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CARP: Mechanism to replace EXTRA_FRAME_INFO.

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Add two pointers (saved_regs, extra_info) to struct frame_info.
Introduce new macro FRAME_INIT_SAVED_REGS which replaces
FRAME_FIND_SAVED_REGS.

Document.

Use in mn10300 and rs6000 targets. Fix side effects on ALPHA, MIPS,
Z8K and SPARC targets.
This commit is contained in:
Andrew Cagney
1998-12-12 02:50:39 +00:00
parent 7381ab4534
commit 86a51f415d
16 changed files with 269 additions and 237 deletions
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41
gdb/alpha-tdep.c
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@@ -31,10 +31,6 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* FIXME: Some of this code should perhaps be merged with mips-tdep.c. */
/* FIXME: Put this declaration in frame.h. */
extern struct obstack frame_cache_obstack;
/* Prototypes for local functions. */
static alpha_extra_func_info_t push_sigtramp_desc PARAMS ((CORE_ADDR low_addr));
@@ -254,9 +250,7 @@ alpha_find_saved_regs (frame)
alpha_extra_func_info_t proc_desc;
int returnreg;
frame->saved_regs = (struct frame_saved_regs *)
obstack_alloc (&frame_cache_obstack, sizeof(struct frame_saved_regs));
memset (frame->saved_regs, 0, sizeof (struct frame_saved_regs));
frame_saved_regs_zalloc (frame);
/* If it is the frame for __sigtramp, the saved registers are located
in a sigcontext structure somewhere on the stack. __sigtramp
@@ -276,14 +270,14 @@ alpha_find_saved_regs (frame)
for (ireg = 0; ireg < 32; ireg++)
{
reg_position = sigcontext_addr + SIGFRAME_REGSAVE_OFF + ireg * 8;
frame->saved_regs->regs[ireg] = reg_position;
frame->saved_regs[ireg] = reg_position;
}
for (ireg = 0; ireg < 32; ireg++)
{
reg_position = sigcontext_addr + SIGFRAME_FPREGSAVE_OFF + ireg * 8;
frame->saved_regs->regs[FP0_REGNUM + ireg] = reg_position;
frame->saved_regs[FP0_REGNUM + ireg] = reg_position;
}
frame->saved_regs->regs[PC_REGNUM] = sigcontext_addr + SIGFRAME_PC_OFF;
frame->saved_regs[PC_REGNUM] = sigcontext_addr + SIGFRAME_PC_OFF;
return;
}
@@ -306,7 +300,7 @@ alpha_find_saved_regs (frame)
register number. */
if (mask & (1 << returnreg))
{
frame->saved_regs->regs[returnreg] = reg_position;
frame->saved_regs[returnreg] = reg_position;
reg_position += 8;
mask &= ~(1 << returnreg); /* Clear bit for RA so we
don't save again later. */
@@ -315,7 +309,7 @@ alpha_find_saved_regs (frame)
for (ireg = 0; ireg <= 31 ; ++ireg)
if (mask & (1 << ireg))
{
frame->saved_regs->regs[ireg] = reg_position;
frame->saved_regs[ireg] = reg_position;
reg_position += 8;
}
@@ -328,11 +322,11 @@ alpha_find_saved_regs (frame)
for (ireg = 0; ireg <= 31 ; ++ireg)
if (mask & (1 << ireg))
{
frame->saved_regs->regs[FP0_REGNUM+ireg] = reg_position;
frame->saved_regs[FP0_REGNUM+ireg] = reg_position;
reg_position += 8;
}
frame->saved_regs->regs[PC_REGNUM] = frame->saved_regs->regs[returnreg];
frame->saved_regs[PC_REGNUM] = frame->saved_regs[returnreg];
}
static CORE_ADDR
@@ -350,8 +344,8 @@ read_next_frame_reg(fi, regno)
{
if (fi->saved_regs == NULL)
alpha_find_saved_regs (fi);
if (fi->saved_regs->regs[regno])
return read_memory_integer(fi->saved_regs->regs[regno], 8);
if (fi->saved_regs[regno])
return read_memory_integer(fi->saved_regs[regno], 8);
}
}
return read_register(regno);
@@ -855,12 +849,11 @@ init_extra_frame_info (frame)
(CORE_ADDR *)NULL,(CORE_ADDR *)NULL);
if (!IN_SIGTRAMP (frame->pc, name))
{
frame->saved_regs = (struct frame_saved_regs*)
obstack_alloc (&frame_cache_obstack,
sizeof (struct frame_saved_regs));
*frame->saved_regs = temp_saved_regs;
frame->saved_regs->regs[PC_REGNUM]
= frame->saved_regs->regs[RA_REGNUM];
frame->saved_regs = (CORE_ADDR*)
frame_obstack_alloc (SIZEOF_FRAME_SAVED_REGS);
memcpy (frame->saved_regs, temp_saved_regs.regs, SIZEOF_FRAME_SAVED_REGS);
frame->saved_regs[PC_REGNUM]
= frame->saved_regs[RA_REGNUM];
}
}
}
@@ -1116,12 +1109,12 @@ alpha_pop_frame()
for (regnum = 32; --regnum >= 0; )
if (PROC_REG_MASK(proc_desc) & (1 << regnum))
write_register (regnum,
read_memory_integer (frame->saved_regs->regs[regnum],
read_memory_integer (frame->saved_regs[regnum],
8));
for (regnum = 32; --regnum >= 0; )
if (PROC_FREG_MASK(proc_desc) & (1 << regnum))
write_register (regnum + FP0_REGNUM,
read_memory_integer (frame->saved_regs->regs[regnum + FP0_REGNUM], 8));
read_memory_integer (frame->saved_regs[regnum + FP0_REGNUM], 8));
}
write_register (SP_REGNUM, new_sp);
flush_cached_frames ();