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-rw-r--r--arch/mips/include/asm/fpu.h2
-rw-r--r--arch/mips/include/asm/processor.h31
-rw-r--r--arch/mips/kernel/ptrace.c39
-rw-r--r--arch/mips/kernel/ptrace32.c25
-rw-r--r--arch/mips/math-emu/cp1emu.c37
-rw-r--r--arch/mips/math-emu/kernel_linkage.c21
6 files changed, 90 insertions, 65 deletions
diff --git a/arch/mips/include/asm/fpu.h b/arch/mips/include/asm/fpu.h
index 6b9749540edf..8a3d61f0017f 100644
--- a/arch/mips/include/asm/fpu.h
+++ b/arch/mips/include/asm/fpu.h
@@ -180,7 +180,7 @@ static inline void restore_fp(struct task_struct *tsk)
_restore_fp(tsk);
}
-static inline fpureg_t *get_fpu_regs(struct task_struct *tsk)
+static inline union fpureg *get_fpu_regs(struct task_struct *tsk)
{
if (tsk == current) {
preempt_disable();
diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h
index 3605b844ad87..49a61bedf40e 100644
--- a/arch/mips/include/asm/processor.h
+++ b/arch/mips/include/asm/processor.h
@@ -96,8 +96,33 @@ extern unsigned int vced_count, vcei_count;
#define NUM_FPU_REGS 32
+#define FPU_REG_WIDTH 64
-typedef __u64 fpureg_t;
+union fpureg {
+ __u32 val32[FPU_REG_WIDTH / 32];
+ __u64 val64[FPU_REG_WIDTH / 64];
+};
+
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+# define FPR_IDX(width, idx) (idx)
+#else
+# define FPR_IDX(width, idx) ((FPU_REG_WIDTH / (width)) - 1 - (idx))
+#endif
+
+#define BUILD_FPR_ACCESS(width) \
+static inline u##width get_fpr##width(union fpureg *fpr, unsigned idx) \
+{ \
+ return fpr->val##width[FPR_IDX(width, idx)]; \
+} \
+ \
+static inline void set_fpr##width(union fpureg *fpr, unsigned idx, \
+ u##width val) \
+{ \
+ fpr->val##width[FPR_IDX(width, idx)] = val; \
+}
+
+BUILD_FPR_ACCESS(32)
+BUILD_FPR_ACCESS(64)
/*
* It would be nice to add some more fields for emulator statistics, but there
@@ -107,7 +132,7 @@ typedef __u64 fpureg_t;
*/
struct mips_fpu_struct {
- fpureg_t fpr[NUM_FPU_REGS];
+ union fpureg fpr[NUM_FPU_REGS];
unsigned int fcr31;
};
@@ -284,7 +309,7 @@ struct thread_struct {
* Saved FPU/FPU emulator stuff \
*/ \
.fpu = { \
- .fpr = {0,}, \
+ .fpr = {{{0,},},}, \
.fcr31 = 0, \
}, \
/* \
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index a17a7023d7c9..7d97709e715f 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -120,9 +120,10 @@ int ptrace_getfpregs(struct task_struct *child, __u32 __user *data)
return -EIO;
if (tsk_used_math(child)) {
- fpureg_t *fregs = get_fpu_regs(child);
+ union fpureg *fregs = get_fpu_regs(child);
for (i = 0; i < 32; i++)
- __put_user(fregs[i], i + (__u64 __user *) data);
+ __put_user(get_fpr64(&fregs[i], 0),
+ i + (__u64 __user *)data);
} else {
for (i = 0; i < 32; i++)
__put_user((__u64) -1, i + (__u64 __user *) data);
@@ -158,7 +159,8 @@ int ptrace_getfpregs(struct task_struct *child, __u32 __user *data)
int ptrace_setfpregs(struct task_struct *child, __u32 __user *data)
{
- fpureg_t *fregs;
+ union fpureg *fregs;
+ u64 fpr_val;
int i;
if (!access_ok(VERIFY_READ, data, 33 * 8))
@@ -166,8 +168,10 @@ int ptrace_setfpregs(struct task_struct *child, __u32 __user *data)
fregs = get_fpu_regs(child);
- for (i = 0; i < 32; i++)
- __get_user(fregs[i], i + (__u64 __user *) data);
+ for (i = 0; i < 32; i++) {
+ __get_user(fpr_val, i + (__u64 __user *)data);
+ set_fpr64(&fregs[i], 0, fpr_val);
+ }
__get_user(child->thread.fpu.fcr31, data + 64);
@@ -408,7 +412,7 @@ long arch_ptrace(struct task_struct *child, long request,
/* Read the word at location addr in the USER area. */
case PTRACE_PEEKUSR: {
struct pt_regs *regs;
- fpureg_t *fregs;
+ union fpureg *fregs;
unsigned long tmp = 0;
regs = task_pt_regs(child);
@@ -433,14 +437,12 @@ long arch_ptrace(struct task_struct *child, long request,
* order bits of the values stored in the even
* registers - unless we're using r2k_switch.S.
