/* 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>
+ Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
This file is part of libunwind.
#include "dwarf_i.h"
#include "libunwind_i.h"
-#define alloc_reg_state() (mempool_alloc (&dwarf_reg_state_pool))
-#define free_reg_state(rs) (mempool_free (&dwarf_reg_state_pool, rs))
+#define alloc_reg_state() (mempool_alloc (&dwarf_reg_state_pool))
+#define free_reg_state(rs) (mempool_free (&dwarf_reg_state_pool, rs))
static inline int
read_regnum (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
- unw_word_t *valp, void *arg)
+ unw_word_t *valp, void *arg)
{
int ret;
static inline void
set_reg (dwarf_state_record_t *sr, unw_word_t regnum, dwarf_where_t where,
- unw_word_t val)
+ unw_word_t val)
{
sr->rs_current.reg[regnum].where = where;
sr->rs_current.reg[regnum].val = val;
/* Run a CFI program to update the register state. */
static int
run_cfi_program (struct dwarf_cursor *c, dwarf_state_record_t *sr,
- unw_word_t ip, unw_word_t *addr, unw_word_t end_addr,
- struct dwarf_cie_info *dci)
+ unw_word_t ip, unw_word_t *addr, unw_word_t end_addr,
+ struct dwarf_cie_info *dci)
{
unw_word_t curr_ip, operand = 0, regnum, val, len, fde_encoding;
dwarf_reg_state_t *rs_stack = NULL, *new_rs, *old_rs;
while (curr_ip <= ip && *addr < end_addr)
{
if ((ret = dwarf_readu8 (as, a, addr, &op, arg)) < 0)
- return ret;
+ return ret;
if (op & DWARF_CFA_OPCODE_MASK)
- {
- operand = op & DWARF_CFA_OPERAND_MASK;
- op &= ~DWARF_CFA_OPERAND_MASK;
- }
+ {
+ operand = op & DWARF_CFA_OPERAND_MASK;
+ op &= ~DWARF_CFA_OPERAND_MASK;
+ }
switch ((dwarf_cfa_t) op)
- {
- case DW_CFA_advance_loc:
- curr_ip += operand * dci->code_align;
- Debug (15, "CFA_advance_loc to 0x%lx\n", (long) curr_ip);
- break;
-
- case DW_CFA_advance_loc1:
- if ((ret = dwarf_readu8 (as, a, addr, &u8, arg)) < 0)
- goto fail;
- curr_ip += u8 * dci->code_align;
- Debug (15, "CFA_advance_loc1 to 0x%lx\n", (long) curr_ip);
- break;
-
- case DW_CFA_advance_loc2:
- if ((ret = dwarf_readu16 (as, a, addr, &u16, arg)) < 0)
- goto fail;
- curr_ip += u16 * dci->code_align;
- Debug (15, "CFA_advance_loc2 to 0x%lx\n", (long) curr_ip);
- break;
-
- case DW_CFA_advance_loc4:
- if ((ret = dwarf_readu32 (as, a, addr, &u32, arg)) < 0)
- goto fail;
- curr_ip += u32 * dci->code_align;
- Debug (15, "CFA_advance_loc4 to 0x%lx\n", (long) curr_ip);
- break;
-
- case DW_CFA_MIPS_advance_loc8:
+ {
+ case DW_CFA_advance_loc:
+ curr_ip += operand * dci->code_align;
+ Debug (15, "CFA_advance_loc to 0x%lx\n", (long) curr_ip);
+ break;
+
+ case DW_CFA_advance_loc1:
+ if ((ret = dwarf_readu8 (as, a, addr, &u8, arg)) < 0)
+ goto fail;
+ curr_ip += u8 * dci->code_align;
+ Debug (15, "CFA_advance_loc1 to 0x%lx\n", (long) curr_ip);
+ break;
+
+ case DW_CFA_advance_loc2:
+ if ((ret = dwarf_readu16 (as, a, addr, &u16, arg)) < 0)
+ goto fail;
+ curr_ip += u16 * dci->code_align;
+ Debug (15, "CFA_advance_loc2 to 0x%lx\n", (long) curr_ip);
+ break;
+
+ case DW_CFA_advance_loc4:
+ if ((ret = dwarf_readu32 (as, a, addr, &u32, arg)) < 0)
