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@@ -13,6 +13,8 @@
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#include <linux/ptrace.h>
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#include <asm/sstep.h>
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#include <asm/processor.h>
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+#include <asm/uaccess.h>
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+#include <asm/cputable.h>
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extern char system_call_common[];
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@@ -23,6 +25,23 @@ extern char system_call_common[];
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#define MSR_MASK 0x87c0ffff
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#endif
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+/* Bits in XER */
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+#define XER_SO 0x80000000U
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+#define XER_OV 0x40000000U
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+#define XER_CA 0x20000000U
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+
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+/*
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+ * Functions in ldstfp.S
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+ */
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+extern int do_lfs(int rn, unsigned long ea);
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+extern int do_lfd(int rn, unsigned long ea);
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+extern int do_stfs(int rn, unsigned long ea);
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+extern int do_stfd(int rn, unsigned long ea);
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+extern int do_lvx(int rn, unsigned long ea);
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+extern int do_stvx(int rn, unsigned long ea);
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+extern int do_lxvd2x(int rn, unsigned long ea);
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+extern int do_stxvd2x(int rn, unsigned long ea);
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+
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/*
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* Determine whether a conditional branch instruction would branch.
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*/
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@@ -46,16 +65,499 @@ static int __kprobes branch_taken(unsigned int instr, struct pt_regs *regs)
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return 1;
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}
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+
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+static long __kprobes address_ok(struct pt_regs *regs, unsigned long ea, int nb)
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+{
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+ if (!user_mode(regs))
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+ return 1;
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+ return __access_ok(ea, nb, USER_DS);
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+}
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+
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+/*
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+ * Calculate effective address for a D-form instruction
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+ */
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+static unsigned long __kprobes dform_ea(unsigned int instr, struct pt_regs *regs)
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+{
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+ int ra;
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+ unsigned long ea;
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+
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+ ra = (instr >> 16) & 0x1f;
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+ ea = (signed short) instr; /* sign-extend */
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+ if (ra) {
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+ ea += regs->gpr[ra];
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+ if (instr & 0x04000000) /* update forms */
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+ regs->gpr[ra] = ea;
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+ }
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+#ifdef __powerpc64__
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+ if (!(regs->msr & MSR_SF))
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+ ea &= 0xffffffffUL;
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+#endif
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+ return ea;
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+}
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+
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+#ifdef __powerpc64__
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+/*
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+ * Calculate effective address for a DS-form instruction
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+ */
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+static unsigned long __kprobes dsform_ea(unsigned int instr, struct pt_regs *regs)
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+{
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+ int ra;
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+ unsigned long ea;
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+
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+ ra = (instr >> 16) & 0x1f;
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+ ea = (signed short) (instr & ~3); /* sign-extend */
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+ if (ra) {
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+ ea += regs->gpr[ra];
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+ if ((instr & 3) == 1) /* update forms */
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+ regs->gpr[ra] = ea;
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+ }
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+ if (!(regs->msr & MSR_SF))
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+ ea &= 0xffffffffUL;
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+ return ea;
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+}
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+#endif /* __powerpc64 */
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+
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+/*
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+ * Calculate effective address for an X-form instruction
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+ */
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+static unsigned long __kprobes xform_ea(unsigned int instr, struct pt_regs *regs,
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+ int do_update)
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+{
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+ int ra, rb;
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+ unsigned long ea;
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+
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+ ra = (instr >> 16) & 0x1f;
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+ rb = (instr >> 11) & 0x1f;
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+ ea = regs->gpr[rb];
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+ if (ra) {
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+ ea += regs->gpr[ra];
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+ if (do_update) /* update forms */
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+ regs->gpr[ra] = ea;
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+ }
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+#ifdef __powerpc64__
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+ if (!(regs->msr & MSR_SF))
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+ ea &= 0xffffffffUL;
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+#endif
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+ return ea;
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+}
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+
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+/*
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+ * Return the largest power of 2, not greater than sizeof(unsigned long),
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+ * such that x is a multiple of it.
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+ */
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+static inline unsigned long max_align(unsigned long x)
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+{
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+ x |= sizeof(unsigned long);
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+ return x & -x; /* isolates rightmost bit */
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+}
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+
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+
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+static inline unsigned long byterev_2(unsigned long x)
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+{
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+ return ((x >> 8) & 0xff) | ((x & 0xff) << 8);
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+}
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+
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+static inline unsigned long byterev_4(unsigned long x)
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+{
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+ return ((x >> 24) & 0xff) | ((x >> 8) & 0xff00) |
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+ ((x & 0xff00) << 8) | ((x & 0xff) << 24);
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+}
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+
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+#ifdef __powerpc64__
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+static inline unsigned long byterev_8(unsigned long x)
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+{
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+ return (byterev_4(x) << 32) | byterev_4(x >> 32);
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+}
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+#endif
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+
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+static int __kprobes read_mem_aligned(unsigned long *dest, unsigned long ea,
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+ int nb)
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+{
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+ int err = 0;
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+ unsigned long x = 0;
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+
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+ switch (nb) {
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+ case 1:
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+ err = __get_user(x, (unsigned char __user *) ea);
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+ break;
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+ case 2:
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+ err = __get_user(x, (unsigned short __user *) ea);
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+ break;
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+ case 4:
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+ err = __get_user(x, (unsigned int __user *) ea);
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+ break;
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+#ifdef __powerpc64__
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+ case 8:
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+ err = __get_user(x, (unsigned long __user *) ea);
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+ break;
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+#endif
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+ }
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+ if (!err)
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+ *dest = x;
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+ return err;
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+}
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+
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+static int __kprobes read_mem_unaligned(unsigned long *dest, unsigned long ea,
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+ int nb, struct pt_regs *regs)
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+{
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+ int err;
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+ unsigned long x, b, c;
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+
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+ /* unaligned, do this in pieces */
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+ x = 0;
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+ for (; nb > 0; nb -= c) {
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+ c = max_align(ea);
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+ if (c > nb)
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+ c = max_align(nb);
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+ err = read_mem_aligned(&b, ea, c);
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+ if (err)
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+ return err;
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+ x = (x << (8 * c)) + b;
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+ ea += c;
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+ }
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+ *dest = x;
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+ return 0;
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+}
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+
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+/*
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+ * Read memory at address ea for nb bytes, return 0 for success
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+ * or -EFAULT if an error occurred.
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+ */
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+static int __kprobes read_mem(unsigned long *dest, unsigned long ea, int nb,
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+ struct pt_regs *regs)
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+{
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+ if (!address_ok(regs, ea, nb))
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+ return -EFAULT;
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+ if ((ea & (nb - 1)) == 0)
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+ return read_mem_aligned(dest, ea, nb);
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+ return read_mem_unaligned(dest, ea, nb, regs);
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+}
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+
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+static int __kprobes write_mem_aligned(unsigned long val, unsigned long ea,
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+ int nb)
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+{
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+ int err = 0;
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+
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+ switch (nb) {
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+ case 1:
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+ err = __put_user(val, (unsigned char __user *) ea);
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+ break;
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+ case 2:
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+ err = __put_user(val, (unsigned short __user *) ea);
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+ break;
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+ case 4:
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+ err = __put_user(val, (unsigned int __user *) ea);
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+ break;
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+#ifdef __powerpc64__
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+ case 8:
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+ err = __put_user(val, (unsigned long __user *) ea);
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+ break;
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+#endif
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+ }
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+ return err;
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+}
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+
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+static int __kprobes write_mem_unaligned(unsigned long val, unsigned long ea,
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+ int nb, struct pt_regs *regs)
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+{
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+ int err;
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+ unsigned long c;
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+
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+ /* unaligned or little-endian, do this in pieces */
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+ for (; nb > 0; nb -= c) {
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+ c = max_align(ea);
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+ if (c > nb)
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+ c = max_align(nb);
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+ err = write_mem_aligned(val >> (nb - c) * 8, ea, c);
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+ if (err)
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+ return err;
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+ ++ea;
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+ }
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+ return 0;
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+}
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+
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+/*
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+ * Write memory at address ea for nb bytes, return 0 for success
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+ * or -EFAULT if an error occurred.
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+ */
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+static int __kprobes write_mem(unsigned long val, unsigned long ea, int nb,
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+ struct pt_regs *regs)
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+{
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+ if (!address_ok(regs, ea, nb))
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+ return -EFAULT;
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+ if ((ea & (nb - 1)) == 0)
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+ return write_mem_aligned(val, ea, nb);
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+ return write_mem_unaligned(val, ea, nb, regs);
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+}
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+
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/*
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- * Emulate instructions that cause a transfer of control.
