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gdbstub/user-target: Convert host errno to GDB File-I/O errno

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Use host_to_gdb_errno to convert host-supplied errnos to their GDB
File-I/O remote protocol values, and use them in F reply packets.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2751
Reported-by: Dominik 'Disconnect3d' Czarnota <dominik.b.czarnota@gmail.com>
Signed-off-by: Yodel Eldar <yodel.eldar@yodel.dev>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20260116014612.226183-4-yodel.eldar@yodel.dev>
Message-ID: <20260203115201.2387721-10-alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
This commit is contained in:
Yodel Eldar
2026-02-03 11:51:59 +00:00
committed by Alex Bennée
parent c3fbf1a5f0
commit 62e2d445c2
1 changed files with 9 additions and 4 deletions
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13
gdbstub/user-target.c
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@@ -10,6 +10,7 @@
#include "qemu/osdep.h"
#include "exec/gdbstub.h"
#include "gdbstub/commands.h"
#include "gdbstub/syscalls.h"
#include "qemu.h"
#include "internals.h"
#ifdef CONFIG_LINUX
@@ -315,7 +316,8 @@ void gdb_handle_v_file_open(GArray *params, void *user_ctx)
int fd = open(filename, flags, mode);
#endif
if (fd < 0) {
g_string_printf(gdbserver_state.str_buf, "F-1,%x", errno);
int gdb_errno = host_to_gdb_errno(errno);
g_string_printf(gdbserver_state.str_buf, "F-1,%x", gdb_errno);
} else {
g_string_printf(gdbserver_state.str_buf, "F%x", fd);
}
@@ -327,7 +329,8 @@ void gdb_handle_v_file_close(GArray *params, void *user_ctx)
int fd = gdb_get_cmd_param(params, 0)->val_ul;
if (close(fd) == -1) {
g_string_printf(gdbserver_state.str_buf, "F-1,%x", errno);
int gdb_errno = host_to_gdb_errno(errno);
g_string_printf(gdbserver_state.str_buf, "F-1,%x", gdb_errno);
gdb_put_strbuf();
return;
}
@@ -350,7 +353,8 @@ void gdb_handle_v_file_pread(GArray *params, void *user_ctx)
ssize_t n = pread(fd, buf, bufsiz, offset);
if (n < 0) {
g_string_printf(gdbserver_state.str_buf, "F-1,%x", errno);
int gdb_errno = host_to_gdb_errno(errno);
g_string_printf(gdbserver_state.str_buf, "F-1,%x", gdb_errno);
gdb_put_strbuf();
return;
}
@@ -373,7 +377,8 @@ void gdb_handle_v_file_readlink(GArray *params, void *user_ctx)
ssize_t n = readlink(filename, buf, BUFSIZ);
#endif
if (n < 0) {
g_string_printf(gdbserver_state.str_buf, "F-1,%x", errno);
int gdb_errno = host_to_gdb_errno(errno);
g_string_printf(gdbserver_state.str_buf, "F-1,%x", gdb_errno);
gdb_put_strbuf();
return;
}