openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

[PATCH] FRV: Introduce asm-offsets for FRV arch 

Introduce the use of asm-offsets into the FRV architecture.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
David Howells 2006-07-10 04:44:55 -07:00 committed by Linus Torvalds
parent 6d8c4e3b01
commit 84e8cd6dbc
13 changed files with 311 additions and 195 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

116
arch/frv/kernel/asm-offsets.c
View File

@ -1 +1,115 @@
/* Dummy asm-offsets.c file. Required by kbuild and ready to be used - hint! */
/*
* Generate definitions needed by assembly language modules.
* This code generates raw asm output which is post-processed
* to extract and format the required data.
*/
#include <linux/sched.h>
#include <linux/signal.h>
#include <linux/personality.h>
#include <asm/registers.h>
#include <asm/ucontext.h>
#include <asm/processor.h>
#include <asm/thread_info.h>
#include <asm/gdb-stub.h>
#define DEFINE(sym, val) \
asm volatile("\n->" #sym " %0 " #val : : "i" (val))
#define DEF_PTREG(sym, reg) \
asm volatile("\n->" #sym " %0 offsetof(struct pt_regs, " #reg ")" \
: : "i" (offsetof(struct pt_regs, reg)))
#define DEF_IREG(sym, reg) \
asm volatile("\n->" #sym " %0 offsetof(struct user_context, " #reg ")" \
: : "i" (offsetof(struct user_context, reg)))
#define DEF_FREG(sym, reg) \
asm volatile("\n->" #sym " %0 offsetof(struct user_context, " #reg ")" \
: : "i" (offsetof(struct user_context, reg)))
#define DEF_0REG(sym, reg) \
asm volatile("\n->" #sym " %0 offsetof(struct frv_frame0, " #reg ")" \
: : "i" (offsetof(struct frv_frame0, reg)))
#define BLANK() asm volatile("\n->" : : )
#define OFFSET(sym, str, mem) \
DEFINE(sym, offsetof(struct str, mem));
void foo(void)
{
/* offsets into the thread_info structure */
OFFSET(TI_TASK, thread_info, task);
OFFSET(TI_EXEC_DOMAIN, thread_info, exec_domain);
OFFSET(TI_FLAGS, thread_info, flags);
OFFSET(TI_STATUS, thread_info, status);
OFFSET(TI_CPU, thread_info, cpu);
OFFSET(TI_PREEMPT_COUNT, thread_info, preempt_count);
OFFSET(TI_ADDR_LIMIT, thread_info, addr_limit);
OFFSET(TI_RESTART_BLOCK, thread_info, restart_block);
BLANK();
/* offsets into register file storage */
DEF_PTREG(REG_PSR, psr);
DEF_PTREG(REG_ISR, isr);
DEF_PTREG(REG_CCR, ccr);
DEF_PTREG(REG_CCCR, cccr);
DEF_PTREG(REG_LR, lr);
DEF_PTREG(REG_LCR, lcr);
DEF_PTREG(REG_PC, pc);
DEF_PTREG(REG__STATUS, __status);
DEF_PTREG(REG_SYSCALLNO, syscallno);
DEF_PTREG(REG_ORIG_GR8, orig_gr8);
DEF_PTREG(REG_GNER0, gner0);
DEF_PTREG(REG_GNER1, gner1);
DEF_PTREG(REG_IACC0, iacc0);
DEF_PTREG(REG_TBR, tbr);
DEF_PTREG(REG_GR0, tbr);
DEFINE(REG__END, sizeof(struct pt_regs));
BLANK();
DEF_0REG(REG_DCR, debug.dcr);
DEF_0REG(REG_IBAR0, debug.ibar[0]);
DEF_0REG(REG_DBAR0, debug.dbar[0]);
DEF_0REG(REG_DBDR00, debug.dbdr[0][0]);
DEF_0REG(REG_DBMR00, debug.dbmr[0][0]);
BLANK();
DEF_IREG(__INT_GR0, i.gr[0]);
DEF_FREG(__USER_FPMEDIA, f);
DEF_FREG(__FPMEDIA_FR0, f.fr[0]);
DEF_FREG(__FPMEDIA_FNER0, f.fner[0]);
DEF_FREG(__FPMEDIA_MSR0, f.msr[0]);
DEF_FREG(__FPMEDIA_ACC0, f.acc[0]);
DEF_FREG(__FPMEDIA_ACCG0, f.accg[0]);
DEF_FREG(__FPMEDIA_FSR0, f.fsr[0]);
BLANK();
DEFINE(NR_PT_REGS, sizeof(struct pt_regs) / 4);
DEFINE(NR_USER_INT_REGS, sizeof(struct user_int_regs) / 4);
DEFINE(NR_USER_FPMEDIA_REGS, sizeof(struct user_fpmedia_regs) / 4);
DEFINE(NR_USER_CONTEXT, sizeof(struct user_context) / 4);
DEFINE(FRV_FRAME0_SIZE, sizeof(struct frv_frame0));
BLANK();
/* offsets into thread_struct */
OFFSET(__THREAD_FRAME, thread_struct, frame);
OFFSET(__THREAD_CURR, thread_struct, curr);
OFFSET(__THREAD_SP, thread_struct, sp);
OFFSET(__THREAD_FP, thread_struct, fp);
OFFSET(__THREAD_LR, thread_struct, lr);
OFFSET(__THREAD_PC, thread_struct, pc);
OFFSET(__THREAD_GR16, thread_struct, gr[0]);
OFFSET(__THREAD_SCHED_LR, thread_struct, sched_lr);
OFFSET(__THREAD_FRAME0, thread_struct, frame0);
OFFSET(__THREAD_USER, thread_struct, user);
BLANK();
/* offsets into frv_debug_status */
OFFSET(DEBUG_BPSR, frv_debug_status, bpsr);
OFFSET(DEBUG_DCR, frv_debug_status, dcr);
OFFSET(DEBUG_BRR, frv_debug_status, brr);
OFFSET(DEBUG_NMAR, frv_debug_status, nmar);
BLANK();
}

