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target/arm: Add the XML dynamic generation

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Generate an XML description for the cp-regs.
Register these regs with the gdb_register_coprocessor().
Add arm_gdb_get_sysreg() to use it as a callback to read those regs.
Add a dummy arm_gdb_set_sysreg().

Signed-off-by: Abdallah Bouassida <abdallah.bouassida@lauterbach.com>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 1524153386-3550-4-git-send-email-abdallah.bouassida@lauterbach.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Abdallah Bouassida 2018-05-18 17:48:07 +01:00 • committed by Peter Maydell
parent 9c513e786d
commit 200bf5b7ff
6 changed files with 143 additions and 1 deletions
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26
target/arm/cpu.h
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@ -133,6 +133,19 @@ enum {
s<2n+1> maps to the most significant half of d<n>
*/
/**
* DynamicGDBXMLInfo:
* @desc: Contains the XML descriptions.
* @num_cpregs: Number of the Coprocessor registers seen by GDB.
* @cpregs_keys: Array that contains the corresponding Key of
* a given cpreg with the same order of the cpreg in the XML description.
*/
typedef struct DynamicGDBXMLInfo {
char *desc;
int num_cpregs;
uint32_t *cpregs_keys;
} DynamicGDBXMLInfo;
/* CPU state for each instance of a generic timer (in cp15 c14) */
typedef struct ARMGenericTimer {
uint64_t cval; /* Timer CompareValue register */
@ -687,6 +700,8 @@ struct ARMCPU {
uint64_t *cpreg_vmstate_values;
int32_t cpreg_vmstate_array_len;
DynamicGDBXMLInfo dyn_xml;
/* Timers used by the generic (architected) timer */
QEMUTimer *gt_timer[NUM_GTIMERS];
/* GPIO outputs for generic timer */
@ -868,6 +883,17 @@ hwaddr arm_cpu_get_phys_page_attrs_debug(CPUState *cpu, vaddr addr,
int arm_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
int arm_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
/* Dynamically generates for gdb stub an XML description of the sysregs from
* the cp_regs hashtable. Returns the registered sysregs number.
*/
int arm_gen_dynamic_xml(CPUState *cpu);
/* Returns the dynamically generated XML for the gdb stub.
* Returns a pointer to the XML contents for the specified XML file or NULL
* if the XML name doesn't match the predefined one.
*/
const char *arm_gdb_get_dynamic_xml(CPUState *cpu, const char *xmlname);
int arm_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
int cpuid, void *opaque);
int arm_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,