[GDBserver][AArch64] Make watchpoint support use target_hw_bp_type.
This makes linux-aarch64-low.c use target_hw_bp_type, like gdb's aarch64-linux-nat.c. The original motivation is decoupling insert_point/remove_point from Z packet numbers, but I think making the files a little bit more similar is a good thing on its own right. Ideally we'd merge these files even... The aarch64_point_encode_ctrl_reg change is taken straight from GDB's copy. I confirmed with a cross compiler that this builds, but it's otherwise untested. gdb/gdbserver/ 2014-05-20 Pedro Alves <palves@redhat.com> * linux-aarch64-low.c: Include break-common.h. (enum target_point_type): Delete. (Z_packet_to_point_type): Rename to ... (Z_packet_to_target_hw_bp_type): ... this, and return a target_hw_bp_type instead. (aarch64_show_debug_reg_state): Take an enum target_hw_bp_type instead of an enum target_point_type. (aarch64_point_encode_ctrl_reg): Likewise. Compute type mask from breakpoint type. (aarch64_dr_state_insert_one_point) (aarch64_dr_state_remove_one_point, aarch64_handle_breakpoint) (aarch64_handle_aligned_watchpoint) (aarch64_handle_unaligned_watchpoint, aarch64_handle_watchpoint): Take an enum target_hw_bp_type instead of an enum target_point_type. (aarch64_supports_z_point_type): New function. (aarch64_insert_point, aarch64_remove_point): Use it. Adjust to use Z_packet_to_target_hw_bp_type.
This commit is contained in:
Pedro Alves
parent
786dc51990
commit
4ff0d3d82d
2 changed files with 82 additions and 39 deletions
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@ -1,3 +1,24 @@
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2014-05-20 Pedro Alves <palves@redhat.com>
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* linux-aarch64-low.c: Include break-common.h.
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(enum target_point_type): Delete.
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(Z_packet_to_point_type): Rename to ...
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(Z_packet_to_target_hw_bp_type): ... this, and return a
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target_hw_bp_type instead.
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(aarch64_show_debug_reg_state): Take an enum target_hw_bp_type
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instead of an enum target_point_type.
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(aarch64_point_encode_ctrl_reg): Likewise. Compute type mask from
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breakpoint type.
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(aarch64_dr_state_insert_one_point)
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(aarch64_dr_state_remove_one_point, aarch64_handle_breakpoint)
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(aarch64_handle_aligned_watchpoint)
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(aarch64_handle_unaligned_watchpoint, aarch64_handle_watchpoint):
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Take an enum target_hw_bp_type instead of an enum
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target_point_type.
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(aarch64_supports_z_point_type): New function.
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(aarch64_insert_point, aarch64_remove_point): Use it. Adjust to
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use Z_packet_to_target_hw_bp_type.
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2014-05-20 Joel Brobecker <brobecker@adacore.com>
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* configure.ac: Only use -Werror by default when DEVELOPMENT
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@ -29,6 +29,7 @@
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#include <sys/uio.h>
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#include "gdb_proc_service.h"
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#include "break-common.h"
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/* Defined in auto-generated files. */
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void init_registers_aarch64 (void);
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@ -208,36 +209,20 @@ struct arch_lwp_info
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static int aarch64_num_bp_regs;
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static int aarch64_num_wp_regs;
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/* Hardware breakpoint/watchpoint types.
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The values map to their encodings in the bit 4 and bit 3 of the
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hardware breakpoint/watchpoint control registers. */
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enum target_point_type
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{
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hw_execute = 0, /* Execute HW breakpoint */
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hw_read = 1, /* Read HW watchpoint */
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hw_write = 2, /* Common HW watchpoint */
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hw_access = 3, /* Access HW watchpoint */
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point_type_unsupported
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};
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#define Z_PACKET_SW_BP '0'
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#define Z_PACKET_HW_BP '1'
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#define Z_PACKET_WRITE_WP '2'
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#define Z_PACKET_READ_WP '3'
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#define Z_PACKET_ACCESS_WP '4'
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/* Map the protocol breakpoint/watchpoint type TYPE to
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enum target_point_type. */
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/* Map the protocol breakpoint/watchpoint type TYPE to enum
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target_hw_bp_type. */
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static enum target_point_type
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Z_packet_to_point_type (char type)
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static enum target_hw_bp_type
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Z_packet_to_target_hw_bp_type (char type)
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{
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switch (type)
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{
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case Z_PACKET_SW_BP:
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/* Leave the handling of the sw breakpoint with the gdb client. */
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return point_type_unsupported;
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case Z_PACKET_HW_BP:
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return hw_execute;
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case Z_PACKET_WRITE_WP:
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@ -247,7 +232,7 @@ Z_packet_to_point_type (char type)
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case Z_PACKET_ACCESS_WP:
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return hw_access;
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default:
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return point_type_unsupported;
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fatal ("bad watchpoint type %c", type);
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}
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}
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@ -358,7 +343,7 @@ aarch64_breakpoint_at (CORE_ADDR where)
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static void
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aarch64_show_debug_reg_state (struct aarch64_debug_reg_state *state,
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const char *func, CORE_ADDR addr,
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int len, enum target_point_type type)
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int len, enum target_hw_bp_type type)
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{
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int i;
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@ -448,12 +433,31 @@ aarch64_watchpoint_length (unsigned int ctrl)
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breakpoint/watchpoint control register. */
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static unsigned int
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aarch64_point_encode_ctrl_reg (enum target_point_type type, int len)
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aarch64_point_encode_ctrl_reg (enum target_hw_bp_type type, int len)
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{
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unsigned int ctrl;
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unsigned int ctrl, ttype;
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/* type */
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ctrl = type << 3;
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switch (type)
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{
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case hw_write:
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ttype = 2;
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break;
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case hw_read:
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ttype = 1;
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break;
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case hw_access:
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ttype = 3;
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break;