34
arch/frv/kernel/break.S
View File

@ -9,11 +9,11 @@
* 2 of the License, or (at your option) any later version.
*/
#include <linux/sys.h>
#include <linux/linkage.h>
#include <asm/setup.h>
#include <asm/segment.h>
#include <asm/ptrace.h>
#include <asm/thread_info.h>
#include <asm/spr-regs.h>
#include <asm/errno.h>
@ -23,13 +23,11 @@
#
.section .bss.stack
.globl __break_user_context
.balign 8192
.balign THREAD_SIZE
__break_stack:
.space (8192 - (USER_CONTEXT_SIZE + REG__DEBUG_XTRA)) & ~7
__break_stack_tos:
.space REG__DEBUG_XTRA
__break_user_context:
.space USER_CONTEXT_SIZE
.space THREAD_SIZE - FRV_FRAME0_SIZE
__break_frame_0:
.space FRV_FRAME0_SIZE
#
# miscellaneous variables
@ -74,8 +72,8 @@ __entry_break:
#endif
LEDS 0x1001,gr31
sethi.p %hi(__break_user_context),gr31
setlo %lo(__break_user_context),gr31
sethi.p %hi(__break_frame_0),gr31
setlo %lo(__break_frame_0),gr31
stdi gr2,@(gr31,#REG_GR(2))
movsg ccr,gr3
@ -585,8 +583,8 @@ __break_continue:
# set up the kernel stack pointer
sti sp,@(gr31,#REG_SP)
sethi.p %hi(__break_stack_tos),sp
setlo %lo(__break_stack_tos),sp
sethi.p %hi(__break_frame_0),sp
setlo %lo(__break_frame_0),sp
# finish building the exception frame
stdi gr4 ,@(gr31,#REG_GR(4))
@ -651,9 +649,12 @@ __break_continue:
movsg nmar,gr5
movsg dcr,gr6
stdi gr4 ,@(gr31,#REG_BRR)
sti gr19,@(gr31,#REG_BPSR)
sti.p gr6 ,@(gr31,#REG_DCR)
sethi.p %hi(__debug_status),gr7
setlo %lo(__debug_status),gr7
stdi gr4 ,@(gr7,#DEBUG_BRR)
sti gr19,@(gr7,#DEBUG_BPSR)
sti.p gr6 ,@(gr7,#DEBUG_DCR)
# trap exceptions during break handling and disable h/w breakpoints/watchpoints
sethi %hi(DCR_EBE),gr5
@ -698,7 +699,10 @@ __break_continue:
lddi @(gr31,#REG_PSR) ,gr22
ldi @(gr31,#REG_PC) ,gr21
ldi @(gr31,#REG_TBR) ,gr20
ldi.p @(gr31,#REG_DCR) ,gr6
sethi.p %hi(__debug_status),gr6
setlo %lo(__debug_status),gr6
ldi.p @(gr6,#DEBUG_DCR) ,gr6
andi gr22,#PSR_S,gr19 /* rebuild BPSR */
andi.p gr22,#PSR_ET,gr5

13
arch/frv/kernel/debug-stub.c
View File

@ -39,10 +39,9 @@ do { \
gdbstub_do_rx(); \
} while(!FLOWCTL_QUERY(LINE))
static void __init debug_stub_init(void);
struct frv_debug_status __debug_status;
extern asmlinkage void __break_hijack_kernel_event(void);
extern asmlinkage void __break_hijack_kernel_event_breaks_here(void);
static void __init debug_stub_init(void);
/*****************************************************************************/
/*
@ -67,7 +66,7 @@ asmlinkage void debug_stub(void)
__set_HSR(0, hsr0 & ~HSR0_ETMD);
/* disable single stepping */
__debug_regs->dcr &= ~DCR_SE;
__debug_status.dcr &= ~DCR_SE;
/* kernel mode can propose an exception be handled in debug mode by jumping to a special
* location */
@ -76,8 +75,8 @@ asmlinkage void debug_stub(void)
* the top kernel context */
*__debug_frame = *__frame;
__frame = __debug_frame->next_frame;
__debug_regs->brr = (__debug_frame->tbr & TBR_TT) << 12;
__debug_regs->brr |= BRR_EB;
__debug_status.brr = (__debug_frame->tbr & TBR_TT) << 12;
__debug_status.brr |= BRR_EB;
}
if (__debug_frame->pc == (unsigned long) __debug_bug_trap + 4) {
@ -124,7 +123,7 @@ static void __init debug_stub_init(void)
__debug_frame->pc = (unsigned long) start_kernel;
/* enable the debug events we want to trap */
__debug_regs->dcr = DCR_EBE;
__debug_status.dcr = DCR_EBE;
#ifdef CONFIG_GDBSTUB
gdbstub_init();

1
arch/frv/kernel/entry.S
View File

@ -27,7 +27,6 @@
*
*/
#include <linux/sys.h>
#include <linux/linkage.h>
#include <asm/thread_info.h>
#include <asm/setup.h>

