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gdb/csky rm csky_memory_insert/remove_breakpoint

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Software breakpoints are inserted or removed by the gdb stub via
remote protocol, these two functions are no longer needed.
This commit is contained in:
Jiangshuai Li
2022-09-13 14:21:55 +08:00
parent d354e0c8e7
commit c0828c5a52
1 changed files with 0 additions and 201 deletions
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201
gdb/csky-tdep.c
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@ -2016,201 +2016,6 @@ csky_sw_breakpoint_from_kind (struct gdbarch *gdbarch, int kind, int *size)
}
}
/* Implement the memory_insert_breakpoint gdbarch method. */
static int
csky_memory_insert_breakpoint (struct gdbarch *gdbarch,
struct bp_target_info *bp_tgt)
{
int val;
const unsigned char *bp;
gdb_byte bp_write_record1[] = { 0, 0, 0, 0 };
gdb_byte bp_write_record2[] = { 0, 0, 0, 0 };
gdb_byte bp_record[] = { 0, 0, 0, 0 };
/* Sanity-check bp_address. */
if (bp_tgt->reqstd_address % 2)
warning (_("Invalid breakpoint address 0x%x is an odd number."),
(unsigned int) bp_tgt->reqstd_address);
scoped_restore restore_memory
= make_scoped_restore_show_memory_breakpoints (1);
/* Determine appropriate breakpoint_kind for this address. */
bp_tgt->kind = csky_breakpoint_kind_from_pc (gdbarch,
&bp_tgt->reqstd_address);
/* Save the memory contents. */
bp_tgt->shadow_len = bp_tgt->kind;
/* Fill bp_tgt->placed_address. */
bp_tgt->placed_address = bp_tgt->reqstd_address;
if (bp_tgt->kind == CSKY_INSN_SIZE16)
{
if ((bp_tgt->reqstd_address % 4) == 0)
{
/* Read two bytes. */
val = target_read_memory (bp_tgt->reqstd_address,
bp_tgt->shadow_contents, 2);
if (val)
return val;
/* Read two bytes. */
val = target_read_memory (bp_tgt->reqstd_address + 2,
bp_record, 2);
if (val)
return val;
/* Write the breakpoint. */
bp_write_record1[2] = bp_record[0];
bp_write_record1[3] = bp_record[1];
bp = bp_write_record1;
val = target_write_raw_memory (bp_tgt->reqstd_address, bp,
CSKY_WR_BKPT_MODE);
}
else
{
val = target_read_memory (bp_tgt->reqstd_address,
bp_tgt->shadow_contents, 2);
if (val)
return val;
val = target_read_memory (bp_tgt->reqstd_address - 2,
bp_record, 2);
if (val)
return val;
/* Write the breakpoint. */
bp_write_record1[0] = bp_record[0];
bp_write_record1[1] = bp_record[1];
bp = bp_write_record1;
val = target_write_raw_memory (bp_tgt->reqstd_address - 2,
bp, CSKY_WR_BKPT_MODE);
}
}
else
{
if (bp_tgt->placed_address % 4 == 0)
{
val = target_read_memory (bp_tgt->reqstd_address,
bp_tgt->shadow_contents,
CSKY_WR_BKPT_MODE);
if (val)
return val;
/* Write the breakpoint. */
bp = bp_write_record1;
val = target_write_raw_memory (bp_tgt->reqstd_address,
bp, CSKY_WR_BKPT_MODE);
}
else
{
val = target_read_memory (bp_tgt->reqstd_address,
bp_tgt->shadow_contents,
CSKY_WR_BKPT_MODE);
if (val)
return val;
val = target_read_memory (bp_tgt->reqstd_address - 2,
bp_record, 2);
if (val)
return val;
val = target_read_memory (bp_tgt->reqstd_address + 4,
bp_record + 2, 2);
if (val)
return val;
bp_write_record1[0] = bp_record[0];
bp_write_record1[1] = bp_record[1];
bp_write_record2[2] = bp_record[2];
bp_write_record2[3] = bp_record[3];
/* Write the breakpoint. */
bp = bp_write_record1;
val = target_write_raw_memory (bp_tgt->reqstd_address - 2, bp,
CSKY_WR_BKPT_MODE);
if (val)
return val;
/* Write the breakpoint. */
bp = bp_write_record2;
val = target_write_raw_memory (bp_tgt->reqstd_address + 2, bp,
CSKY_WR_BKPT_MODE);
}
}
return val;
}
/* Restore the breakpoint shadow_contents to the target. */
static int
csky_memory_remove_breakpoint (struct gdbarch *gdbarch,
struct bp_target_info *bp_tgt)
{
int val;
gdb_byte bp_record[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
/* Different for shadow_len 2 or 4. */
if (bp_tgt->shadow_len == 2)
{
/* Do word-sized writes on word-aligned boundaries and read
padding bytes as necessary. */
if (bp_tgt->reqstd_address % 4 == 0)
{
val = target_read_memory (bp_tgt->reqstd_address + 2,
bp_record + 2, 2);
if (val)
return val;
bp_record[0] = bp_tgt->shadow_contents[0];
bp_record[1] = bp_tgt->shadow_contents[1];
return target_write_raw_memory (bp_tgt->reqstd_address,
bp_record, CSKY_WR_BKPT_MODE);
}
else
{
val = target_read_memory (bp_tgt->reqstd_address - 2,
bp_record, 2);
if (val)
return val;
bp_record[2] = bp_tgt->shadow_contents[0];
bp_record[3] = bp_tgt->shadow_contents[1];
return target_write_raw_memory (bp_tgt->reqstd_address - 2,
bp_record, CSKY_WR_BKPT_MODE);
}
}
else
{
/* Do word-sized writes on word-aligned boundaries and read
padding bytes as necessary. */
if (bp_tgt->placed_address % 4 == 0)
{
return target_write_raw_memory (bp_tgt->reqstd_address,
bp_tgt->shadow_contents,
CSKY_WR_BKPT_MODE);
}
else
{
val = target_read_memory (bp_tgt->reqstd_address - 2,
bp_record, 2);
if (val)
return val;
val = target_read_memory (bp_tgt->reqstd_address + 4,
bp_record+6, 2);
if (val)
return val;
bp_record[2] = bp_tgt->shadow_contents[0];
bp_record[3] = bp_tgt->shadow_contents[1];
bp_record[4] = bp_tgt->shadow_contents[2];
bp_record[5] = bp_tgt->shadow_contents[3];
return target_write_raw_memory (bp_tgt->reqstd_address - 2,
bp_record,
CSKY_WR_BKPT_MODE * 2);
}
}
}
/* Determine link register type. */
static lr_type_t
@ -3062,12 +2867,6 @@ csky_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
frame_unwind_append_unwinder (gdbarch, &csky_stub_unwind);
frame_unwind_append_unwinder (gdbarch, &csky_unwind_cache);
/* Breakpoints. */
set_gdbarch_memory_insert_breakpoint (gdbarch,
csky_memory_insert_breakpoint);
set_gdbarch_memory_remove_breakpoint (gdbarch,
csky_memory_remove_breakpoint);
/* Hook in ABI-specific overrides, if they have been registered. */
gdbarch_init_osabi (info, gdbarch);