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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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5afe27380b
Record one more level of stack frame program counter. Particularly when lockdep and all sorts of spinlock debugging is enabled, figuring out the caller of spin_lock() is difficult when the cpu is stuck on the lock. Signed-off-by: David S. Miller <davem@davemloft.net>
348 lines
8.1 KiB
C
348 lines
8.1 KiB
C
#ifndef _SPARC64_PTRACE_H
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#define _SPARC64_PTRACE_H
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#include <asm/pstate.h>
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/* This struct defines the way the registers are stored on the
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* stack during a system call and basically all traps.
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*/
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/* This magic value must have the low 9 bits clear,
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* as that is where we encode the %tt value, see below.
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*/
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#define PT_REGS_MAGIC 0x57ac6c00
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#ifndef __ASSEMBLY__
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#include <linux/types.h>
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struct pt_regs {
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unsigned long u_regs[16]; /* globals and ins */
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unsigned long tstate;
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unsigned long tpc;
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unsigned long tnpc;
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unsigned int y;
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/* We encode a magic number, PT_REGS_MAGIC, along
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* with the %tt (trap type) register value at trap
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* entry time. The magic number allows us to identify
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* accurately a trap stack frame in the stack
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* unwinder, and the %tt value allows us to test
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* things like "in a system call" etc. for an arbitray
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* process.
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*
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* The PT_REGS_MAGIC is choosen such that it can be
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* loaded completely using just a sethi instruction.
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*/
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unsigned int magic;
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};
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static inline int pt_regs_trap_type(struct pt_regs *regs)
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{
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return regs->magic & 0x1ff;
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}
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static inline bool pt_regs_is_syscall(struct pt_regs *regs)
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{
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return (regs->tstate & TSTATE_SYSCALL);
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}
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static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
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{
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return (regs->tstate &= ~TSTATE_SYSCALL);
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}
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struct pt_regs32 {
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unsigned int psr;
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unsigned int pc;
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unsigned int npc;
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unsigned int y;
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unsigned int u_regs[16]; /* globals and ins */
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};
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#define UREG_G0 0
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#define UREG_G1 1
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#define UREG_G2 2
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#define UREG_G3 3
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#define UREG_G4 4
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#define UREG_G5 5
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#define UREG_G6 6
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#define UREG_G7 7
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#define UREG_I0 8
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#define UREG_I1 9
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#define UREG_I2 10
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#define UREG_I3 11
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#define UREG_I4 12
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#define UREG_I5 13
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#define UREG_I6 14
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#define UREG_I7 15
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#define UREG_FP UREG_I6
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#define UREG_RETPC UREG_I7
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/* A V9 register window */
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struct reg_window {
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unsigned long locals[8];
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unsigned long ins[8];
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};
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/* A 32-bit register window. */
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struct reg_window32 {
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unsigned int locals[8];
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unsigned int ins[8];
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};
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/* A V9 Sparc stack frame */
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struct sparc_stackf {
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unsigned long locals[8];
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unsigned long ins[6];
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struct sparc_stackf *fp;
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unsigned long callers_pc;
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char *structptr;
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unsigned long xargs[6];
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unsigned long xxargs[1];
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};
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/* A 32-bit Sparc stack frame */
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struct sparc_stackf32 {
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unsigned int locals[8];
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unsigned int ins[6];
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unsigned int fp;
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unsigned int callers_pc;
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unsigned int structptr;
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unsigned int xargs[6];
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unsigned int xxargs[1];
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};
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struct sparc_trapf {