159
arch/frv/kernel/gdb-stub.c
View File

@ -124,6 +124,7 @@
#include <linux/slab.h>
#include <linux/nmi.h>
#include <asm/asm-offsets.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/gdb-stub.h>
@ -136,7 +137,6 @@ extern void debug_to_serial(const char *p, int n);
extern void gdbstub_console_write(struct console *co, const char *p, unsigned n);
extern volatile uint32_t __break_error_detect[3]; /* ESFR1, ESR15, EAR15 */
extern struct user_context __break_user_context;
struct __debug_amr {
unsigned long L, P;
@ -926,6 +926,7 @@ static int gdbstub_set_breakpoint(unsigned long type, unsigned long addr, unsign
if (!(__debug_regs->dcr & DCR_IBE0)) {
//gdbstub_printk("set h/w break 0: %08lx\n", addr);
__debug_regs->dcr |= DCR_IBE0;
__debug_regs->ibar[0] = addr;
asm volatile("movgs %0,ibar0" : : "r"(addr));
return 0;
}
@ -933,6 +934,7 @@ static int gdbstub_set_breakpoint(unsigned long type, unsigned long addr, unsign
if (!(__debug_regs->dcr & DCR_IBE1)) {
//gdbstub_printk("set h/w break 1: %08lx\n", addr);
__debug_regs->dcr |= DCR_IBE1;
__debug_regs->ibar[1] = addr;
asm volatile("movgs %0,ibar1" : : "r"(addr));
return 0;
}
@ -940,6 +942,7 @@ static int gdbstub_set_breakpoint(unsigned long type, unsigned long addr, unsign
if (!(__debug_regs->dcr & DCR_IBE2)) {
//gdbstub_printk("set h/w break 2: %08lx\n", addr);
__debug_regs->dcr |= DCR_IBE2;
__debug_regs->ibar[2] = addr;
asm volatile("movgs %0,ibar2" : : "r"(addr));
return 0;
}
@ -947,6 +950,7 @@ static int gdbstub_set_breakpoint(unsigned long type, unsigned long addr, unsign
if (!(__debug_regs->dcr & DCR_IBE3)) {
//gdbstub_printk("set h/w break 3: %08lx\n", addr);
__debug_regs->dcr |= DCR_IBE3;
__debug_regs->ibar[3] = addr;
asm volatile("movgs %0,ibar3" : : "r"(addr));
return 0;
}
@ -971,7 +975,14 @@ static int gdbstub_set_breakpoint(unsigned long type, unsigned long addr, unsign
if (!(__debug_regs->dcr & (DCR_DRBE0|DCR_DWBE0))) {
//gdbstub_printk("set h/w watchpoint 0 type %ld: %08lx\n", type, addr);
tmp = type==2 ? DCR_DWBE0 : type==3 ? DCR_DRBE0 : DCR_DRBE0|DCR_DWBE0;
__debug_regs->dcr |= tmp;
__debug_regs->dbar[0] = addr;
__debug_regs->dbmr[0][0] = dbmr.mask0;
__debug_regs->dbmr[0][1] = dbmr.mask1;
__debug_regs->dbdr[0][0] = 0;
__debug_regs->dbdr[0][1] = 0;
asm volatile(" movgs %0,dbar0 \n"
" movgs %1,dbmr00 \n"
" movgs %2,dbmr01 \n"
@ -984,7 +995,14 @@ static int gdbstub_set_breakpoint(unsigned long type, unsigned long addr, unsign
if (!(__debug_regs->dcr & (DCR_DRBE1|DCR_DWBE1))) {
//gdbstub_printk("set h/w watchpoint 1 type %ld: %08lx\n", type, addr);
tmp = type==2 ? DCR_DWBE1 : type==3 ? DCR_DRBE1 : DCR_DRBE1|DCR_DWBE1;
__debug_regs->dcr |= tmp;
__debug_regs->dbar[1] = addr;
__debug_regs->dbmr[1][0] = dbmr.mask0;
__debug_regs->dbmr[1][1] = dbmr.mask1;
__debug_regs->dbdr[1][0] = 0;
__debug_regs->dbdr[1][1] = 0;
asm volatile(" movgs %0,dbar1 \n"
" movgs %1,dbmr10 \n"
" movgs %2,dbmr11 \n"
@ -1047,6 +1065,7 @@ int gdbstub_clear_breakpoint(unsigned long type, unsigned long addr, unsigned lo
if (__debug_regs->dcr & DCR_IBE0 && __get_ibar(0) == addr) {
//gdbstub_printk("clear h/w break 0: %08lx\n", addr);
__debug_regs->dcr &= ~DCR_IBE0;
__debug_regs->ibar[0] = 0;
asm volatile("movgs gr0,ibar0");
return 0;
}
@ -1054,6 +1073,7 @@ int gdbstub_clear_breakpoint(unsigned long type, unsigned long addr, unsigned lo
if (__debug_regs->dcr & DCR_IBE1 && __get_ibar(1) == addr) {
//gdbstub_printk("clear h/w break 1: %08lx\n", addr);
__debug_regs->dcr &= ~DCR_IBE1;
__debug_regs->ibar[1] = 0;
asm volatile("movgs gr0,ibar1");
return 0;
}
@ -1061,6 +1081,7 @@ int gdbstub_clear_breakpoint(unsigned long type, unsigned long addr, unsigned lo
if (__debug_regs->dcr & DCR_IBE2 && __get_ibar(2) == addr) {
//gdbstub_printk("clear h/w break 2: %08lx\n", addr);
__debug_regs->dcr &= ~DCR_IBE2;
__debug_regs->ibar[2] = 0;
asm volatile("movgs gr0,ibar2");
return 0;
}
@ -1068,6 +1089,7 @@ int gdbstub_clear_breakpoint(unsigned long type, unsigned long addr, unsigned lo
if (__debug_regs->dcr & DCR_IBE3 && __get_ibar(3) == addr) {
//gdbstub_printk("clear h/w break 3: %08lx\n", addr);
__debug_regs->dcr &= ~DCR_IBE3;
__debug_regs->ibar[3] = 0;
asm volatile("movgs gr0,ibar3");
return 0;
}
@ -1104,6 +1126,12 @@ int gdbstub_clear_breakpoint(unsigned long type, unsigned long addr, unsigned lo
//gdbstub_printk("clear h/w watchpoint 0 type %ld: %08lx\n", type, addr);
__debug_regs->dcr &= ~(DCR_DRBE0|DCR_DWBE0);
__debug_regs->dbar[0] = 0;
__debug_regs->dbmr[0][0] = 0;
__debug_regs->dbmr[0][1] = 0;
__debug_regs->dbdr[0][0] = 0;
__debug_regs->dbdr[0][1] = 0;
asm volatile(" movgs gr0,dbar0 \n"
" movgs gr0,dbmr00 \n"
" movgs gr0,dbmr01 \n"
@ -1123,6 +1151,12 @@ int gdbstub_clear_breakpoint(unsigned long type, unsigned long addr, unsigned lo
//gdbstub_printk("clear h/w watchpoint 1 type %ld: %08lx\n", type, addr);
__debug_regs->dcr &= ~(DCR_DRBE1|DCR_DWBE1);
__debug_regs->dbar[1] = 0;
__debug_regs->dbmr[1][0] = 0;
__debug_regs->dbmr[1][1] = 0;
__debug_regs->dbdr[1][0] = 0;
__debug_regs->dbdr[1][1] = 0;
asm volatile(" movgs gr0,dbar1 \n"
