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gdbserver: Add PID parameter to linux_get_auxv and linux_get_hwcap

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This patch doesn't change gdbserver behaviour, but after later changes are
made it avoids a null pointer dereference when HWCAP needs to be obtained
for a specific process while current_thread is nullptr.

Fixing linux_read_auxv, linux_get_hwcap and linux_get_hwcap2 to take a PID
parameter seems more correct than setting current_thread in one particular
code path.

Changes are propagated to allow passing the new parameter through the call
chain.

Approved-By: Simon Marchi <simon.marchi@efficios.com>
This commit is contained in:
Thiago Jung Bauermann
2022-08-18 18:21:18 +00:00
parent cbd02f9fa5
commit 43e5fbd8b7
11 changed files with 36 additions and 37 deletions
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4
gdbserver/target.h
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@@ -172,10 +172,10 @@ public:
/* Return true if the read_auxv target op is supported. */
virtual bool supports_read_auxv ();
/* Read auxiliary vector data from the inferior process.
/* Read auxiliary vector data from the process with pid PID.
Read LEN bytes at OFFSET into a buffer at MYADDR. */
virtual int read_auxv (CORE_ADDR offset, unsigned char *myaddr,
virtual int read_auxv (int pid, CORE_ADDR offset, unsigned char *myaddr,
unsigned int len);
/* Returns true if GDB Z breakpoint type TYPE is supported, false