diff options
Diffstat (limited to 'src/third_party/unwind/dist/src/dwarf/Gexpr.c')
| -rw-r--r-- | src/third_party/unwind/dist/src/dwarf/Gexpr.c | 702 |
1 files changed, 702 insertions, 0 deletions
diff --git a/src/third_party/unwind/dist/src/dwarf/Gexpr.c b/src/third_party/unwind/dist/src/dwarf/Gexpr.c new file mode 100644 index 00000000000..2af454332dd --- /dev/null +++ b/src/third_party/unwind/dist/src/dwarf/Gexpr.c @@ -0,0 +1,702 @@ +/* libunwind - a platform-independent unwind library + Copyright (c) 2003, 2005 Hewlett-Packard Development Company, L.P. + Contributed by David Mosberger-Tang <davidm@hpl.hp.com> + +This file is part of libunwind. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ + +#include "dwarf_i.h" +#include "libunwind_i.h" + +/* The "pick" operator provides an index range of 0..255 indicating + that the stack could at least have a depth of up to 256 elements, + but the GCC unwinder restricts the depth to 64, which seems + reasonable so we use the same value here. */ +#define MAX_EXPR_STACK_SIZE 64 + +#define NUM_OPERANDS(signature) (((signature) >> 6) & 0x3) +#define OPND1_TYPE(signature) (((signature) >> 3) & 0x7) +#define OPND2_TYPE(signature) (((signature) >> 0) & 0x7) + +#define OPND_SIGNATURE(n, t1, t2) (((n) << 6) | ((t1) << 3) | ((t2) << 0)) +#define OPND1(t1) OPND_SIGNATURE(1, t1, 0) +#define OPND2(t1, t2) OPND_SIGNATURE(2, t1, t2) + +#define VAL8 0x0 +#define VAL16 0x1 +#define VAL32 0x2 +#define VAL64 0x3 +#define ULEB128 0x4 +#define SLEB128 0x5 +#define OFFSET 0x6 /* 32-bit offset for 32-bit DWARF, 64-bit otherwise */ +#define ADDR 0x7 /* Machine address. */ + +static const uint8_t operands[256] = + { + [DW_OP_addr] = OPND1 (ADDR), + [DW_OP_const1u] = OPND1 (VAL8), + [DW_OP_const1s] = OPND1 (VAL8), + [DW_OP_const2u] = OPND1 (VAL16), + [DW_OP_const2s] = OPND1 (VAL16), + [DW_OP_const4u] = OPND1 (VAL32), + [DW_OP_const4s] = OPND1 (VAL32), + [DW_OP_const8u] = OPND1 (VAL64), + [DW_OP_const8s] = OPND1 (VAL64), + [DW_OP_constu] = OPND1 (ULEB128), + [DW_OP_consts] = OPND1 (SLEB128), + [DW_OP_pick] = OPND1 (VAL8), + [DW_OP_plus_uconst] = OPND1 (ULEB128), + [DW_OP_skip] = OPND1 (VAL16), + [DW_OP_bra] = OPND1 (VAL16), + [DW_OP_breg0 + 0] = OPND1 (SLEB128), + [DW_OP_breg0 + 1] = OPND1 (SLEB128), + [DW_OP_breg0 + 2] = OPND1 (SLEB128), + [DW_OP_breg0 + 3] = OPND1 (SLEB128), + [DW_OP_breg0 + 4] = OPND1 (SLEB128), + [DW_OP_breg0 + 5] = OPND1 (SLEB128), + [DW_OP_breg0 + 6] = OPND1 (SLEB128), + [DW_OP_breg0 + 7] = OPND1 (SLEB128), + [DW_OP_breg0 + 8] = OPND1 (SLEB128), + [DW_OP_breg0 + 9] = OPND1 (SLEB128), + [DW_OP_breg0 + 10] = OPND1 (SLEB128), + [DW_OP_breg0 + 11] = OPND1 (SLEB128), + [DW_OP_breg0 + 12] = OPND1 (SLEB128), + [DW_OP_breg0 + 13] = OPND1 (SLEB128), + [DW_OP_breg0 + 14] = OPND1 (SLEB128), + [DW_OP_breg0 + 15] = OPND1 (SLEB128), + [DW_OP_breg0 + 16] = OPND1 (SLEB128), + [DW_OP_breg0 + 17] = OPND1 (SLEB128), + [DW_OP_breg0 + 18] = OPND1 (SLEB128), + [DW_OP_breg0 + 19] = OPND1 (SLEB128), + [DW_OP_breg0 + 20] = OPND1 (SLEB128), + [DW_OP_breg0 + 21] = OPND1 (SLEB128), + [DW_OP_breg0 + 22] = OPND1 (SLEB128), + [DW_OP_breg0 + 23] = OPND1 (SLEB128), + [DW_OP_breg0 + 24] = OPND1 (SLEB128), + [DW_OP_breg0 + 25] = OPND1 (SLEB128), + [DW_OP_breg0 + 26] = OPND1 (SLEB128), + [DW_OP_breg0 + 27] = OPND1 (SLEB128), + [DW_OP_breg0 + 28] = OPND1 (SLEB128), + [DW_OP_breg0 + 29] = OPND1 (SLEB128), + [DW_OP_breg0 + 30] = OPND1 (SLEB128), + [DW_OP_breg0 + 31] = OPND1 (SLEB128), + [DW_OP_regx] = OPND1 (ULEB128), + [DW_OP_fbreg] = OPND1 (SLEB128), + [DW_OP_bregx] = OPND2 (ULEB128, SLEB128), + [DW_OP_piece] = OPND1 (ULEB128), + [DW_OP_deref_size] = OPND1 (VAL8), + [DW_OP_xderef_size] = OPND1 (VAL8), + [DW_OP_call2] = OPND1 (VAL16), + [DW_OP_call4] = OPND1 (VAL32), + [DW_OP_call_ref] = OPND1 (OFFSET) + }; + +static inline unw_sword_t +sword (unw_addr_space_t as, unw_word_t val) +{ + switch (dwarf_addr_size (as)) + { + case 1: return (int8_t) val; + case 2: return (int16_t) val; + case 4: return (int32_t) val; + case 8: return (int64_t) val; + default: abort (); + } +} + +static inline unw_word_t +read_operand (unw_addr_space_t as, unw_accessors_t *a, + unw_word_t *addr, int operand_type, unw_word_t *val, void *arg) +{ + uint8_t u8; + uint16_t u16; + uint32_t u32; + uint64_t u64; + int ret; + + if (operand_type == ADDR) + switch (dwarf_addr_size (as)) + { + case 1: operand_type = VAL8; break; + case 2: operand_type = VAL16; break; + case 4: operand_type = VAL32; break; + case 8: operand_type = VAL64; break; + default: abort (); + } + + switch (operand_type) + { + case VAL8: + ret = dwarf_readu8 (as, a, addr, &u8, arg); + if (ret < 0) + return ret; + *val = u8; + break; + + case VAL16: + ret = dwarf_readu16 (as, a, addr, &u16, arg); + if (ret < 0) + return ret; + *val = u16; + break; + + case VAL32: + ret = dwarf_readu32 (as, a, addr, &u32, arg); + if (ret < 0) + return ret; + *val = u32; + break; + + case VAL64: + ret = dwarf_readu64 (as, a, addr, &u64, arg); + if (ret < 0) + return ret; + *val = u64; + break; + + case ULEB128: + ret = dwarf_read_uleb128 (as, a, addr, val, arg); + break; + + case SLEB128: + ret = dwarf_read_sleb128 (as, a, addr, val, arg); + break; + + case OFFSET: /* only used by DW_OP_call_ref, which we don't implement */ + default: + Debug (1, "Unexpected operand type %d\n", operand_type); + ret = -UNW_EINVAL; + } + return ret; +} + +HIDDEN int +dwarf_stack_aligned(struct dwarf_cursor *c, unw_word_t cfa_addr, + unw_word_t rbp_addr, unw_word_t *cfa_offset) { + unw_accessors_t *a; + int ret; + void *arg; + unw_word_t len; + uint8_t opcode; + unw_word_t operand1; + + a = unw_get_accessors_int (c->as); + arg = c->as_arg; + + ret = dwarf_read_uleb128(c->as, a, &rbp_addr, &len, arg); + if (len != 2 || ret < 0) + return 0; + + ret = dwarf_readu8(c->as, a, &rbp_addr, &opcode, arg); + if (ret < 0 || opcode != DW_OP_breg6) + return 0; + + ret = read_operand(c->as, a, &rbp_addr, + OPND1_TYPE(operands[opcode]), &operand1, arg); + + if (ret < 0 || operand1 != 0) + return 0; + + ret = dwarf_read_uleb128(c->as, a, &cfa_addr, &len, arg); + if (ret < 0 || len != 3) + return 0; + + ret = dwarf_readu8(c->as, a, &cfa_addr, &opcode, arg); + if (ret < 0 || opcode != DW_OP_breg6) + return 0; + + ret = read_operand(c->as, a, &cfa_addr, + OPND1_TYPE(operands[opcode]), &operand1, arg); + if (ret < 0) + return 0; + + ret = dwarf_readu8(c->as, a, &cfa_addr, &opcode, arg); + if (ret < 0 || opcode != DW_OP_deref) + return 0; + + *cfa_offset = operand1; + return 1; +} + +HIDDEN int +dwarf_eval_expr (struct dwarf_cursor *c, unw_word_t stack_val, unw_word_t *addr, + unw_word_t len, unw_word_t *valp, int *is_register) +{ + unw_word_t operand1 = 0, operand2 = 0, tmp1, tmp2 = 0, tmp3, end_addr; + uint8_t opcode, operands_signature, u8; + unw_addr_space_t as; + unw_accessors_t *a; + void *arg; + unw_word_t stack[MAX_EXPR_STACK_SIZE]; + unsigned int tos = 0; + uint16_t u16; + uint32_t u32; + uint64_t u64; + int ret; +# define pop() \ +({ \ + if ((tos - 1) >= MAX_EXPR_STACK_SIZE) \ + { \ + Debug (1, "Stack underflow\n"); \ + return -UNW_EINVAL; \ + } \ + stack[--tos]; \ +}) +# define push(x) \ +do { \ + unw_word_t _x = (x); \ + if (tos >= MAX_EXPR_STACK_SIZE) \ + { \ + Debug (1, "Stack overflow\n"); \ + return -UNW_EINVAL; \ + } \ + stack[tos++] = _x; \ +} while (0) +# define pick(n) \ +({ \ + unsigned int _index = tos - 1 - (n); \ + if (_index >= MAX_EXPR_STACK_SIZE) \ + { \ + Debug (1, "Out-of-stack pick\n"); \ + return -UNW_EINVAL; \ + } \ + stack[_index]; \ +}) + + as = c->as; + arg = c->as_arg; + a = unw_get_accessors_int (as); + end_addr = *addr + len; + *is_register = 0; + + Debug (14, "len=%lu, pushing initial value=0x%lx\n", + (unsigned long) len, (unsigned long) stack_val); + + /* The DWARF standard requires the current CFA to be pushed onto the stack */ + /* before evaluating DW_CFA_expression and DW_CFA_val_expression programs. */ + /* DW_CFA_def_cfa_expressions do not take an initial value, but we push on */ + /* a dummy value to keep this logic consistent. */ + push (stack_val); + + while (*addr < end_addr) + { + if ((ret = dwarf_readu8 (as, a, addr, &opcode, arg)) < 0) + return ret; + + operands_signature = operands[opcode]; + + if (unlikely (NUM_OPERANDS (operands_signature) > 0)) + { + if ((ret = read_operand (as, a, addr, + OPND1_TYPE (operands_signature), + &operand1, arg)) < 0) + return ret; + if (NUM_OPERANDS (operands_signature) > 1) + if ((ret = read_operand (as, a, addr, + OPND2_TYPE (operands_signature), + &operand2, arg)) < 0) + return ret; + } + + switch ((dwarf_expr_op_t) opcode) + { + case DW_OP_lit0: case DW_OP_lit1: case DW_OP_lit2: + case DW_OP_lit3: case DW_OP_lit4: case DW_OP_lit5: + case DW_OP_lit6: case DW_OP_lit7: case DW_OP_lit8: + case DW_OP_lit9: case DW_OP_lit10: case DW_OP_lit11: + case DW_OP_lit12: case DW_OP_lit13: case DW_OP_lit14: + case DW_OP_lit15: case DW_OP_lit16: case DW_OP_lit17: + case DW_OP_lit18: case DW_OP_lit19: case DW_OP_lit20: + case DW_OP_lit21: case DW_OP_lit22: case DW_OP_lit23: + case DW_OP_lit24: case DW_OP_lit25: case DW_OP_lit26: + case DW_OP_lit27: case DW_OP_lit28: case DW_OP_lit29: + case DW_OP_lit30: case DW_OP_lit31: + Debug (15, "OP_lit(%d)\n", (int) opcode - DW_OP_lit0); + push (opcode - DW_OP_lit0); + break; + + case DW_OP_breg0: case DW_OP_breg1: case DW_OP_breg2: + case DW_OP_breg3: case DW_OP_breg4: case DW_OP_breg5: + case DW_OP_breg6: case DW_OP_breg7: case DW_OP_breg8: + case DW_OP_breg9: case DW_OP_breg10: case DW_OP_breg11: + case DW_OP_breg12: case DW_OP_breg13: case DW_OP_breg14: + case DW_OP_breg15: case DW_OP_breg16: case DW_OP_breg17: + case DW_OP_breg18: case DW_OP_breg19: case DW_OP_breg20: + case DW_OP_breg21: case DW_OP_breg22: case DW_OP_breg23: + case DW_OP_breg24: case DW_OP_breg25: case DW_OP_breg26: + case DW_OP_breg27: case DW_OP_breg28: case DW_OP_breg29: + case DW_OP_breg30: case DW_OP_breg31: + Debug (15, "OP_breg(r%d,0x%lx)\n", + (int) opcode - DW_OP_breg0, (unsigned long) operand1); + if ((ret = unw_get_reg (dwarf_to_cursor (c), + dwarf_to_unw_regnum (opcode - DW_OP_breg0), + &tmp1)) < 0) + return ret; + push (tmp1 + operand1); + break; + + case DW_OP_bregx: + Debug (15, "OP_bregx(r%d,0x%lx)\n", + (int) operand1, (unsigned long) operand2); + if ((ret = unw_get_reg (dwarf_to_cursor (c), + dwarf_to_unw_regnum (operand1), &tmp1)) < 0) + return ret; + push (tmp1 + operand2); + break; + + case DW_OP_reg0: case DW_OP_reg1: case DW_OP_reg2: + case DW_OP_reg3: case DW_OP_reg4: case DW_OP_reg5: + case DW_OP_reg6: case DW_OP_reg7: case DW_OP_reg8: + case DW_OP_reg9: case DW_OP_reg10: case DW_OP_reg11: + case DW_OP_reg12: case DW_OP_reg13: case DW_OP_reg14: + case DW_OP_reg15: case DW_OP_reg16: case DW_OP_reg17: + case DW_OP_reg18: case DW_OP_reg19: case DW_OP_reg20: + case DW_OP_reg21: case DW_OP_reg22: case DW_OP_reg23: + case DW_OP_reg24: case DW_OP_reg25: case DW_OP_reg26: + case DW_OP_reg27: case DW_OP_reg28: case DW_OP_reg29: + case DW_OP_reg30: case DW_OP_reg31: + Debug (15, "OP_reg(r%d)\n", (int) opcode - DW_OP_reg0); + *valp = dwarf_to_unw_regnum (opcode - DW_OP_reg0); + *is_register = 1; + return 0; + + case DW_OP_regx: + Debug (15, "OP_regx(r%d)\n", (int) operand1); + *valp = dwarf_to_unw_regnum (operand1); + *is_register = 1; + return 0; + + case DW_OP_addr: + case DW_OP_const1u: + case DW_OP_const2u: + case DW_OP_const4u: + case DW_OP_const8u: + case DW_OP_constu: + case DW_OP_const8s: + case DW_OP_consts: + Debug (15, "OP_const(0x%lx)\n", (unsigned long) operand1); + push (operand1); + break; + + case DW_OP_const1s: + if (operand1 & 0x80) + operand1 |= ((unw_word_t) -1) << 8; + Debug (15, "OP_const1s(%ld)\n", (long) operand1); + push (operand1); + break; + + case DW_OP_const2s: + if (operand1 & 0x8000) + operand1 |= ((unw_word_t) -1) << 16; + Debug (15, "OP_const2s(%ld)\n", (long) operand1); + push (operand1); + break; + + case DW_OP_const4s: + if (operand1 & 0x80000000) + operand1 |= (((unw_word_t) -1) << 16) << 16; + Debug (15, "OP_const4s(%ld)\n", (long) operand1); + push (operand1); + break; + + case DW_OP_deref: + Debug (15, "OP_deref\n"); + tmp1 = pop (); + if ((ret = dwarf_readw (as, a, &tmp1, &tmp2, arg)) < 0) + return ret; + push (tmp2); + break; + + case DW_OP_deref_size: + Debug (15, "OP_deref_size(%d)\n", (int) operand1); + tmp1 = pop (); + switch (operand1) + { + default: + Debug (1, "Unexpected DW_OP_deref_size size %d\n", + (int) operand1); + return -UNW_EINVAL; + + case 1: + if ((ret = dwarf_readu8 (as, a, &tmp1, &u8, arg)) < 0) + return ret; + tmp2 = u8; + break; + + case 2: + if ((ret = dwarf_readu16 (as, a, &tmp1, &u16, arg)) < 0) + return ret; + tmp2 = u16; + break; + + case 3: + case 4: + if ((ret = dwarf_readu32 (as, a, &tmp1, &u32, arg)) < 0) + return ret; + tmp2 = u32; + if (operand1 == 3) + { + if (dwarf_is_big_endian (as)) + tmp2 >>= 8; + else + tmp2 &= 0xffffff; + } + break; + case 5: + case 6: + case 7: + case 8: + if ((ret = dwarf_readu64 (as, a, &tmp1, &u64, arg)) < 0) + return ret; + tmp2 = u64; + if (operand1 != 8) + { + if (dwarf_is_big_endian (as)) + tmp2 >>= 64 - 8 * operand1; + else + tmp2 &= (~ (unw_word_t) 0) << (8 * operand1); + } + break; + } + push (tmp2); + break; + + case DW_OP_dup: + Debug (15, "OP_dup\n"); + push (pick (0)); + break; + + case DW_OP_drop: + Debug (15, "OP_drop\n"); + (void) pop (); + break; + + case DW_OP_pick: + Debug (15, "OP_pick(%d)\n", (int) operand1); + push (pick (operand1)); + break; + + case DW_OP_over: + Debug (15, "OP_over\n"); + push (pick (1)); + break; + + case DW_OP_swap: + Debug (15, "OP_swap\n"); + tmp1 = pop (); + tmp2 = pop (); + push (tmp1); + push (tmp2); + break; + + case DW_OP_rot: + Debug (15, "OP_rot\n"); + tmp1 = pop (); + tmp2 = pop (); + tmp3 = pop (); + push (tmp1); + push (tmp3); + push (tmp2); + break; + + case DW_OP_abs: + Debug (15, "OP_abs\n"); + tmp1 = pop (); + if (tmp1 & ((unw_word_t) 1 << (8 * dwarf_addr_size (as) - 1))) + tmp1 = -tmp1; + push (tmp1); + break; + + case DW_OP_and: + Debug (15, "OP_and\n"); + tmp1 = pop (); + tmp2 = pop (); + push (tmp1 & tmp2); + break; + + case DW_OP_div: + Debug (15, "OP_div\n"); + tmp1 = pop (); + tmp2 = pop (); + if (tmp1) + tmp1 = sword (as, tmp2) / sword (as, tmp1); + push (tmp1); + break; + + case DW_OP_minus: + Debug (15, "OP_minus\n"); + tmp1 = pop (); + tmp2 = pop (); + tmp1 = tmp2 - tmp1; + push (tmp1); + break; + + case DW_OP_mod: + Debug (15, "OP_mod\n"); + tmp1 = pop (); + tmp2 = pop (); + if (tmp1) + tmp1 = tmp2 % tmp1; + push (tmp1); + break; + + case DW_OP_mul: + Debug (15, "OP_mul\n"); + tmp1 = pop (); + tmp2 = pop (); + if (tmp1) + tmp1 = tmp2 * tmp1; + push (tmp1); + break; + + case DW_OP_neg: + Debug (15, "OP_neg\n"); + push (-pop ()); + break; + + case DW_OP_not: + Debug (15, "OP_not\n"); + push (~pop ()); + break; + + case DW_OP_or: + Debug (15, "OP_or\n"); + tmp1 = pop (); + tmp2 = pop (); + push (tmp1 | tmp2); + break; + + case DW_OP_plus: + Debug (15, "OP_plus\n"); + tmp1 = pop (); + tmp2 = pop (); + push (tmp1 + tmp2); + break; + + case DW_OP_plus_uconst: + Debug (15, "OP_plus_uconst(%lu)\n", (unsigned long) operand1); + tmp1 = pop (); + push (tmp1 + operand1); + break; + + case DW_OP_shl: + Debug (15, "OP_shl\n"); + tmp1 = pop (); + tmp2 = pop (); + push (tmp2 << tmp1); + break; + + case DW_OP_shr: + Debug (15, "OP_shr\n"); + tmp1 = pop (); + tmp2 = pop (); + push (tmp2 >> tmp1); + break; + + case DW_OP_shra: + Debug (15, "OP_shra\n"); + tmp1 = pop (); + tmp2 = pop (); + push (sword (as, tmp2) >> tmp1); + break; + + case DW_OP_xor: + Debug (15, "OP_xor\n"); + tmp1 = pop (); + tmp2 = pop (); + push (tmp1 ^ tmp2); + break; + + case DW_OP_le: + Debug (15, "OP_le\n"); + tmp1 = pop (); + tmp2 = pop (); + push (sword (as, tmp2) <= sword (as, tmp1)); + break; + + case DW_OP_ge: + Debug (15, "OP_ge\n"); + tmp1 = pop (); + tmp2 = pop (); + push (sword (as, tmp2) >= sword (as, tmp1)); + break; + + case DW_OP_eq: + Debug (15, "OP_eq\n"); + tmp1 = pop (); + tmp2 = pop (); + push (sword (as, tmp2) == sword (as, tmp1)); + break; + + case DW_OP_lt: + Debug (15, "OP_lt\n"); + tmp1 = pop (); + tmp2 = pop (); + push (sword (as, tmp2) < sword (as, tmp1)); + break; + + case DW_OP_gt: + Debug (15, "OP_gt\n"); + tmp1 = pop (); + tmp2 = pop (); + push (sword (as, tmp2) > sword (as, tmp1)); + break; + + case DW_OP_ne: + Debug (15, "OP_ne\n"); + tmp1 = pop (); + tmp2 = pop (); + push (sword (as, tmp2) != sword (as, tmp1)); + break; + + case DW_OP_skip: + Debug (15, "OP_skip(%d)\n", (int16_t) operand1); + *addr += (int16_t) operand1; + break; + + case DW_OP_bra: + Debug (15, "OP_skip(%d)\n", (int16_t) operand1); + tmp1 = pop (); + if (tmp1) + *addr += (int16_t) operand1; + break; + + case DW_OP_nop: + Debug (15, "OP_nop\n"); + break; + + case DW_OP_call2: + case DW_OP_call4: + case DW_OP_call_ref: + case DW_OP_fbreg: + case DW_OP_piece: + case DW_OP_push_object_address: + case DW_OP_xderef: + case DW_OP_xderef_size: + default: + Debug (1, "Unexpected opcode 0x%x\n", opcode); + return -UNW_EINVAL; + } + } + *valp = pop (); + Debug (14, "final value = 0x%lx\n", (unsigned long) *valp); + return 0; +} |