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unsigned long locals[8];
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unsigned long ins[8];
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unsigned long _unused;
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struct pt_regs *regs;
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};
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#define TRACEREG_SZ sizeof(struct pt_regs)
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#define STACKFRAME_SZ sizeof(struct sparc_stackf)
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#define TRACEREG32_SZ sizeof(struct pt_regs32)
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#define STACKFRAME32_SZ sizeof(struct sparc_stackf32)
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#ifdef __KERNEL__
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struct global_reg_snapshot {
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unsigned long tstate;
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unsigned long tpc;
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unsigned long tnpc;
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unsigned long o7;
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unsigned long i7;
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unsigned long rpc;
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struct thread_info *thread;
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unsigned long pad1;
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};
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#define __ARCH_WANT_COMPAT_SYS_PTRACE
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#define force_successful_syscall_return() \
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do { current_thread_info()->syscall_noerror = 1; \
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} while (0)
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#define user_mode(regs) (!((regs)->tstate & TSTATE_PRIV))
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#define instruction_pointer(regs) ((regs)->tpc)
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#define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
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#define regs_return_value(regs) ((regs)->u_regs[UREG_I0])
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#ifdef CONFIG_SMP
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extern unsigned long profile_pc(struct pt_regs *);
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#else
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#define profile_pc(regs) instruction_pointer(regs)
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#endif
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extern void show_regs(struct pt_regs *);
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extern void __show_regs(struct pt_regs *);
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#endif
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#else /* __ASSEMBLY__ */
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/* For assembly code. */
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#define TRACEREG_SZ 0xa0
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#define STACKFRAME_SZ 0xc0
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#define TRACEREG32_SZ 0x50
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#define STACKFRAME32_SZ 0x60
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#endif
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#ifdef __KERNEL__
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#define STACK_BIAS 2047
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#endif
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/* These are for pt_regs. */
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#define PT_V9_G0 0x00
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#define PT_V9_G1 0x08
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#define PT_V9_G2 0x10
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#define PT_V9_G3 0x18
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#define PT_V9_G4 0x20
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#define PT_V9_G5 0x28
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#define PT_V9_G6 0x30
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#define PT_V9_G7 0x38
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#define PT_V9_I0 0x40
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#define PT_V9_I1 0x48
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#define PT_V9_I2 0x50
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#define PT_V9_I3 0x58
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#define PT_V9_I4 0x60
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#define PT_V9_I5 0x68
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#define PT_V9_I6 0x70
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#define PT_V9_FP PT_V9_I6
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#define PT_V9_I7 0x78
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#define PT_V9_TSTATE 0x80
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#define PT_V9_TPC 0x88
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#define PT_V9_TNPC 0x90
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#define PT_V9_Y 0x98
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#define PT_V9_MAGIC 0x9c
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#define PT_TSTATE PT_V9_TSTATE
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#define PT_TPC PT_V9_TPC
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#define PT_TNPC PT_V9_TNPC
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/* These for pt_regs32. */
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#define PT_PSR 0x0
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#define PT_PC 0x4
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#define PT_NPC 0x8
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#define PT_Y 0xc
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#define PT_G0 0x10
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#define PT_WIM PT_G0
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#define PT_G1 0x14
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#define PT_G2 0x18
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#define PT_G3 0x1c
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#define PT_G4 0x20
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#define PT_G5 0x24
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#define PT_G6 0x28
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#define PT_G7 0x2c
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#define PT_I0 0x30
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#define PT_I1 0x34
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#define PT_I2 0x38
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#define PT_I3 0x3c
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#define PT_I4 0x40
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#define PT_I5 0x44
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#define PT_I6 0x48
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#define PT_FP PT_I6
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#define PT_I7 0x4c
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/* Reg_window offsets */
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#define RW_V9_L0 0x00
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#define RW_V9_L1 0x08
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#define RW_V9_L2 0x10
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#define RW_V9_L3 0x18
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#define RW_V9_L4 0x20
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#define RW_V9_L5 0x28
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#define RW_V9_L6 0x30
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#define RW_V9_L7 0x38