+ goto fail;
+ curr_ip += u32 * dci->code_align;
+ Debug (15, "CFA_advance_loc4 to 0x%lx\n", (long) curr_ip);
+ break;
+
+ case DW_CFA_MIPS_advance_loc8:
#ifdef UNW_TARGET_MIPS
- {
- uint64_t u64;
-
- if ((ret = dwarf_readu64 (as, a, addr, &u64, arg)) < 0)
- goto fail;
- curr_ip += u64 * dci->code_align;
- Debug (15, "CFA_MIPS_advance_loc8\n");
- break;
- }
+ {
+ uint64_t u64;
+
+ if ((ret = dwarf_readu64 (as, a, addr, &u64, arg)) < 0)
+ goto fail;
+ curr_ip += u64 * dci->code_align;
+ Debug (15, "CFA_MIPS_advance_loc8\n");
+ break;
+ }
#else
- Debug (1, "DW_CFA_MIPS_advance_loc8 on non-MIPS target\n");
- ret = -UNW_EINVAL;
- goto fail;
+ Debug (1, "DW_CFA_MIPS_advance_loc8 on non-MIPS target\n");
+ ret = -UNW_EINVAL;
+ goto fail;
#endif
- case DW_CFA_offset:
- regnum = operand;
- if (regnum >= DWARF_NUM_PRESERVED_REGS)
- {
- Debug (1, "Invalid register number %u in DW_cfa_OFFSET\n",
- (unsigned int) regnum);
- ret = -UNW_EBADREG;
- goto fail;
- }
- if ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0)
- goto fail;
- set_reg (sr, regnum, DWARF_WHERE_CFAREL, val * dci->data_align);
- Debug (15, "CFA_offset r%lu at cfa+0x%lx\n",
- (long) regnum, (long) (val * dci->data_align));
- break;
-
- case DW_CFA_offset_extended:
- if (((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
- || ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0))
- goto fail;
- set_reg (sr, regnum, DWARF_WHERE_CFAREL, val * dci->data_align);
- Debug (15, "CFA_offset_extended r%lu at cf+0x%lx\n",
- (long) regnum, (long) (val * dci->data_align));
- break;
-
- case DW_CFA_offset_extended_sf:
- if (((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
- || ((ret = dwarf_read_sleb128 (as, a, addr, &val, arg)) < 0))
- goto fail;
- set_reg (sr, regnum, DWARF_WHERE_CFAREL, val * dci->data_align);
- Debug (15, "CFA_offset_extended_sf r%lu at cf+0x%lx\n",
- (long) regnum, (long) (val * dci->data_align));
- break;
-
- case DW_CFA_restore:
- regnum = operand;
- if (regnum >= DWARF_NUM_PRESERVED_REGS)
- {
- Debug (1, "Invalid register number %u in DW_CFA_restore\n",
- (unsigned int) regnum);
- ret = -UNW_EINVAL;
- goto fail;
- }
- sr->rs_current.reg[regnum] = sr->rs_initial.reg[regnum];
- Debug (15, "CFA_restore r%lu\n", (long) regnum);
- break;
-
- case DW_CFA_restore_extended:
- if ((ret = dwarf_read_uleb128 (as, a, addr, ®num, arg)) < 0)
- goto fail;
- if (regnum >= DWARF_NUM_PRESERVED_REGS)
- {
- Debug (1, "Invalid register number %u in "
- "DW_CFA_restore_extended\n", (unsigned int) regnum);
- ret = -UNW_EINVAL;
- goto fail;
- }
- sr->rs_current.reg[regnum] = sr->rs_initial.reg[regnum];
- Debug (15, "CFA_restore_extended r%lu\n", (long) regnum);
- break;
-
- case DW_CFA_nop:
- break;
-
- case DW_CFA_set_loc:
- fde_encoding = dci->fde_encoding;
- if ((ret = dwarf_read_encoded_pointer (as, a, addr, fde_encoding,
- &c->pi, &curr_ip,
- arg)) < 0)
- goto fail;
- Debug (15, "CFA_set_loc to 0x%lx\n", (long) curr_ip);
- break;
-
- case DW_CFA_undefined:
- if ((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