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+ * Check the address and alignment, and call func to do the actual
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+ * load or store.
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+ */
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+static int __kprobes do_fp_load(int rn, int (*func)(int, unsigned long),
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+ unsigned long ea, int nb,
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+ struct pt_regs *regs)
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+{
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+ int err;
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+ unsigned long val[sizeof(double) / sizeof(long)];
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+ unsigned long ptr;
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+
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+ if (!address_ok(regs, ea, nb))
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+ return -EFAULT;
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+ if ((ea & 3) == 0)
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+ return (*func)(rn, ea);
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+ ptr = (unsigned long) &val[0];
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+ if (sizeof(unsigned long) == 8 || nb == 4) {
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+ err = read_mem_unaligned(&val[0], ea, nb, regs);
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+ ptr += sizeof(unsigned long) - nb;
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+ } else {
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+ /* reading a double on 32-bit */
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+ err = read_mem_unaligned(&val[0], ea, 4, regs);
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+ if (!err)
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+ err = read_mem_unaligned(&val[1], ea + 4, 4, regs);
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+ }
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+ if (err)
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+ return err;
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+ return (*func)(rn, ptr);
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+}
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+
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+static int __kprobes do_fp_store(int rn, int (*func)(int, unsigned long),
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+ unsigned long ea, int nb,
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+ struct pt_regs *regs)
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+{
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+ int err;
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+ unsigned long val[sizeof(double) / sizeof(long)];
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+ unsigned long ptr;
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+
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+ if (!address_ok(regs, ea, nb))
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+ return -EFAULT;
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+ if ((ea & 3) == 0)
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+ return (*func)(rn, ea);
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+ ptr = (unsigned long) &val[0];
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+ if (sizeof(unsigned long) == 8 || nb == 4) {
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+ ptr += sizeof(unsigned long) - nb;
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+ err = (*func)(rn, ptr);
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+ if (err)
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+ return err;
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+ err = write_mem_unaligned(val[0], ea, nb, regs);
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+ } else {
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+ /* writing a double on 32-bit */
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+ err = (*func)(rn, ptr);
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+ if (err)
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+ return err;
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+ err = write_mem_unaligned(val[0], ea, 4, regs);
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+ if (!err)
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+ err = write_mem_unaligned(val[1], ea + 4, 4, regs);
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+ }
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+ return err;
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+}
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+
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+#ifdef CONFIG_ALTIVEC
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+/* For Altivec/VMX, no need to worry about alignment */
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+static int __kprobes do_vec_load(int rn, int (*func)(int, unsigned long),
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+ unsigned long ea, struct pt_regs *regs)
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+{
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+ if (!address_ok(regs, ea & ~0xfUL, 16))
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+ return -EFAULT;
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+ return (*func)(rn, ea);
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+}
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+
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+static int __kprobes do_vec_store(int rn, int (*func)(int, unsigned long),
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+ unsigned long ea, struct pt_regs *regs)
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+{
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+ if (!address_ok(regs, ea & ~0xfUL, 16))
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+ return -EFAULT;
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+ return (*func)(rn, ea);
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+}
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+#endif /* CONFIG_ALTIVEC */
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+
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+#ifdef CONFIG_VSX
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+static int __kprobes do_vsx_load(int rn, int (*func)(int, unsigned long),
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+ unsigned long ea, struct pt_regs *regs)
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+{
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+ int err;
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+ unsigned long val[2];
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+
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+ if (!address_ok(regs, ea, 16))
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+ return -EFAULT;
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+ if ((ea & 3) == 0)
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+ return (*func)(rn, ea);
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+ err = read_mem_unaligned(&val[0], ea, 8, regs);
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+ if (!err)
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+ err = read_mem_unaligned(&val[1], ea + 8, 8, regs);
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+ if (!err)
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+ err = (*func)(rn, (unsigned long) &val[0]);
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+ return err;
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+}
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+
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+static int __kprobes do_vsx_store(int rn, int (*func)(int, unsigned long),
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+ unsigned long ea, struct pt_regs *regs)
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+{
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+ int err;
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+ unsigned long val[2];
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+
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+ if (!address_ok(regs, ea, 16))
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+ return -EFAULT;
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+ if ((ea & 3) == 0)
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+ return (*func)(rn, ea);
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+ err = (*func)(rn, (unsigned long) &val[0]);
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+ if (err)
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+ return err;
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+ err = write_mem_unaligned(val[0], ea, 8, regs);
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+ if (!err)
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+ err = write_mem_unaligned(val[1], ea + 8, 8, regs);
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+ return err;
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+}
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+#endif /* CONFIG_VSX */
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+
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+#define __put_user_asmx(x, addr, err, op, cr) \
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+ __asm__ __volatile__( \
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+ "1: " op " %2,0,%3\n" \
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+ " mfcr %1\n" \
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+ "2:\n" \
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+ ".section .fixup,\"ax\"\n" \
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+ "3: li %0,%4\n" \
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+ " b 2b\n" \
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+ ".previous\n" \
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+ ".section __ex_table,\"a\"\n" \
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+ PPC_LONG_ALIGN "\n" \
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+ PPC_LONG "1b,3b\n" \
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+ ".previous" \
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+ : "=r" (err), "=r" (cr) \
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+ : "r" (x), "r" (addr), "i" (-EFAULT), "0" (err))
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+
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+#define __get_user_asmx(x, addr, err, op) \
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+ __asm__ __volatile__( \
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+ "1: "op" %1,0,%2\n" \
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+ "2:\n" \
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+ ".section .fixup,\"ax\"\n" \
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+ "3: li %0,%3\n" \
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+ " b 2b\n" \
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+ ".previous\n" \
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+ ".section __ex_table,\"a\"\n" \
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+ PPC_LONG_ALIGN "\n" \
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+ PPC_LONG "1b,3b\n" \
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+ ".previous" \
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+ : "=r" (err), "=r" (x) \
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+ : "r" (addr), "i" (-EFAULT), "0" (err))
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+
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|
+#define __cacheop_user_asmx(addr, err, op) \
|
|
|
+ __asm__ __volatile__( \
|
|
|
+ "1: "op" 0,%1\n" \
|
|
|
+ "2:\n" \
|
|
|
+ ".section .fixup,\"ax\"\n" \
|
|
|
+ "3: li %0,%3\n" \
|
|
|
+ " b 2b\n" \
|
|
|
+ ".previous\n" \
|
|
|
+ ".section __ex_table,\"a\"\n" \
|
|
|
+ PPC_LONG_ALIGN "\n" \
|
|
|
+ PPC_LONG "1b,3b\n" \
|
|
|
+ ".previous" \
|
|
|
+ : "=r" (err) \
|
|
|
+ : "r" (addr), "i" (-EFAULT), "0" (err))
|
|
|
+
|
|
|
+static void __kprobes set_cr0(struct pt_regs *regs, int rd)
|
|
|
+{
|
|
|
+ long val = regs->gpr[rd];
|
|
|
+
|
|
|
+ regs->ccr = (regs->ccr & 0x0fffffff) | ((regs->xer >> 3) & 0x10000000);
|
|
|
+#ifdef __powerpc64__
|
|
|
+ if (!(regs->msr & MSR_SF))
|
|
|
+ val = (int) val;
|
|
|
+#endif
|
|
|
+ if (val < 0)
|
|
|
+ regs->ccr |= 0x80000000;
|
|
|
+ else if (val > 0)
|
|
|
+ regs->ccr |= 0x40000000;
|
|
|
+ else
|
|
|
+ regs->ccr |= 0x20000000;
|
|
|
+}
|
|
|
+
|
|
|
+static void __kprobes add_with_carry(struct pt_regs *regs, int rd,
|
|
|
+ unsigned long val1, unsigned long val2,
|
|
|
+ unsigned long carry_in)
|
|
|
+{
|
|
|
+ unsigned long val = val1 + val2;
|
|
|
+
|
|
|
+ if (carry_in)
|
|
|
+ ++val;
|
|
|
+ regs->gpr[rd] = val;
|
|
|
+#ifdef __powerpc64__
|
|
|
+ if (!(regs->msr & MSR_SF)) {
|
|
|
+ val = (unsigned int) val;
|
|
|
+ val1 = (unsigned int) val1;
|
|
|
+ }
|
|
|
+#endif
|
|
|
+ if (val < val1 || (carry_in && val == val1))
|
|
|
+ regs->xer |= XER_CA;
|
|
|
+ else
|
|
|
+ regs->xer &= ~XER_CA;
|
|
|
+}
|
|
|
+
|
|
|
+static void __kprobes do_cmp_signed(struct pt_regs *regs, long v1, long v2,
|
|
|
+ int crfld)
|
|
|
+{
|
|
|
+ unsigned int crval, shift;
|
|
|
+
|
|
|
+ crval = (regs->xer >> 31) & 1; /* get SO bit */
|
|
|
+ if (v1 < v2)
|
|
|
+ crval |= 8;
|
|
|
+ else if (v1 > v2)
|
|
|
+ crval |= 4;
|
|
|
+ else
|
|
|
+ crval |= 2;
|
|
|
+ shift = (7 - crfld) * 4;
|
|
|
+ regs->ccr = (regs->ccr & ~(0xf << shift)) | (crval << shift);
|
|
|
+}
|
|
|
+
|
|
|
+static void __kprobes do_cmp_unsigned(struct pt_regs *regs, unsigned long v1,
|
|
|
+ unsigned long v2, int crfld)
|
|
|
+{
|
|
|
+ unsigned int crval, shift;
|
|
|
+
|
|
|
+ crval = (regs->xer >> 31) & 1; /* get SO bit */
|
|
|
+ if (v1 < v2)
|
|
|
+ crval |= 8;
|
|
|
+ else if (v1 > v2)
|
|
|
+ crval |= 4;
|
|
|
+ else
|
|
|
+ crval |= 2;
|
|
|
+ shift = (7 - crfld) * 4;
|
|
|
+ regs->ccr = (regs->ccr & ~(0xf << shift)) | (crval << shift);
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * Elements of 32-bit rotate and mask instructions.
