提交 7777746c 编写于 作者: R Richard Kuo

Hexagon: add support for single-stepping (v4+)

Hardware single-step is only available on v4 and later
architectures.
Signed-off-by: NRichard Kuo <rkuo@codeaurora.org>
上级 f8722a4d
master alk-4.19.24 alk-4.19.30 alk-4.19.34 alk-4.19.36 alk-4.19.43 alk-4.19.48 alk-4.19.57 ck-4.19.67 ck-4.19.81 ck-4.19.91 github/fork/deepanshu1422/fix-typo-in-comment github/fork/haosdent/fix-typo linux-next v4.19.91 v4.19.90 v4.19.89 v4.19.88 v4.19.87 v4.19.86 v4.19.85 v4.19.84 v4.19.83 v4.19.82 v4.19.81 v4.19.80 v4.19.79 v4.19.78 v4.19.77 v4.19.76 v4.19.75 v4.19.74 v4.19.73 v4.19.72 v4.19.71 v4.19.70 v4.19.69 v4.19.68 v4.19.67 v4.19.66 v4.19.65 v4.19.64 v4.19.63 v4.19.62 v4.19.61 v4.19.60 v4.19.59 v4.19.58 v4.19.57 v4.19.56 v4.19.55 v4.19.54 v4.19.53 v4.19.52 v4.19.51 v4.19.50 v4.19.49 v4.19.48 v4.19.47 v4.19.46 v4.19.45 v4.19.44 v4.19.43 v4.19.42 v4.19.41 v4.19.40 v4.19.39 v4.19.38 v4.19.37 v4.19.36 v4.19.35 v4.19.34 v4.19.33 v4.19.32 v4.19.31 v4.19.30 v4.19.29 v4.19.28 v4.19.27 v4.19.26 v4.19.25 v4.19.24 v4.19.23 v4.19.22 v4.19.21 v4.19.20 v4.19.19 v4.19.18 v4.19.17 v4.19.16 v4.19.15 v4.19.14 v4.19.13 v4.19.12 v4.19.11 v4.19.10 v4.19.9 v4.19.8 v4.19.7 v4.19.6 v4.19.5 v4.19.4 v4.19.3 v4.19.2 v4.19.1 v4.19 v4.19-rc8 v4.19-rc7 v4.19-rc6 v4.19-rc5 v4.19-rc4 v4.19-rc3 v4.19-rc2 v4.19-rc1 ck-release-21 ck-release-20 ck-release-19.2 ck-release-19.1 ck-release-19 ck-release-18 ck-release-17.2 ck-release-17.1 ck-release-17 ck-release-16 ck-release-15.1 ck-release-15 ck-release-14 ck-release-13.2 ck-release-13 ck-release-12 ck-release-11 ck-release-10 ck-release-9 ck-release-7 alk-release-15 alk-release-14 alk-release-13.2 alk-release-13 alk-release-12 alk-release-11 alk-release-10 alk-release-9 alk-release-7
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......@@ -36,4 +36,9 @@ extern const char *regs_query_register_name(unsigned int offset);
((struct pt_regs *) \
((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
#if CONFIG_HEXAGON_ARCH_VERSION >= 4
#define arch_has_single_step() (1)
#endif
#endif
......@@ -211,6 +211,9 @@ struct pt_regs {
#define pt_psp(regs) ((regs)->hvmer.vmpsp)
#define pt_badva(regs) ((regs)->hvmer.vmbadva)
#define pt_set_singlestep(regs) ((regs)->hvmer.vmest |= (1<<HVM_VMEST_SS_SFT))
#define pt_clr_singlestep(regs) ((regs)->hvmer.vmest &= ~(1<<HVM_VMEST_SS_SFT))
#define pt_set_rte_sp(regs, sp) do {\
pt_psp(regs) = (sp);\
(regs)->SP = (unsigned long) &((regs)->hvmer);\
......
......@@ -32,6 +32,21 @@
#include <asm/user.h>
#if arch_has_single_step()
/* Both called from ptrace_resume */
void user_enable_single_step(struct task_struct *child)
{
pt_set_singlestep(task_pt_regs(child));
set_tsk_thread_flag(child, TIF_SINGLESTEP);
}
void user_disable_single_step(struct task_struct *child)
{
pt_clr_singlestep(task_pt_regs(child));
clear_tsk_thread_flag(child, TIF_SINGLESTEP);
}
#endif
static int genregs_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
......
......@@ -451,3 +451,14 @@ void do_machcheck(struct pt_regs *regs)
/* Halt and catch fire */
__vmstop();
}
/*
* Treat this like the old 0xdb trap.
*/
void do_debug_exception(struct pt_regs *regs)
{
regs->hvmer.vmest &= ~HVM_VMEST_CAUSE_MSK;
regs->hvmer.vmest |= (TRAP_DEBUG << HVM_VMEST_CAUSE_SFT);
do_trap0(regs);
}
......@@ -367,6 +367,9 @@ _K_enter_trap0:
_K_enter_machcheck:
vm_event_entry(do_machcheck)
.globl _K_enter_debug
_K_enter_debug:
vm_event_entry(do_debug_exception)
.globl ret_from_fork
ret_from_fork:
......
......@@ -41,7 +41,7 @@ _K_VM_event_vector:
jump 1b; /* Reset */
jump _K_enter_machcheck;
jump _K_enter_genex;
jump 1b; /* 3 Rsvd */
jump _K_enter_debug;
jump 1b; /* 4 Rsvd */
jump _K_enter_trap0;
jump 1b; /* 6 Rsvd */
......
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