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* mips-nat.c (fetch_core_registers, register_addr): Copy from

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coredep.c, but zero out FP_REGNUM & ZERO_REGNUM so that stack
	backtraces from core files work.
	* config/decstation.mh, config/irix3.mh:  Remove coredep.o.
	Functions are now defined in mips-nat.c.
This commit is contained in:
Stu Grossman
1992-10-20 05:47:47 +00:00
parent 3ec5a74b0d
commit 56fc16c70b
5 changed files with 97 additions and 2 deletions
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82
gdb/mips-nat.c
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@@ -25,6 +25,17 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <sys/ptrace.h>
#include <setjmp.h> /* For JB_XXX. */
#include <sys/types.h>
#include <sys/param.h>
#include "gdbcore.h"
/* These are needed on various systems to expand REGISTER_U_ADDR. */
#include <sys/dir.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/user.h>
#include <sys/ptrace.h>
/* Size of elements in jmpbuf */
#define JB_ELEMENT_SIZE 4
@@ -144,3 +155,74 @@ get_longjmp_target(pc)
return 1;
}
/* Extract the register values out of the core file and store
them where `read_register' will find them.
CORE_REG_SECT points to the register values themselves, read into memory.
CORE_REG_SIZE is the size of that area.
WHICH says which set of registers we are handling (0 = int, 2 = float
on machines where they are discontiguous).
REG_ADDR is the offset from u.u_ar0 to the register values relative to
core_reg_sect. This is used with old-fashioned core files to
locate the registers in a large upage-plus-stack ".reg" section.
Original upage address X is at location core_reg_sect+x+reg_addr.
*/
void
fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
char *core_reg_sect;
unsigned core_reg_size;
int which;
unsigned reg_addr;
{
register int regno;
register unsigned int addr;
int bad_reg = -1;
register reg_ptr = -reg_addr; /* Original u.u_ar0 is -reg_addr. */
/* If u.u_ar0 was an absolute address in the core file, relativize it now,
so we can use it as an offset into core_reg_sect. When we're done,
"register 0" will be at core_reg_sect+reg_ptr, and we can use
register_addr to offset to the other registers. If this is a modern
core file without a upage, reg_ptr will be zero and this is all a big
NOP. */
if (reg_ptr > core_reg_size)
reg_ptr -= KERNEL_U_ADDR;
for (regno = 0; regno < NUM_REGS; regno++)
{
addr = register_addr (regno, reg_ptr);
if (addr >= core_reg_size) {
if (bad_reg < 0)
bad_reg = regno;
} else {
supply_register (regno, core_reg_sect + addr);
}
}
if (bad_reg >= 0)
{
error ("Register %s not found in core file.", reg_names[bad_reg]);
}
supply_register (ZERO_REGNUM, zerobuf);
/* Frame ptr reg must appear to be 0; it is faked by stack handling code. */
supply_register (FP_REGNUM, zerobuf);
}
/* Return the address in the core dump or inferior of register REGNO.
BLOCKEND is the address of the end of the user structure. */
unsigned int
register_addr (regno, blockend)
int regno;
int blockend;
{
int addr;
if (regno < 0 || regno >= NUM_REGS)
error ("Invalid register number %d.", regno);
REGISTER_U_ADDR (addr, blockend, regno);
return addr;
}