" movgs gr0,dbmr10 \n"
" movgs gr0,dbmr11 \n"
@ -1163,7 +1197,7 @@ static void gdbstub_check_breakpoint(void)
*/
static void __attribute__((unused)) gdbstub_show_regs(void)
{
uint32_t *reg;
unsigned long *reg;
int loop;
gdbstub_printk("\n");
@ -1172,11 +1206,11 @@ static void __attribute__((unused)) gdbstub_show_regs(void)
__debug_frame,
__debug_frame->psr & PSR_S ? "kernel" : "user");
reg = (uint32_t *) __debug_frame;
for (loop = 0; loop < REG__END; loop++) {
printk("%s %08x", regnames[loop + 0], reg[loop + 0]);
reg = (unsigned long *) __debug_frame;
for (loop = 0; loop < NR_PT_REGS; loop++) {
printk("%s %08lx", regnames[loop + 0], reg[loop + 0]);
if (loop == REG__END - 1 || loop % 5 == 4)
if (loop == NR_PT_REGS - 1 || loop % 5 == 4)
printk("\n");
else
printk(" | ");
@ -1191,13 +1225,8 @@ static void __attribute__((unused)) gdbstub_show_regs(void)
*/
static void __attribute__((unused)) gdbstub_dump_debugregs(void)
{
unsigned long x;
x = __debug_regs->dcr;
gdbstub_printk("DCR %08lx ", x);
x = __debug_regs->brr;
gdbstub_printk("BRR %08lx\n", x);
gdbstub_printk("DCR %08lx ", __debug_status.dcr);
gdbstub_printk("BRR %08lx\n", __debug_status.brr);
gdbstub_printk("IBAR0 %08lx ", __get_ibar(0));
gdbstub_printk("IBAR1 %08lx ", __get_ibar(1));
@ -1360,7 +1389,7 @@ void gdbstub(int sigval)
#endif
}
save_user_regs(&__break_user_context);
save_user_regs(&__debug_frame0->uc);
#if 0
gdbstub_printk("--> gdbstub() %08x %p %08x %08x\n",
@ -1389,8 +1418,8 @@ void gdbstub(int sigval)
__debug_frame->psr &= ~PSR_S;
if (__debug_frame->psr & PSR_PS)
__debug_frame->psr |= PSR_S;
__debug_regs->brr = (__debug_frame->tbr & TBR_TT) << 12;
__debug_regs->brr |= BRR_EB;
__debug_status.brr = (__debug_frame->tbr & TBR_TT) << 12;
__debug_status.brr |= BRR_EB;
sigval = SIGINT;
}
@ -1404,15 +1433,15 @@ void gdbstub(int sigval)
__debug_frame->psr &= ~PSR_S;
if (__debug_frame->psr & PSR_PS)
__debug_frame->psr |= PSR_S;
__debug_regs->brr = (__debug_frame->tbr & TBR_TT) << 12;
__debug_regs->brr |= BRR_EB;
__debug_status.brr = (__debug_frame->tbr & TBR_TT) << 12;
__debug_status.brr |= BRR_EB;
sigval = SIGXCPU;
}
LEDS(0x5002);
/* after a BREAK insn, the PC lands on the far side of it */
if (__debug_regs->brr & BRR_SB)
if (__debug_status.brr & BRR_SB)
gdbstub_check_breakpoint();
LEDS(0x5003);
@ -1431,7 +1460,7 @@ void gdbstub(int sigval)
}
if (!sigval)
sigval = gdbstub_compute_signal(__debug_regs->brr);
sigval = gdbstub_compute_signal(__debug_status.brr);
LEDS(0x5004);
@ -1441,7 +1470,7 @@ void gdbstub(int sigval)
if (sigval != SIGINT && sigval != SIGTRAP && sigval != SIGILL) {
static const char title[] = "Break ";
static const char crlf[] = "\r\n";
unsigned long brr = __debug_regs->brr;
unsigned long brr = __debug_status.brr;
char hx;
ptr = output_buffer;
@ -1565,28 +1594,24 @@ void gdbstub(int sigval)
ptr = mem2hex(&zero, ptr, 4, 0);
for (loop = 1; loop <= 27; loop++)
ptr = mem2hex((unsigned long *)__debug_frame + REG_GR(loop),
ptr, 4, 0);
ptr = mem2hex(&__debug_user_context->i.gr[loop], ptr, 4, 0);
temp = (unsigned long) __frame;
ptr = mem2hex(&temp, ptr, 4, 0);
ptr = mem2hex((unsigned long *)__debug_frame + REG_GR(29), ptr, 4, 0);
ptr = mem2hex((unsigned long *)__debug_frame + REG_GR(30), ptr, 4, 0);
ptr = mem2hex(&__debug_user_context->i.gr[29], ptr, 4, 0);
ptr = mem2hex(&__debug_user_context->i.gr[30], ptr, 4, 0);
#ifdef CONFIG_MMU
ptr = mem2hex((unsigned long *)__debug_frame + REG_GR(31), ptr, 4, 0);
ptr = mem2hex(&__debug_user_context->i.gr[31], ptr, 4, 0);
#else
temp = (unsigned long) __debug_frame;
ptr = mem2hex(&temp, ptr, 4, 0);
#endif
for (loop = 32; loop <= 63; loop++)
ptr = mem2hex((unsigned long *)__debug_frame + REG_GR(loop),
ptr, 4, 0);
ptr = mem2hex(&__debug_user_context->i.gr[loop], ptr, 4, 0);
/* deal with FR0-FR63 */
for (loop = 0; loop <= 63; loop++)
ptr = mem2hex((unsigned long *)&__break_user_context +
__FPMEDIA_FR(loop),
ptr, 4, 0);
ptr = mem2hex(&__debug_user_context->f.fr[loop], ptr, 4, 0);
/* deal with special registers */
ptr = mem2hex(&__debug_frame->pc, ptr, 4, 0);
@ -1597,7 +1622,7 @@ void gdbstub(int sigval)
ptr = mem2hex(&zero, ptr, 4, 0);
ptr = mem2hex(&zero, ptr, 4, 0);
ptr = mem2hex(&__debug_frame->tbr, ptr, 4, 0);
ptr = mem2hex(&__debug_regs->brr , ptr, 4, 0);
ptr = mem2hex(&__debug_status.brr , ptr, 4, 0);
asm volatile("movsg dbar0,%0" : "=r"(dbar));
ptr = mem2hex(&dbar, ptr, 4, 0);
@ -1622,21 +1647,21 @@ void gdbstub(int sigval)
ptr = mem2hex(&__debug_frame->iacc0, ptr, 8, 0);
ptr = mem2hex(&__break_user_context.f.fsr[0], ptr, 4, 0);
ptr = mem2hex(&__debug_user_context->f.fsr[0], ptr, 4, 0);
for (loop = 0; loop <= 7; loop++)
ptr = mem2hex(&__break_user_context.f.acc[loop], ptr, 4, 0);
ptr = mem2hex(&__debug_user_context->f.acc[loop], ptr, 4, 0);
ptr = mem2hex(&__break_user_context.f.accg, ptr, 8, 0);
ptr = mem2hex(&__debug_user_context->f.accg, ptr, 8, 0);
for (loop = 0; loop <= 1; loop++)