- goto fail;
- set_reg (sr, regnum, DWARF_WHERE_UNDEF, 0);
- Debug (15, "CFA_undefined r%lu\n", (long) regnum);
- break;
-
- case DW_CFA_same_value:
- if ((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
- goto fail;
- set_reg (sr, regnum, DWARF_WHERE_SAME, 0);
- Debug (15, "CFA_same_value r%lu\n", (long) regnum);
- break;
-
- case DW_CFA_register:
- if (((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
- || ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0))
- goto fail;
- set_reg (sr, regnum, DWARF_WHERE_REG, val);
- Debug (15, "CFA_register r%lu to r%lu\n", (long) regnum, (long) val);
- break;
-
- case DW_CFA_remember_state:
- new_rs = alloc_reg_state ();
- if (!new_rs)
- {
- Debug (1, "Out of memory in DW_CFA_remember_state\n");
- ret = -UNW_ENOMEM;
- goto fail;
- }
-
- memcpy (new_rs->reg, sr->rs_current.reg, sizeof (new_rs->reg));
- new_rs->next = rs_stack;
- rs_stack = new_rs;
- Debug (15, "CFA_remember_state\n");
- break;
-
- case DW_CFA_restore_state:
- if (!rs_stack)
- {
- Debug (1, "register-state stack underflow\n");
- ret = -UNW_EINVAL;
- goto fail;
- }
- memcpy (&sr->rs_current.reg, &rs_stack->reg, sizeof (rs_stack->reg));
- old_rs = rs_stack;
- rs_stack = rs_stack->next;
- free_reg_state (old_rs);
- Debug (15, "CFA_restore_state\n");
- break;
-
- case DW_CFA_def_cfa:
- if (((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
- || ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0))
- goto fail;
- set_reg (sr, DWARF_CFA_REG_COLUMN, DWARF_WHERE_REG, regnum);
- set_reg (sr, DWARF_CFA_OFF_COLUMN, 0, val); /* NOT factored! */
- Debug (15, "CFA_def_cfa r%lu+0x%lx\n", (long) regnum, (long) val);
- break;
-
- case DW_CFA_def_cfa_sf:
- if (((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
- || ((ret = dwarf_read_sleb128 (as, a, addr, &val, arg)) < 0))
- goto fail;
- set_reg (sr, DWARF_CFA_REG_COLUMN, DWARF_WHERE_REG, regnum);
- set_reg (sr, DWARF_CFA_OFF_COLUMN, 0,
- val * dci->data_align); /* factored! */
- Debug (15, "CFA_def_cfa_sf r%lu+0x%lx\n",
- (long) regnum, (long) (val * dci->data_align));
- break;
-
- case DW_CFA_def_cfa_register:
- if ((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
- goto fail;
- set_reg (sr, DWARF_CFA_REG_COLUMN, DWARF_WHERE_REG, regnum);
- Debug (15, "CFA_def_cfa_register r%lu\n", (long) regnum);
- break;
-
- case DW_CFA_def_cfa_offset:
- if ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0)
- goto fail;
- set_reg (sr, DWARF_CFA_OFF_COLUMN, 0, val); /* NOT factored! */
- Debug (15, "CFA_def_cfa_offset 0x%lx\n", (long) val);
- break;
-
- case DW_CFA_def_cfa_offset_sf:
- if ((ret = dwarf_read_sleb128 (as, a, addr, &val, arg)) < 0)
- goto fail;
- set_reg (sr, DWARF_CFA_OFF_COLUMN, 0,
- val * dci->data_align); /* factored! */
- Debug (15, "CFA_def_cfa_offset_sf 0x%lx\n",
- (long) (val * dci->data_align));
- break;
-
- case DW_CFA_def_cfa_expression:
- /* Save the address of the DW_FORM_block for later evaluation. */
- set_reg (sr, DWARF_CFA_REG_COLUMN, DWARF_WHERE_EXPR, *addr);
-
- if ((ret = dwarf_read_uleb128 (as, a, addr, &len, arg)) < 0)