|
|
|
+ */
|
|
|
+#define MASK32(mb, me) ((0xffffffffUL >> (mb)) + \
|
|
|
+ ((signed long)-0x80000000L >> (me)) + ((me) >= (mb)))
|
|
|
+#ifdef __powerpc64__
|
|
|
+#define MASK64_L(mb) (~0UL >> (mb))
|
|
|
+#define MASK64_R(me) ((signed long)-0x8000000000000000L >> (me))
|
|
|
+#define MASK64(mb, me) (MASK64_L(mb) + MASK64_R(me) + ((me) >= (mb)))
|
|
|
+#define DATA32(x) (((x) & 0xffffffffUL) | (((x) & 0xffffffffUL) << 32))
|
|
|
+#else
|
|
|
+#define DATA32(x) (x)
|
|
|
+#endif
|
|
|
+#define ROTATE(x, n) ((n) ? (((x) << (n)) | ((x) >> (8 * sizeof(long) - (n)))) : (x))
|
|
|
+
|
|
|
+/*
|
|
|
+ * Emulate instructions that cause a transfer of control,
|
|
|
+ * loads and stores, and a few other instructions.
|
|
|
* Returns 1 if the step was emulated, 0 if not,
|
|
|
* or -1 if the instruction is one that should not be stepped,
|
|
|
* such as an rfid, or a mtmsrd that would clear MSR_RI.
|
|
|
*/
|
|
|
int __kprobes emulate_step(struct pt_regs *regs, unsigned int instr)
|
|
|
{
|
|
|
- unsigned int opcode, rs, rb, rd, spr;
|
|
|
+ unsigned int opcode, ra, rb, rd, spr, u;
|
|
|
unsigned long int imm;
|
|
|
+ unsigned long int val, val2;
|
|
|
+ unsigned long int ea;
|
|
|
+ unsigned int cr, mb, me, sh;
|
|
|
+ int err;
|
|
|
+ unsigned long old_ra;
|
|
|
+ long ival;
|
|
|
|
|
|
opcode = instr >> 26;
|
|
|
switch (opcode) {
|
|
@@ -78,7 +580,13 @@ int __kprobes emulate_step(struct pt_regs *regs, unsigned int instr)
|
|
|
* entry code works. If that is changed, this will
|
|
|
* need to be changed also.
|
|
|
*/
|
|
|
+ if (regs->gpr[0] == 0x1ebe &&
|
|
|
+ cpu_has_feature(CPU_FTR_REAL_LE)) {
|
|
|
+ regs->msr ^= MSR_LE;
|
|
|
+ goto instr_done;
|
|
|
+ }
|
|
|
regs->gpr[9] = regs->gpr[13];
|
|
|
+ regs->gpr[10] = MSR_KERNEL;
|
|
|
regs->gpr[11] = regs->nip + 4;
|
|
|
regs->gpr[12] = regs->msr & MSR_MASK;
|
|
|
regs->gpr[13] = (unsigned long) get_paca();
|
|
@@ -102,9 +610,9 @@ int __kprobes emulate_step(struct pt_regs *regs, unsigned int instr)
|
|
|
regs->nip = imm;
|
|
|
return 1;
|
|
|
case 19:
|
|
|
- switch (instr & 0x7fe) {
|
|
|
- case 0x20: /* bclr */
|
|
|
- case 0x420: /* bcctr */
|
|
|
+ switch ((instr >> 1) & 0x3ff) {
|
|
|
+ case 16: /* bclr */
|
|
|
+ case 528: /* bcctr */
|
|
|
imm = (instr & 0x400)? regs->ctr: regs->link;
|
|
|
regs->nip += 4;
|
|
|
if ((regs->msr & MSR_SF) == 0) {
|
|
@@ -116,30 +624,233 @@ int __kprobes emulate_step(struct pt_regs *regs, unsigned int instr)
|
|
|
if (branch_taken(instr, regs))
|
|
|
regs->nip = imm;
|
|
|
return 1;
|
|
|
- case 0x24: /* rfid, scary */
|
|
|
+
|
|
|
+ case 18: /* rfid, scary */
|
|
|
return -1;
|
|
|
+
|
|
|
+ case 150: /* isync */
|
|
|
+ isync();
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 33: /* crnor */
|
|
|
+ case 129: /* crandc */
|
|
|
+ case 193: /* crxor */
|
|
|
+ case 225: /* crnand */
|
|
|
+ case 257: /* crand */
|
|
|
+ case 289: /* creqv */
|
|
|
+ case 417: /* crorc */
|
|
|
+ case 449: /* cror */
|
|
|
+ ra = (instr >> 16) & 0x1f;
|
|
|
+ rb = (instr >> 11) & 0x1f;
|
|
|
+ rd = (instr >> 21) & 0x1f;
|
|
|
+ ra = (regs->ccr >> (31 - ra)) & 1;
|
|
|
+ rb = (regs->ccr >> (31 - rb)) & 1;
|
|
|
+ val = (instr >> (6 + ra * 2 + rb)) & 1;
|
|
|
+ regs->ccr = (regs->ccr & ~(1UL << (31 - rd))) |
|
|
|
+ (val << (31 - rd));
|
|
|
+ goto instr_done;
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case 31:
|
|
|
+ switch ((instr >> 1) & 0x3ff) {
|
|
|
+ case 598: /* sync */
|
|
|
+#ifdef __powerpc64__
|
|
|
+ switch ((instr >> 21) & 3) {
|
|
|
+ case 1: /* lwsync */
|
|
|
+ asm volatile("lwsync" : : : "memory");
|
|
|
+ goto instr_done;
|
|
|
+ case 2: /* ptesync */
|
|
|
+ asm volatile("ptesync" : : : "memory");
|
|
|
+ goto instr_done;
|
|
|
+ }
|
|
|
+#endif
|
|
|
+ mb();
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 854: /* eieio */
|
|
|
+ eieio();
|
|
|
+ goto instr_done;
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Following cases refer to regs->gpr[], so we need all regs */
|
|
|
+ if (!FULL_REGS(regs))
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ rd = (instr >> 21) & 0x1f;
|
|
|
+ ra = (instr >> 16) & 0x1f;
|
|
|
+ rb = (instr >> 11) & 0x1f;
|
|
|
+
|
|
|
+ switch (opcode) {
|
|
|
+ case 7: /* mulli */
|
|
|
+ regs->gpr[rd] = regs->gpr[ra] * (short) instr;
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 8: /* subfic */
|
|
|
+ imm = (short) instr;
|
|
|
+ add_with_carry(regs, rd, ~regs->gpr[ra], imm, 1);
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 10: /* cmpli */
|
|
|
+ imm = (unsigned short) instr;
|
|
|
+ val = regs->gpr[ra];
|
|
|
+#ifdef __powerpc64__
|
|
|
+ if ((rd & 1) == 0)
|
|
|
+ val = (unsigned int) val;
|
|
|
+#endif
|
|
|
+ do_cmp_unsigned(regs, val, imm, rd >> 2);
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 11: /* cmpi */
|
|
|
+ imm = (short) instr;
|
|
|
+ val = regs->gpr[ra];
|
|
|
+#ifdef __powerpc64__
|
|
|
+ if ((rd & 1) == 0)
|
|
|
+ val = (int) val;
|
|
|
+#endif
|
|
|
+ do_cmp_signed(regs, val, imm, rd >> 2);
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 12: /* addic */
|
|
|
+ imm = (short) instr;
|
|
|
+ add_with_carry(regs, rd, regs->gpr[ra], imm, 0);
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 13: /* addic. */
|
|
|
+ imm = (short) instr;
|
|
|
+ add_with_carry(regs, rd, regs->gpr[ra], imm, 0);
|
|
|
+ set_cr0(regs, rd);
