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ARM: remove semihosting globals 

Store a flag and errno in in "struct arm".
Have "poll" output report when semihosting is active.
Shrink some of the affected lines.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
This commit is contained in:
David Brownell 2009-12-04 16:51:48 -08:00
parent acd6d33994
commit bdde9460b9
5 changed files with 48 additions and 33 deletions
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22
src/target/arm7_9_common.c
View File

@ -2831,22 +2831,32 @@ COMMAND_HANDLER(handle_arm7_9_semihosting_command)
if (CMD_ARGC > 0)
{
COMMAND_PARSE_ENABLE(CMD_ARGV[0], semihosting_active);
int semihosting;
COMMAND_PARSE_ENABLE(CMD_ARGV[0], semihosting);
/* TODO: support other methods if vector catch is unavailable */
if (arm7_9->has_vector_catch) {
struct reg *vector_catch = &arm7_9->eice_cache->reg_list[EICE_VEC_CATCH];
struct reg *vector_catch = &arm7_9->eice_cache
->reg_list[EICE_VEC_CATCH];
if (!vector_catch->valid)
embeddedice_read_reg(vector_catch);
buf_set_u32(vector_catch->value, 2, 1, semihosting_active);
buf_set_u32(vector_catch->value, 2, 1, semihosting);
embeddedice_store_reg(vector_catch);
} else if (semihosting_active) {
/* FIXME never let that "catch" be dropped! */
arm7_9->armv4_5_common.is_semihosting = semihosting;
} else if (semihosting) {
command_print(CMD_CTX, "vector catch unavailable");
semihosting_active = 0;
}
}
command_print(CMD_CTX, "semihosting is %s", (semihosting_active) ? "enabled" : "disabled");
command_print(CMD_CTX, "semihosting is %s",
arm7_9->armv4_5_common.is_semihosting
? "enabled" : "disabled");
return ERROR_OK;
}