- goto fail;
-
- Debug (15, "CFA_def_cfa_expr @ 0x%lx [%lu bytes]\n",
- (long) *addr, (long) len);
- *addr += len;
- break;
-
- case DW_CFA_expression:
- if ((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
- goto fail;
-
- /* Save the address of the DW_FORM_block for later evaluation. */
- set_reg (sr, regnum, DWARF_WHERE_EXPR, *addr);
-
- if ((ret = dwarf_read_uleb128 (as, a, addr, &len, arg)) < 0)
- goto fail;
-
- Debug (15, "CFA_expression r%lu @ 0x%lx [%lu bytes]\n",
- (long) regnum, (long) addr, (long) len);
- *addr += len;
- break;
-
- case DW_CFA_GNU_args_size:
- if ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0)
- goto fail;
- sr->args_size = val;
- Debug (15, "CFA_GNU_args_size %lu\n", (long) val);
- break;
-
- case DW_CFA_GNU_negative_offset_extended:
- /* A comment in GCC says that this is obsoleted by
- DW_CFA_offset_extended_sf, but that it's used by older
- PowerPC code. */
- if (((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
- || ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0))
- goto fail;
- set_reg (sr, regnum, DWARF_WHERE_CFAREL, -(val * dci->data_align));
- Debug (15, "CFA_GNU_negative_offset_extended cfa+0x%lx\n",
- (long) -(val * dci->data_align));
- break;
-
- case DW_CFA_GNU_window_save:
+ case DW_CFA_offset:
+ regnum = operand;
+ if (regnum >= DWARF_NUM_PRESERVED_REGS)
+ {
+ Debug (1, "Invalid register number %u in DW_cfa_OFFSET\n",
+ (unsigned int) regnum);
+ ret = -UNW_EBADREG;
+ goto fail;
+ }
+ if ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0)
+ goto fail;
+ set_reg (sr, regnum, DWARF_WHERE_CFAREL, val * dci->data_align);
+ Debug (15, "CFA_offset r%lu at cfa+0x%lx\n",
+ (long) regnum, (long) (val * dci->data_align));
+ break;
+
+ case DW_CFA_offset_extended:
+ if (((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
+ || ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0))
+ goto fail;
+ set_reg (sr, regnum, DWARF_WHERE_CFAREL, val * dci->data_align);
+ Debug (15, "CFA_offset_extended r%lu at cf+0x%lx\n",
+ (long) regnum, (long) (val * dci->data_align));
+ break;
+
+ case DW_CFA_offset_extended_sf:
+ if (((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
+ || ((ret = dwarf_read_sleb128 (as, a, addr, &val, arg)) < 0))
+ goto fail;
+ set_reg (sr, regnum, DWARF_WHERE_CFAREL, val * dci->data_align);
+ Debug (15, "CFA_offset_extended_sf r%lu at cf+0x%lx\n",
+ (long) regnum, (long) (val * dci->data_align));
+ break;
+
+ case DW_CFA_restore:
+ regnum = operand;
+ if (regnum >= DWARF_NUM_PRESERVED_REGS)
+ {
+ Debug (1, "Invalid register number %u in DW_CFA_restore\n",
+ (unsigned int) regnum);
+ ret = -UNW_EINVAL;
+ goto fail;
+ }
+ sr->rs_current.reg[regnum] = sr->rs_initial.reg[regnum];
+ Debug (15, "CFA_restore r%lu\n", (long) regnum);
+ break;
+
+ case DW_CFA_restore_extended:
+ if ((ret = dwarf_read_uleb128 (as, a, addr, ®num, arg)) < 0)
+ goto fail;
+ if (regnum >= DWARF_NUM_PRESERVED_REGS)
+ {
+ Debug (1, "Invalid register number %u in "
+ "DW_CFA_restore_extended\n", (unsigned int) regnum);
