From: Andreas Schwab Date: Tue, 9 May 2006 21:14:17 +0000 (+0000) Subject: * dwarf2-frame.c (struct dwarf2_fde): Add eh_frame_p. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4bf8967cb234b25f2732ecb075344fa17ce05f75;p=binutils-gdb.git * dwarf2-frame.c (struct dwarf2_fde): Add eh_frame_p. (execute_cfa_program): Add parameter eh_frame_p. Call dwarf2_frame_eh_frame_regnum when true. (dwarf2_frame_cache): Pass eh_frame_p from fde to execute_cfa_program. (decode_frame_entry_1): Call dwarf2_frame_eh_frame_regnum when processing .eh_frame. Copy eh_frame_p to the new fde. (struct dwarf2_frame_ops): Add eh_frame_regnum. (dwarf2_frame_set_eh_frame_regnum): Define. (dwarf2_frame_eh_frame_regnum): Define. * dwarf2-frame.h (dwarf2_frame_set_eh_frame_regnum): Declare. (dwarf2_frame_eh_frame_regnum): Declare. --- diff --git a/gdb/ChangeLog b/gdb/ChangeLog index bc9ff0a6ad7..d1981d85591 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,19 @@ +2006-05-09 Andreas Schwab + + * dwarf2-frame.c (struct dwarf2_fde): Add eh_frame_p. + (execute_cfa_program): Add parameter eh_frame_p. Call + dwarf2_frame_eh_frame_regnum when true. + (dwarf2_frame_cache): Pass eh_frame_p from fde to + execute_cfa_program. + (decode_frame_entry_1): Call dwarf2_frame_eh_frame_regnum when + processing .eh_frame. Copy eh_frame_p to the new fde. + (struct dwarf2_frame_ops): Add eh_frame_regnum. + (dwarf2_frame_set_eh_frame_regnum): Define. + (dwarf2_frame_eh_frame_regnum): Define. + + * dwarf2-frame.h (dwarf2_frame_set_eh_frame_regnum): Declare. + (dwarf2_frame_eh_frame_regnum): Declare. + 2006-05-06 David S. Miller * linux-nat.c (linux_nat_do_thread_registers): Check for diff --git a/gdb/dwarf2-frame.c b/gdb/dwarf2-frame.c index d479da2f5aa..3f7fbfe047c 100644 --- a/gdb/dwarf2-frame.c +++ b/gdb/dwarf2-frame.c @@ -89,6 +89,10 @@ struct dwarf2_fde gdb_byte *instructions; gdb_byte *end; + /* True if this FDE is read from a .eh_frame instead of a .debug_frame + section. */ + unsigned char eh_frame_p; + struct dwarf2_fde *next; }; @@ -267,10 +271,11 @@ execute_stack_op (gdb_byte *exp, ULONGEST len, static void execute_cfa_program (gdb_byte *insn_ptr, gdb_byte *insn_end, struct frame_info *next_frame, - struct dwarf2_frame_state *fs) + struct dwarf2_frame_state *fs, int eh_frame_p) { CORE_ADDR pc = frame_pc_unwind (next_frame); int bytes_read; + struct gdbarch *gdbarch = get_frame_arch (next_frame); while (insn_ptr < insn_end && fs->pc <= pc) { @@ -283,6 +288,8 @@ execute_cfa_program (gdb_byte *insn_ptr, gdb_byte *insn_end, else if ((insn & 0xc0) == DW_CFA_offset) { reg = insn & 0x3f; + if (eh_frame_p) + reg = dwarf2_frame_eh_frame_regnum (gdbarch, reg); insn_ptr = read_uleb128 (insn_ptr, insn_end, &utmp); offset = utmp * fs->data_align; dwarf2_frame_state_alloc_regs (&fs->regs, reg + 1); @@ -293,6 +300,8 @@ execute_cfa_program (gdb_byte *insn_ptr, gdb_byte *insn_end, { gdb_assert (fs->initial.reg); reg = insn & 0x3f; + if (eh_frame_p) + reg = dwarf2_frame_eh_frame_regnum (gdbarch, reg); dwarf2_frame_state_alloc_regs (&fs->regs, reg + 1); if (reg < fs->initial.num_regs) fs->regs.reg[reg] = fs->initial.reg[reg]; @@ -333,6 +342,8 @@ register %s (#%d) at 0x%s"), case DW_CFA_offset_extended: insn_ptr = read_uleb128 (insn_ptr, insn_end, ®); + if (eh_frame_p) + reg = dwarf2_frame_eh_frame_regnum (gdbarch, reg); insn_ptr = read_uleb128 (insn_ptr, insn_end, &utmp); offset = utmp * fs->data_align; dwarf2_frame_state_alloc_regs (&fs->regs, reg + 1); @@ -343,25 +354,35 @@ register %s (#%d) at 0x%s"), case DW_CFA_restore_extended: gdb_assert (fs->initial.reg); insn_ptr = read_uleb128 (insn_ptr, insn_end, ®); + if (eh_frame_p) + reg = dwarf2_frame_eh_frame_regnum (gdbarch, reg); dwarf2_frame_state_alloc_regs (&fs->regs, reg + 1); fs->regs.reg[reg] = fs->initial.reg[reg]; break; case DW_CFA_undefined: insn_ptr = read_uleb128 (insn_ptr, insn_end, ®); + if (eh_frame_p) + reg = dwarf2_frame_eh_frame_regnum (gdbarch, reg); dwarf2_frame_state_alloc_regs (&fs->regs, reg + 1); fs->regs.reg[reg].how = DWARF2_FRAME_REG_UNDEFINED; break; case DW_CFA_same_value: insn_ptr = read_uleb128 (insn_ptr, insn_end, ®); + if (eh_frame_p) + reg = dwarf2_frame_eh_frame_regnum (gdbarch, reg); dwarf2_frame_state_alloc_regs (&fs->regs, reg + 1); fs->regs.reg[reg].how = DWARF2_FRAME_REG_SAME_VALUE; break; case DW_CFA_register: insn_ptr = read_uleb128 (insn_ptr, insn_end, ®); + if (eh_frame_p) + reg = dwarf2_frame_eh_frame_regnum (gdbarch, reg); insn_ptr = read_uleb128 (insn_ptr, insn_end, &utmp); + if (eh_frame_p) + utmp = dwarf2_frame_eh_frame_regnum (gdbarch, utmp); dwarf2_frame_state_alloc_regs (&fs->regs, reg + 1); fs->regs.reg[reg].how = DWARF2_FRAME_REG_SAVED_REG; fs->regs.reg[reg].loc.reg = utmp; @@ -405,6 +426,9 @@ bad CFI data; mismatched DW_CFA_restore_state at 0x%s"), paddr (fs->pc)); case DW_CFA_def_cfa_register: insn_ptr = read_uleb128 (insn_ptr, insn_end, &fs->cfa_reg); + if (eh_frame_p) + fs->cfa_reg = dwarf2_frame_eh_frame_regnum (gdbarch, + fs->cfa_reg); fs->cfa_how = CFA_REG_OFFSET; break; @@ -426,6 +450,8 @@ bad CFI data; mismatched DW_CFA_restore_state at 0x%s"), paddr (fs->pc)); case DW_CFA_expression: insn_ptr = read_uleb128 (insn_ptr, insn_end, ®); + if (eh_frame_p) + reg = dwarf2_frame_eh_frame_regnum (gdbarch, reg); dwarf2_frame_state_alloc_regs (&fs->regs, reg + 1); insn_ptr = read_uleb128 (insn_ptr, insn_end, &utmp); fs->regs.reg[reg].loc.exp = insn_ptr; @@ -436,6 +462,8 @@ bad CFI data; mismatched DW_CFA_restore_state at 0x%s"), paddr (fs->pc)); case DW_CFA_offset_extended_sf: insn_ptr = read_uleb128 (insn_ptr, insn_end, ®); + if (eh_frame_p) + reg = dwarf2_frame_eh_frame_regnum (gdbarch, reg); insn_ptr = read_sleb128 (insn_ptr, insn_end, &offset); offset *= fs->data_align; dwarf2_frame_state_alloc_regs (&fs->regs, reg + 1); @@ -445,6 +473,9 @@ bad CFI data; mismatched DW_CFA_restore_state at 0x%s"), paddr (fs->pc)); case DW_CFA_def_cfa_sf: insn_ptr = read_uleb128 (insn_ptr, insn_end, &fs->cfa_reg); + if (eh_frame_p) + fs->cfa_reg = dwarf2_frame_eh_frame_regnum (gdbarch, + fs->cfa_reg); insn_ptr = read_sleb128 (insn_ptr, insn_end, &offset); fs->cfa_offset = offset * fs->data_align; fs->cfa_how = CFA_REG_OFFSET; @@ -512,6 +543,9 @@ struct dwarf2_frame_ops /* Check whether the frame preceding