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Diffstat (limited to 'arch/mn10300/kernel/gdb-stub.c')
-rw-r--r--arch/mn10300/kernel/gdb-stub.c95
1 files changed, 56 insertions, 39 deletions
diff --git a/arch/mn10300/kernel/gdb-stub.c b/arch/mn10300/kernel/gdb-stub.c
index a5fc3f05309..a128c57b586 100644
--- a/arch/mn10300/kernel/gdb-stub.c
+++ b/arch/mn10300/kernel/gdb-stub.c
@@ -130,10 +130,9 @@
#include <linux/bug.h>
#include <asm/pgtable.h>
-#include <asm/system.h>
#include <asm/gdb-stub.h>
#include <asm/exceptions.h>
-#include <asm/cacheflush.h>
+#include <asm/debugger.h>
#include <asm/serial-regs.h>
#include <asm/busctl-regs.h>
#include <unit/leds.h>
@@ -405,6 +404,7 @@ static int hexToInt(char **ptr, int *intValue)
return (numChars);
}
+#ifdef CONFIG_GDBSTUB_ALLOW_SINGLE_STEP
/*
* We single-step by setting breakpoints. When an exception
* is handled, we need to restore the instructions hoisted
@@ -729,6 +729,7 @@ static int gdbstub_single_step(struct pt_regs *regs)
__gdbstub_restore_bp();
return -EFAULT;
}
+#endif /* CONFIG_GDBSTUB_ALLOW_SINGLE_STEP */
#ifdef CONFIG_GDBSTUB_CONSOLE
@@ -796,7 +797,7 @@ unsigned char *mem2hex(const void *_mem, char *buf, int count, int may_fault)
if ((u32) mem & 1 && count >= 1) {
if (gdbstub_read_byte(mem, ch) != 0)
return 0;
- buf = pack_hex_byte(buf, ch[0]);
+ buf = hex_byte_pack(buf, ch[0]);
mem++;
count--;
}
@@ -804,8 +805,8 @@ unsigned char *mem2hex(const void *_mem, char *buf, int count, int may_fault)
if ((u32) mem & 3 && count >= 2) {
if (gdbstub_read_word(mem, ch) != 0)
return 0;
- buf = pack_hex_byte(buf, ch[0]);
- buf = pack_hex_byte(buf, ch[1]);
+ buf = hex_byte_pack(buf, ch[0]);
+ buf = hex_byte_pack(buf, ch[1]);
mem += 2;
count -= 2;
}
@@ -813,10 +814,10 @@ unsigned char *mem2hex(const void *_mem, char *buf, int count, int may_fault)
while (count >= 4) {
if (gdbstub_read_dword(mem, ch) != 0)
return 0;
- buf = pack_hex_byte(buf, ch[0]);
- buf = pack_hex_byte(buf, ch[1]);
- buf = pack_hex_byte(buf, ch[2]);
- buf = pack_hex_byte(buf, ch[3]);
+ buf = hex_byte_pack(buf, ch[0]);
+ buf = hex_byte_pack(buf, ch[1]);
+ buf = hex_byte_pack(buf, ch[2]);
+ buf = hex_byte_pack(buf, ch[3]);
mem += 4;
count -= 4;
}
@@ -824,8 +825,8 @@ unsigned char *mem2hex(const void *_mem, char *buf, int count, int may_fault)
if (count >= 2) {
if (gdbstub_read_word(mem, ch) != 0)
return 0;
- buf = pack_hex_byte(buf, ch[0]);
- buf = pack_hex_byte(buf, ch[1]);
+ buf = hex_byte_pack(buf, ch[0]);
+ buf = hex_byte_pack(buf, ch[1]);
mem += 2;
count -= 2;
}
@@ -833,7 +834,7 @@ unsigned char *mem2hex(const void *_mem, char *buf, int count, int may_fault)
if (count >= 1) {
if (gdbstub_read_byte(mem, ch) != 0)
return 0;
- buf = pack_hex_byte(buf, ch[0]);
+ buf = hex_byte_pack(buf, ch[0]);
}
*buf = 0;
@@ -1171,7 +1172,7 @@ int gdbstub_clear_breakpoint(u8 *addr, int len)
/*
* This function does all command processing for interfacing to gdb
- * - returns 1 if the exception should be skipped, 0 otherwise.
