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ARM semihosting: use breakpoint on ARM7 

Fall back to software breakpoint when vector catch isn't available.

Possible enhancements:

 - add extra optional command parameter to select high vectors
 - add extra optional command parameter to select hardware breakpoint

Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
This commit is contained in:
Nicolas Pitre 2009-12-05 01:01:55 -05:00 committed by David Brownell
parent e8599cc3d8
commit ec8c3b5a67
1 changed files with 10 additions and 8 deletions
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18
src/target/arm7_9_common.c
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@ -2835,7 +2835,6 @@ COMMAND_HANDLER(handle_arm7_9_semihosting_command)
COMMAND_PARSE_ENABLE(CMD_ARGV[0], semihosting); COMMAND_PARSE_ENABLE(CMD_ARGV[0], semihosting);
/* TODO: support other methods if vector catch is unavailable */
if (arm7_9->has_vector_catch) { if (arm7_9->has_vector_catch) {
struct reg *vector_catch = &arm7_9->eice_cache struct reg *vector_catch = &arm7_9->eice_cache
->reg_list[EICE_VEC_CATCH]; ->reg_list[EICE_VEC_CATCH];
@ -2844,14 +2843,17 @@ COMMAND_HANDLER(handle_arm7_9_semihosting_command)
embeddedice_read_reg(vector_catch); embeddedice_read_reg(vector_catch);
buf_set_u32(vector_catch->value, 2, 1, semihosting); buf_set_u32(vector_catch->value, 2, 1, semihosting);
embeddedice_store_reg(vector_catch); embeddedice_store_reg(vector_catch);
} else {
/* FIXME never let that "catch" be dropped! */ /* TODO: allow optional high vectors and/or BKPT_HARD */
if (semihosting)
arm7_9->armv4_5_common.is_semihosting = semihosting; breakpoint_add(target, 8, 4, BKPT_SOFT);
else
} else if (semihosting) { breakpoint_remove(target, 8);
command_print(CMD_CTX, "vector catch unavailable");
} }
/* FIXME never let that "catch" be dropped! */
arm7_9->armv4_5_common.is_semihosting = semihosting;
} }
command_print(CMD_CTX, "semihosting is %s", command_print(CMD_CTX, "semihosting is %s",