kgdb,mips: Individual register get/set for mips
Implement the ability to individually get and set registers for kdb and kgdb for mips. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> CC: linux-mips@linux-mips.org
This commit is contained in:
Jason Wessel
parent
12bfa3de63
commit
0896a9becd
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@ -8,28 +8,27 @@
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#if (_MIPS_ISA == _MIPS_ISA_MIPS1) || (_MIPS_ISA == _MIPS_ISA_MIPS2) || \
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(_MIPS_ISA == _MIPS_ISA_MIPS32)
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#define KGDB_GDB_REG_SIZE 32
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#define KGDB_GDB_REG_SIZE 32
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#define GDB_SIZEOF_REG sizeof(u32)
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#elif (_MIPS_ISA == _MIPS_ISA_MIPS3) || (_MIPS_ISA == _MIPS_ISA_MIPS4) || \
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(_MIPS_ISA == _MIPS_ISA_MIPS64)
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#ifdef CONFIG_32BIT
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#define KGDB_GDB_REG_SIZE 32
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#define KGDB_GDB_REG_SIZE 32
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#define GDB_SIZEOF_REG sizeof(u32)
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#else /* CONFIG_CPU_32BIT */
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#define KGDB_GDB_REG_SIZE 64
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#define KGDB_GDB_REG_SIZE 64
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#define GDB_SIZEOF_REG sizeof(u64)
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#endif
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#else
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#error "Need to set KGDB_GDB_REG_SIZE for MIPS ISA"
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#endif /* _MIPS_ISA */
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#define BUFMAX 2048
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#if (KGDB_GDB_REG_SIZE == 32)
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#define NUMREGBYTES (90*sizeof(u32))
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#define NUMCRITREGBYTES (12*sizeof(u32))
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#else
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#define NUMREGBYTES (90*sizeof(u64))
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#define NUMCRITREGBYTES (12*sizeof(u64))
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#endif
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#define DBG_MAX_REG_NUM 72
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#define NUMREGBYTES (DBG_MAX_REG_NUM * sizeof(GDB_SIZEOF_REG))
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#define NUMCRITREGBYTES (12 * sizeof(GDB_SIZEOF_REG))
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#define BREAK_INSTR_SIZE 4
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#define CACHE_FLUSH_IS_SAFE 0
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@ -50,6 +50,151 @@ static struct hard_trap_info {
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{ 0, 0} /* Must be last */
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};
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struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] =
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{
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{ "zero", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[0]) },
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{ "at", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[1]) },
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{ "v0", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[2]) },
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{ "v1", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[3]) },
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{ "a0", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[4]) },
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{ "a1", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[5]) },
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{ "a2", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[6]) },
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{ "a3", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[7]) },
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{ "t0", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[8]) },
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{ "t1", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[9]) },
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{ "t2", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[10]) },
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{ "t3", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[11]) },
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{ "t4", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[12]) },
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{ "t5", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[13]) },
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{ "t6", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[14]) },
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{ "t7", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[15]) },
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{ "s0", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[16]) },
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{ "s1", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[17]) },
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{ "s2", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[18]) },
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{ "s3", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[19]) },
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{ "s4", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[20]) },
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{ "s5", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[21]) },
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{ "s6", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[22]) },
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{ "s7", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[23]) },
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{ "t8", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[24]) },
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{ "t9", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[25]) },
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{ "k0", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[26]) },
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{ "k1", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[27]) },
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{ "gp", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[28]) },
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{ "sp", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[29]) },
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{ "s8", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[30]) },
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{ "ra", GDB_SIZEOF_REG, offsetof(struct pt_regs, regs[31]) },
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{ "sr", GDB_SIZEOF_REG, offsetof(struct pt_regs, cp0_status) },
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{ "lo", GDB_SIZEOF_REG, offsetof(struct pt_regs, lo) },
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{ "hi", GDB_SIZEOF_REG, offsetof(struct pt_regs, hi) },
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{ "bad", GDB_SIZEOF_REG, offsetof(struct pt_regs, cp0_badvaddr) },
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{ "cause", GDB_SIZEOF_REG, offsetof(struct pt_regs, cp0_cause) },
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{ "pc", GDB_SIZEOF_REG, offsetof(struct pt_regs, cp0_epc) },
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{ "f0", GDB_SIZEOF_REG, 0 },
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{ "f1", GDB_SIZEOF_REG, 1 },
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{ "f2", GDB_SIZEOF_REG, 2 },
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{ "f3", GDB_SIZEOF_REG, 3 },
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{ "f4", GDB_SIZEOF_REG, 4 },
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{ "f5", GDB_SIZEOF_REG, 5 },
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{ "f6", GDB_SIZEOF_REG, 6 },
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{ "f7", GDB_SIZEOF_REG, 7 },
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{ "f8", GDB_SIZEOF_REG, 8 },
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{ "f9", GDB_SIZEOF_REG, 9 },
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{ "f10", GDB_SIZEOF_REG, 10 },
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{ "f11", GDB_SIZEOF_REG, 11 },
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{ "f12", GDB_SIZEOF_REG, 12 },
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{ "f13", GDB_SIZEOF_REG, 13 },
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{ "f14", GDB_SIZEOF_REG, 14 },
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{ "f15", GDB_SIZEOF_REG, 15 },
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{ "f16", GDB_SIZEOF_REG, 16 },
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{ "f17", GDB_SIZEOF_REG, 17 },
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{ "f18", GDB_SIZEOF_REG, 18 },
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{ "f19", GDB_SIZEOF_REG, 19 },
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{ "f20", GDB_SIZEOF_REG, 20 },
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{ "f21", GDB_SIZEOF_REG, 21 },
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{ "f22", GDB_SIZEOF_REG, 22 },
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{ "f23", GDB_SIZEOF_REG, 23 },
