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mips32: add gdb target description support 

This commit is inspired by

    commit 1255b18fc6
    Author: Spencer Oliver <spen@spen-soft.co.uk>
    Date:   Fri Sep 13 09:44:36 2013 +0100

        armv7m: add gdb target description support

Change-Id: I75c3971fd0599d34ed49fb73975378b57f2a4af0
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Salvador Arroyo <sarroyofdez@yahoo.es>
CC: Spencer Oliver <spen@spen-soft.co.uk>
CC: Oleksij Rempel <linux@rempel-privat.de>
CC: Paul Fertser <fercerpav@gmail.com>
CC: Gregory Fong <gregory.0xf0@gmail.com>
Reviewed-on: http://openocd.zylin.com/1972
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
Tested-by: jenkins
This commit is contained in:
Antony Pavlov 2014-02-26 00:16:58 +04:00 committed by Andreas Fritiofson
parent 3f447bb8dd
commit fd43be0726
2 changed files with 166 additions and 76 deletions
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241
src/target/mips32.c
View File

@ -39,67 +39,134 @@ static const char *mips_isa_strings[] = {
"MIPS32", "MIPS16e"
};
#define MIPS32_GDB_DUMMY_FP_REG 1
/*
* GDB registers
* based on gdb-7.6.2/gdb/features/mips-{fpu,cp0,cpu}.xml
*/
static const struct {
unsigned id;
const char *name;
} mips32_regs[MIPS32NUMCOREREGS] = {
{ 0, "zero", },
{ 1, "at", },
{ 2, "v0", },
{ 3, "v1", },
{ 4, "a0", },
{ 5, "a1", },
{ 6, "a2", },
{ 7, "a3", },
{ 8, "t0", },
{ 9, "t1", },
{ 10, "t2", },
{ 11, "t3", },
{ 12, "t4", },
{ 13, "t5", },
{ 14, "t6", },
{ 15, "t7", },
{ 16, "s0", },
{ 17, "s1", },
{ 18, "s2", },
{ 19, "s3", },
{ 20, "s4", },
{ 21, "s5", },
{ 22, "s6", },
{ 23, "s7", },
{ 24, "t8", },
{ 25, "t9", },
{ 26, "k0", },
{ 27, "k1", },
{ 28, "gp", },
{ 29, "sp", },
{ 30, "fp", },
{ 31, "ra", },
enum reg_type type;
const char *group;
const char *feature;
int flag;
} mips32_regs[] = {
{ 0, "r0", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 1, "r1", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 2, "r2", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 3, "r3", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 4, "r4", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 5, "r5", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 6, "r6", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 7, "r7", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 8, "r8", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 9, "r9", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 10, "r10", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 11, "r11", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 12, "r12", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 13, "r13", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 14, "r14", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 15, "r15", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 16, "r16", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 17, "r17", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 18, "r18", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 19, "r19", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 20, "r20", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 21, "r21", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 22, "r22", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 23, "r23", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 24, "r24", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 25, "r25", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 26, "r26", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 27, "r27", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 28, "r28", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 29, "r29", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 30, "r30", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 31, "r31", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 32, "status", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cp0", 0 },
{ 33, "lo", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 34, "hi", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 35, "badvaddr", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cp0", 0 },
{ 36, "cause", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cp0", 0 },
{ 37, "pc", REG_TYPE_INT, NULL, "org.gnu.gdb.mips.cpu", 0 },
{ 32, "status", },
{ 33, "lo", },
{ 34, "hi", },
{ 35, "badvaddr", },
{ 36, "cause", },
{ 37, "pc" },