ptr = mem2hex(&__break_user_context.f.msr[loop], ptr, 4, 0);
ptr = mem2hex(&__debug_user_context->f.msr[loop], ptr, 4, 0);
ptr = mem2hex(&__debug_frame->gner0, ptr, 4, 0);
ptr = mem2hex(&__debug_frame->gner1, ptr, 4, 0);
ptr = mem2hex(&__break_user_context.f.fner[0], ptr, 4, 0);
ptr = mem2hex(&__break_user_context.f.fner[1], ptr, 4, 0);
ptr = mem2hex(&__debug_user_context->f.fner[0], ptr, 4, 0);
ptr = mem2hex(&__debug_user_context->f.fner[1], ptr, 4, 0);
break;
@ -1648,8 +1673,7 @@ void gdbstub(int sigval)
ptr = hex2mem(ptr, &temp, 4);
for (loop = 1; loop <= 27; loop++)
ptr = hex2mem(ptr, (unsigned long *)__debug_frame + REG_GR(loop),
4);
ptr = hex2mem(ptr, &__debug_user_context->i.gr[loop], 4);
ptr = hex2mem(ptr, &temp, 4);
__frame = (struct pt_regs *) temp;
@ -1662,14 +1686,11 @@ void gdbstub(int sigval)
#endif
for (loop = 32; loop <= 63; loop++)
ptr = hex2mem(ptr, (unsigned long *)__debug_frame + REG_GR(loop),
4);
ptr = hex2mem(ptr, &__debug_user_context->i.gr[loop], 4);
/* deal with FR0-FR63 */
for (loop = 0; loop <= 63; loop++)
ptr = mem2hex((unsigned long *)&__break_user_context +
__FPMEDIA_FR(loop),
ptr, 4, 0);
ptr = mem2hex(&__debug_user_context->f.fr[loop], ptr, 4, 0);
/* deal with special registers */
ptr = hex2mem(ptr, &__debug_frame->pc, 4);
@ -1694,21 +1715,21 @@ void gdbstub(int sigval)
ptr = hex2mem(ptr, &__debug_frame->iacc0, 8);
ptr = hex2mem(ptr, &__break_user_context.f.fsr[0], 4);
ptr = hex2mem(ptr, &__debug_user_context->f.fsr[0], 4);
for (loop = 0; loop <= 7; loop++)
ptr = hex2mem(ptr, &__break_user_context.f.acc[loop], 4);
ptr = hex2mem(ptr, &__debug_user_context->f.acc[loop], 4);
ptr = hex2mem(ptr, &__break_user_context.f.accg, 8);
ptr = hex2mem(ptr, &__debug_user_context->f.accg, 8);
for (loop = 0; loop <= 1; loop++)
ptr = hex2mem(ptr, &__break_user_context.f.msr[loop], 4);
ptr = hex2mem(ptr, &__debug_user_context->f.msr[loop], 4);
ptr = hex2mem(ptr, &__debug_frame->gner0, 4);
ptr = hex2mem(ptr, &__debug_frame->gner1, 4);
ptr = hex2mem(ptr, &__break_user_context.f.fner[0], 4);
ptr = hex2mem(ptr, &__break_user_context.f.fner[1], 4);
ptr = hex2mem(ptr, &__debug_user_context->f.fner[0], 4);
ptr = hex2mem(ptr, &__debug_user_context->f.fner[1], 4);
gdbstub_strcpy(output_buffer,"OK");
break;
@ -1769,52 +1790,52 @@ void gdbstub(int sigval)
case GDB_REG_GR(0):
break;
case GDB_REG_GR(1) ... GDB_REG_GR(63):
__break_user_context.i.gr[addr - GDB_REG_GR(0)] = temp;
__debug_user_context->i.gr[addr - GDB_REG_GR(0)] = temp;
break;
case GDB_REG_FR(0) ... GDB_REG_FR(63):
__break_user_context.f.fr[addr - GDB_REG_FR(0)] = temp;
__debug_user_context->f.fr[addr - GDB_REG_FR(0)] = temp;
break;
case GDB_REG_PC:
__break_user_context.i.pc = temp;
__debug_user_context->i.pc = temp;
break;
case GDB_REG_PSR:
__break_user_context.i.psr = temp;
__debug_user_context->i.psr = temp;
break;
case GDB_REG_CCR:
__break_user_context.i.ccr = temp;
__debug_user_context->i.ccr = temp;
break;
case GDB_REG_CCCR:
__break_user_context.i.cccr = temp;
__debug_user_context->i.cccr = temp;
break;
case GDB_REG_BRR:
__debug_regs->brr = temp;
__debug_status.brr = temp;
break;
case GDB_REG_LR:
__break_user_context.i.lr = temp;
__debug_user_context->i.lr = temp;
break;
case GDB_REG_LCR:
__break_user_context.i.lcr = temp;
__debug_user_context->i.lcr = temp;
break;
case GDB_REG_FSR0:
__break_user_context.f.fsr[0] = temp;
__debug_user_context->f.fsr[0] = temp;
break;
case GDB_REG_ACC(0) ... GDB_REG_ACC(7):
__break_user_context.f.acc[addr - GDB_REG_ACC(0)] = temp;
__debug_user_context->f.acc[addr - GDB_REG_ACC(0)] = temp;
break;
case GDB_REG_ACCG(0):
*(uint32_t *) &__break_user_context.f.accg[0] = temp;
*(uint32_t *) &__debug_user_context->f.accg[0] = temp;
break;
case GDB_REG_ACCG(4):
*(uint32_t *) &__break_user_context.f.accg[4] = temp;
*(uint32_t *) &__debug_user_context->f.accg[4] = temp;
break;
case GDB_REG_MSR(0) ... GDB_REG_MSR(1):
__break_user_context.f.msr[addr - GDB_REG_MSR(0)] = temp;
__debug_user_context->f.msr[addr - GDB_REG_MSR(0)] = temp;
break;
case GDB_REG_GNER(0) ... GDB_REG_GNER(1):
__break_user_context.i.gner[addr - GDB_REG_GNER(0)] = temp;
__debug_user_context->i.gner[addr - GDB_REG_GNER(0)] = temp;
break;
case GDB_REG_FNER(0) ... GDB_REG_FNER(1):
__break_user_context.f.fner[addr - GDB_REG_FNER(0)] = temp;
__debug_user_context->f.fner[addr - GDB_REG_FNER(0)] = temp;
break;
default:
temp2 = 0;
@ -1850,6 +1871,7 @@ void gdbstub(int sigval)
/* step to next instruction */
case 's':
__debug_regs->dcr |= DCR_SE;
__debug_status.dcr |= DCR_SE;
goto done;
/* set baud rate (bBB) */
@ -1934,7 +1956,7 @@ void gdbstub(int sigval)
}
done:
restore_user_regs(&__break_user_context);
restore_user_regs(&__debug_frame0->uc);
//gdbstub_dump_debugregs();
//gdbstub_printk("<-- gdbstub() %08x\n", __debug_frame->pc);
@ -1966,7 +1988,6 @@ void __init gdbstub_init(void)
#endif
gdbstub_printk("%s", gdbstub_banner);
gdbstub_printk("DCR: %x\n", __debug_regs->dcr);
gdbstub_io_init();