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{ "f24", GDB_SIZEOF_REG, 24 },
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{ "f25", GDB_SIZEOF_REG, 25 },
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{ "f26", GDB_SIZEOF_REG, 26 },
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{ "f27", GDB_SIZEOF_REG, 27 },
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{ "f28", GDB_SIZEOF_REG, 28 },
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{ "f29", GDB_SIZEOF_REG, 29 },
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{ "f30", GDB_SIZEOF_REG, 30 },
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{ "f31", GDB_SIZEOF_REG, 31 },
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{ "fsr", GDB_SIZEOF_REG, 0 },
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{ "fir", GDB_SIZEOF_REG, 0 },
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};
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int dbg_set_reg(int regno, void *mem, struct pt_regs *regs)
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{
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int fp_reg;
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if (regno < 0 || regno >= DBG_MAX_REG_NUM)
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return -EINVAL;
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if (dbg_reg_def[regno].offset != -1 && regno < 38) {
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memcpy((void *)regs + dbg_reg_def[regno].offset, mem,
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dbg_reg_def[regno].size);
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} else if (current && dbg_reg_def[regno].offset != -1 && regno < 72) {
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/* FP registers 38 -> 69 */
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if (!(regs->cp0_status & ST0_CU1))
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return 0;
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if (regno == 70) {
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/* Process the fcr31/fsr (register 70) */
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memcpy((void *)¤t->thread.fpu.fcr31, mem,
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dbg_reg_def[regno].size);
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goto out_save;
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} else if (regno == 71) {
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/* Ignore the fir (register 71) */
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goto out_save;
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}
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fp_reg = dbg_reg_def[regno].offset;
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memcpy((void *)¤t->thread.fpu.fpr[fp_reg], mem,
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dbg_reg_def[regno].size);
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out_save:
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restore_fp(current);
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}
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return 0;
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}
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char *dbg_get_reg(int regno, void *mem, struct pt_regs *regs)
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{
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int fp_reg;
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if (regno >= DBG_MAX_REG_NUM || regno < 0)
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return NULL;
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if (dbg_reg_def[regno].offset != -1 && regno < 38) {
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/* First 38 registers */
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memcpy(mem, (void *)regs + dbg_reg_def[regno].offset,
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dbg_reg_def[regno].size);
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} else if (current && dbg_reg_def[regno].offset != -1 && regno < 72) {
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/* FP registers 38 -> 69 */
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if (!(regs->cp0_status & ST0_CU1))
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goto out;
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save_fp(current);
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if (regno == 70) {
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/* Process the fcr31/fsr (register 70) */
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memcpy(mem, (void *)¤t->thread.fpu.fcr31,
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dbg_reg_def[regno].size);
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goto out;
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} else if (regno == 71) {
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/* Ignore the fir (register 71) */
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memset(mem, 0, dbg_reg_def[regno].size);
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goto out;
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}
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fp_reg = dbg_reg_def[regno].offset;
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memcpy(mem, (void *)¤t->thread.fpu.fpr[fp_reg],
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dbg_reg_def[regno].size);
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}
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out:
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return dbg_reg_def[regno].name;
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}
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void arch_kgdb_breakpoint(void)
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{
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__asm__ __volatile__(
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@ -84,64 +229,6 @@ static int compute_signal(int tt)
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return SIGHUP; /* default for things we don't know about */
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}
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void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
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{
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int reg;
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#if (KGDB_GDB_REG_SIZE == 32)
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u32 *ptr = (u32 *)gdb_regs;
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#else
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u64 *ptr = (u64 *)gdb_regs;
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#endif
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for (reg = 0; reg < 32; reg++)
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*(ptr++) = regs->regs[reg];
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*(ptr++) = regs->cp0_status;
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*(ptr++) = regs->lo;
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*(ptr++) = regs->hi;
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*(ptr++) = regs->cp0_badvaddr;
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*(ptr++) = regs->cp0_cause;
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*(ptr++) = regs->cp0_epc;
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/* FP REGS */
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if (!(current && (regs->cp0_status & ST0_CU1)))
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return;
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save_fp(current);
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for (reg = 0; reg < 32; reg++)
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*(ptr++) = current->thread.fpu.fpr[reg];
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}
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void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *regs)
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{
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int reg;
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#if (KGDB_GDB_REG_SIZE == 32)
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const u32 *ptr = (u32 *)gdb_regs;
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#else
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const u64 *ptr = (u64 *)gdb_regs;
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#endif
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for (reg = 0; reg < 32; reg++)
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regs->regs[reg] = *(ptr++);
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regs->cp0_status = *(ptr++);
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regs->lo = *(ptr++);
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regs->hi = *(ptr++);
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regs->cp0_badvaddr = *(ptr++);
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regs->cp0_cause = *(ptr++);
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regs->cp0_epc = *(ptr++);
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/* FP REGS from current */
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if (!(current && (regs->cp0_status & ST0_CU1)))
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return;
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for (reg = 0; reg < 32; reg++)
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current->thread.fpu.fpr[reg] = *(ptr++);
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restore_fp(current);
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}
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/*
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* Similar to regs_to_gdb_regs() except that process is sleeping and so
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* we may not be able to get all the info.
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