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* rs6000-tdep.c (ppc_dwarf2_frame_init_reg): New function.

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(rs6000_gdbarch_init): Install ppc_dwarf2_frame_init_reg as
      default dwarf2_frame_set_init_reg function.
This commit is contained in:
Luis Machado 2007-10-21 20:04:47 +00:00
parent e7b1eae683
commit 9274a07c1a
2 changed files with 71 additions and 0 deletions
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6
gdb/ChangeLog
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@ -1,3 +1,9 @@
2007-10-21 Luis Machado <luisgpm@br.ibm.com>
* rs6000-tdep.c (ppc_dwarf2_frame_init_reg): New function.
* (rs6000_gdbarch_init): Install ppc_dwarf2_frame_init_reg as
default dwarf2_frame_set_init_reg function.
2007-10-21 Pedro Alves <pedro_alves@portugalmail.pt>
* NEWS: Mention native MinGW configuration.

65
gdb/rs6000-tdep.c
View File

@ -2947,6 +2947,68 @@ rs6000_frame_base_sniffer (struct frame_info *next_frame)
return &rs6000_frame_base;
}
/* DWARF-2 frame support. Used to handle the detection of
clobbered registers during function calls. */
static void
ppc_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum,
struct dwarf2_frame_state_reg *reg,
struct frame_info *next_frame)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
/* PPC32 and PPC64 ABI's are the same regarding volatile and
non-volatile registers. We will use the same code for both. */
/* Call-saved GP registers. */
if ((regnum >= tdep->ppc_gp0_regnum + 14
&& regnum <= tdep->ppc_gp0_regnum + 31)
|| (regnum == tdep->ppc_gp0_regnum + 1))
reg->how = DWARF2_FRAME_REG_SAME_VALUE;
/* Call-clobbered GP registers. */
if ((regnum >= tdep->ppc_gp0_regnum + 3
&& regnum <= tdep->ppc_gp0_regnum + 12)
|| (regnum == tdep->ppc_gp0_regnum))
reg->how = DWARF2_FRAME_REG_UNDEFINED;
/* Deal with FP registers, if supported. */
if (tdep->ppc_fp0_regnum >= 0)
{
/* Call-saved FP registers. */
if ((regnum >= tdep->ppc_fp0_regnum + 14
&& regnum <= tdep->ppc_fp0_regnum + 31))
reg->how = DWARF2_FRAME_REG_SAME_VALUE;
/* Call-clobbered FP registers. */
if ((regnum >= tdep->ppc_fp0_regnum
&& regnum <= tdep->ppc_fp0_regnum + 13))
reg->how = DWARF2_FRAME_REG_UNDEFINED;
}
/* Deal with ALTIVEC registers, if supported. */
if (tdep->ppc_vr0_regnum > 0 && tdep->ppc_vrsave_regnum > 0)
{
/* Call-saved Altivec registers. */
if ((regnum >= tdep->ppc_vr0_regnum + 20
&& regnum <= tdep->ppc_vr0_regnum + 31)
|| regnum == tdep->ppc_vrsave_regnum)
reg->how = DWARF2_FRAME_REG_SAME_VALUE;
/* Call-clobbered Altivec registers. */
if ((regnum >= tdep->ppc_vr0_regnum
&& regnum <= tdep->ppc_vr0_regnum + 19))
reg->how = DWARF2_FRAME_REG_UNDEFINED;
}
/* Handle PC register and Stack Pointer correctly. */
if (regnum == gdbarch_pc_regnum (current_gdbarch))
reg->how = DWARF2_FRAME_REG_RA;
else if (regnum == gdbarch_sp_regnum (current_gdbarch))
reg->how = DWARF2_FRAME_REG_CFA;
}
/* Initialize the current architecture based on INFO. If possible, re-use an
architecture from ARCHES, which is a list of architectures already created
during this debugging session.
@ -3410,6 +3472,9 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
dwarf2_frame_set_adjust_regnum (gdbarch, rs6000_adjust_frame_regnum);
/* Frame handling. */
dwarf2_frame_set_init_reg (gdbarch, ppc_dwarf2_frame_init_reg);
/* Hook in ABI-specific overrides, if they have been registered. */
gdbarch_init_osabi (info, gdbarch);