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case hw_execute:
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ttype = 0;
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break;
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default:
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perror_with_name (_("Unrecognized breakpoint/watchpoint type"));
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}
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/* type */
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ctrl = ttype << 3;
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/* length bitmask */
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ctrl |= ((1 << len) - 1) << 5;
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/* enabled at el0 */
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@ -749,7 +753,7 @@ aarch64_get_debug_reg_state ()
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static int
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aarch64_dr_state_insert_one_point (struct aarch64_debug_reg_state *state,
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enum target_point_type type,
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enum target_hw_bp_type type,
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CORE_ADDR addr, int len)
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{
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int i, idx, num_regs, is_watchpoint;
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@ -822,7 +826,7 @@ aarch64_dr_state_insert_one_point (struct aarch64_debug_reg_state *state,
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static int
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aarch64_dr_state_remove_one_point (struct aarch64_debug_reg_state *state,
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enum target_point_type type,
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enum target_hw_bp_type type,
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CORE_ADDR addr, int len)
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{
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int i, num_regs, is_watchpoint;
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@ -876,7 +880,7 @@ aarch64_dr_state_remove_one_point (struct aarch64_debug_reg_state *state,
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}
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static int
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aarch64_handle_breakpoint (enum target_point_type type, CORE_ADDR addr,
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aarch64_handle_breakpoint (enum target_hw_bp_type type, CORE_ADDR addr,
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int len, int is_insert)
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{
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struct aarch64_debug_reg_state *state;
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@ -898,7 +902,7 @@ aarch64_handle_breakpoint (enum target_point_type type, CORE_ADDR addr,
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from that it is an aligned watchpoint to be handled. */
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static int
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aarch64_handle_aligned_watchpoint (enum target_point_type type,
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aarch64_handle_aligned_watchpoint (enum target_hw_bp_type type,
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CORE_ADDR addr, int len, int is_insert)
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{
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struct aarch64_debug_reg_state *state;
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@ -919,7 +923,7 @@ aarch64_handle_aligned_watchpoint (enum target_point_type type,
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Return 0 if succeed. */
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static int
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aarch64_handle_unaligned_watchpoint (enum target_point_type type,
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aarch64_handle_unaligned_watchpoint (enum target_hw_bp_type type,
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CORE_ADDR addr, int len, int is_insert)
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{
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struct aarch64_debug_reg_state *state
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@ -956,7 +960,7 @@ aarch64_handle_unaligned_watchpoint (enum target_point_type type,
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}
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static int
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aarch64_handle_watchpoint (enum target_point_type type, CORE_ADDR addr,
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aarch64_handle_watchpoint (enum target_hw_bp_type type, CORE_ADDR addr,
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int len, int is_insert)
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{
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if (aarch64_point_is_aligned (1 /* is_watchpoint */ , addr, len))
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@ -965,6 +969,22 @@ aarch64_handle_watchpoint (enum target_point_type type, CORE_ADDR addr,
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return aarch64_handle_unaligned_watchpoint (type, addr, len, is_insert);
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}
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static int
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aarch64_supports_z_point_type (char z_type)
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{
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switch (z_type)
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{
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case Z_PACKET_HW_BP:
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case Z_PACKET_WRITE_WP:
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case Z_PACKET_READ_WP:
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case Z_PACKET_ACCESS_WP:
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return 1;
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default:
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/* Leave the handling of sw breakpoints with the gdb client. */
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return 0;
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}
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}
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/* Insert a hardware breakpoint/watchpoint.
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It actually only records the info of the to-be-inserted bp/wp;
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the actual insertion will happen when threads are resumed.
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@ -977,16 +997,17 @@ static int
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aarch64_insert_point (char type, CORE_ADDR addr, int len)
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{
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int ret;
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enum target_point_type targ_type;
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enum target_hw_bp_type targ_type;
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if (!aarch64_supports_z_point_type (type))
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return 1;
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if (debug_hw_points)
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fprintf (stderr, "insert_point on entry (addr=0x%08lx, len=%d)\n",
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(unsigned long) addr, len);
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/* Determine the type from the packet. */
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targ_type = Z_packet_to_point_type (type);
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if (targ_type == point_type_unsupported)
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return 1;
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targ_type = Z_packet_to_target_hw_bp_type (type);
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if (targ_type != hw_execute)
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ret =
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@ -1014,16 +1035,17 @@ static int
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aarch64_remove_point (char type, CORE_ADDR addr, int len)
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{
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int ret;
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enum target_point_type targ_type;
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enum target_hw_bp_type targ_type;
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if (!aarch64_supports_z_point_type (type))
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return 1;
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if (debug_hw_points)
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fprintf (stderr, "remove_point on entry (addr=0x%08lx, len=%d)\n",
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(unsigned long) addr, len);
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/* Determine the type from the packet. */
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targ_type = Z_packet_to_point_type (type);
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if (targ_type == point_type_unsupported)
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return 1;
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targ_type = Z_packet_to_target_hw_bp_type (type);
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/* Set up state pointers. */
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if (targ_type != hw_execute)
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