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 14: /* addi */
|
|
|
+ imm = (short) instr;
|
|
|
+ if (ra)
|
|
|
+ imm += regs->gpr[ra];
|
|
|
+ regs->gpr[rd] = imm;
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 15: /* addis */
|
|
|
+ imm = ((short) instr) << 16;
|
|
|
+ if (ra)
|
|
|
+ imm += regs->gpr[ra];
|
|
|
+ regs->gpr[rd] = imm;
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 20: /* rlwimi */
|
|
|
+ mb = (instr >> 6) & 0x1f;
|
|
|
+ me = (instr >> 1) & 0x1f;
|
|
|
+ val = DATA32(regs->gpr[rd]);
|
|
|
+ imm = MASK32(mb, me);
|
|
|
+ regs->gpr[ra] = (regs->gpr[ra] & ~imm) | (ROTATE(val, rb) & imm);
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+ case 21: /* rlwinm */
|
|
|
+ mb = (instr >> 6) & 0x1f;
|
|
|
+ me = (instr >> 1) & 0x1f;
|
|
|
+ val = DATA32(regs->gpr[rd]);
|
|
|
+ regs->gpr[ra] = ROTATE(val, rb) & MASK32(mb, me);
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+ case 23: /* rlwnm */
|
|
|
+ mb = (instr >> 6) & 0x1f;
|
|
|
+ me = (instr >> 1) & 0x1f;
|
|
|
+ rb = regs->gpr[rb] & 0x1f;
|
|
|
+ val = DATA32(regs->gpr[rd]);
|
|
|
+ regs->gpr[ra] = ROTATE(val, rb) & MASK32(mb, me);
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+ case 24: /* ori */
|
|
|
+ imm = (unsigned short) instr;
|
|
|
+ regs->gpr[ra] = regs->gpr[rd] | imm;
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 25: /* oris */
|
|
|
+ imm = (unsigned short) instr;
|
|
|
+ regs->gpr[ra] = regs->gpr[rd] | (imm << 16);
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 26: /* xori */
|
|
|
+ imm = (unsigned short) instr;
|
|
|
+ regs->gpr[ra] = regs->gpr[rd] ^ imm;
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 27: /* xoris */
|
|
|
+ imm = (unsigned short) instr;
|
|
|
+ regs->gpr[ra] = regs->gpr[rd] ^ (imm << 16);
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 28: /* andi. */
|
|
|
+ imm = (unsigned short) instr;
|
|
|
+ regs->gpr[ra] = regs->gpr[rd] & imm;
|
|
|
+ set_cr0(regs, ra);
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 29: /* andis. */
|
|
|
+ imm = (unsigned short) instr;
|
|
|
+ regs->gpr[ra] = regs->gpr[rd] & (imm << 16);
|
|
|
+ set_cr0(regs, ra);
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+#ifdef __powerpc64__
|
|
|
+ case 30: /* rld* */
|
|
|
+ mb = ((instr >> 6) & 0x1f) | (instr & 0x20);
|
|
|
+ val = regs->gpr[rd];
|
|
|
+ if ((instr & 0x10) == 0) {
|
|
|
+ sh = rb | ((instr & 2) << 4);
|
|
|
+ val = ROTATE(val, sh);
|
|
|
+ switch ((instr >> 2) & 3) {
|
|
|
+ case 0: /* rldicl */
|
|
|
+ regs->gpr[ra] = val & MASK64_L(mb);
|
|
|
+ goto logical_done;
|
|
|
+ case 1: /* rldicr */
|
|
|
+ regs->gpr[ra] = val & MASK64_R(mb);
|
|
|
+ goto logical_done;
|
|
|
+ case 2: /* rldic */
|
|
|
+ regs->gpr[ra] = val & MASK64(mb, 63 - sh);
|
|
|
+ goto logical_done;
|
|
|
+ case 3: /* rldimi */
|
|
|
+ imm = MASK64(mb, 63 - sh);
|
|
|
+ regs->gpr[ra] = (regs->gpr[ra] & ~imm) |
|
|
|
+ (val & imm);
|
|
|
+ goto logical_done;
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ sh = regs->gpr[rb] & 0x3f;
|
|
|
+ val = ROTATE(val, sh);
|
|
|
+ switch ((instr >> 1) & 7) {
|
|
|
+ case 0: /* rldcl */
|
|
|
+ regs->gpr[ra] = val & MASK64_L(mb);
|
|
|
+ goto logical_done;
|
|
|
+ case 1: /* rldcr */
|
|
|
+ regs->gpr[ra] = val & MASK64_R(mb);
|
|
|
+ goto logical_done;
|
|
|
+ }
|
|
|
}
|
|
|
+#endif
|
|
|
+
|
|
|
case 31:
|
|
|
- rd = (instr >> 21) & 0x1f;
|
|
|
- switch (instr & 0x7fe) {
|
|
|
- case 0xa6: /* mfmsr */
|
|
|
+ switch ((instr >> 1) & 0x3ff) {
|
|
|
+ case 83: /* mfmsr */
|
|
|
+ if (regs->msr & MSR_PR)
|
|
|
+ break;
|
|
|
regs->gpr[rd] = regs->msr & MSR_MASK;
|
|
|
- regs->nip += 4;
|
|
|
- if ((regs->msr & MSR_SF) == 0)
|
|
|
- regs->nip &= 0xffffffffUL;
|
|
|
- return 1;
|
|
|
- case 0x124: /* mtmsr */
|
|
|
+ goto instr_done;
|
|
|
+ case 146: /* mtmsr */
|
|
|
+ if (regs->msr & MSR_PR)
|
|
|
+ break;
|
|
|
imm = regs->gpr[rd];
|
|
|
if ((imm & MSR_RI) == 0)
|
|
|
/* can't step mtmsr that would clear MSR_RI */
|
|
|
return -1;
|
|
|
regs->msr = imm;
|
|
|
- regs->nip += 4;
|
|
|
- return 1;
|
|
|
+ goto instr_done;
|
|
|
#ifdef CONFIG_PPC64
|
|
|
- case 0x164: /* mtmsrd */
|
|
|
+ case 178: /* mtmsrd */
|
|
|
/* only MSR_EE and MSR_RI get changed if bit 15 set */
|
|
|
/* mtmsrd doesn't change MSR_HV and MSR_ME */
|
|
|
+ if (regs->msr & MSR_PR)
|
|
|
+ break;
|
|
|
imm = (instr & 0x10000)? 0x8002: 0xefffffffffffefffUL;
|
|
|
imm = (regs->msr & MSR_MASK & ~imm)
|
|
|
| (regs->gpr[rd] & imm);
|
|
@@ -147,57 +858,770 @@ int __kprobes emulate_step(struct pt_regs *regs, unsigned int instr)
|
|
|
/* can't step mtmsrd that would clear MSR_RI */
|
|
|
return -1;
|
|
|
regs->msr = imm;
|
|
|
- regs->nip += 4;
|
|
|
- if ((imm & MSR_SF) == 0)
|
|
|
- regs->nip &= 0xffffffffUL;
|
|
|
- return 1;
|
|
|
+ goto instr_done;
|
|
|
#endif
|
|
|
- case 0x26: /* mfcr */
|
|
|
+ case 19: /* mfcr */
|
|
|
regs->gpr[rd] = regs->ccr;
|
|
|
regs->gpr[rd] &= 0xffffffffUL;
|
|
|
- goto mtspr_out;
|
|
|
- case 0x2a6: /* mfspr */
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 144: /* mtcrf */
|
|
|
+ imm = 0xf0000000UL;
|
|
|
+ val = regs->gpr[rd];
|
|
|
+ for (sh = 0; sh < 8; ++sh) {
|
|
|
+ if (instr & (0x80000 >> sh))
|
|
|
+ regs->ccr = (regs->ccr & ~imm) |
|
|
|
+ (val & imm);
|
|
|
+ imm >>= 4;
|
|
|
+ }