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#define RW_V9_I0 0x40
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#define RW_V9_I1 0x48
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#define RW_V9_I2 0x50
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#define RW_V9_I3 0x58
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#define RW_V9_I4 0x60
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#define RW_V9_I5 0x68
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#define RW_V9_I6 0x70
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#define RW_V9_I7 0x78
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#define RW_L0 0x00
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#define RW_L1 0x04
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#define RW_L2 0x08
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#define RW_L3 0x0c
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#define RW_L4 0x10
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#define RW_L5 0x14
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#define RW_L6 0x18
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#define RW_L7 0x1c
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#define RW_I0 0x20
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#define RW_I1 0x24
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#define RW_I2 0x28
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#define RW_I3 0x2c
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#define RW_I4 0x30
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#define RW_I5 0x34
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#define RW_I6 0x38
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#define RW_I7 0x3c
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/* Stack_frame offsets */
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#define SF_V9_L0 0x00
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#define SF_V9_L1 0x08
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#define SF_V9_L2 0x10
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#define SF_V9_L3 0x18
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#define SF_V9_L4 0x20
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#define SF_V9_L5 0x28
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#define SF_V9_L6 0x30
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#define SF_V9_L7 0x38
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#define SF_V9_I0 0x40
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#define SF_V9_I1 0x48
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#define SF_V9_I2 0x50
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#define SF_V9_I3 0x58
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#define SF_V9_I4 0x60
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#define SF_V9_I5 0x68
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#define SF_V9_FP 0x70
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#define SF_V9_PC 0x78
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#define SF_V9_RETP 0x80
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#define SF_V9_XARG0 0x88
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#define SF_V9_XARG1 0x90
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#define SF_V9_XARG2 0x98
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#define SF_V9_XARG3 0xa0
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#define SF_V9_XARG4 0xa8
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#define SF_V9_XARG5 0xb0
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#define SF_V9_XXARG 0xb8
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#define SF_L0 0x00
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#define SF_L1 0x04
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#define SF_L2 0x08
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#define SF_L3 0x0c
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#define SF_L4 0x10
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#define SF_L5 0x14
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#define SF_L6 0x18
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#define SF_L7 0x1c
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#define SF_I0 0x20
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#define SF_I1 0x24
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#define SF_I2 0x28
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#define SF_I3 0x2c
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#define SF_I4 0x30
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#define SF_I5 0x34
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#define SF_FP 0x38
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#define SF_PC 0x3c
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#define SF_RETP 0x40
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#define SF_XARG0 0x44
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#define SF_XARG1 0x48
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#define SF_XARG2 0x4c
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#define SF_XARG3 0x50
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#define SF_XARG4 0x54
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#define SF_XARG5 0x58
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#define SF_XXARG 0x5c
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#ifdef __KERNEL__
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/* global_reg_snapshot offsets */
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#define GR_SNAP_TSTATE 0x00
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#define GR_SNAP_TPC 0x08
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#define GR_SNAP_TNPC 0x10
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#define GR_SNAP_O7 0x18
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#define GR_SNAP_I7 0x20
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#define GR_SNAP_RPC 0x28
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#define GR_SNAP_THREAD 0x30
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#define GR_SNAP_PAD1 0x38
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#endif /* __KERNEL__ */
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/* Stuff for the ptrace system call */
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#define PTRACE_SPARC_DETACH 11
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#define PTRACE_GETREGS 12
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#define PTRACE_SETREGS 13
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#define PTRACE_GETFPREGS 14
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#define PTRACE_SETFPREGS 15
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#define PTRACE_READDATA 16
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#define PTRACE_WRITEDATA 17
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#define PTRACE_READTEXT 18
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#define PTRACE_WRITETEXT 19
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#define PTRACE_GETFPAREGS 20
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#define PTRACE_SETFPAREGS 21
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/* There are for debugging 64-bit processes, either from a 32 or 64 bit
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* parent. Thus their complements are for debugging 32-bit processes only.
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*/
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#define PTRACE_GETREGS64 22
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#define PTRACE_SETREGS64 23
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/* PTRACE_SYSCALL is 24 */
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#define PTRACE_GETFPREGS64 25
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#define PTRACE_SETFPREGS64 26
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#endif /* !(_SPARC64_PTRACE_H) */
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