+ ret = -UNW_EINVAL;
+ goto fail;
+ }
+ sr->rs_current.reg[regnum] = sr->rs_initial.reg[regnum];
+ Debug (15, "CFA_restore_extended r%lu\n", (long) regnum);
+ break;
+
+ case DW_CFA_nop:
+ break;
+
+ case DW_CFA_set_loc:
+ fde_encoding = dci->fde_encoding;
+ if ((ret = dwarf_read_encoded_pointer (as, a, addr, fde_encoding,
+ &c->pi, &curr_ip,
+ arg)) < 0)
+ goto fail;
+ Debug (15, "CFA_set_loc to 0x%lx\n", (long) curr_ip);
+ break;
+
+ case DW_CFA_undefined:
+ if ((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
+ goto fail;
+ set_reg (sr, regnum, DWARF_WHERE_UNDEF, 0);
+ Debug (15, "CFA_undefined r%lu\n", (long) regnum);
+ break;
+
+ case DW_CFA_same_value:
+ if ((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
+ goto fail;
+ set_reg (sr, regnum, DWARF_WHERE_SAME, 0);
+ Debug (15, "CFA_same_value r%lu\n", (long) regnum);
+ break;
+
+ case DW_CFA_register:
+ if (((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
+ || ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0))
+ goto fail;
+ set_reg (sr, regnum, DWARF_WHERE_REG, val);
+ Debug (15, "CFA_register r%lu to r%lu\n", (long) regnum, (long) val);
+ break;
+
+ case DW_CFA_remember_state:
+ new_rs = alloc_reg_state ();
+ if (!new_rs)
+ {
+ Debug (1, "Out of memory in DW_CFA_remember_state\n");
+ ret = -UNW_ENOMEM;
+ goto fail;
+ }
+
+ memcpy (new_rs->reg, sr->rs_current.reg, sizeof (new_rs->reg));
+ new_rs->next = rs_stack;
+ rs_stack = new_rs;
+ Debug (15, "CFA_remember_state\n");
+ break;
+
+ case DW_CFA_restore_state:
+ if (!rs_stack)
+ {
+ Debug (1, "register-state stack underflow\n");
+ ret = -UNW_EINVAL;
+ goto fail;
+ }
+ memcpy (&sr->rs_current.reg, &rs_stack->reg, sizeof (rs_stack->reg));
+ old_rs = rs_stack;
+ rs_stack = rs_stack->next;
+ free_reg_state (old_rs);
+ Debug (15, "CFA_restore_state\n");
+ break;
+
+ case DW_CFA_def_cfa:
+ if (((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
+ || ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0))
+ goto fail;
+ set_reg (sr, DWARF_CFA_REG_COLUMN, DWARF_WHERE_REG, regnum);
+ set_reg (sr, DWARF_CFA_OFF_COLUMN, 0, val); /* NOT factored! */
+ Debug (15, "CFA_def_cfa r%lu+0x%lx\n", (long) regnum, (long) val);
+ break;
+
+ case DW_CFA_def_cfa_sf:
+ if (((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
+ || ((ret = dwarf_read_sleb128 (as, a, addr, &val, arg)) < 0))
+ goto fail;
+ set_reg (sr, DWARF_CFA_REG_COLUMN, DWARF_WHERE_REG, regnum);
+ set_reg (sr, DWARF_CFA_OFF_COLUMN, 0,
+ val * dci->data_align); /* factored! */
+ Debug (15, "CFA_def_cfa_sf r%lu+0x%lx\n",
+ (long) regnum, (long) (val * dci->data_align));
+ break;
+
+ case DW_CFA_def_cfa_register:
+ if ((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
+ goto fail;
+ set_reg (sr, DWARF_CFA_REG_COLUMN, DWARF_WHERE_REG, regnum);
+ Debug (15, "CFA_def_cfa_register r%lu\n", (long) regnum);
+ break;
+
+ case DW_CFA_def_cfa_offset:
+ if ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0)
+ goto fail;
+ set_reg (sr, DWARF_CFA_OFF_COLUMN, 0, val); /* NOT factored! */