39
src/target/arm_semihosting.c
View File

@ -40,9 +40,6 @@
#include <helper/binarybuffer.h>
#include <helper/log.h>
/* TODO: this needs to be per target */
int semihosting_active;
int semihosting_errno;
static int do_semihosting(struct target *target)
{
@ -93,10 +90,10 @@ static int do_semihosting(struct target *target)
result = dup(1);
} else
result = open((char *)fn, mode);
semihosting_errno = errno;
armv4_5->semihosting_errno = errno;
} else {
result = -1;
semihosting_errno = EINVAL;
armv4_5->semihosting_errno = EINVAL;
}
}
break;
@ -108,7 +105,7 @@ static int do_semihosting(struct target *target)
else {
int fd = target_buffer_get_u32(target, params+0);
result = close(fd);
semihosting_errno = errno;
armv4_5->semihosting_errno = errno;
}
break;
@ -147,7 +144,7 @@ static int do_semihosting(struct target *target)
uint8_t *buf = malloc(l);
if (!buf) {
result = -1;
semihosting_errno = ENOMEM;
armv4_5->semihosting_errno = ENOMEM;
} else {
retval = target_read_buffer(target, a, l, buf);
if (retval != ERROR_OK) {
@ -155,7 +152,7 @@ static int do_semihosting(struct target *target)
return retval;
}
result = write(fd, buf, l);
semihosting_errno = errno;
armv4_5->semihosting_errno = errno;
if (result >= 0)
result = l - result;
free(buf);
@ -174,10 +171,10 @@ static int do_semihosting(struct target *target)
uint8_t *buf = malloc(l);
if (!buf) {
result = -1;
semihosting_errno = ENOMEM;
armv4_5->semihosting_errno = ENOMEM;
} else {
result = read(fd, buf, l);
semihosting_errno = errno;
armv4_5->semihosting_errno = errno;
if (result > 0) {
retval = target_write_buffer(target, a, result, buf);
if (retval != ERROR_OK) {
@ -217,7 +214,7 @@ static int do_semihosting(struct target *target)
int fd = target_buffer_get_u32(target, params+0);
off_t pos = target_buffer_get_u32(target, params+4);
result = lseek(fd, pos, SEEK_SET);
semihosting_errno = errno;
armv4_5->semihosting_errno = errno;
if (result == pos)
result = 0;
}
@ -231,14 +228,14 @@ static int do_semihosting(struct target *target)
int fd = target_buffer_get_u32(target, params+0);
off_t cur = lseek(fd, 0, SEEK_CUR);
if (cur == (off_t)-1) {
semihosting_errno = errno;
armv4_5->semihosting_errno = errno;
result = -1;
break;
}
result = lseek(fd, 0, SEEK_END);
semihosting_errno = errno;
armv4_5->semihosting_errno = errno;
if (lseek(fd, cur, SEEK_SET) == (off_t)-1) {
semihosting_errno = errno;
armv4_5->semihosting_errno = errno;
result = -1;
}
}
@ -258,10 +255,10 @@ static int do_semihosting(struct target *target)
return retval;
fn[l] = 0;
result = remove((char *)fn);
semihosting_errno = errno;
armv4_5->semihosting_errno = errno;
} else {
result = -1;
semihosting_errno = EINVAL;
armv4_5->semihosting_errno = EINVAL;
}
}
break;
@ -286,10 +283,10 @@ static int do_semihosting(struct target *target)
fn1[l1] = 0;
fn2[l2] = 0;
result = rename((char *)fn1, (char *)fn2);
semihosting_errno = errno;
armv4_5->semihosting_errno = errno;
} else {
result = -1;
semihosting_errno = EINVAL;
armv4_5->semihosting_errno = EINVAL;
}
}
break;
@ -299,7 +296,7 @@ static int do_semihosting(struct target *target)
break;
case 0x13: /* SYS_ERRNO */
result = semihosting_errno;
result = armv4_5->semihosting_errno;
break;
case 0x15: /* SYS_GET_CMDLINE */
@ -375,7 +372,7 @@ static int do_semihosting(struct target *target)
fprintf(stderr, "semihosting: unsupported call %#x\n",
(unsigned) r0);
result = -1;
semihosting_errno = ENOTSUP;
armv4_5->semihosting_errno = ENOTSUP;
}
/* resume execution to the original mode */
@ -408,7 +405,7 @@ int arm_semihosting(struct target *target, int *retval)
struct arm *armv4_5 = target_to_armv4_5(target);
uint32_t lr, spsr;
if (!semihosting_active ||
if (!armv4_5->is_semihosting ||
armv4_5->core_mode != ARMV4_5_MODE_SVC ||
buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32) != 0x08)
return 0;

2
src/target/arm_semihosting.h
View File

@ -21,8 +21,6 @@
#ifndef ARM_SEMIHOSTING_H
#define ARM_SEMIHOSTING_H
extern int semihosting_active;
int arm_semihosting(struct target *target, int *retval);
#endif

12
src/target/armv4_5.c
View File

@ -587,16 +587,20 @@ int armv4_5_arch_state(struct target *target)
if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
{
LOG_ERROR("BUG: called for a non-ARMv4/5 target");
LOG_ERROR("BUG: called for a non-ARM target");
return ERROR_FAIL;
}
LOG_USER("target halted in %s state due to %s, current mode: %s\ncpsr: 0x%8.8" PRIx32 " pc: 0x%8.8" PRIx32 "",
LOG_USER("target halted in %s state due to %s, current mode: %s\n"
"cpsr: 0x%8.8" PRIx32 " pc: 0x%8.8" PRIx32 "%s",
armv4_5_state_strings[armv4_5->core_state],
Jim_Nvp_value2name_simple(nvp_target_debug_reason, target->debug_reason)->name,
Jim_Nvp_value2name_simple(nvp_target_debug_reason,
target->debug_reason)->name,
arm_mode_name(armv4_5->core_mode),
buf_get_u32(armv4_5->cpsr->value, 0, 32),
buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
buf_get_u32(armv4_5->core_cache->reg_list[15].value,
0, 32),
armv4_5->is_semihosting ? ", semihosting" : "");
return ERROR_OK;
}

6
src/target/armv4_5.h
View File

@ -103,6 +103,12 @@ struct arm
/** Flag reporting unavailability of the BKPT instruction. */
bool is_armv4;
/** Flag reporting whether semihosting is active. */
bool is_semihosting;
/** Value to be returned by semihosting SYS_ERRNO request. */
int semihosting_errno;
/** Backpointer to the target. */
struct target *target;