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* [newlib-cygwin/main] RISC-V: fix setting up std streams in init_semihosting()
@ 2024-01-10 9:47 Corinna Vinschen
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From: Corinna Vinschen @ 2024-01-10 9:47 UTC (permalink / raw)
To: newlib-cvs
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=c419bbb341528a97d2de88539caf200c9dec1ffb
commit c419bbb341528a97d2de88539caf200c9dec1ffb
Author: Venkata Ramanaiah Nalamothu <quic_vnalamot@quicinc.com>
AuthorDate: Wed Jan 3 12:22:16 2024 +0530
Commit: Corinna Vinschen <corinna@vinschen.de>
CommitDate: Wed Jan 10 10:46:56 2024 +0100
RISC-V: fix setting up std streams in init_semihosting()
Currently init_semihosting() assumes the return value from _open()
call as the file descriptor handle and that is incorrect.
The semihost _open() call returns the fdtable index returned by the
__add_fdentry() for the file opened.
Diff:
---
libgloss/riscv/semihost-sys_fdtable.c | 19 ++++++++++---------
1 file changed, 10 insertions(+), 9 deletions(-)
diff --git a/libgloss/riscv/semihost-sys_fdtable.c b/libgloss/riscv/semihost-sys_fdtable.c
index 152c92d1513b..d62e3f9708fe 100644
--- a/libgloss/riscv/semihost-sys_fdtable.c
+++ b/libgloss/riscv/semihost-sys_fdtable.c
@@ -24,25 +24,26 @@ static struct fdentry fdtable[RISCV_MAX_OPEN_FILES];
void __attribute__ ((constructor))
init_semihosting ()
{
- int handle;
+ int i;
- for (int i=0; i<RISCV_MAX_OPEN_FILES; i++)
+ for (i=0; i<RISCV_MAX_OPEN_FILES; i++)
fdtable[i].handle = -1;
- /* Set up std streams. */
+ /* Set up std streams. Note that the semihost _open() call returns an index
+ into the fdtable. */
/* stdin. */
- handle = _open (":tt", O_RDONLY);
- fdtable[STDIN_FILENO].handle = handle;
+ i = _open (":tt", O_RDONLY);
+ fdtable[STDIN_FILENO].handle = fdtable[i].handle;
fdtable[STDIN_FILENO].pos = 0;
/* stdout. */
- handle = _open (":tt", O_WRONLY|O_CREAT|O_TRUNC);
- fdtable[STDOUT_FILENO].handle = handle;
+ i = _open (":tt", O_WRONLY|O_CREAT|O_TRUNC);
+ fdtable[STDOUT_FILENO].handle = fdtable[i].handle;
fdtable[STDOUT_FILENO].pos = 0;
/* stderr. */
- handle = _open (":tt", O_WRONLY|O_CREAT|O_APPEND);
- fdtable[STDERR_FILENO].handle = handle;
+ i = _open (":tt", O_WRONLY|O_CREAT|O_APPEND);
+ fdtable[STDERR_FILENO].handle = fdtable[i].handle;
fdtable[STDERR_FILENO].pos = 0;
}
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