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ARMv7-M: make DAP commands verify target is an ARMv7-M 

Init the ARMv7-M magic number.  Define predicate verifying it.
Use it to resolve a lurking bug/FIXME:  make sure the ARMv7-M
specific DAP ops reject non-ARMv7-M targets.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
This commit is contained in:
David Brownell 2010-02-04 14:39:51 -08:00
parent 3ea9e62189
commit ff5deeeeaa
2 changed files with 31 additions and 3 deletions
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29
src/target/armv7m.c
View File

@ -538,7 +538,7 @@ struct reg_cache *armv7m_build_reg_cache(struct target *target)
/** Sets up target as a generic ARMv7-M core */
int armv7m_init_arch_info(struct target *target, struct armv7m_common *armv7m)
{
/* register arch-specific functions */
armv7m->common_magic = ARMV7M_COMMON_MAGIC;
target->arch_info = armv7m;
armv7m->read_core_reg = armv7m_read_core_reg;
@ -737,8 +737,6 @@ int armv7m_maybe_skip_bkpt_inst(struct target *target, bool *inst_found)
/*
* Only stuff below this line should need to verify that its target
* is an ARMv7-M node.
*
* FIXME yet none of it _does_ verify target types yet!
*/
@ -752,6 +750,11 @@ COMMAND_HANDLER(handle_dap_baseaddr_command)
struct armv7m_common *armv7m = target_to_armv7m(target);
struct swjdp_common *swjdp = &armv7m->swjdp_info;
if (!is_armv7m(armv7m)) {
command_print(CMD_CTX, "current target isn't an ARM7-M");
return ERROR_TARGET_INVALID;
}
return CALL_COMMAND_HANDLER(dap_baseaddr_command, swjdp);
}
@ -765,6 +768,11 @@ COMMAND_HANDLER(handle_dap_apid_command)
struct armv7m_common *armv7m = target_to_armv7m(target);
struct swjdp_common *swjdp = &armv7m->swjdp_info;
if (!is_armv7m(armv7m)) {
command_print(CMD_CTX, "current target isn't an ARM7-M");
return ERROR_TARGET_INVALID;
}
return CALL_COMMAND_HANDLER(dap_apid_command, swjdp);
}
@ -774,6 +782,11 @@ COMMAND_HANDLER(handle_dap_apsel_command)
struct armv7m_common *armv7m = target_to_armv7m(target);
struct swjdp_common *swjdp = &armv7m->swjdp_info;
if (!is_armv7m(armv7m)) {
command_print(CMD_CTX, "current target isn't an ARM7-M");
return ERROR_TARGET_INVALID;
}
return CALL_COMMAND_HANDLER(dap_apsel_command, swjdp);
}
@ -783,6 +796,11 @@ COMMAND_HANDLER(handle_dap_memaccess_command)
struct armv7m_common *armv7m = target_to_armv7m(target);
struct swjdp_common *swjdp = &armv7m->swjdp_info;
if (!is_armv7m(armv7m)) {
command_print(CMD_CTX, "current target isn't an ARM7-M");
return ERROR_TARGET_INVALID;
}
return CALL_COMMAND_HANDLER(dap_memaccess_command, swjdp);
}
@ -794,6 +812,11 @@ COMMAND_HANDLER(handle_dap_info_command)
struct swjdp_common *swjdp = &armv7m->swjdp_info;
uint32_t apsel;
if (!is_armv7m(armv7m)) {
command_print(CMD_CTX, "current target isn't an ARM7-M");
return ERROR_TARGET_INVALID;
}
switch (CMD_ARGC) {
case 0:
apsel = swjdp->apsel;

5
src/target/armv7m.h
View File

@ -131,6 +131,11 @@ target_to_armv7m(struct target *target)
return target->arch_info;
}
static inline bool is_armv7m(struct armv7m_common *armv7m)
{
return armv7m->common_magic == ARMV7M_COMMON_MAGIC;
}
struct armv7m_algorithm
{
int common_magic;