From: Matthias Welwarsky Date: Fri, 17 Feb 2017 15:21:41 +0000 (+0100) Subject: armv8_dpm: retrieve only necessary registers on halt X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=b73628141a932881953bb816ec7bfa47d9e40680;p=openocd armv8_dpm: retrieve only necessary registers on halt to speed up debugging, don't load the complete register context on a halt event, load only those registers that might be clobbered during debugging. Change-Id: I0b58e97aad6f28aefce4a52e870af61e1ef1a44f Signed-off-by: Matthias Welwarsky Reviewed-on: http://openocd.zylin.com/3995 Tested-by: jenkins Reviewed-by: Paul Fertser --- diff --git a/src/target/armv8_dpm.c b/src/target/armv8_dpm.c index ac53460e..e5d10df6 100644 --- a/src/target/armv8_dpm.c +++ b/src/target/armv8_dpm.c @@ -718,14 +718,22 @@ int armv8_dpm_read_current_registers(struct arm_dpm *dpm) cache = arm->core_cache; /* read R0 first (it's used for scratch), then CPSR */ - r = cache->reg_list + 0; + r = cache->reg_list + ARMV8_R0; if (!r->valid) { - retval = dpmv8_read_reg(dpm, r, 0); + retval = dpmv8_read_reg(dpm, r, ARMV8_R0); if (retval != ERROR_OK) goto fail; } r->dirty = true; + /* read R1, too, it will be clobbered during memory access */ + r = cache->reg_list + ARMV8_R1; + if (!r->valid) { + retval = dpmv8_read_reg(dpm, r, ARMV8_R1); + if (retval != ERROR_OK) + goto fail; + } + /* read cpsr to r0 and get it back */ retval = dpm->instr_read_data_r0(dpm, armv8_opcode(armv8, READ_REG_DSPSR), &cpsr); @@ -735,7 +743,7 @@ int armv8_dpm_read_current_registers(struct arm_dpm *dpm) /* update core mode and state */ armv8_set_cpsr(arm, cpsr); - for (unsigned int i = 1; i < cache->num_regs ; i++) { + for (unsigned int i = ARMV8_PC; i < cache->num_regs ; i++) { struct arm_reg *arm_reg; r = armv8_reg_current(arm, i);