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 339: /* mfspr */
|
|
|
spr = (instr >> 11) & 0x3ff;
|
|
|
switch (spr) {
|
|
|
case 0x20: /* mfxer */
|
|
|
regs->gpr[rd] = regs->xer;
|
|
|
regs->gpr[rd] &= 0xffffffffUL;
|
|
|
- goto mtspr_out;
|
|
|
+ goto instr_done;
|
|
|
case 0x100: /* mflr */
|
|
|
regs->gpr[rd] = regs->link;
|
|
|
- goto mtspr_out;
|
|
|
+ goto instr_done;
|
|
|
case 0x120: /* mfctr */
|
|
|
regs->gpr[rd] = regs->ctr;
|
|
|
- goto mtspr_out;
|
|
|
- }
|
|
|
- break;
|
|
|
- case 0x378: /* orx */
|
|
|
- if (instr & 1)
|
|
|
- break;
|
|
|
- rs = (instr >> 21) & 0x1f;
|
|
|
- rb = (instr >> 11) & 0x1f;
|
|
|
- if (rs == rb) { /* mr */
|
|
|
- rd = (instr >> 16) & 0x1f;
|
|
|
- regs->gpr[rd] = regs->gpr[rs];
|
|
|
- goto mtspr_out;
|
|
|
+ goto instr_done;
|
|
|
}
|
|
|
break;
|
|
|
- case 0x3a6: /* mtspr */
|
|
|
+
|
|
|
+ case 467: /* mtspr */
|
|
|
spr = (instr >> 11) & 0x3ff;
|
|
|
switch (spr) {
|
|
|
case 0x20: /* mtxer */
|
|
|
regs->xer = (regs->gpr[rd] & 0xffffffffUL);
|
|
|
- goto mtspr_out;
|
|
|
+ goto instr_done;
|
|
|
case 0x100: /* mtlr */
|
|
|
regs->link = regs->gpr[rd];
|
|
|
- goto mtspr_out;
|
|
|
+ goto instr_done;
|
|
|
case 0x120: /* mtctr */
|
|
|
regs->ctr = regs->gpr[rd];
|
|
|
-mtspr_out:
|
|
|
- regs->nip += 4;
|
|
|
- return 1;
|
|
|
+ goto instr_done;
|
|
|
}
|
|
|
+ break;
|
|
|
+
|
|
|
+/*
|
|
|
+ * Compare instructions
|
|
|
+ */
|
|
|
+ case 0: /* cmp */
|
|
|
+ val = regs->gpr[ra];
|
|
|
+ val2 = regs->gpr[rb];
|
|
|
+#ifdef __powerpc64__
|
|
|
+ if ((rd & 1) == 0) {
|
|
|
+ /* word (32-bit) compare */
|
|
|
+ val = (int) val;
|
|
|
+ val2 = (int) val2;
|
|
|
+ }
|
|
|
+#endif
|
|
|
+ do_cmp_signed(regs, val, val2, rd >> 2);
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 32: /* cmpl */
|
|
|
+ val = regs->gpr[ra];
|
|
|
+ val2 = regs->gpr[rb];
|
|
|
+#ifdef __powerpc64__
|
|
|
+ if ((rd & 1) == 0) {
|
|
|
+ /* word (32-bit) compare */
|
|
|
+ val = (unsigned int) val;
|
|
|
+ val2 = (unsigned int) val2;
|
|
|
+ }
|
|
|
+#endif
|
|
|
+ do_cmp_unsigned(regs, val, val2, rd >> 2);
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+/*
|
|
|
+ * Arithmetic instructions
|
|
|
+ */
|
|
|
+ case 8: /* subfc */
|
|
|
+ add_with_carry(regs, rd, ~regs->gpr[ra],
|
|
|
+ regs->gpr[rb], 1);
|
|
|
+ goto arith_done;
|
|
|
+#ifdef __powerpc64__
|
|
|
+ case 9: /* mulhdu */
|
|
|
+ asm("mulhdu %0,%1,%2" : "=r" (regs->gpr[rd]) :
|
|
|
+ "r" (regs->gpr[ra]), "r" (regs->gpr[rb]));
|
|
|
+ goto arith_done;
|
|
|
+#endif
|
|
|
+ case 10: /* addc */
|
|
|
+ add_with_carry(regs, rd, regs->gpr[ra],
|
|
|
+ regs->gpr[rb], 0);
|
|
|
+ goto arith_done;
|
|
|
+
|
|
|
+ case 11: /* mulhwu */
|
|
|
+ asm("mulhwu %0,%1,%2" : "=r" (regs->gpr[rd]) :
|
|
|
+ "r" (regs->gpr[ra]), "r" (regs->gpr[rb]));
|
|
|
+ goto arith_done;
|
|
|
+
|
|
|
+ case 40: /* subf */
|
|
|
+ regs->gpr[rd] = regs->gpr[rb] - regs->gpr[ra];
|
|
|
+ goto arith_done;
|
|
|
+#ifdef __powerpc64__
|
|
|
+ case 73: /* mulhd */
|
|
|
+ asm("mulhd %0,%1,%2" : "=r" (regs->gpr[rd]) :
|
|
|
+ "r" (regs->gpr[ra]), "r" (regs->gpr[rb]));
|
|
|
+ goto arith_done;
|
|
|
+#endif
|
|
|
+ case 75: /* mulhw */
|
|
|
+ asm("mulhw %0,%1,%2" : "=r" (regs->gpr[rd]) :
|
|
|
+ "r" (regs->gpr[ra]), "r" (regs->gpr[rb]));
|
|
|
+ goto arith_done;
|
|
|
+
|
|
|
+ case 104: /* neg */
|
|
|
+ regs->gpr[rd] = -regs->gpr[ra];
|
|
|
+ goto arith_done;
|
|
|
+
|
|
|
+ case 136: /* subfe */
|
|
|
+ add_with_carry(regs, rd, ~regs->gpr[ra], regs->gpr[rb],
|
|
|
+ regs->xer & XER_CA);
|
|
|
+ goto arith_done;
|
|
|
+
|
|
|
+ case 138: /* adde */
|
|
|
+ add_with_carry(regs, rd, regs->gpr[ra], regs->gpr[rb],
|
|
|
+ regs->xer & XER_CA);
|
|
|
+ goto arith_done;
|
|
|
+
|
|
|
+ case 200: /* subfze */
|
|
|
+ add_with_carry(regs, rd, ~regs->gpr[ra], 0L,
|
|
|
+ regs->xer & XER_CA);
|
|
|
+ goto arith_done;
|
|
|
+
|
|
|
+ case 202: /* addze */
|
|
|
+ add_with_carry(regs, rd, regs->gpr[ra], 0L,
|
|
|
+ regs->xer & XER_CA);
|
|
|
+ goto arith_done;
|
|
|
+
|
|
|
+ case 232: /* subfme */
|
|
|
+ add_with_carry(regs, rd, ~regs->gpr[ra], -1L,
|
|
|
+ regs->xer & XER_CA);
|
|
|
+ goto arith_done;
|
|
|
+#ifdef __powerpc64__
|
|
|
+ case 233: /* mulld */
|
|
|
+ regs->gpr[rd] = regs->gpr[ra] * regs->gpr[rb];
|
|
|
+ goto arith_done;
|
|
|
+#endif
|
|
|
+ case 234: /* addme */
|
|
|
+ add_with_carry(regs, rd, regs->gpr[ra], -1L,
|
|
|
+ regs->xer & XER_CA);
|
|
|
+ goto arith_done;
|
|
|
+
|
|
|
+ case 235: /* mullw */
|
|
|
+ regs->gpr[rd] = (unsigned int) regs->gpr[ra] *
|
|
|
+ (unsigned int) regs->gpr[rb];
|
|
|
+ goto arith_done;
|
|
|
+
|
|
|
+ case 266: /* add */
|
|
|
+ regs->gpr[rd] = regs->gpr[ra] + regs->gpr[rb];
|
|
|
+ goto arith_done;
|
|
|
+#ifdef __powerpc64__
|
|
|
+ case 457: /* divdu */
|
|
|
+ regs->gpr[rd] = regs->gpr[ra] / regs->gpr[rb];
|
|
|
+ goto arith_done;
|
|
|
+#endif
|
|
|
+ case 459: /* divwu */
|
|
|
+ regs->gpr[rd] = (unsigned int) regs->gpr[ra] /
|
|
|
+ (unsigned int) regs->gpr[rb];
|
|
|
+ goto arith_done;
|
|
|
+#ifdef __powerpc64__
|
|
|
+ case 489: /* divd */
|
|
|
+ regs->gpr[rd] = (long int) regs->gpr[ra] /
|
|
|
+ (long int) regs->gpr[rb];
|
|
|
+ goto arith_done;
|
|
|
+#endif
|
|
|
+ case 491: /* divw */
|
|
|
+ regs->gpr[rd] = (int) regs->gpr[ra] /
|
|
|
+ (int) regs->gpr[rb];
|
|
|
+ goto arith_done;
|
|
|
+
|
|
|
+
|
|
|
+/*
|
|
