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[PATCH v8 28/29] accel/tcg/user-exec: Implement CPU-specific signal hand
From: |
Song Gao |
Subject: |
[PATCH v8 28/29] accel/tcg/user-exec: Implement CPU-specific signal handler for loongarch64 hosts |
Date: |
Mon, 1 Nov 2021 17:51:50 +0800 |
Base-on: <20210925173032.2434906-30-git@xen0n.name>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
---
accel/tcg/user-exec.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 61 insertions(+), 3 deletions(-)
diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c
index 7604b0a..ec887c4 100644
--- a/accel/tcg/user-exec.c
+++ b/accel/tcg/user-exec.c
@@ -811,10 +811,68 @@ int cpu_signal_handler(int host_signum, void *pinfo,
siginfo_t *info = pinfo;
ucontext_t *uc = puc;
greg_t pc = uc->uc_mcontext.__pc;
- int is_write;
+ uint32_t insn = *(uint32_t *)pc;
+ int is_write = 0;
+
+ /* Detect store by reading the instruction at the program counter. */
+ switch ((insn >> 26) & 0b111111) {
+ case 0b001000: /* {ll,sc}.[wd] */
+ switch ((insn >> 24) & 0b11) {
+ case 0b01: /* sc.w */
+ case 0b11: /* sc.d */
+ is_write = 1;
+ break;
+ }
+ break;
+ case 0b001001: /* {ld,st}ox4.[wd] ({ld,st}ptr.[wd]) */
+ switch ((insn >> 24) & 0b11) {
+ case 0b01: /* stox4.w (stptr.w) */
+ case 0b11: /* stox4.d (stptr.d) */
+ is_write = 1;
+ break;
+ }
+ break;
+ case 0b001010: /* {ld,st}.* family */
+ switch ((insn >> 22) & 0b1111) {
+ case 0b0100: /* st.b */
+ case 0b0101: /* st.h */
+ case 0b0110: /* st.w */
+ case 0b0111: /* st.d */
+ case 0b1101: /* fst.s */
+ case 0b1111: /* fst.d */
+ is_write = 1;
+ break;
+ }
+ break;
+ case 0b001110: /* indexed, atomic, bounds-checking memory operations */
+ uint32_t sel = (insn >> 15) & 0b11111111111;
+
+ switch (sel) {
+ case 0b00000100000: /* stx.b */
+ case 0b00000101000: /* stx.h */
+ case 0b00000110000: /* stx.w */
+ case 0b00000111000: /* stx.d */
+ case 0b00001110000: /* fstx.s */
+ case 0b00001111000: /* fstx.d */
+ case 0b00011101100: /* fstgt.s */
+ case 0b00011101101: /* fstgt.d */
+ case 0b00011101110: /* fstle.s */
+ case 0b00011101111: /* fstle.d */
+ case 0b00011111000: /* stgt.b */
+ case 0b00011111001: /* stgt.h */
+ case 0b00011111010: /* stgt.w */
+ case 0b00011111011: /* stgt.d */
+ case 0b00011111100: /* stle.b */
+ case 0b00011111101: /* stle.h */
+ case 0b00011111110: /* stle.w */
+ case 0b00011111111: /* stle.d */
+ case 0b00011000000 ... 0b00011100011: /* am* insns */
+ is_write = 1;
+ break;
+ }
+ break;
+ }
- /* XXX: compute is_write */
- is_write = 0;
return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask);
}
--
1.8.3.1
- [PATCH v8 29/29] linux-user: Add safe syscall handling for loongarch64 hosts, (continued)
- [PATCH v8 29/29] linux-user: Add safe syscall handling for loongarch64 hosts, Song Gao, 2021/11/01
- [PATCH v8 15/29] target/loongarch: Add branch instruction translation, Song Gao, 2021/11/01
- [PATCH v8 20/29] linux-user: Add LoongArch elf support, Song Gao, 2021/11/01
- [PATCH v8 26/29] target/loongarch: 'make check-tcg' support, Song Gao, 2021/11/01
- [PATCH v8 13/29] target/loongarch: Add floating point move instruction translation, Song Gao, 2021/11/01
- [PATCH v8 18/29] linux-user: Add LoongArch specific structures, Song Gao, 2021/11/01
- [PATCH v8 16/29] target/loongarch: Add disassembler, Song Gao, 2021/11/01
- [PATCH v8 19/29] linux-user: Add LoongArch signal support, Song Gao, 2021/11/01
- [PATCH v8 22/29] linux-user: Add LoongArch cpu_loop support, Song Gao, 2021/11/01
- [PATCH v8 28/29] accel/tcg/user-exec: Implement CPU-specific signal handler for loongarch64 hosts,
Song Gao <=
- [PATCH v8 21/29] linux-user: Add LoongArch syscall support, Song Gao, 2021/11/01
- [PATCH v8 25/29] target/loongarch: Add target build suport, Song Gao, 2021/11/01
- [PATCH v8 27/29] scripts: add loongarch64 binfmt config, Song Gao, 2021/11/01
- [PATCH v8 23/29] linux-user: Add host dependency for LoongArch 64-bit, Song Gao, 2021/11/01
- Re: [PATCH v8 00/29] Add LoongArch linux-user emulation support, Philippe Mathieu-Daudé, 2021/11/02