diff options
Diffstat (limited to 'src/target/arm_semihosting.c')
| -rw-r--r-- | src/target/arm_semihosting.c | 84 |
1 files changed, 66 insertions, 18 deletions
diff --git a/src/target/arm_semihosting.c b/src/target/arm_semihosting.c index 57f3139c..31ca7792 100644 --- a/src/target/arm_semihosting.c +++ b/src/target/arm_semihosting.c @@ -46,6 +46,7 @@ #include "arm7_9_common.h" #include "armv7m.h" #include "armv7a.h" +#include "armv8.h" #include "cortex_m.h" #include "register.h" #include "arm_opcodes.h" @@ -55,6 +56,28 @@ #include <helper/log.h> #include <sys/stat.h> +static int arm_semihosting_resume(struct target *target, int *retval) +{ + if (is_armv8(target_to_armv8(target))) { + struct armv8_common *armv8 = target_to_armv8(target); + if (armv8->last_run_control_op == ARMV8_RUNCONTROL_RESUME) { + *retval = target_resume(target, 1, 0, 0, 0); + if (*retval != ERROR_OK) { + LOG_ERROR("Failed to resume target"); + return 0; + } + } else if (armv8->last_run_control_op == ARMV8_RUNCONTROL_STEP) + target->debug_reason = DBG_REASON_SINGLESTEP; + } else { + *retval = target_resume(target, 1, 0, 0, 0); + if (*retval != ERROR_OK) { + LOG_ERROR("Failed to resume target"); + return 0; + } + } + return 1; +} + static int post_result(struct target *target) { struct arm *arm = target_to_arm(target); @@ -88,6 +111,16 @@ static int post_result(struct target *target) if (spsr & 0x20) arm->core_state = ARM_STATE_THUMB; + } else if (is_armv8(target_to_armv8(target))) { + if (arm->core_state == ARM_STATE_AARCH64) { + /* return value in R0 */ + buf_set_u64(arm->core_cache->reg_list[0].value, 0, 64, target->semihosting->result); + arm->core_cache->reg_list[0].dirty = 1; + + uint64_t pc = buf_get_u64(arm->core_cache->reg_list[32].value, 0, 64); + buf_set_u64(arm->pc->value, 0, 64, pc + 4); + arm->pc->dirty = 1; + } } else { /* resume execution, this will be pc+2 to skip over the * bkpt instruction */ @@ -235,6 +268,24 @@ int arm_semihosting(struct target *target, int *retval) /* bkpt 0xAB */ if (insn != 0xBEAB) return 0; + } else if (is_armv8(target_to_armv8(target))) { + if (target->debug_reason != DBG_REASON_BREAKPOINT) + return 0; + + if (arm->core_state == ARM_STATE_AARCH64) { + uint32_t insn = 0; + r = arm->pc; + uint64_t pc64 = buf_get_u64(r->value, 0, 64); + *retval = target_read_u32(target, pc64, &insn); + + if (*retval != ERROR_OK) + return 1; + + /* bkpt 0xAB */ + if (insn != 0xD45E0000) + return 0; + } else + return 1; } else { LOG_ERROR("Unsupported semi-hosting Target"); return 0; @@ -244,13 +295,18 @@ int arm_semihosting(struct target *target, int *retval) * operation to complete. */ if (!semihosting->hit_fileio) { - /* TODO: update for 64-bits */ - uint32_t r0 = buf_get_u32(arm->core_cache->reg_list[0].value, 0, 32); - uint32_t r1 = buf_get_u32(arm->core_cache->reg_list[1].value, 0, 32); - - semihosting->op = r0; - semihosting->param = r1; - semihosting->word_size_bytes = 4; + if (is_armv8(target_to_armv8(target)) && + arm->core_state == ARM_STATE_AARCH64) { + /* Read op and param from register x0 and x1 respectively. */ + semihosting->op = buf_get_u64(arm->core_cache->reg_list[0].value, 0, 64); + semihosting->param = buf_get_u64(arm->core_cache->reg_list[1].value, 0, 64); + semihosting->word_size_bytes = 8; + } else { + /* Read op and param from register r0 and r1 respectively. */ + semihosting->op = buf_get_u32(arm->core_cache->reg_list[0].value, 0, 32); + semihosting->param = buf_get_u32(arm->core_cache->reg_list[1].value, 0, 32); + semihosting->word_size_bytes = 4; + } /* Check for ARM operation numbers. */ if (0 <= semihosting->op && semihosting->op <= 0x31) { @@ -265,19 +321,11 @@ int arm_semihosting(struct target *target, int *retval) } } - /* Post result to target if we are not waiting on a fileio + /* Resume if target it is resumable and we are not waiting on a fileio * operation to complete: */ - if (semihosting->is_resumable && !semihosting->hit_fileio) { - /* Resume right after the BRK instruction. */ - *retval = target_resume(target, 1, 0, 0, 0); - if (*retval != ERROR_OK) { - LOG_ERROR("Failed to resume target"); - return 0; - } - - return 1; - } + if (semihosting->is_resumable && !semihosting->hit_fileio) + return arm_semihosting_resume(target, retval); return 0; } |