|
+ * Logical instructions
|
|
|
+ */
|
|
|
+ case 26: /* cntlzw */
|
|
|
+ asm("cntlzw %0,%1" : "=r" (regs->gpr[ra]) :
|
|
|
+ "r" (regs->gpr[rd]));
|
|
|
+ goto logical_done;
|
|
|
+#ifdef __powerpc64__
|
|
|
+ case 58: /* cntlzd */
|
|
|
+ asm("cntlzd %0,%1" : "=r" (regs->gpr[ra]) :
|
|
|
+ "r" (regs->gpr[rd]));
|
|
|
+ goto logical_done;
|
|
|
+#endif
|
|
|
+ case 28: /* and */
|
|
|
+ regs->gpr[ra] = regs->gpr[rd] & regs->gpr[rb];
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+ case 60: /* andc */
|
|
|
+ regs->gpr[ra] = regs->gpr[rd] & ~regs->gpr[rb];
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+ case 124: /* nor */
|
|
|
+ regs->gpr[ra] = ~(regs->gpr[rd] | regs->gpr[rb]);
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+ case 284: /* xor */
|
|
|
+ regs->gpr[ra] = ~(regs->gpr[rd] ^ regs->gpr[rb]);
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+ case 316: /* xor */
|
|
|
+ regs->gpr[ra] = regs->gpr[rd] ^ regs->gpr[rb];
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+ case 412: /* orc */
|
|
|
+ regs->gpr[ra] = regs->gpr[rd] | ~regs->gpr[rb];
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+ case 444: /* or */
|
|
|
+ regs->gpr[ra] = regs->gpr[rd] | regs->gpr[rb];
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+ case 476: /* nand */
|
|
|
+ regs->gpr[ra] = ~(regs->gpr[rd] & regs->gpr[rb]);
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+ case 922: /* extsh */
|
|
|
+ regs->gpr[ra] = (signed short) regs->gpr[rd];
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+ case 954: /* extsb */
|
|
|
+ regs->gpr[ra] = (signed char) regs->gpr[rd];
|
|
|
+ goto logical_done;
|
|
|
+#ifdef __powerpc64__
|
|
|
+ case 986: /* extsw */
|
|
|
+ regs->gpr[ra] = (signed int) regs->gpr[rd];
|
|
|
+ goto logical_done;
|
|
|
+#endif
|
|
|
+
|
|
|
+/*
|
|
|
+ * Shift instructions
|
|
|
+ */
|
|
|
+ case 24: /* slw */
|
|
|
+ sh = regs->gpr[rb] & 0x3f;
|
|
|
+ if (sh < 32)
|
|
|
+ regs->gpr[ra] = (regs->gpr[rd] << sh) & 0xffffffffUL;
|
|
|
+ else
|
|
|
+ regs->gpr[ra] = 0;
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+ case 536: /* srw */
|
|
|
+ sh = regs->gpr[rb] & 0x3f;
|
|
|
+ if (sh < 32)
|
|
|
+ regs->gpr[ra] = (regs->gpr[rd] & 0xffffffffUL) >> sh;
|
|
|
+ else
|
|
|
+ regs->gpr[ra] = 0;
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+ case 792: /* sraw */
|
|
|
+ sh = regs->gpr[rb] & 0x3f;
|
|
|
+ ival = (signed int) regs->gpr[rd];
|
|
|
+ regs->gpr[ra] = ival >> (sh < 32 ? sh : 31);
|
|
|
+ if (ival < 0 && (sh >= 32 || (ival & ((1 << sh) - 1)) != 0))
|
|
|
+ regs->xer |= XER_CA;
|
|
|
+ else
|
|
|
+ regs->xer &= ~XER_CA;
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+ case 824: /* srawi */
|
|
|
+ sh = rb;
|
|
|
+ ival = (signed int) regs->gpr[rd];
|
|
|
+ regs->gpr[ra] = ival >> sh;
|
|
|
+ if (ival < 0 && (ival & ((1 << sh) - 1)) != 0)
|
|
|
+ regs->xer |= XER_CA;
|
|
|
+ else
|
|
|
+ regs->xer &= ~XER_CA;
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+#ifdef __powerpc64__
|
|
|
+ case 27: /* sld */
|
|
|
+ sh = regs->gpr[rd] & 0x7f;
|
|
|
+ if (sh < 64)
|
|
|
+ regs->gpr[ra] = regs->gpr[rd] << sh;
|
|
|
+ else
|
|
|
+ regs->gpr[ra] = 0;
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+ case 539: /* srd */
|
|
|
+ sh = regs->gpr[rb] & 0x7f;
|
|
|
+ if (sh < 64)
|
|
|
+ regs->gpr[ra] = regs->gpr[rd] >> sh;
|
|
|
+ else
|
|
|
+ regs->gpr[ra] = 0;
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+ case 794: /* srad */
|
|
|
+ sh = regs->gpr[rb] & 0x7f;
|
|
|
+ ival = (signed long int) regs->gpr[rd];
|
|
|
+ regs->gpr[ra] = ival >> (sh < 64 ? sh : 63);
|
|
|
+ if (ival < 0 && (sh >= 64 || (ival & ((1 << sh) - 1)) != 0))
|
|
|
+ regs->xer |= XER_CA;
|
|
|
+ else
|
|
|
+ regs->xer &= ~XER_CA;
|
|
|
+ goto logical_done;
|
|
|
+
|
|
|
+ case 826: /* sradi with sh_5 = 0 */
|
|
|
+ case 827: /* sradi with sh_5 = 1 */
|
|
|
+ sh = rb | ((instr & 2) << 4);
|
|
|
+ ival = (signed long int) regs->gpr[rd];
|
|
|
+ regs->gpr[ra] = ival >> sh;
|
|
|
+ if (ival < 0 && (ival & ((1 << sh) - 1)) != 0)
|
|
|
+ regs->xer |= XER_CA;
|
|
|
+ else
|
|
|
+ regs->xer &= ~XER_CA;
|
|
|
+ goto logical_done;
|
|
|
+#endif /* __powerpc64__ */
|
|
|
+
|
|
|
+/*
|
|
|
+ * Cache instructions
|
|
|
+ */
|
|
|
+ case 54: /* dcbst */
|
|
|
+ ea = xform_ea(instr, regs, 0);
|
|
|
+ if (!address_ok(regs, ea, 8))
|
|
|
+ return 0;
|
|
|
+ err = 0;
|
|
|
+ __cacheop_user_asmx(ea, err, "dcbst");
|
|
|
+ if (err)
|
|
|
+ return 0;
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 86: /* dcbf */
|
|
|
+ ea = xform_ea(instr, regs, 0);
|
|
|
+ if (!address_ok(regs, ea, 8))
|
|
|
+ return 0;
|
|
|
+ err = 0;
|
|
|
+ __cacheop_user_asmx(ea, err, "dcbf");
|
|
|
+ if (err)
|
|
|
+ return 0;
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 246: /* dcbtst */
|
|
|
+ if (rd == 0) {
|
|
|
+ ea = xform_ea(instr, regs, 0);
|
|
|
+ prefetchw((void *) ea);
|
|
|
+ }
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 278: /* dcbt */
|
|
|
+ if (rd == 0) {
|
|
|
+ ea = xform_ea(instr, regs, 0);
|
|
|
+ prefetch((void *) ea);
|
|
|
+ }
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
}
|
|
|
+ break;
|
|
|
}
|
|
|
- return 0;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Following cases are for loads and stores, so bail out
|
|
|
+ * if we're in little-endian mode.