{ 38, "f0", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 39, "f1", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 40, "f2", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 41, "f3", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 42, "f4", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 43, "f5", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 44, "f6", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 45, "f7", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 46, "f8", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 47, "f9", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 48, "f10", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 49, "f11", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 50, "f12", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 51, "f13", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 52, "f14", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 53, "f15", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 54, "f16", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 55, "f17", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 56, "f18", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 57, "f19", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 58, "f20", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 59, "f21", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 60, "f22", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 61, "f23", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 62, "f24", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 63, "f25", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 64, "f26", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 65, "f27", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 66, "f28", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 67, "f29", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 68, "f30", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 69, "f31", REG_TYPE_IEEE_SINGLE, NULL,
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 70, "fcsr", REG_TYPE_INT, "float",
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
{ 71, "fir", REG_TYPE_INT, "float",
"org.gnu.gdb.mips.fpu", MIPS32_GDB_DUMMY_FP_REG },
};
/* number of mips dummy fp regs fp0 - fp31 + fsr and fir
* we also add 18 unknown registers to handle gdb requests */
#define MIPS32NUMFPREGS (34 + 18)
#define MIPS32_NUM_REGS ARRAY_SIZE(mips32_regs)
static uint8_t mips32_gdb_dummy_fp_value[] = {0, 0, 0, 0};
static struct reg mips32_gdb_dummy_fp_reg = {
.name = "GDB dummy floating-point register",
.value = mips32_gdb_dummy_fp_value,
.dirty = 0,
.valid = 1,
.size = 32,
.arch_info = NULL,
};
static int mips32_get_core_reg(struct reg *reg)
{
int retval;
@ -138,7 +205,7 @@ static int mips32_read_core_reg(struct target *target, unsigned int num)
/* get pointers to arch-specific information */
struct mips32_common *mips32 = target_to_mips32(target);
if (num >= MIPS32NUMCOREREGS)
if (num >= MIPS32_NUM_REGS)
return ERROR_COMMAND_SYNTAX_ERROR;
reg_value = mips32->core_regs[num];
@ -156,7 +223,7 @@ static int mips32_write_core_reg(struct target *target, unsigned int num)
/* get pointers to arch-specific information */
struct mips32_common *mips32 = target_to_mips32(target);
if (num >= MIPS32NUMCOREREGS)
if (num >= MIPS32_NUM_REGS)
return ERROR_COMMAND_SYNTAX_ERROR;
reg_value = buf_get_u32(mips32->core_cache->reg_list[num].value, 0, 32);
@ -176,16 +243,12 @@ int mips32_get_gdb_reg_list(struct target *target, struct reg **reg_list[],
unsigned int i;
/* include floating point registers */
*reg_list_size = MIPS32NUMCOREREGS + MIPS32NUMFPREGS;
*reg_list_size = MIPS32_NUM_REGS;
*reg_list = malloc(sizeof(struct reg *) * (*reg_list_size));
for (i = 0; i < MIPS32NUMCOREREGS; i++)
for (i = 0; i < MIPS32_NUM_REGS; i++)
(*reg_list)[i] = &mips32->core_cache->reg_list[i];
/* add dummy floating points regs */
for (i = MIPS32NUMCOREREGS; i < (MIPS32NUMCOREREGS + MIPS32NUMFPREGS); i++)
(*reg_list)[i] = &mips32_gdb_dummy_fp_reg;
return ERROR_OK;
}
@ -200,7 +263,7 @@ int mips32_save_context(struct target *target)
/* read core registers */
mips32_pracc_read_regs(ejtag_info, mips32->core_regs);
for (i = 0; i < MIPS32NUMCOREREGS; i++) {
for (i = 0; i < MIPS32_NUM_REGS; i++) {
if (!mips32->core_cache->reg_list[i].valid)
mips32->read_core_reg(target, i);
}
@ -216,7 +279,7 @@ int mips32_restore_context(struct target *target)
struct mips32_common *mips32 = target_to_mips32(target);
struct mips_ejtag *ejtag_info = &mips32->ejtag_info;
for (i = 0; i < MIPS32NUMCOREREGS; i++) {