+ * - returns 0 if the exception should be skipped, -ERROR otherwise.
*/
static int gdbstub(struct pt_regs *regs, enum exception_code excep)
{
@@ -1186,7 +1187,7 @@ static int gdbstub(struct pt_regs *regs, enum exception_code excep)
int loop;
if (excep == EXCEP_FPU_DISABLED)
- return 0;
+ return -ENOTSUPP;
gdbstub_flush_caches = 0;
@@ -1194,7 +1195,8 @@ static int gdbstub(struct pt_regs *regs, enum exception_code excep)
asm volatile("mov mdr,%0" : "=d"(mdr));
local_save_flags(epsw);
- local_change_intr_mask_level(NUM2EPSW_IM(CONFIG_GDBSTUB_IRQ_LEVEL + 1));
+ arch_local_change_intr_mask_level(
+ NUM2EPSW_IM(CONFIG_DEBUGGER_IRQ_LEVEL + 1));
gdbstub_store_fpu();
@@ -1207,11 +1209,13 @@ static int gdbstub(struct pt_regs *regs, enum exception_code excep)
/* if we were single stepping, restore the opcodes hoisted for the
* breakpoint[s] */
broke = 0;
+#ifdef CONFIG_GDBSTUB_ALLOW_SINGLE_STEP
if ((step_bp[0].addr && step_bp[0].addr == (u8 *) regs->pc) ||
(step_bp[1].addr && step_bp[1].addr == (u8 *) regs->pc))
broke = 1;
__gdbstub_restore_bp();
+#endif
if (gdbstub_rx_unget) {
sigval = SIGINT;
@@ -1268,13 +1272,13 @@ static int gdbstub(struct pt_regs *regs, enum exception_code excep)
ptr = mem2hex(title, ptr, sizeof(title) - 1, 0);
hx = hex_asc_hi(excep >> 8);
- ptr = pack_hex_byte(ptr, hx);
+ ptr = hex_byte_pack(ptr, hx);
hx = hex_asc_lo(excep >> 8);
- ptr = pack_hex_byte(ptr, hx);
+ ptr = hex_byte_pack(ptr, hx);
hx = hex_asc_hi(excep);
- ptr = pack_hex_byte(ptr, hx);
+ ptr = hex_byte_pack(ptr, hx);
hx = hex_asc_lo(excep);
- ptr = pack_hex_byte(ptr, hx);
+ ptr = hex_byte_pack(ptr, hx);
ptr = mem2hex(crlf, ptr, sizeof(crlf) - 1, 0);
*ptr = 0;
@@ -1286,21 +1290,21 @@ static int gdbstub(struct pt_regs *regs, enum exception_code excep)
ptr = mem2hex(tbcberr, ptr, sizeof(tbcberr) - 1, 0);
hx = hex_asc_hi(bcberr >> 24);
- ptr = pack_hex_byte(ptr, hx);
+ ptr = hex_byte_pack(ptr, hx);
hx = hex_asc_lo(bcberr >> 24);
- ptr = pack_hex_byte(ptr, hx);
+ ptr = hex_byte_pack(ptr, hx);
hx = hex_asc_hi(bcberr >> 16);
- ptr = pack_hex_byte(ptr, hx);
+ ptr = hex_byte_pack(ptr, hx);
hx = hex_asc_lo(bcberr >> 16);
- ptr = pack_hex_byte(ptr, hx);
+ ptr = hex_byte_pack(ptr, hx);
hx = hex_asc_hi(bcberr >> 8);
- ptr = pack_hex_byte(ptr, hx);
+ ptr = hex_byte_pack(ptr, hx);
hx = hex_asc_lo(bcberr >> 8);
- ptr = pack_hex_byte(ptr, hx);
+ ptr = hex_byte_pack(ptr, hx);
hx = hex_asc_hi(bcberr);
- ptr = pack_hex_byte(ptr, hx);
+ ptr = hex_byte_pack(ptr, hx);
hx = hex_asc_lo(bcberr);
- ptr = pack_hex_byte(ptr, hx);
+ ptr = hex_byte_pack(ptr, hx);
ptr = mem2hex(crlf, ptr, sizeof(crlf) - 1, 0);
*ptr = 0;
@@ -1316,12 +1320,12 @@ static int gdbstub(struct pt_regs *regs, enum exception_code excep)
* Send trap type (converted to signal)