|
|
|
+ */
|
|
|
+ if (regs->msr & MSR_LE)
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Save register RA in case it's an update form load or store
|
|
|
+ * and the access faults.
|
|
|
+ */
|
|
|
+ old_ra = regs->gpr[ra];
|
|
|
+
|
|
|
+ switch (opcode) {
|
|
|
+ case 31:
|
|
|
+ u = instr & 0x40;
|
|
|
+ switch ((instr >> 1) & 0x3ff) {
|
|
|
+ case 20: /* lwarx */
|
|
|
+ ea = xform_ea(instr, regs, 0);
|
|
|
+ if (ea & 3)
|
|
|
+ break; /* can't handle misaligned */
|
|
|
+ err = -EFAULT;
|
|
|
+ if (!address_ok(regs, ea, 4))
|
|
|
+ goto ldst_done;
|
|
|
+ err = 0;
|
|
|
+ __get_user_asmx(val, ea, err, "lwarx");
|
|
|
+ if (!err)
|
|
|
+ regs->gpr[rd] = val;
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 150: /* stwcx. */
|
|
|
+ ea = xform_ea(instr, regs, 0);
|
|
|
+ if (ea & 3)
|
|
|
+ break; /* can't handle misaligned */
|
|
|
+ err = -EFAULT;
|
|
|
+ if (!address_ok(regs, ea, 4))
|
|
|
+ goto ldst_done;
|
|
|
+ err = 0;
|
|
|
+ __put_user_asmx(regs->gpr[rd], ea, err, "stwcx.", cr);
|
|
|
+ if (!err)
|
|
|
+ regs->ccr = (regs->ccr & 0x0fffffff) |
|
|
|
+ (cr & 0xe0000000) |
|
|
|
+ ((regs->xer >> 3) & 0x10000000);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+#ifdef __powerpc64__
|
|
|
+ case 84: /* ldarx */
|
|
|
+ ea = xform_ea(instr, regs, 0);
|
|
|
+ if (ea & 7)
|
|
|
+ break; /* can't handle misaligned */
|
|
|
+ err = -EFAULT;
|
|
|
+ if (!address_ok(regs, ea, 8))
|
|
|
+ goto ldst_done;
|
|
|
+ err = 0;
|
|
|
+ __get_user_asmx(val, ea, err, "ldarx");
|
|
|
+ if (!err)
|
|
|
+ regs->gpr[rd] = val;
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 214: /* stdcx. */
|
|
|
+ ea = xform_ea(instr, regs, 0);
|
|
|
+ if (ea & 7)
|
|
|
+ break; /* can't handle misaligned */
|
|
|
+ err = -EFAULT;
|
|
|
+ if (!address_ok(regs, ea, 8))
|
|
|
+ goto ldst_done;
|
|
|
+ err = 0;
|
|
|
+ __put_user_asmx(regs->gpr[rd], ea, err, "stdcx.", cr);
|
|
|
+ if (!err)
|
|
|
+ regs->ccr = (regs->ccr & 0x0fffffff) |
|
|
|
+ (cr & 0xe0000000) |
|
|
|
+ ((regs->xer >> 3) & 0x10000000);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 21: /* ldx */
|
|
|
+ case 53: /* ldux */
|
|
|
+ err = read_mem(®s->gpr[rd], xform_ea(instr, regs, u),
|
|
|
+ 8, regs);
|
|
|
+ goto ldst_done;
|
|
|
+#endif
|
|
|
+
|
|
|
+ case 23: /* lwzx */
|
|
|
+ case 55: /* lwzux */
|
|
|
+ err = read_mem(®s->gpr[rd], xform_ea(instr, regs, u),
|
|
|
+ 4, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 87: /* lbzx */
|
|
|
+ case 119: /* lbzux */
|
|
|
+ err = read_mem(®s->gpr[rd], xform_ea(instr, regs, u),
|
|
|
+ 1, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+#ifdef CONFIG_ALTIVEC
|
|
|
+ case 103: /* lvx */
|
|
|
+ case 359: /* lvxl */
|
|
|
+ if (!(regs->msr & MSR_VEC))
|
|
|
+ break;
|
|
|
+ ea = xform_ea(instr, regs, 0);
|
|
|
+ err = do_vec_load(rd, do_lvx, ea, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 231: /* stvx */
|
|
|
+ case 487: /* stvxl */
|
|
|
+ if (!(regs->msr & MSR_VEC))
|
|
|
+ break;
|
|
|
+ ea = xform_ea(instr, regs, 0);
|
|
|
+ err = do_vec_store(rd, do_stvx, ea, regs);
|
|
|
+ goto ldst_done;
|
|
|
+#endif /* CONFIG_ALTIVEC */
|
|
|
+
|
|
|
+#ifdef __powerpc64__
|
|
|
+ case 149: /* stdx */
|
|
|
+ case 181: /* stdux */
|
|
|
+ val = regs->gpr[rd];
|
|
|
+ err = write_mem(val, xform_ea(instr, regs, u), 8, regs);
|
|
|
+ goto ldst_done;
|
|
|
+#endif
|
|
|
+
|
|
|
+ case 151: /* stwx */
|
|
|
+ case 183: /* stwux */
|
|
|
+ val = regs->gpr[rd];
|
|
|
+ err = write_mem(val, xform_ea(instr, regs, u), 4, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 215: /* stbx */
|
|
|
+ case 247: /* stbux */
|
|
|
+ val = regs->gpr[rd];
|
|
|
+ err = write_mem(val, xform_ea(instr, regs, u), 1, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 279: /* lhzx */
|
|
|
+ case 311: /* lhzux */
|
|
|
+ err = read_mem(®s->gpr[rd], xform_ea(instr, regs, u),
|
|
|
+ 2, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+#ifdef __powerpc64__
|
|
|
+ case 341: /* lwax */
|
|
|
+ case 373: /* lwaux */
|
|
|
+ err = read_mem(®s->gpr[rd], xform_ea(instr, regs, u),
|
|
|
+ 4, regs);
|
|
|
+ if (!err)
|
|
|
+ regs->gpr[rd] = (signed int) regs->gpr[rd];
|
|
|
+ goto ldst_done;
|
|
|
+#endif
|
|
|
+
|
|
|
+ case 343: /* lhax */
|
|
|
+ case 375: /* lhaux */
|
|
|
+ err = read_mem(®s->gpr[rd], xform_ea(instr, regs, u),
|
|
|
+ 2, regs);
|
|
|
+ if (!err)
|
|
|
+ regs->gpr[rd] = (signed short) regs->gpr[rd];
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 407: /* sthx */
|
|
|
+ case 439: /* sthux */
|
|
|
+ val = regs->gpr[rd];
|
|
|
+ err = write_mem(val, xform_ea(instr, regs, u), 2, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+#ifdef __powerpc64__
|
|
|
+ case 532: /* ldbrx */
|
|
|
+ err = read_mem(&val, xform_ea(instr, regs, 0), 8, regs);
|
|
|
+ if (!err)
|
|
|
+ regs->gpr[rd] = byterev_8(val);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+#endif
|
|
|
+
|
|
|
+ case 534: /* lwbrx */
|
|
|
+ err = read_mem(&val, xform_ea(instr, regs, 0), 4, regs);
|
|
|
+ if (!err)
|
|
|
+ regs->gpr[rd] = byterev_4(val);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 535: /* lfsx */
|
|
|
+ case 567: /* lfsux */
|
|
|
+ if (!(regs->msr & MSR_FP))
|
|
|
+ break;
|
|
|
+ ea = xform_ea(instr, regs, u);
|
|
|
+ err = do_fp_load(rd, do_lfs, ea, 4, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 599: /* lfdx */
|
|
|
+ case 631: /* lfdux */
|
|
|
+ if (!(regs->msr & MSR_FP))
|
|
|
+ break;
|
|
|
+ ea = xform_ea(instr, regs, u);
|
|
|
+ err = do_fp_load(rd, do_lfd, ea, 8, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 663: /* stfsx */
|
|
|
+ case 695: /* stfsux */
|
|
|
+ if (!(regs->msr & MSR_FP))
|
|
|
+ break;
|
|
|
+ ea = xform_ea(instr, regs, u);
|
|
|
+ err = do_fp_store(rd, do_stfs, ea, 4, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 727: /* stfdx */
|
|
|
+ case 759: /* stfdux */
|
|
|