for (i = 0; i < MIPS32_NUM_REGS; i++) {
if (mips32->core_cache->reg_list[i].dirty)
mips32->write_core_reg(target, i);
}
@ -249,15 +312,14 @@ struct reg_cache *mips32_build_reg_cache(struct target *target)
/* get pointers to arch-specific information */
struct mips32_common *mips32 = target_to_mips32(target);
int num_regs = MIPS32NUMCOREREGS;
int num_regs = MIPS32_NUM_REGS;
struct reg_cache **cache_p = register_get_last_cache_p(&target->reg_cache);
struct reg_cache *cache = malloc(sizeof(struct reg_cache));
struct reg *reg_list = calloc(num_regs, sizeof(struct reg));
struct mips32_core_reg *arch_info = malloc(sizeof(struct mips32_core_reg) * num_regs);
struct reg_feature *feature;
int i;
register_init_dummy(&mips32_gdb_dummy_fp_reg);
/* Build the process context cache */
cache->name = "mips32 registers";
cache->next = NULL;
@ -273,11 +335,38 @@ struct reg_cache *mips32_build_reg_cache(struct target *target)
reg_list[i].name = mips32_regs[i].name;
reg_list[i].size = 32;
reg_list[i].value = calloc(1, 4);
if (mips32_regs[i].flag == MIPS32_GDB_DUMMY_FP_REG) {
reg_list[i].value = mips32_gdb_dummy_fp_value;
reg_list[i].valid = 1;
reg_list[i].arch_info = NULL;
register_init_dummy(&reg_list[i]);
} else {
reg_list[i].value = calloc(1, 4);
reg_list[i].valid = 0;
reg_list[i].type = &mips32_reg_type;
reg_list[i].arch_info = &arch_info[i];
reg_list[i].reg_data_type = calloc(1, sizeof(struct reg_data_type));
if (reg_list[i].reg_data_type)
reg_list[i].reg_data_type->type = mips32_regs[i].type;
else
LOG_ERROR("unable to allocate reg type list");
}
reg_list[i].dirty = 0;
reg_list[i].valid = 0;
reg_list[i].type = &mips32_reg_type;
reg_list[i].arch_info = &arch_info[i];
reg_list[i].group = mips32_regs[i].group;
reg_list[i].number = i;
reg_list[i].exist = true;
reg_list[i].caller_save = true; /* gdb defaults to true */
feature = calloc(1, sizeof(struct reg_feature));
if (feature) {
feature->name = mips32_regs[i].feature;
reg_list[i].feature = feature;
} else
LOG_ERROR("unable to allocate feature list");
}
return cache;
@ -345,7 +434,7 @@ int mips32_run_algorithm(struct target *target, int num_mem_params,
struct mips32_algorithm *mips32_algorithm_info = arch_info;
enum mips32_isa_mode isa_mode = mips32->isa_mode;
uint32_t context[MIPS32NUMCOREREGS];
uint32_t context[MIPS32_NUM_REGS];
int retval = ERROR_OK;
LOG_DEBUG("Running algorithm");
@ -364,7 +453,7 @@ int mips32_run_algorithm(struct target *target, int num_mem_params,
}
/* refresh core register cache */
for (unsigned int i = 0; i < MIPS32NUMCOREREGS; i++) {
for (unsigned int i = 0; i < MIPS32_NUM_REGS; i++) {
if (!mips32->core_cache->reg_list[i].valid)
mips32->read_core_reg(target, i);
context[i] = buf_get_u32(mips32->core_cache->reg_list[i].value, 0, 32);
@ -429,7 +518,7 @@ int mips32_run_algorithm(struct target *target, int num_mem_params,
}
/* restore everything we saved before */
for (unsigned int i = 0; i < MIPS32NUMCOREREGS; i++) {
for (unsigned int i = 0; i < MIPS32_NUM_REGS; i++) {
uint32_t regvalue;
regvalue = buf_get_u32(mips32->core_cache->reg_list[i].value, 0, 32);
if (regvalue != context[i]) {
@ -661,10 +750,10 @@ int mips32_checksum_memory(struct target *target, uint32_t address,
mips32_info.common_magic = MIPS32_COMMON_MAGIC;
mips32_info.isa_mode = MIPS32_ISA_MIPS32;
init_reg_param(&reg_params[0], "a0", 32, PARAM_IN_OUT);
init_reg_param(&reg_params[0], "r4", 32, PARAM_IN_OUT);
buf_set_u32(reg_params[0].value, 0, 32, address);
init_reg_param(&reg_params[1], "a1", 32, PARAM_OUT);
init_reg_param(&reg_params[1], "r5", 32, PARAM_OUT);
buf_set_u32(reg_params[1].value, 0, 32, count);
int timeout = 20000 * (1 + (count / (1024 * 1024)));
@ -716,13 +805,13 @@ int mips32_blank_check_memory(struct target *target,
mips32_info.common_magic = MIPS32_COMMON_MAGIC;
mips32_info.isa_mode = MIPS32_ISA_MIPS32;
init_reg_param(&reg_params[0], "a0", 32, PARAM_OUT);
init_reg_param(&reg_params[0], "r4", 32, PARAM_OUT);
buf_set_u32(reg_params[0].value, 0, 32, address);
init_reg_param(&reg_params[1], "a1", 32, PARAM_OUT);
init_reg_param(&reg_params[1], "r5", 32, PARAM_OUT);
buf_set_u32(reg_params[1].value, 0, 32, count);
init_reg_param(&reg_params[2], "a2", 32, PARAM_IN_OUT);
init_reg_param(&reg_params[2], "r6", 32, PARAM_IN_OUT);
buf_set_u32(reg_params[2].value, 0, 32, 0xff);
int retval = target_run_algorithm(target, 0, NULL, 3, reg_params,

1
src/target/mips32.h
View File

@ -66,6 +66,7 @@
/* offsets into mips32 core register cache */
enum {
MIPS32_PC = 37,
MIPS32_FIR = 71,
MIPS32NUMCOREREGS
};