*/
*ptr++ = 'T';
- ptr = pack_hex_byte(ptr, sigval);
+ ptr = hex_byte_pack(ptr, sigval);
/*
* Send Error PC
*/
- ptr = pack_hex_byte(ptr, GDB_REGID_PC);
+ ptr = hex_byte_pack(ptr, GDB_REGID_PC);
*ptr++ = ':';
ptr = mem2hex(&regs->pc, ptr, 4, 0);
*ptr++ = ';';
@@ -1329,7 +1333,7 @@ static int gdbstub(struct pt_regs *regs, enum exception_code excep)
/*
* Send frame pointer
*/
- ptr = pack_hex_byte(ptr, GDB_REGID_FP);
+ ptr = hex_byte_pack(ptr, GDB_REGID_FP);
*ptr++ = ':';
ptr = mem2hex(&regs->a3, ptr, 4, 0);
*ptr++ = ';';
@@ -1338,7 +1342,7 @@ static int gdbstub(struct pt_regs *regs, enum exception_code excep)
* Send stack pointer
*/
ssp = (unsigned long) (regs + 1);
- ptr = pack_hex_byte(ptr, GDB_REGID_SP);
+ ptr = hex_byte_pack(ptr, GDB_REGID_SP);
*ptr++ = ':';
ptr = mem2hex(&ssp, ptr, 4, 0);
*ptr++ = ';';
@@ -1547,17 +1551,21 @@ packet_waiting:
* Step to next instruction
*/
case 's':
- /*
- * using the T flag doesn't seem to perform single
+ /* Using the T flag doesn't seem to perform single
* stepping (it seems to wind up being caught by the
* JTAG unit), so we have to use breakpoints and
* continue instead.
*/
+#ifdef CONFIG_GDBSTUB_ALLOW_SINGLE_STEP
if (gdbstub_single_step(regs) < 0)
/* ignore any fault error for now */
gdbstub_printk("unable to set single-step"
" bp\n");
goto done;
+#else
+ gdbstub_strcpy(output_buffer, "E01");
+ break;
+#endif
/*
* Set baud rate (bBB)
@@ -1656,7 +1664,7 @@ done:
* NB: We flush both caches, just to be sure...
*/
if (gdbstub_flush_caches)
- gdbstub_purge_cache();
+ debugger_local_cache_flushinv();
gdbstub_load_fpu();
mn10300_set_gdbleds(0);
@@ -1666,14 +1674,23 @@ done:
touch_softlockup_watchdog();
local_irq_restore(epsw);
- return 1;
+ return 0;
+}
+
+/*
+ * Determine if we hit a debugger special breakpoint that needs skipping over
+ * automatically.
+ */
+int at_debugger_breakpoint(struct pt_regs *regs)
+{
+ return 0;
}
/*
* handle event interception
*/
-asmlinkage int gdbstub_intercept(struct pt_regs *regs,
- enum exception_code excep)
+asmlinkage int debugger_intercept(enum exception_code excep,
+ int signo, int si_code, struct pt_regs *regs)
{
static u8 notfirst = 1;
int ret;
@@ -1687,7 +1704,7 @@ asmlinkage int gdbstub_intercept(struct pt_regs *regs,
asm("mov mdr,%0" : "=d"(mdr));
gdbstub_entry(
- "--> gdbstub_intercept(%p,%04x) [MDR=%lx PC=%lx]\n",
+ "--> debugger_intercept(%p,%04x) [MDR=%lx PC=%lx]\n",
regs, excep, mdr, regs->pc);
gdbstub_entry(
@@ -1721,7 +1738,7 @@ asmlinkage int gdbstub_intercept(struct pt_regs *regs,
ret = gdbstub(regs, excep);
- gdbstub_entry("<-- gdbstub_intercept()\n");
+ gdbstub_entry("<-- debugger_intercept()\n");
gdbstub_busy = 0;
return ret;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-05 03:35:04 +0000