+ if (!(regs->msr & MSR_FP))
|
|
|
+ break;
|
|
|
+ ea = xform_ea(instr, regs, u);
|
|
|
+ err = do_fp_store(rd, do_stfd, ea, 8, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+#ifdef __powerpc64__
|
|
|
+ case 660: /* stdbrx */
|
|
|
+ val = byterev_8(regs->gpr[rd]);
|
|
|
+ err = write_mem(val, xform_ea(instr, regs, 0), 8, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+#endif
|
|
|
+ case 662: /* stwbrx */
|
|
|
+ val = byterev_4(regs->gpr[rd]);
|
|
|
+ err = write_mem(val, xform_ea(instr, regs, 0), 4, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 790: /* lhbrx */
|
|
|
+ err = read_mem(&val, xform_ea(instr, regs, 0), 2, regs);
|
|
|
+ if (!err)
|
|
|
+ regs->gpr[rd] = byterev_2(val);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 918: /* sthbrx */
|
|
|
+ val = byterev_2(regs->gpr[rd]);
|
|
|
+ err = write_mem(val, xform_ea(instr, regs, 0), 2, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+#ifdef CONFIG_VSX
|
|
|
+ case 844: /* lxvd2x */
|
|
|
+ case 876: /* lxvd2ux */
|
|
|
+ if (!(regs->msr & MSR_VSX))
|
|
|
+ break;
|
|
|
+ rd |= (instr & 1) << 5;
|
|
|
+ ea = xform_ea(instr, regs, u);
|
|
|
+ err = do_vsx_load(rd, do_lxvd2x, ea, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 972: /* stxvd2x */
|
|
|
+ case 1004: /* stxvd2ux */
|
|
|
+ if (!(regs->msr & MSR_VSX))
|
|
|
+ break;
|
|
|
+ rd |= (instr & 1) << 5;
|
|
|
+ ea = xform_ea(instr, regs, u);
|
|
|
+ err = do_vsx_store(rd, do_stxvd2x, ea, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+#endif /* CONFIG_VSX */
|
|
|
+ }
|
|
|
+ break;
|
|
|
+
|
|
|
+ case 32: /* lwz */
|
|
|
+ case 33: /* lwzu */
|
|
|
+ err = read_mem(®s->gpr[rd], dform_ea(instr, regs), 4, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 34: /* lbz */
|
|
|
+ case 35: /* lbzu */
|
|
|
+ err = read_mem(®s->gpr[rd], dform_ea(instr, regs), 1, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 36: /* stw */
|
|
|
+ case 37: /* stwu */
|
|
|
+ val = regs->gpr[rd];
|
|
|
+ err = write_mem(val, dform_ea(instr, regs), 4, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 38: /* stb */
|
|
|
+ case 39: /* stbu */
|
|
|
+ val = regs->gpr[rd];
|
|
|
+ err = write_mem(val, dform_ea(instr, regs), 1, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 40: /* lhz */
|
|
|
+ case 41: /* lhzu */
|
|
|
+ err = read_mem(®s->gpr[rd], dform_ea(instr, regs), 2, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 42: /* lha */
|
|
|
+ case 43: /* lhau */
|
|
|
+ err = read_mem(®s->gpr[rd], dform_ea(instr, regs), 2, regs);
|
|
|
+ if (!err)
|
|
|
+ regs->gpr[rd] = (signed short) regs->gpr[rd];
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 44: /* sth */
|
|
|
+ case 45: /* sthu */
|
|
|
+ val = regs->gpr[rd];
|
|
|
+ err = write_mem(val, dform_ea(instr, regs), 2, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 46: /* lmw */
|
|
|
+ ra = (instr >> 16) & 0x1f;
|
|
|
+ if (ra >= rd)
|
|
|
+ break; /* invalid form, ra in range to load */
|
|
|
+ ea = dform_ea(instr, regs);
|
|
|
+ do {
|
|
|
+ err = read_mem(®s->gpr[rd], ea, 4, regs);
|
|
|
+ if (err)
|
|
|
+ return 0;
|
|
|
+ ea += 4;
|
|
|
+ } while (++rd < 32);
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 47: /* stmw */
|
|
|
+ ea = dform_ea(instr, regs);
|
|
|
+ do {
|
|
|
+ err = write_mem(regs->gpr[rd], ea, 4, regs);
|
|
|
+ if (err)
|
|
|
+ return 0;
|
|
|
+ ea += 4;
|
|
|
+ } while (++rd < 32);
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ case 48: /* lfs */
|
|
|
+ case 49: /* lfsu */
|
|
|
+ if (!(regs->msr & MSR_FP))
|
|
|
+ break;
|
|
|
+ ea = dform_ea(instr, regs);
|
|
|
+ err = do_fp_load(rd, do_lfs, ea, 4, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 50: /* lfd */
|
|
|
+ case 51: /* lfdu */
|
|
|
+ if (!(regs->msr & MSR_FP))
|
|
|
+ break;
|
|
|
+ ea = dform_ea(instr, regs);
|
|
|
+ err = do_fp_load(rd, do_lfd, ea, 8, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 52: /* stfs */
|
|
|
+ case 53: /* stfsu */
|
|
|
+ if (!(regs->msr & MSR_FP))
|
|
|
+ break;
|
|
|
+ ea = dform_ea(instr, regs);
|
|
|
+ err = do_fp_store(rd, do_stfs, ea, 4, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+ case 54: /* stfd */
|
|
|
+ case 55: /* stfdu */
|
|
|
+ if (!(regs->msr & MSR_FP))
|
|
|
+ break;
|
|
|
+ ea = dform_ea(instr, regs);
|
|
|
+ err = do_fp_store(rd, do_stfd, ea, 8, regs);
|
|
|
+ goto ldst_done;
|
|
|
+
|
|
|
+#ifdef __powerpc64__
|
|
|
+ case 58: /* ld[u], lwa */
|
|
|
+ switch (instr & 3) {
|
|
|
+ case 0: /* ld */
|
|
|
+ err = read_mem(®s->gpr[rd], dsform_ea(instr, regs),
|
|
|
+ 8, regs);
|
|
|
+ goto ldst_done;
|
|
|
+ case 1: /* ldu */
|
|
|
+ err = read_mem(®s->gpr[rd], dsform_ea(instr, regs),
|
|
|
+ 8, regs);
|
|
|
+ goto ldst_done;
|
|
|
+ case 2: /* lwa */
|
|
|
+ err = read_mem(®s->gpr[rd], dsform_ea(instr, regs),
|
|
|
+ 4, regs);
|
|
|
+ if (!err)
|
|
|
+ regs->gpr[rd] = (signed int) regs->gpr[rd];
|
|
|
+ goto ldst_done;
|
|
|
+ }
|
|
|
+ break;
|
|
|
+
|
|
|
+ case 62: /* std[u] */
|
|
|
+ val = regs->gpr[rd];
|
|
|
+ switch (instr & 3) {
|
|
|
+ case 0: /* std */
|
|
|
+ err = write_mem(val, dsform_ea(instr, regs), 8, regs);
|
|
|
+ goto ldst_done;
|
|
|
+ case 1: /* stdu */
|
|
|
+ err = write_mem(val, dsform_ea(instr, regs), 8, regs);
|
|
|
+ goto ldst_done;
|
|
|
+ }
|
|
|
+ break;
|
|
|
+#endif /* __powerpc64__ */
|
|
|
+
|
|
|
+ }
|
|
|
+ err = -EINVAL;
|
|
|
+
|
|
|
+ ldst_done:
|
|
|
+ if (err) {
|
|
|
+ regs->gpr[ra] = old_ra;
|
|
|
+ return 0; /* invoke DSI if -EFAULT? */
|
|
|
+ }
|
|
|
+ instr_done:
|
|
|
+ regs->nip += 4;
|
|
|
+#ifdef __powerpc64__
|
|
|
+ if ((regs->msr & MSR_SF) == 0)
|
|
|
+ regs->nip &= 0xffffffffUL;
|
|
|
+#endif
|
|
|
+ return 1;
|
|
|
+
|
|
|
+ logical_done:
|
|
|
+ if (instr & 1)
|
|
|
+ set_cr0(regs, ra);
|
|
|
+ goto instr_done;
|
|
|
+
|
|
|
+ arith_done:
|
|
|
+ if (instr & 1)
|
|
|
+ set_cr0(regs, rd);
|
|
|
+ goto instr_done;
|
|
|
}
|