+ Debug (15, "CFA_def_cfa_offset 0x%lx\n", (long) val);
+ break;
+
+ case DW_CFA_def_cfa_offset_sf:
+ if ((ret = dwarf_read_sleb128 (as, a, addr, &val, arg)) < 0)
+ goto fail;
+ set_reg (sr, DWARF_CFA_OFF_COLUMN, 0,
+ val * dci->data_align); /* factored! */
+ Debug (15, "CFA_def_cfa_offset_sf 0x%lx\n",
+ (long) (val * dci->data_align));
+ break;
+
+ case DW_CFA_def_cfa_expression:
+ /* Save the address of the DW_FORM_block for later evaluation. */
+ set_reg (sr, DWARF_CFA_REG_COLUMN, DWARF_WHERE_EXPR, *addr);
+
+ if ((ret = dwarf_read_uleb128 (as, a, addr, &len, arg)) < 0)
+ goto fail;
+
+ Debug (15, "CFA_def_cfa_expr @ 0x%lx [%lu bytes]\n",
+ (long) *addr, (long) len);
+ *addr += len;
+ break;
+
+ case DW_CFA_expression:
+ if ((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
+ goto fail;
+
+ /* Save the address of the DW_FORM_block for later evaluation. */
+ set_reg (sr, regnum, DWARF_WHERE_EXPR, *addr);
+
+ if ((ret = dwarf_read_uleb128 (as, a, addr, &len, arg)) < 0)
+ goto fail;
+
+ Debug (15, "CFA_expression r%lu @ 0x%lx [%lu bytes]\n",
+ (long) regnum, (long) addr, (long) len);
+ *addr += len;
+ break;
+
+ case DW_CFA_val_expression:
+ if ((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
+ goto fail;
+
+ /* Save the address of the DW_FORM_block for later evaluation. */
+ set_reg (sr, regnum, DWARF_WHERE_VAL_EXPR, *addr);
+
+ if ((ret = dwarf_read_uleb128 (as, a, addr, &len, arg)) < 0)
+ goto fail;
+
+ Debug (15, "CFA_val_expression r%lu @ 0x%lx [%lu bytes]\n",
+ (long) regnum, (long) addr, (long) len);
+ *addr += len;
+ break;
+
+ case DW_CFA_GNU_args_size:
+ if ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0)
+ goto fail;
+ sr->args_size = val;
+ Debug (15, "CFA_GNU_args_size %lu\n", (long) val);
+ break;
+
+ case DW_CFA_GNU_negative_offset_extended:
+ /* A comment in GCC says that this is obsoleted by
+ DW_CFA_offset_extended_sf, but that it's used by older
+ PowerPC code. */
+ if (((ret = read_regnum (as, a, addr, ®num, arg)) < 0)
+ || ((ret = dwarf_read_uleb128 (as, a, addr, &val, arg)) < 0))
+ goto fail;
+ set_reg (sr, regnum, DWARF_WHERE_CFAREL, -(val * dci->data_align));
+ Debug (15, "CFA_GNU_negative_offset_extended cfa+0x%lx\n",
+ (long) -(val * dci->data_align));
+ break;
+
+ case DW_CFA_GNU_window_save:
#ifdef UNW_TARGET_SPARC
- /* This is a special CFA to handle all 16 windowed registers
- on SPARC. */
- for (regnum = 16; regnum < 32; ++regnum)
- set_reg (sr, regnum, DWARF_WHERE_CFAREL,
- (regnum - 16) * sizeof (unw_word_t));
- Debug (15, "CFA_GNU_window_save\n");
- break;
+ /* This is a special CFA to handle all 16 windowed registers
+ on SPARC. */
+ for (regnum = 16; regnum < 32; ++regnum)
+ set_reg (sr, regnum, DWARF_WHERE_CFAREL,
+ (regnum - 16) * sizeof (unw_word_t));
+ Debug (15, "CFA_GNU_window_save\n");
+ break;
#else
- /* FALL THROUGH */
+ /* FALL THROUGH */
#endif
- case DW_CFA_lo_user:
- case DW_CFA_hi_user:
- Debug (1, "Unexpected CFA opcode 0x%x\n", op);
- ret = -UNW_EINVAL;
- goto fail;
- }
+ case DW_CFA_lo_user:
+ case DW_CFA_hi_user:
