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libdebugger: Use an offset table to format GDB g packets.

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Adding support for a register offset table lets FPU registers
be supported if added to the backend.

Closes #3733.
This commit is contained in:
Chris Johns
2019-04-08 13:17:08 +10:00
parent 8a8b95aa1d
commit 2c09b71faf
8 changed files with 478 additions and 215 deletions
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30
cpukit/libdebugger/rtems-debugger-target.h
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@@ -85,11 +85,15 @@ typedef struct rtems_debugger_target_swbreak {
/**
* The target data.
*
* reg_offset: Table of size_t offset of a register in the register
* table. The table has one more entry than reg_num where
* the last entry is the size of the register table.
*/
typedef struct rtems_debugger_target {
int capabilities; /*<< The capabilities to report. */
size_t reg_num; /*<< The number of registers. */
size_t reg_size; /*<< The size of a register. */
const size_t* reg_offset; /*<< The reg offsettable, len = reg_num + 1. */
const uint8_t* breakpoint; /*<< The breakpoint instruction(s). */
size_t breakpoint_size; /*<< The breakpoint size. */
rtems_debugger_block swbreaks; /*<< The software breakpoint block. */
@@ -133,9 +137,19 @@ extern uint32_t rtems_debugger_target_capabilities(void);
extern size_t rtems_debugger_target_reg_num(void);
/**
* Return the size of the regisers in bytes.
* Return the offset of a register in the register table.
*/
extern size_t rtems_debugger_target_reg_size(void);
extern size_t rtems_debugger_target_reg_size(size_t reg);
/**
* Return the offset of a register in the register table.
*/
extern size_t rtems_debugger_target_reg_offset(size_t reg);
/**
* Return the size of register table.
*/
extern size_t rtems_debugger_target_reg_table_size(void);
/**
* Read the regosters.
@@ -177,6 +191,11 @@ extern int rtems_debugger_target_thread_stepping(rtems_debugger_thread* thread);
*/
extern int rtems_debugger_target_exception_to_signal(CPU_Exception_frame* frame);
/**
* Print the target exception registers.
*/
extern void rtems_debugger_target_exception_print(CPU_Exception_frame* frame);
/**
* Software breakpoints. These are also referred to as memory breakpoints.
*/
@@ -245,6 +264,11 @@ extern int rtems_debugger_target_start_memory_access(void);
*/
extern void rtems_debugger_target_end_memory_access(void);
/**
* Is this a target memory access?
*/
extern bool rtems_debugger_target_is_memory_access(void);
#ifdef __cplusplus
}
#endif /* __cplusplus */