1
arch/frv/kernel/head.S
View File

@ -11,6 +11,7 @@
#include <linux/threads.h>
#include <linux/linkage.h>
#include <asm/thread_info.h>
#include <asm/ptrace.h>
#include <asm/page.h>
#include <asm/spr-regs.h>

3
arch/frv/kernel/process.c
View File

@ -26,6 +26,7 @@
#include <linux/reboot.h>
#include <linux/interrupt.h>
#include <asm/asm-offsets.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/setup.h>
@ -207,7 +208,7 @@ int copy_thread(int nr, unsigned long clone_flags,
regs0 = __kernel_frame0_ptr;
childregs0 = (struct pt_regs *)
(task_stack_page(p) + THREAD_SIZE - USER_CONTEXT_SIZE);
(task_stack_page(p) + THREAD_SIZE - FRV_FRAME0_SIZE);
childregs = childregs0;
/* set up the userspace frame (the only place that the USP is stored) */

3
arch/frv/kernel/switch_to.S
View File

@ -11,6 +11,7 @@
# 2 of the License, or (at your option) any later version.
#
###############################################################################
#include <linux/linkage.h>
#include <asm/thread_info.h>
#include <asm/processor.h>
@ -30,7 +31,7 @@
# address of frame 0 (userspace) on current kernel stack
.globl __kernel_frame0_ptr
__kernel_frame0_ptr:
.long init_thread_union + THREAD_SIZE - USER_CONTEXT_SIZE
.long init_thread_union + THREAD_SIZE - FRV_FRAME0_SIZE
# address of current task
.globl __kernel_current_task