+ Debug (1, "Unexpected CFA opcode 0x%x\n", op);
+ ret = -UNW_EINVAL;
+ goto fail;
+ }
}
ret = 0;
/* check dynamic info first --- it overrides everything else */
ret = unwi_find_dynamic_proc_info (c->as, ip, &c->pi, need_unwind_info,
- c->as_arg);
+ c->as_arg);
if (ret == -UNW_ENOINFO)
{
dynamic = 0;
if ((ret = tdep_find_proc_info (c, ip, need_unwind_info)) < 0)
- return ret;
+ return ret;
}
if (c->pi.format != UNW_INFO_FORMAT_DYNAMIC
static inline void
put_unwind_info (struct dwarf_cursor *c, unw_proc_info_t *pi)
{
- if (!c->pi_valid)
- return;
-
if (c->pi_is_dynamic)
unwi_put_dynamic_unwind_info (c->as, pi, c->as_arg);
- else if (pi->unwind_info)
+ else if (pi->unwind_info && pi->format == UNW_INFO_FORMAT_TABLE)
{
mempool_free (&dwarf_cie_info_pool, pi->unwind_info);
pi->unwind_info = NULL;
addr = dci->cie_instr_start;
if ((ret = run_cfi_program (c, sr, ~(unw_word_t) 0, &addr,
- dci->cie_instr_end, dci)) < 0)
+ dci->cie_instr_end, dci)) < 0)
return ret;
memcpy (&sr->rs_initial, &sr->rs_current, sizeof (sr->rs_initial));
for (i = 0; i < DWARF_UNW_CACHE_SIZE; ++i)
{
if (i > 0)
- cache->buckets[i].lru_chain = (i - 1);
+ cache->buckets[i].lru_chain = (i - 1);
cache->buckets[i].coll_chain = -1;
cache->buckets[i].ip = 0;
cache->buckets[i].valid = 0;
static inline void
put_rs_cache (unw_addr_space_t as, struct dwarf_rs_cache *cache,
- intrmask_t *saved_maskp)
+ intrmask_t *saved_maskp)
{
assert (as->caching_policy != UNW_CACHE_NONE);
hash (unw_word_t ip)
{
/* based on (sqrt(5)/2-1)*2^64 */
-# define magic ((unw_word_t) 0x9e3779b97f4a7c16ULL)
+# define magic ((unw_word_t) 0x9e3779b97f4a7c16ULL)
return ip * magic >> ((sizeof(unw_word_t) * 8) - DWARF_LOG_UNW_HASH_SIZE);
}
tmp = cache->buckets + cache->hash[index];
prev = NULL;
while (1)
- {
- if (tmp == rs)
- {
- if (prev)
- prev->coll_chain = tmp->coll_chain;
- else
- cache->hash[index] = tmp->coll_chain;
- break;
- }
- else
- prev = tmp;
- if (tmp->coll_chain >= DWARF_UNW_CACHE_SIZE)
- /* old rs wasn't in the hash-table */
- break;
- tmp = cache->buckets + tmp->coll_chain;
- }
+ {
+ if (tmp == rs)
+ {
+ if (prev)
+ prev->coll_chain = tmp->coll_chain;
+ else
+ cache->hash[index] = tmp->coll_chain;
+ break;
+ }
+ else
+ prev = tmp;
+ if (tmp->coll_chain >= DWARF_UNW_CACHE_SIZE)
+ /* old rs wasn't in the hash-table */
+ break;
+ tmp = cache->buckets + tmp->coll_chain;
+ }
}
/* enter new rs in the hash table */
static int
create_state_record_for (struct dwarf_cursor *c, dwarf_state_record_t *sr,
- unw_word_t ip)
+ unw_word_t ip)
{
int i, ret;
static inline int
eval_location_expr (struct dwarf_cursor *c, unw_addr_space_t as,
- unw_accessors_t *a, unw_word_t addr,
- dwarf_loc_t *locp, void *arg)
+ unw_accessors_t *a, unw_word_t addr,
+ dwarf_loc_t *locp, void *arg)
{
int ret, is_register;
unw_word_t len, val;
/* CFA is equal to [reg] + offset: */
/* As a special-case, if the stack-pointer is the CFA and the
- stack-pointer wasn't saved, popping the CFA implicitly pops
- the stack-pointer as well. */
+ stack-pointer wasn't saved, popping the CFA implicitly pops
