restore_rwin_state(__siginfo_rwin_t __user *rp)
{
struct thread_info *t = current_thread_info();
int i, wsaved, err;
__get_user(wsaved, &rp->wsaved);
if (wsaved > NSWINS)
return -EFAULT;
err = 0;
for (i = 0; i < wsaved; i++) {
err |= copy_from_user(&t->reg_window[i],
&rp->reg_window[i],
sizeof(struct reg_window32));
err |= __get_user(t->rwbuf_stkptrs[i],
&rp->rwbuf_stkptrs[i]);
}
if (err)
return err;
t->w_saved = wsaved;
synchronize_user_stack();
if (t->w_saved)
return -EFAULT;
return 0;
}
arch/sparc/kernel/sigutil_64.c 0 → 100644
View file @ 2983573e
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/thread_info.h>
#include <linux/uaccess.h>
#include <asm/sigcontext.h>
#include <asm/fpumacro.h>
#include <asm/ptrace.h>
#include "sigutil.h"
int save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
{
unsigned long *fpregs = current_thread_info()->fpregs;
unsigned long fprs;
int err = 0;
fprs = current_thread_info()->fpsaved[0];
if (fprs & FPRS_DL)
err |= copy_to_user(&fpu->si_float_regs[0], fpregs,
(sizeof(unsigned int) * 32));
if (fprs & FPRS_DU)
err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16,
(sizeof(unsigned int) * 32));
err |= __put_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
err |= __put_user(current_thread_info()->gsr[0], &fpu->si_gsr);
err |= __put_user(fprs, &fpu->si_fprs);
return err;
}
int restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
{
unsigned long *fpregs = current_thread_info()->fpregs;
unsigned long fprs;
int err;
err = __get_user(fprs, &fpu->si_fprs);
fprs_write(0);
regs->tstate &= ~TSTATE_PEF;
if (fprs & FPRS_DL)
err |= copy_from_user(fpregs, &fpu->si_float_regs[0],
(sizeof(unsigned int) * 32));
if (fprs & FPRS_DU)
err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32],
(sizeof(unsigned int) * 32));
err |= __get_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
err |= __get_user(current_thread_info()->gsr[0], &fpu->si_gsr);
current_thread_info()->fpsaved[0] |= fprs;
return err;
}
int save_rwin_state(int wsaved, __siginfo_rwin_t __user *rwin)
{
int i, err = __put_user(wsaved, &rwin->wsaved);
for (i = 0; i < wsaved; i++) {
struct reg_window *rp = &current_thread_info()->reg_window[i];
unsigned long fp = current_thread_info()->rwbuf_stkptrs[i];
err |= copy_to_user(&rwin->reg_window[i], rp,
sizeof(struct reg_window));
err |= __put_user(fp, &rwin->rwbuf_stkptrs[i]);
}
return err;
}
int restore_rwin_state(__siginfo_rwin_t __user *rp)
{
struct thread_info *t = current_thread_info();
int i, wsaved, err;
__get_user(wsaved, &rp->wsaved);
if (wsaved > NSWINS)
return -EFAULT;
err = 0;
for (i = 0; i < wsaved; i++) {
err |= copy_from_user(&t->reg_window[i],
&rp->reg_window[i],
sizeof(struct reg_window));
err |= __get_user(t->rwbuf_stkptrs[i],
&rp->rwbuf_stkptrs[i]);
}
if (err)
return err;
set_thread_wsaved(wsaved);
synchronize_user_stack();
if (get_thread_wsaved())
return -EFAULT;
return 0;
}
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