25
arch/frv/kernel/traps.c
View File

@ -20,6 +20,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <asm/asm-offsets.h>
#include <asm/setup.h>
#include <asm/fpu.h>
#include <asm/system.h>
@ -279,20 +280,20 @@ static const char *regnames[] = {
void show_regs(struct pt_regs *regs)
{
uint32_t *reg;
unsigned long *reg;
int loop;
printk("\n");
printk("Frame: @%08x [%s]\n",
(uint32_t) regs,
printk("Frame: @%08lx [%s]\n",
(unsigned long) regs,
regs->psr & PSR_S ? "kernel" : "user");
reg = (uint32_t *) regs;
for (loop = 0; loop < REG__END; loop++) {
printk("%s %08x", regnames[loop + 0], reg[loop + 0]);
reg = (unsigned long *) regs;
for (loop = 0; loop < NR_PT_REGS; loop++) {
printk("%s %08lx", regnames[loop + 0], reg[loop + 0]);
if (loop == REG__END - 1 || loop % 5 == 4)
if (loop == NR_PT_REGS - 1 || loop % 5 == 4)
printk("\n");
else
printk(" | ");
@ -328,7 +329,7 @@ void die_if_kernel(const char *str, ...)
*/
static void show_backtrace_regs(struct pt_regs *frame)
{
uint32_t *reg;
unsigned long *reg;
int loop;
/* print the registers for this frame */
@ -336,11 +337,11 @@ static void show_backtrace_regs(struct pt_regs *frame)
frame->psr & PSR_S ? "Kernel Mode" : "User Mode",
frame);
reg = (uint32_t *) frame;
for (loop = 0; loop < REG__END; loop++) {
printk("%s %08x", regnames[loop + 0], reg[loop + 0]);
reg = (unsigned long *) frame;
for (loop = 0; loop < NR_PT_REGS; loop++) {
printk("%s %08lx", regnames[loop + 0], reg[loop + 0]);
if (loop == REG__END - 1 || loop % 5 == 4)
if (loop == NR_PT_REGS - 1 || loop % 5 == 4)
printk("\n");
else
printk(" | ");

22
include/asm-frv/gdb-stub.h
View File

@ -89,6 +89,7 @@ extern void gdbstub_do_rx(void);
extern asmlinkage void __debug_stub_init_break(void);
extern asmlinkage void __break_hijack_kernel_event(void);
extern asmlinkage void __break_hijack_kernel_event_breaks_here(void);
extern asmlinkage void start_kernel(void);
extern asmlinkage void gdbstub_rx_handler(void);
@ -114,5 +115,26 @@ extern void console_set_baud(unsigned baud);
#define gdbstub_proto(FMT,...) ({ 0; })
#endif
/*
* we dedicate GR31 to keeping a pointer to the gdbstub exception frame
* - gr31 is destroyed on entry to the gdbstub if !MMU
* - gr31 is saved in scr3 on entry to the gdbstub if in !MMU
*/
register struct frv_frame0 *__debug_frame0 asm("gr31");
#define __debug_frame (&__debug_frame0->regs)
#define __debug_user_context (&__debug_frame0->uc)
#define __debug_regs (&__debug_frame0->debug)
#define __debug_reg(X) ((unsigned long *) ((unsigned long) &__debug_frame0 + (X)))
struct frv_debug_status {
unsigned long bpsr;
unsigned long dcr;
unsigned long brr;
unsigned long nmar;
};
extern struct frv_debug_status __debug_status;
#endif /* _LANGUAGE_ASSEMBLY */
#endif /* __ASM_GDB_STUB_H */

12
include/asm-frv/ptrace.h
View File

@ -62,18 +62,10 @@
#ifndef __ASSEMBLY__
/*
* dedicate GR28; to keeping the a pointer to the current exception frame
* we dedicate GR28 to keeping a pointer to the current exception frame
* - gr28 is destroyed on entry to the kernel from userspace
*/
register struct pt_regs *__frame asm("gr28");
register struct pt_regs *__debug_frame asm("gr31");
#ifndef container_of
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
#endif
#define __debug_regs container_of(__debug_frame, struct pt_debug_regs, normal_regs)
#define user_mode(regs) (!((regs)->psr & PSR_S))
#define instruction_pointer(regs) ((regs)->pc)

