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RISC-V: Allow long jumps to __syscall_error

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__syscall_error may end up farther than 1MiB away from a caller,
especially when linking statically large binaries. tail allows for
4GiB jumps and is reduced to j when a linked symbol is within range.

Fixes: 36960f0c76 ("RISC-V: Linux Syscall Interface")
Fixes: 7f33b09c65 ("RISC-V: Linux ABI")
Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
This commit is contained in:
Łukasz Stelmach 2022-09-16 21:31:27 +02:00 committed by DJ Delorie
parent 5652e12cce
commit 22c96052ac
6 changed files with 6 additions and 6 deletions
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2
sysdeps/unix/sysv/linux/riscv/clone.S
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@ -63,7 +63,7 @@ L (invalid):
li a0, -EINVAL
/* Something bad happened -- no child created. */
L (error):
j __syscall_error
tail __syscall_error
END (__clone)
/* Load up the arguments to the function. Put this block of code in

2
sysdeps/unix/sysv/linux/riscv/getcontext.S
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@ -70,7 +70,7 @@ LEAF (__getcontext)
ret
99: j __syscall_error
99: tail __syscall_error
PSEUDO_END (__getcontext)

2
sysdeps/unix/sysv/linux/riscv/setcontext.S
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@ -92,7 +92,7 @@ LEAF (__setcontext)
jr t1
99: j __syscall_error
99: tail __syscall_error
END (__setcontext)
libc_hidden_def (__setcontext)

2
sysdeps/unix/sysv/linux/riscv/swapcontext.S
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@ -118,7 +118,7 @@ LEAF (__swapcontext)
jr t1
99: j __syscall_error
99: tail __syscall_error
PSEUDO_END (__swapcontext)

2
sysdeps/unix/sysv/linux/riscv/sysdep.h
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@ -102,7 +102,7 @@
# else
# define SYSCALL_ERROR_HANDLER(name) \
.Lsyscall_error ## name: \
j __syscall_error;
tail __syscall_error;
# endif
/* Performs a system call, not setting errno. */

2
sysdeps/unix/sysv/linux/riscv/vfork.S
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@ -39,7 +39,7 @@ LEAF (__libc_vfork)
bltz a0, 1f
ret
1: j __syscall_error
1: tail __syscall_error
END (__libc_vfork)
weak_alias (__libc_vfork, vfork)