+ the stack-pointer as well. */
if ((rs->reg[DWARF_CFA_REG_COLUMN].val == UNW_TDEP_SP)
&& (UNW_TDEP_SP < ARRAY_SIZE(rs->reg))
- && (rs->reg[UNW_TDEP_SP].where == DWARF_WHERE_SAME))
- cfa = c->cfa;
+ && (rs->reg[UNW_TDEP_SP].where == DWARF_WHERE_SAME))
+ cfa = c->cfa;
else
- {
- regnum = dwarf_to_unw_regnum (rs->reg[DWARF_CFA_REG_COLUMN].val);
- if ((ret = unw_get_reg ((unw_cursor_t *) c, regnum, &cfa)) < 0)
- return ret;
- }
+ {
+ regnum = dwarf_to_unw_regnum (rs->reg[DWARF_CFA_REG_COLUMN].val);
+ if ((ret = unw_get_reg ((unw_cursor_t *) c, regnum, &cfa)) < 0)
+ return ret;
+ }
cfa += rs->reg[DWARF_CFA_OFF_COLUMN].val;
}
else
addr = rs->reg[DWARF_CFA_REG_COLUMN].val;
if ((ret = eval_location_expr (c, as, a, addr, &cfa_loc, arg)) < 0)
- return ret;
+ return ret;
/* the returned location better be a memory location... */
if (DWARF_IS_REG_LOC (cfa_loc))
- return -UNW_EBADFRAME;
+ return -UNW_EBADFRAME;
cfa = DWARF_GET_LOC (cfa_loc);
}
for (i = 0; i < DWARF_NUM_PRESERVED_REGS; ++i)
{
switch ((dwarf_where_t) rs->reg[i].where)
- {
- case DWARF_WHERE_UNDEF:
- c->loc[i] = DWARF_NULL_LOC;
- break;
-
- case DWARF_WHERE_SAME:
- break;
-
- case DWARF_WHERE_CFAREL:
- c->loc[i] = DWARF_MEM_LOC (c, cfa + rs->reg[i].val);
- break;
-
- case DWARF_WHERE_REG:
- c->loc[i] = DWARF_REG_LOC (c, dwarf_to_unw_regnum (rs->reg[i].val));
- break;
-
- case DWARF_WHERE_EXPR:
- addr = rs->reg[i].val;
- if ((ret = eval_location_expr (c, as, a, addr, c->loc + i, arg)) < 0)
- return ret;
- break;
- }
+ {
+ case DWARF_WHERE_UNDEF:
+ c->loc[i] = DWARF_NULL_LOC;
+ break;
+
+ case DWARF_WHERE_SAME:
+ break;
+
+ case DWARF_WHERE_CFAREL:
+ c->loc[i] = DWARF_MEM_LOC (c, cfa + rs->reg[i].val);
+ break;
+
+ case DWARF_WHERE_REG:
+ c->loc[i] = DWARF_REG_LOC (c, dwarf_to_unw_regnum (rs->reg[i].val));
+ break;
+
+ case DWARF_WHERE_EXPR:
+ addr = rs->reg[i].val;
+ if ((ret = eval_location_expr (c, as, a, addr, c->loc + i, arg)) < 0)
+ return ret;
+ break;
+
+ case DWARF_WHERE_VAL_EXPR:
+ addr = rs->reg[i].val;
+ if ((ret = eval_location_expr (c, as, a, addr, c->loc + i, arg)) < 0)
+ return ret;
+ c->loc[i] = DWARF_VAL_LOC (c, DWARF_GET_LOC (c->loc[i]));
+ break;
+ }
}
c->cfa = cfa;
if (c->ip == prev_ip && c->cfa == prev_cfa)
{
Dprintf ("%s: ip and cfa unchanged; stopping here (ip=0x%lx)\n",
- __FUNCTION__, (long) c->ip);
+ __FUNCTION__, (long) c->ip);
return -UNW_EBADFRAME;
}
int ret;
if ((ret = fetch_proc_info (c, c->ip, 1)) < 0)
- return ret;
+ {
+ put_unwind_info (c, &c->pi);
+ return ret;
+ }
if ((ret = create_state_record_for (c, &sr, c->ip)) < 0)
return ret;
else
{
if ((ret = fetch_proc_info (c, c->ip, 1)) < 0 ||
- (ret = create_state_record_for (c, &sr, c->ip)) < 0)
- {
- put_rs_cache (c->as, cache, &saved_mask);
- return ret;
- }
+ (ret = create_state_record_for (c, &sr, c->ip)) < 0)
+ {
+ put_rs_cache (c->as, cache, &saved_mask);
+ put_unwind_info (c, &c->pi);
+ return ret;
+ }
rs = rs_new (cache, c);
memcpy(rs, &sr.rs_current, offsetof(struct dwarf_reg_state, ip));
projects / platform / upstream / libunwind.git / blobdiff