*/
- if (addr & 1)
- tmp = fregs[(addr & ~1) - 32] >> 32;
- else
- tmp = fregs[addr - 32];
+ tmp = get_fpr32(&fregs[(addr & ~1) - FPR_BASE],
+ addr & 1);
break;
}
#endif
- tmp = fregs[addr - FPR_BASE];
+ tmp = get_fpr32(&fregs[addr - FPR_BASE], 0);
break;
case PC:
tmp = regs->cp0_epc;
@@ -548,7 +550,7 @@ long arch_ptrace(struct task_struct *child, long request,
regs->regs[addr] = data;
break;
case FPR_BASE ... FPR_BASE + 31: {
- fpureg_t *fregs = get_fpu_regs(child);
+ union fpureg *fregs = get_fpu_regs(child);
if (!tsk_used_math(child)) {
/* FP not yet used */
@@ -563,19 +565,12 @@ long arch_ptrace(struct task_struct *child, long request,
* order bits of the values stored in the even
* registers - unless we're using r2k_switch.S.
*/
- if (addr & 1) {
- fregs[(addr & ~1) - FPR_BASE] &=
- 0xffffffff;
- fregs[(addr & ~1) - FPR_BASE] |=
- ((u64)data) << 32;
- } else {
- fregs[addr - FPR_BASE] &= ~0xffffffffLL;
- fregs[addr - FPR_BASE] |= data;
- }
+ set_fpr32(&fregs[(addr & ~1) - FPR_BASE],
+ addr & 1, data);
break;
}
#endif
- fregs[addr - FPR_BASE] = data;
+ set_fpr64(&fregs[addr - FPR_BASE], 0, data);
break;
}
case PC:
diff --git a/arch/mips/kernel/ptrace32.c b/arch/mips/kernel/ptrace32.c
index b8aa2dd5b00b..c394d8f74265 100644
--- a/arch/mips/kernel/ptrace32.c
+++ b/arch/mips/kernel/ptrace32.c
@@ -80,7 +80,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
/* Read the word at location addr in the USER area. */
case PTRACE_PEEKUSR: {
struct pt_regs *regs;
- fpureg_t *fregs;
+ union fpureg *fregs;
unsigned int tmp;
regs = task_pt_regs(child);
@@ -103,13 +103,11 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
* order bits of the values stored in the even
* registers - unless we're using r2k_switch.S.
*/
- if (addr & 1)
- tmp = fregs[(addr & ~1) - 32] >> 32;
- else
- tmp = fregs[addr - 32];
+ tmp = get_fpr32(&fregs[(addr & ~1) - FPR_BASE],
+ addr & 1);
break;
}
- tmp = fregs[addr - FPR_BASE];
+ tmp = get_fpr32(&fregs[addr - FPR_BASE], 0);
break;
case PC:
tmp = regs->cp0_epc;
@@ -233,7 +231,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
regs->regs[addr] = data;
break;
case FPR_BASE ... FPR_BASE + 31: {
- fpureg_t *fregs = get_fpu_regs(child);
+ union fpureg *fregs = get_fpu_regs(child);
if (!tsk_used_math(child)) {
/* FP not yet used */
@@ -247,18 +245,11 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
* order bits of the values stored in the even
* registers - unless we're using r2k_switch.S.
*/
- if (addr & 1) {
- fregs[(addr & ~1) - FPR_BASE] &=
- 0xffffffff;
- fregs[(addr & ~1) - FPR_BASE] |=
- ((u64)data) << 32;
- } else {
- fregs[addr - FPR_BASE] &= ~0xffffffffLL;
- fregs[addr - FPR_BASE] |= data;
- }
+ set_fpr32(&fregs[(addr & ~1) - FPR_BASE],
+ addr & 1, data);
break;
}
- fregs[addr - FPR_BASE] = data;
+ set_fpr64(&fregs[addr - FPR_BASE], 0, data);
break;
}
case PC:
diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c
index 506925b2c3f3..196cf1ab65af 100644
--- a/arch/mips/math-emu/cp1emu.c
+++ b/arch/mips/math-emu/cp1emu.c
@@ -876,20 +876,28 @@ static inline int cop1_64bit(struct pt_regs *xcp)
#endif
}
-#define SIFROMREG(si, x) ((si) = cop1_64bit(xcp) || !(x & 1) ? \
- (int)ctx->fpr[x] : (int)(ctx->fpr[x & ~1] >> 32))
+#define SIFROMREG(si, x) do { \
+ if (cop1_64bit(xcp)) \
+ (si) = get_fpr32(&ctx->fpr[x], 0); \
+ else \
+ (si) = get_fpr32(&ctx->fpr[(x) & ~1], (x) & 1); \
+} while (0)
-#define SITOREG(si, x) (ctx->fpr[x & ~(cop1_64bit(xcp) == 0)] = \
- cop1_64bit(xcp) || !(x & 1) ? \
