1 /* Low level Alpha interface, for GDB when running native.
2 Copyright 1993 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
24 #include <sys/ptrace.h>
25 #include <machine/reg.h>
27 /* Size of elements in jmpbuf */
29 #define JB_ELEMENT_SIZE 8
31 /* The definition for JB_PC in machine/reg.h is wrong.
32 And we can't get at the correct definition in setjmp.h as it is
33 not always available (eg. if _POSIX_SOURCE is defined which is the
34 default). As the defintion is unlikely to change (see comment
35 in <setjmp.h>, define the correct value here. */
40 /* Figure out where the longjmp will land.
41 We expect the first arg to be a pointer to the jmp_buf structure from which
42 we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
43 This routine returns true on success. */
46 get_longjmp_target (pc
)
50 char raw_buffer
[MAX_REGISTER_RAW_SIZE
];
52 jb_addr
= read_register(A0_REGNUM
);
54 if (target_read_memory(jb_addr
+ JB_PC
* JB_ELEMENT_SIZE
, raw_buffer
,
58 *pc
= extract_address (raw_buffer
, sizeof(CORE_ADDR
));
62 /* Extract the register values out of the core file and store
63 them where `read_register' will find them.
65 CORE_REG_SECT points to the register values themselves, read into memory.
66 CORE_REG_SIZE is the size of that area.
67 WHICH says which set of registers we are handling (0 = int, 2 = float
68 on machines where they are discontiguous).
69 REG_ADDR is the offset from u.u_ar0 to the register values relative to
70 core_reg_sect. This is used with old-fashioned core files to
71 locate the registers in a large upage-plus-stack ".reg" section.
72 Original upage address X is at location core_reg_sect+x+reg_addr.
76 fetch_core_registers (core_reg_sect
, core_reg_size
, which
, reg_addr
)
78 unsigned core_reg_size
;
86 /* Table to map a gdb regnum to an index in the core register section.
87 The floating point register values are garbage in OSF/1.2 core files. */
88 static int core_reg_mapping
[NUM_REGS
] =
90 #define EFL (EF_SIZE / 8)
91 EF_V0
, EF_T0
, EF_T1
, EF_T2
, EF_T3
, EF_T4
, EF_T5
, EF_T6
,
92 EF_T7
, EF_S0
, EF_S1
, EF_S2
, EF_S3
, EF_S4
, EF_S5
, EF_S6
,
93 EF_A0
, EF_A1
, EF_A2
, EF_A3
, EF_A4
, EF_A5
, EF_T8
, EF_T9
,
94 EF_T10
, EF_T11
, EF_RA
, EF_T12
, EF_AT
, EF_GP
, EF_SP
, -1,
95 EFL
+0, EFL
+1, EFL
+2, EFL
+3, EFL
+4, EFL
+5, EFL
+6, EFL
+7,
96 EFL
+8, EFL
+9, EFL
+10, EFL
+11, EFL
+12, EFL
+13, EFL
+14, EFL
+15,
97 EFL
+16, EFL
+17, EFL
+18, EFL
+19, EFL
+20, EFL
+21, EFL
+22, EFL
+23,
98 EFL
+24, EFL
+25, EFL
+26, EFL
+27, EFL
+28, EFL
+29, EFL
+30, EFL
+31,
101 static char zerobuf
[MAX_REGISTER_RAW_SIZE
] = {0};
103 for (regno
= 0; regno
< NUM_REGS
; regno
++)
105 if (CANNOT_FETCH_REGISTER (regno
))
107 supply_register (regno
, zerobuf
);
110 addr
= 8 * core_reg_mapping
[regno
];
111 if (addr
< 0 || addr
>= core_reg_size
)
118 supply_register (regno
, core_reg_sect
+ addr
);
123 error ("Register %s not found in core file.", reg_names
[bad_reg
]);
127 /* Map gdb internal register number to a ptrace ``address''.
128 These ``addresses'' are defined in <sys/ptrace.h> */
130 #define REGISTER_PTRACE_ADDR(regno) \
131 (regno < FP0_REGNUM ? GPR_BASE + (regno) \
132 : regno == PC_REGNUM ? PC \
133 : regno >= FP0_REGNUM ? FPR_BASE + ((regno) - FP0_REGNUM) \
136 /* Return the ptrace ``address'' of register REGNO. */
139 register_addr (regno
, blockend
)
143 return REGISTER_PTRACE_ADDR (regno
);
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