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[rv]信号处理进入用户态前恢复gp (#9072) 

* [rv/virt/stackframe.h]添加GP寄存器保存偏移量宏

* 【rv/c906/stackframe.h]定义GP寄存器存储偏移量

* [rv]信号处理切换到用户态前恢复gp
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heyuanjie87 2024-06-21 09:09:41 +08:00 committed by GitHub
parent af5bd68c58
commit 06ad67d549
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3 changed files with 5 additions and 0 deletions
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3
components/lwp/arch/risc-v/rv64/lwp_gcc.S
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@ -174,6 +174,9 @@ arch_thread_signal_enter:
/* dummy a2 */ /* dummy a2 */
mv a2, a1 mv a2, a1
/* restore user GP */
LOAD gp, FRAME_OFF_GP(s3)
/** /**
* handler(signo, psi, ucontext); * handler(signo, psi, ucontext);
*/ */

1
libcpu/risc-v/t-head/c906/stackframe.h
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@ -16,6 +16,7 @@
#define BYTES(idx) ((idx) * REGBYTES) #define BYTES(idx) ((idx) * REGBYTES)
#define FRAME_OFF_SSTATUS BYTES(2) #define FRAME_OFF_SSTATUS BYTES(2)
#define FRAME_OFF_SP BYTES(32) #define FRAME_OFF_SP BYTES(32)
#define FRAME_OFF_GP BYTES(3)
#include "cpuport.h" #include "cpuport.h"
#include "encoding.h" #include "encoding.h"

1
libcpu/risc-v/virt64/stackframe.h
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@ -21,6 +21,7 @@
#define BYTES(idx) ((idx) * REGBYTES) #define BYTES(idx) ((idx) * REGBYTES)
#define FRAME_OFF_SSTATUS BYTES(2) #define FRAME_OFF_SSTATUS BYTES(2)
#define FRAME_OFF_SP BYTES(32) #define FRAME_OFF_SP BYTES(32)
#define FRAME_OFF_GP BYTES(3)
#ifdef __ASSEMBLY__ #ifdef __ASSEMBLY__