- ctx->fpr[x & ~1] >> 32 << 32 | (u32)(si) : \
- ctx->fpr[x & ~1] << 32 >> 32 | (u64)(si) << 32)
+#define SITOREG(si, x) do { \
+ if (cop1_64bit(xcp)) \
+ set_fpr32(&ctx->fpr[x], 0, si); \
+ else \
+ set_fpr32(&ctx->fpr[(x) & ~1], (x) & 1, si); \
+} while (0)
-#define SIFROMHREG(si, x) ((si) = (int)(ctx->fpr[x] >> 32))
-#define SITOHREG(si, x) (ctx->fpr[x] = \
- ctx->fpr[x] << 32 >> 32 | (u64)(si) << 32)
+#define SIFROMHREG(si, x) ((si) = get_fpr32(&ctx->fpr[x], 1))
+#define SITOHREG(si, x) set_fpr32(&ctx->fpr[x], 1, si)
-#define DIFROMREG(di, x) ((di) = ctx->fpr[x & ~(cop1_64bit(xcp) == 0)])
-#define DITOREG(di, x) (ctx->fpr[x & ~(cop1_64bit(xcp) == 0)] = (di))
+#define DIFROMREG(di, x) \
+ ((di) = get_fpr64(&ctx->fpr[(x) & ~(cop1_64bit(xcp) == 0)], 0))
+
+#define DITOREG(di, x) \
+ set_fpr64(&ctx->fpr[(x) & ~(cop1_64bit(xcp) == 0)], 0, di)
#define SPFROMREG(sp, x) SIFROMREG((sp).bits, x)
#define SPTOREG(sp, x) SITOREG((sp).bits, x)
@@ -1960,15 +1968,18 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx,
#if defined(__mips64)
case l_fmt:{
+ u64 bits;
+ DIFROMREG(bits, MIPSInst_FS(ir));
+
switch (MIPSInst_FUNC(ir)) {
case fcvts_op:
/* convert long to single precision real */
- rv.s = ieee754sp_flong(ctx->fpr[MIPSInst_FS(ir)]);
+ rv.s = ieee754sp_flong(bits);
rfmt = s_fmt;
goto copcsr;
case fcvtd_op:
/* convert long to double precision real */
- rv.d = ieee754dp_flong(ctx->fpr[MIPSInst_FS(ir)]);
+ rv.d = ieee754dp_flong(bits);
rfmt = d_fmt;
goto copcsr;
default:
diff --git a/arch/mips/math-emu/kernel_linkage.c b/arch/mips/math-emu/kernel_linkage.c
index 3aeae07ed5b8..9b46213b1035 100644
--- a/arch/mips/math-emu/kernel_linkage.c
+++ b/arch/mips/math-emu/kernel_linkage.c
@@ -40,9 +40,8 @@ void fpu_emulator_init_fpu(void)
}
current->thread.fpu.fcr31 = 0;
- for (i = 0; i < 32; i++) {
- current->thread.fpu.fpr[i] = SIGNALLING_NAN;
- }
+ for (i = 0; i < 32; i++)
+ set_fpr64(&current->thread.fpu.fpr[i], 0, SIGNALLING_NAN);
}
@@ -59,7 +58,8 @@ int fpu_emulator_save_context(struct sigcontext __user *sc)
for (i = 0; i < 32; i++) {
err |=
- __put_user(current->thread.fpu.fpr[i], &sc->sc_fpregs[i]);
+ __put_user(get_fpr64(&current->thread.fpu.fpr[i], 0),
+ &sc->sc_fpregs[i]);
}
err |= __put_user(current->thread.fpu.fcr31, &sc->sc_fpc_csr);
@@ -70,10 +70,11 @@ int fpu_emulator_restore_context(struct sigcontext __user *sc)
{
int i;
int err = 0;
+ u64 fpr_val;
for (i = 0; i < 32; i++) {
- err |=
- __get_user(current->thread.fpu.fpr[i], &sc->sc_fpregs[i]);
+ err |= __get_user(fpr_val, &sc->sc_fpregs[i]);
+ set_fpr64(&current->thread.fpu.fpr[i], 0, fpr_val);
}
err |= __get_user(current->thread.fpu.fcr31, &sc->sc_fpc_csr);
@@ -93,7 +94,8 @@ int fpu_emulator_save_context32(struct sigcontext32 __user *sc)
for (i = 0; i < 32; i += inc) {
err |=
- __put_user(current->thread.fpu.fpr[i], &sc->sc_fpregs[i]);
+ __put_user(get_fpr64(&current->thread.fpu.fpr[i], 0),
+ &sc->sc_fpregs[i]);
}
err |= __put_user(current->thread.fpu.fcr31, &sc->sc_fpc_csr);
@@ -105,10 +107,11 @@ int fpu_emulator_restore_context32(struct sigcontext32 __user *sc)
int i;
int err = 0;
int inc = test_thread_flag(TIF_32BIT_FPREGS) ? 2 : 1;
+ u64 fpr_val;
for (i = 0; i < 32; i += inc) {
- err |=
- __get_user(current->thread.fpu.fpr[i], &sc->sc_fpregs[i]);
+ err |= __get_user(fpr_val, &sc->sc_fpregs[i]);
+ set_fpr64(&current->thread.fpu.fpr[i], 0, fpr_val);
}
err |= __get_user(current->thread.fpu.fcr31, &sc->sc_fpc_csr);
generated by cgit (git 2.34.1) at 2024-06-07 13:21:28 +0000