NEXT_FRAME will be a signal trampoline. */ int (*signal_frame_p) (struct gdbarch *, struct frame_info *); + + /* Convert .eh_frame register number to DWARF register number. */ + int (*eh_frame_regnum) (struct gdbarch *, int); }; /* Default architecture-specific register state initialization @@ -618,6 +652,31 @@ dwarf2_frame_signal_frame_p (struct gdbarch *gdbarch, return 0; return ops->signal_frame_p (gdbarch, next_frame); } + +/* Set the architecture-specific mapping of .eh_frame register numbers to + DWARF register numbers. */ + +void +dwarf2_frame_set_eh_frame_regnum (struct gdbarch *gdbarch, + int (*eh_frame_regnum) (struct gdbarch *, + int)) +{ + struct dwarf2_frame_ops *ops = gdbarch_data (gdbarch, dwarf2_frame_data); + + ops->eh_frame_regnum = eh_frame_regnum; +} + +/* Translate a .eh_frame register to DWARF register. */ + +int +dwarf2_frame_eh_frame_regnum (struct gdbarch *gdbarch, int regnum) +{ + struct dwarf2_frame_ops *ops = gdbarch_data (gdbarch, dwarf2_frame_data); + + if (ops->eh_frame_regnum == NULL) + return regnum; + return ops->eh_frame_regnum (gdbarch, regnum); +} struct dwarf2_frame_cache @@ -686,14 +745,15 @@ dwarf2_frame_cache (struct frame_info *next_frame, void **this_cache) /* First decode all the insns in the CIE. */ execute_cfa_program (fde->cie->initial_instructions, - fde->cie->end, next_frame, fs); + fde->cie->end, next_frame, fs, fde->eh_frame_p); /* Save the initialized register set. */ fs->initial = fs->regs; fs->initial.reg = dwarf2_frame_state_copy_regs (&fs->regs); /* Then decode the insns in the FDE up to our target PC. */ - execute_cfa_program (fde->instructions, fde->end, next_frame, fs); + execute_cfa_program (fde->instructions, fde->end, next_frame, fs, + fde->eh_frame_p); /* Caclulate the CFA. */ switch (fs->cfa_how) @@ -1490,6 +1550,11 @@ decode_frame_entry_1 (struct comp_unit *unit, gdb_byte *start, int eh_frame_p) else cie->return_address_register = read_unsigned_leb128 (unit->abfd, buf, &bytes_read); + if (eh_frame_p) + cie->return_address_register + = dwarf2_frame_eh_frame_regnum (current_gdbarch, + cie->return_address_register); + buf += bytes_read; cie->saw_z_augmentation = (*augmentation == 'z'); @@ -1607,6 +1672,8 @@ decode_frame_entry_1 (struct comp_unit *unit, gdb_byte *start, int eh_frame_p) fde->instructions = buf; fde->end = end; + fde->eh_frame_p = eh_frame_p; + add_fde (unit, fde); } diff --git a/gdb/dwarf2-frame.h b/gdb/dwarf2-frame.h index a4ad586ad38..da9fe4788f1 100644 --- a/gdb/dwarf2-frame.h +++ b/gdb/dwarf2-frame.h @@ -90,6 +90,19 @@ extern void int (*signal_frame_p) (struct gdbarch *, struct frame_info *)); +/* Set the architecture-specific mapping of .eh_frame register numbers to + DWARF register numbers. */ + +extern void + dwarf2_frame_set_eh_frame_regnum (struct gdbarch *gdbarch, + int (*eh_frame_regnum) (struct gdbarch *, + int)); + +/* Translate a .eh_frame register to DWARF register. */ + +extern int + dwarf2_frame_eh_frame_regnum (struct gdbarch *gdbarch, int regnum); + /* Return the frame unwind methods for the function that contains PC, or NULL if it can't be handled by DWARF CFI frame unwinder. */