qemu/target/sparc/gdbstub.c
Alex Bennée a010bdbe71 gdbstub: extend GByteArray to read register helpers
Instead of passing a pointer to memory now just extend the GByteArray
to all the read register helpers. They can then safely append their
data through the normal way. We don't bother with this abstraction for
write registers as we have already ensured the buffer being copied
from is the correct size.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Damien Hedde <damien.hedde@greensocs.com>

Message-Id: <20200316172155.971-15-alex.bennee@linaro.org>
2020-03-17 17:38:38 +00:00

209 lines
5.5 KiB
C

/*
* SPARC gdb server stub
*
* Copyright (c) 2003-2005 Fabrice Bellard
* Copyright (c) 2013 SUSE LINUX Products GmbH
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/gdbstub.h"
#ifdef TARGET_ABI32
#define gdb_get_rega(buf, val) gdb_get_reg32(buf, val)
#else
#define gdb_get_rega(buf, val) gdb_get_regl(buf, val)
#endif
int sparc_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
{
SPARCCPU *cpu = SPARC_CPU(cs);
CPUSPARCState *env = &cpu->env;
if (n < 8) {
/* g0..g7 */
return gdb_get_rega(mem_buf, env->gregs[n]);
}
if (n < 32) {
/* register window */
return gdb_get_rega(mem_buf, env->regwptr[n - 8]);
}
#if defined(TARGET_ABI32) || !defined(TARGET_SPARC64)
if (n < 64) {
/* fprs */
if (n & 1) {
return gdb_get_reg32(mem_buf, env->fpr[(n - 32) / 2].l.lower);
} else {
return gdb_get_reg32(mem_buf, env->fpr[(n - 32) / 2].l.upper);
}
}
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
switch (n) {
case 64:
return gdb_get_rega(mem_buf, env->y);
case 65:
return gdb_get_rega(mem_buf, cpu_get_psr(env));
case 66:
return gdb_get_rega(mem_buf, env->wim);
case 67:
return gdb_get_rega(mem_buf, env->tbr);
case 68:
return gdb_get_rega(mem_buf, env->pc);
case 69:
return gdb_get_rega(mem_buf, env->npc);
case 70:
return gdb_get_rega(mem_buf, env->fsr);
case 71:
return gdb_get_rega(mem_buf, 0); /* csr */
default:
return gdb_get_rega(mem_buf, 0);
}
#else
if (n < 64) {
/* f0-f31 */
if (n & 1) {
return gdb_get_reg32(mem_buf, env->fpr[(n - 32) / 2].l.lower);
} else {
return gdb_get_reg32(mem_buf, env->fpr[(n - 32) / 2].l.upper);
}
}
if (n < 80) {
/* f32-f62 (double width, even numbers only) */
return gdb_get_reg64(mem_buf, env->fpr[(n - 32) / 2].ll);
}
switch (n) {
case 80:
return gdb_get_regl(mem_buf, env->pc);
case 81:
return gdb_get_regl(mem_buf, env->npc);
case 82:
return gdb_get_regl(mem_buf, (cpu_get_ccr(env) << 32) |
((env->asi & 0xff) << 24) |
((env->pstate & 0xfff) << 8) |
cpu_get_cwp64(env));
case 83:
return gdb_get_regl(mem_buf, env->fsr);
case 84:
return gdb_get_regl(mem_buf, env->fprs);
case 85:
return gdb_get_regl(mem_buf, env->y);
}
#endif
return 0;
}
int sparc_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
{
SPARCCPU *cpu = SPARC_CPU(cs);
CPUSPARCState *env = &cpu->env;
#if defined(TARGET_ABI32)
abi_ulong tmp;
tmp = ldl_p(mem_buf);
#else
target_ulong tmp;
tmp = ldtul_p(mem_buf);
#endif
if (n < 8) {
/* g0..g7 */
env->gregs[n] = tmp;
} else if (n < 32) {
/* register window */
env->regwptr[n - 8] = tmp;
}
#if defined(TARGET_ABI32) || !defined(TARGET_SPARC64)
else if (n < 64) {
/* fprs */
/* f0-f31 */
if (n & 1) {
env->fpr[(n - 32) / 2].l.lower = tmp;
} else {
env->fpr[(n - 32) / 2].l.upper = tmp;
}
} else {
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
switch (n) {
case 64:
env->y = tmp;
break;
case 65:
cpu_put_psr(env, tmp);
break;
case 66:
env->wim = tmp;
break;
case 67:
env->tbr = tmp;
break;
case 68:
env->pc = tmp;
break;
case 69:
env->npc = tmp;
break;
case 70:
env->fsr = tmp;
break;
default:
return 0;
}
}
return 4;
#else
else if (n < 64) {
/* f0-f31 */
tmp = ldl_p(mem_buf);
if (n & 1) {
env->fpr[(n - 32) / 2].l.lower = tmp;
} else {
env->fpr[(n - 32) / 2].l.upper = tmp;
}
return 4;
} else if (n < 80) {
/* f32-f62 (double width, even numbers only) */
env->fpr[(n - 32) / 2].ll = tmp;
} else {
switch (n) {
case 80:
env->pc = tmp;
break;
case 81:
env->npc = tmp;
break;
case 82:
cpu_put_ccr(env, tmp >> 32);
env->asi = (tmp >> 24) & 0xff;
env->pstate = (tmp >> 8) & 0xfff;
cpu_put_cwp64(env, tmp & 0xff);
break;
case 83:
env->fsr = tmp;
break;
case 84:
env->fprs = tmp;
break;
case 85:
env->y = tmp;
break;
default:
return 0;
}
}
return 8;
#endif
}