| Message ID | 20210409104814.28750-1-xypron.glpk@gmx.de |
|---|---|
| State | Accepted |
| Commit | 91e4b7516d84cefab7324765b3c8d6a909185ce2 |
| Delegated to: | Andes |
| Headers | show |
| Series | [1/1] cmd/exception: support ebreak exception on RISC-V | expand |
On Fri, Apr 9, 2021 at 6:48 PM Heinrich Schuchardt <xypron.glpk@gmx.de> wrote: > > The ebreak instruction should generate a breakpoint exception. > > Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> > --- > cmd/riscv/exception.c | 10 ++++++++++ > doc/usage/exception.rst | 3 +++ > 2 files changed, 13 insertions(+) > Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
> From: Heinrich Schuchardt [mailto:xypron.glpk@gmx.de] > Sent: Friday, April 09, 2021 6:48 PM > To: Rick Jian-Zhi Chen(陳建志) > Cc: u-boot@lists.denx.de; Heinrich Schuchardt > Subject: [PATCH 1/1] cmd/exception: support ebreak exception on RISC-V > > The ebreak instruction should generate a breakpoint exception. > > Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> > --- > cmd/riscv/exception.c | 10 ++++++++++ > doc/usage/exception.rst | 3 +++ > 2 files changed, 13 insertions(+) Reviewed-by: Rick Chen <rick@andestech.com>
diff --git a/cmd/riscv/exception.c b/cmd/riscv/exception.c index 9687cec812..7a08061d12 100644 --- a/cmd/riscv/exception.c +++ b/cmd/riscv/exception.c @@ -8,6 +8,13 @@ #include <common.h> #include <command.h> +static int do_ebreak(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]) +{ + asm volatile ("ebreak\n"); + return CMD_RET_FAILURE; +} + static int do_unaligned(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) { @@ -28,6 +35,8 @@ static int do_undefined(struct cmd_tbl *cmdtp, int flag, int argc, } static struct cmd_tbl cmd_sub[] = { + U_BOOT_CMD_MKENT(ebreak, CONFIG_SYS_MAXARGS, 1, do_ebreak, + "", ""), U_BOOT_CMD_MKENT(unaligned, CONFIG_SYS_MAXARGS, 1, do_unaligned, "", ""), U_BOOT_CMD_MKENT(undefined, CONFIG_SYS_MAXARGS, 1, do_undefined, @@ -37,6 +46,7 @@ static struct cmd_tbl cmd_sub[] = { static char exception_help_text[] = "<ex>\n" " The following exceptions are available:\n" + " ebreak - breakpoint\n" " undefined - illegal instruction\n" " unaligned - load address misaligned\n" ; diff --git a/doc/usage/exception.rst b/doc/usage/exception.rst index db1490f005..27df88bd5c 100644 --- a/doc/usage/exception.rst +++ b/doc/usage/exception.rst @@ -31,6 +31,9 @@ type **RISC-V:** + ebreak + breakpoint exception + unaligned load address misaligned
The ebreak instruction should generate a breakpoint exception. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> --- cmd/riscv/exception.c | 10 ++++++++++ doc/usage/exception.rst | 3 +++ 2 files changed, 13 insertions(+) -- 2.31.0