93
include/asm-frv/registers.h
View File

@ -23,7 +23,13 @@
*
* +0x2000 +----------------------
* | union {
* | struct user_context
* | struct frv_frame0 {
* | struct user_context {
* | struct user_int_regs
* | struct user_fpmedia_regs
* | }
* | struct frv_debug_regs
* | }
* | struct pt_regs [user exception]
* | }
* +---------------------- <-- __kernel_frame0_ptr (maybe GR28)
@ -51,11 +57,11 @@
#define _ASM_REGISTERS_H
#ifndef __ASSEMBLY__
#define __OFFSET(X) (X)
#define __OFFSET(X,N) ((X)+(N)*4)
#define __OFFSETC(X,N) xxxxxxxxxxxxxxxxxxxxxxxx
#else
#define __OFFSET(X) ((X)*4)
#define __OFFSETC(X,N) ((X)*4+(N))
#define __OFFSET(X,N) ((X)+(N)*4)
#define __OFFSETC(X,N) ((X)+(N))
#endif
/*****************************************************************************/
@ -117,30 +123,13 @@ struct pt_regs {
#endif
#define REG_PSR __OFFSET( 0) /* Processor Status Register */
#define REG_ISR __OFFSET( 1) /* Integer Status Register */
#define REG_CCR __OFFSET( 2) /* Condition Code Register */
#define REG_CCCR __OFFSET( 3) /* Condition Code for Conditional Insns Register */
#define REG_LR __OFFSET( 4) /* Link Register */
#define REG_LCR __OFFSET( 5) /* Loop Count Register */
#define REG_PC __OFFSET( 6) /* Program Counter */
#define REG__STATUS __OFFSET( 7) /* exception status */
#define REG__STATUS_STEP 0x00000001 /* - reenable single stepping on return */
#define REG__STATUS_STEPPED 0x00000002 /* - single step caused exception */
#define REG__STATUS_BROKE 0x00000004 /* - BREAK insn caused exception */
#define REG__STATUS_SYSC_ENTRY 0x40000000 /* - T on syscall entry (ptrace.c only) */
#define REG__STATUS_SYSC_EXIT 0x80000000 /* - T on syscall exit (ptrace.c only) */
#define REG_SYSCALLNO __OFFSET( 8) /* syscall number or -1 */
#define REG_ORIG_GR8 __OFFSET( 9) /* saved GR8 for signal handling */
#define REG_GNER0 __OFFSET(10)
#define REG_GNER1 __OFFSET(11)
#define REG_IACC0 __OFFSET(12)
#define REG_TBR __OFFSET(14) /* Trap Vector Register */
#define REG_GR(R) __OFFSET((14+(R)))
#define REG__END REG_GR(32)
#define REG_GR(R) __OFFSET(REG_GR0, (R))
#define REG_SP REG_GR(1)
#define REG_FP REG_GR(2)
@ -149,27 +138,21 @@ struct pt_regs {
/*****************************************************************************/
/*
* extension tacked in front of the exception frame in debug mode
* debugging registers
*/
#ifndef __ASSEMBLY__
struct pt_debug_regs
struct frv_debug_regs
{
unsigned long bpsr;
unsigned long dcr;
unsigned long brr;
unsigned long nmar;
struct pt_regs normal_regs;
unsigned long ibar[4] __attribute__((aligned(8)));
unsigned long dbar[4] __attribute__((aligned(8)));
unsigned long dbdr[4][4] __attribute__((aligned(8)));
unsigned long dbmr[4][4] __attribute__((aligned(8)));
} __attribute__((aligned(8)));
#endif
#define REG_NMAR __OFFSET(-1)
#define REG_BRR __OFFSET(-2)
#define REG_DCR __OFFSET(-3)
#define REG_BPSR __OFFSET(-4)
#define REG__DEBUG_XTRA __OFFSET(4)
/*****************************************************************************/
/*
* userspace registers
@ -223,33 +206,27 @@ struct user_context
void *extension;
} __attribute__((aligned(8)));
struct frv_frame0 {
union {
struct pt_regs regs;
struct user_context uc;
};
struct frv_debug_regs debug;
} __attribute__((aligned(32)));
#endif
#define NR_USER_INT_REGS (14 + 64)
#define NR_USER_FPMEDIA_REGS (64 + 2 + 2 + 8 + 8/4 + 1)
#define NR_USER_CONTEXT (NR_USER_INT_REGS + NR_USER_FPMEDIA_REGS + 1)
#define __INT_GR(R) __OFFSET(__INT_GR0, (R))
#define USER_CONTEXT_SIZE (((NR_USER_CONTEXT + 1) & ~1) * 4)
#define __FPMEDIA_FR(R) __OFFSET(__FPMEDIA_FR0, (R))
#define __FPMEDIA_FNER(R) __OFFSET(__FPMEDIA_FNER0, (R))
#define __FPMEDIA_MSR(R) __OFFSET(__FPMEDIA_MSR0, (R))
#define __FPMEDIA_ACC(R) __OFFSET(__FPMEDIA_ACC0, (R))
#define __FPMEDIA_ACCG(R) __OFFSETC(__FPMEDIA_ACCG0, (R))
#define __FPMEDIA_FSR(R) __OFFSET(__FPMEDIA_FSR0, (R))
#define __THREAD_FRAME __OFFSET(0)
#define __THREAD_CURR __OFFSET(1)
#define __THREAD_SP __OFFSET(2)
#define __THREAD_FP __OFFSET(3)
#define __THREAD_LR __OFFSET(4)
#define __THREAD_PC __OFFSET(5)
#define __THREAD_GR(R) __OFFSET(6 + (R) - 16)
#define __THREAD_FRAME0 __OFFSET(19)
#define __THREAD_USER __OFFSET(19)
#define __USER_INT __OFFSET(0)
#define __INT_GR(R) __OFFSET(14 + (R))
#define __USER_FPMEDIA __OFFSET(NR_USER_INT_REGS)
#define __FPMEDIA_FR(R) __OFFSET(NR_USER_INT_REGS + (R))
#define __FPMEDIA_FNER(R) __OFFSET(NR_USER_INT_REGS + 64 + (R))
#define __FPMEDIA_MSR(R) __OFFSET(NR_USER_INT_REGS + 66 + (R))
#define __FPMEDIA_ACC(R) __OFFSET(NR_USER_INT_REGS + 68 + (R))
#define __FPMEDIA_ACCG(R) __OFFSETC(NR_USER_INT_REGS + 76, (R))
#define __FPMEDIA_FSR(R) __OFFSET(NR_USER_INT_REGS + 78 + (R))
#define __THREAD_GR(R) __OFFSET(__THREAD_GR16, (R) - 16)
#endif /* _ASM_REGISTERS_H */

24
include/asm-frv/thread_info.h
View File

@ -19,6 +19,8 @@
#include <asm/processor.h>
#endif
#define THREAD_SIZE 8192
/*
* low level task data that entry.S needs immediate access to
* - this struct should fit entirely inside of one cache line
@ -46,15 +48,7 @@ struct thread_info {
#else /* !__ASSEMBLY__ */
/* offsets into the thread_info struct for assembly code access */
#define TI_TASK 0x00000000
#define TI_EXEC_DOMAIN 0x00000004
#define TI_FLAGS 0x00000008
#define TI_STATUS 0x0000000C
#define TI_CPU 0x00000010
#define TI_PRE_COUNT 0x00000014
#define TI_ADDR_LIMIT 0x00000018
#define TI_RESTART_BLOCK 0x0000001C
#include <asm/asm-offsets.h>
#endif
@ -83,12 +77,6 @@ struct thread_info {
#define init_thread_info (init_thread_union.thread_info)
#define init_stack (init_thread_union.stack)
#ifdef CONFIG_SMALL_TASKS
#define THREAD_SIZE 4096
#else
#define THREAD_SIZE 8192
#endif
/* how to get the thread information struct from C */
register struct thread_info *__current_thread_info asm("gr15");
@ -111,11 +99,7 @@ register struct thread_info *__current_thread_info asm("gr15");
#define free_thread_info(info) kfree(info)
#else /* !__ASSEMBLY__ */
#define THREAD_SIZE 8192
#endif
#endif /* __ASSEMBLY__ */
/*
* thread information flags